JP7723626B2 - Rotating electric machine system and hybrid power system equipped with the same - Google Patents

Description

The present invention relates to a rotating electric machine system. The present invention also relates to a hybrid power system in which a rotating electric machine system and an internal combustion engine are integrated.

A combined power system includes a rotating electric machine system and an internal combustion engine. As described in Patent Document 1, in a combined power system, the rotating shaft of the rotating electric machine system and the output shaft of the internal combustion engine are connected on the same axis. Therefore, the rotating shaft and the output shaft rotate integrally. As the rotating shaft rotates integrally with the output shaft, the rotating electric machine system functions, for example, as a generator.

Combined power systems are used, for example, as the power engine for propelling a flying vehicle. Regardless of whether the power engine of a flying vehicle is a gas engine or a combined power system, a fire prevention structure must be installed around the power engine. A known example of a fire prevention structure installed in a combined power system is the structure described in Patent Document 1. In this case, the combined power system is surrounded by an enclosure equipped with a carbon dioxide supply system. When a fire alarm is activated, carbon dioxide is supplied into the enclosure. This carbon dioxide extinguishes the fire.

The rotating electric machine system includes an electrical terminal unit. The electrical terminal unit is used to electrically connect external equipment (external resistors or external power sources) to the rotating electric machine. When the combined power system is enclosed in an enclosure, as described in Patent Document 2, it is necessary to provide a relay connector in the enclosure. In other words, the electrical terminal unit and relay connector are electrically connected in advance. When the combined power system is actually used, the external equipment is electrically connected to the relay connector.

Japanese Patent Application Laid-Open No. 2006-194226 Japanese Patent Application Publication No. 9-112753

Providing a relay connector as described in Patent Document 2 increases the number of parts. Therefore, it is possible to form through-holes in the enclosure and pass electrical terminals or electrical wiring through the through-holes. However, in this case, there is a concern that the through-holes may reduce the flame-blocking or heat-blocking capabilities.

The present invention aims to solve the above-mentioned problems.

According to one embodiment of the present invention, in a rotating electric machine system having a rotating electric machine and a rotating electric machine housing that rotatably supports a rotating shaft of the rotating electric machine,
the rotating shaft has a first end and a second end, a first bearing is provided between the rotating electric machine housing and the first end, and a second bearing is provided between the rotating electric machine housing and the second end, so that the rotating shaft is rotatably supported by the rotating electric machine housing via the first bearing and the second bearing;
the first end includes a protruding tip that passes through the first bearing and protrudes to the outside of the rotating electric machine housing,
a rotation parameter detector that is provided at the protruding tip via a holding member and detects a rotation parameter of the rotating shaft;
an electrical terminal portion electrically connected to the rotating electric machine;
a terminal casing provided at one end of the rotary electric machine housing and accommodating the electrical terminal portion;
a fire prevention member that covers at least the one end of the rotating electric machine housing and divides the rotating electric machine housing into a first area where the rotating electric machine housing is located and a second area where the rotating electric machine housing is not located and is a fire prevention area;
Equipped with
In the rotating electric machine system, when viewed from a side surface along a first direction that is an axial direction of the rotating electric machine system, the electrical terminal portion and the rotation parameter detector are arranged side by side in parallel,
A rotating electrical machine system is provided in which a first insertion hole is formed in the fire prevention member, and the terminal casing closes the first insertion hole.

According to another embodiment of the present invention, there is provided a hybrid power system including the above-described rotating electric machine system and an internal combustion engine. Here, the internal combustion engine has an output shaft that rotates integrally with the rotating shaft of the rotating electric machine system. The output shaft is connected to a second end of the rotating shaft. The internal combustion engine is located in the first region.

In this invention, a fire prevention member is provided on the rotating electrical housing, dividing the area into a first area where the rotating electrical housing is located and a second area where the rotating electrical housing is not located, with the fire prevention member as the boundary. Even if a spark or excessive heat occurs in the first area, the fire prevention member blocks the spark or heat, protecting the second area from the spark or heat.

A first insertion hole is formed in the fire-resistant member. A terminal casing housing an electrical terminal is engaged with the first insertion hole. Therefore, there is no need to provide a relay connector in the fire-resistant member. This avoids an increase in the number of parts.

The terminal casing engages with the first insertion hole. In other words, the first insertion hole is blocked by the terminal casing. This prevents a reduction in the flame and heat blocking capabilities of the fire protection member due to the formation of the first insertion hole in the fire protection member.

FIG. 1 is a schematic diagram of a flying vehicle equipped with a composite power system. FIG. 2 is a schematic overall perspective view of a combined power system according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional side view of a rotating electrical machine system according to an embodiment of the present invention. FIG. 4 is an enlarged view of the main part of FIG. FIG. 5 is an enlarged view of a main part of FIG. 3 at a different location from that of FIG. FIG. 6 is a schematic diagram showing the configuration of a current converter provided in a housing of a rotating electrical machine. FIG. 7 is a schematic perspective view of a second sub-housing that constitutes the rotary electric machine housing and an inner housing in the engine housing. FIG. 8 is a schematic cross-sectional side view of a gas turbine engine that constitutes a combined power system. FIG. 9 is a schematic side view of a rotating electrical machine system including a fire prevention member having a different shape from that shown in FIG.

In the following, "left," "right," "bottom," and "top" refer to the left, right, bottom, and top directions, respectively, particularly in Figures 3 to 5 and 8. However, these directions are merely used for convenience to simplify the explanation and make it easier to understand. In other words, the directions described in the specification are not necessarily the directions when the combined power system is actually used.

Figure 1 is a schematic diagram of a flying vehicle 500. A first partition wall 502 and a second partition wall 503 are provided inside the flying vehicle 500. Inside the flying vehicle 500, the first partition wall 502 separates the crew compartment 504 from the electrical equipment compartment 506, and the second partition wall 503 separates the electrical equipment compartment 506 from the engine room 508. The crew resides in the crew compartment 504. A control device 510 is provided in the electrical equipment compartment 506. The control device 510 controls the combined power system 400 and the motor 512.

The engine room 508 is equipped with the combined power system 400 according to this embodiment. The combined power system 400 is used, for example, as a power engine that rotates a propeller or ducted fan (neither of which are shown) via a motor 512. In other words, the combined power system 400 is the power engine that propels the flying object 500. A suitable example of the flying object 500 is a multicopters. Another example of the flying object 500 is a drone. The crew compartment 504 can also be replaced with a luggage compartment.

Figure 2 is a schematic overall perspective view of the combined power system 400. The combined power system 400 comprises a rotating electric machine system 10 and a gas turbine engine 200. An axis passing through the diameter center of the rotating electric machine system 10 and extending along the longitudinal direction (axial direction) coincides with an axis passing through the diameter center of the gas turbine engine 200 and extending along the longitudinal direction (axial direction). In other words, the rotating electric machine system 10 and the gas turbine engine 200 are arranged on the same axis.

Hereinafter, the left axial end of each of the rotating electric machine system 10 and the gas turbine engine 200 may be referred to as the first end. Similarly, the right axial end of each of the rotating electric machine system 10 and the gas turbine engine 200 may be referred to as the second end. That is, in the rotating electric machine system 10, the left end away from the gas turbine engine 200 is the first end. In the rotating electric machine system 10, the right end close to the gas turbine engine 200 is the second end. Also, in the gas turbine engine 200, the left end close to the rotating electric machine system 10 is the first end. In the gas turbine engine 200, the right end away from the rotating electric machine system 10 is the second end. According to this definition, in the illustrated example, the gas turbine engine 200 is disposed at the second end of the rotating electric machine system 10. The rotating electric machine system 10 is disposed at the first end of the gas turbine engine 200.

As described below, the gas turbine engine 200 is an internal combustion engine. The gas turbine engine 200 is also a gas supply device that supplies compressed air.

First, the rotating electric machine system 10 will be described. Figure 3 is a schematic side cross-sectional view of the rotating electric machine system 10. Here, arrow X in Figure 3 represents the axial direction (first direction) of the rotating electric machine system 10. In other words, Figure 3 shows a side view of the rotating electric machine system 10 along the first direction.

The rotating electric machine system 10 comprises a rotating electric machine 12 (e.g., a generator) and a rotating electric machine housing 14 that houses the rotating electric machine 12.

The rotating electrical machine housing 14 has a main housing 16, a first sub-housing 18, and a second sub-housing 20. The main housing 16 is generally cylindrical, with both its first and second ends open. The first sub-housing 18 is connected to the first end (left open end) of the main housing 16. The second sub-housing 20 is connected to the second end (right open end) of the main housing 16. As a result, the first and second ends of the main housing 16 are closed.

The main housing 16 has thick side walls extending in the left-right direction. A storage chamber 22 is formed inside the side walls. Most of the rotating electric machine 12 is housed in the storage chamber 22.

A spiral cooling jacket 24 is formed inside the side wall of the main housing 16. A cooling medium flows through the cooling jacket 24. A specific example of the cooling medium is cooling water. In this case, the cooling jacket 24 is a water jacket.

A first casing 26 and a second casing 28 are provided at the first end (left end) of the first sub-housing 18. The first casing 26 and the second casing 28 are part of the first sub-housing 18. That is, the first casing 26 and the second casing 28 are provided integrally with the first sub-housing 18. The first casing 26 and the second casing 28 are thereby supported by the rotating electrical machine housing 14. As described below, the first casing 26 is a terminal casing. The second casing 28 is a measuring device casing. The first casing 26, the second casing 28, and the first sub-housing 18 are preferably made of a refractory material.

A holding member that holds the rotational parameter detector is connected to the first sub-housing 18. In this embodiment, a resolver 132 is used as an example of the rotational parameter detector. Therefore, hereafter, the holding member for the rotational parameter detector will be referred to as the "resolver holder 30." As described below, a cap cover 32 is connected to the resolver holder 30 via screws.

The rotating electric machine 12 comprises a rotor 34 and a stator 36 that surrounds the outer periphery of the rotor 34.

The rotor 34 includes a rotating shaft 40. The rotating shaft 40 has an inner shaft 42 and a hollow cylindrical outer shaft 44. Both ends of the outer shaft 44 are open. That is, the outer shaft 44 has a left open end 441 (see Figure 4) and a right open end 442 (see Figure 5). The inner shaft 42 is removably inserted into the outer shaft 44.

