JP2020145785A - Rotary electric machine and assembly method for rotary electric machine - Google Patents

Abstract

To efficiently perform cooling in a rotary electric machine having a duct disposed in a core thereof.SOLUTION: A rotary electric machine 100 includes a rotor 10 having a rotor shaft 11 and a rotor core 12 in which an axial flow channel 12a and a plurality of rotor core ducts 12d are formed, a stator 20 having a stator core 21 which is disposed with a gap 18 from the rotor core 12 and in which a plurality of stator core ducts 21d are formed and a stator winding 22 including a stator winding conductor extending through a plurality of stator slots, a frame 40, coupling-side and non coupling-side bearings 30a, 30b, coupling-side and non coupling-side bearing brackets 45a, 45b, and an outdoor-air supply device 50. The rotor core 12 has an axial flow channel closing plate 12p for closing an end, of the axial flow channel 12a, opposed to an outlet space 40v. The frame 40 has a stator closing plate 40c for closing an end, of an annular flow channel 40f between the stator core 21 and the frame 40, opposed to an inlet space 40w.SELECTED DRAWING: Figure 1

Description

The present invention relates to a rotary electric machine and a method of assembling the rotary electric machine.

The rotary electric machine includes a rotor having a rotor shaft and a rotor core, and a stator. Normally, the rotor core and the stator are housed in a frame.

During the operation of the rotary electric machine, heat is generated in the rotor and the stator due to copper loss and iron loss. Various insulating materials are used for electrical insulation between each element of the rotor and stator. In order to maintain the integrity of the insulation, these temperatures need to be kept below a predetermined level, which requires the removal of heat from the rotor and stator.

Japanese Unexamined Patent Publication No. 2003-79099

If the rotating machine does not need to be fully closed, outside air can be used to cool the rotor and stator.

For example, a method is known in which an outside air intake is provided at one end of the frame, the outside air is taken into the frame by an internal fan attached to the rotor shaft, and the rotor core and stator are passed in one direction for cooling. (See Patent Document 1).

When the heat generated by the iron loss in the rotor core and the stator core becomes large, in order to efficiently remove this, a plurality of ducts, that is, radial outwards, are spaced apart from each other in the axial direction in each core. A method of forming a road is known. In the case of such a method, it is inconsistent with the method of flowing outside air in one direction.

Further, for example, in the case of a variable speed rotary electric machine, the rotation speed of the inner fan changes depending on the rotation speed of the rotor shaft, but the amount of heat generated in the frame may not always be proportional to the rotation speed. In such a case, an external fan cooling system in which the drive source is separated is often used.

As described above, including the case of the external fan cooling method, it is necessary to have a configuration for efficient cooling in the rotary electric machine provided with the duct in the iron core.

Therefore, an object of the present invention is to efficiently perform cooling in a rotary electric machine in which a duct is provided in an iron core.

In order to achieve the above object, the rotary electric machine according to the present invention has a rotor shaft extending in the rotation axis direction and rotatably supported, and an axial flow provided on the radial outer side of the rotor shaft and penetrating in the axial direction. A rotor having a rotor core formed with a plurality of rotor core ducts formed in the path and axially spaced apart from each other to form a flow path from the axial flow path to the outside in the radial direction, and the rotation. Cylindrical fixation in which a plurality of stator core ducts are formed on the radial outer side of the rotor core via a gap and formed at intervals in the axial direction to form a flow path from the gap to the radial outer side. It has a rotor core and a stator winding including a stator winding conductor penetrating in a plurality of stator slots arranged radially inside the stator core at intervals in the circumferential direction and penetrating in the axial direction. A stator, an intake port arranged so as to cover the radial direction of the stator and an intake port for taking in outside air, and an exhaust port arranged on the opposite side in the axial direction across the stator and discharging the taken in outside air are formed. The tubular frame, the coupling side bearing and the anti-coupling side bearing that support the rotor shaft on both sides in the rotation axis direction with the rotor core in between, and the coupling side bearing and the anti-coupling side bearing, respectively. A machine body space that is fixedly supported and has an inlet space that is a portion that flows in from the intake port and an outlet space that is a portion that flows out to the exhaust port together with the frame is formed and serves as a flow path for outside air, and the rotation of the frame. A coupling side bearing bracket and an anti-coupling side bearing bracket connected to both sides in the axial direction, and an outside air supply device for supplying outside air into the frame are provided, and the rotor core is the outlet space of the axial flow path. It has an axial flow path closing plate that closes the end facing the frame, and the frame is a stator closing plate that closes the end of the annular flow path between the stator core and the frame facing the inlet space. It is characterized by having.

