Motor cooling mechanism and motor

Abstract

The embodiment of the invention discloses a motor cooling mechanism and a motor, the motor at least comprises a stator iron core, a winding arranged on the stator iron core and a casing wrapping the stator iron core, the winding at least comprises end windings located at two ends of the stator iron core and a middle winding located in a stator groove, and the motor cooling mechanism comprises a first flow channel, a second flow channel and a third flow channel, the stator core is formed between the peripheral wall of the stator core and the casing, and at least part of the stator core extends in the circumferential direction of the peripheral wall of the stator core; the second flow channel is formed in the side wall of the stator iron core and extends in the axial direction of the stator iron core, the second flow channel is communicated with the first flow channel, and the second flow channel is provided with a first opening and a second opening which are formed in the two axial end faces of the stator iron core respectively; cooling liquid sequentially flows through the first flow channel and the second flow channel and then is jetted to the end winding through the first opening and the second opening. According to the embodiment of the invention, omnibearing cooling of the stator core, the intermediate winding and the end winding can be realized, and the cooling effect of the oil-cooled motor is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor cooling, and in particular to a motor cooling mechanism and a motor. Background Art

[0002] As new energy vehicle drive motors continue to develop towards higher speed, higher power, higher torque, smaller size and lighter weight, increasingly stringent requirements are placed on the heat dissipation performance of the drive motors.

[0003] The stator cooling method of the oil-cooled drive motor currently on the market is mainly to set a flow channel on the outer circle of the stator to cool the iron core. The oil flowing through the outer circle of the stator then enters the oil spray ring set at both ends of the stator, and sprays the windings at the ends of the stator through the oil spray holes on the oil spray ring to cool the windings. This cooling method is the current mainstream oil cooling solution. Although this cooling method solves the motor cooling problem well and greatly improves the cooling efficiency of the motor compared to water cooling, it does not solve the cooling problem of the copper wire in the stator slot (i.e., the middle winding). As we all know, the hot spot of the flat wire motor is located on the copper wire in the stator slot of the motor. To greatly improve the performance of the motor, it is necessary to consider the cooling of the copper wire in the stator slot while cooling the stator core and the end windings. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a motor cooling mechanism that can cool the stator core, the middle winding and the end winding at the same time to improve the cooling performance of the motor.

[0005] In a first aspect, the present application provides a motor cooling mechanism, wherein the motor comprises at least a stator core 100, a winding wound on the stator core 100, and a housing 200 wrapped around the stator core 100, wherein the winding comprises at least end windings located at both ends of the stator core 100, and the motor cooling mechanism comprises:

[0006] A first flow channel 300 is formed between the outer peripheral wall of the stator core 100 and the housing 200 and at least partially extends along the circumferential direction of the outer peripheral wall of the stator core 100;

[0007] The second flow channel 400 is formed inside the side wall of the stator core 100 and extends along the axial direction of the stator core 100. The second flow channel 400 is connected to the first flow channel 300. The second flow channel 400 has a first opening 410 and a second opening 420 respectively opened on the two axial end faces of the stator core 100. The cooling liquid flows through the first flow channel 300 and the second flow channel 400 in sequence, and then sprays onto the end winding through the first opening 410 and the second opening 420.

[0008] Through the embodiment of the present application, a first flow channel 300 is set on the outer wall of the stator core 100 so that the stator core 100 is cooled when the cooling liquid flows through the first flow channel 300, and a second flow channel 400 is set inside the side wall of the stator core 100 so that the intermediate winding in the stator core 100 is cooled when the cooling liquid flows through the second flow channel 400, and after the cooling liquid sprays onto the end winding through the first opening 410 and the second opening 420, the end winding can be cooled, thereby realizing all-round cooling of the stator core, the intermediate winding and the end winding, and greatly improving the cooling effect of the oil-cooled motor.

[0009] In one embodiment of the motor cooling mechanism, the first flow channel 300 includes a first circumferential flow channel 310, a second circumferential flow channel 320 and a third circumferential flow channel 330 which are sequentially connected and extend along the circumferential direction of the outer peripheral wall of the stator core 100;

[0010] The first circumferential flow channel 310 and the second circumferential flow channel 320 are respectively arranged near the two axial ends of the stator core 100 , the third circumferential flow channel 330 is arranged between the first circumferential flow channel 310 and the second circumferential flow channel 320 , and the third circumferential flow channel 330 is connected to the second flow channel 400 .

