JP6611272B2 - Rotating electric machine and stator cooling structure - Google Patents

Description

  The present invention relates to a rotating electrical machine and a stator cooling structure.

  A rotating electrical machine includes a rotor and a stator, and a fully closed rotating electrical machine usually further includes a cooler. In a fully-closed rotary electric machine, a closed space is formed by a frame and a cooler cover. The cooling pipe constituting the cooler passes through this closed space, and the outside of the cooling pipe is an atmosphere of the closed space. Normally, a cooling gas such as air circulates in this closed space.

  The cooling gas cools the rotor core, the stator core, the stator winding, and the like. The cooling gas is cooled in a cooler.

  The cooler may be, for example, a system in which cooling water flows through a cooling pipe. Alternatively, in the case of a fully-enclosed external fan-shaped rotating electrical machine, an external fan is provided at one end (on the opposite side) of the rotor shaft of the rotor, and the outside air driven by the external fan extends in the axial direction of the cooler The liquid flows into the cooling pipe from one of the openings and flows out to the outside through the other opening.

JP 2013-66341 A

  As described above, the cooling gas cools the rotor core, the stator core, the stator winding, and the like and is cooled in the cooler. In particular, a stator having a large calorific value is usually provided with a plurality of ducts spaced apart from each other in the axial direction of the stator core, and cooling efficiency is increased by flowing cooling gas radially outward in the ducts.

  That is, the stator core is usually a laminated structure in which electromagnetic steel plates such as silicon steel plates having a relatively high magnetic permeability and a low price are laminated in the axial direction. In addition, a spacer is provided, a gap is formed between the laminated structures adjacent to each other to form a duct, and a flow path from the radially inner side to the radially outer side of the stator core is secured.

  Inside the stator core, the stator winding generates heat due to copper loss, that is, Joule heat, and inside the laminated structure, heat is generated due to iron loss, that is, eddy current loss or magnetic hysteresis loss. For this reason, a heat flux reaching the outer surface of the stator is generated by heat conduction. Therefore, in terms of cooling efficiency, it is preferable to increase the surface area for heat dissipation by providing many ducts.

  On the other hand, the magnetic resistance is large in a narrow space in which a duct is formed in which no magnetic steel sheet as a ferromagnetic material is present. For this reason, it is preferable that the ratio of the duct in the stator core is small in terms of electromagnetic performance such as securing of torque.

  As a method for solving such a problem, a bolt for fastening the stator core that penetrates the stator core in the axial direction is used as a perforated bolt, and the hole that penetrates in the axial direction is used as a cooling gas flow path. Thus, a method for improving the cooling capacity is known (see Patent Document 1). In this case, increasing the diameter of the perforated bolt in order to further ensure the cooling capacity is preferable in terms of the efficiency of the rotating electrical machine because there is a large diameter that becomes a magnetic resistance in the path of the lines of magnetic force. Not that.

  Therefore, an object of the present invention is to ensure cooling efficiency without greatly affecting the efficiency of the rotating electrical machine.

In order to achieve the above-described object, the present invention provides a rotor having a rotor shaft that extends in the axial direction and is rotatably supported, and a rotor iron core that is provided radially outside the rotor shaft;
Wherein provided radially outside the rotor core, wherein each of the plurality of laminated structures are arranged in the axial direction has a plurality of electromagnetic steel plates and a stator cooling structure for cooling the plurality of laminated structures plurality a cylindrical stator core having a plurality of fastening bolts to fasten the laminated structure in the axial direction of a stator having a stator winding that penetrates in the axial direction of the stator in the iron core, supporting said rotor shaft in said arranged outward in the radial direction of the stator and the frame for housing the stator and the rotor core, each of both sides of the rotor shaft of the axial direction across the rotor core A rotating electric machine comprising: a coupling-side bearing and an anti-coupling-side bearing, and an inner fan that is attached to the rotor shaft and sends a cooling gas in the direction of the stator core. And a spacer for forming each of the plurality of laminated structures sandwiched by the cooling gas radially inward from a plurality of flows radially outward duct adjacent to the axial direction, and each of the plurality of laminated structures a plurality of nuts which the shaft penetrates in the direction, is screwed into each of the plurality of cooling bolts and the plurality of cooling bolts using a material having high thermal conductivity than the material of said plurality of fastening bolts so as to contact, said plurality of arranged so as to be in close contact with each of the outer circumferential surface of the laminated structure, have a, a plurality of heat radiating plate with high material than the thermal conductivity of the plurality of fastening bolts material, the heat radiating plate Has a heat radiating area expanding member on the outer surface .

