CN220985468U - Motor oil cooling structure and motor - Google Patents

Abstract

The application relates to the technical field of motor cooling, in particular to a motor oil cooling structure and a motor. The motor oil cooling structure comprises an energy storage ring and a bushing which are coaxially arranged along the axial direction of a motor; the bushing is coaxially sleeved between the stator and the rotor, and a plurality of oil passing grooves are correspondingly formed between the outer surface of the bushing along the peripheral side and a plurality of stator tooth grooves; the energy storage ring is coaxially sleeved with the outer ring and the inner ring, an oil cavity for accommodating the part of the winding extending out of the stator tooth slot is formed between the outer ring and the inner ring, and the oil cavity is communicated with a plurality of oil passing grooves. This motor oil cooling structure, through the setting of bush, separate into two independent cavities with stator place space and rotor installation cavity, formed the oil groove that crosses that is used for cooling winding between stator and bush simultaneously, when cooling oil flows in crossing the oil groove, also can give its contact position's stator cooling down to improve the cooling efficiency of whole motor.

Description

Motor oil cooling structure and motor

Technical Field

The application relates to the technical field of motor cooling, in particular to a motor oil cooling structure and a motor.

Background

The driving motor in the new energy automobile can produce a lot of heat at the during operation, and current common motor cooling mode is for cooling down motor stator through the cooling oil, and current oil cooling structure often can only cool down stator core, and the cooling oil is difficult to flow into the stator tooth groove from the terminal surface breach of stator tooth groove, and the cooling oil can't directly cool down for the winding in the stator tooth groove to influence the cooling radiating effect of whole motor.

Disclosure of utility model

In order to solve the technical problem, the present disclosure provides a motor oil cooling structure and a motor.

In a first aspect, the present disclosure provides an oil cooling structure of a motor, including an energy storage ring and a bushing coaxially disposed along an axial direction of the motor;

The bushing is coaxially sleeved between the stator and the rotor, and a plurality of oil passing grooves are correspondingly formed between the outer surface of the bushing along the peripheral side and a plurality of stator tooth grooves;

The energy storage ring is coaxially sleeved with the outer ring and the inner ring, an oil cavity for accommodating the part of the winding extending out of the stator tooth slot is formed between the outer ring and the inner ring, and the oil cavity is communicated with a plurality of oil passing grooves; the end face of the outer ring, which faces the stator along the axial direction of the outer ring, is at least partially connected with the axial end face of the stator, and the end face of the inner ring, which faces the bushing along the axial direction of the inner ring, is at least partially connected with the axial end face of the bushing.

Optionally, the outer ring is along its axial end face that keeps away from the stator with the inner ring is along its axial end face that keeps away from the bush is connected through shutoff portion, outer ring, inner ring and at least one of shutoff portion have seted up with oil inlet that the oil pocket communicates.

Optionally, the oil cavity is an annular groove structure coaxially arranged with the energy storage ring.

Optionally, the device further comprises a sealing plate coaxially arranged with the energy storage ring and the bushing, wherein the sealing plate is of an annular structure, is connected with the axial end face of the bushing, and is positioned between the energy storage ring and the bushing;

The end face of the outer ring, which faces the stator along the axial direction, is at least partially connected with the outer edge of the sealing plate, the end face of the inner ring, which faces the bushing along the axial direction, is at least partially connected with the inner edge of the sealing plate, and the end face of the sealing plate, which faces the stator, is attached to the axial end face of the stator;

the sealing plate is provided with oil passing holes corresponding to the oil passing grooves one by one along the circumferential direction, and the oil passing holes are used for communicating the oil cavities with the oil passing grooves.

Optionally, the shape of the oil passing hole is matched with the shape of the axial end face of the oil passing groove, and in the axial direction of the sealing plate, the projection of the oil passing groove is located in the projection range of the oil passing hole.

Optionally, the sealing plate is an elastic structure.

Optionally, the sealing plate is integrally formed with the bushing.

Optionally, a first annular groove is formed in the end face, facing the stator, of the outer ring along the axial direction of the outer ring; the end face of the inner ring, which faces the bushing along the axial direction of the inner ring, is provided with a second annular groove; and a first sealing ring and a second sealing ring are correspondingly arranged in the first annular groove and the second annular groove.