[0011] Through the embodiment of the present application, the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 are used to cover the entire surface of the outer peripheral wall of the stator core 100, thereby greatly improving the cooling effect of the stator core.

[0012] In one embodiment of the motor cooling mechanism, the first flow channel 300 further includes:

[0013] A first transition section 340 connecting the first circumferential flow channel 310 and the second circumferential flow channel 320;

[0014] The second transition section 350 connects the second circumferential flow channel 320 and the third circumferential flow channel 330 .

[0015] Through the embodiment of the present application, after the cooling liquid flows along the first circumferential flow channel 310, it is converted into the second circumferential flow channel 320 at the tail of the first circumferential flow channel 310 through the first transition section 340. After the cooling liquid flows along the second circumferential flow channel 320, it is converted into the third circumferential flow channel 330 at the tail of the second circumferential flow channel 320 through the second transition section 350, thereby realizing the sequential connection of the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330.

[0016] In one embodiment of the motor cooling mechanism described above, the first transition section 340 and the second transition section 350 extend along the axial direction of the stator core 100 on the outer peripheral wall of the stator core 100 .

[0017] In one embodiment of the above motor cooling mechanism, the first flow channel 300 further includes:

[0018] A first blocking member 360 is disposed between the first circumferential flow channel 310 and the first transition section 340 and the third circumferential flow channel 330, and is used to isolate the first circumferential flow channel 310, the first transition section 340 and the third circumferential flow channel 330;

[0019] A second blocking member 370, disposed between the second circumferential flow channel 320 and the third circumferential flow channel 330, for isolating the second circumferential flow channel 320 from the third circumferential flow channel 330;

[0020] The first stopper 360 and the second stopper 370 are interference-fitted with the housing 200 at one side close to the housing 200 .

[0021] In the embodiment of the present application, the first blocking member 360 is used to isolate the first circumferential flow channel 310, the first transition section 340 and the third circumferential flow channel 330, and the second blocking member 370 is used to isolate the second circumferential flow channel 320 from the third circumferential flow channel 330. This is because the first circumferential flow channel 310 and the second circumferential flow channel 320 are located at the upper and lower ends of the stator core 100 in the axial direction, and the third circumferential flow channel 330 is located in the middle axial part of the stator core 100. The first circumferential flow channel 310 and the second circumferential flow channel 320 are connected through the first transition section 340 at the tail of the first circumferential flow channel 310, and must cross the third circumferential flow channel 330 located in the middle. Therefore, the third circumferential flow channel 330 and the first transition section 340 must also be designed to be isolated and cannot be connected to each other.

[0022] In one embodiment of the above motor cooling mechanism, a plurality of bosses 380 are further formed on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320 .

[0023] Through the embodiments of the present application, by utilizing a plurality of bosses 380 disposed on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320 , the contact area with the cooling liquid can be greatly increased, thereby improving the cooling effect.

[0024] In one embodiment of the motor cooling mechanism described above, the plurality of bosses 380 are arranged on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320 according to a preset rule.

[0025] In one embodiment of the motor cooling mechanism described above, the boss 380 is in any one of a hexahedral structure, a hemispherical structure or a conical structure.

[0026] In one embodiment of the above motor cooling mechanism, the third circumferential flow channel 330 is located in the middle of the second flow channel 400 .

[0027] By arranging the third circumferential flow channel 330 to be located in the middle of the second flow channel 400 , it is possible to ensure that the amount of cooling liquid sprayed to the two end windings is the same.

[0028] In one embodiment of the above-mentioned motor cooling mechanism, the third circumferential flow channel 330 includes a first part 331 and a second part 332 which are interconnected, the first part 331 is exposed on the outer peripheral wall of the stator core 100, and the second part 332 is arranged inside the stator core 100 and located below the first transition section 340.

[0029] In one embodiment of the above motor cooling mechanism, the first portion 331 is in a stepped groove structure, and the second portion 332 is in a long hole structure.

[0030] In one embodiment of the above-mentioned motor cooling mechanism, a plurality of stator slots 110 are opened in the circumferential direction of the stator core 100 , and the second flow channels 400 include a plurality of second flow channels 400 , and each of the second flow channels 400 is formed inside the side wall of the stator core 100 and is located between two adjacent stator slots 110 .

[0031] By disposing each second flow channel 400 between two adjacent stator slots 110 , the cooling effect on the intermediate winding disposed in the stator slot 110 is further improved.