The inner shaft 42 is longer than the outer shaft 44. The inner shaft 42 has a cylindrical portion 421, a left end 422 (see FIG. 4), and a right end 423 (see FIG. 5). The left end 422 connects to the left of the cylindrical portion 421. Therefore, the left end 422 is the end (first end) of the inner shaft 42 that is away from the gas turbine engine 200. The right end 423 connects to the right of the cylindrical portion 421. Therefore, the right end 423 is the end (second end) of the inner shaft 42 that is closest to the gas turbine engine 200. The diameter of the cylindrical portion 421 is smaller than the left end 422 and the right end 423. The diameter of the right end 423 is also smaller than the left end 422.

A portion of the left end 422 is exposed from the left open end 441 of the outer shaft 44. The portion exposed from the left open end 441 forms the protruding tip 46, which will be described later. In the illustrated example, the right end 423 of the inner shaft 42 and the right open end 442 of the outer shaft 44 are flush with each other. However, the right end 423 may be positioned slightly closer to the second end than the right open end 442.

As shown in detail in Figure 4, the left end 422 of the inner shaft 42 is provided with a first external thread portion 48, a flange portion 50, a stopper portion 52, and a second external thread portion 54, in this order, toward the right. The outer diameters of the first external thread portion 48, the flange portion 50, the stopper portion 52, and the second external thread portion 54 increase in this order. The outer diameter of the second external thread portion 54 is larger than the inner diameter of the outer shaft 44. Therefore, the right end of the second external thread portion 54 is stopped by the edge of the left open end 441 of the outer shaft 44. Therefore, the portion of the inner shaft 42 to the left of the second external thread portion 54 cannot be inserted into the outer shaft 44.

A resolver rotor 56 is attached to the flange 50. A small cap nut 58 is screwed onto the first externally threaded portion 48. The right end of the resolver rotor 56 is stopped by the stopper portion 52. The left end of the resolver rotor 56 is pressed by the small cap nut 58. As a result, the resolver rotor 56 is positioned and fixed to the flange 50.

A large cap nut 60 is threaded onto the second external thread portion 54. The right end of the large cap nut 60 covers the outer peripheral wall of the left open end 441 of the outer shaft 44. This restrains the left end 422 of the inner shaft 42 to the left open end 441 of the outer shaft 44. The first external thread portion 48 and the second external thread portion 54 are reverse-threaded. Therefore, the small cap nut 58 and the large cap nut 60 are rotated counterclockwise when threaded. After threading, it is preferable to deform part of the threads of the small cap nut 58 and the large cap nut 60. This prevents the small cap nut 58 and the large cap nut 60 from loosening.

As shown in FIG. 5, a connecting hole 62 is formed in the right end 423, which is the second end of the inner shaft 42. The connecting hole 62 extends toward the left end 422, which is the first end. A female thread 64 is formed in the inner peripheral wall of the connecting hole 62. The left end of the output shaft 204 is inserted into the connecting hole 62. The left end of the output shaft 204 is connected to the inner shaft 42 by threading into the female thread 64. The output shaft 204 holds a compressor wheel 222 and a turbine wheel 224 (see FIG. 8).

A first internal spline 66 is formed on the outer peripheral wall of the right open end 442 of the outer shaft 44. The first internal spline 66 extends along the axial direction (left-right direction) of the rotating electrical machine system 10.

As shown in Figure 3, the outer diameter of the outer shaft 44 is greatest at approximately the middle portion in the longitudinal direction. Multiple permanent magnets 72 are held in this large-diameter middle portion via magnet holders 70. Adjacent permanent magnets 72 have opposite polarities facing outward. As the rotating shaft 40 rotates, the permanent magnets 72 move around the circumference of a predetermined imaginary circle centered on the center of rotation of the rotating shaft 40.

The left end (first end) of the rotating shaft 40 is rotatably supported in the first sub-housing 18 via a first bearing 74. As shown in FIG. 3, the first bearing 74 is inserted between the outer shaft 44 and the first sub-housing 18. Specifically, the first sub-housing 18 has a cylindrical protrusion 76 that protrudes toward the main housing 16. A first insertion hole 78 is formed in the cylindrical protrusion 76. A first bearing holder 80 that holds the first bearing 74 is inserted into the first insertion hole 78. Thus, the first bearing 74 is positioned in the first insertion hole 78.

The first insertion hole 78 extends in the left-right direction. The left end of the first insertion hole 78 is farther from the output shaft 204 than the right end of the first insertion hole 78. Hereinafter, the left end of the first insertion hole 78 will also be referred to as the "first distal end 781." On the other hand, the right end of the first insertion hole 78 is closer to the output shaft 204 than the left end of the first insertion hole 78 (first distal end 781). Hereinafter, the right end of the first insertion hole 78 will also be referred to as the "first proximal end 782."

A first outer stopper 81 located at the first distal end 781 and a first inner stopper 82 located at the first proximal end 782 are attached to the small-diameter left end of the outer shaft 44. The first bearing 74 is sandwiched between the first outer stopper 81 and the first inner stopper 82. This clamping positioning fixes the first bearing 74. A clearance is formed between the first outer stopper 81 and the cylindrical protrusion 76.

The tip of the left end of the rotating shaft 40 passes through the inner hole of the first bearing 74 and then through the first insertion hole 78. The tip of the left end of the rotating shaft 40 is further exposed outside the cylindrical protrusion 76 (hollow recess 118). Hereinafter, the portion of the rotating shaft 40 that protrudes from the left end of the first bearing 74 will be referred to as the "protruding tip 46." The protruding tip 46 includes the first externally threaded portion 48, flange portion 50, stopper portion 52, and second externally threaded portion 54 of the left end 422 of the inner shaft 42 (see Figure 4).

The right end (second end) of the rotating shaft 40 is rotatably supported in the second sub-housing 20 via a second bearing 84. As shown in Figure 5, the second bearing 84 is inserted between the outer shaft 44 and the second sub-housing 20, which has a generally circular disk shape.

The second sub-housing 20 is connected to the main housing 16 via bolts (not shown). The center of the second sub-housing 20 is a thick-walled cylindrical portion. A second insertion hole 86 is formed in this cylindrical portion. The second insertion hole 86 extends in the left-right direction. The left end of the second insertion hole 86 is farther from the output shaft 204 than the right end of the second insertion hole 86. Hereinafter, the left end of the second insertion hole 86 will also be referred to as the "second distal end 861." On the other hand, the right end of the second insertion hole 86 is closer to the output shaft 204 than the left end of the second insertion hole 86 (second distal end 861). Hereinafter, the right end of the second insertion hole 86 will also be referred to as the "second proximal end 862."

A second bearing holder 88 holding a second bearing 84 is inserted into the second insertion hole 86. Thus, the second bearing 84 is positioned in the second insertion hole 86. The second bearing 84 is clamped between a second inner stopper 90 located at the second distal end 861 and a second outer stopper 92 located at the second proximal end 862. Based on this clamping, the second bearing 84 is positioned and fixed.

Furthermore, at the second distal end 861, a clearance is formed between the second inner stopper 90 and the second bearing holder 88. This clearance is the first sub-branch path 941.

A flow straightening member 96 is connected to the end face of the second sub-housing 20 facing the gas turbine engine 200. The flow straightening member 96 has a bottom portion 98, a reduced diameter portion 100, and a top portion 102. The bottom portion 98 facing the second sub-housing 20 is a large-diameter, thin-walled cylindrical plate. The top portion 102 facing the gas turbine engine 200 is a small-diameter, relatively long cylindrical plate. The reduced diameter portion 100 between the bottom portion 98 and the top portion 102 has a gradually decreasing diameter. Therefore, the flow straightening member 96 has a mountain-shaped or bottomless cup-shaped body. The outer surface of the reduced diameter portion 100 is a smooth surface with low surface roughness.

An inlet 104 is formed on the end surface of the bottom portion 98 facing the second sub-housing 20. The reduced diameter portion 100 is hollow. That is, a relay chamber 106 is formed inside the reduced diameter portion 100. The inlet 104 is an input port for compressed air into the relay chamber 106.

A through hole 108 is formed in the top portion 102 along the left-right direction. The diameter (opening diameter) of the through hole 108 is larger than the outer diameter of the portion of the second outer stopper 92 that extends along the rotating shaft 40. Therefore, the portion of the second outer stopper 92 that has entered the through hole 108 and its outer peripheral wall are spaced apart from the inner wall of the through hole 108. In other words, a clearance is formed between the outer peripheral wall of the second outer stopper 92 and the inner wall of the through hole 108. This clearance is the second sub-branch passage 942. The relay chamber 106 becomes wider as it approaches the through hole 108 and the second sub-branch passage 942.

The diameter (opening diameter) of the insertion hole 108 is larger than the outer diameter of the relatively small-diameter left end (small-diameter cylindrical portion 242) of the compressor wheel 222. Therefore, the small-diameter cylindrical portion 242 that enters the insertion hole 108 also moves away from the inner wall of the insertion hole 108. In other words, a clearance is formed between the outer peripheral wall of the small-diameter cylindrical portion 242 and the inner wall of the insertion hole 108. This clearance is the outlet passage 943.

As shown in FIG. 3, the first insertion hole 78 and the first sub-branch passage 941 communicate with the storage chamber 22. Therefore, the first bearing 74 and the second bearing 84 are exposed to the storage chamber 22.

The stator 36, together with the rotor 34, constitutes the rotating electric machine 12. The stator 36 has an electromagnetic coil 110 and multiple insulating substrates 112. The electromagnetic coils 110 include three types of coils: a U-phase coil, a V-phase coil, and a W-phase coil, which are wound around the insulating substrates 112. When the rotating electric machine 12 is a generator, the rotating electric machine 12 is a so-called three-phase power supply. The multiple insulating substrates 112 are arranged in a circular ring shape. This arrangement forms an inner hole in the stator 36.

The stator 36 is stored in the storage chamber 22. Here, the second sub-housing 20 serves as a stator holder. That is, an annular recess 114 is formed in the second sub-housing 20. The insulating substrate 112 included in the stator 36 engages with this annular recess 114. This engagement positions and fixes the stator 36. Furthermore, the cylindrical protrusion 76 enters the left opening of the inner hole of the stator 36.