Further, the present invention comprises a rotor having a rotor shaft and a rotor core, wherein provided radially outside the rotor core, their respective plurality of which are arranged in a direction a plurality of electromagnetic steel plates a laminated structure, a cylindrical stator core having a plurality of fastening bolts to fasten the plurality of laminated structures in the axial direction, and the stator windings passing through the stator in core in the axial direction a stator having a frame for housing the stator and the rotor core, the rotor core interposed therebetween wherein the axial direction of the supporting the rotor shaft in each of opposite sides of the rotor shaft coupling-side bearing and counter a coupling-side bearing, a stator cooling structure for cooling the stator core of a rotary electric machine comprising a fan, an inner driving the cooling gas is attached to the rotor shaft, to adjacent the axial directions And a spacer for forming each of the plurality of laminated structures plurality of ducts sandwiched the flowing cooling gas from radially inner to radially outward in the axial direction so as to be in contact with each of the plurality of laminated structures A plurality of cooling bolts using a material having a higher thermal conductivity than the material of the plurality of fastening bolts, a plurality of nuts screwed into each of the plurality of cooling bolts, and the plurality of laminated structures of arranged so as to be in close contact with each of the outer peripheral surface, have a, a plurality of heat radiating plate using a material having high thermal conductivity than the material of said plurality of fastening bolts, the heat sink, the heat radiation on the outer surface It has the area expansion member .

  According to the present invention, the cooling efficiency can be ensured without greatly affecting the efficiency of the rotating electrical machine.

It is the elevation sectional view cut along the axis of rotation which shows the composition of the rotary electric machine concerning a 1st embodiment. FIG. 4 is a half longitudinal sectional view taken along the line II-II in FIG. 3 showing the configuration of the stator core of the rotating electrical machine according to the first embodiment. FIG. 3 is a half front view of the stator iron core of the rotating electrical machine according to the first embodiment, as viewed from the outside in the axial direction of FIG. 2 along the line III-III. FIG. 4 is a half sectional view taken along the line IV-IV in FIG. 2 showing the stator cooling structure of the rotating electrical machine according to the first embodiment. It is a fragmentary sectional view of the stator cut | disconnected in the orthogonal | vertical direction to the rotating shaft for demonstrating the structure of the stator cooling structure of the rotary electric machine which concerns on 1st Embodiment. It is a fragmentary sectional view of the stator along the VI-VI arrow direction of FIG. 5 for demonstrating the effect | action of the stator cooling structure of the rotary electric machine which concerns on 1st Embodiment. It is a fragmentary sectional view of the stator along the VII-VII line arrow direction of FIG. 5 for demonstrating the effect | action of the stator cooling structure of the rotary electric machine which concerns on 1st Embodiment. It is a fragmentary sectional view of the stator cut | disconnected perpendicularly to the rotating shaft for demonstrating the structure of the stator cooling structure of the rotary electric machine which concerns on 2nd Embodiment. It is a fragmentary sectional view of the stator cut | disconnected in the orthogonal | vertical direction to the rotating shaft for demonstrating the structure of the modification of the stator cooling structure of the rotary electric machine which concerns on 2nd Embodiment.

  Hereinafter, a rotating electrical machine and a stator cooling structure according to an embodiment of the present invention will be described with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

[First Embodiment]
FIG. 1 is an elevational cross-sectional view taken along a rotation axis showing the configuration of the rotating electrical machine according to the first embodiment. The rotating electrical machine 200 includes a rotor 10, a stator 20, a frame 40, and a stator cooling structure 100 (FIGS. 2 and 5).