[0032] In one embodiment of the motor cooling mechanism described above, the second flow channel 400 is located at the yoke 120 of the stator core 100;

[0033] Or, the second flow channel 400 is located at the tooth portion 130 of the stator core 100;

[0034] Alternatively, the second flow channel 400 is partially located at the yoke 120 of the stator core 100 , and partially located at the teeth 130 of the stator core 100 .

[0035] In one embodiment of the motor cooling mechanism described above, the housing 200 is interference fit with the outer peripheral wall of the stator core 100 .

[0036] By setting an interference fit between the housing 200 and the outer circumferential wall of the stator core 100, the cooling liquid is ensured to flow along the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 in sequence, avoiding the cooling liquid from flowing into other flow channels during the circulation process.

[0037] In one embodiment of the above motor cooling mechanism, the motor cooling mechanism further includes a liquid inlet hole 500 provided on the housing 200 , and the liquid inlet hole 500 is located at a position of the housing 200 corresponding to the first circumferential flow channel 310 .

[0038] In a second aspect, the present application provides a motor, comprising a motor cooling mechanism as described in any one of the first aspects.

[0039] One or more of the above embodiments of the present application have at least one or more of the following beneficial effects:

[0040] In the embodiment of the present application, a first flow channel 300 is provided on the outer peripheral wall of the stator core 100 so that the stator core 100 is cooled when the cooling liquid flows through the first flow channel 300, and a second flow channel 400 is provided inside the side wall of the stator core 100 so that the intermediate winding in the stator core 100 is cooled when the cooling liquid flows through the second flow channel 400, and after the cooling liquid sprays onto the end winding through the first opening 410 and the second opening 420, the end winding can be cooled, thereby achieving all-round cooling of the stator core, the intermediate winding, and the end winding, greatly improving the cooling effect of the oil-cooled motor;

[0041] Furthermore, the solution of the present application does not require an oil injection ring, and the first opening and the second opening at both ends of the second flow channel are just opposite to the end winding, so the cooling liquid can be directly sprayed onto the end winding to cool it.

[0042] Furthermore, aluminum alloy materials are key component materials for new energy vehicle motors. In order to achieve higher efficiency and higher speed, cast aluminum rotors are required to have higher conductivity and strength. The stator and housing of this patent are made of aluminum alloys made from recycled aluminum with high conductivity and excellent mechanical properties.

[0043] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0045] Figure 1 is a structural schematic diagram of a motor provided in an embodiment of the present application;

[0046] Figure 2 is a structural schematic diagram of another viewing direction of the motor provided in an embodiment of the present application; Figure 3 It is a three-dimensional structural schematic diagram of the stator core and the motor cooling mechanism provided in the embodiment of the present application;

[0047] Figure 4 is a structural schematic diagram of a stator core provided in an embodiment of the present application from one viewing direction;

[0048] Figure 5 is a cross-sectional view of a first circumferential flow channel provided in an embodiment of the present application;

[0049] Figure 6 is a cross-sectional view of a second circumferential flow channel provided in an embodiment of the present application;

[0050] Figure 7 is a cross-sectional view of a third circumferential flow channel provided in an embodiment of the present application;

[0051] Figure 8 is a partial enlarged view of the third circumferential flow channel provided in an embodiment of the present application;

[0052] Fig. 9 It is a cross-sectional view of the second flow channel provided in an embodiment of the present application.

[0053] Description of Reference Numerals

[0054] 100, stator core; 110, stator slot; 120, yoke; 130, tooth; 200, housing; 300, first flow channel; 310, first circumferential flow channel; 320, second circumferential flow channel; 330, third circumferential flow channel; 331, first part; 332, second part; 340, first transition section; 350, second transition section; 360, first blocking member; 361, first section; 362, second section; 370, second blocking member; 380, boss; 400, second flow channel; 410, first opening; 420, second opening; 500, liquid inlet hole; 600, liquid inlet area. DETAILED DESCRIPTION

[0055] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0056] As described in the background technology, the stator cooling method of the current oil-cooled driving motor on the market is mainly to provide a flow channel on the outer circle of the stator to cool the iron core. The oil flowing through the outer circle of the stator then enters the oil spray rings provided at both ends of the stator, and sprays the windings at the ends of the stator through the oil spray holes on the oil spray rings to cool the windings. This cooling method is the current mainstream oil cooling solution. Although this cooling method solves the motor cooling problem well and greatly improves the cooling efficiency of the motor compared to water cooling, it does not solve the cooling problem of the copper wire in the stator slot (i.e., the middle winding). As we all know, the hot spot of the flat wire motor is located on the copper wire in the stator slot of the motor. To greatly improve the performance of the motor, it is necessary to consider the cooling of the copper wire in the stator slot (i.e., the middle winding) while cooling the stator core and the end windings.

