JP7705828B2 - Rotating Electric Machine - Google Patents

Description

The present invention relates to a rotating electric machine.

Conventionally, there is a rotating electric machine that includes a rotating electric machine body and a cooler that is placed on top of the rotating electric machine body to cool the rotating electric machine body. A rotating electric machine of this type is known to have a housing for the rotating electric machine body that opens upward.

JP 2017-139885 A

In rotating electrical machines, if the housing has low rigidity, there is a problem that the housing will deform due to resonance when the rotating electrical machine is started, resulting in large vibrations on the plate surface.

Therefore, one of the objectives of the present invention is to provide a rotating electric machine with a new configuration that can suppress deformation of the housing.

A rotating electric machine according to an embodiment of the present invention includes a housing having a bottom wall, two end walls extending from the bottom wall in a first direction intersecting the bottom wall and spaced apart in a second direction intersecting the first direction, and two side walls extending from the bottom wall in the first direction and spaced apart in a third direction intersecting the first direction and the second direction, the two end walls being spaced apart, the housing having a shaft that is partially housed in the housing and that is rotatably supported by the two end walls, a rotor that is housed in the housing and rotates integrally with the shaft, and a rotor that is housed in the housing, fixed to the housing, and surrounds the rotor. The housing comprises a stator, a reinforcing member that spans the two side walls and has a space therein for receiving contents that span between the two side walls, an electrical device fixed to one of the two side walls, a fluid supply unit fixed to the one of the side walls, and an instrument fixed to the other of the two side walls, wherein the contents include wiring that electrically connects the electrical device and the instrument, and piping through which fluid supplied from the fluid supply unit flows, and the wiring and the piping extend in opposite directions to each other on the outside of the one of the side walls and extend in opposite directions to each other on the outside of the other of the side walls .

According to an embodiment of the present invention, it is possible to obtain a rotating electric machine with a new configuration that can suppress deformation of the housing.

FIG. 1 is an exemplary cross-sectional view of a configuration of a totally enclosed fan-cooled rotating electric machine according to a first embodiment. FIG. 2 is an exemplary plan view of a rotating electric machine body in the totally enclosed fan-cooled rotating electric machine according to the first embodiment. FIG. 3 is an exemplary cross-sectional view of a portion including a reinforcing member in the totally enclosed fan-cooled rotating electric machine according to the first embodiment. FIG. 4 is an exemplary cross-sectional view of a mounting structure of a reinforcing member in the totally enclosed fan-cooled rotating electric machine according to the first embodiment. FIG. 5 is an exemplary perspective view of a rotating electric machine body in a totally enclosed fan-cooled rotating electric machine according to the second embodiment. FIG. 6 is an exemplary plan view of a rotating electric machine body in a totally enclosed fan-cooled rotating electric machine according to the third embodiment. FIG. 7 is an exemplary side view of a rotating electric machine body in a totally enclosed fan-cooled rotating electric machine according to the third embodiment. FIG. 8 is an exemplary rear view of a rotating electric machine body in a totally enclosed fan-cooled rotating electric machine according to the third embodiment. FIG. 9 is an exemplary cross-sectional view of a totally enclosed fan-cooled rotating electric machine according to the fourth embodiment. FIG. 10 is an exemplary cross-sectional view of a totally enclosed fan-cooled rotating electric machine according to the fifth embodiment.

Below, exemplary embodiments of the present invention are disclosed. The configurations of the embodiments shown below, and the actions and effects brought about by said configurations, are merely examples. The present invention can also be realized with configurations other than those disclosed in the following embodiments. Furthermore, according to the present invention, it is possible to obtain at least one of the various effects obtained by the configurations.

The drawings are schematic, and the dimensional relationships and ratios of each element may differ from reality. The drawings may also include parts with different dimensional relationships and ratios. In this specification, ordinal numbers are used only to distinguish between parts, members, locations, positions, directions, etc., and do not indicate order or priority.

