Stator cooling structure and motor

Abstract

The utility model discloses a stator cooling structure and a motor, the stator cooling structure comprises a stator core, the stator core is provided with a plurality of wire slots, the plurality of wire slots are arranged at intervals along the circumferential direction, each wire slot accommodates a plurality of stator windings, and the plurality of stator windings are arranged at intervals along the radial direction; the first injection molding body is arranged between the two stator windings which are arranged at an interval; the second injection molding body comprises a first wall and a second wall which are oppositely arranged, the first wall is attached to the multiple stator windings, and the first wall and the wire groove are arranged at intervals in the circumferential direction to form a first cooling channel; the second wall is attached to the plurality of stator windings, and the second wall and the wire slots are arranged at intervals in the circumferential direction to form a second cooling channel; and the third injection molding bodies are arranged at the two ends of the first cooling channel and the second cooling channel in the radial direction so as to seal the first cooling channel and the second cooling channel. According to the utility model, the stator cooling efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a stator cooling structure and a motor. Background Technology

[0002] As the power density requirements of motors become increasingly stringent, motor oil cooling is developing in a direction that is more direct and closer to the stator windings, in order to remove the heat generated by the stator windings to the greatest extent and improve cooling efficiency.

[0003] Current stator oil cooling solutions mainly involve stator core oil channel cooling. This solution requires adding miniature cooling slots to the stator laminations. These miniature cooling slots are radially spaced from the stator windings. Cooling oil flows through the cooling slots and carries away heat through the oil flow, resulting in low cooling efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problem of low stator cooling efficiency. This invention provides a stator cooling structure and motor that can improve stator cooling efficiency.

[0005] To solve the above-mentioned technical problems, an embodiment of this utility model discloses a stator cooling structure, comprising:

[0006] The stator core has multiple slots, which are spaced apart circumferentially. Each slot contains multiple stator windings, which are spaced apart radially.

[0007] A first injection molded body is disposed between two stator windings that are spaced apart;

[0008] The second injection molded body includes a first wall and a second wall disposed opposite to each other. The first wall is attached to the plurality of stator windings and is spaced apart from the wire groove along the circumferential direction to form a first cooling channel. The second wall is attached to the plurality of stator windings and is spaced apart from the wire groove along the circumferential direction to form a second cooling channel.

[0009] The third injection body is provided at both ends of the first cooling channel and the second cooling channel along the radial direction to seal the first cooling channel and the second cooling channel.

[0010] Using the above technical solution, the first injection-molded body is disposed between two stator windings spaced apart to isolate the two stator windings. The first wall and the second wall of the second injection-molded body are attached to multiple stator windings, and together with the first injection-molded body, they position and insulate the multiple stator windings. The first wall and the wire groove are spaced apart circumferentially to form a first cooling channel, and the second wall and the wire groove are spaced apart circumferentially to form a second cooling channel. Coolant passes through the first and second cooling channels to cool the multiple stator windings. The first and second cooling channels are separated from the multiple stator windings only by the thin first and second walls, so that the coolant can fully remove the heat from the multiple stator windings, improving cooling efficiency and cooling effect.

[0011] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a stator cooling structure, wherein the upper and lower ends of the first injection molded body are provided with a first arc segment for fixing the stator winding along the radial direction, and the first arc segment extends in the direction toward the stator winding.

[0012] Using the above technical solution, the upper and lower ends of the first injection molded body are provided with a first arc segment. The first arc segment extends in the direction toward the stator winding to fix the stator winding and enhance the fixing and limiting effect.

[0013] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a stator cooling structure, wherein both ends of the third injection molded body extend in the direction toward the stator winding to form a second arc segment along the circumferential direction.

[0014] Using the above technical solution, both ends of the third injection molded body extend in the direction toward the stator winding to form a second arc segment, so as to fix the stator winding and enhance the fixing and limiting effect.

[0015] According to another specific embodiment of the present invention, a stator cooling structure is disclosed. Along the circumferential direction, the two ends of the first injection molded body are provided with reinforcing plates. The reinforcing plates extend along the radial direction and are respectively connected to the first arc segment and the second injection molded body.

[0016] By adopting the above technical solution, reinforcing plates are set at both ends of the first injection body, and the reinforcing plates are respectively connected to the first arc segment and the second injection body, thereby increasing the stability of the connection between the first injection body and the second injection body.

