Stator tooth groove cooling structure and motor

Abstract

The invention relates to a stator tooth groove cooling structure and a motor, and the structure comprises a cooling plate, the end face of the cooling plate is provided with a through hole, the through hole is used for being coaxial with a stator iron core, the cooling plate is provided with a liquid inlet, and the cooling plate is used for being attached to the end face of one end of the stator iron core; the first pipeline is communicated with the interior of the cooling plate, and the first pipeline is used for being attached to the end face of a tooth part; and the second pipeline communicates with the first pipeline, the second pipeline is used for being located in a tooth groove, and a first liquid outlet is formed in the end, away from the first pipeline, of the second pipeline. The integrated design of the cooling plate, the first pipeline and the second pipeline enables the whole cooling structure to be compact and easy to install, does not occupy too much motor space, facilitates the lightweight and integrated design of the motor, remarkably improves the cooling efficiency, reduces the temperature of the stator core, the tooth part and the winding, and improves the service life of the motor. Therefore, the service life of the motor is prolonged and the performance of the motor is improved.

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 the motor system directly affects the service life and performance output of the motor, as well as efficiency and other issues. According to the electromagnetic induction principle of the motor, when the motor is running, due to the excitation of the current, the stator generates an induced rotating magnetic field to make the motor rotor rotate and work. When the motor is working, the stator is the main source of heat, especially the windings and iron core inside the stator's teeth. The heat dissipation capacity of the motor system directly affects whether the motor can operate normally and efficiently. Good heat dissipation capacity of the motor system can extend the service life of the motor, improve the continuous performance output of the motor, and also greatly help improve the efficiency of the motor.

[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 the heat to the motor teeth and windings. The 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, which includes:

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

[0007] Pipeline 1, the pipeline 1 is connected to the interior of the cooling plate, and the pipeline 1 is used to fit the end surface of the tooth portion;

[0008] Pipeline 2 is connected with 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 implementation, the pipeline one and the pipeline two form a group of cooling pipeline one, and the number of the cooling pipeline one is used to be consistent with the number of teeth.

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

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

[0012] In combination with the first aspect, in one implementation, the pipeline one, the pipeline two and the pipeline three form a group of cooling pipeline two, and the number of the cooling pipelines two is consistent with the number of 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, the liquid inlet nozzle is at least partially used to be embedded in the outer wall of the stator core, and another part thereof is used to be embedded in the inner 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, the stator core is installed in the motor housing, a plurality of teeth are arranged circumferentially at intervals on the inner side wall of the stator core, 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 is connected with pipeline 1, and pipeline 2 is located in the tooth groove. An end of pipeline 2 away from pipeline 1 is provided with liquid outlet 1, and along the axial direction of the motor, a cavity at one end of the motor housing close to the liquid outlet 1 is provided with a drain port.

[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 and installed in the first installation groove, and the remaining part thereof is installed in the second installation 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 port of the liquid inlet nozzle.

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

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

[0025] Pipeline three, the pipeline three is connected with the pipeline one, the pipeline three and the pipeline two are located in the same tooth slot, the pipeline three and the pipeline two are spaced apart in the radial direction of the stator core, and the end of the pipeline three away from the pipeline one is provided with a liquid outlet two;

[0026] The cooling plate, the pipeline 1, the pipeline 2 and the pipeline 3 form a group of cooling components, the number of the cooling components is two, 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 pipeline 2 and the pipeline 3 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 chamber at one end of the motor housing, and the second of which is communicated with a chamber 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 brought by the technical solution provided in the embodiments of the present application include:

[0031] The coolant is introduced through the liquid inlet on the cooling plate, and 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; the pipeline one is connected with the inside of the cooling plate and fits the end face of the tooth portion, so that the coolant can directly cool the tooth portion, thereby reducing the temperature of the tooth portion; the pipeline two is located in the tooth slot and flows out through the 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 occupy 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

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

[0034] Figure 2 for Figure 1 A rear view structural diagram of ;

[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] Fig. 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] Fig.10 for Fig. 9 A schematic cross-sectional structure diagram of ;

[0043] Fig.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 solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, 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 surface 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 fit on one end surface of the stator core 1; a pipeline 43, the pipeline 43 is connected to the interior of the cooling plate 4, and the pipeline 43 is used to fit on the end surface of the tooth portion 11; a pipeline 44, the pipeline 44 is connected to the pipeline 43, the pipeline 44 is used to be located in the tooth slot 12, and a liquid outlet 441 is provided at one end of the pipeline 44 away from the pipeline 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 closely attached 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 end face of the stator core. Pipeline 1 43 is connected to the inside of the cooling plate 4 and is attached to the end face of the tooth portion 11, so that the coolant can flow through pipeline 1 43 to 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 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, the first pipe 43 and the second pipe 44, the coolant can flow evenly through the end face of the stator core 1, the end face of the tooth 11 and the tooth slot 12, realizing uniform cooling of the internal components of the motor, which 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, the first pipe 43 and the second pipe 44 makes the entire cooling structure compact and easy to install. The second pipe 44 is inserted into the corresponding tooth slot 12 until the cooling plate 4 and the first pipe 43 are against the end face of the stator core 1 and the end face of the tooth 11, which will not take up too much motor space, and 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 conducive to the maintenance and maintenance 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 the vibration and wear of the motor and extend the service life of the motor.