(First embodiment)
<Configuration of totally enclosed fan-cooled rotating electric machine 1>
FIG. 1 is an exemplary cross-sectional view of a configuration of a totally enclosed fan-cooled rotating electric machine 1 according to a first embodiment.

As shown in FIG. 1, the totally enclosed fan-cooled rotating electric machine 1 includes a rotating electric machine main body 2 that rotates, and a cooler 3. Inside the totally enclosed fan-cooled rotating electric machine 1, a closed space 4 filled with a cooling gas such as air is provided between the rotating electric machine main body 2 and the cooler 3. The gas in the closed space 4 that is heated by the heat generated by the rotating electric machine main body 2 (hereinafter also referred to as the cooling gas) is heat exchanged with outside air in the cooler 3, thereby cooling the rotating electric machine main body 2. The totally enclosed fan-cooled rotating electric machine 1 is an example of a rotating electric machine. The cooling gas is an example of a gas.

<Configuration of Rotating Electric Machine Body 2>
The rotating electrical machine body 2 has a housing 11, a rotor 12, a stator 13, a shaft 14, two bearings 16, and two inner fans 18. If necessary, the number of inner fans 18 may be one.

In the following description, for convenience, three directions are defined. The X direction is along the longitudinal direction of the housing 11 and the axial direction of the central axis Ax of the rotor 12 and the shaft 14. The Y direction is along a direction perpendicular to the lateral direction of the housing 11 and the axial direction of the central axis Ax of the rotation. The Z direction is along the vertical direction of the housing 11. The X direction, Y direction, and Z direction are perpendicular to each other. Furthermore, the vertical direction of the housing 11 coincides with the vertical direction. In the following, the vertical direction refers to the vertical direction of the housing 11, i.e., the vertical direction.

The central axis of rotation Ax is the center of rotation of the shaft 14, and is, for example, a virtual line passing through the center of the rotor 12 and the shaft 14. That is, the axial, radial, and circumferential directions of the central axis of rotation Ax are the same as the axial, radial, and circumferential directions of the shaft 14. In the following description, unless otherwise specified, the axial, radial, and circumferential directions are the axial, radial, and circumferential directions of the central axis of rotation Ax, i.e., the axial, radial, and circumferential directions of the shaft 14.

Figure 2 is an exemplary plan view of the rotating electric machine body 2 in the totally enclosed fan-cooled rotating electric machine 1 of the first embodiment.

As shown in Figures 1 and 2, the housing 11 is formed in a box shape. The housing 11 houses the rotor 12, the stator 13, and a part of the shaft 14. Specifically, the housing 11 is provided with a space 4a that houses the rotor 12, the stator 13, and a part of the shaft 14. The space 4a constitutes the closed space 4.

The housing 11 has multiple walls, including a bottom wall 11a, two end walls 11c and 11d, and two side walls 11e and 11f.

The bottom wall 11a extends along a direction perpendicular to the Z direction (X-Y plane). The bottom wall 11a forms the lower end of the housing 11.

End wall 11c and end wall 11d both extend along the axial direction, i.e., along a direction perpendicular to the X direction (Y-Z plane), and are provided parallel to each other with a gap in the X direction. End wall 11c extends in the Z direction from the end of bottom wall 11a opposite the X direction, and end wall 11d extends in the Z direction from the end of bottom wall 11a in the X direction. A bearing 16 is provided on each of end wall 11c and end wall 11d.

Sidewall 11e and sidewall 11f both extend along a direction perpendicular to the axial direction, i.e., perpendicular to the Y direction (X-Z plane), and are provided parallel to each other with a gap in the Y direction. Sidewall 11e extends in the Z direction from between the Y direction ends of bottom wall 11a, and sidewall 11f extends in the Z direction from the end of bottom wall 11a on the opposite side to the Y direction.