[0017] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a stator cooling structure, wherein the third injection molded body includes a blocking portion that extends radially and is disposed at both ends of the first cooling channel and the second cooling channel.

[0018] By adopting the above technical solution, by setting a blocking part, and the blocking part being located at both ends of the first cooling channel and the second cooling channel to seal the first cooling channel and the second cooling channel, the coolant is ensured to flow in the first cooling channel and the second cooling channel without leakage.

[0019] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a stator cooling structure, wherein the first injection body includes a plurality of first injection bodies, and the plurality of first injection bodies are arranged at intervals along the radial direction.

[0020] This utility model also discloses an electric motor, comprising:

[0021] The stator includes the stator cooling structure described in any one of the above embodiments;

[0022] An oil inlet chamber shell is provided at one end of the stator along the axial direction and is sealed to the stator. An oil inlet hole is provided on the outer periphery of the oil inlet chamber shell, and the oil inlet hole is connected to the first cooling channel and the second cooling channel.

[0023] An oil outlet chamber shell is located at the other end of the stator along the axial direction and is sealed to the stator. An oil outlet hole is provided on the outer periphery of the oil outlet chamber shell, and the oil outlet hole is connected to the first cooling channel and the second cooling channel.

[0024] Using the above technical solution, the oil inlet is connected to the first cooling channel and the second cooling channel, and the oil outlet is also connected to the first cooling channel and the second cooling channel. The coolant enters the first cooling channel and the second cooling channel through the oil inlet, cools the stator winding, and then flows out through the oil outlet. The first cooling channel and the second cooling channel are separated from the stator winding by only a thin first wall and a second wall, which allows the coolant to fully remove the heat from multiple stator windings, thereby improving cooling efficiency and cooling effect.

[0025] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, wherein the oil inlet chamber shell is provided with a plurality of oil drain holes on the side facing away from the stator, and the plurality of oil drain holes are arranged at intervals along the circumference.

[0026] By adopting the above technical solution and setting multiple oil drain holes, the oil pressure is guaranteed while preventing the formation of dead zones in the oil, which would lead to excessive local temperature rise.

[0027] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, wherein the oil inlet chamber shell is provided with a first annular groove on the side facing the stator, the first annular groove being connected to the oil inlet hole and the first cooling channel and the second cooling channel; the oil outlet chamber shell is provided with a second annular groove on the side facing the stator, the second annular groove being connected to the oil outlet hole and the first cooling channel and the second cooling channel.

[0028] Using the above technical solution, the first annular groove is connected to the oil inlet, the first cooling channel, and the second cooling channel, and the second annular groove is connected to the oil outlet, the first cooling channel, and the second cooling channel. In this way, the coolant enters the first annular groove through the oil inlet of the oil inlet chamber shell, and then enters the first cooling channel and the second cooling channel through the first annular groove to cool the stator winding that is separated from the first cooling channel and the second cooling channel only by a thin first wall and a second wall. Then it flows into the second annular groove and finally flows out from the oil outlet of the oil outlet chamber shell.

[0029] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, wherein an oil overflow hole is provided on the outer periphery of the oil outlet chamber shell, and the oil overflow hole and the oil outlet hole are spaced apart along the circumferential direction.

[0030] By adopting the above technical solution, an overflow hole is provided to ensure that excess oil flows out smoothly from the oil outlet chamber shell. Attached Figure Description

[0031] Figure 1A A schematic diagram of the stator cooling structure is shown in one of the embodiments.

[0032] Figure 1B Schematic diagrams of stator cooling structures are shown in some embodiments. Figure 2 ;

[0033] Figure 2 An exploded view of the motor provided in an embodiment of this application is shown;

[0034] Figure 3 A perspective view of the motor provided in an embodiment of this application is shown;

[0035] Figure 4 A cross-sectional view of the motor provided in an embodiment of this application is shown, illustrating the flow direction of the coolant;

[0036] Figure 5 A plan view of the stator provided in an embodiment of this application is shown;

[0037] Figure 6 A side view of the stator cooling structure provided in an embodiment of this application is shown;

[0038] Figure 7A perspective view of the stator cooling structure provided in an embodiment of this application is shown.