The inner wall of the storage chamber 22 and the electromagnetic coil 110 are spaced slightly apart from each other. This space electrically insulates the main housing 16 and the electromagnetic coil 110.

A clearance is formed between the outer wall of the cylindrical protrusion 76 and the insulating substrate 112. A clearance is also formed between the outer wall of the permanent magnet 72 and the inner wall of the electromagnetic coil 110. As described below, compressed air, which is a gas, flows through these clearances. In other words, these clearances are part of the compressed air flow path.

As shown in FIG. 3, the first sub-housing 18 has an annular protrusion 116 that protrudes in an annular shape. Inside the annular protrusion 116 is a hollow recess 118. The protruding tip 46, which is part of the left end 422 of the inner shaft 42, extends into the hollow recess 118.

A resolver holder 30 is mounted on the annular protrusion 116. The resolver holder 30 has a flange-shaped stopper 120 that protrudes radially outward. The flange-shaped stopper 120 has a diameter larger than the inner diameter of the annular protrusion 116. Therefore, the flange-shaped stopper 120 abuts against the annular protrusion 116. This abutment positions the resolver holder 30. In this state, the resolver holder 30 is connected to the first sub-housing 18, for example, via a mounting bolt (not shown).

In the resolver holder 30, a small cylindrical portion 122 is provided to the left of the flange-shaped stopper 120. Furthermore, a large cylindrical portion 124 is provided to the right of the flange-shaped stopper 120. The large cylindrical portion 124 has a larger diameter than the small cylindrical portion 122. A retaining hole 126 is formed in the resolver holder 30. Most of the resolver stator 130 is fitted into the retaining hole 126. This fit holds the resolver stator 130 in the resolver holder 30.

When the large cylindrical portion 124 enters the hollow recess 118 and the flange-shaped stopper 120 abuts against the annular protrusion 116, the resolver rotor 56 is positioned in the inner hole of the resolver stator 130. The resolver stator 130, the resolver rotor 56, and the transmitting connector 136 (described below) constitute the resolver 132. The resolver 132 is a rotation parameter detector. In this embodiment, the resolver 132 detects the rotation angle of the inner shaft 42. As described above, the resolver rotor 56 is held by the flange 50 on the left end 422 of the inner shaft 42.

An engagement hole 134 is formed in the flange-shaped stopper 120. A transmitting connector 136 engages with the engagement hole 134. The resolver stator 130 and the transmitting connector 136 are electrically connected via a signal line 138. The first end of the transmitting connector 136 is exposed from the engagement hole 134. A connector hole (not shown) is provided on the end face of this first end. A receiving connector of a receiver (not shown) is inserted into this connector hole. In other words, the first end of the transmitting connector 136 is a connector connection portion. As a result of inserting the receiving connector into the connector hole, the resolver 132 and the receiver are electrically connected via the transmitting connector 136 and the receiving connector. The receiver receives the signal emitted by the resolver 132.

The small cylindrical portion 122 has multiple tab portions 140. One tab portion 140 is shown in Figure 3. Note that the tab portion 140 is omitted from Figure 2. Furthermore, a cap cover 32 is placed over the small cylindrical portion 122. The cap cover 32 closes the left opening of the small cylindrical portion 122 and shields the left end portion 422 of the inner shaft 42. Note that the cap cover 32 is connected to the tab portion 140 via a connecting bolt 142.

As described above, the first casing 26 and the second casing 28 are integrally provided at the first end of the first sub-housing 18 (see FIG. 2). The first casing 26 houses the U-phase terminal 1441, the V-phase terminal 1442, and the W-phase terminal 1443. The U-phase terminal 1441 is electrically connected to the U-phase coil of the electromagnetic coil 110. The V-phase terminal 1442 is electrically connected to the V-phase coil of the electromagnetic coil 110. The W-phase terminal 1443 is electrically connected to the W-phase coil of the electromagnetic coil 110. The U-phase terminal 1441, the V-phase terminal 1442, and the W-phase terminal 1443 are electrical terminals to which external devices (external loads or external power sources) are electrically connected. Power generated by the rotating electric machine 12 is supplied to the external devices. An example of an external load is the motor 512. An example of an external device is the battery 146 shown in FIG. 6.

The second casing 28 is adjacent to the first casing 26. The second casing 28 houses a thermistor 148, which is a temperature measuring device. Although not specifically shown, the measurement terminal of the thermistor 148 is pulled out from the second casing 28 and then connected to the electromagnetic coil 110. The thermistor 148 detects (measures) the temperature of the electromagnetic coil 110. The temperature is a parameter other than a rotation parameter. A harness 149 is electrically connected to the thermistor 148. The harness 149 is connected to the transmitting connector 136, which constitutes the resolver 132, inside the first sub-housing 18.

The internal space (second flow passage) of the first casing 26 is connected to the storage chamber 22 via a communication passage 196. The internal space of the second casing 28 and the internal space of the first casing 26 may also be connected via an interconnecting hole (not shown).

As shown in FIG. 2, a current converter 150 is provided on the outer peripheral wall of the main housing 16. The current converter 150 is closer to the gas turbine engine 200 than the first casing 26. As shown in FIG. 6, the current converter 150 has a conversion circuit 152, a capacitor 154, and a control circuit 156. The conversion circuit 152, capacitor 154, and control circuit 156 are housed in an equipment case 158. The equipment case 158 is disposed, for example, on the outer peripheral wall of the main housing 16 at a location that does not interfere with the first hollow tube portion 1601, the second hollow tube portion 1602, and the third hollow tube portion 1603 (see FIG. 2).

The hollow interiors of the first hollow pipe section 1601, the second hollow pipe section 1602, and the third hollow pipe section 1603 are relay communication passages through which compressed air flows. In other words, in this embodiment, three relay communication passages are formed in the rotating electrical machine housing 14.

The conversion circuit 152 includes a power module 161. The conversion circuit 152 converts the AC current generated in the electromagnetic coil 110 into DC current. At this time, the capacitor 154 temporarily stores the DC current converted by the conversion circuit 152 as an electric charge. The conversion circuit 152 also has the function of converting DC current sent from the battery 146 into AC current. In this case, the capacitor 154 temporarily stores the DC current sent from the battery 146 to the electromagnetic coil 110 as an electric charge.

The control circuit 156 controls the current density of the DC current flowing from the capacitor 154 to the battery 146, or the DC current flowing in the opposite direction. The DC current from the battery 146 is supplied to the motor 512, for example, via an AC-DC converter (not shown).

The rotating electrical machine system 10 configured as described above is provided with a compressed air flow path. This compressed air flow path will now be described.

As shown in FIG. 7 , the second sub-housing 20 has an annular collecting passage 162 formed as an annular recess on its end surface facing the gas turbine engine 200. As described below, part of the compressed air generated by the gas turbine engine 200 flows through the collecting passage 162. Three upstream communication holes 164 are formed in the bottom wall of the collecting passage 162 (annular recess). The upstream communication holes 164 are input ports for compressed air.

Air relay paths 166 are provided inside the second sub-housing 20. The air relay paths 166 extend radially along the diameter of the second sub-housing 20. The air relay paths 166 communicate with the collecting flow path 162 on the outer diameter side via the upstream communication holes 164. In addition, three first downstream communication holes 1681-1683 are formed on the end face of the second sub-housing 20 facing the rotating electric machine 12. The first downstream communication holes 1681-1683 are first output ports of the air relay paths 166. The collecting flow path 162 and the air relay paths 166 form a distribution path.

Three second downstream communication holes 1701-1703 are formed on the end face of the second sub-housing 20 facing the gas turbine engine 200. The second downstream communication holes 1701-1703 are second output ports of the air relay path 166. The second downstream communication holes 1701-1703 are located radially inward of the first downstream communication holes 1681-1683. Therefore, the compressed air that flows through the air relay path 166 is divided into compressed air that enters the first downstream communication holes 1681-1683 and compressed air that enters the second downstream communication holes 1701-1703.

As shown in FIG. 2, first to third hollow pipes 1601 to 1603 are provided on the outer surface of the side wall of the main housing 16. The first downstream communication holes 1681 to 1683 open individually into the first to third hollow pipes 1601 to 1603, respectively. As can be seen from this, the air relay path 166 connects the collecting flow path 162 to the hollow interiors of the first to third hollow pipes 1601 to 1603. As shown in FIG. 3, the first to third hollow pipes 1601 to 1603 are located diametrically outward of the cooling jacket 24 formed inside the side wall of the main housing 16.

The first hollow tube section 1601 to the third hollow tube section 1603 extend along the axial direction of the main housing 16. The hollow interiors of the first hollow tube section 1601 to the third hollow tube section 1603 each communicate with the storage chamber 22 of the main housing 16. Therefore, compressed air that flows through the hollow interiors of the first hollow tube section 1601 to the third hollow tube section 1603 each flows into the storage chamber 22 of the main housing 16. The storage chamber 22 is part of the first flow passage.

As described above, the storage chamber 22 and the internal space of the first casing 26 are in communication with each other via the communication passage 196 (see Figure 4 in particular). Therefore, a portion of the compressed air that flows into the storage chamber 22 (part of the first flow passage) flows into the internal space of the first casing 26 (second flow passage) via the communication passage 196. Furthermore, if the internal spaces of the first casing 26 and the second casing 28 are in communication with each other via an interconnecting hole, the compressed air that flows into the internal space of the first casing 26 flows into the second casing 28 via the interconnecting hole.

In this embodiment, an example is shown in which first hollow tube section 1601 to third hollow tube section 1603 are provided, but the number of hollow tube sections is determined appropriately depending on the flow rate or flow speed required for the air curtain formed from compressed air. In other words, the number of hollow tube sections is not limited to three. Similarly, the cross-sectional area of the hollow tube sections is also determined appropriately depending on the flow rate or flow speed required for the air curtain.

The compressed air that flows into the storage chamber 22 is then divided into compressed air heading toward the first insertion hole 78 and compressed air heading toward the second insertion hole 86. Specifically, a portion of the compressed air flows through the clearance between the first sub-housing 18 and the rotor 34 toward the first insertion hole 78. In this way, the clearance between the first sub-housing 18 and the rotor 34 is the first branch path L. Meanwhile, the remaining portion of the compressed air flows mainly through the clearance between the outer wall of the permanent magnet 72 and the inner wall of the electromagnetic coil 110 toward the second insertion hole 86. In this way, the clearance between the outer wall of the permanent magnet 72 and the inner wall of the electromagnetic coil 110 is the second branch path M. The first branch path L, the second branch path M, and the first sub-branch path 941 form a first flow passage.