Further, the method for assembling a rotary electric machine according to the present invention is a method for assembling a rotary electric machine in which the rotor core has an axial flow path closing plate and the frame has a stator closing plate, and the above-mentioned is formed on the inner surface of the frame. After the rotor closing plate mounting step for mounting the rotor closing plate, the anti-coupling side bearing bracket mounting step for mounting the anti-coupling side bearing bracket after the stator closing plate mounting step, and the anti-coupling side bearing bracket mounting step. After attaching the rotor core to the rotor shaft in parallel with the stator mounting step for attaching the stator to the frame and the stator closing plate mounting step or the stator mounting step, in the outlet space of the axial flow path. After the axial flow path closing plate mounting step for attaching the axial flow path closing plate to the facing end and the coupling side bearing and the coupling side bearing bracket for mounting the coupling side bearing bracket after the axial flow path closing plate mounting step. It is characterized by having a bracket mounting step, and a rotor inserting step for inserting a rotor into the stator after the stator mounting step and the coupling side bearing bracket mounting step.

According to the present invention, it is possible to efficiently perform cooling in a rotary electric machine provided with a duct in the iron core.

It is a vertical sectional view which shows the structure of the rotary electric machine which concerns on 1st Embodiment. It is a flow figure which shows the procedure of the assembly method of the rotary electric machine which concerns on 1st Embodiment. It is a vertical cross-sectional view which shows the attachment stage of the stator closing plate in the assembly method of the rotary electric machine which concerns on 1st Embodiment. It is a vertical cross-sectional view which shows the attachment stage of the antibonding side bearing bracket in the assembly method of the rotary electric machine which concerns on 1st Embodiment. It is a vertical sectional view which shows the mounting stage of the stator in the assembling method of the rotary electric machine which concerns on 1st Embodiment. It is a vertical cross-sectional view which shows the state which the rotor is being inserted in the assembly method of the rotary electric machine which concerns on 1st Embodiment. It is a vertical cross-sectional view which shows the state after mounting the rotor in the assembling method of the rotary electric machine which concerns on 1st Embodiment. It is a conceptual vertical sectional view which shows the flow of the outside air in the main body of the rotary electric machine which concerns on 1st Embodiment. It is a vertical sectional view which shows the structure of the rotary electric machine which concerns on 2nd Embodiment. It is sectional drawing which shows the structure of the stator core end part of the rotary electric machine which concerns on 2nd Embodiment. FIG. 9 is a cross-sectional view taken along the line XI-XI of FIG. 9 showing the configuration of the stator core end portion of the rotary electric machine according to the second embodiment. It is a partial cross-sectional view which shows the detail of the YY part of FIG. 11 which shows the structure of the stator core end part of the rotary electric machine which concerns on 2nd Embodiment. It is a cross-sectional view of the XIII-XIII line arrow view of FIG. 12 showing the details of the YY portion of FIG. 11 showing the configuration of the stator core end portion of the rotary electric machine according to the second embodiment. It is a vertical sectional view which shows the structure of the rotary electric machine which concerns on 3rd Embodiment.

Hereinafter, the rotary electric machine and the method of assembling the rotary electric machine according to the embodiment of the present invention will be described with reference to the drawings. Here, parts that are the same as or similar to each other are designated by a common reference numeral, and duplicate description will be omitted.