[0057] Based on this, the embodiment of the present application creatively proposes a new motor cooling mechanism, which can be configured by setting a first flow channel on the outer peripheral wall of the stator core so that the stator core can be cooled when the cooling liquid flows through the first flow channel, and by setting a second flow channel inside the side wall of the stator core so that the intermediate winding in the stator core can be cooled when the cooling liquid flows through the second flow channel. There is no need for an oil spray ring, and the end winding can be cooled by spraying the cooling liquid through the first opening and the second opening to the end winding, thereby realizing all-round cooling of the stator core, the intermediate winding and the end winding, greatly improving the cooling effect of the oil-cooled motor.

[0058] The present application will be described in detail below through specific embodiments.

[0059] Figure 1 is a schematic structural diagram of a motor provided in an embodiment of the present application. Figure 2 is a schematic diagram of the structure of another view of the motor provided in the embodiment of the present application, referring to Figure 1 and Figure 2 As shown, the motor generally includes a stator core 100 , a winding (not shown) and a housing 200 , wherein the winding (not shown) is wound on the stator core 100 , and the housing 200 is covered on the outside of the stator core 100 .

[0060] It can be understood that the stator core 100 includes a yoke 120 and a tooth portion 130. The tooth portion 130 of the stator core 100 is usually provided with a plurality of stator slots 110. The plurality of stator slots 110 are arranged at intervals along the circumference of the stator core 100. The extension direction of the stator slots 110 may be parallel to the axial direction of the stator core 100. The stator slots 110 may play a role in limiting and fixing, and the winding (not shown) may be wound on the stator core 100 through the stator slots 110. The winding (not shown) is usually composed of an intermediate winding (not shown) and an end winding (not shown), wherein the intermediate winding (not shown) is located in the stator slots 110, and the end winding (not shown) is located at both ends of the stator core 100.

[0061] Reference Figures 3 to 9 As shown, in the embodiment of the present application, the motor cooling mechanism includes a first flow channel 300 and a second flow channel 400 that are interconnected, wherein the first flow channel 300 is formed between the outer peripheral wall of the stator core 100 and the housing 200, and at least part of the first flow channel 300 extends along the circumferential direction of the outer peripheral wall of the stator core 100. The second flow channel 400 is formed inside the side wall of the stator core 100 and extends along the axial direction of the stator core 100, and the opposite ends of the second flow channel 400 have a first opening 410 and a second opening 420, respectively, and the first opening 410 and the second opening 420 are opened on two axial end faces of the stator core 100. During specific implementation, the cooling liquid first flows through the outer wall of the stator core 100 through the first flow channel 300 to cool the stator core 100, and then flows from the first flow channel 300 into the second flow channel 400 inside the side wall of the stator core 100 to cool the intermediate winding (not shown) located in the stator slot 110. Finally, the cooling liquid sprays from the second flow channel 400 through the first opening 410 and the second opening 420 to the end windings (not shown) located at both ends of the stator core 100 to cool the end windings (not shown), thereby achieving all-round cooling of the stator core, the intermediate winding, and the end windings, greatly improving the cooling effect of the oil-cooled motor.

[0062] It should be noted that the cooling liquid in the embodiment of the present application is preferably cooling oil. Compared with water cooling, oil cooling can greatly improve the cooling efficiency of the motor.

[0063] Further references Figures 3 to 9 As shown, as a preferred embodiment, in the embodiment of the present application, the first flow channel 300 is composed of at least a first circumferential flow channel 310, a second circumferential flow channel 320 and a third circumferential flow channel 330 which are connected in sequence, and the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 all extend along the circumferential direction of the outer peripheral wall of the stator core 100. The first circumferential flow channel 310 and the second circumferential flow channel 320 are respectively arranged near the two ends of the axial direction of the stator core 100, and the third circumferential flow channel 330 is arranged between the first circumferential flow channel 310 and the second circumferential flow channel 320, that is, the first circumferential flow channel 310, the third circumferential flow channel 330 and the second circumferential flow channel 320 are arranged in sequence on the outer peripheral wall of the stator core 100 along the axial direction of the stator core 100. The third circumferential flow channel 330 is connected with the second flow channel 400, so as to realize the connection between the first flow channel 300 and the second flow channel 400.