The compressed air that reaches the first branch path L forms an air curtain that seals in the lubricating oil supplied to the first bearing 74. Furthermore, the compressed air that reaches the first sub-branch path 941 (the second distal end 861 of the second insertion hole 86) from the second branch path M forms an air curtain that seals in the lubricating oil supplied to the second bearing 84. In this way, the compressed air that flows into the storage chamber 22 functions as an air curtain.

As shown in FIG. 5, three inlets 104 are formed in the bottom portion 98 of the flow straightening member 96. FIG. 5 shows only one of these. One inlet 104 is connected to the second downstream communication hole 1701 (not shown). Another inlet 104 is connected to the second downstream communication hole 1702 (shown). Another inlet 104 is connected to the second downstream communication hole 1703 (not shown). Therefore, compressed air output from the second downstream communication holes 1701-1703 enters the relay chamber 106 of the reduced diameter portion 100 of the flow straightening member 96 via the inlets 104.

The relay chamber 106 is connected to the insertion hole 108 formed in the top portion 102. The width of the relay chamber 106 increases as it approaches the insertion hole 108 and the second sub-branch path 942. As a result, the pressure of the compressed air decreases as it flows through the relay chamber 106.

The outlet of the relay chamber 106 faces the small-diameter cylindrical portion 242 of the compressor wheel 222. Therefore, the compressed air that enters the relay chamber 106 comes into contact with the small-diameter cylindrical portion 242 of the compressor wheel 222. The compressed air is then divided into compressed air that flows toward the second sub-branch path 942 and compressed air that flows toward the outlet path 943. As a result, the pressure of the compressed air that flows along the second sub-branch path 942 toward the second proximal end 862 of the second insertion hole 86 decreases.

The compressed air that reaches the second proximal end 862 of the second insertion hole 86 from the second sub-branch passage 942 forms an air curtain that seals the lubricating oil supplied to the second bearing 84. Furthermore, the compressed air that flows into the outlet passage 943 is directed toward the inside of the first end (open end) of the shroud case 220. This compressed air is then sucked back into the compressor wheel 222.

An exhaust path 172 (first exhaust path) is formed in the main housing 16. Compressed air that reaches the first branch path L and the second branch path M is exhausted to the outside of the main housing 16 via the exhaust path 172.

As shown in Figures 2 and 3, at the first end where the first sub-housing 18 is provided, the portion that protrudes most in the first direction (axial direction of the rotating electrical machine system 10/direction of arrow X) is the transmitting connector 136. As shown in Figure 3, a first imaginary extrapolation line A is drawn from the left end of this transmitting connector 136 toward the second direction. Note that the second direction is a direction perpendicular to the first direction, and in this embodiment, is the diameter direction of the rotating electrical machine system 10. In Figures 2 to 4, the second direction is represented by arrow Y.

On the other hand, the parts of the main housing 16 that protrude most in the second direction (diameter direction of the rotating electrical machine system 10) are the first hollow tube section 1601 to the third hollow tube section 1603. As shown in FIG. 3, when the first imaginary extrapolation line A extends toward the second hollow tube section 1602, a second imaginary extrapolation line B is drawn along the second hollow tube section 1602, extending toward the first imaginary extrapolation line A.

As a result, as shown in FIG. 3 , a space SP is formed that is surrounded by the first imaginary extrapolation line A, the second imaginary extrapolation line B, and the main housing 16. In this embodiment, the first casing 26 is located within the space SP. Furthermore, when viewing the side of the rotating electrical machine system 10, the first casing 26 and the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 within the first casing 26 are arranged in parallel.

As shown in Figures 2 to 4, the rotating electric machine system 10 includes a fire protection member 180. In this embodiment, the fire protection member 180 is a wall made of fire-resistant material. The fire protection member 180 is supported on the rotating electric machine housing 14 via support columns (not shown). Alternatively, the fire protection member 180 is supported on the inner wall of the engine room 508 via support members (not shown).

The fire protection member 180 divides the engine room 508 into a first area AR1 where the combined power system 400 (rotating electric machine system 10 and gas turbine engine 200) is located, and a second area AR2 where the combined power system 400 is not located. As described above, the fire protection member 180 is made of fire-resistant material. Therefore, the second area AR2 is protected as a fire-prevention area.

The fire protection member 180 has a first vertical portion 181a, a horizontal portion 181b, and a second vertical portion 181c. As shown in Figures 2 and 3, a first insertion hole 182 is formed in the horizontal portion 181b, and a second insertion hole 184 is formed in the first vertical portion 181a.

The first vertical portion 181a is a vertical wall extending from below toward above near the resolver holder 30 and the first sub-housing 18. The first vertical portion 181a covers the first sub-housing 18 located at the first end of the rotating electric machine housing 14. As can be seen from this, the fire protection member 180 shields the first end of the rotating electric machine system 10.

The first end of the transmitting connector 136 passes through the second insertion hole 184 formed in the first vertical portion 181a. Specifically, the first end of the transmitting connector 136 passes through the second insertion hole 184 and is exposed in the second area AR2. Any portion of the transmitting connector 136, such as the middle portion (or second end), is located within the second insertion hole 184. Therefore, the transmitting connector 136 engages with the second insertion hole 184. The opening dimensions of the second insertion hole 184 are approximately the same as the outer dimensions of the transmitting connector 136. Therefore, the gap between the second insertion hole 184 and the transmitting connector 136 is approximately 1 mm or less, which is so small that it can be ignored. In other words, the second insertion hole 184 is blocked by the transmitting connector 136.

Signals flow through the signal line 138 and harness 149 via the transmitting connector 136. In other words, according to this embodiment, signals can be exchanged between the resolver 132 and thermistor 148 and the control device 510 while protecting the signal line 138 and harness 149 within the first sub-housing 18.

The horizontal portion 181b is bent approximately perpendicular to the first vertical portion 181a and extends slightly from the first end toward the second end of the rotating electrical machine housing 14. The second vertical portion 181c is bent approximately perpendicular to the horizontal portion 181b and extends from below toward above.

The first casing 26 passes through the first insertion hole 182 formed in the horizontal portion 181b. Specifically, the first end of the first casing 26 passes through the first insertion hole 182 and is exposed to the second area AR2. The first casing 26 protrudes upward from the first insertion hole 182. Any portion of the first casing 26, such as the middle portion (or the second end), is located within the first insertion hole 182. Therefore, the first casing 26 engages with the first insertion hole 182. The width dimension of the first insertion hole 182 (the dimension perpendicular to the X and Y directions) is approximately equal to the outer dimension of the first casing 26. Therefore, the gap between the first insertion hole 182 and the first casing 26 is approximately 1 mm or less, which is negligibly small. In other words, the first insertion hole 182 is blocked by the first casing 26.

Next, the gas turbine engine 200 will be described. As shown in FIG. 8 , the gas turbine engine 200 includes an engine housing 202 and an output shaft 204 that rotates within the engine housing 202. The engine housing 202 includes an inner housing 2021 and an outer housing 2022. The inner housing 2021 is connected to the second sub-housing 20 of the rotating electrical machine system 10. The outer housing 2022 is connected to the inner housing 2021. The outer housing 2022 is the housing body.

As shown in Figures 2 and 7, the inner housing 2021 has a first annular portion 206, a second annular portion 208, and a plurality of legs 210. The first annular portion 206 is connected to the second sub-housing 20. The diameter of the second annular portion 208 is larger than the diameter of the first annular portion 206. The legs 210 connect the first annular portion 206 and the second annular portion 208. In the illustrated example, the number of legs 210 is six. However, the number of legs 210 is determined depending on the connection strength required between the gas turbine engine 200 and the rotating electrical system 10. In other words, the number of legs 210 is not limited to six as shown in the illustrated example.

A cylindrical cover portion 212 protrudes from the central opening of the second annular portion 208 toward the rotating electrical machine system 10. The right ends of the legs 210 are connected to both cylindrical cover portions 212. An air intake space 214 is formed between the legs 210.

As shown in Figures 7 and 8, bleed passages 216 are individually formed inside the six leg portions 210. The inlets of the bleed passages 216 are individually formed in the leg portions 210 at the connection points with the cylindrical cover portion 212. The outlets of the bleed passages 216 are individually formed in the end faces of the first annular portion 206 facing the second sub-housing 20. All of the outlets of the bleed passages 216 are located on the circumference of an imaginary circle. Therefore, all of the outlets of the bleed passages 216 overlap with the annular-shaped collecting passage 162. In other words, all of the multiple bleed passages 216 are connected to the collecting passage 162. In this way, compressed air from the multiple bleed passages 216 flows into and collects in the collecting passage 162.

An air vent hole 217 is formed in the leg portion 210. The air vent hole 217 extends linearly from the inner wall to the outer wall of the cylindrical cover portion 212. The air vent hole 217 can also extend from the inner wall of the cylindrical cover portion 212 to the outer wall of the leg portion 210. There may be one or more air vent holes 217. Furthermore, it is not necessary to form an air vent hole 217.

As shown in Figure 8, an annular engagement recess 218 is formed on the right end surface of the second annular portion 208. The engagement recess 218 positions and fixes the shroud case 220 and the diffuser 226 (described below).

As shown in FIG. 8, the gas turbine engine 200 further includes a shroud case 220, a compressor wheel 222, a turbine wheel 224, a diffuser 226, a combustor 228, and a nozzle 230.

The shroud case 220 is hollow and larger than the airflow straightening member 96. The small-diameter left end of the shroud case 220 faces the airflow straightening member 96. The large-diameter right end of the shroud case 220 is inserted into the cylindrical cover portion 212 of the inner housing 2021. The shroud case 220 gradually narrows in diameter from the right end to the left end, but the tip of the left end curves so that it widens outward in the diametrical direction.

The left end of the shroud case 220 is exposed to the intake space 214. The top 102 of the flow straightening member 96 extends into the interior of the left end of the shroud case 220. The curved side peripheral wall of the shroud case 220 is provided with an annular blocking flange portion 232. The outer edge of the blocking flange portion 232 abuts against the inner walls of the cylindrical cover portion 212 and the leg portion 210.