  The rotor 10 extends horizontally in the direction of the rotation axis and is rotatably supported by the anti-coupling side bearing 30a and the coupling side bearing 30b, and the rotor core 12 provided on the radially outer side of the rotor shaft 11. Have

  At one end portion of the rotor shaft 11, a coupling portion 11a such as a flange for mechanically coupling with a coupling target such as a driving target or a prime mover is formed. Hereinafter, of the two directions parallel to the rotation axis, the direction from the rotor core 12 toward the anti-coupling side bearing 30a (the right direction in FIG. 1) is the anti-coupling side direction, and from the rotor core 12 to the coupling side bearing 30b. The direction toward the left side (the left direction in FIG. 1) is referred to as the coupling side direction.

  An inner fan 51a and an inner fan 51b are attached to the rotor shaft 11 on both outer sides in the axial direction of the rotor core 12 and inside the anti-coupling side bearing 30a and the coupling-side bearing 30b, respectively.

  The stator 20 has a cylindrical stator core 21 provided on the radially outer side of the rotor core 12 via a gap 18 that is an annulus-shaped space, and a rotational axis around the radially inner surface of the stator core 21. And stator windings 22 that penetrate in the direction and are spaced apart from each other in the circumferential direction.

  The frame 40 surrounds the outside in the radial direction so as to accommodate the stator 20 and the rotor core 12. An anti-coupling side bearing bracket 45a and a coupling-side bearing bracket 45b are provided on both sides in the rotation axis direction of the frame 40, and the anti-coupling side bearing 30a and the coupling side bearing 30b are fixedly supported.

  A cooler 60 is provided on the upper portion of the frame 40. The cooler 60 includes a plurality of cooling pipes 61, a cooler cover 63 that accommodates the cooling pipes 61, end plates 62a and 62b, and guide plates 66a and 66b. The end plates 62a and 62b are provided on both sides of the cooler cover 63 in the rotation axis direction.

  The plurality of cooling pipes 61 are arranged in parallel to each other and extend in the rotation axis direction. Each cooling pipe 61 has both ends penetrating the end plates 62a and 62b, and is fixedly supported by the end plates 62a and 62b. Both ends of each cooling pipe 61 are open.

  An outer fan 55 is provided near the end of the rotor shaft 11 in the direction opposite to the coupling side in order to cool the rotating electrical machine 200 by itself. An outer fan cover 56 is attached to the frame 40 and the end plate 62 a so as to cover the outer fan 55. The outer fan cover 56 is formed with an inlet 56a which is an intake port for outside air. The space in the outer fan cover 56 communicates with the inside of each cooling pipe 61.

  The frame 40, the anti-coupling side bearing bracket 45a, the coupling side bearing bracket 45b, the cooler cover 63, and the end plates 62a and 62b together form a closed space 40a. In the cooler 60, the cooling pipe 61 is also an element that forms the closed space 40a, and the outside of the cooling pipe 61 is a part of the closed space 40a. The space in the frame 40 constituting the closed space 40a and the space in the cooler cover 63 communicate with each other through the cooler inlet opening 64 and the cooler outlet openings 65a and 65b.

  The closed space 40a is filled with a cooling gas such as air. The cooling gas is driven by the inner fans 51a and 51b and circulates in the closed space 40a. The cooling gas driven by the inner fans 51a and 51b flows into the rotor core 12 and the stator 20 from both sides in the axial direction.

  The cooling gas that has passed through the rotor core 12 and the stator 20 and cooled them flows out into the stator core radial direction outer space 41 and flows into the cooler 60 via the cooler inlet opening 64. The cooling gas flowing into the cooler 60 passes through the outside of the cooling pipe 61 while being cooled by the outer surface of the plurality of cooling pipes 61 between the guide plate 66a and the guide plate 66b in the cooler cover 63. . Thereafter, the direction is changed in the upper communication space 67 in the cooler cover 63 to separate into two directions.

  The cooling gas whose direction is changed to the anti-coupling side direction is further changed to the lower direction and passes through the outside of the cooling pipe 61 while being cooled on the outer surfaces of the plurality of cooling pipes 61 between the guide plate 66a and the end plate 62a. Then, it flows out of the cooler 60 via the cooler outlet opening 65a. The cooling gas flowing out from the cooler 60 flows into the frame 40 and flows into the inner fan 51a.