[First Embodiment]
FIG. 1 is a vertical sectional view showing a configuration of a rotary electric machine according to the first embodiment. The rotary electric machine 100 has a main body 1 and an outside air supply device 50.

The main body 1 has a rotor 10, a stator 20, a bonding side bearing 30a, an antibonding side bearing 30b, and a frame 40.

The rotor 10 has a rotor shaft 11 extending in the rotation axis direction and a cylindrical rotor core 12 attached to the radial outer side of the rotor shaft 11. A coupling portion 11a for coupling with the coupling target is formed at one end of the rotor shaft 11. Hereinafter, the bonding portion 11a side is referred to as a bonding side, and the side opposite to this is referred to as an antibonding side. The rotor core 12 is formed with an axial flow path 12a penetrating in the axial direction. Further, the rotor core 12 is formed with a plurality of rotor core ducts 12d communicating with each other from the axial flow path 12a in the radial direction of the rotor core 12 at intervals in the axial direction. The end of the axial flow path 12a on the coupling side is closed by the axial flow path closing plate 12p.

The stator 20 has a stator core 21 and a stator winding 22. The stator core 21 has a cylindrical shape, and is provided on the radial outer side of the rotor core 12 via a gap 18. A plurality of stator core ducts 21d are formed in the stator core 21 so as to communicate with each other from the gap 18 in the radial direction of the stator core 21 at intervals in the axial direction. The stator winding 22 penetrates the stator core 21 in the axial direction.

The frame 40 has a tubular shape and is provided so as to surround the radially outer side of the stator 20. The frame 40 has an annular plate attached to both ends thereof. The coupling side end opening 40h formed in the annular plate on the coupling side has a diameter through which the stator 20 can pass.

A bonding side bearing bracket 45a and an antibonding side bearing bracket 45b are attached to both end portions of the ram 40, respectively. The bonding side bearing bracket 45a and the antibonding side bearing bracket 45b statically support the bonding side bearing 30a and the antibonding side bearing 30b, respectively. The bonding side bearing 30a and the antibonding side bearing 30b rotatably support the rotor shaft 11 on both sides of the rotor core 12 in the axial direction.

There is a gap between the radial outer surface of the stator core 21 and the inner surface of the frame 40, and an annular flow path 40f extending in the axial direction is formed. The end of the annular flow path 40f on the antibonding side is closed by a stator closing plate 40c attached to the inner surface of the frame 40.

The frame 40 is formed with an intake port 40p and an exhaust port 40q. The intake port 40p is formed on the antibonding side of the stator 20. Further, the exhaust port 40q is formed in a portion on the coupling side with respect to the stator 20. The intake port 40p and the exhaust port 40q are located substantially opposite to each other with respect to the rotation axis in the circumferential direction.

The in-flight space 40a surrounded by the frame 40, the coupling side bearing bracket 45a and the anti-coupling side bearing bracket 45b is an inlet space 40w which is upstream of the rotor core 12 and the stator 20 and communicates with the intake port 40p, and a rotor. It has an outlet space 40v which is on the downstream side of the iron core 12 and the stator 20 and communicates with the exhaust port 40q.

The outside air supply device 50 has an external fan 51, a drive unit 52, and a fan cover 53. The external fan 51 is an axial fan, and is rotated by a drive unit 52 such as an electric motor. The external fan 51 is housed in the fan cover 53. The drive unit 52 is statically supported by the fan cover 53. The fan cover 53 is attached to the frame 40, and an inflow port 56 and an air supply port 57 are formed. The inflow port 56 is formed on the suction side of the fan 51, and the air supply port 57 is formed on the discharge side of the fan 51. The air supply port 57 is adjacent to the intake port 40p of the frame 40, and the space inside the fan cover 53 and the in-flight space 40a inside the frame 40 communicate with each other.

FIG. 2 is a flow diagram showing the procedure of the method of assembling the rotary electric machine according to the first embodiment. Hereinafter, each step will be described with reference to the figure.