Optionally, a third clamping groove matched with the outer ring in a clamping way is formed in the sealing plate, and the outer ring is clamped with the third clamping groove to form a first sealing structure; the sealing plate is provided with a fourth clamping groove matched with the inner ring in a clamping way, and the inner ring is clamped with the fourth clamping groove to form a second sealing structure.

Optionally, the bushing is disposed along an outer surface of a peripheral side thereof in contact with the stator to isolate each of the oil passing grooves.

In a second aspect, the present disclosure provides a motor, including a motor oil cooling structure as described above, and further including a housing, where a step that abuts against the energy storage ring is provided on the housing.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

According to the motor oil cooling structure, through the arrangement of the bushing, the space where the stator is located and the rotor mounting cavity are divided into two independent cavities, meanwhile, an oil passing groove for cooling the winding is formed between the stator and the bushing, it can be understood that the stator tooth slot belongs to a part of the oil passing groove, the oil cavity is communicated with the oil passing groove, cooling oil can flow along the extending direction of the winding and cools the winding through the stator tooth slot in the oil passing groove, and the cooling oil can also cool the stator at the contact position of the cooling oil when flowing in the oil passing groove, so that the cooling efficiency of the whole motor is improved; it should be appreciated that the end portions of the windings that extend out of the stator slots may be immersed in cooling oil within the oil cavity at all times.

According to the motor oil cooling structure, the bushing is arranged between the stator and the rotor, the peripheral outer surface of the bushing and the plurality of stator tooth grooves form a plurality of oil passing grooves, and it is understood that the stator tooth grooves belong to part of the oil passing grooves, that is, the windings in the stator tooth grooves are also positioned in the oil passing grooves; the energy storage ring comprises an outer ring and an inner ring which are coaxially arranged, the end face of the outer ring, which faces the stator along the axial direction, is at least partially connected with the axial end face of the stator, the end face of the inner ring, which faces the bushing along the axial direction, is at least partially connected with the axial end face of the bushing, an oil cavity is formed between the outer ring and the inner ring, and the oil cavity is communicated with a plurality of oil passing grooves; therefore, the winding extending out of the stator tooth slot can be soaked in the oil cavity and cooled by the cooling oil, the cooling oil can also enter the oil groove from the oil cavity, the cooling oil can contact with the winding after entering the oil groove, the winding is cooled, and the cooling oil can also contact with the inner wall of the stator tooth slot to cool the stator, so that the cooling efficiency of the whole motor is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of an oil cooling structure of a motor according to an embodiment of the disclosure;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of an energy storage ring in an oil cooling structure of a motor according to an embodiment of the disclosure;

Fig. 4 is a schematic structural view of a bushing and a sealing plate in an oil cooling structure of a motor according to an embodiment of the disclosure.

Wherein, 1, energy storage ring; 11. an oil inlet; 121. an outer ring; 122. an inner ring; 13. an oil chamber; 141. a first annular groove; 142. a second annular groove; 15. a blocking part; 161. a first seal ring; 162. a second seal ring; 2. a bushing; 31. a stator; 311. stator tooth slots; 32. a rotor mounting cavity; 33. a winding; 4. passing through an oil groove; 5. a sealing plate; 51. an oil passing hole; 6. a housing; 61. a step.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

Based on this, this embodiment provides a motor oil cooling structure and motor, through the setting of bush, divide into two independent cavities with the space that the stator is located and rotor installation cavity, simultaneously form the oil groove that crosses that is used for cooling winding between stator and bush, it should be understood that stator tooth groove belongs to and crosses the oil groove, the cooling oil can flow along the extending direction of winding and cool down the winding from between outer loop and the inner loop in the end face breach of stator tooth groove entering to cross the oil groove, the cooling oil also can cool down with the stator of its contact position when crossing the oil groove and flowing, thereby improve the cooling efficiency of whole motor; it should be appreciated that the end portions of the windings that extend out of the stator slots may be immersed in cooling oil within the oil cavity at all times. The following is a detailed description of the present invention by way of specific examples:

Referring to fig. 1 to 4, the motor oil cooling structure provided in this embodiment includes an energy storage ring 1 and a bushing 2 coaxially disposed along an axial direction of a motor; the bushing 2 is coaxially sleeved between the stator 31 and the rotor, wherein the energy storage ring 1 and the bushing 2 can be mounted on the shell 6 of the motor or the stator 31 or the rotor, as can be seen in fig. 1, the bushing 2 separates the stator 31 and the rotor mounting cavity 32 into two chambers, and a plurality of oil passing grooves 4 are correspondingly formed between the outer surface of the bushing 2 along the peripheral side and the plurality of stator tooth grooves 311; the energy storage ring 1 comprises an outer ring 121 and an inner ring 122 coaxially sleeved, an oil cavity 13 for accommodating the part of the winding 33 extending out of the stator tooth slot 311 is formed between the outer ring 121 and the inner ring 122, and the oil cavity 13 is communicated with a plurality of oil passing grooves 4; the end face of the outer ring 121 facing the stator 31 in its axial direction is at least partially connected to the axial end face of the stator 31, and the end face of the inner ring 122 facing the liner 2 in its axial direction is at least partially connected to the axial end face of the liner 2.

In the motor oil cooling structure provided in this embodiment, by disposing the bushing 2 between the stator 31 and the rotor, the peripheral outer surface of the bushing 2 and the plurality of stator slots 311 form a plurality of oil passing slots 4, and it should be understood that the stator slots 311 are part of the oil passing slots 4, that is, the windings in the stator slots 311 are also located in the oil passing slots 4; the energy storage ring 1 comprises an outer ring 121 and an inner ring 122 which are coaxially arranged, wherein the end surface of the outer ring 121, which faces the stator 31 along the axial direction, is at least partially connected with the axial end surface of the stator 31, the end surface of the inner ring 122, which faces the bushing along the axial direction, is at least partially connected with the axial end surface of the bushing 2, an oil cavity 13 is formed between the outer ring 121 and the inner ring 122, and the oil cavity 13 is communicated with a plurality of oil passing grooves 4; so, stretch out in the winding of stator tooth's socket 311 can soak in the oil pocket, cooled by the cooling oil, the cooling oil also can get into oil groove 4 from oil pocket 13, and the cooling oil can contact with the winding after getting into oil groove 4, cools down the cooling to the winding, and the cooling oil also can contact with the inner wall of stator tooth's socket 311, cools down stator 31 to the cooling efficiency of whole motor has been improved.

In some embodiments, the end surface of the outer ring 121 far from the stator 31 along the axial direction thereof and the end surface of the inner ring 122 far from the bushing 2 along the axial direction thereof are connected by the blocking portion 15, and at least one of the outer ring 121, the inner ring 122 and the blocking portion 15 is provided with the oil inlet 11 communicating with the oil chamber 13; through the setting of shutoff portion 15, make whole energy storage ring 1 form a unilateral axial terminal surface and offer the annular structure of recess, the three lateral wall of recess is inner ring 122, outer loop 121 and shutoff portion 15 respectively, and the axial port butt is on stator 31 and bush 2, forms oil pocket 13.

With continued reference to fig. 1-3, the oil chamber 13 is an annular groove structure coaxially disposed with the energy storage ring 1; that is, the oil chamber 13 can provide cooling oil soaking spaces for the ends of all the windings 33 arranged in the circumferential direction, thereby remarkably improving the cooling effect of the windings 33, and the arrangement can also more flexibly select the opening position of the oil inlet 11; it should be understood that the number of oil inlets 11 may be plural, and that the oil inlets 11 may be provided on either the axial end face of the accumulator ring 1, i.e. the blocking portion 15, or the circumferential side wall of the accumulator ring 1, i.e. the inner ring 122 or the outer ring 121.

In some embodiments, the bushing 2 is disposed along its peripheral outer surface in conforming relation with the stator 31 to isolate each of the oil channels 4; the arrangement can avoid the temperature rise of the windings 33 to influence the windings 33 in other stator tooth grooves 311 through the cooling oil, can provide a diversion effect for the oil passing groove 4, ensures that the cooling oil can flow through rapidly along a set direction, improves the cooling efficiency, and can reduce the probability of the cooling oil forming turbulent flow in the oil passing groove 4.

In some embodiments, the oil inlet 11 is formed on the plugging portion 15, specifically, the oil inlet 11 is arranged opposite to the oil passing groove 4 in the axial direction of the motor, so that the cooling oil flowing into the oil cavity 13 from the oil inlet 11 can directly flow to the oil passing groove 4, the whole oil inlet route is more reasonable, and the probability of forming turbulent flow in the oil cavity 13 by the cooling oil is further reduced.

