JP6084561B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine.

  As a background art in this technical field, there is JP 2011-205745 A (Patent Document 1). This publication states that “obtain a motor cooling fan and motor with high cooling performance by the cooling fan.” Moreover, there exists Unexamined-Japanese-Patent No. 2013-27181 (patent document 2). This publication describes that “it provides a rotating electrical machine that can be operated even in a severe environment such as direct sunlight and realizes low noise”.

JP 2011-205745 A JP2013-27181A

  Patent Document 1 describes a rotating electric machine that performs cooling using a cooling fan. A terminal box base and a suspension bolt base are attached to the rotating electric machine. In such a rotating electric machine, the pedestal is necessary for the structure of the rotating electric machine, but is an element that hinders the flow of cooling air to the output shaft side by the cooling fan installed on the non-output shaft side.

  Moreover, the rotary electric machine of patent document 2 guide | induces the cooling wind by a cooling fan to the output-shaft side by installing the cover which covers a housing outer periphery. In such a rotating electrical machine, when a structural change occurs at the outer periphery of the housing, such as when the terminal box mounting position is changed, the cover shape must be changed.

  Therefore, the present invention provides a rotating electrical machine capable of guiding cooling air to the output shaft side while flexibly responding to the structural change of the outer peripheral portion of the housing.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-mentioned problems. For example, a housing, a stator attached to the housing, a rotor rotating by a rotating magnetic field generated by the stator, One end rotating with the rotation of the rotor protrudes from the housing to become an output shaft, a bearing provided in the housing for supporting the rotation shaft, and provided outside the housing on the side opposite to the output shaft. A rotating electric machine having a cooling fan and a terminal box base provided on the outer peripheral surface of the housing for installing a terminal box, the outer peripheral surface of the housing in which the terminal box base is not disposed in the rotation axis direction A first surface covering a portion extending in the rotation axis direction and a second surface covering a portion extending in the radial direction of the rotor at the output shaft side outer peripheral end portion; The cover is integral to the rotary electric machine which is provided on the housing outer periphery.

  ADVANTAGE OF THE INVENTION According to this invention, the rotary electric machine which can respond flexibly with respect to the structure change in a housing outer peripheral part, and can improve cooling performance with high versatility can be provided.

It is sectional drawing which shows the structure of the rotary electric machine of Example 1. FIG. It is an example of the block diagram of the conventional rotary electric machine. It is a figure which shows the cover shape of Example 1. FIG. It is a figure which shows the cover attachment state of Example 1. FIG. It is a figure which shows the cover attachment state of Example 2. FIG. It is a figure which shows the cover shape of Example 2. FIG. It is a figure which shows the cover attachment state of Example 3. FIG. It is a figure which shows the cover shape of Example 3. FIG. It is a figure which shows the cover attachment state of Example 4. FIG. It is a figure which shows the cover shape of Example 4. FIG.

  Hereinafter, examples will be described with reference to the drawings.

  In this embodiment, the first surface covering the circumference of the outer peripheral surface of the housing where the terminal box base is not disposed and covering the portion extending in the direction of the rotation axis, and the outer peripheral end of the output shaft, the radius of the rotor By providing a cover integrally formed with the second surface that covers the portion extending in the direction, the wind flowing in the axial direction from the cooling fan through the outer periphery is partially guided to the output shaft side bearing side and output An example of a highly versatile rotating electrical machine that can improve the cooling efficiency of the shaft-side bearing and at the same time flexibly cope with structural changes at the outer periphery of the housing will be described.

  FIG. 1 is a cross-sectional view showing the configuration of the rotating electrical machine of this embodiment. In FIG. 1, a housing 1 constitutes a casing of a rotating electric machine by cast iron, aluminum, a thin steel plate and the like formed in a cylindrical shape. The rotating electrical machine according to the present embodiment is a fully enclosed, outer-cooled rotating electrical machine in which the inside is substantially sealed by the housing 1, the output shaft side end bracket 2a, and the non-output shaft side end bracket 2b, and the outside air and the inside air are separated. It is.

  In the sealed space, a stator 3 and a rotor 4 serving as heating elements are arranged. The stator 3 is fixed to the inner peripheral portion of the housing 1 and includes a stator core 3a and a stator coil 3b. The stator core 3a is configured by laminating a plurality of thin electromagnetic steel plates. The stator coil 3b is wound around a plurality of slot portions formed in the stator core 3a.

  The rotor 4 is fixed to the outer peripheral portion of the rotary shaft 5 and includes an end ring 4c and a blade 4d that are integrally formed with the rotor core 4a and the rotor conductor bar 4b. The rotor core 4a is configured by laminating a plurality of thin electromagnetic steel plates. The rotor 4 is rotated by a rotating magnetic field generated by the stator 3.