FIG. 3 is a vertical cross-sectional view showing the mounting stage of the stator closing plate in the method of assembling the rotary electric machine according to the first embodiment. First, as shown in FIG. 3, the bonding side bearing bracket 45a (FIG. 1) and the antibonding side bearing bracket 45b are not attached to the frame 40, and the outside air supply device 50 is not attached.

In this state, the stator closing plate 40c is attached to the inner surface of the frame 40 (step S01). Since the annular stator closing plate 40c cannot be brought into the frame 40, for example, it can be split into half pieces, brought in, and then attached to the inner surface of the frame 40.

The joint-side end opening 40h in which the joint-side end plate of the frame 40 is formed has a size that allows the stator 20 to pass through in the later step S03.

Next, as shown in FIG. 4, the antibonding side bearing bracket 45b is attached to the frame 40 (step S02). FIG. 4 is a vertical cross-sectional view showing an attachment stage of the antibonding bearing bracket in the method of assembling the rotary electric machine according to the first embodiment.

Next, as shown in FIG. 5, the stator 20 is mounted in the frame 40 so that the end portion of the stator core 21 is in close contact with the stator closing plate 40c (step S03). FIG. 5 is a vertical cross-sectional view showing the mounting stage of the stator in the method of assembling the rotary electric machine according to the first embodiment.

On the other hand, in parallel with the steps from step S01 to step S03, the rotor 10 is assembled by the next steps S04 to S06.

First, the rotor core 12 is attached to the rotor shaft 11 (step S04). Next, the axial flow path closing plate 12p (FIG. 1) is attached to the end of the rotor core 12 on the coupling side (step S05).

Next, the antibonding side bearing 30b, the bonding side bearing 30a, the bonding side bearing bracket 45a, and the axial flow path closing plate 12p are attached to the rotor 10 (step S06). The antibonding bearing 30b may interfere with the insertion of the rotor 10 into the stator 20 in step S07, which will be described later. In this case, the antibonding side bearing 30b is not attached to the rotor shaft 11 at this stage, but is attached after step S07.

The context of steps S04 to S06 does not matter in relation to steps S01 to S03.

Next, the rotor 10 is inserted into the stator 20 in a state where the rotor 10, the anti-coupling side bearing 30b, the coupling side bearing 30a, the coupling side bearing bracket 45a, and the axial flow path closing plate 12p are integrated ( Step S07). FIG. 6 is a vertical cross-sectional view showing a state in which a rotor is being inserted in the method of assembling a rotary electric machine according to the first embodiment.

Next, the rotor 10, the antibonding side bearing 30b, the bonding side bearing 30a, the bonding side bearing bracket 45a, and the axial flow path closing plate 12p are integrally attached, and these are attached in a normal state.

FIG. 7 is a vertical cross-sectional view showing a state after mounting the rotor in the method of assembling the rotary electric machine according to the first embodiment. Here, the antibonding side bearing 30b is in a state of being supported by the antibonding side bearing bracket 45b attached to the frame 40. Further, the coupling side bearing bracket 45a is attached to the frame 40.

Next, the outside air supply device 50 is attached to the main body 1 (step S08).

Next, the operation of the rotary electric machine 100 according to the first embodiment will be described.

FIG. 8 is a conceptual vertical sectional view showing the flow of outside air in the main body of the rotary electric machine according to the first embodiment. In the operating state of the rotary electric machine 100, the outside air supply device 50 is also operated, and the external fan 51 is rotated by the drive device. The outside air flows into the fan cover 53 from the inflow port 56 of the fan cover 53, flows out from the air supply port 57, and enters from the intake port 40p of the frame 40 to the inlet that is the antibonding side portion of the cabin space 40a in the frame 40. It flows into the space 40w.

The outside air flowing into the inlet space 40w has a stator closing plate 40c provided at the inlet of the annular flow path 40f on the outer side in the radial direction of the stator 20, so that the axial flow path 12a formed in the rotor 10 is provided. , And into any of the voids 18 between the rotor core 12 and the stator core 21.