[0064] It can be understood that in order to improve the cooling effect on the stator core 100, in some specific embodiments, the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 completely cover the outer wall of the stator core 100 so as to increase the contact area between the cooling liquid and the stator core 100.

[0065] In some specific embodiments, the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 are all formed to surround the stator core 100 along the circumference of the stator core. Figure 3 and Figure 4 shown.

[0066] In other specific embodiments, the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 are all formed to surround the stator core 100 multiple times along the circumference, that is, the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 are spirally wrapped around the outer wall of the stator core 100.

[0067] Further references Figure 3 and Figure 4 As shown, in some specific embodiments, the first flow channel 300 further includes a first transition section 340 and a second transition section 350. It can be understood that the first transition section 340 and the second transition section 350 are also formed between the outer peripheral wall of the stator core 100 and the housing 200. The first transition section 340 is used to connect the first circumferential flow channel 310 and the second circumferential flow channel 320, and the second transition section 350 is used to connect the second circumferential flow channel 320 and the third circumferential flow channel 330.

[0068] It is understandable that in the embodiment of the present application, the specific shape and position of the first transition section 340 and the second transition section 350 are not limited, and can be set according to actual needs without violating the inventive concept of the present application. In some specific embodiments, the extension direction of the first transition section 340 is the same as the extension direction of the first circumferential flow channel 310 and the second circumferential flow channel 320, and the extension direction of the second transition section 350 is the same as the extension direction of the second circumferential flow channel 320 and the third circumferential flow channel 330. In other specific embodiments, the first transition section 340 is set at an angle to the first circumferential flow channel 310 and the second circumferential flow channel 320, and the second transition section 350 is set at an angle to the second circumferential flow channel 320 and the third circumferential flow channel 330.

[0069] In some specific embodiments, the first transition section 340 is disposed perpendicularly to the first circumferential flow channel 310 and the second circumferential flow channel 320, and the second transition section 350 is disposed perpendicularly to the second circumferential flow channel 320 and the third circumferential flow channel 330. Figure 2As shown, as a preferred example, the first circumferential flow channel 310, the second circumferential flow channel 320 and the third circumferential flow channel 330 extend along the circumference of the stator core 100 on the outer circumferential wall of the stator core 100, and the first transition section 340 and the second transition section 350 extend along the axial direction of the stator core 100 on the outer circumferential wall of the stator core 100. The first transition section 340 is arranged at the tail of the first circumferential flow channel 310, and the cooling liquid flows along the first circumferential flow channel 310, and then changes into the second circumferential flow channel 320 at the tail of the first circumferential flow channel 310 through the first transition section 340, and the second transition section 350 is arranged at the tail of the second circumferential flow channel 320, and then changes into the third circumferential flow channel 330 at the tail of the second circumferential flow channel 320 through the second transition section 350 after the cooling liquid flows along the second circumferential flow channel 320.

[0070] It is understandable that in the embodiment of the present application, the motor cooling mechanism further includes a liquid inlet hole 500. Figure 1 and Figure 2 As shown, the liquid inlet hole 500 is provided on the housing 200. As a preferred embodiment, in the embodiment of the present application, the liquid inlet hole 500 is located at a position of the housing 200 corresponding to the first circumferential flow channel 310. Further preferably, the liquid inlet hole 500 is located at a position of the housing 200 corresponding to the end of the first circumferential flow channel 310 away from the first transition section 340. Figure 3 As shown, the liquid inlet hole 500 corresponds to the liquid inlet area 600 on the first circumferential flow channel 310 .

[0071] So, refer to Figure 3 As shown in the direction indicated by the middle arrow, after the cooling liquid enters the first circumferential flow channel 310 through the liquid inlet hole 500, it goes around the stator core 100 along the first circumferential flow channel 310 for one circle and then enters the first transition section 340 located at the tail of the first circumferential flow channel 310, then enters the second circumferential flow channel 320 through the first transition section 340, goes around the stator core 100 along the second circumferential flow channel 320 for one circle and then enters the second transition section 350 located at the tail of the second circumferential flow channel 320, then enters the third circumferential flow channel 310 through the second transition section 350. After passing through the third circumferential flow channel 330, part of the cooling liquid continues to circle around the stator core 100 along the third circumferential flow channel 330, and part of the cooling liquid enters the second flow channel 400 connected to the third circumferential flow channel 330, flows along the axial direction of the stator core 100 in the second flow channel 400, and finally sprays onto the end windings through the first opening and the second opening arranged on the two axial end faces of the stator core 100, thereby realizing all-round cooling of the stator core, the middle winding and the end winding, greatly improving the cooling effect of the oil-cooled motor.

