Stator slot cooling structure and motor

Abstract

The present application relates to a stator slot cooling structure and a motor, which includes: a cooling plate, the end face of the cooling plate is provided with a through hole, the through hole is used to be coaxially arranged with the stator core, the cooling plate is provided with a liquid inlet, the cooling plate is used to fit on one end face of the stator core; a pipe one, the pipe one is connected to the interior of the cooling plate, the pipe one is used to fit on the end face of the tooth portion; a pipe two, the pipe two is connected to the pipe one, the pipe two is used to be located in the slot, and the end of the pipe two away from the pipe one is provided with a liquid outlet one. The integrated design of the cooling plate, pipe one and pipe two makes the entire cooling structure compact and easy to install, does not take up too much motor space, is conducive to the lightweight and integrated design of the motor, and significantly improves the cooling efficiency, reduces the temperature of the stator core, teeth and windings, thereby extending the service life of the motor and improving its performance.

Description

Technical Field

[0001] The present application relates to the field of motor heat dissipation, and in particular to a stator slot cooling structure and a motor. Background Art

[0002] The heat dissipation capacity of a motor system directly impacts its lifespan, performance output, and efficiency. According to the principle of electromagnetic induction, when a motor is running, the stator, energized by current, generates an induced rotating magnetic field, causing the rotor to rotate. During motor operation, the stator is the primary source of heat, particularly the windings and core within the stator's slots. The heat dissipation capacity of the motor system directly impacts its ability to operate efficiently and effectively. Good heat dissipation can extend the motor's lifespan, improve its sustained performance, and significantly contribute to improving its efficiency.

[0003] In the related art, the traditional motor heat dissipation method is to cool the motor housing and the outer wall of the stator core to indirectly dissipate heat to the motor slots and windings. Such heat dissipation effect is average. Summary of the Invention

[0004] The present application provides a stator slot cooling structure and a motor, which can solve the problem that the traditional motor heat dissipation method indirectly dissipates heat to the motor slots and windings by cooling the motor housing and the outer wall of the stator core, but the heat dissipation effect is generally poor.

[0005] In a first aspect, an embodiment of the present application provides a stator slot cooling structure, comprising:

[0006] A cooling plate, wherein an end surface of the cooling plate is provided with a through hole, the through hole is used to be coaxially arranged with the stator core, the cooling plate is provided with a liquid inlet, and the cooling plate is used to be attached to an end surface of the stator core;

[0007] Pipeline 1, the pipe being in communication with the interior of the cooling plate and being adapted to be attached to an end surface of the tooth portion;

[0008] Pipeline 2 is connected to pipeline 1, pipeline 2 is used to be located in the tooth groove, and a liquid outlet 1 is provided at one end of pipeline 2 away from pipeline 1.

[0009] In combination with the first aspect, in one embodiment, the pipeline 1 and the pipeline 2 form a group of cooling pipeline 1, and the number of the cooling pipeline 1 is consistent with the number of the teeth.

[0010] In combination with the first aspect, in one embodiment, the stator slot cooling structure further includes:

[0011] Pipeline three, said pipeline three is connected to said pipeline one, said pipeline three and said pipeline two are used to be located in the same tooth slot, said pipeline three and said pipeline two are used to be spaced apart along the radial direction of the stator core, and said pipeline three is provided with a liquid outlet two at one end away from said pipeline one.

[0012] In combination with the first aspect, in one embodiment, the pipeline 1, the pipeline 2, and the pipeline 3 form a group of cooling pipelines 2, and the number of the cooling pipelines 2 is consistent with the number of the teeth.

[0013] In combination with the first aspect, in one embodiment, the cooling plate is connected to a liquid inlet nozzle, the liquid inlet of the liquid inlet nozzle forms the liquid inlet, and the liquid inlet of the liquid inlet nozzle is used to communicate with the outside of the motor housing. Along the radial direction of the stator core, at least a portion of the liquid inlet nozzle is used to be embedded in the outer side wall of the stator core, and another portion thereof is used to be embedded in the inner side wall of the motor housing.

[0014] In a second aspect, an embodiment of the present application provides a motor, comprising:

[0015] Motor housing;

[0016] A stator core is installed in the motor housing, wherein a plurality of teeth are provided on the inner side wall of the stator core at intervals in an annular direction, and a tooth slot is formed between two adjacent teeth;

[0017] A cooling plate, wherein an end surface of the cooling plate is provided with a through hole, the through hole is coaxially arranged with the stator core, the cooling plate is provided with a liquid inlet, and the cooling plate is attached to an end surface of the stator core;

[0018] Pipeline 1, the pipeline 1 is connected to the interior of the cooling plate, and the pipeline 1 is attached to the end surface of the tooth portion;

[0019] Pipeline 2, said pipeline 2 is connected with said pipeline 1, said pipeline 2 is located in said tooth groove, said pipeline 2 is provided with a liquid outlet 1 at one end away from said pipeline 1, and along the axial direction of the motor, a liquid discharge port is provided in a cavity at one end of said motor housing close to said liquid outlet 1.