An air bleed port 234 is formed in the side wall of the shroud case 220 between the blocking flange portion 232 and the first engaging protrusion 238. The air bleed port 234 extends from the inner surface to the outer surface of the side wall of the shroud case 220. The air bleed port 234 is the entrance to the chamber 236 through which compressed air enters the chamber 236.

The chamber 236 is located between the bleed port 234 and the bleed passage 216. That is, the chamber 236 connects the bleed port 234 and the bleed passage 216. The chamber 236 is also open to the atmosphere via the air vent hole 217.

A first engagement protrusion 238 protrudes from the right end of the shroud case 220 toward the second annular portion 208. The first engagement protrusion 238 engages with the engagement recess 218 of the second annular portion 208. This engagement, together with the outer edge of the blocking flange portion 232 abutting against the inner walls of the cylindrical cover portion 212 and the leg portion 210, positions and fixes the shroud case 220 to the inner housing 2021. At the same time, a chamber 236 is formed, surrounded by the leg portion 210, the cylindrical cover portion 212, the second annular portion 208, the blocking flange portion 232 of the shroud case 220, the side peripheral wall, and the first engagement protrusion 238. The chamber 236 forms a ring shape surrounding the shroud case 220.

The compressor wheel 222 and turbine wheel 224 can rotate integrally with the rotating shaft 40 and the output shaft 204. Specifically, as shown in detail in Figure 5, the compressor wheel 222 has a small-diameter cylindrical portion 242 at its left end. This small-diameter cylindrical portion 242 enters the insertion hole 108 formed in the flow straightening member 96. A first external spline 239 is formed on the inner wall of the small-diameter cylindrical portion 242. This first external spline 239 meshes with the first internal spline 66 formed on the right open end 442 of the outer shaft 44.

The right open end 442 of the outer shaft 44 is press-fit into the hollow interior of the small diameter cylindrical portion 242. As a result, the inner peripheral wall of the left opening of the small diameter cylindrical portion 242 presses the outer peripheral wall of the right open end 442 of the outer shaft 44 radially inward. The compressor wheel 222 is connected to the outer shaft 44 (rotating shaft 40) by the above-mentioned meshing and press-fitting.

A through hole 240 extending in the left-right direction is formed at the diametric center of the compressor wheel 222. A second external spline 246 is engraved on the inner wall of the left end of this through hole 240. Furthermore, the diameter of the through hole 240 at the point where it connects to the hollow interior of the small-diameter cylindrical portion 242 is slightly smaller than other points. For this reason, an inner flange portion 248 is provided on the compressor wheel 222 near the opening of the through hole 240 on the small-diameter cylindrical portion 242 side. The diameter of the through hole 240 is smallest at the location where the inner flange portion 248 is provided.

The output shaft 204 attached to the turbine wheel 224 is inserted into the through-hole 240. The left end of the output shaft 204 extends to approximately the same position as the left end of the small-diameter cylindrical portion 242 of the compressor wheel 222. As described above, the outer peripheral wall of the right open end 442 of the outer shaft 44 is inserted into the hollow interior of the small-diameter cylindrical portion 242. Therefore, the left end of the output shaft 204 protruding from the through-hole 240 enters the connecting hole 62 of the rotating shaft 40. A male thread 252 is formed on the left end of the output shaft 204. The male thread 252 is threaded into the female thread 64 formed on the inner wall of the connecting hole 62. This threading connects the rotating shaft 40 and the output shaft 204.

A second internal spline 254 is formed near the left end of the output shaft 204. The second internal spline 254 meshes with a second external spline 246 formed on the inner circumferential wall of the through-hole 240. The left end of the output shaft 204 is press-fit into the inner flange portion 248.

As shown in FIG. 8, a ring member 256 is interposed between the compressor wheel 222 and the turbine wheel 224. In other words, the ring member 256 is sandwiched between the compressor wheel 222 and the turbine wheel 224, and seals the gap between the two wheels 222, 224. The ring member 256 is made of a heat-resistant metal material, such as a nickel-based alloy.

In the hollow interior of the outer housing 2022, portions of the shroud case 220 and compressor wheel 222, as well as the intermediate plate 266, are surrounded by the diffuser 226. A second engagement protrusion 273 is formed on the left end of the diffuser 226. The second engagement protrusion 273, together with the first engagement protrusion 238 of the shroud case 220, engages with the engagement recess 218. This engagement positions and fixes the diffuser 226 to the inner housing 2021.

In the hollow interior of the outer housing 2022, the turbine wheel 224 is surrounded by a nozzle 230, which is in turn surrounded by a combustor 228. An annular combustion air flow passage 274 is formed between the combustor 228 and the outer housing 2022. The combustion air flow passage 274 is a passage through which combustion air flows. A fuel supply nozzle 275 is positioned and fixed to the right end face of the outer housing 2022. The fuel supply nozzle 275 supplies fuel to the combustor 228.

The combustor 228 is formed with a relay hole 276 that connects the combustion air flow passage 274 with the interior of the combustor 228. As described below, combustion air compressed by the compressor wheel 222 passes through the diffuser 226, the combustion air flow passage 274, and the relay hole 276 and reaches the interior of the combustor 228. The combustor 228 also has micropores (not shown). The air discharged from the micropores forms an air curtain that cools the interior of the combustor 228.

The nozzle 230 has a section that surrounds the largest diameter portion of the turbine wheel 224. This section has a delivery hole (not shown) formed in it for supplying combusted fuel together with combustion air to the turbine wheel 224. Hereinafter, combusted fuel will also be referred to as "burned fuel." "Burned fuel" is synonymous with "combustion gas" or "exhaust gas after combustion."

An exhaust port 280 opens at the right end of the outer housing 2022 and the nozzle 230. After passing through the discharge holes and entering the nozzle 230, the burned fuel is blown out of the outer housing 2022 through the exhaust port 280 by the rotating turbine wheel 224. Although not specifically shown, the exhaust port 280 is provided with an exhaust pipe for discharging the burned fuel.

Although not specifically shown, the gas turbine engine 200 is provided with a fire protection member (not shown) separate from the fire protection member 180. That is, the separate fire protection member is located in the first area AR1 and protects the rotating electrical system 10 from heat generated by the gas turbine engine 200, etc.

The combined power system 400 according to this embodiment is basically configured as described above. Next, the effects of the combined power system 400 will be explained.

As described above, when viewing the side of the rotating electric machine system 10, the first casing 26 and the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 within the first casing 26 are arranged in parallel. The first casing 26 is located within the space SP shown in FIG. 3. The first imaginary extrapolation line A defining the space SP passes through the end of the transmitting connector 136 that protrudes most axially at the first end of the rotating electric machine system 10. The second imaginary extrapolation line B defining the space SP passes through the second hollow tube portion 1602 that protrudes most diametrically from the main housing 16. This prevents the first casing 26 from protruding beyond the transmitting connector 136 or the second hollow tube portion 1602.

In other words, according to this embodiment, the increase in the diameter and axial dimensions of the rotating electrical machine system 10 that would occur due to the provision of the first casing 26 is avoided. This allows the rotating electrical machine system 10 to be made more compact.

To start operation of the combined power system 400, the rotating shaft 40 is first rotated by a known starter (not shown). Alternatively, the rotating shaft 40 may be rotated by supplying power from the battery 146.

The latter case will be described. In this case, DC current is supplied from the battery 146. The conversion circuit 152 of the current converter 150 shown in Figures 2 and 6 converts this DC current into AC current. The AC current is supplied to the electromagnetic coils 110 (U-phase coil, V-phase coil, and W-phase coil) via the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443. When the AC current flows through the electromagnetic coils 110, an alternating magnetic field is generated in the stator 36. As a result, attractive and repulsive forces act alternately between the electromagnetic coil 110 and the permanent magnets 72 of the rotor 34. As a result, the rotating shaft 40 begins to rotate.

As shown in FIG. 5 , a first internal spline 66 is formed on the outer peripheral wall of the right open end 442 of the outer shaft 44, and a first external spline 239 is formed on the inner wall of the small-diameter cylindrical portion 242 of the compressor wheel 222. The first internal spline 66 and the first external spline 239 mesh with each other. Furthermore, a second internal spline 254 is formed on the output shaft 204, and a second external spline 246 is formed on the inner wall of the through hole 240 of the compressor wheel 222. The second internal spline 254 and the second external spline 246 mesh with each other. Therefore, the rotational torque of the rotating shaft 40 is quickly transmitted to the output shaft 204 via the compressor wheel 222.

In other words, when the rotating shaft 40 starts to rotate, the output shaft 204 also starts to rotate integrally with the rotating shaft 40. Accordingly, the compressor wheel 222 and turbine wheel 224 supported on the output shaft 204 rotate integrally with the output shaft 204. As described above, by meshing the first internal spline 66 with the first external spline 239 and meshing the second internal spline 254 with the second external spline 246, the rotational torque of the rotating shaft 40 can be sufficiently transmitted to the output shaft 204.

Furthermore, the right end of the rotating shaft 40 is press-fitted into the hollow interior of the small-diameter cylindrical portion 242 of the compressor wheel 222. Furthermore, the left end of the output shaft 204 is press-fitted into the inner flange portion 248 of the compressor wheel 222. Therefore, the axis of the rotating shaft 40 and the axis of the output shaft 204 are precisely aligned. This sufficiently prevents the output shaft 204 from rotating eccentrically or vibrating.

Furthermore, a frictional force is generated between the right end face of the compressor wheel 222 and the left end face of the ring member 256. A frictional force is also generated between the right end face of the ring member 256 and the left end face of the turbine wheel 224. This frictional force causes the compressor wheel 222, ring member 256, and turbine wheel 224 to adhere to one another. This prevents the wheels 222, 224 from rotating out of alignment.

As a result of the above rotation, as shown in FIG. 8, air is drawn into the shroud case 220 through the intake space 214 between the legs 210 of the inner housing 2021. Here, the rectifying member 96 is located at the diametric center of the inner housing 2021. As described above, the rectifying member 96 has a mountain-shaped configuration that narrows in diameter toward the shroud case 220. Furthermore, the surface of the narrowing portion 100 is smooth. Therefore, the suctioned air is rectified by the rectifying member 96 so that it flows toward the shroud case 220. Because the right end of the rectifying member 96 enters the left end opening of the shroud case 220, air is efficiently guided into the shroud case 220. Thus, by giving the rectifying member 96 the above-described shape and having the top portion 102 enter the shroud case 220, air can be efficiently captured by the shroud case 220.