[0072] It can be understood that, since in the embodiment of the present application, the first circumferential flow channel 310 and the second circumferential flow channel 320 are located at the upper and lower ends of the stator core 100 in the axial direction, and the third circumferential flow channel 330 is located in the middle axial part of the stator core 100, the first transition section 340 for converting and connecting the first circumferential flow channel 310 and the second circumferential flow channel 320 must cross the third circumferential flow channel 330 located in the middle. Therefore, the third circumferential flow channel 330 and the first transition section 340 need to be isolated and cannot be connected to each other.

[0073] Based on the above reasons, in the embodiment of the present application, the first flow channel 300 further includes a first blocking member 360 and a second blocking member 370. Figure 3 As shown, the first blocking member 360 is arranged between the first circumferential flow channel 310 and the first transition section 340 and the third circumferential flow channel 330, and is used to isolate the first circumferential flow channel 310, the first transition section 340 and the third circumferential flow channel 330; the second blocking member 370 is arranged between the second circumferential flow channel 320 and the third circumferential flow channel 330, and is used to isolate the second circumferential flow channel 320 from the third circumferential flow channel 330.

[0074] Further references Figure 3 As shown, the first blocking member 360 includes a first section 361 and a second section 362. The first section 361 extends along the circumference of the stator core 100 on the outer circumferential wall of the stator core 100, and is used to isolate the first circumferential flow channel 310 and the third circumferential flow channel 330 along the extending direction of the first circumferential flow channel 310 and the third circumferential flow channel 330. The second section 362 extends along the axial direction of the stator core 100 on the outer circumferential wall of the stator core 100, and is used to isolate the first transition section 340 and the third circumferential flow channel 330. The second blocking member 370 extends along the circumferential direction of the stator core 100 on the outer circumferential wall of the stator core 100, and is used to isolate the second circumferential flow channel 320 and the third circumferential flow channel 330 along the extending direction of the second circumferential flow channel 320 and the third circumferential flow channel 330.

[0075] It should be noted that, in the embodiment of the present application, the connection relationship between the first blocking member 360 and the second blocking member 370 and the stator core 100 is not limited. In some specific embodiments, the first blocking member 360 and the second blocking member 370 are separate components, which are connected to the stator core 100; in some specific embodiments, the first blocking member 360 and the second blocking member 370 are integrally formed with the stator core 100, and the first blocking member 360 and the second blocking member 370 are formed on the outer peripheral wall of the stator core 100 in the radial direction of the stator core 100 and extend away from the stator core 100.

[0076] It can be understood that the first blocking member 360 and the second blocking member 370 are interference fit with the housing 200 at one side close to the housing 200 to prevent the cooling liquid from flowing into other circumferential flow channels when circulating in each circumferential flow channel.

[0077] As a preferred implementation, in the embodiment of the present application, a plurality of bosses 380 are further formed on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320. In some specific embodiments, the bosses 380 are integrally formed with the stator core 100, and the bosses 380 are formed on the outer peripheral wall of the stator core 100 along the radial direction of the stator core 100 and extend away from the stator core 100. It can be understood that by providing a plurality of bosses 380 on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320, the contact area with the cooling liquid can be greatly increased, thereby improving the cooling effect.

[0078] It should be noted that, in the embodiment of the present application, the arrangement of the bosses 380 on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320 is not limited, that is, the preset rules are not specifically limited, and they can be arranged according to actual needs without violating the inventive concept of the present application. For example, as an exemplary and non-restrictive explanation, in the embodiment of the present application, a plurality of bosses 380 can be staggered on the bottom wall of the first circumferential flow channel 310 and / or the second circumferential flow channel 320 to further increase the contact area with the cooling liquid and improve the cooling effect.

[0079] It should be noted that, in the embodiment of the present application, the shape and size of the boss 380 are not limited, and can be set according to actual needs without violating the inventive concept of the present application. For example, as an exemplary and non-restrictive description, in the embodiment of the present application, the boss 380 is any one of a hexahedral structure, a hemispherical structure or a conical structure. Preferably, the boss 380 is a rectangular parallelepiped structure.