[0039] Figure 8 A three-dimensional representation of the stator cooling structure provided in an embodiment of this application is shown. Figure 2 The stator winding is not shown.

[0040] In the attached drawings, the reference numerals are as follows: 10, miniature cooling tank; 100, stator; 200, oil inlet housing; 201, oil inlet hole; 202, oil drain hole; 203, first annular groove; 300, oil outlet housing; 301, oil outlet hole; 302, second annular groove; 303, overflow hole; 400, stator cooling structure; 401, first cooling channel; 402, second cooling channel; 403, stator core; 404, wire groove; 4 05. Stator winding; 406. First injection molded body; 407. Second injection molded body; 408. Third injection molded body; 409. First wall; 410. Second wall; 411. First arc segment; 412. Second arc segment; 413. Reinforcing plate; 414. Abutment part; 415. First part; 416. Second part; 417. Wire groove; 500. Reducer oil sump; 600. Oil pump; 700. Motor oil return channel. Detailed Implementation

[0041] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0042] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0044] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0047] refer to Figure 1A and Figure 1B Current stator oil cooling solutions mainly involve cooling the stator core through oil channels. This solution requires adding miniature cooling grooves 10 to the stator laminations. These miniature cooling grooves 10 and the slots 404 are radially aligned (see...). Figure 1A ) or circumferential (see Figure 1B The cooling oil passes through the micro-cooling tank 10 and carries away the heat through the flow of the cooling oil. The stator winding is located in the slot 404. Therefore, the micro-cooling tank 10 is separated from the stator winding by a thick slot wall. In other words, the heat of the stator winding still needs to be transferred through a section of the stator core, resulting in low cooling efficiency. Furthermore, the slot of the micro-cooling tank 10 is close to the yoke, which affects the distribution of the magnetic field.

[0048] Therefore, this application discloses an electric motor, including a stator cooling structure 400. The first cooling channel 401 of the stator cooling structure 400 is separated from the stator winding 405 by only a thin first wall 409, and the second cooling channel 402 is separated from the stator winding 405 by only a thin second wall 410, which greatly improves the cooling efficiency.

[0049] This application discloses an electric motor, with reference to... Figures 2 to 4The motor includes: a stator 100, an oil inlet housing 200, and an oil outlet housing 300. The stator 100 includes a stator cooling structure 400, which will be described later (see [link]). Figure 6 ); along the axial direction (i.e. Figure 2 (As shown in the Y direction), the oil inlet housing 200 is located at one end of the stator 100 and is sealed to the stator 100. An oil inlet hole 201 is provided on the outer periphery of the oil inlet housing 200, and the oil inlet hole 201 communicates with the first cooling channel 401 and the second cooling channel 402; along the axial direction (i.e., Figure 2 (As shown in the Y direction), the oil outlet chamber shell 300 is located at the other end of the stator 100 and is sealed to the stator 100. The outer periphery of the oil outlet chamber shell 300 is provided with an oil outlet hole 301, which is connected to the first cooling channel 401 and the second cooling channel 402.

[0050] For example, the oil inlet 201 is connected to the first cooling channel 401 and the second cooling channel 402, and the oil outlet 301 is connected to the first cooling channel 401 and the second cooling channel 402. The coolant enters the first cooling channel 401 and the second cooling channel 402 through the oil inlet 201, cools the stator winding 405, and then flows out through the oil outlet 301. The first cooling channel 401 and the second cooling channel 402 are separated from the stator winding 405 by only a thin first wall 409 and a second wall 410, so that the coolant can fully remove the heat of the multiple stator windings 405, thereby improving the cooling efficiency and cooling effect.

[0051] For example, the oil inlet housing 200 has ten oil drain holes 202 on the side facing away from the stator 100, and the ten oil drain holes 202 are arranged circumferentially (i.e. Figure 2 The oil drain holes 202 are spaced apart as shown in direction A. However, this application embodiment does not limit the number of oil drain holes 202, and can also have three, five, twelve, etc. By setting ten oil drain holes 202, the oil pressure is guaranteed while preventing the formation of dead zones in the oil, which would lead to excessive local temperature rise.