The housing 11 is also constructed by combining multiple members. For example, the housing 11 has a frame 21 and two bearing brackets 22. The frame 21 includes a bottom wall 11a and side walls 11e and 11f. One of the bearing brackets 22 includes an end wall 11c. The other bearing bracket 22 includes an end wall 11d. The frame 21 and the two bearing brackets 22 are fixed to each other.

The housing 11 is also provided with a reinforcing member 50. The reinforcing member 50 spans the two side walls 11e, 11f and is fixed to the two side walls 11ef, 11f. The reinforcing member 50 is disposed between the two end walls 11c, 11d. For example, the reinforcing member 50 is disposed approximately in the center between the two end walls 11c, 11d. A space 51 is provided inside the reinforcing member 50. The wiring 63 and piping 66 (contained items) that span between the two side walls 11e, 11f are placed in the space 51. The wiring 63 and piping 66 are an example of contained items.

Figure 3 is an exemplary cross-sectional view of a portion including a reinforcing member 50 in a totally enclosed fan-cooled rotating electric machine 1 according to the first embodiment.

As shown in FIG. 3, the reinforcing member 50 has a bottom wall 50a and two standing walls 50c and 50d. The bottom wall 50a extends along a direction perpendicular to the Z direction (X-Y plane).

The standing walls 50c and 50d both extend along the axial direction, i.e., along a direction perpendicular to the X direction (Y-Z plane), and are provided parallel to each other with a gap in the X direction. The standing wall 50c extends in the Z direction from the end of the bottom wall 50a opposite the X direction, and the standing wall 50d extends in the Z direction from the end of the bottom wall 50a in the X direction.

A space 51 is formed by the bottom wall 50a and the vertical walls 50c and 50d. That is, the space 51 is open in the Z direction. Also, the two openings 51a in the Y direction and the opposite side of the Y direction of the space 51 face the inner surfaces of the side walls 11e and 11f, respectively. The openings 51a are also referred to as opening ends.

Flanges 52 are provided at the two ends of the reinforcing member 50 in the Y direction and the opposite direction to the Y direction.

Figure 4 is an exemplary cross-sectional view of the mounting structure of the reinforcing member 50 in the totally enclosed fan-cooled rotating electric machine 1 of the first embodiment.

The structure for fixing the reinforcing member 50 to the side wall 11e will be described with reference to FIG. 4. The structure for fixing the reinforcing member 50 to the side wall 11e is the same as the structure shown in FIG. 4. The flange 52 is fixed to the side wall 11e by a plurality of bolts 53 while overlapping the inner surface of the side wall 11e, thereby fixing the reinforcing member 50 to the side wall 11e. The side wall 11e is provided with a bottomed hole 11g, and this hole 11g is provided with a female screw portion 11h that engages with the bolt 53.

Also, as shown in FIG. 4, the side wall 11e has a hole 11i penetrating the side wall 11e. The wiring 63 and the wiring 63 pass through the hole 11i. Specifically, a sealing member 68 is fitted into the hole 11i, and the wiring 63 and the wiring 63 are fitted into a hole 68a provided in the sealing member 68.

As shown in FIG. 1, the stator 13 has a stator core 19 and a stator winding 20. The stator core 19 is formed in a generally cylindrical shape surrounding the central axis of rotation Ax. The stator winding 20 passes through slots provided in the stator core 19 and is fixed to the stator core 19. The stator 13 is fixed to the bottom wall 11a of the housing 11 via a bracket 23. The stator 13 is spaced apart from the end walls 11c, 11d and the side walls 11e, 11f.

The rotor 12 has a rotor core 15. The rotor core 15 is formed in a generally cylindrical shape surrounding the central axis of rotation Ax and is disposed inside the stator core 19.

The shaft 14 is formed in a generally cylindrical shape extending along the central axis of rotation Ax. The shaft 14 passes through the end walls 11c and 11d and extends between the inside and outside of the housing 11. The shaft 14 is supported by the bearings 16 so as to be rotatable around the central axis of rotation Ax. In other words, the shaft 14 is supported by the end walls 11c and 11d via the bearings 16 so as to be rotatable around the central axis of rotation Ax.