[0080] Further references Figure 3 and Figure 4 As shown, as a preferred embodiment, in the embodiment of the present application, the third circumferential flow channel 330 is located in the middle of the second flow channel 400. It can be understood that by setting the third circumferential flow channel 330 to be located in the middle of the second flow channel 400, the amount of cooling liquid sprayed to the two end windings can be ensured to be the same, thereby improving the cooling effect.

[0081] It can be understood that, since the first circumferential flow channel 310 and the second circumferential flow channel 320 are located at the upper and lower ends of the stator core 100 in the axial direction, and the third circumferential flow channel 330 is located in the middle of the stator core 100 in the axial direction, the first transition section 340 for the first circumferential flow channel 310 and the second circumferential flow channel 320 to switch and communicate must cross the third circumferential flow channel 330 located in the middle. Therefore, in the embodiment of the present application, the third circumferential flow channel 330 is provided to include a first part 331 and a second part 332 that are connected to each other. Preferably, along the extension direction of the third circumferential flow channel 330, the length of the first part 331 is greater than the length of the second part 332.

[0082] Further references Figure 3 and Figure 8 As shown, the first portion 331 is exposed on the outer circumferential wall of the stator core 100, and the second portion 332 is arranged inside the stator core 100 and below the first transition section 340, so that the third circumferential flow channel 330 can be arranged around the stator core 100 along the circumference of the stator core 100, and the first transition section 340 can cross the third circumferential flow channel 330 located in the middle to achieve the connection between the first circumferential flow channel 310 and the second circumferential flow channel 320.

[0083] Further references Figure 3 and Figure 8 As shown, in some specific embodiments, the first portion 331 is a stepped groove structure, and the second portion is a long hole structure. It is understandable that by setting the first portion 331 to be a stepped groove structure, the cooling liquid entering the third circumferential flow channel 330 can continue to flow along the extension direction of the third circumferential flow channel 330, while part of the cooling liquid enters the second flow channel 400 connected to the third circumferential flow channel 330 during the circulation process, so as to cool the middle winding and the end winding.

[0084] Further references Figure 1 and Figure 3 As shown, as a preferred implementation, in the embodiment of the present application, the second flow channel 400 includes a plurality of second flow channels 400, which are arranged along the circumference of the stator core 100 inside the side wall of the stator core 100, and each second flow channel 400 is located between two adjacent stator slots 110. It can be understood that by arranging each second flow channel 400 between two adjacent stator slots 110, the cooling effect of the intermediate winding arranged in the stator slot 110 is further improved.

[0085] It should be noted that in the embodiment of the present application, the specific position of the second flow channel 400 inside the side wall of the stator core 100 is not specifically limited, and during specific implementation, it can be set according to actual product requirements.

[0086] In some specific embodiments, the second flow channel 400 is arranged to be located at the yoke 120 of the stator core 100, so as to avoid affecting the magnetic field in the motor, thereby affecting the working performance of the motor;

[0087] In other specific embodiments, the second flow channel 400 is arranged to be located at the tooth portion 130 of the stator core 100 to reduce the distance between the second flow channel 400 and the middle winding as much as possible, thereby further improving the cooling effect;

[0088] In other specific embodiments, the second flow channel 400 is configured to be partially located at the yoke 120 of the stator core 100 and partially located at the tooth 130 of the stator core 100, that is, the second flow channel 400 is configured to be located at the junction of the yoke 120 and the tooth 130 of the stator core 100.

[0089] Corresponding to the above-mentioned motor cooling mechanism, the embodiment of the present application also provides a motor, which includes a motor cooling mechanism as described in any of the above items. In order to obtain higher efficiency and achieve higher speed, cast aluminum is required to have higher conductivity and strength. This patent uses a method for preparing motor aluminum alloy using recycled aluminum, and the recycled aluminum is used to prepare new energy vehicle motors, including but not limited to motor housings and stators. The relevant processes and procedures for preparing aluminum alloys using recycled aluminum will not be repeated.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A motor cooling mechanism, the motor comprising at least a stator core (100), a winding wound on the stator core (100), and a housing (200) wrapped around the stator core (100), the winding comprising at least end windings located at both ends of the stator core (100), characterized in that: The motor cooling mechanism comprises: A first flow channel (300) is formed between the outer peripheral wall of the stator core (100) and the housing (200), and at least partially extends along the circumferential direction of the outer peripheral wall of the stator core (100); A second flow channel (400) is formed inside the side wall of the stator core (100) and extends along the axial direction of the stator core (100). The second flow channel (400) is connected to the first flow channel (300). The second flow channel (400) has a first opening (410) and a second opening (420) respectively opened on two axial end surfaces of the stator core (100). The cooling liquid flows through the first flow channel (300) and the second flow channel (400) in sequence, and then sprays onto the end winding through the first opening (410) and the second opening (420).