With continued reference to fig. 1, 2 and 4, the motor oil cooling structure further comprises a sealing plate 5 coaxially arranged with the energy storage ring 1 and the bushing 2, wherein the sealing plate 5 is of an annular structure, and the sealing plate 5 is connected with the axial end face of the bushing 2 and is positioned between the energy storage ring 1 and the bushing 2; the end face of the outer ring 121 facing the stator 31 along the axial direction is at least partially connected with the outer edge of the sealing plate 5, the end face of the inner ring 122 facing the bushing 2 along the axial direction is at least partially connected with the inner edge of the sealing plate 5, and the end face of the sealing plate 5 facing the stator 31 is in fit arrangement with the axial end face of the stator 31; the sealing plate 5 is provided with oil passing holes 51 which are in one-to-one correspondence with the plurality of oil passing grooves 4 along the circumferential direction, and the oil passing holes 51 are used for communicating the oil cavity 13 with the oil passing grooves 4; through the setting of closing plate 5, can further improve the sealed effect of sealing department between energy storage ring 1 and bush 2 and the stator 31, wherein, the axial terminal surface of closing plate 5 both sides all can carry out the adaptability processing with the terminal surface shape of energy storage ring 1 and stator 31, makes the junction of closing plate 5 and energy storage ring 1 and the junction of closing plate 5 and stator 31 inseparabler, stable.

In some embodiments, the shape of the oil passing hole 51 matches the shape of the axial end face of the oil passing groove 4, and the projection of the oil passing groove 4 in the axial direction of the sealing plate 5 is located within the projection range of the oil passing hole 51; this arrangement prevents the oil passing hole 51 from interfering with the oil passing through the oil groove 4, and ensures the oil feeding efficiency of the oil passing groove 4.

In a further embodiment, the sealing plate 5 is of an elastic structure, wherein the sealing plate 5 may be made of plastic, rubber or other elastic material, and the sealing effect of the sealing plate 5 can be further improved by utilizing the extrusion between the energy storage ring 1 and the stator 31.

In some embodiments, the sealing plate 5 and the bushing 2 are integrally formed, specifically, the sealing plate 5 and the bushing 2 may be made of the same material or different materials, and the sealing plate 5 and the bushing 2 may be connected into an integral structure by injection molding, bonding or other modes, or may be directly formed into an integral structure by casting, so that the sealing effect of the joint between the sealing plate and the bushing can be ensured, and meanwhile, the number of parts can be reduced, and the structure is simplified.

With continued reference to fig. 1 to 3, the outer ring 121 is provided with a first annular groove 141 on an end face thereof facing the stator 31 in the axial direction; the end face of the inner ring 122 facing the bushing 2 along the axial direction is provided with a second annular groove 142; a first sealing ring 161 and a second sealing ring 162 are correspondingly arranged in the first annular groove 141 and the second annular groove 142; it should be appreciated that the first sealing ring 161 is deformed by being pressed at the outer edges of the first annular groove 141 and the sealing plate 5 to form a first sealing structure, and the second sealing ring 162 is deformed by being pressed at the inner edges of the second annular groove 142 and the sealing plate 5 to form a second sealing structure; through the arrangement of the first annular groove 141, the second annular groove 142, the first sealing ring 161 and the second sealing ring 162, the cooling oil in the oil cavity 13 can be prevented from leaking to other positions in the motor, the cooling oil entering from the oil inlet 11 can flow along the oil passing groove 4, the winding 33 is effectively cooled, and the cooling efficiency of the winding 33 is obviously improved.

In some embodiments, the sealing plate 5 is provided with a third clamping groove in clamping fit with the outer ring 121, and the outer ring 121 is clamped with the third clamping groove to form a first sealing structure; the sealing plate 5 is provided with a fourth clamping groove matched with the inner ring 122 in a clamping way, and the inner ring 122 is clamped with the fourth clamping groove to form a second sealing structure; through the setting of third draw-in groove and fourth draw-in groove, not only can improve the sealed effect of the position department that outer loop 121 and inner loop 122 are used for sealed, also can provide preliminary installation station for outer loop 121 and inner loop 122 simultaneously, prevent that outer loop 121 and inner loop 122 from frequently dropping to the motor inside when the installation.

