CN212935661U

CN212935661U - Motor with air cooling structure

Info

Publication number: CN212935661U
Application number: CN202022220713.2U
Authority: CN
Inventors: 闫晗; 王文慧; 李彦祥; 陈新格
Original assignee: Wolong Electric Shanghai Central Research Institute Co ltd; Zhejiang Longchuang Motor Technology Innovation Co ltd; Wolong Electric Group Co Ltd
Current assignee: Wolong Electric Shanghai Central Research Institute Co ltd; Zhejiang Longchuang Motor Technology Innovation Co ltd; Wolong Electric Drive Group Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-04-09
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a motor with forced air cooling structure, including motor stator, electric motor rotor, motor casing and motor end cover, still include: the centrifugal fan is arranged in the motor shell and fixedly connected with the motor rotor, and an air inlet hole is formed in the position, corresponding to the centrifugal fan, of the motor end cover; and a ventilation opening which is arranged on the motor shell and is used for enabling cooling air generated by the centrifugal fan to pass through, wherein the ventilation opening corresponds to the end part of the motor stator. Centrifugal fan, fresh air inlet and vent form the forced air cooling structure of motor, when centrifugal fan rotated, the cooling air that produces radially flowed to motor stator's tip, direct stator coil and the contact of stator core with motor stator, then flow to the outside through the vent, take the motor outside with the heat that stator core and stator coil produced, with the temperature of effectively reducing motor stator tip, improve motor stator partial electric density, promote the power and the torque of motor, make the cooling effect and the performance homoenergetic of motor satisfy the demand.

Description

Motor with air cooling structure

Technical Field

The utility model relates to the technical field of motors, more specifically say, relate to a motor with forced air cooling structure.

Background

In the working process of the motor, the stator core and the stator coil can generate a large amount of heat, and the prior art generally adopts an air cooling or water cooling mode to dissipate the heat of the motor.

For example, for a permanent magnet synchronous motor, an air cooling structure is adopted to dissipate heat of the motor, and the air cooling structure in the prior art generally includes an axial flow fan connected to a rotor of the motor, and the axial flow fan is used to dissipate heat of the motor axially.

However, the air cooling structure has a poor heat dissipation effect on the end portion of the stator, and practical research shows that the temperature of the end portion of the stator is rather the highest, so that the electric density of the stator portion of the motor is generally relatively low in order to avoid the overhigh temperature of the end portion of the stator, which leads to low power of the motor, and therefore, the air cooling structure is difficult to meet the industry requirements of the electric automobile industry, the aerospace industry and the like on high power density and high heat dissipation capacity.

To sum up, how to perform better heat dissipation on the end part of the motor stator and avoid the over-high temperature of the end part of the motor stator is a problem to be solved urgently by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a motor with air-cooled structure, its motor stator's tip has better radiating effect, can avoid motor stator tip's high temperature to can improve motor stator part's secret, promote the power and the torque of motor, make the cooling effect and the performance homoenergetic of motor satisfy the demand.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a motor with forced air cooling structure, includes motor stator, electric motor rotor, motor casing and motor end cover, still includes:

the centrifugal fan is arranged in the motor shell and fixedly connected with the motor rotor, and an air inlet hole is formed in the position, corresponding to the centrifugal fan, of the motor end cover;

and the ventilation opening is arranged on the motor shell and used for enabling cooling air generated by the centrifugal fan to pass through, and the ventilation opening corresponds to the end part of the motor stator.

Preferably, the motor end cover includes a shaft deep end cover and a non-shaft deep end cover respectively provided at both ends of the motor housing, and the centrifugal fan is provided near the non-shaft deep end cover.

Preferably, a plurality of heat dissipation ribs are arranged at intervals on the outer periphery of the motor casing, and the length direction of the heat dissipation ribs is parallel to the axial direction of the motor casing.

Preferably, the heat dissipating ribs are disposed obliquely to a surface of the motor housing.

Preferably, the width of the root of the heat dissipation rib is greater than the width of the top of the heat dissipation rib.