The shaft 14 extends axially through the inside of the stator 13 and the rotor 12. The shaft 14 is coupled to the rotor core 15 of the rotor 12. The rotor 12 and the shaft 14 can rotate together around the central axis of rotation Ax relative to the stator 13.

Both axial ends of the shaft 14 protrude from the housing 11 to the outside of the housing 11. A coupling portion 14b is provided at one axial end of the shaft 14. The coupling portion 14b is coupled to a coupling object (not shown). An outer fan 17 is fixed to the other axial end of the shaft 14. The outer fan 17 rotates integrally with the shaft 14. An inner fan 18 is fixed between each of the two bearings 16 and the rotor core 15 on the shaft 14. The inner fan 18 rotates integrally with the shaft 14.

The two bearings 16 are located on one axial side and the other axial side of the rotor 12. In other words, the rotor 12 is located between the two bearings 16. The bearings 16 are, for example, plain bearings or rolling bearings.

2, the totally enclosed fan-cooled rotating electric machine 1 further includes a terminal box 61, a sensor 62, and a fluid supply unit 65. The terminal box 61 is fixed to the outer surface of the side wall 11f. The sensor 62 penetrates the side wall 11e and is fixed to the side wall 11e. The sensor 62 is, for example, a temperature sensor that measures the temperature inside the housing 11. However, the sensor 62 is not limited to this. For example, the sensor 62 may detect the number of rotations or the rotation speed of the shaft 14. The connector in the terminal box 61 and the sensor 62 are electrically connected by a wiring 63. The terminal box 61 is an example of an electrical device, and the sensor 62 is an example of an instrument.

The fluid supply unit 65 is fixed to the outer surface of the side wall 11f. The fluid supply unit 65 supplies fluid to the pipe 66. The pipe 66 is, for example, a flexible tube. The fluid is, for example, a non-flammable purge gas. The purge gas is, for example, nitrogen or clean air. The pipe 66 penetrates the side wall 11f and the side wall 11e and extends along the outer surface of the side wall 11e. One end of the pipe 66 is connected to the inside of the housing 11.

The purge gas supplied to the pipe 66 from the fluid supply unit 65 flows through the pipe 66. That is, the fluid flows from side wall 11f to side wall 11e. The purge gas then flows into the interior of the housing 11 from one end of the pipe 66. As the purge gas flows into the interior of the housing 11, the gas in the closed space 4 is exhausted from an exhaust pipe (not shown) to the outside of the housing 11. As a result, the gas in the closed space 4 is replaced with non-flammable purge gas.

<Configuration of Cooler 3>
1 , the cooler 3 includes a heat exchanger 31, an outer fan cover 32, and an outlet guide 33. The cooler 3 cools the inside of the housing 11.

The heat exchanger 31 is disposed on the upper side of the housing 11 and is mounted on the housing 11. The heat exchanger 31 has a housing 40 and a plurality of cooling pipes 41.

The housing 40 is formed in a box shape. The housing 40 has an inlet end plate 42, an outlet end plate 43, a cooler cover 45, and a bottom plate 46. A space 4b is provided inside the housing 40. The space 4b constitutes the closed space 4.

The bottom plate 46 extends along a direction perpendicular to the Z direction (X-Y plane). The bottom plate 46 is located on the Z direction side (upper side) of the housing 11 of the rotating electric machine main body 2 and covers the inside of the housing 11, i.e., the space 4a. The bottom plate 46 is provided with, for example, two ventilation holes 46a and, for example, two ventilation holes 46b. The ventilation hole 46a is provided in the approximate center of the bottom plate 46 in the X direction and is located above the stator 13. The two ventilation holes 46a are provided with a gap in the X direction. The two ventilation holes 46b are provided with a gap in the X direction. The two ventilation holes 46b are located diagonally above the inner fan 18 in the housing 11. The ventilation hole 46a is located between the two ventilation holes 46b. Each of the ventilation holes 46a and 46b communicates with the interior of the housing 40, i.e., space 4b, and the interior of the housing 11, i.e., space 4a, and connects space 4b and space 4a. The bottom plate 46 is an example of a covering wall. The number of ventilation holes 46a and 46b is not limited to two, and may be one, three, or more.