[0020] In combination with the second aspect, in one embodiment, the outer side wall of the stator core is provided with a first mounting groove, and the inner side wall of the motor housing is provided with a second mounting groove;

[0021] The cooling plate is connected to a liquid inlet nozzle, the liquid inlet of the liquid inlet nozzle forms the liquid inlet, and along the radial direction of the motor, the liquid inlet nozzle is at least partially embedded in the first mounting groove, and the remaining portion is installed in the second mounting groove;

[0022] The motor housing is provided with a liquid inlet through hole, and the liquid inlet through hole is communicated with the liquid inlet of the liquid inlet nozzle.

[0023] In combination with the second aspect, in one embodiment, along the axial direction of the motor, one end of the second mounting groove passes through to the outside of the motor housing, and the other end thereof is located inside the motor housing.

[0024] In conjunction with the second aspect, in one embodiment, the stator slot cooling structure further includes:

[0025] Pipeline three, said pipeline three being connected to said pipeline one, said pipeline three and said pipeline two being located in the same tooth slot, said pipeline three and said pipeline two being spaced apart in the radial direction of the stator core, and said pipeline three having a liquid outlet two at an end away from said pipeline one;

[0026] The cooling plate, the first pipeline, the second pipeline, and the third pipeline form a set of cooling components. There are two cooling components. The cooling plate of the first cooling component is attached to one end surface of the stator core, and the cooling plate of the second cooling component is attached to the other end surface of the stator core.

[0027] The second pipeline and the third pipeline of the two cooling assemblies are arranged in one tooth groove;

[0028] There are two drainage ports, the first of which is communicated with a cavity at one end of the motor housing, and the second of which is communicated with a cavity at the other end of the motor housing.

[0029] In combination with the second aspect, in one embodiment, a cooling liquid supply system, wherein the output end of the cooling liquid supply system is connected to the liquid inlet, and the input end of the cooling liquid supply system is connected to the liquid outlet.

[0030] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0031] The coolant is introduced through the liquid inlet on the cooling plate. The coolant can flow through the cooling plate and directly contact the end face of the stator core, thereby effectively cooling the end face of the stator core; pipeline one is connected to the inside of the cooling plate and fits the end face of the tooth, so that the coolant can directly cool the tooth, thereby reducing the temperature of the tooth; pipeline two is located in the tooth slot and flows out through liquid outlet one. When the coolant flows in the tooth slot, it can take away the heat generated by the winding, thereby directly cooling the winding. The integrated design of the cooling plate, pipeline one and pipeline two makes the entire cooling structure compact and easy to install, does not take up too much motor space, is conducive to the lightweight and integrated design of the motor, and significantly improves the cooling efficiency, reduces the temperature of the stator core, teeth and winding, thereby extending the service life of the motor and improving its performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a stator slot cooling structure;

[0034] Figure 2 for Figure 1 Schematic diagram of the rear view structure;

[0035] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure;

[0036] Figure 4 It is a schematic diagram of the three-dimensional structure of another embodiment of the stator slot cooling structure;

[0037] Figure 5 Schematic diagram of the three-dimensional structure of the stator core;

[0038] Figure 6 for Figure 4 The stator slot cooling structure is installed in Figure 5 Schematic diagram of the three-dimensional structure of the stator core;

[0039] Figure 7 Schematic diagram of the three-dimensional structure of the motor housing;

[0040] Figure 8 for Figure 7 Schematic diagram of the local structure in

[0041] Figure 9 for Figure 6 The stator slot cooling structure and stator core are installed in Figure 7 Schematic diagram of the three-dimensional structure of the motor housing;

[0042] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure;

[0043] Figure 11 for Figure 6 Schematic diagram of the partial enlarged structure of the stator core end face.

[0044] In the figure: 1. stator core; 11. tooth; 12. tooth slot; 13. mounting slot 1; 14. tooth tip; 2. winding; 3. motor housing; 31. mounting slot 2; 32. mounting slot 3; 321. liquid inlet hole; 33. liquid discharge port; 34. liquid collecting port; 35. stop step; 36. square slot; 4. cooling plate; 41. through hole; 42. liquid inlet; 43. pipeline 1; 44. pipeline 2; 441. liquid outlet 1; 45. pipeline 3; 451. liquid outlet 2; 46. liquid inlet nozzle. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] The embodiments of the present application provide a stator slot cooling structure and a motor, which can solve the problem that the traditional motor heat dissipation method indirectly dissipates heat to the motor slots and windings by cooling the motor housing and the outer wall of the stator core, but the heat dissipation effect is generally poor.