Preferably, the wind guide cover is arranged on the outer periphery of one end, close to the non-shaft deep end cover, of the motor shell, and a preset gap is formed between the wind guide cover and the ventilation opening to form a radial air duct; and the air outlet end of the air guide cover is in butt joint with one end of the heat dissipation rib.

Preferably, one end of the motor shell, which is close to the non-shaft-deep-end cover, is provided with a flange protruding outwards in the radial direction, and the wind scooper is assembled with the outer periphery of the flange.

Preferably, the non-shaft deep end cover is fixedly connected with the flange through a first bolt.

Preferably, the wind scooper is sleeved on the outer peripheral part of the non-shaft deep-end cover and is fixedly connected with the non-shaft deep-end cover through a second bolt.

Preferably, the motor end cover is provided with a wind shielding boss surrounding the periphery of the centrifugal fan to prevent cooling wind generated by the centrifugal fan from flowing out of the wind inlet.

The utility model provides a motor with forced air cooling structure, centrifugal fan, fresh air inlet and vent form the forced air cooling structure of motor, when centrifugal fan rotates along with electric motor rotor, the cooling air that centrifugal fan produced, radial flow to electric motor stator's tip, direct stator coil and the stator core contact with electric motor stator, then flow to the outside through the vent, take the motor outside with the heat that stator core and stator coil produced, with the temperature of effectively reducing electric motor stator tip, and then can improve the electric density of electric motor stator part, promote the power and the torque of motor, make the cooling effect and the performance homoenergetic of motor satisfy and require higher trade demand to power density and heat-sinking capability such as electric automobile trade and aerospace trade.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a right side view of a motor with an air cooling structure according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a right side elevational view of the motor housing of FIG. 1;

FIG. 4 is a sectional view taken along line B-B of FIG. 3;

FIG. 5 is a left side view of the non-axial deep end cap of FIG. 1;

FIG. 6 is a cross-sectional view of the non-axial, deep-end cap shown in FIG. 5.

The reference numerals in fig. 1 to 6 are as follows:

the structure comprises a motor stator 1, a motor rotor 2, a motor shell 3, a ventilation opening 31, a heat dissipation rib 32, an axial air duct 321, a flange 33, a threaded hole 331, a centrifugal fan 4, an axial deep end cover 51, a non-axial deep end cover 52, an air inlet 521, a wind shielding boss 522, an air guide cover 6, a first bolt 7 and a bearing 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The core of the utility model is to provide a motor with forced air cooling structure, its motor stator's tip has better radiating effect, can avoid motor stator tip's high temperature to can improve motor stator part's secret, promote the power and the torque of motor, make the cooling effect and the performance homoenergetic of motor satisfy the demand.

Referring to fig. 1 to 6, fig. 1 is a right side view of a motor with an air cooling structure according to an embodiment of the present invention; FIG. 2 is a sectional view taken along line A-A of FIG. 1; FIG. 3 is a right side elevational view of the motor housing of FIG. 1; FIG. 4 is a sectional view taken along line B-B of FIG. 3; FIG. 5 is a left side view of the non-axial deep end cap of FIG. 1; FIG. 6 is a cross-sectional view of the non-axial, deep-end cap shown in FIG. 5.

The utility model provides a motor with forced air cooling structure mainly includes motor stator 1, electric motor rotor 2, motor casing 3, motor end cover and centrifugal fan 4 etc..

It can be understood that the electronic rotor is assembled inside the motor stator 1, the motor stator 1 is assembled inside the motor housing 3, the number of the motor end covers is two, the two end covers are respectively arranged at two ends of the motor housing 3, and the motor end covers are connected with the motor rotor 2 through the bearing 8. The respective main structures of the motor stator 1, the motor rotor 2, the motor housing 3 and the motor end cover and the specific assembling relation among the main structures can refer to the prior art, and are not described herein again.