[0052] For example, the oil inlet chamber shell 200 has a first annular groove 203 on the side facing the stator 100, and the first annular groove 203 is connected to the oil inlet hole 201, the first cooling channel 401, and the second cooling channel 402; the oil outlet chamber shell 300 has a second annular groove 302 on the side facing the stator 100, and the second annular groove 302 is connected to the oil outlet hole 301, the first cooling channel 401, and the second cooling channel 402.

[0053] In summary, for reference Figures 2 to 4The main feature of the motor disclosed in this application is that the insulating paper and varnish are eliminated, and the flat copper wire is fixed by injection molding material (i.e., the first injection molding body 406, the second injection molding body 407 and the third injection molding body 408 described later) between the wire slot 404 and the stator winding 405; at the same time, a cooling oil channel (i.e., the first cooling channel 401 and the second cooling channel 402) is formed between part of the injection molding material (i.e. the second injection molding body 407 described later) and the stator winding 405, so that the cooling oil directly contacts the stator winding 405 and carries away the heat.

[0054] Along the axial direction, the stator 100 has oil inlet holes 201 and oil outlet holes 301 on both sides, which, together with the first cooling channel 401 and the second cooling channel 402 in the slot 404, form the inlet and return channels for coolant (e.g., cooling oil). Oil inlet shells 200 and oil outlet shells 300 are designed on both sides of the stator 100. The oil inlet shells 200 and 300 form a complete cavity with the stator 100 through a sealing element. Oil enters the first annular groove 203 from the oil inlet hole 201. Under the pressure of the oil pump 600, it flows into the first cooling channel 401 and the second cooling channel 402 in the stator core 403, and collects in the second annular groove 302. The oil outlet shell 300 has an oil outlet hole 301, through which the oil flows out into the motor cavity and returns to the motor oil return channel 700 (the specific flow direction can be referenced). Figure 4 (Middle yellow arrow).

[0055] For example, refer to Figures 4 to 6 The stator core 403 is provided with forty-eight wire slots 404, which are arranged circumferentially (i.e., Figure 5 The stator windings 405 are spaced apart in the direction A shown, and each slot 404 contains six stator windings 405. The six stator windings 405 are arranged radially (i.e., Figure 5 The X-direction shown is spaced apart, and along the axial direction (i.e. Figure 4 The Y-direction shown extends to the first annular groove 203 and the second annular groove 302. However, the embodiments of this application do not limit the specific number of wire grooves 404 and stator windings 405. There can be thirty wire grooves 404, thirty-four wire grooves 404, forty wire grooves 404, etc., or there can be three stator windings 405, four stator windings 405, five stator windings 405, etc.

[0056] For example, the first annular groove 203 is connected to the oil inlet 201, the first cooling channel 401 and the second cooling channel 402, and the second annular groove 302 is connected to the oil outlet 301, the first cooling channel 401 and the second cooling channel 402. In this way, the coolant enters the first annular groove 203 from the oil inlet 201 of the oil inlet chamber shell 200, and then enters the first cooling channel 401 and the second cooling channel 402 from the first annular groove 203 to cool the stator winding 405 which is separated from the first cooling channel 401 and the second cooling channel 402 only by a thin first wall 409 and a second wall 410. Then it flows into the second annular groove 302 and finally flows out from the oil outlet 301 of the oil outlet chamber shell 300.

[0057] For example, refer to Figure 2 and Figure 3 An overflow hole 303 is also provided on the outer periphery of the oil outlet chamber shell 300. The overflow hole 303 is located at the highest position of the oil outlet chamber shell 300, and the overflow hole 303 and the oil outlet hole 301 are circumferentially (i.e., Figure 3 (As shown in direction A) The oil overflow hole 303 is set at intervals to ensure that excess oil flows out smoothly from the oil outlet shell 300.

[0058] For example, refer to Figures 6 to 8 The aforementioned stator cooling structure 400 includes: a stator core 403, a first injection-molded body 406, a second injection-molded body 407, and a third injection-molded body 408. The first injection-molded body 406 is disposed between two stator windings 405 spaced apart. The second injection-molded body 407 includes a first wall 409 and a second wall 410 disposed opposite to each other. The first wall 409 is attached to the six stator windings 405 and is circumferentially aligned with the wire groove 404 (i.e., ...). Figure 8 The first cooling channel 401 is formed by spacing the two walls (as shown in direction A) at intervals; the second wall 410 is attached to the six stator windings 405 and is circumferentially aligned with the wire groove 404 (i.e., along direction A). Figure 8 The channels are spaced apart in the direction A shown to form a second cooling channel 402; along the radial direction (i.e. Figure 7 (in the X direction shown), a third injection molded body 408 is provided at both ends of the first cooling channel 401 and the second cooling channel 402 to seal the first cooling channel 401 and the second cooling channel 402.