  Both ends of the rotary shaft 5 are rotatably held by the output shaft side end bracket 2a and the counter output shaft side end bracket 2b via the output shaft side bearing 6a and the counter output shaft side bearing 6b, respectively. Further, one end portion of the rotating shaft 5 is inserted through the output shaft side end bracket 2a and protrudes to the outside to form an output shaft. The other end portion of the rotating shaft 5 is inserted through the non-output shaft side end bracket 2b and the cooling fan 7 is mounted.

  Since the cooling fan 7 is fixed to the rotating shaft 5, it rotates in synchronization with the rotating shaft 5. The cooling fan 7 is manufactured from cast iron, aluminum alloy, resin, or the like. The cooling fan 7 is attached to an outer space 8 formed by the housing 1 and the non-output shaft side end bracket 2b and covered with an end cover 9.

  Hereinafter, the cooling configuration and operation in each space will be described.

  The sealed space outer region 8 is the outside of the space covered with the housing 1 and the non-output shaft side end bracket 2b, and the cooling fan 7 is placed in the space. An end cover 9 is provided so as to cover the cooling fan 7, and is a space communicating with the outside air through the end cover opening 10 and the discharge port 11.

  In the outside space 8, the cooling fan 7 fixed to the rotating shaft 5 rotates, so that outside air is taken in from the end cover opening 10. The taken-in outside air is blown from the discharge port 11 of the end cover 9 toward the outer periphery of the housing 1 and the output shaft side, and cools the heat generated inside the rotating electrical machine. At this time, the heat dissipation fins 12 are provided in the housing 1 to promote heat dissipation of the device.

  In general, since heat generated from the stator 3 and the rotor 4 becomes a heat generation source in the rotating electrical machine, the output shaft side bearing 6a and the non-output shaft side bearing 6b which are close to each other through the rotating shaft 5 are affected by heat. Easy to receive. Further, the output shaft side bearing 6a is not affected by the cooling air by the cooling fan 7 due to the structure of the rotating electric machine, and tends to become high temperature. Therefore, cooling of the output shaft side bearing 6a is important.

  Therefore, for the purpose of improving the cooling performance of the output shaft side bearing 6a, it is conceivable to arrange a cover for inducing cooling air at the output shaft side end portion of the housing 1.

  FIG. 2 is an example of a configuration diagram of a conventional rotating electrical machine in which a cover for covering the outer periphery of the housing is installed. As shown in FIG. 2, the cooling air from the cooling fan is guided to the output shaft side by the cover 14 covering the outer periphery of the housing and the cover 15 covering the outer periphery of the output shaft side end bracket. In such a rotating electrical machine, the shape of the cover 14 is changed when a structural change occurs in the outer periphery of the housing, such as when the mounting position of the terminal box 16 is changed or when the mounting position of the suspension bolt 17 is changed. Is indispensable, and there is a problem that versatility in the production of rotating electrical machines deteriorates.

  Therefore, in this embodiment, the cover 14 covering the outer periphery of the housing and the cover 15 covering the outer periphery of the output shaft side end bracket are eliminated, and the rotation axis direction and the output shaft of the outer peripheral surface of the housing where the terminal box base of the housing is not disposed. A simple cover is placed at the side edge.

  FIG. 3 is a diagram showing a cover shape in the present embodiment. As shown in FIG. 3, the cover 13 for guiding the cooling air to the output shaft side in the present embodiment has a first surface 13-1, a second surface 13-2, and a third surface 13-3. And are configured integrally. For example, it is the shape which bent the flat plate and thin steel plate which were shape | molded with the resin-type material, and can suppress components and processing cost. In addition, although each surface which comprises the cover 13 is desirable in order to reduce processing cost, it is desirable that it is a flat surface, and the induction | guidance | derivation effect of a cooling wind is heightened more by making it a curved surface and giving an R shape to a bending part. You may do it.

  FIG. 4 is a configuration diagram of the rotating electrical machine in the present embodiment, and is a diagram illustrating a cover attachment state. As shown in FIG. 4, the cooling air flows in the direction of the output shaft side bearing 6a by disposing the cover 13 at the rotation axis direction of the outer peripheral surface of the housing where the terminal box base 20 of the housing 1 is not disposed and at the output shaft side end portion. The cooling function of the output shaft side bearing 6a is realized.

  That is, in the present embodiment, as shown in FIG. 4, the first surface 13-1 of the cover 13 so as to cover the portion extending in the rotation axis direction of the outer peripheral surface of the housing where the terminal box base 20 is not disposed. Is disposed, and the second surface 13-2 of the cover 13 is disposed so as to cover a portion extending in the radial direction of the rotor at the outer peripheral end portion on the output shaft side, and the cover 13 is disposed on the terminal box base 20 that is not used. It is fixed via the third surface 13-3.