[0047] First, as Figure 1 、 Figure 2 and Figure 3 As shown, an embodiment of the present application provides a stator tooth slot cooling structure, which includes: a cooling plate 4, a through hole 41 is provided on the end face of the cooling plate 4, the through hole 41 is used to be coaxially arranged with the stator core 1, the cooling plate 4 is provided with a liquid inlet 42, and the cooling plate 4 is used to be attached to one end face of the stator core 1; a pipeline 1 43, the pipeline 1 43 is connected to the interior of the cooling plate 4, the pipeline 1 43 is used to be attached to the end face of the tooth portion 11; a pipeline 2 44, the pipeline 2 44 is connected to the pipeline 1 43, the pipeline 2 44 is used to be located in the tooth slot 12, and a liquid outlet 1 441 is provided at the end of the pipeline 2 44 away from the pipeline 1 43.

[0048] In this embodiment, the cooling plate 4 is coaxially arranged with the stator core 1 through the through hole 41 on its end face, and is tightly fitted to one end face of the stator core 1, ensuring that the coolant can directly contact the end face of the stator core, thereby achieving effective cooling of the stator core end face. Pipeline 1 43 is connected to the interior of the cooling plate 4 and is fitted to the end face of the tooth portion 11, so that the coolant can flow through pipeline 1 43 and directly cool the tooth portion 11, reducing the temperature of the tooth portion 11, helping to reduce heat loss and improve the efficiency of the motor. Pipeline 2 44 is connected to pipeline 1 43 and is located in the tooth slot 12. This design allows the coolant to penetrate deep into the tooth slot 12 and directly cool the winding 2. The coolant flowing out through the liquid outlet 1 441 takes away the heat generated by the winding 2, significantly improving the cooling effect. Due to the arrangement of the cooling plate 4, pipe 1 43, and pipe 2 44, the coolant can flow evenly through the end face of the stator core 1, the end face of the tooth portion 11, and the tooth slot 12, achieving uniform cooling of the internal components of the motor. This helps to avoid the occurrence of local overheating and improves the stability and reliability of the motor. The integrated design of the cooling plate 4, pipe 1 43, and pipe 2 44 makes the entire cooling structure compact and easy to install. Pipe 2 44 is inserted into the corresponding tooth slot 12 until the cooling plate 4 and pipe 1 43 are in contact with the end face of the stator core 1 and the end face of the tooth portion 11. This does not take up too much motor space, which is conducive to the lightweight and integrated design of the motor. This design not only saves space, but also makes the cooling structure easy to install and disassemble, which is beneficial to the maintenance and care of the motor. Effective cooling can significantly reduce the temperature rise of the motor, reduce heat loss and noise, thereby improving the efficiency and output power of the motor. The reduced temperature also helps to reduce vibration and wear of the motor, extending the service life of the motor.

[0049] In combination with the first aspect, in one embodiment, the pipeline 1 43 and the pipeline 2 44 form a group of cooling pipeline 1, and the number of cooling pipeline 1 is consistent with the number of teeth 11.

[0050] In this embodiment, each tooth 11 and tooth slot 12 of the motor is assigned a corresponding set of cooling pipes 1, meaning that each tooth 11 and tooth slot 12 receives a direct supply of coolant. This design ensures that coolant flows precisely through each tooth 11 and tooth slot 12, achieving precise cooling of each tooth 11 and tooth slot 12 and effectively reducing the temperature of each tooth 11 and tooth slot 12. This design is highly adaptable and can be applied to motors with different numbers of teeth 11. Regardless of the number of teeth 11 in a motor, the cooling structure can be adapted by increasing or decreasing the number of cooling pipes 1.

[0051] In combination with the first aspect, in one embodiment, Figure 1 、 Figure 2 and Figure 3As shown, the stator slot cooling structure also includes: pipeline three 45, pipeline three 45 is connected to pipeline one 43, pipeline three 45 and pipeline two 44 are used to be located in the same slot 12, pipeline three 45 and pipeline two 44 are used to be spaced apart along the radial direction of the stator core 1, and a liquid outlet two 451 is provided at one end of pipeline three 45 away from pipeline one 43.

[0052] In this embodiment, the addition of the third pipe 45 provides more cooling liquid flow paths in the same tooth groove 12, such as Figure 6 As shown, pipeline 2 44 and pipeline 3 45 are spaced apart along the radial direction of the stator core 1, which can more effectively cover the bottom and top areas within the tooth slot 12, ensuring that the coolant can fully contact the winding 2, thereby significantly enhancing the cooling effect and avoiding local overheating or insufficient cooling. This design ensures that the temperature within the tooth slot 12 area can be effectively controlled, improving the uniformity of cooling. The connection between pipeline 3 45 and pipeline 1 43, as well as its spaced distribution with pipeline 2 44 within the tooth slot 12, provide a smoother flow path for the coolant. The coolant can flow from pipeline 1 43 into pipeline 2 44 and pipeline 3 45, and then flow out through outlet 1 441 and outlet 2 451 respectively. The effective cooling can more effectively reduce the temperature rise of the motor, reduce heat loss, and thus improve the efficiency and output power of the motor. At the same time, the reduced temperature also helps to reduce the noise and vibration of the motor, improving the operating stability and reliability of the motor.