The outside air flowing into the axial flow path 12a formed in the rotor 10 flows through the axial flow path 12a from the antibonding side toward the bonding side, and sequentially flows into the rotor core duct 12d. Since the end portion of the axial flow path 12a on the coupling side is closed by the axial flow path closing plate 12p as described above, the outside air flowing into the axial flow path 12a is discharged from the rotor core duct 12d. Does not flow directly into the exit space 40v without flowing.

The outside air that has flowed into the rotor core duct 12d from the axial flow path 12a flows out into the gap 18 between the rotor core 12 and the stator core 21.

The outside air flowing out into the gap 18 flows into the inlet space 40w in the frame 40 and mixes with the outside air directly flowing into the gap 18, and a plurality of stator core ducts 21d formed in the stator core 21 from the gap 18 Inflow into each of.

The outside air that has flowed into the stator core duct 21d flows outward in the radial direction and flows out to the annular flow path 40f on the radial outer side of the stator core 21. The outside air that has flowed into the annular flow path 40f flows axially toward the coupling side, and flows out from the annular flow path 40f to the outlet space 40v, which is a portion of the cabin space 40a on the coupling side.

The outside air flowing out from the annular flow path 40f to the outlet space 40v merges with each other and flows out from the in-flight space 40a to the outside of the main body 1 via the exhaust port 40q.

As described above, in the present embodiment, the outside air flows out to the outside after widely cooling each part of the rotor core 12 and each part of the stator core 21.

[Second Embodiment]
The second embodiment is a modification of the first embodiment. The rotary electric machine 100a according to the second embodiment has a gap end outflow suppressing plate 24 that suppresses the outflow of outside air from the downstream end of the gap 18 which is an annular space. Other than this, it is the same as that of the first embodiment.

FIG. 9 is a vertical cross-sectional view showing the configuration of the rotary electric machine according to the second embodiment. FIG. 10 is a cross-sectional view showing the configuration of the stator core end portion of the rotary electric machine according to the present embodiment, and FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. FIG. 10 is a cross-sectional view of the inside of the void end outflow control plate 24 in the axial direction, and FIG. 11 is a cross-sectional view including the void end outflow control plate 24.

As shown in FIG. 10, at the end of the stator 20, the stator winding conductor 22a of the stator winding 22 is axially outside from the axial end of the stator slot 21a formed in the stator core 21. It protrudes into. In order to prevent the stator winding conductor 22a from protruding inward in the radial direction, the plate-shaped winding conductor holding wedge 21t provided at the opening in the direction of the gap 18 of the stator slot 21a and extending in the axial direction also has a stator core. It protrudes outward in the axial direction from the axial end of 21.

As shown in FIG. 11, the void end outflow suppression plate 24 is an annular plate and has irregularities on the outer side in the radial direction. The gap end outflow suppression plate 24 is formed so as to cover the gap 18 (FIG. 10) between the rotor core 12 and the stator core 21 when viewed from the axial direction.

FIG. 12 is a partial cross-sectional view showing the details of the YY portion of FIG. 11 showing the configuration of the stator core end portion, and FIG. 13 is a partial cross-sectional view taken along the line XIII-XIII of FIG.

The void end outflow suppression plate 24 has an annular portion 24a, a fixing portion 24b, and an annular seal member 24c (FIG. 13).

The annular portion 24a is an annular plate, and is formed in a shape and dimensions so as to cover the gap 18 in the radial direction when viewed from the axial direction.

Each of the fixed portions 24b is rectangular, and is spaced apart from each other in the circumferential direction, and protrudes into the space between the winding conductor holding wedges 21t adjacent to each other on the radial outer side of the annular portion 24a. The shape of the fixing portion 24b is not limited to a rectangle, and may be, for example, a trapezoid. The fixed portion 24b has a thicker wall thickness than the annular portion 24a. The annular portion 24a and the fixing portion 24b have a step on the surface on the stator core 21 side.