[0059] It should be noted that the stator cooling structure 400 provided in this application embodiment is not only applicable to motors, but also to oil-cooled transformers, industrial motors, wind turbines, hydroelectric generators, etc.

[0060] Using the above technical solution, the first injection-molded body 406 is disposed between two stator windings 405 spaced apart to isolate the two stator windings 405. The first wall 409 of the second injection-molded body 407 is attached to the six stator windings 405, and the second wall 410 is attached to the six stator windings 405. Together with the first injection-molded body 406, they position and insulate the six stator windings 405. The first wall 409 and the wire groove 404 are arranged circumferentially to form a first cooling channel 401, and the second wall 410 and the wire groove 404 are arranged circumferentially to form a second cooling channel 402. The coolant passes through the first cooling channel 401 and the second cooling channel 402 to cool the six stator windings 405. The first cooling channel 401 and the second cooling channel 402 are separated from the six stator windings 405 only by the thin first wall 409 and the second wall 410, so that the coolant can fully remove the heat from the six stator windings 405, thereby improving the cooling efficiency and cooling effect.

[0061] For example, the stator winding 405 within the slot 404 is fixed by injection molding. Part of the injection molding material (i.e., the aforementioned second injection molded body 407) forms oil channels (i.e., the first cooling channel 401 and the second cooling channel 402) with the stator winding 405, eliminating the need for insulating paper and varnish, ensuring unobstructed flow of the oil channels. Injection molding between the stator windings 405 within the slot 404 improves insulation performance. The stator windings 405 within the slot 404 are in direct contact with the flowing cooling oil, allowing heat to be directly carried away by the cooling oil, significantly improving cooling efficiency. Compared to existing technologies, injection molding within the slot 404 better fixes the stator windings 405, while eliminating the need for varnish and insulating paper, saving process time and reducing costs.

[0062] A thin layer of material is injection-molded into the inner wall of the slot 404 to achieve insulation, thus improving the overall insulation performance of the stator. An opening is created between the injection-molded material and the stator winding 405, allowing the embodiment of this application to be realized using a mold. The stator winding 405 of the slot 404 is immersed in cooling oil, allowing both the ends of the stator winding 405 and the stator winding 405 within the slot 404 to be directly cooled by the cooling oil, improving cooling efficiency. The stator winding 405 is fixed within the slot 404 by the injection-molded material, increasing the channels for the cooling oil within the slot.

[0063] For example, along the radial direction (i.e. Figure 8 As shown in the X direction, both the upper and lower ends of the first injection-molded body 406 are provided with a first arc segment 411 for fixing the stator winding 405. The first arc segment 411 extends in the direction toward the stator winding 405. The two adjacent first injection-molded bodies 406 are radially (i.e., Figure 8 The first arc segments 411 of the two adjacent first injection molded bodies 406 (as shown in the X direction) are spaced apart and extend in the direction toward the stator winding 405 to fix the stator winding 405 located between them, thereby enhancing the fixing and limiting effect.

[0064] For example, along the radial direction (i.e. Figure 8 As shown in the X direction), a third injection body 408 is provided at each end of the two first injection bodies 406 at the two outermost ends, along the circumferential direction (i.e., Figure 8 As shown in direction A), both ends of the third injection-molded body 408 extend toward the stator winding 405 to form a second arc segment 412. The third injection-molded body 408 and its adjacent first injection-molded body 406 are radially (i.e., Figure 8 The first arc segment 411 of the adjacent first injection molded body 406 extends in the direction toward the stator winding 405, and the second arc segment 412 of the third injection molded body 408 extends in the direction toward the stator winding 405, so as to fix the stator winding 405 located between the two and enhance the fixing and limiting effect.