[0053] In combination with the first aspect, in one embodiment, pipeline one 43 , pipeline two 44 and pipeline three 45 form a group of cooling pipeline two, and the number of cooling pipelines two is consistent with the number of teeth 11 .

[0054] In this embodiment, since each tooth 11 corresponds to a set of cooling pipes 2, this ensures that each tooth 11 and tooth groove 12 can receive comprehensive and precise cooling. The coordinated operation of pipes 1 43, 2 44, and 3 45 allows the coolant to be distributed to each tooth 11 and tooth groove 12, covering the end faces of the tooth 11 and key areas within the tooth groove 12, achieving efficient heat exchange, promoting uniform flow of coolant, and avoiding the occurrence of cooling blind spots or overheating areas. This design not only improves cooling efficiency, but also ensures uniform temperature distribution within the motor, helping to extend the motor's service life.

[0055] In combination with the first aspect, in one embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 6As shown, the cooling plate 4 is connected to a liquid inlet nozzle 46, and the liquid inlet of the liquid inlet nozzle 46 forms a liquid inlet 42. The liquid inlet of the liquid inlet nozzle 46 is used to communicate with the outside of the motor housing 3. Along the radial direction of the stator core 1, at least a portion of the liquid inlet nozzle 46 is used to be embedded in the outer wall of the stator core 1, and another portion thereof is used to be embedded in the inner wall of the motor housing 3.

[0056] In this embodiment, Figure 6 、 Figure 7 、 Figure 8 and Figure 10 As shown, the liquid inlet nozzle 46 is partially embedded in the outer wall of the stator core 1 and the other part is embedded in the inner wall of the motor housing 3. This embedded design helps to enhance the sealing of the cooling system. It reduces the risk of coolant leakage and ensures the stable operation of the cooling system. The embedded design of the liquid inlet nozzle 46 allows it to fully utilize the limited space inside the motor. By cleverly embedding the liquid inlet nozzle 46 into the walls of the stator core 1 and the motor housing 3, the introduction of coolant is achieved without occupying additional space, which helps to miniaturize and lightweight the motor. The liquid inlet nozzle 46 fits tightly with the stator core 1 and the motor housing 3. The embedded design of the liquid inlet nozzle 46 makes it easier to install. During the motor assembly process, the liquid inlet nozzle 46 can be directly embedded in the predetermined position without the need for additional fixings or complicated installation steps. This design also facilitates subsequent maintenance and replacement. The embedded design of the liquid inlet nozzle 46 makes the appearance of the motor more neat and beautiful. It avoids the exposure of external pipes and joints, improving the overall visual effect of the motor.

[0057] Second, as Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 As shown, an embodiment of the present application provides a motor, which includes: a motor housing 3; a stator core 1, the stator core 1 is installed in the motor housing 3, and a plurality of teeth 11 are circumferentially spaced apart on the inner wall of the stator core 1, and a tooth slot 12 is formed between two adjacent teeth 11; a cooling plate 4, a through hole 41 is provided on the end face of the cooling plate 4, the through hole 41 is coaxially arranged with the stator core 1, the cooling plate 4 is provided with a liquid inlet 42, and the cooling plate 4 is attached to one end face of the stator core 1; a pipeline 1 43, the pipeline 1 43 is connected to the interior of the cooling plate 4, the pipeline 1 43 is attached to the end face of the tooth 11; a pipeline 2 44, the pipeline 2 44 is connected to the pipeline 1 43, the pipeline 2 44 is located in the tooth slot 12, a liquid outlet 1 441 is provided at the end of the pipeline 2 44 away from the pipeline 1 43, and a liquid discharge port 33 is provided in the chamber at one end of the motor housing 3 close to the liquid outlet 1 441 along the axial direction of the motor.