The fixing portion 24b is attached to the stator core 21 by, for example, an adhesive or the like. Alternatively, it may be mechanically attached by bolts or the like. Alternatively, it may be fixed to the winding conductor holding wedge 21t.

In the above, the case where the void end outflow suppression plate 24 is directly provided outside the stator core 21 in the axial direction is shown as an example, but the present invention is not limited to this. For example, the same applies even when clampers for sandwiching the stator core 21 in the axial direction are provided on both outer sides of the stator core 21 in the axial direction. In this case, the void end outflow suppression plate 24 can be fixed to the clamper.

Since the annular portion 24a and the fixing portion 24b have a step on the surface on the stator core 21 side, a gap is formed in the axial direction between the annular portion 24a and the rotor core 12. The annular seal member 24c is attached to the surface of the annular portion 24a on the rotor core 12 side to fill this gap. The annular seal member 24c has elasticity, and even if it comes into contact with the rotor core 12, almost no frictional force is applied to the rotor core 12. It is preferable that the surface of the annular seal member 24c on the rotor core 12 side is smooth and the friction coefficient is as low as possible.

If the gap is reduced by providing the annular seal member 24c, the annular seal member 24c does not have to come into contact with the rotor core 12. Alternatively, even if the annular seal member 24c is not provided, if the annular portion 24a is provided so that the outflow of outside air from the void 18 to the outlet space 40v is suppressed to the desired degree, the annular portion 24a is provided. The seal member 24c does not necessarily have to be provided.

In the rotary electric machine 100a according to the present embodiment, when the rotor 10 is inserted into the stator 20, the gap end outflow suppression plate 24 is attached without closing the bearing bracket 45a on the coupling side, and then, Assembly is possible by the procedure of closing the bearing bracket 45a on the coupling side.

In the rotary electric machine according to the present embodiment formed as described above, almost all of the outside air flowing from the rotor 10 into the gap 18 and the outside air directly flowing into the gap 18 flow into the stator 20 side. Therefore, the cooling capacity can be further secured.

[Third Embodiment]
FIG. 14 is a vertical cross-sectional view showing the configuration of the rotary electric machine according to the third embodiment.

The third embodiment is a modification of the first embodiment. The rotary electric machine 100b according to the third embodiment has a guide 48a on the bonding side and a guide 48b on the antibonding side. Other than this, it is the same as that of the first embodiment.

The guide 48a is provided on the inner surface of the frame 40 and the bearing bracket 45a on the coupling side to form a smooth flow path and reduce the pressure loss of the outside air flow. Similarly, the guide 48b is provided on the inner surfaces of the frame 40 and the antibonding bearing bracket 45b to form a smooth flow path and reduce the pressure loss of the outside air flow.

As described above, in the rotary electric machine 100b according to the third embodiment, it is possible to reduce the pressure loss due to the flow of the outside air.

[Other Embodiments]
Although the embodiments of the present invention have been described above, the embodiments are presented as examples and are not intended to limit the scope of the invention. For example, in the embodiment, the case of the horizontal type rotary electric machine is shown as an example, but the case of the vertical type may be used.

Further, in the embodiment, the case where the entrance space is the space on the anti-bonding side and the exit space is the space on the coupling side is shown as an example. It may be the case of.

Further, the embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiments and modifications thereof are included in the scope and the gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

1 ... Main body, 10 ... Rotor, 11 ... Rotor shaft, 11a ... Joint part, 12 ... Rotor core, 12a ... Axial flow path, 12d ... Rotor core duct, 12p ... Axial flow path closing plate, 18 ... Void, 20 ... Stator, 21 ... Stator core, 21a ... Stator slot, 21d ... Stator core duct, 21t ... Stator winding conductor holding wedge, 22 ... Stator winding, 22a ... Stator winding conductor, 24 ... Air gap end outflow suppression plate, 24a ... annular portion, 24b ... fixing portion, 24c ... annular seal member, 30a ... coupling side bearing, 30b ... anti-coupling side bearing, 40 ... frame, 40a ... in-machine space, 40c ... stator Closing plate, 40f ... annular flow path, 40h ... coupling side end opening, 40p ... intake port, 40q ... exhaust port, 40v ... outlet space, 40w ... inlet space, 45a ... coupling side bearing bracket, 45b ... anti-coupling side bearing Bracket, 48a, 48b ... Guide, 50 ... Outside air supply device, 51 ... External fan, 52 ... Drive unit, 53 ... Fan cover, 56 ... Inflow port, 57 ... Air supply port, 100, 100a, 100b ... Rotor