  Thereby, even when changing the mounting position of the terminal box 16 or when changing the mounting position of the suspension bolt 17, it is only necessary to change the position at which the cover 13 is fixed without changing the shape of the cover 13. Therefore, the cooling performance of the output shaft side bearing 6a can be improved without being influenced by the structural change at the outer periphery of the housing.

  In FIG. 4, the cover 13 is fixed to the unused terminal box base 20 by screwing or bonding via the third surface 13-3. Moreover, you may adhere | attach on the base for end bracket attachment. In addition, when there is not a plurality of terminal box pedestals and there is no unused terminal box pedestal, the cover 13 may be fixed by bending the ends of the cover 13 along the ribs of the radiating fins 12 and bonding them to the ribs. . In that case, the 3rd surface 13-3 for fixing to the terminal box base of the cover 13 becomes unnecessary.

  As described above, this embodiment includes a housing, a stator attached to the housing, a rotor that rotates by a rotating magnetic field generated by the stator, and one end that rotates as the rotor rotates. A rotating shaft that protrudes from the housing and serves as an output shaft; a bearing that is provided in the housing and supports the rotating shaft; a cooling fan that is provided outside the housing on the side opposite to the output shaft; and an outer peripheral surface of the housing A rotating electric machine having a terminal box base for installing a terminal box, the rotary electric machine covering a portion extending on the circumference of the outer peripheral surface of the housing where the terminal box base is not disposed and extending in the rotation axis direction A cover in which a first surface and a second surface that covers a portion extending in the radial direction of the rotor at the output shaft side outer peripheral end portion are integrally provided on the outer peripheral portion of the housing. And electrical machinery. The cover further has a third surface for fixing to the terminal box base, and the third surface is configured integrally with the first surface and the second surface, The cover is a rotating electric machine that is fixed to a terminal box base that does not have a terminal box among the plurality of terminal box bases via the third surface.

  Thereby, even when changing the mounting position of the terminal box 16 or when changing the mounting position of the suspension bolt 17, it is only necessary to change the position at which the cover 13 is fixed without changing the shape of the cover 13. Therefore, it is difficult to depend on the structure of the outer periphery of the housing, and there is no need to change the shape of the cover for changing the structure of the outer periphery of the housing. A rotating electrical machine can be provided.

  That is, according to the present embodiment, it is possible to provide a rotating electrical machine that can flexibly cope with a structural change at the outer peripheral portion of the housing and is highly versatile and capable of improving the cooling performance.

  In the present embodiment, an example of a rotating electrical machine in which the shape of the cover is extended to the opposite output shaft side with respect to the first embodiment will be described.

  FIG. 5 is a diagram showing a configuration diagram of the rotating electrical machine of the present embodiment, and is a diagram showing a cover attachment state. Moreover, FIG. 6 is a figure which shows an example of the cover shape of a present Example. In the following, with respect to the present embodiment, differences from the first embodiment will be mainly described, and description of the other will be omitted.

  As shown in FIG. 5, in the present embodiment, the cover 13 of the first embodiment attached to the rotating shaft direction and the output shaft side end portion of the outer peripheral surface of the housing 1 where the terminal box base 20 of the housing 1 is not disposed is counter-output. The shape of the cover 18 extends in the axial direction. That is, as shown in FIG. 6, the first surface 18-1 extending in the rotation axis direction has a shape extending in the counter-output shaft side direction shown in FIG. 5.

  Thus, by providing the cover 18 with a function as a guide for preventing the cooling air from the cooling fan 7 from being discharged outward, the cooling performance of the output shaft side bearing 6a can be improved. .

  As in the first embodiment, the cover 18 is fixed to the unused terminal box pedestal 20 by screwing or bonding via the third surface 18-3, or to the end bracket mounting pedestal. It may be adhered. Further, when there are no plural terminal box bases and there is no unused terminal box base, the cover 18 may be fixed by bending the end portion of the cover 18 along the rib of the radiating fin 12 and bonding it to the rib. . In that case, the cover 18 does not need the third surface 18-3 for fixing to the terminal box base.

  In the present embodiment, an example of a rotating electrical machine in which the shape of the cover is extended in the circumferential direction with respect to the first embodiment will be described.

  FIG. 7 is a diagram showing a configuration diagram of the rotating electrical machine of the present embodiment, and is a diagram showing a cover attachment state. Moreover, FIG. 8 is a figure which shows an example of the cover shape of a present Example. Hereinafter, with respect to the present embodiment, differences from the first and second embodiments will be mainly described, and the description of the other portions will be omitted.