Air drawn into the shroud case 220 flows between the compressor wheel 222 and the shroud case 220. Because the gap between the compressor wheel 222 and the shroud case 220 is sufficiently narrow compared to the left opening of the shroud case 220, the air is compressed as it flows through the gap. In other words, compressed air is generated.

An air bleed port 234 is formed in the shroud case 220. As a result, a portion of the compressed air is diverted from the air bleed port 234 as curtain air and flows into the chamber 236. The chamber 236 is annular and has a volume larger than the volume of the air bleed port 234. As a result, the curtain air that flows into the chamber 236 is temporarily stored in the chamber 236.

Since multiple bleed passages 216 are formed, compressed air is distributed from chamber 236 to each bleed passage 216. In this case, the pressure of the distributed curtain air may differ. However, in this embodiment, the compressed air (curtain air) that passes through bleed port 234 flows into a single annular chamber 236. This makes the pressure of the curtain air within chamber 236 uniform. In other words, the pressure of the curtain air is made uniform. In this way, chamber 236 is a pressure adjustment chamber that adjusts the pressure of the curtain air to a substantially constant level.

As mentioned above, the curtain air flowing in from the bleed port 234 is part of the compressed air and is under high pressure. Here, because the volume of the chamber 236 is larger than the volume of the bleed port 234, the curtain air diffuses as it flows into the chamber 236. This reduces the pressure of the curtain air. As can be seen from this, the chamber 236 also serves as a buffer chamber that reduces the pressure of the compressed air.

In addition to the bleed passage 216, the inner housing 2021 is also formed with an air vent hole 217. Excess compressed air is released outside the gas turbine engine 200 (to the atmosphere) through the air vent hole 217. This prevents the curtain air pressure in the chamber 236 from rising excessively. In other words, the air vent hole 217 makes it easy to adjust the pressure in the chamber 236.

In the chamber 236, the inlets of the bleed passages 216 formed individually in each of the six legs 210 open. Therefore, the curtain air in the chamber 236 then flows individually through the six bleed passages 216, thereby traveling toward the second sub-housing 20. As described above, the pressure of the curtain air at this point is approximately constant.

As shown in Figure 7, the outlets of the six bleed passages 216 all overlap the collecting passage 162. Therefore, the curtain air that has flowed through the six bleed passages 216 flows into the collecting passage 162, where it collects and then diffuses in a circular pattern along the collecting passage 162. In this process, the pressure of the curtain air is further equalized.

The curtain air then flows from the collecting flow path 162 into three upstream communication holes 164, and then flows separately along three air relay paths 166. A portion of the curtain air is then discharged from the first downstream communication holes 1681-1683. The remainder of the curtain air is discharged from the second downstream communication holes 1701-1703. Hereinafter, the curtain air discharged from the first downstream communication holes 1681-1683 will be referred to as "first diverted air." The curtain air discharged from the second downstream communication holes 1701-1703 will be referred to as "second diverted air."

The path of the first diverted air will now be explained. The first downstream communication hole 1681 is connected to the hollow interior of the first hollow pipe section 1601. The first downstream communication hole 1682 is connected to the hollow interior of the second hollow pipe section 1602. The first downstream communication hole 1683 is connected to the hollow interior of the third hollow pipe section 1603. Therefore, the first diverted air flows through the hollow interiors of the first hollow pipe section 1601 to the third hollow pipe section 1603 shown in Figure 2, etc., and flows from the second end to the first end of the rotating electric machine housing 14.

The first hollow pipe section 1601 to the third hollow pipe section 1603 are located on the outer periphery of the cooling jacket 24. A cooling medium is already flowing through the cooling jacket 24. Therefore, as the first diverted air flows along the first hollow pipe section 1601 to the third hollow pipe section 1603, the heat of the first diverted air is sufficiently conducted to the cooling medium. This results in the first diverted air having a relatively low temperature. In other words, in this embodiment, the first diverted air can be lowered in temperature by the cooling jacket 24, which cools the rotating electric machine 12, the current converter 150, etc. Therefore, there is no need to provide separate cooling equipment for cooling the curtain air in the gas turbine engine 200 or the rotating electric machine system 10. This eliminates the need to provide separate cooling equipment for cooling the curtain air in the gas turbine engine 200 or the rotating electric machine system 10. This allows the combined power system 400 to be more compact.

The first diverted air that has flowed through the first hollow tube section 1601 to the third hollow tube section 1603 flows into the storage chamber 22, which is part of the first flow passage, at the first end of the main housing 16. A portion of the first diverted air flows into the internal space (second flow passage) of the first casing 26 via the communication passage 196. This forms an air curtain within the first casing 26. If an interconnecting hole is formed between the first casing 26 and the second casing 28, the first diverted air that has passed through the first casing 26 flows into the second casing 28 via the interconnecting hole. As a result, an air curtain is formed within the second casing 28.

As shown in FIG. 3, the remainder of the first diverted air flows through the storage chamber 22 formed in the main housing 16. As can be seen from this, the storage chamber 22 (first flow passage) of the main housing 16 is upstream in the flow path of the first diverted air. The internal space of the first casing 26 (and the internal space of the second casing 28) is downstream in the flow path of the first diverted air.

Most of the first diverted air that flows in from the left end of the storage chamber 22 enters the clearance between the outer wall of the cylindrical protrusion 76 and the insulating substrate 112. This clearance is the inner hole of the stator 36.

The first diverged air that flows into the inner hole of the stator 36 is diverged into a first branch flow that flows through the first branch path L and a second branch flow that flows through the second branch path M. The first branch flow flows toward the first insertion hole 78 via the first branch path L. The second branch flow flows toward the second insertion hole 86 via the second branch path M, along the clearance between the outer wall of the permanent magnet 72 and the inner wall of the electromagnetic coil 110. In this way, the first diverged air is divided into a first branch flow that flows toward the first insertion hole 78 at the left end (first end) and a second branch flow that flows toward the second insertion hole 86 at the right end (second end).

The first branch flowing toward the first insertion hole 78 reaches the first proximal end 782 of the first insertion hole 78. At this first proximal end 782, the first branch flow becomes an air curtain for the first bearing 74. Meanwhile, the second branch flowing toward the second insertion hole 86 passes through the first sub-branch path 941 and reaches the second distal end 861 of the second insertion hole 86. At this second distal end 861, the second branch flow becomes an air curtain for the second bearing 84.

The path of the second diverted air will now be explained. The second downstream communication holes 1701-1703 overlap with three inlets 104 formed in the bottom portion 98 of the straightening member 96. Therefore, the second diverted air flows into the relay chamber 106 (the hollow interior of the straightening member 96) through the inlets 104.

As described above, the outlet of the relay chamber 106 opens at a position facing the small diameter cylindrical portion 242 of the compressor wheel 222. Therefore, the second diverted air that flows into the relay chamber 106 comes into contact with the small diameter cylindrical portion 242. A portion of the second diverted air then flows toward the second sub-branch path 942. The remainder of the second diverted air flows toward the outlet path 943.

A portion of the second diverted air reaches the second proximal end 862 of the second insertion hole 86 via the second sub-branch passage 942. At this second proximal end 862, this portion forms an air curtain around the second bearing 84. In this way, the second bearing 84 is sandwiched between the remainder of the second diverted air that has reached the second proximal end 862 and the second branch (a portion of the first diverted air) that has reached the second distal end 861.

The remainder of the second diverted air is discharged through outlet passage 943 into the interior of the left end of shroud case 220. As described above, air is being drawn into the left end opening of shroud case 220. Therefore, the remainder of the second diverted air is compressed by compressor wheel 222 together with the drawn-in atmospheric air.

As described above, air curtains are formed in the second branch path M, the first sub-branch path 941, and the second sub-branch path 942. These air curtains prevent lubricating oil from entering the internal spaces of the first casing 26 and the second casing 28. In other words, the curtain air (first diverted air and second diverted air) prevents lubricating oil from scattering from the first bearing 74 and the second bearing 84. This prevents lubricating oil from adhering to the permanent magnet 72, the electromagnetic coil 110, etc. In other words, it is possible to prevent components housed within the main housing 16 from being contaminated with lubricating oil.

The excess first diverted air passes through the storage chamber 22 and reaches the exhaust path 172. The excess second diverted air flows from the second end to the first end of the main housing 16, for example, via the clearance between the inner wall of the storage chamber 22 and the electromagnetic coil 110. The excess second diverted air then reaches the exhaust path 172. The first diverted air and second diverted air that reach the exhaust path 172 are collected by a collection device (not shown).

As described above, the chamber 236 provided between the inner housing 2021 and the shroud case 220 equalizes the pressure of the curtain air. This prevents pressure distribution in the curtain air. It also prevents surging of the curtain air. This makes it possible to supply the curtain air around the first bearing 74 and the second bearing 84 while maintaining a substantially constant pressure.

As described above, the relay chamber 106 becomes wider as it approaches the second sub-branch path 942. Furthermore, the second diverted air flowing out of the relay chamber 106 is divided into a portion that flows toward the second sub-branch path 942 and a portion that flows toward the outlet path 943. Therefore, the pressure of the second diverted air that reaches the second proximal end 862 is lower than the pressure of the second diverted air before it flows into the relay chamber 106. As a result, the pressure of the first diverted air that reaches the second distal end 861 and the pressure of the second diverted air that reaches the second proximal end 862 are balanced.

Compressed air that passes between the shroud case 220 and the compressor wheel 222 without entering the bleed port 234 becomes combustion air. As shown in FIG. 8 , the combustion air flows into the diffuser 226. The combustion air flows from an outlet hole formed in the wall of the diffuser 226 into the combustion air flow passage 274 between the combustor 228 and the outer housing 2022. The combustion air then flows into the combustion chamber (the hollow interior of the combustor 228) via the relay hole 276 formed in the combustor 228, the fine holes, and the clearance between the combustor 228 and the fuel supply nozzle 275.

The combustor 228 is preheated. Therefore, the combustion chamber is also at a high temperature. Fuel is supplied to the high-temperature combustion chamber from the fuel supply nozzle 275. The fuel burns together with the combustion air, becoming high-temperature burned fuel. When this burned fuel is supplied into the nozzle 230 from the delivery hole, it expands within the nozzle 230. This causes the turbine wheel 224 to begin rotating at high speed.