2. The motor cooling mechanism according to claim 1, characterized in that: The first flow channel (300) comprises a first circumferential flow channel (310), a second circumferential flow channel (320) and a third circumferential flow channel (330) which are connected in sequence and extend along the circumferential direction of the outer peripheral wall of the stator core (100); The first circumferential flow channel (310) and the second circumferential flow channel (320) are respectively arranged near the two axial ends of the stator core (100), the third circumferential flow channel (330) is arranged between the first circumferential flow channel (310) and the second circumferential flow channel (320), and the third circumferential flow channel (330) is connected to the second flow channel (400).

3. The motor cooling mechanism according to claim 2, characterized in that: The first flow channel (300) further includes: A first transition section (340) connecting the first circumferential flow channel (310) and the second circumferential flow channel (320); The second transition section (350) connects the second circumferential flow channel (320) and the third circumferential flow channel (330).

4. The motor cooling mechanism according to claim 3, characterized in that: The first transition section (340) and the second transition section (350) extend on the outer peripheral wall of the stator core (100) along the axial direction of the stator core (100).

5. The motor cooling mechanism according to claim 3, characterized in that: The first flow channel (300) further comprises: a first blocking member (360), disposed between the first circumferential flow channel (310) and the first transition section (340) and the third circumferential flow channel (330), and used to isolate the first circumferential flow channel (310), the first transition section (340) and the third circumferential flow channel (330); a second blocking member (370), disposed between the second circumferential flow channel (320) and the third circumferential flow channel (330), and used to isolate the second circumferential flow channel (320) from the third circumferential flow channel (330); The first blocking member (360) and the second blocking member (370) are interference-fitted with the housing (200) at a side close to the housing (200).

6. The motor cooling mechanism according to claim 2, characterized in that: A plurality of bosses (380) are also formed on the bottom wall of the first circumferential flow channel (310) and / or the second circumferential flow channel (320).

7. The motor cooling mechanism according to claim 6, characterized in that: The plurality of bosses (380) are arranged on the bottom wall of the first circumferential flow channel (310) and / or the second circumferential flow channel (320) according to a preset rule.

8. The motor cooling mechanism according to claim 6, characterized in that: The boss (380) is in any one of a hexahedral structure, a hemispherical structure or a conical structure.

9. The motor cooling mechanism according to claim 2, characterized in that: The third circumferential flow channel (330) is located in the middle of the second flow channel (400).

10. The motor cooling mechanism according to claim 3, characterized in that: The third circumferential flow channel (330) comprises a first part (331) and a second part (332) which are interconnected, wherein the first part (331) is exposed on the outer peripheral wall of the stator core (100), and the second part (332) is arranged inside the stator core (100) and below the first transition section (340).

11. The motor cooling mechanism according to claim 10, characterized in that: The first portion (331) is in a stepped groove structure, and the second portion (332) is in a long hole structure.

12. The motor cooling mechanism according to any one of claims 1 to 11, characterized in that: The stator core (100) is provided with a plurality of stator slots (110) in the circumferential direction, and the second flow channels (400) include a plurality of second flow channels (400), each of which is formed inside the side wall of the stator core (100) and located between two adjacent stator slots (110).

13. The motor cooling mechanism according to any one of claims 1 to 11, characterized in that: The second flow channel (400) is located at the yoke (120) of the stator core (100); Or, the second flow channel (400) is located at the tooth portion (130) of the stator core (100); Alternatively, the second flow channel (400) is partially located at the yoke (120) of the stator core (100), and partially located at the tooth (130) of the stator core (100).

14. The motor cooling mechanism according to claim 1, characterized in that: The housing (200) is interference-fitted with the outer peripheral wall of the stator core (100).

15. The motor cooling mechanism according to claim 2, characterized in that: The motor cooling mechanism further comprises a liquid inlet hole (500) provided on the housing (200), wherein the liquid inlet hole (500) is located at a position of the housing (200) corresponding to the first circumferential flow channel (310).

16. A motor, characterized in that: The motor cooling device comprises the motor cooling mechanism as claimed in any one of claims 1 to 15.

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