The bottom plate 46 has an area 46c and two areas 46d. Area 46c is the portion of the bottom plate 46 between the two vents 46a. As shown in FIG. 3, area 46c is located on the Z-direction side of the space 51 and covers the space 51. Area 46d is an example of a lid portion. Area 46d is the portion of the bottom plate 46 between the vents 46a and 46b.

The inlet end plate 42 and the outlet end plate 43 both extend along the axial direction, i.e., along a direction perpendicular to the X direction (Y-Z plane), and are arranged parallel to each other with a gap in the X direction. The inlet end plate 42 extends in the Z direction from the end of the bottom plate 46 opposite the X direction, and the outlet end plate 43 extends in the Z direction from the end of the bottom wall 11a in the X direction.

The cooler cover 45 is provided across the bottom plate 46, the inlet end plate 42, and the outlet end plate 43.

The cooling pipes 41 are arranged in parallel to one another. The cooling pipes 41 are provided across the inlet end plate 42 and the outlet end plate 43, and both ends of the cooling pipes 41 are supported by the inlet end plate 42 and the outlet end plate 43.

Two guide plates 44 are provided inside the cooler cover 45. The two guide plates 44 are arranged at a distance from each other in the X direction between the inlet end plate 42 and the outlet end plate 43. The two guide plates 44 extend upward from the bottom of the space 4b of the housing 40 so as to exclude the upper communication space 4c, and divide the space 4b of the cooler cover 45 in the X direction, excluding the upper communication space 4c.

The external fan cover 32 is fixed to the inlet end plate 42 and houses the external fan 17. The external fan cover 32 is provided with an inlet 37, and as the external fan 17 rotates, external air flows into the external fan cover 32 from the inlet 37. The external fan cover 32 is also connected to the inlet end plate 42 so that the external air flowing into the external fan cover 32 by the external fan 17 flows inside the multiple cooling tubes 41. A guide member 49 is also provided inside the external fan cover 32 to guide the external air that flows into the external fan cover 32 from the inlet 37 so that it passes through the external fan 17 and flows into the multiple cooling tubes 41.

The outlet guide 33 is fixed to the outlet end plate 43. The outlet guide 33 guides the outside air flowing out of the multiple cooling tubes 41 so that it flows in a predetermined direction.

<Gas flow in totally enclosed fan-cooled rotating electric machine 1>
Next, the flow of gas in the totally enclosed fan-cooled rotating electric machine 1 having the above configuration will be described.

First, the cooling gas in the closed space 4 will be described. The cooling gas in the space 4a in the housing 11 in the closed space 4 shown in FIG. 1 is sent to the rotor 12 and the stator 13 by two internal fans 18 that rotate together with the shaft 14. The cooling gas flows along the rotor 12 and the stator 13 to cool the rotor 12 and the stator 13, and then flows out radially outward from the stator core 19. At this time, the gas passes through the ventilation passages provided in the rotor 12 and the stator 13. The gas that flows out radially outward from the stator core 19 flows into the space 4b in the cooler 3 via the ventilation port 46a. In the process of passing outside the cooling pipe 41, the gas that flows into the space 4b of the cooler 3 exchanges heat with the outside air flowing in the cooling pipe 41 and is cooled, and rises between the two guide plates 44 and flows out into the upper communication space 4c.

The cooling gas in the upper communication space 4c branches off in opposite directions along the axial direction of the cooling pipe 41, and flows down between the inlet end plate 42 and the guide plate 44, and between the outlet end plate 43 and the guide plate 44, while being cooled by heat exchange with the outside air inside the cooling pipe 41. The cooling gas then returns to the space 4a inside the housing 11 through the vent 46b, and flows back into the internal fans 18.