Claims (4)

A rotor shaft that extends in the direction of the rotation axis and is rotatably supported, an axial flow path that is provided on the radial outer side of the rotor shaft and penetrates in the axial direction, and an axial flow path that is formed at a distance from each other in the axial direction. A rotor having a rotor core formed with a plurality of rotor core ducts forming a flow path from the flow path to the outer side in the radial direction, and a rotor having a rotor core.
Cylindrical shape in which a plurality of stator core ducts are formed on the outer side of the rotor core in the radial direction via a gap and formed at intervals in the axial direction to form a flow path from the gap to the outer side in the radial direction. And a stator winding including a stator winding conductor penetrating in a plurality of stator slots arranged radially inside the stator core at intervals in the circumferential direction and penetrating in the axial direction. With a stator with
A tubular shape that is arranged so as to cover the radial direction of the stator and has an intake port for taking in outside air and an exhaust port arranged on the opposite side of the stator and exhausting the taken in outside air. With the frame
A bonding side bearing and an antibonding side bearing that support the rotor shaft on both sides in the rotation axis direction with the rotor core in between.
Each of the coupling side bearing and the anti-coupling side bearing is fixedly supported, and has an inlet space which is a portion flowing in from the intake port and an outlet space which is a portion flowing out to the exhaust port together with the frame, and a flow path of outside air. The coupling side bearing bracket and the anti-coupling side bearing bracket, which form an in-flight space to be connected to both sides of the frame in the rotation axis direction,
An outside air supply device that supplies outside air into the frame,
With
The rotor core has an axial flow path closing plate that closes an end of the axial flow path facing the outlet space.
The frame has a stator closing plate that closes an end of the annular flow path between the stator core and the frame facing the inlet space.
A rotating electric machine that is characterized by that. The rotary electric machine according to claim 1, wherein the stator core has a gap end outflow suppressing plate that suppresses the outflow of outside air from the end of the gap facing the outlet space to the outlet space. .. Each of the plurality of stator slots is provided with a winding conductor holding wedge that is arranged on the air gap side on the radial inner side of the stator winding conductor and extends in the axial direction.
The gap end outflow control plate is
An annular portion formed so as to cover the void in the radial direction, and an annular portion.
A plurality of fixing portions projecting between the winding conductor holding wedges adjacent to each other on the radial outer side of the annular portion at intervals in the circumferential direction.
The rotary electric machine according to claim 2, wherein the rotary electric machine has. A method of assembling a rotary electric machine in which the rotor core has an axial flow path closing plate and the frame has a stator closing plate.
The stator closing plate mounting step for mounting the stator closing plate on the inner surface of the frame, and
After the stator closing plate mounting step, the antibonding bearing bracket mounting step and the antibonding bearing bracket mounting step
After the antibonding bearing bracket mounting step, a stator mounting step for mounting the stator to the frame, and
In parallel with the stator closing plate mounting step or the stator mounting step, after mounting the rotor core on the rotor shaft, the axial flow path closing plate is attached to the end facing the outlet space of the axial flow path. Axial flow path closure plate mounting step and mounting
After the axial flow path closing plate mounting step, the coupling side bearing and the coupling side bearing bracket mounting step for mounting the coupling side bearing bracket,
After the stator mounting step and the coupling side bearing bracket mounting step, a rotor insertion step for inserting the rotor into the stator, and a rotor insertion step.
A method of assembling a rotary electric machine, which is characterized by having.

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