The output shaft 204 holds a turbine wheel 224. A compressor wheel 222 is also provided on the output shaft 204. Therefore, as the turbine wheel 224 rotates at high speed, the output shaft 204 and the compressor wheel 222 rotate together at high speed. At the same time, the rotating shaft 40 also rotates at high speed. The burned fuel is discharged outside the outer housing 2022 via an exhaust pipe (not shown) provided at the exhaust port 280.

When the output shaft 204 begins to rotate at high speed, the supply of current from the battery 146 (see Figure 6) to the electromagnetic coil 110 is stopped. However, because the turbine wheel 224 is already rotating at high speed as described above, the rotating shaft 40 rotates at high speed integrally with the turbine wheel 224 and output shaft 204. Even at this time, for the same reasons as described above, sufficient rotational torque is transmitted from the output shaft 204 to the rotating shaft 40.

In FIG. 3, it is preferable that the rotation direction of the output shaft 204 and the rotating shaft 40 be opposite to the rotation direction of the small cap nut 58, large cap nut 60, and male thread 252 when they are threaded together. This is because loosening of the small cap nut 58, large cap nut 60, and male thread 252 during rotation of the rotating shaft 40 is prevented. Note that a mechanism to prevent loosening may be provided on the small cap nut 58, large cap nut 60, or male thread 252.

Since the rotating shaft 40 holds the permanent magnet 72, an AC current is generated in the electromagnetic coil 110 surrounding the permanent magnet 72. The AC current is sent to the current converter 150 shown in Figures 2 and 6 via the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443. The conversion circuit 152 of the current converter 150 converts this AC current into DC current. When the control circuit 156 of the current converter 150 determines that the output of an external load (e.g., motor 512) electrically connected to the battery 146 has decreased, it supplies DC current to the battery 146 (see Figure 6) via the capacitor 154. This charges the battery 146.

The electromagnetic coil 110 generates heat as current flows through it. Here, a portion of the first diverted air comes into contact with the left end of the stator 36. Furthermore, the remainder of the first diverted air, which passes through the storage chamber 22 and heads toward the second insertion hole 86, comes into contact with the outer and inner walls of the stator 36. Therefore, the stator 36 is cooled by the first diverted air. A cooling medium also flows through the cooling jacket 24 provided on the main housing 16. The rotating electrical machine 12 is quickly cooled by this cooling medium.

Here, when the first casing 26 and the second casing 28 are mounted on the main housing 16, forming the cooling jacket 24 directly below the first casing 26 and the second casing 28 raises concerns that the main housing 16 may not have sufficient rigidity. However, in this embodiment, the first casing 26 and the second casing 28 are mounted on the first sub-housing 18, not on the main housing 16. This allows the cooling jacket 24 to extend from the first end to the second end of the main housing 16 (see Figure 6). This improves the cooling efficiency for the rotating electrical machine 12.

In this embodiment, the rotating electric machine housing 14 (main housing 16) that houses the rotating electric machine 12 and the first casing 26 that houses the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 are provided separately. Therefore, the heat generated in the stator 36 in the main housing 16 is unlikely to affect the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 in the first casing 26. In addition, the first casing 26 is far away from the gas turbine engine 200. Therefore, the heat generated in the gas turbine engine 200 is unlikely to affect the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 in the first casing 26.

When current is applied, the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 also generate heat. However, the U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443 are quickly cooled by a portion of the first diverted air supplied to the first casing 26.

In this way, the first diverted air also serves to cool heat-generating locations in the rotating electric machine system 10. Because the electrical terminals (U-phase terminal 1441, V-phase terminal 1442, and W-phase terminal 1443), electromagnetic coil 110, permanent magnet 72, etc. are cooled, the effects of heat on the output control of the rotating electric machine system 10, etc., are prevented. Furthermore, a reduction in the excitation of the electromagnetic coil 110, permanent magnet 72, etc. due to heat is also prevented. As a result, the reliability of the rotating electric machine system 10 is improved.

As described above, the rotating electric machine system 10 and the gas turbine engine 200 are cooled by compressed air. However, it is possible that the rotating electric machine system 10 and the gas turbine engine 200 may not be sufficiently cooled for some reason. As a result, for example, sparks may occur in the rotating electric machine 12. Or, abnormal combustion may occur in the gas turbine engine 200.

In this embodiment, the rotating electrical machine system 10 is provided with a fire-resistant member 180 (see Figures 2 to 4 in particular) made of a fire-resistant material. Therefore, even if a spark or abnormal combustion occurs in the first area AR1, the fire or heat is blocked by the fire-resistant member 180. This protects the second area AR2 and the passenger compartment 504 from sparks, heat, etc.

The fire-prevention member 180 has a first insertion hole 182 and a second insertion hole 184. The first end of the first casing 26 is exposed through the first insertion hole 182, and the first end of the transmitting connector 136 is exposed through the second insertion hole 184. Therefore, there is no need to provide the fire-prevention member 180 with relay connectors that relay the electrical connections between the U-phase terminal 1441, the V-phase terminal 1442, and the W-phase terminal 1443 and external devices. Similarly, there is no need for a relay connector to electrically connect the transmitting connector 136 and the receiving connector. There is also no need for a relay connector to electrically connect the harness 149 of the thermistor 148 and the control device 510 (see Figure 1). This avoids an increase in the number of parts.

Furthermore, the gap between the inner wall of the first insertion hole 182 and the first end of the first casing 26 is so small that it can be ignored. Similarly, the gap between the inner wall of the second insertion hole 184 and the transmitting connector 136 is also so small that it can be ignored. In this way, the first insertion hole 182 and the second insertion hole 184 are blocked by the first casing 26 and the transmitting connector 136, respectively. Therefore, sparks and the like generated in the first area AR1 are prevented from passing through the first insertion hole 182 or the second insertion hole 184 and reaching the second area AR2. In other words, the formation of the first insertion hole 182 and the second insertion hole 184 avoids a decrease in the flame-blocking and heat-blocking capabilities of the fire prevention member 180.

In this embodiment, the fire protection member 180 is provided as a wall. In other words, the fire protection member 180 does not form a large enclosure that covers the entire combined power system 400. This allows the fire protection member 180 to be made smaller and lighter. Furthermore, the engine room 508 (see Figure 1) that houses the combined power system 400 does not need to be large in volume. Moreover, there is no need for equipment to supply carbon dioxide to the inside of the enclosure. For these reasons, the flying vehicle 500 can also be made smaller and lighter.

In addition, the fire protection member 180 may be replaced with a fire protection member 190 shown in Figure 9. In this case, the fire protection member 190 is a hollow cylinder capable of housing the rotating electrical machine housing inside. The longitudinal dimension of the fire protection member 190 is approximately the same as the sum of the longitudinal dimensions of the first sub-housing 18 and the main housing 16. Therefore, the fire protection member 190 covers the outer periphery of the first sub-housing 18 and the main housing 16.

The second end of the fire protection member 190 is an open end. The diameter of the fire protection member 190 is smaller than the diameter of the second sub-housing 20. Therefore, the second end of the fire protection member 190 abuts against the outer surface of the second sub-housing 20 that faces the main housing 16.

A first insertion hole 182 and a second insertion hole 184 are formed in the fire protection member 190. The first insertion hole 182 and the second insertion hole 184 penetrate from the inner peripheral wall to the outer peripheral wall of the fire protection member 190. Even in this case, the first insertion hole 182 and the second insertion hole 184 are blocked by the first casing 26 and the transmitting connector 136, respectively.

As the rotating shaft 40 rotates, the rotation angle (rotation parameter) of the rotating shaft 40 is detected by the resolver 132. Specifically, the resolver rotor 56 attached to the left end 422 of the inner shaft 42 rotates integrally with the rotating shaft 40. As a result, an electrical signal generated in the resolver stator 130 is transmitted to the receiver via the transmission connector 136. The receiver reads the electrical signal and calculates the rotation angle of the rotating shaft 40 based on the electrical signal. The receiver sends the calculation result to the control device 510. The control device 510 calculates the rotation speed based on this rotation angle.

In this embodiment, the resolver 132 is disposed at the protruding tip 46 exposed from the rotating electrical machine housing 14. Therefore, the resolver 132 is less susceptible to the effects of heat generated in the electromagnetic coil 110 inside the rotating electrical machine housing 14. This allows the resolver 132 to accurately calculate the rotation angle of the rotating shaft 40. In other words, the rotation angle detected by the resolver 132 is accurate. The life of the resolver 132 is also extended.

For the reasons described above, even if the diameter of the rotating shaft 40 is small, the rotational parameters of the rotating shaft 40 can be accurately calculated. This allows for the miniaturization of the rotating electric machine system 10 and the combined power system 400.

Maintenance may be required for the rotating electrical machine system 10. In this embodiment, the electrical system, including the U-phase terminal 1441, V-phase terminal 1442, W-phase terminal 1443, and the transmit connector 136 of the resolver 132, is exposed and concentrated in the second area AR2 from the fire protection member 180. Therefore, maintenance of the electrical system can be easily performed from the second area AR2.

Furthermore, when performing maintenance on the electrical system, there is no particular need to disconnect the rotating electrical machine system 10 from the gas turbine engine 200. This improves the efficiency of maintenance work.

As described above, the present embodiment provides a rotating electric machine system (10) having a rotating electric machine (12) and a rotating electric machine housing (14) that rotatably supports a rotating shaft (40) of the rotating electric machine,
the rotating shaft has a first end (441) and a second end (442), a first bearing (74) is provided between the rotating electric machine housing and the first end, and a second bearing (84) is provided between the rotating electric machine housing and the second end, so that the rotating shaft is rotatably supported by the rotating electric machine housing via the first bearing and the second bearing;
the first end includes a protruding tip (46) that passes through the first bearing and protrudes to the outside of the rotating electric machine housing,
a rotation parameter detector (132) that is provided at the protruding tip via a holding member (30) and detects a rotation parameter of the rotating shaft;
Electrical terminal portions (1441, 1442, 1443) electrically connected to the rotating electric machine;
a terminal casing (26) provided at one end of the rotary electric machine housing and accommodating the electrical terminal portion;
a fire-prevention member (180) that covers at least the one end of the rotating electric machine housing and divides the rotating electric machine housing into a first area (AR1) where the rotating electric machine housing is located and a second area (AR2) where the rotating electric machine housing is not located and is a fire-prevention area;
Equipped with
In the rotating electric machine system, when viewed from a side surface along a first direction that is an axial direction of the rotating electric machine system, the terminal casing and the rotation parameter detector are arranged side by side in parallel,
The rotating electrical machine system is disclosed in which a first insertion hole (182) is formed in the fire protection member, and the terminal casing closes the first insertion hole.