[0058] In this embodiment, a cooling structure consisting of a cooling plate 4, a pipe 1 43, a pipe 2 44, etc. is integrated inside the motor. The cooling plate 4 is coaxially arranged with the stator core 1 through its through hole 41 and is attached to one end face of the stator core 1, ensuring that the coolant can directly act on the heating part of the end face of the stator core 1. The connection design of pipe 1 43 and pipe 2 44 allows the coolant to flow in the end face of the tooth 11 and the tooth groove 12, achieving comprehensive cooling of the key components of the motor and effectively reducing the temperature rise of the motor. The cooling plate 4 is provided with a liquid inlet 42 for introducing coolant. Pipe 1 43 is connected to the inside of the cooling plate 4 and is attached to the end face of the tooth 11 to guide the coolant to the tooth 11. Pipe 2 44 is located in the tooth groove 12 and is connected to pipe 1 43, forming a flow path for the coolant, fully contacting the heating components of the motor, and improving the cooling efficiency. Figure 10 As shown, along the axial direction of the motor, if the cooling structure is installed on the left end face of the stator core 1, a drain port 33 is provided in the right end chamber of the motor housing 3 near the liquid outlet 1 441. This design allows the coolant to enter the right end chamber after flowing through the pipe 2 44, and can be smoothly discharged out of the motor through the drain port 33, ensuring the continuous and stable operation of the cooling system. The efficient cooling structure can significantly reduce the temperature rise of the motor and reduce heat loss, thereby improving the efficiency and output power of the motor. At the same time, the reduced temperature also helps to reduce the noise and vibration of the motor, and improves the operating stability and reliability of the motor. During the motor assembly process, the pipe 2 44 can be directly inserted into the corresponding tooth slot 12 until the cooling plate 4 fits with the end face of the stator core 1 to complete the installation. There is no need for complicated installation steps or additional fixings, which reduces the manufacturing cost and installation difficulty.

[0059] In conjunction with the second aspect, in one embodiment, Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 10 As shown, the outer wall of the stator core 1 is provided with a mounting groove 13, and the inner wall of the motor housing 3 is provided with a mounting groove 2 31; the cooling plate 4 is connected to a liquid inlet nozzle 46, and the liquid inlet of the liquid inlet nozzle 46 forms a liquid inlet 42. Along the radial direction of the motor, the liquid inlet nozzle 46 is at least partially embedded and installed in the mounting groove 1 13, and the remaining part is installed in the mounting groove 2 31; the motor housing 3 is provided with a liquid inlet through hole 321, and the liquid inlet through hole 321 is connected to the liquid inlet of the liquid inlet nozzle 46.

[0060] In this embodiment, the liquid inlet nozzle 46 is partially embedded in the mounting groove 1 13 and partially installed in the mounting groove 2 31, and is connected to the outside of the motor housing 3 through the liquid inlet hole 321. The coolant can directly enter the liquid inlet nozzle 46 through the liquid inlet hole 321 and then flow into the cooling plate 4 without the need for additional external pipes or joints, thereby simplifying the cooling structure. The close fit between the liquid inlet nozzle 46 and the mounting groove 1 13 and the mounting groove 2 31, as well as the sealed connection between the liquid inlet hole 321 and the liquid inlet nozzle 46, together constitute a sealed barrier for the cooling structure. This design effectively prevents the leakage of the coolant and ensures the stable operation of the cooling structure. Through the coordinated work of the liquid inlet hole 321, the liquid inlet nozzle 46, the cooling plate 4 and the pipeline system (pipeline 1 43, pipeline 2 44), the coolant can flow along a predetermined path, fully contact the heat-generating components of the motor, and improve the cooling efficiency. The embedded design of the liquid inlet nozzle 46 makes its installation easier. The embedded design of the liquid inlet nozzle 46 makes the appearance of the motor more neat and beautiful, and improves the overall visual effect and quality of the motor.

[0061] In conjunction with the second aspect, in one embodiment, Figure 6 、 Figure 7 and Figure 10 As shown, along the axial direction of the motor, one end of the second mounting groove 31 passes through the outside of the motor housing 3 , and the other end thereof is located inside the motor housing 3 .

[0062] In this embodiment, during the motor assembly process, the stator core 1 with the cooling plate 4, that is, the liquid inlet nozzle 46 has been embedded and installed in the mounting groove 1 13. The liquid inlet nozzle 46 is aligned with the starting end of the mounting groove 2 31, and the stator core 1 is pushed along the axial direction of the motor until the liquid inlet nozzle 46 abuts against the end of the mounting groove 2 31, thereby positioning and installing the stator core 1.

[0063] In conjunction with the second aspect, in one embodiment, Figure 7 and Figure 9 As shown, the inner wall of the motor housing 3 is designed with a stop step 35, which is further used for the installation and positioning of the stator core 1. The stop step 35 is designed with a sunken square groove 36 to ensure the positioning and assembly of the liquid inlet nozzle 46 and prevent the stop step 35 from occupying the space of the installation groove 2 31.