  The cooling gas whose direction is changed in the direction of the coupling side is further changed in the downward direction and passes outside the cooling pipe 61 while being cooled on the outer surfaces of the plurality of cooling pipes 61 between the guide plate 66b and the end plate 62b. Then, it flows out of the cooler 60 through the cooler outlet opening 65b. The cooling gas flowing out from the cooler 60 flows into the frame 40 and flows into the inner fan 51b.

  2 is a half longitudinal sectional view taken along the line II-II in FIG. 3 showing the configuration of the stator core. FIG. 3 is a half front view taken along the line III-III in FIG. 2 as viewed from the axially outer side of the stator core. Both show the upper half of the stator core 21.

  The stator core 21 includes a plurality of laminated structures 23, two end clamping plates 25 sandwiching the laminated structures 23 laminated in the axial direction from both sides in the axial direction, and a plurality of clamping bolts 25. It has a fastening bolt 27 and a nut 27a, and a stator cooling structure 100. Each of the plurality of laminated structures 23 has a plurality of electromagnetic steel plates such as silicon steel plates, which are ferromagnetic materials laminated in the axial direction.

  The stator cooling structure 100 includes a plurality of cooling bolts 28 and nuts 28 a, a plurality of spacers 24 (FIG. 4) that form a duct 24 a between the laminated structures 23, and a heat sink 101 (FIG. 5). The cooling bolt 28 and the heat radiating plate 101 are made of a material having a high thermal conductivity as compared with a structural material such as a thermally good conductor such as aluminum or copper, for example, iron. In addition, illustration of the heat sink 101 is abbreviate | omitted in FIG.

  The plurality of electromagnetic steel plates constituting the laminated structure 23 by being laminated in the axial direction are each a perforated disc in which a circular opening through which the rotor 10 passes is formed in the center. The laminated structures 23 adjacent to each other form a duct 24a that is a space having a gap in the axial direction. Each duct 24 a is maintained in the axial gap dimension by the spacer 24. The duct 24a serves as a channel through which the cooling gas flowing into the gap 18 or the cooling gas flowing out in the radial direction from the rotor core 12 flows from the radially inner side to the radially outer side.

  The two end clamping plates 25 are perforated discs in which a circular opening having a diameter larger than the opening of the electromagnetic steel sheet constituting the laminated structure 23 and smaller than the outer diameter of the electromagnetic steel sheet is formed in the center. It is. Fastening bolts 27 and cooling bolts 28 are alternately passed through the end fastening plates 25 at intervals in the circumferential direction. The fastening bolts 27 and the cooling bolts 28 are in close contact with the grooves 21c along the grooves 21c (FIG. 5) that penetrate the radial surface of each laminated structure 23 in the axial direction and are spaced apart from each other in the circumferential direction. It is arranged to do.

  The plurality of fastening bolts 27 and the corresponding nuts 27a fasten the stator core 21 from both sides in the axial direction via the end fastening plates 25. Therefore, the number of bolts 27 depends on the strength of each fastening bolt 27 and the stator. It is determined in consideration of the reaction force from the iron core 21.

  As shown in FIG. 3, the fastening bolts 27 and the cooling bolts 28 are alternately arranged. However, it is not limited to this. If the strength of the end clamping plate 25 is satisfactory and dimensionally established, two or more cooling bolts 28 may be disposed between the clamping bolts 27 adjacent to each other.

  As shown in FIG. 3, as described above, the penetration positions of the fastening bolts 27 and the cooling bolts 28 are substantially the same positions as the radial outer peripheral surfaces of the laminated structure 23. . This is to prevent the stator core 21 from having as much magnetic resistance as possible, such as the tightening bolt 27 and the cooling bolt 28, in the region through which the lines of magnetic force pass. However, if there is no problem in terms of magnetic performance, it is preferable in terms of cooling performance that the cooling bolt 28 is disposed on the radially inner side of the stator core 21, which is a higher temperature region.

  On the radially inner side of the laminated structure 23, a plurality of slots 21b extending in the axial direction are formed at intervals in the circumferential direction. As a result, a plurality of teeth 21a are formed. A conductor (not shown) of the stator winding 22 is disposed in each slot 21b.