The utility model discloses a focus is on, sets up centrifugal fan 4 in motor casing 3's inside, centrifugal fan 4 and electric motor rotor 2 fixed connection, and it can be understood that, considering the possibility of installation, centrifugal fan 4 is close to the motor end cover setting, and the position that the motor end cover corresponds centrifugal fan 4 is equipped with fresh air inlet 521 to when centrifugal fan 4 rotates along with electric motor rotor 2's rotation, produce the cooling air.

Furthermore, a vent 31 is disposed at a position of the motor housing 3 corresponding to the end of the motor stator 1, and the vent 31 penetrates through a sidewall of the motor housing 3, so that the inside of the motor housing 3 is communicated with the outside.

That is, centrifugal fan 4, fresh air inlet 521 and vent 31 form the air-cooled structure of motor, like this, when centrifugal fan 4 rotates along with electric motor rotor 2, the cooling air that centrifugal fan 4 produced, radial flow to the tip of motor stator 1, direct stator coil and the stator core contact with motor stator 1, then flow to outside through vent 31, bring the heat that stator core and stator coil produced to the motor outside, with the temperature of effectively reducing motor stator 1 tip, and then can improve the electricity density of motor stator 1 part, promote the power and the torque of motor, make the cooling effect and the performance homoenergetic of motor satisfy the higher trade demand of power density and heat-sinking capability such as electric automobile trade and aerospace trade.

It should be noted that the utility model discloses do not restrict centrifugal fan 4's quantity, for example, centrifugal fan 4's quantity can be two, and motor casing 3's both ends are located respectively to two centrifugal fan 4, and the motor end cover at both ends all is equipped with above-mentioned fresh air inlet 521.

In consideration of the limitation of the installation space, on the basis of the above embodiment, the motor end cover includes the shaft deep end cover 51 and the non-shaft deep end cover 52 provided at both ends of the motor housing 3, respectively, and the centrifugal fan 4 is disposed near the non-shaft deep end cover 52.

It is understood that the shaft deep end cover 51 needs to be provided with other structures of the motor, and in order to avoid increasing the installation space on the shaft deep end cover 51 side, the centrifugal fan 4 is provided on the non-shaft deep end cover 52 side in the present embodiment, and correspondingly, the non-shaft deep end cover 52 is provided with the air inlet holes 521.

The utility model discloses do not restrict air inlet 521's shape and specific quantity, as shown in fig. 5, air inlet 521 is similar fan-shaped structure, and air inlet 521's quantity is four, four air inlet 521 circumference evenly distributed.

In addition, in order to improve the heat dissipation effect of the motor housing 3, in addition to the above embodiment, the outer circumferential portion of the motor housing 3 is provided with a plurality of heat dissipation ribs 32 arranged at intervals, and the length direction of the heat dissipation ribs 32 is parallel to the axial direction of the motor housing 3.

That is, in the present embodiment, the heat dissipation ribs 32 disposed on the outer periphery of the motor housing 3 enhance the heat dissipation of the motor housing 3, so as to dissipate the heat transferred from the motor stator 1 to the motor housing 3 as soon as possible.

It can be understood that a certain gap is formed between two adjacent heat dissipation ribs 32 to form an axial air duct 321, so as to facilitate heat dissipation.

It should be noted that, in the present embodiment, the specific number of the heat dissipation ribs 32 is not limited, meanwhile, the distance between the heat dissipation ribs 32 is not limited, the distances between two adjacent heat dissipation ribs 32 may be equal or different, and preferably, all the heat dissipation ribs 32 are uniformly distributed along the outer peripheral portion of the motor housing 3, that is, the heat dissipation ribs 32 are arranged at equal intervals.

Further, in order to increase the heat dissipation area of the heat dissipation ribs 32 and enhance the heat dissipation effect, on the basis of the above embodiment, the heat dissipation ribs 32 are disposed obliquely with respect to the surface of the motor housing 3.

That is, the heat dissipating ribs 32 are not perpendicular to a tangent plane of the motor housing 3 at the intersection of the heat dissipating ribs 32 and the motor housing 3, but have a certain included angle with the tangent plane, which can properly increase the heat dissipating area of the heat dissipating ribs 32 and improve the heat dissipating effect under the condition that the heat dissipating ribs 32 have the same radial dimension.