  In the present embodiment, the cover 19 of the first embodiment attached to the rotating shaft direction and the output shaft side end portion of the outer peripheral surface of the housing where the terminal box base 20 of the housing 1 is not disposed is extended in the circumferential direction. Shape. That is, as shown in FIG. 8, the cover 19 has a plurality of first surfaces 19-1 extending in the rotation axis direction and second surfaces 19-2 extending in the radial direction of the rotor. The third surface 19-3 for fixing to the terminal box pedestal 20 is integrally formed, and has a shape extending in the circumferential direction as shown in FIG.

  Thereby, since the air volume which the cooling air which distribute | circulates from the cooling fan 7 is induced | guided | derived by the cover 19 increases, the improvement of the cooling performance of the output shaft side bearing 6a is realizable.

  As in the first embodiment, the cover 19 is fixed to the unused terminal box pedestal 20 by screwing or bonding via the third surface 19-3, or to the end bracket mounting pedestal. It may be adhered.

  Further, the present embodiment may be configured in combination with the second embodiment.

  In the present embodiment, an example of a rotating electrical machine in which a heat radiating fin is installed on the cover will be described with respect to the first embodiment.

  FIG. 9 is a diagram showing a configuration diagram of the rotating electrical machine of the present embodiment, and is a diagram showing a cover attachment state. Moreover, FIG. 10 is a figure which shows an example of the cover shape of a present Example. Hereinafter, with respect to the present embodiment, points different from the first to third embodiments will be mainly described, and the description of the other portions will be omitted.

  In the present embodiment, the cover 21 of the first embodiment, which is attached to the rotation axis direction and the output shaft side end portion of the outer peripheral surface of the housing 1 where the terminal box base 20 of the housing 1 is not disposed, is provided with a heat dissipation fin 21. The shape of Thereby, the housing surface area can be increased, and the cooling performance of both the housing 1 and the output shaft side bearing 6a can be improved.

  This configuration is more effective in a rotating electrical machine having a plurality of terminal box bases. That is, when the rotating electrical machine has a plurality of terminal box bases, the number of heat radiation fins 12 that can be provided in the housing 1 is reduced, and the cooling performance is deteriorated due to the reduction in the surface area of the housing 1. Therefore, by providing fins on the cover 21 arranged on the terminal box base, the surface area of the housing can be increased, and the cooling performance of both the housing 1 and the output shaft side bearing 6a can be improved.

  Note that this embodiment may be configured in combination with the second or third embodiment.

  The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

1 ... Housing, 2a ... Output shaft side end bracket,
2b: Non-output shaft side end bracket, 3 ... Stator, 4 ... Rotor,
5 ... rotating shaft, 6a ... output shaft side bearing, 6b ... anti-output shaft side bearing,
7 ... Cooling fan, 8 ... Outer space area, 9 ... End cover,
10 ... End cover opening, 11 ... Discharge port, 12 ... Radiation fin,
13, 18, 19, 21 ... cover, 16 ... terminal box, 17 ... suspension bolt,
20: Terminal box base,

Claims (6)

A housing, a stator attached to the housing, a rotor rotating by a rotating magnetic field generated by the stator, and a rotating shaft whose one end rotating with the rotation of the rotor protrudes from the housing and serves as an output shaft When a bearing for supporting the rotary shaft is provided in the housing, a cooling fan is provided outside of the housing of the counter-output shaft side, for mounting the terminal box provided on an outer peripheral surface of the housing A rotating electric machine having a terminal box base,
Radius of the rotor a first surface and output shaft side outer peripheral end portion covering a portion which extends a in the rotational axis direction at the circumference of the outer peripheral surface of the housing of the terminal box base is not located A rotating electrical machine comprising: a cover integrally formed with a second surface covering a portion extending in a direction on the outer peripheral portion of the housing. The rotating electrical machine according to claim 1,
It has a plurality of the terminal box base,
The cover further has a third surface for fixing to the terminal box pedestal, and the third surface is configured integrally with the first surface and the second surface,
The rotating electric machine according to claim 1, wherein the cover is fixed to a terminal box base on which no terminal box is installed among the plurality of terminal box bases via the third surface. The rotating electrical machine according to claim 1 or 2,
The rotating electrical machine according to claim 1, wherein the first surface of the cover is a surface extending in a direction opposite to the output shaft side . The rotating electrical machine according to any one of claims 1 to 3,
The cover has a plurality of the first surface and the second surface, and the surfaces are integrally formed. The rotating electrical machine according to any one of claims 1 to 4,
The rotating electrical machine according to claim 1, wherein the cover includes fins on the first surface or the third surface. The rotating electrical machine according to any one of claims 1 to 5,
The rotating electric machine characterized in that the first surface and the second surface or the third surface are flat surfaces.

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