  A perforated disc-shaped end presser 26 is disposed between the outermost layer in the axial direction of the laminated structure 23 and the end tightening plate 25. The end presser 26 has a plurality of protrusions on the radially inner side, and each presses the end of the tooth 21a inward in the axial direction. Note that the end pressing member 26 may be a method in which a radially inner portion of the end pressing plate 25 is formed integrally with the end clamping plate 25.

  4 is a half sectional view taken along line IV-IV in FIG. 2 showing the stator cooling structure. The cross section cut | disconnected in the position of the duct 24a by the cross section perpendicular | vertical to an axial direction is shown. A plurality of spacers 24 extending in the radial direction and arranged radially are attached to the electromagnetic steel plates at the axial ends constituting the laminated structure 23. The angular position of each spacer in the circumferential direction is an angular position where the fastening bolt 27 is provided, and the cooling gas flows from the radially inner side to the outer side in each angular region sandwiched between them. In addition, in FIG. 4, illustration of the heat sink 101 is abbreviate | omitted.

  FIG. 5 is a partial cross-sectional view of the stator cut in the direction perpendicular to the rotation axis for explaining the configuration of the stator cooling structure.

  As described above, a plurality of grooves 21c extending in the axial direction are formed on the radial surface of the stator core 21 so as to be spaced apart in the circumferential direction. Either the fastening bolt 27 or the cooling bolt 28 is disposed on the radially outer side of the stator core 21 so as to be fitted in these grooves 21c.

  A heat radiating plate 101 is provided so that the radially outer surface of the laminated structure 23 of the stator core 21 with the fastening bolts 27 and the cooling bolts 28 attached thereto is in close contact with the circumferential direction and covers the entire circumferential direction. Yes. The heat radiating plate 101 has outer surfaces of the fastening bolts 27 and the cooling bolts 28 at locations where the laminated structure contact portions 101 a formed so as to be in close contact with the laminated structure 23, the fastening bolts 27, and the cooling bolts 28. The bolt contact portion 101b is formed so as to be in close contact with the bolt.

  The heat radiating plate 101 is molded into a shape that is in close contact with the radially outer peripheral surface of the stator core 21. The heat radiating plate 101 may be fixed in its shape, or may be in close contact with the radially outer peripheral surface of the stator core 21 using a material that is more elastic than other structural materials. Moreover, after dividing | segmenting into the circumferential direction as needed, after mounting | wearing with the outer periphery of the stator core 21 along with the circumferential direction, you may couple | bond, for example with a volt | bolt and a nut, or brazing or welding.

  FIG. 6 is a partial cross-sectional view of the stator along the VI-VI arrow direction of FIG. 5 for explaining the operation of the stator cooling structure. 7 is a partial cross-sectional view of the stator along the direction of arrows VII-VII in FIG.

  In addition, illustration of the spacer which ensures the width | variety of the axial direction of the duct 24a is abbreviate | omitted. The solid line indicates the flow direction of the cooling gas. A broken line arrow indicates a moving direction of heat generated in the stator core 21.

  A duct 24a is formed between the laminated structures 23 adjacent to each other. As shown in FIG. 6, the axial range in which the heat sink 101 is provided is a range in which the laminated structure 23 is provided in the axial direction.

  A part of the heat generated in the stator 20 is removed by the cooling gas flowing through the duct 24a, but not all the generated heat can be removed.

  In the laminated structure 23, a plurality of electromagnetic steel plates are laminated in the axial direction through, for example, an insulating film, and the heat flow is mainly the heat transfer inside each electromagnetic steel plate. In addition, a conductor for the stator winding 22 that generates Joule heat is disposed radially inward. Since it is possible to dissipate heat on the outside in the radial direction, the temperature distribution in the stator core 21 basically becomes lower as it goes outward in the radial direction. Accordingly, as indicated by the broken-line arrow H1 in FIG. 6, heat mainly moves from the radially inner side to the outer side.