Further, in order to increase the rigidity of the root of the heat dissipation rib 32, on the basis of the above-described embodiment, the width of the root of the heat dissipation rib 32 is larger than the width of the tip of the heat dissipation rib 32.

It should be noted that, in the present invention, the root of the heat dissipating rib 32 refers to the end of the heat dissipating rib 32 connected to the motor housing 3; the top of the heat dissipating rib 32 is a free end of the heat dissipating rib 32 away from the surface of the motor housing 3.

That is, the cross section of the heat dissipation rib 32 is similar to a trapezoidal structure, so as to increase the width of the root of the heat dissipation rib 32 and improve the rigidity of the root of the heat dissipation rib 32; meanwhile, this can suitably increase the heat dissipation area of the heat dissipation rib 32, compared to the heat dissipation rib 32 of the equal-width structure.

In order to better radiate the stator winding copper wire and the radiating rib 32, on the basis of the above embodiment, the motor further comprises an air guide cover 6 arranged on the outer peripheral part of one end of the motor housing 3 close to the non-shaft deep end cover 52, and a preset gap is formed between the air guide cover 6 and the ventilation opening 31 to form a radial air duct; the air outlet end of the air guide cover 6 is in butt joint with one end of the heat dissipation rib 32.

That is to say, in the embodiment, by providing the wind scooper 6, a radial wind channel is formed between the wind scooper 6 and the vent 31, and by the butt joint of the wind scooper 6 and one end of the heat dissipation rib 32, the axial wind channel 321 between the wind scooper 6 and the heat dissipation rib 32 is communicated, and further by the guiding action of the wind scooper 6, the cooling wind generated by the centrifugal fan 4 comes out from the vent 31, enters between the vent 31 and the wind scooper 6, and enters into the axial wind channel 321 between the heat dissipation ribs 32 by the guiding action of the wind scooper 6, and further dissipates the heat of the motor housing 3 and the heat dissipation rib 32 by the cold wind generated by the centrifugal fan 4, so as to better reduce the heat of the stator winding copper wire in the motor housing 3.

In view of the convenience of the wind scooper 6, in the above embodiment, the end of the motor housing 3 near the non-axial deep-end cap 52 is provided with the radially outwardly protruding flange 33, and the wind scooper 6 is fitted to the outer peripheral portion of the flange 33.

It can be understood that the flange 33 protrudes radially from the outer circumferential surface of the motor housing 3, so that after the wind scooper 6 is assembled with the flange 33, a certain gap is formed between the wind scooper 6 and the vent 31 to form the radial air duct, so that the cooling air flowing out of the vent 31 flows along the radial air duct.

In view of the convenience of connecting the non-shaft-deep-end cover 52 to the motor housing 3, on the basis of the above-described embodiment, the non-shaft-deep-end cover 52 is fixedly connected to the flange 33 by the first bolts 7.

As shown in fig. 4, a threaded hole 331 is opened in the end surface of the flange 33 facing the non-shaft-deep-end cap 52; meanwhile, the non-shaft deep end cover 52 is provided with a bolt mounting hole at a position corresponding to the threaded hole 331, and when the non-shaft deep end cover 52 is fixed, the non-shaft deep end cover 52 is attached to the end face of the flange 33, and the first bolt 7 sequentially penetrates through the bolt mounting hole and the threaded hole 331, so that the non-shaft deep end cover 52 is fixedly connected with the flange 33.

In consideration of convenience in fixing the wind scooper 6 and avoiding the wind scooper 6 from moving or generating noise due to vibration generated by the operation of the motor, on the basis of the above embodiment, the wind scooper 6 is sleeved on the outer peripheral portion of the non-shaft-deep-end cover 52 and is fixedly connected with the non-shaft-deep-end cover 52 by the second bolt.

It can be understood that, after the non-axial deep-end cover 52 is fixedly connected to the flange 33, the non-axial deep-end cover 52 can close one end of the wind scooper 6 close to the flange 33, so that the wind from the ventilation opening 31 enters the axial wind channel 321 between the heat dissipating ribs 32 through the wind scooper 6.