The fire-prevention member separates a first area where the rotating electrical machine housing is located from a second area where the rotating electrical machine housing is not located. Even if a spark or excessive heat occurs in the first area, the fire-prevention member blocks the spark or heat, protecting the second area from the spark or heat.

A first insertion hole is formed in the fire-resistant member. The terminal casing housing the electrical terminal is exposed to the second region through the first insertion hole. Therefore, there is no need to provide a relay connector in the fire-resistant member. This avoids an increase in the number of parts.

A terminal casing engages with the first insertion hole. In other words, most of the first insertion hole is blocked by the terminal casing. This prevents a reduction in the flame and heat blocking capabilities of the fire protection member due to the formation of the first insertion hole in the fire protection member.

Furthermore, with the above configuration, the terminal casing is prevented from protruding beyond the rotation parameter detector in the axial direction (first direction) of the rotating electric machine system. Therefore, the axial dimension of the rotating electric machine system is prevented from increasing. As a result, the rotating electric machine system can be made more compact in the axial direction. Furthermore, because the electrical terminal portion is located at one end of the rotating electric machine housing, the electrical terminal portion and the rotation parameter detector are in close proximity. This also allows for the rotating electric machine system to be made more compact in the direction perpendicular to the axial direction (second direction). Furthermore, maintenance of the electrical system is easier.

In this embodiment, the rotation parameter detector has a transmitting connector (136) for transmitting an information signal relating to the rotation parameter;
The rotating electrical machine system has a second insertion hole (184) formed in the fire protection member, and the transmitting connector closes the second insertion hole.

In this case, there is no need to provide a relay connector in the fire protection member to electrically connect the transmitting connector. This avoids an increase in the number of parts. Furthermore, because the majority of the second insertion hole is blocked by the transmitting connector, a reduction in the fire protection member's flame and heat blocking capabilities due to the formation of the second insertion hole in the fire protection member is avoided.

In this embodiment, the rotating electric machine housing includes a hollow main housing (16) having both open ends, a first sub-housing (18) that closes one open end of the main housing, and a second sub-housing (20) that closes the other open end of the main housing,
This discloses a rotating electric system in which, when a first imaginary extrapolation line (A) extending in a second direction perpendicular to the first direction is drawn from the most protruding portion (136) along the first direction at the end of the rotating electric system where the first sub-housing is provided, and a second imaginary extrapolation line (B) extending toward the first imaginary extrapolation line is drawn from the most protruding portion (1602) along the second direction in the main housing, the terminal casing is placed in a space (SP) surrounded by the first imaginary extrapolation line, the second imaginary extrapolation line, and the main housing.

In this case, when the rotating electrical machine system is viewed from the side, the terminal casing and electrical terminal portion do not protrude beyond the end of the main housing in the second direction. This prevents the rotating electrical machine system from becoming too large in size along the second direction. This allows the rotating electrical machine system to be made even more compact.

This embodiment discloses a rotating electrical machine system in which the terminal casing (26) is made of a refractory material.

In this case, even if part of the terminal casing is located in the first region, the terminal casing protects the electrical terminal portion from sparks, heat, etc.

The fire-prevention member can be wall-shaped. That is, this embodiment discloses a rotating electric machine system in which the fire-prevention member is wall-shaped.

The fire-prevention member may also be a hollow body. That is, this embodiment discloses a rotating electric machine system in which the fire-prevention member (190) is a hollow body that accommodates the rotating electric machine housing.

This embodiment discloses a combined power system (400) including a rotating electric machine system (10) configured as described above and an internal combustion engine (200). Here, the internal combustion engine has an output shaft (204) that rotates integrally with the rotating shaft of the rotating electric machine. The output shaft is connected to the second end of the rotating shaft, and the internal combustion engine is located in the first region.

As rotating electrical machine systems become smaller, combined power systems also become smaller. Furthermore, smaller combined power systems are lighter.

The present invention is not limited to the above-described embodiment, and various configurations are possible without departing from the spirit of the present invention.

The combined power system 400 can also be installed on a ship, automobile, etc. When installed on a ship, the combined power system 400 serves as a screw torque generating device. When installed on an automobile, the combined power system 400 serves as a power engine that rotates a motor. The combined power system 400 can also be used as an auxiliary power source power engine in aircraft, ships, buildings, etc. In addition, the combined power system 400 can also be used as a gas turbine power generation facility.

In this embodiment, a resolver 132 is used as the rotation parameter detector, but it is also possible to use a detector that includes a Hall element.

In FIG. 3, the rotating electric machine 12 constituting the rotating electric machine system 10 may be a motor in which the rotating shaft 40 rotates when current is applied to the electromagnetic coil 110. In this case, the U-phase terminal 1441, the V-phase terminal 1442, and the W-phase terminal 1443 are electrical terminals that receive power from the battery 146.

The rotating electrical machine system 10 can also be separated from the gas turbine engine 200 and used independently. If it is necessary to supply compressed air to the rotating electrical machine system 10, a compression pump can be provided outside the rotating electrical machine housing 14 and used as the gas supply source.

In the gas turbine engine 200, the compressor wheel 222 and turbine wheel 224 can also be arranged in the reverse order to that shown in Figure 8. In this case, a through hole 240 can be formed in the turbine wheel 224, and the compressor wheel 222 can be provided with an output shaft 204. Alternatively, the compressor wheel 222 and turbine wheel 224 can be centrifugal or axial flow types. As long as the compressor wheel 222 and turbine wheel 224 are arranged on the same axis, a multi-stage compressor wheel and multi-stage turbine wheel that combines centrifugal and axial flow types can also be used.

10...Rotating electric machine system 12...Rotating electric machine 14...Rotating electric machine housing 16...Main housing 18...First sub-housing 20...Second sub-housing 22...Storage chamber 24...Cooling jacket 26...First casing 28...Second casing 30...Resolver holder 34...Rotor 36...Stator 40...Rotating shaft 42...Inner shaft 44...Outer shaft 46...Protruding tip 56...Resolver rotor 72...Permanent magnet 74...First bearing 84...Second bearing 96...Rectifying member 110...Electromagnetic coil 130...Resolver stator 132...Resolver 136...Transmitting connector 146...Battery 148...Thermistor 149...Harness 162...Collecting flow path 164...Upstream communicating hole 166...Air relay path 172...Exhaust path 180, 190...Fire prevention member 182...First insertion hole 184...Second insertion hole 196...Communication passage 200...Gas turbine engine 202...Engine housing 204...Output shaft 210...Leg 214...Intake space 216...Bleed passage 222...Compressor wheel 224...Turbine wheel 226...Diffuser 228...Combustor 230...Nozzle 234...Bleed port 256...Ring member 400...Compound power system 422...First end of inner shaft 423...Second end of inner shaft 441...First open end of outer shaft 442...Second open end of outer shaft 500...Projectile 502...Partition wall 504...Crew compartment 506...Engine room 943...Outlet passage 1441...U-phase terminal 1442...V-phase terminal 1443...W-phase terminal

Claims (7)

A rotating electric machine system including a rotating electric machine and a rotating electric machine housing that rotatably supports a rotating shaft of the rotating electric machine,
the rotating shaft has a first end and a second end, a first bearing is provided between the rotating electric machine housing and the first end, and a second bearing is provided between the rotating electric machine housing and the second end, so that the rotating shaft is rotatably supported by the rotating electric machine housing via the first bearing and the second bearing;
the first end includes a protruding tip that passes through the first bearing and protrudes to the outside of the rotating electric machine housing,
a rotation parameter detector that is provided at the protruding tip via a holding member and detects a rotation parameter of the rotating shaft;
an electrical terminal portion electrically connected to the rotating electric machine;
a terminal casing provided at one end of the rotary electric machine housing and accommodating the electrical terminal portion;
a fire prevention member that covers at least the one end of the rotating electric machine housing and divides the rotating electric machine housing into a first area where the rotating electric machine housing is located and a second area where the rotating electric machine housing is not located and is a fire prevention area;
Equipped with
In the rotating electric machine system, when viewed from a side surface along a first direction that is an axial direction of the rotating electric machine system, the terminal casing and the rotation parameter detector are arranged side by side in parallel,
A rotating electrical system in which a first insertion hole is formed in the fireproof member, and the terminal casing closes the first insertion hole. 2. The rotating electrical machine system according to claim 1,
the rotation parameter detector has a transmitting connector for transmitting an information signal relating to the rotation parameter;
A rotating electrical system in which a second insertion hole is formed in the fire prevention member, and the transmitting connector closes the second insertion hole. 3. The rotating electrical machine system according to claim 1,
the rotating electric machine housing includes a hollow main housing having both open ends, a first sub-housing that closes one open end of the main housing, and a second sub-housing that closes the other open end of the main housing;
When a first imaginary extrapolation line is drawn extending in a second direction perpendicular to the first direction from the most protruding portion along the first direction at the end of the rotating electric system where the first sub-housing is provided, and a second imaginary extrapolation line is drawn extending from the most protruding portion along the second direction at the main housing toward the first imaginary extrapolation line, the terminal casing is arranged in a space surrounded by the first imaginary extrapolation line, the second imaginary extrapolation line, and the main housing. The rotating electrical machine system according to any one of claims 1 to 3,
A rotating electrical machine system in which the terminal casing is made of a refractory material. The rotating electrical machine system according to any one of claims 1 to 4,
A rotating electric machine system, wherein the fire-prevention member is wall-shaped. The rotating electrical machine system according to any one of claims 1 to 4,
The rotating electric machine system, wherein the fire-prevention member is a hollow body that accommodates the rotating electric machine housing. A rotating electrical machine system according to any one of claims 1 to 6;
an internal combustion engine having an output shaft that rotates integrally with the rotary shaft;
Equipped with
the output shaft is coupled to the second end of the rotating shaft;
A combined power system in which the internal combustion engine is located in the first region.