  The cooling bolts 28 arranged on the outer side in the radial direction are alternately in contact with the high temperature region in contact with the laminated structure 23 and the low temperature region opened in the duct 24a in the axial direction. When a part of the heat that has moved in the direction of the broken line arrow H1 in the laminated structure 23 reaches the cooling bolt 28, the cooling bolt 28 is moved into the duct 24a as indicated by broken line arrows H2 and H3. Move to the open low temperature side.

  The heat that has moved to the low temperature side as indicated by broken line arrows H2 and H3 in the cooling bolt 28 is cooled by the cooling gas flowing in the duct 24a, respectively, and outside the stator core in the radial direction as indicated by broken line arrows H4 and H5. It is diffused into the space 41.

  Further, a part of the heat that has moved inside the laminated structure 23 in the direction of the broken line arrow H1 and reached the outer peripheral surface in the radial direction of the laminated structure 23, and the heat that has moved from the laminated structure 23 to the cooling bolt 28. A part of moves to the heat sink 101 closely_contact | adhered to each. The heat moved to the heat radiating plate 101 is dissipated from the entire circumferential direction into the stator core radial outer space 41 while spreading in the circumferential direction.

  As described above, in the stator cooling structure 100 according to the present embodiment, the cooling bolts 28 are provided on the outer surface of the stator core 21, and the radiator plate 101 is provided on the outer peripheral surface of the laminated structure 23. Thus, the removal of heat generated in the stator 20 can be promoted. As a result, the cooling efficiency can be ensured without significantly affecting the efficiency of the rotating electrical machine.

[Second Embodiment]
FIG. 8 is a partial cross-sectional view cut in the direction perpendicular to the rotation axis for explaining the configuration of the stator cooling structure of the rotating electrical machine according to the second embodiment.

  The second embodiment is a modification of the first embodiment. Like the heat sink 101 in the first embodiment, the heat sink 102 in the second embodiment has a laminated structure close contact portion 101a and a bolt close contact portion 101b. 102a. Other points are the same as those of the first embodiment.

  The fins 102a spread outward in the radial direction from the laminated structure contact portion 101a. The fins 102a may extend from the bolt contact portion 101b, or may extend from both the laminated structure contact portion 101a and the bolt contact portion 101b.

  In the example shown in FIG. 8, the fin 102 a is a member that is continuous with the laminated structure contact portion 101 a and is formed by bending outward.

  The fin 102a is not limited to this example. For example, the plate material may be bonded to either or both of the laminated structure contact portion 101a and the bolt contact portion 101b. Further, the fins 102a as the heat radiation area expanding member 103 may be two or more folds.

  FIG. 9 is a partial cross-sectional view of a stator cut in a direction perpendicular to a rotation axis for explaining a configuration of a modified example of the stator cooling structure of the rotating electrical machine according to the second embodiment. As shown in FIG. 9, as the heat radiating area expanding member 103, orthogonal plates 102b may be provided on the fins 102a so as to be orthogonal to the fins 102a at intervals from each other along the longitudinal direction of the fins 102a.

  In the present embodiment configured as described above, the removal of heat generated in the stator 20 can be further enhanced by the contribution of heat radiation from the heat radiation area expanding member 103.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, embodiment is shown as an example and is not intending limiting the range of invention. For example, in the embodiment, the case where the rotary electric machine is a horizontal type is shown, but the present invention is not limited to this, and a vertical type may be used. In the embodiment, the rotary electric machine has a fully-enclosed outer fan shape, but is not limited thereto, and may be an open type.

  Furthermore, the embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The embodiments and the modifications thereof are included in the scope of the invention and the scope of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Rotor, 11 ... Rotor shaft, 11a ... Coupling part, 12 ... Rotor core, 18 ... Gap, 20 ... Stator, 21 ... Stator core, 21a ... Teeth, 21b ... Slot, 21c ... Groove, 22 ... stator winding, 23 ... laminated structure, 24 ... spacer, 24a ... duct, 25 ... end clamping plate, 26 ... end clamp, 27 ... clamping bolt, 27a ... nut, 28 ... cooling bolt, 28a ... Nut, 30a ... anti-coupling side bearing, 30b ... coupling side bearing, 40 ... frame, 40a ... closed space, 41 ... stator core radial outer space, 45a ... anti-coupling side bearing bracket, 45b ... coupling side bearing bracket, 51a , 51b ... Inner fan, 55 ... Outer fan, 56 ... Outer fan cover, 56a ... Inlet, 60 ... Cooler, 61 ... Cooling pipe, 62a, 62b ... End plate, 63 ... Cooler cover, 64 Cooler inlet opening, 65a, 65b ... Cooler outlet opening, 66a, 66b ... Guide plate, 67 ... Upper communication space, 100 ... Stator cooling structure, 101 ... Heat sink, 101a ... Laminated structure contact portion, 101b ... Bolt Adhering portion, 102 ... Heat dissipation plate, 102a ... Fin, 102b ... Orthogonal plate, 103 ... Heat dissipation area expanding member, 200 ... Rotating electric machine