Next, the outside air will be described. The outside air flows into the outside fan cover 32 from the suction port 37 by the outside fan 17 that rotates together with the shaft 14, passes through the inside of the outside fan cover 32, and reaches the inlet end plate 42. The outside air that reaches the inlet end plate 42 flows into each cooling pipe 41 that opens at the inlet end plate 42, receives heat from the cooling gas outside the cooling pipe 41 in the cooling pipe 41, passes through the cooling pipe 41 while increasing in temperature, and then flows out of the cooler 3 from the opening at the outlet end plate 43. In this way, heat is exchanged between the outside air inside the cooling pipe 41 and the cooling gas outside the cooling pipe 41, thereby cooling the rotor 12 and the stator 13.

<Method of assembling and disassembling totally enclosed fan-cooled rotating electric machine 1>
In assembling the totally enclosed fan-cooled rotating electric machine 1, the stator core 19 and the stator 13 are inserted into the frame 21 from above the frame 21 in the housing 11 and attached to the frame 21. Next, the shaft 14 to which the rotor core 15 (rotor 12) has been attached in advance is inserted into the frame 21 through the bearing hole in the end wall 11c or 11d, and the shaft 14 is attached to the end walls 11c and 11d via the bearing 16. As a result, the shaft 14 is supported by the end walls 11c and 11d via the bearing 16. After that, the reinforcing member 50 is attached to the frame 21, and the wiring 63 and the piping 66 are laid in the space 51. After that, the bottom plate 46 of the cooler 3 is attached to the housing 11, and the heat exchanger 31 of the cooler 3 is fixed to the bottom plate 46 by stacking it from above. Alternatively, the heat exchanger 31 integrated with the bottom plate 46 is fixed to the rotating electric machine main body 2 by stacking it from above. The fixing is performed by, for example, bolts etc. After that, the outer fan cover 32 and the outlet guide 33 are fixed to the heat exchanger 31 by bolts etc. As a result, the space 51 of the reinforcing member 50 is covered and closed by the region 46c of the bottom plate 46.

On the other hand, when disassembling the totally enclosed fan-cooled rotating electric machine 1, the fan-cooled cover 32 and the outlet guide 33 are removed from the heat exchanger 31, and then the heat exchanger 31 is removed from the rotating electric machine body 2. This opens the space 51 in the reinforcing member 50 upward. After that, the totally enclosed fan-cooled rotating electric machine 1 can be disassembled by removing each component described in the assembly in the reverse order of the assembly.

Effects of the embodiment
As described above, the totally enclosed fan-cooled rotating electric machine 1 (rotating electric machine) of this embodiment includes the housing 11, the shaft 14, the rotor 12, the stator 13, and the reinforcing member 50. The housing 11 has a bottom wall 11a, two end walls 11c, 11d, and two side walls 11e, 11f. The two end walls 11c, 11d extend from the bottom wall 11a in the Z direction (first direction) intersecting (for example, perpendicular to) the bottom wall 11a, and are arranged at an interval in the X direction (second direction) intersecting the Z direction. The two side walls 11e, 11f extend from the bottom wall 11a in the Z direction, and are arranged at an interval in the Y direction (third direction) intersecting the Z direction and the X direction, spanning the two end walls 11c, 11d. The shaft 14 spans the two end walls 11c, 11d, and is partially housed in the housing 11, and is rotatably supported by the two end walls 11c, 11d. The rotor 12 is housed in the housing 11 and rotates integrally with the shaft 14. The stator 13 is housed in the housing 11 and fixed to the bottom wall 11a of the housing 11, surrounding the rotor 12. The reinforcing member 50 spans the two side walls 11e, 11f. A space 51 is provided inside the reinforcing member 50. The space 51 accommodates wiring 63 and piping 66 (contained items) that span between the two side walls 11e, 11f.