[0064] In conjunction with the second aspect, in one embodiment, Figure 4 、 Figure 6 、 Figure 10 and Figure 11As shown, the stator slot cooling structure also includes: pipeline three 45, pipeline three 45 is connected to pipeline one 43, pipeline three 45 and pipeline two 44 are located in the same slot 12, pipeline three 45 and pipeline two 44 are spaced apart in the radial direction of the stator core 1, and a second liquid outlet 451 is provided at one end of pipeline three 45 away from pipeline one 43; the cooling plate 4, pipeline one 43, pipeline two 44 and pipeline three 45 form a group of cooling components, and there are two cooling components. The cooling plate 4 of the first cooling component is attached to one end surface of the stator core 1, and the cooling plate 4 of the second cooling component is attached to the other end surface of the stator core 1; the pipelines two 44 and pipeline three 45 of the two cooling components are arranged in one slot 12; there are two drain ports 33, the first drain port 33 is connected to one end chamber of the motor housing 3, and the second drain port 33 is connected to the other end chamber of the motor housing 3.

[0065] In this embodiment, pipeline three 45 is connected to pipeline one 43, ensuring the smooth flow of the coolant. At the same time, pipeline three 45 and pipeline two 44 are cleverly arranged in the same tooth slot 12 and are spaced apart along the radial direction of the stator core 1. This layout not only optimizes the distribution of the coolant, but also improves the cooling efficiency. A liquid outlet two 451 is provided at one end of pipeline three 45 away from pipeline one 43 to ensure that the coolant can be discharged smoothly after flowing through pipeline three 45. The cooling plate 4, pipeline one 43, pipeline two 44 and pipeline three 45 together constitute a group of cooling components. There are two cooling components, which are respectively attached to the end faces of the stator core 1. This double-end arrangement makes the cooling more uniform and effectively reduces the overall temperature rise of the stator core 1. Pipe two 44 and pipeline three 45 of the two cooling components are arranged in the same tooth slot 12, further improving the utilization rate and cooling efficiency of the coolant. There are two drain ports 33, which are respectively connected to the two end chambers of the motor housing 3. This design ensures that after the coolant flows through the stator core 1 and is discharged into the chambers at both ends of the motor housing 3, it can be smoothly discharged from the motor housing 3 through the drain port 33 and enter the subsequent coolant supply system for circulating cooling. The design of the double-ended drain port 33 enables the coolant after heat exchange transported by the cooling component at the opposite end to be discharged from the motor housing 3. By adding pipeline three 45, efficient cooling of the stator core 1 is achieved, fully contacting and cooling various parts of the stator core 1, and effectively reducing the temperature rise. The design of the double-ended cooling component and the double drain port 33 makes the cooling more uniform, and all parts of the stator core 1 can be fully cooled, avoiding the occurrence of local overheating. By reducing the temperature rise of the stator core 1, the efficiency and output power of the motor are improved. At the same time, uniform cooling also extends the service life of the motor and improves the overall performance of the motor.

[0066] In combination with the second aspect, in one embodiment, the cooling liquid supply system, the output end of the cooling liquid supply system is connected to the liquid inlet 42, and the input end of the cooling liquid supply system is connected to the liquid drain 33.

[0067] In this embodiment, by connecting the output end of the coolant supply system to the liquid inlet 42, the coolant can accurately enter the stator tooth slot cooling structure inside the motor. At the same time, the connection between the input end and the drain port 33 ensures that the coolant can be discharged smoothly after flowing through the motor, forming a complete coolant circulation path. This design avoids the retention and accumulation of coolant and ensures the continuous flow and renewal of coolant. This connection method of the coolant supply system allows the coolant to flow quickly and evenly through various key parts of the motor, especially the stator core 1 and winding 2 and other areas prone to heat, which greatly enhances the cooling effect and effectively reduces the temperature rise of the motor, thereby improving the efficiency and output power of the motor.

[0068] In combination with the second aspect, in one embodiment, the thickness of the cooling plate 4 is smaller than the height of the gap between the end surface of the stator core 1 and the winding 2 in the slot 12, and is generally less than 5 mm.

[0069] In conjunction with the second aspect, in one embodiment, Figure 6 and Figure 11 As shown, the second pipe 44 is as wide as the flat wire of the winding 2 in the tooth slot 12 and is smaller than the width of the tooth slot 12. The third pipe 45 is in contact with the inner wall of the tooth tip 14 and has a trapezoidal structure, ensuring effective cooling of the tooth portion 11 without occupying excess space in the tooth slot 12.

[0070] In conjunction with the second aspect, in one embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, there are two groups of cooling assemblies, which are respectively installed in the tooth slots 12 of the stator core 1 and are fitted with the two ends of the stator core 1. The two groups of liquid inlet nozzles 46 are axially opposite to each other. The two groups of pipelines 44 (or pipelines 45) are staggered by a stator tooth slot angle a (for example, the number of stator slots is N, and the staggered angle is a, a=360° / N). When the pipelines 44 are installed before the winding 2 is inserted into the stator core 1, the number of pipelines 44 is n, n=N / 2.