In addition, in order to prevent the air generated by the centrifugal fan 4 from flowing out along the axial direction, to the air inlet hole 521 and then to flow out from the air inlet hole 521 during the rotation of the centrifugal fan 4, in addition to the above embodiment, the motor end cover is provided with the wind shielding boss 522 surrounding the outer periphery of the centrifugal fan 4 to prevent the air generated by the centrifugal fan 4 from flowing out from the air inlet hole 521.

It can be understood that, after the installation, the wind shielding protrusion 522 surrounds the outer periphery of the blades of the centrifugal fan 4, and a small gap is formed between the wind shielding protrusion 522 and the outer periphery of the blades of the centrifugal fan 4, so as to prevent the wind shielding protrusion 522 from affecting the rotation of the centrifugal fan 4, and at this time, the wind shielding protrusion 522 can prevent a large amount of wind generated by the centrifugal fan 4 from flowing out axially through the outer periphery of the blades of the centrifugal fan 4, finally flowing to the air inlet 521, and flowing out from the air inlet 521, so as to.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above that the utility model provides a motor with forced air cooling structure introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a motor with air-cooled structure, includes motor stator (1), electric motor rotor (2), motor casing (3) and motor end cover, its characterized in that still includes:

the centrifugal fan (4) is arranged in the motor shell (3) and fixedly connected with the motor rotor (2), and an air inlet hole (521) is formed in the position, corresponding to the centrifugal fan (4), of the motor end cover;

and a ventilation opening (31) which is arranged on the motor shell (3) and is used for enabling cooling air generated by the centrifugal fan (4) to pass through, wherein the ventilation opening (31) corresponds to the end part of the motor stator (1).

2. The electric machine with an air cooling structure according to claim 1, wherein the electric machine end cover comprises a shaft deep end cover (51) and a non-shaft deep end cover (52) which are respectively arranged at two ends of the electric machine shell (3), and the centrifugal fan (4) is arranged close to the non-shaft deep end cover (52).

3. The motor with the air cooling structure according to claim 2, wherein a plurality of heat dissipating ribs (32) are provided at intervals on an outer circumferential portion of the motor housing (3), and a length direction of the heat dissipating ribs (32) is parallel to an axial direction of the motor housing (3).

4. The motor having an air-cooling structure according to claim 3, wherein the heat dissipating ribs (32) are provided obliquely with respect to the surface of the motor housing (3).

5. The motor having an air-cooling structure according to claim 3, wherein the width of the root of the heat dissipating rib (32) is larger than the width of the tip of the heat dissipating rib (32).

6. The motor with the air cooling structure according to claim 3, further comprising an air guide cover (6) arranged on the outer periphery of one end of the motor housing (3) close to the non-shaft deep end cover (52), wherein a preset gap is formed between the air guide cover (6) and the ventilation opening (31) to form a radial air duct; the air outlet end of the air guide cover (6) is in butt joint with one end of the heat dissipation rib (32).

7. The electric machine with the air cooling structure as recited in claim 6, characterized in that one end of the motor shell (3) close to the non-shaft deep end cover (52) is provided with a flange (33) protruding radially outwards, and the wind scooper (6) is assembled with the outer periphery of the flange (33).

8. The electric machine with an air cooling structure according to claim 7, wherein the non-shaft deep end cover (52) is fixedly connected with the flange (33) through a first bolt (7).

9. The electric machine with the air cooling structure according to claim 8, wherein the wind scooper (6) is sleeved on an outer periphery of the non-axial deep-end cover (52) and is fixedly connected with the non-axial deep-end cover (52) through a second bolt.

10. The motor with the air cooling structure according to any one of claims 1 to 9, wherein the motor end cover is provided with a wind shielding boss (522) surrounding the outer periphery of the centrifugal fan (4) to prevent the cooling air generated by the centrifugal fan (4) from flowing out of the air inlet hole (521).