According to this configuration, the housing 11 is reinforced by the reinforcing member 50, so that the rigidity of the housing 11 can be improved. Therefore, according to this embodiment, it is possible to suppress deformation and vibration of the side of the housing 11 due to resonance when the totally enclosed fan-cooled rotating electric machine 1 is started. Specifically, the reinforcing member 50 can suppress deformation and vibration amplitude of the housing 11 that increases the distance between the side walls 11e and 11f. In addition, a space 51 for objects to be placed inside the reinforcing member 50 is provided, and the reinforcing member 50 also serves as a container, so that the configuration of the totally enclosed fan-cooled rotating electric machine 1 can be simplified compared to a configuration in which these are provided separately.

The totally enclosed fan-cooled rotating electric machine 1 also includes a heat exchanger 31 (cooling section). The heat exchanger 31 has a bottom plate 46 (covering wall) located on the Z direction side of the housing 11 and covering the inside of the housing 11, and cools the inside of the housing 11. The space 51 is open in the Z direction. The bottom plate 46 (covering wall) has an area 46c (lid section) located on the Z direction side of the space 51 and covering the space 51.

With this configuration, by removing the heat exchanger 31 from the housing 11, the space 51 of the reinforcing member 50 is opened upward, making it easy to perform maintenance inside the reinforcing member 50. Furthermore, since the reinforcing member 50 is also removable, the stator 13 can also be replaced or maintained.

The reinforcing member 50 is located approximately in the center between the two end walls 11c and 11d.

This configuration can further prevent the gap between side walls 11e and 11f from becoming too large.

The contents are at least one of wiring 63 and piping 66 (for example, both).

According to this configuration, the wiring 63 and the piping 66 extending between the side walls 11e and 11f can be protected by the reinforcing member 50. Note that the contents may be only the wiring 63, or
Only the pipe 66 may be used.

Second Embodiment
FIG. 5 is an exemplary perspective view of a rotating electric machine body in a totally enclosed fan-cooled rotating electric machine 1 according to the second embodiment.

As shown in FIG. 5, the reinforcing member 50 of this embodiment is different from that of the first embodiment. The reinforcing member 50 of this embodiment has a base portion 51e and protruding portions 51g and 51f. The base portion 51e spans between the two side walls 11e and 11f on the upper side between the two side walls 11e and 11f. The protruding portions 51g and 51f protrude from both ends of the base portion 51e in opposite directions in the Z direction along the outer surfaces of the side walls 11e and 11f. Furthermore, as in the first embodiment, a space 51 is provided inside the reinforcing member 50, and wiring 63 and piping 66 can be provided in the space 51.

Third Embodiment
Fig. 6 is an exemplary plan view of a rotating electric machine body in the totally enclosed fan-cooled rotating electric machine 1 according to the third embodiment. Fig. 7 is an exemplary side view of the rotating electric machine body in the totally enclosed fan-cooled rotating electric machine 1 according to the third embodiment. Fig. 8 is an exemplary rear view of the rotating electric machine body in the totally enclosed fan-cooled rotating electric machine 1 according to the third embodiment.

As shown in Figures 6 to 8, this embodiment differs from the first embodiment in the reinforcing member 50. The reinforcing member 50 of this embodiment has two inclined portions 51h, 51i. The inclined portion 51h extends between the inclined portion 51h and the end wall 11d, and the inclined portion 51i extends between the side wall 11f and the end wall 11d. The inclined portions 51h, 51i are inclined with respect to the X direction and approach each other as they move in the X direction. The inclined portions 51h, 51i are connected to each other at the end wall 11d. Furthermore, as in the first embodiment, a space 51 is provided inside the reinforcing member 50, and wiring 63 and piping 66 can be provided in the space 51.

This configuration makes it possible to prevent the gap between the reinforcing member 50 and the upper end (top) of the stator core 19 of the stator 13 from becoming narrow.

(Fourth embodiment)
FIG. 9 is an exemplary cross-sectional view of a configuration of a totally enclosed fan-cooled rotating electric machine 1 according to the fourth embodiment.