Claims (4)

A rotor shaft that extends in the axial direction and is rotatably supported; and a rotor core provided on a radially outer side of the rotor shaft;
Wherein provided radially outside the rotor core, wherein each of the plurality of laminated structures are arranged in the axial direction has a plurality of electromagnetic steel plates and a stator cooling structure for cooling the plurality of laminated structures plurality a cylindrical stator core having a plurality of fastening bolts to fasten the laminated structure in the axial direction of a stator having a stator winding that penetrates in the axial direction of the stator in the iron core,
A frame that is arranged on the outer side in the radial direction of the stator and houses the rotor core and the stator;
A coupling-side bearing and antibonding side bearing for supporting the rotor shaft in each of both sides of the rotor shaft of the axial direction across the rotor core,
An inner fan attached to the rotor shaft and sending a cooling gas in the direction of the stator core;
A rotating electric machine comprising:
The stator cooling structure is
A spacer that is sandwiched between the plurality of laminated structures adjacent to each other in the axial direction to form the plurality of ducts in which the cooling gas flows from the radially inner side to the radially outer side;
Said shaft penetrating in a direction to be in contact with each of the plurality of stacked structures, each of the plurality of cooling bolts and the plurality of cooling bolts using a material having high thermal conductivity than the material of said plurality of fastening bolts A plurality of nuts that are screwed together,
A plurality of heat sinks using a material having a higher thermal conductivity than the material of the plurality of fastening bolts, arranged so as to be in close contact with the outer peripheral surfaces of the plurality of laminated structures,
Have a,
The rotating electrical machine , wherein the heat radiating plate has a heat radiating area expanding member on an outer surface .   The rotating electrical machine according to claim 1, wherein the heat dissipating area expanding member is formed in a shape obtained by bending the heat dissipating plate. The heat dissipation area expanding member is:
Fins attached to the heat sink;
The rotating electrical machine according to claim 1, further comprising a plurality of orthogonal plates attached at intervals in a longitudinal direction of the fin. A rotor having a rotor shaft and the rotor core, disposed radially outward of the rotor core, a plurality of multilayer structures respectively are arranged in a direction a plurality of electromagnetic steel sheets its, the a stator having a cylindrical stator core having a plurality of fastening bolts for tightening a plurality of laminated structure in the axial direction, and a stator winding that passes through the stator in core in the axial direction, a frame for accommodating said stator and said rotor core, and coupled the side bearing and antibonding side bearing for supporting the rotor shaft in each of both sides of the rotor shaft of the axial direction across the rotor core, wherein A stator cooling structure for cooling the stator iron core of a rotating electrical machine comprising an inner fan attached to a rotor shaft and driving a cooling gas,
A spacer that is sandwiched between the plurality of laminated structures adjacent to each other in the axial direction to form the plurality of ducts in which the cooling gas flows from the radially inner side to the radially outer side;
Said shaft penetrating in a direction to be in contact with each of the plurality of stacked structures, each of the plurality of cooling bolts and the plurality of cooling bolts using a material having high thermal conductivity than the material of said plurality of fastening bolts A plurality of nuts that are screwed together,
A plurality of heat sinks using a material having a higher thermal conductivity than the material of the plurality of fastening bolts, arranged so as to be in close contact with the outer peripheral surfaces of the plurality of laminated structures,
Have a,
The said heat sink has a heat radiation area expansion member in an outer surface, The stator cooling structure characterized by the above-mentioned .

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