[0071] In conjunction with the second aspect, in one embodiment, Figure 11As shown, when two sets of cooling components are installed in the motor housing 3, the installation groove three 32 can be further opened on the inner bottom wall of the installation groove two 31 to form a drainage chamber, and the liquid inlet hole 321 is connected to the installation groove three 32, that is, the external coolant flows through the liquid inlet hole 321 to the installation groove three 32 to form the drainage chamber, and then flows into the corresponding cooling plate 4 through the liquid inlet ports of the liquid inlet nozzles 46 at both ends, thereby improving the curved path setting of the liquid inlet nozzle 46 and ensuring the circulation efficiency of the coolant.

[0072] In conjunction with the second aspect, in one embodiment, Figure 11 As shown, when two sets of cooling components are installed in the motor housing 3, a liquid collection port 34 is opened on the side wall of the motor housing 3, and the liquid collection port 34 is connected with the drain ports 33 at the two end chambers of the motor housing 3 through two liquid collection channels, that is, the coolant after heat exchange at the two end chambers enters the subsequent coolant supply system through the liquid collection port 34.

[0073] To summarize, first, this stator slot cooling structure effectively increases the heat dissipation area of ​​the stator core 1. On the one hand, it cools the end faces of the stator core 1, the end faces of the teeth 11, the tooth tips 14, and the windings 2. On the other hand, the cooling oil sprayed from pipeline 2 44 and pipeline 3 45 sprays and cools the outer and inner diameters of the ends of the windings 2. This increased heat dissipation area not only improves the motor's heat dissipation capacity, reduces thermal fatigue damage, increases the motor's service life, and improves the motor's sustained performance output and efficiency.

[0074] Secondly, the stator slot cooling structure's pipes 2 44 and 3 45 are simple in structure and easy to install. Their plug-in design facilitates secure fixation and effectively prevents leakage. ① Two cooling assemblies are installed at either end of the stator core 1 and inserted into the slots 12 with radial offset. The designed pipes 2 44 and 3 45 conform to the stator core 1 and slots 12, effectively avoiding interference during flat wire insertion and twisting, while ensuring smooth flow of coolant into the slots 12.

[0075] Third, the liquid inlet nozzle 46 is cleverly designed to work with the stator core 1 and the motor housing 3 to solve the problem of oil leakage. The liquid inlet nozzles of the two sets of cooling components are fixed by the mounting groove 13 and the mounting groove 2 31, and together with the mounting groove 3 32, form a drainage chamber on the outer diameter of the motor housing 3 and the stator core 1. The coolant is guided to flow into the liquid inlet hole 321 and the drainage chamber, then enters the liquid inlet nozzle 46, and then passes around the teeth 11 and tooth tips 14 of the stator core 1 to dissipate heat from the winding 2 and the core in the tooth slots 12 of the stator core 1. Because these coolants are guided by pipes 2 44 and 3 45, they will not leak into the air gap between the stator and the rotor, causing oil stirring loss and heat verification and burn-in problems. After the coolant flows out of the tooth slots 12, it is sprayed onto the inner and outer diameter surfaces of the two ends of the winding 2, forcing the ends of the winding 2 to dissipate heat, further improving the heat dissipation capacity of the winding 2. Finally, the coolant flows out from the liquid collection port 34 of the motor housing 3 for recycling.

[0076] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0077] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0078] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A stator slot cooling structure, characterized in that: It includes: A cooling plate (4), wherein an end surface of the cooling plate (4) is provided with a through hole (41), wherein the through hole (41) is used to be coaxially arranged with the stator core (1), and the cooling plate (4) is provided with a liquid inlet (42), wherein the cooling plate (4) is used to be attached to an end surface of the stator core (1); Pipeline 1 (43), the pipeline 1 (43) is connected to the interior of the cooling plate (4), and the pipeline 1 (43) is used to fit the end surface of the tooth portion (11); Pipeline 2 (44), the pipeline 2 (44) is connected to the pipeline 1 (43), the pipeline 2 (44) is used to be located in the tooth groove (12), and the end of the pipeline 2 (44) away from the pipeline 1 (43) is provided with a liquid outlet 1 (441); The cooling plate (4) is connected to a liquid inlet nozzle (46), the liquid inlet of the liquid inlet nozzle (46) forms the liquid inlet (42), and the liquid inlet of the liquid inlet nozzle (46) is used to communicate with the outside of the motor housing (3). Along the radial direction of the stator core (1), at least a portion of the liquid inlet nozzle (46) is used to be embedded in the outer wall of the stator core (1), and another portion thereof is used to be embedded in the inner wall of the motor housing (3); The outer side wall of the stator core (1) is provided with a first mounting groove (13), and the inner side wall of the motor housing (3) is provided with a second mounting groove (31); Along the radial direction of the motor, the liquid inlet nozzle (46) is at least partially embedded in the first mounting groove (13), and the remaining portion is installed in the second mounting groove (31); The motor housing (3) is provided with a liquid inlet through hole (321), and the liquid inlet through hole (321) is communicated with the liquid inlet of the liquid inlet nozzle (46).