This embodiment differs from the first embodiment in that multiple reinforcing members 50 (three as an example) are provided. The multiple reinforcing members 50 are arranged parallel to each other at intervals in the X direction. Each reinforcing member 50 spans two side walls 11e and 11f.

With this configuration, multiple reinforcing members 50 are provided, which further suppresses deformation of the housing 11.

Fifth Embodiment
FIG. 10 is an exemplary cross-sectional view of a configuration of a totally enclosed fan-cooled rotating electric machine 1 according to the fifth embodiment.

In this embodiment, the reinforcing member 50 is different from that in the first embodiment. The reinforcing member 50 in this embodiment is a pipe. The pipe is, for example, a metal pipe. Similar to the pipe 66 in the first embodiment, the reinforcing member 50 has a purge gas passing through it. Therefore, the reinforcing member 50 can also be called a duct. The purge gas is an example of a fluid that flows between the two side walls 11e, 11f. The fluid may be a liquid.

With this configuration, the reinforcing member 50 is a pipe, so the configuration of the totally enclosed fan-cooled rotating electric machine 1 can be simplified compared to a configuration in which the reinforcing member 50 and the pipe are provided separately.

In the first to fourth embodiments, the piping 66 in the space 51 may be eliminated, and the purge gas may be directly fed into the space 51. In that case, flexible tubes or other piping are laid and fixed between the fluid supply unit 65 and the space 51 of the reinforcing member 50, and between the area inside the housing 11 that requires the purge gas and the space 51 of the reinforcing member 50.

In addition, in each of the above embodiments, the heat exchanger 31 is shown as an example of a cooling unit, but the cooling unit is not limited to this. For example, the cooling unit may be an air duct that can cool the inside of the housing 11 by ventilating the inside of the housing 11.

In addition, in each of the above embodiments, an example is shown in which the flange 52 is provided on the inner surface of the housing 11, but this is not limiting. For example, the flange 52 may be provided on the outer surface of the housing 11.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims.

1... totally enclosed fan-cooled rotating electric machine (rotating electric machine), 11... housing, 11a... bottom wall, 11c, 11d... end wall, 11e, 11f... side wall, 12... rotor, 13... stator, 14... shaft, 31... heat exchanger (cooling section), 46... bottom plate (covering wall), 46c... area (lid section), 50... reinforcing member, 51... space, 61... terminal box (electrical equipment), 62... sensor (instrument), 63... wiring (contained item), 65... fluid supply section, 66... piping (contained item).

Claims (3)

a housing having a bottom wall, two end walls extending from the bottom wall in a first direction intersecting the bottom wall and spaced apart in a second direction intersecting the first direction, and two side walls extending from the bottom wall in the first direction and spaced apart in a third direction intersecting the first direction and the second direction, the two side walls spanning the two end walls;
a shaft that is partially accommodated in the housing and that is rotatably supported by the two end walls and that spans the two end walls;
a rotor housed in the housing and rotating integrally with the shaft;
a stator housed in the housing, fixed to the housing, and surrounding the rotor;
A reinforcing member having a space therein for receiving an object extending across the two side walls and between the two side walls;
an electrical device fixed to one of the two side walls;
a fluid supply portion fixed to the one of the side walls;
a meter fixed to the other of the two side walls;
Equipped with
The container is
Wiring electrically connecting the electrical device and the meter;
A pipe through which the fluid supplied from the fluid supply unit flows;
Including,
The wiring and the piping extend in opposite directions from each other outside the one side wall and also extend in opposite directions from each other outside the other side wall.
Rotating electric motor. a cooling unit that is located on the first direction side of the housing, has a cover wall that covers an inside of the housing, and cools the inside of the housing;
The space is open in the first direction,
The covering wall has a lid portion located on the first direction side with respect to the space and covering the space.
The rotating electric machine according to claim 1 . The reinforcing member is disposed in a central portion between the two end walls.
The rotating electric machine according to claim 1 .

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