[0065] For example, along the circumferential direction (i.e. Figure 8 As shown in direction A), the first injection-molded body 406 has reinforcing plates 413 at both ends, and the reinforcing plates 413 are radially (i.e., Figure 8 Extending in the X direction (as shown), and connected to the first arc segment 411 and the second injection body 407 respectively, thereby increasing the stability of the connection between the first injection body 406 and the second injection body 407.

[0066] For example, along the circumferential direction (i.e. Figure 8 As shown in direction A), the two ends of the third injection-molded body 408 include abutment portions 414, the abutment portions 414 being radial (i.e., Figure 8 Extending in the X direction as shown, and located at both ends of the first cooling channel 401 and the second cooling channel 402 to seal the first cooling channel 401 and the second cooling channel 402, ensuring that the coolant flows in the first cooling channel 401 and the second cooling channel 402 without leakage.

[0067] Exemplarily, the third injection body 408 further includes a first portion 415 extending circumferentially and radially spaced from the first injection body 406, near the groove opening 417. Figure 5 The third injection-molded body 408 (as can be seen) also includes a second part 416, which extends radially to the groove 417 to fill the entire groove 417.

[0068] For example, the first injection body 406 includes five, the five first injection bodies 406 being radially (i.e. Figure 8 The X-direction shown is spaced out, but the number of first injection molded bodies 406 is not limited in this embodiment. The number is selected according to the number of stator windings 405.

[0069] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A stator cooling structure, characterized in that, include: The stator core has multiple slots, which are spaced apart circumferentially. Each slot contains multiple stator windings, which are spaced apart radially. A first injection molded body is disposed between two stator windings that are spaced apart; The second injection molded body includes a first wall and a second wall disposed opposite to each other. The first wall is attached to the plurality of stator windings and is spaced apart from the wire groove along the circumferential direction to form a first cooling channel. The second wall is attached to the plurality of stator windings and is spaced apart from the wire groove along the circumferential direction to form a second cooling channel. The third injection body is provided at both ends of the first cooling channel and the second cooling channel along the radial direction to seal the first cooling channel and the second cooling channel.

2. The stator cooling structure as described in claim 1, characterized in that, Along the radial direction, the upper and lower ends of the first injection molded body are provided with a first arc segment for fixing the stator winding, and the first arc segment extends in the direction toward the stator winding.

3. The stator cooling structure as described in claim 1, characterized in that, Along the circumferential direction, both ends of the third injection-molded body extend toward the stator winding to form a second arc segment.

4. The stator cooling structure as described in claim 2, characterized in that, Along the circumferential direction, the first injection body has reinforcing plates at both ends, the reinforcing plates extend along the radial direction and are respectively connected to the first arc segment and the second injection body.

5. The stator cooling structure as described in claim 1, characterized in that, The third injection molded body includes a stop portion that extends radially and is located at both ends of the first cooling channel and the second cooling channel.

6. The stator cooling structure as described in claim 1, characterized in that, The first injection body includes a plurality of first injection bodies, which are arranged at intervals along the radial direction.

7. An electric motor, characterized in that, include: Stator, the stator comprising the stator cooling structure as described in any one of claims 1-6; An oil inlet chamber shell is provided at one end of the stator along the axial direction and is sealed to the stator. An oil inlet hole is provided on the outer periphery of the oil inlet chamber shell, and the oil inlet hole is connected to the first cooling channel and the second cooling channel. An oil outlet chamber shell is located at the other end of the stator along the axial direction and is sealed to the stator. An oil outlet hole is provided on the outer periphery of the oil outlet chamber shell, and the oil outlet hole is connected to the first cooling channel and the second cooling channel.

8. The motor as described in claim 7, characterized in that, The oil inlet chamber shell has multiple oil drain holes on the side facing away from the stator, and the multiple oil drain holes are spaced apart along the circumference.

9. The motor as described in claim 7, characterized in that, The oil inlet chamber shell has a first annular groove on the side facing the stator, and the first annular groove is connected to the oil inlet hole, the first cooling channel, and the second cooling channel; the oil outlet chamber shell has a second annular groove on the side facing the stator, and the second annular groove is connected to the oil outlet hole, the first cooling channel, and the second cooling channel.

10. The motor as described in claim 7, characterized in that, The outer periphery of the oil outlet chamber is also provided with an oil overflow hole, and the oil overflow hole and the oil outlet hole are spaced apart along the circumferential direction.

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