2. The stator slot cooling structure according to claim 1, characterized in that: The pipeline one (43) and the pipeline two (44) form a group of cooling pipelines one, and the number of the cooling pipelines one is consistent with the number of the teeth (11).

3. The stator slot cooling structure according to claim 1, wherein: The stator slot cooling structure further includes: Pipeline three (45), the pipeline three (45) is connected to the pipeline one (43), the pipeline three (45) and the pipeline two (44) are used to be located in the same tooth slot (12), the pipeline three (45) and the pipeline two (44) are used to be spaced apart along the radial direction of the stator core (1), and the pipeline three (45) is provided with a liquid outlet two (451) at one end away from the pipeline one (43).

4. The stator slot cooling structure according to claim 3, characterized in that: The pipeline one (43), the pipeline two (44) and the pipeline three (45) form a group of cooling pipelines two, and the number of the cooling pipelines two is consistent with the number of the teeth (11).

5. A motor, characterized in that: It includes: Motor housing (3); A stator core (1), the stator core (1) being installed in the motor housing (3), the inner side wall of the stator core (1) being provided with a plurality of teeth (11) spaced circumferentially, and a tooth slot (12) being formed between two adjacent teeth (11); A cooling plate (4), wherein an end surface of the cooling plate (4) is provided with a through hole (41), the through hole (41) is coaxially arranged with the stator core (1), the cooling plate (4) is provided with a liquid inlet (42), and the cooling plate (4) is attached to an end surface of the stator core (1); Pipeline 1 (43), the pipeline 1 (43) is connected to the interior of the cooling plate (4), and the pipeline 1 (43) is attached to the end surface of the tooth portion (11); Pipeline 2 (44), the pipeline 2 (44) is connected to the pipeline 1 (43), the pipeline 2 (44) is located in the tooth groove (12), the pipeline 2 (44) is provided with a liquid outlet 1 (441) at one end away from the pipeline 1 (43), and a liquid discharge port (33) is provided in a chamber at one end of the motor housing (3) close to the liquid outlet 1 (441) along the axial direction of the motor; The cooling plate (4) is connected to a liquid inlet nozzle (46), the liquid inlet of the liquid inlet nozzle (46) forms the liquid inlet (42), the liquid inlet of the liquid inlet nozzle (46) is connected to the outside of the motor housing (3), and along the radial direction of the stator core (1), the liquid inlet nozzle (46) is at least partially embedded in the outer wall of the stator core (1), and another part thereof is embedded in the inner wall of the motor housing (3); The outer side wall of the stator core (1) is provided with a first mounting groove (13), and the inner side wall of the motor housing (3) is provided with a second mounting groove (31); Along the radial direction of the motor, the liquid inlet nozzle (46) is at least partially embedded in the first mounting groove (13), and the remaining portion is installed in the second mounting groove (31); The motor housing (3) is provided with a liquid inlet through hole (321), and the liquid inlet through hole (321) is communicated with the liquid inlet of the liquid inlet nozzle (46).

6. The motor according to claim 5, characterized in that Along the axial direction of the motor, one end of the second mounting groove (31) passes through the outside of the motor housing (3), and the other end is located inside the motor housing (3).

7. The motor according to claim 5, characterized in that The motor further comprises: Pipeline three (45), the pipeline three (45) is connected to the pipeline one (43), the pipeline three (45) and the pipeline two (44) are located in the same tooth slot (12), the pipeline three (45) and the pipeline two (44) are spaced apart along the radial direction of the stator core (1), and the pipeline three (45) is provided with a second liquid outlet (451) at one end away from the pipeline one (43); The cooling plate (4), the pipeline 1 (43), the pipeline 2 (44) and the pipeline 3 (45) form a group of cooling components, and the number of the cooling components is two. The cooling plate (4) of the first cooling component is attached to one end face of the stator core (1), and the cooling plate (4) of the second cooling component is attached to the other end face of the stator core (1); The second pipe (44) and the third pipe (45) of the two cooling components are arranged in one tooth groove (12); There are two drainage ports (33), the first drainage port (33) is in communication with a chamber at one end of the motor housing (3), and the second drainage port (33) is in communication with a chamber at the other end of the motor housing (3).

8. The motor according to claim 5, wherein A cooling liquid supply system, wherein the output end of the cooling liquid supply system is in communication with the liquid inlet (42), and the input end of the cooling liquid supply system is in communication with the liquid outlet (33).

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