In a second aspect, the present disclosure provides a motor, including a motor oil cooling structure as described above, and further including a housing 6, where a step 61 that abuts against the energy storage ring 1 is provided on the housing 6; it should be noted that, the step 61 may abut against an axial end surface of the energy storage ring 1 and/or abut against a circumferential side surface of the energy storage ring 1, specifically may be determined with a direction of an extrusion force applied by the outer ring 121 and the inner ring 122 to the sealing plate 5, that is, when the extrusion force applied by the outer ring 121 and the inner ring 122 to the sealing plate 5 is an axial force, the step 61 may be designed to abut against the axial end surface of the energy storage ring 1, so as to ensure that the outer ring 121 and the inner ring 122 are always in an extrusion state, thereby ensuring that the outer ring 121 and the inner ring 122 are always in an extrusion state, forming a sealing structure on both sides, and providing axial support and limit.

The specific implementation manner and implementation principle are the same as those of the above embodiment, and the same or similar technical effects can be brought, which are not described in detail herein, and specific reference may be made to the description of the above motor oil cooling structure embodiment.

It should be noted that in this document, 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. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. The motor oil cooling structure is characterized by comprising an energy storage ring and a bushing, wherein the energy storage ring and the bushing are coaxially arranged along the axial direction of a motor, the bushing is coaxially sleeved between a stator and a rotor, and a plurality of oil passing grooves are correspondingly formed between the outer surface of the bushing along the circumferential side and a plurality of stator tooth grooves;

The energy storage ring comprises an outer ring and an inner ring which are coaxially sleeved, an oil cavity for accommodating the part of the winding extending out of the stator tooth slot is formed between the outer ring and the inner ring, and the oil cavity is communicated with a plurality of oil passing grooves; the end face of the outer ring, which faces the stator along the axial direction of the outer ring, is at least partially connected with the axial end face of the stator, and the end face of the inner ring, which faces the bushing along the axial direction of the inner ring, is at least partially connected with the axial end face of the bushing.

2. The motor oil cooling structure according to claim 1, wherein an end face of the outer ring which is far from the stator in an axial direction thereof and an end face of the inner ring which is far from the bushing in an axial direction thereof are connected by a blocking portion, and at least one of the outer ring, the inner ring and the blocking portion is provided with an oil inlet which communicates with the oil chamber.

3. The motor oil cooling structure according to claim 1, wherein the oil chamber is an annular groove structure coaxially arranged with the energy storage ring.

4. The motor oil cooling structure according to any one of claims 1 to 3, further comprising a sealing plate coaxially disposed with the energy storage ring and the bushing, the sealing plate being of an annular structure, the sealing plate being connected to an axial end face of the bushing and being located between the energy storage ring and the bushing;

The end face of the outer ring, which faces the stator along the axial direction, is at least partially connected with the outer edge of the sealing plate, the end face of the inner ring, which faces the bushing along the axial direction, is at least partially connected with the inner edge of the sealing plate, and the end face of the sealing plate, which faces the stator, is attached to the axial end face of the stator;

the sealing plate is provided with oil passing holes corresponding to the oil passing grooves one by one along the circumferential direction, and the oil passing holes are used for communicating the oil cavities with the oil passing grooves.

5. The motor oil cooling structure according to claim 4, wherein the shape of the oil passing hole matches the shape of the axial end face of the oil passing groove, and the projection of the oil passing groove is located within the projection range of the oil passing hole in the axial direction of the sealing plate.

6. The motor oil cooling structure according to claim 4, wherein the sealing plate is an elastic structure.

7. The motor oil cooling structure according to claim 4, wherein the seal plate is integrally formed with the bushing.

8. The motor oil cooling structure according to claim 4, wherein the outer ring is provided with a first annular groove along an end face of the outer ring facing the stator in an axial direction; the end face of the inner ring, which faces the bushing along the axial direction of the inner ring, is provided with a second annular groove; and a first sealing ring and a second sealing ring are correspondingly arranged in the first annular groove and the second annular groove.

9. The motor oil cooling structure according to claim 4, wherein a third clamping groove matched with the outer ring in a clamping way is formed in the sealing plate, and the outer ring is clamped with the third clamping groove to form a first sealing structure; the sealing plate is provided with a fourth clamping groove matched with the inner ring in a clamping way, and the inner ring is clamped with the fourth clamping groove to form a second sealing structure.

10. The motor oil cooling structure according to claim 1, wherein the bushing is fitted to the stator along an outer surface of a peripheral side thereof to isolate each of the oil passing grooves.

11. An electric machine comprising the electric machine oil cooling structure as claimed in any one of claims 1 to 10, and further comprising a housing provided with a step against the energy storage ring.