[0049] In combination with the first aspect, in one implementation, pipeline one 43 and pipeline two 44 form a group of cooling pipeline one, and the number of cooling pipelines one is used to be consistent with the number of teeth 11.

[0050] In this embodiment, each tooth 11 and tooth slot 12 of the motor corresponds to a group of cooling pipes 1, which means that each tooth 11 and tooth slot 12 can be directly supplied with coolant. This design ensures that the coolant can accurately flow through each tooth 11 and tooth slot 12, realizes accurate cooling of the tooth 11 and tooth slot 12, and effectively reduces the temperature of the tooth 11 and tooth slot 12. This design has strong adaptability and can be applied to motors with different numbers of teeth 11. No matter how many teeth 11 the motor has, it can be adapted by increasing or decreasing the number of cooling pipes 1 of the cooling structure.

[0051] In combination with the first aspect, in one embodiment, Figure 1 , Figure 2 and Figure 3As shown, the stator tooth 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 tooth 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 pipeline 3 45 provides more cooling liquid flow paths in the same tooth groove 12, such as Figure 6 As shown, the pipeline 2 44 and the 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 in 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 in the tooth slot 12 area can be effectively controlled and improves the uniformity of cooling. The connection between the pipeline 3 45 and the pipeline 1 43, as well as the interval distribution between the pipeline 3 45 and the pipeline 2 44 in the tooth slot 12, provide a smoother flow path for the coolant. The coolant can flow from the pipeline 1 43 into the pipeline 2 44 and the pipeline 3 45, and then flow out through the liquid outlet 1 441 and the liquid outlet 2 451 respectively, forming an effective cooling that 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, and improve the running stability and reliability of the motor.

[0053] In combination with the first aspect, in one implementation, 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 pipelines 2, it is ensured that each tooth 11 and tooth groove 12 can be fully and accurately cooled. The coordinated work of pipeline 1 43, pipeline 2 44 and pipeline 3 45 allows the coolant to be distributed to each tooth 11 and tooth groove 12, covering the end face of the tooth 11 and the key area in the tooth groove 12, achieving efficient heat exchange, promoting the uniform flow of the coolant, and avoiding the appearance of cooling blind spots or overheating areas. This design not only improves the cooling efficiency, but also ensures the uniform distribution of the temperature inside the motor, which helps to extend the service life of the motor.

[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 part of the liquid inlet nozzle 46 is used to be embedded in the outer wall of the stator core 1, and another part of it 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 Fig.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 enables it to make full use of 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 lighten the motor. The liquid inlet nozzle 46 is tightly fitted with the stator core 1 and the motor housing 3. The embedded design of the liquid inlet nozzle 46 makes its installation easier. 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. At the same time, this design is also convenient for later 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, and improves the overall visual effect of the motor.

[0057] Second, as Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.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 the inner side wall of the stator core 1 is circumferentially spaced with a plurality of teeth 11, and a tooth groove 12 is formed between two adjacent teeth 11; a cooling plate 4, the 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 one end surface of the stator core 1; a pipeline 43, the pipeline 43 is connected with the interior of the cooling plate 4, and the pipeline 43 is attached to the end surface of the tooth 11; a pipeline 44, the pipeline 44 is connected with the pipeline 43, the pipeline 44 is located in the tooth groove 12, the end of the pipeline 44 away from the pipeline 43 is provided with a liquid outlet 441, and along the axial direction of the motor, the end chamber of the motor housing 3 close to the liquid outlet 441 is provided with a drain port 33.

[0058] In this embodiment, a cooling structure consisting of a cooling plate 4, a pipeline 1 43, a pipeline 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 fits on one end face of the stator core 1, ensuring that the coolant can directly act on the heat-generating part of the end face of the stator core 1. The connection design of pipeline 1 43 and pipeline 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. Pipeline 1 43 is connected to the inside of the cooling plate 4 and fits on the end face of the tooth 11 to guide the coolant to the tooth 11. Pipeline 2 44 is located in the tooth groove 12 and is connected to pipeline 1 43 to form a flow path for the coolant, fully contacting the heat-generating components of the motor and improving the cooling efficiency. Fig.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 outlet port 1 441. This design allows the coolant to enter the right end chamber after flowing through the pipeline 2 44, and can be smoothly discharged from the motor through the drain port 33, thereby 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 pipeline 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 without the need for complicated installation steps or additional fixings, thereby reducing the manufacturing cost and installation difficulty.

[0059] In conjunction with the second aspect, in one implementation, Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig.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 through hole 321. The coolant can directly enter the liquid inlet nozzle 46 through the liquid inlet through hole 321, and then flow into the cooling plate 4, without the need for additional external pipes or joints, which simplifies 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 through 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 through 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, and 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 implementation, Figure 6 , Figure 7 and Fig.10 As shown, along the axial direction of the motor, one end of the second mounting groove 31 penetrates to 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 implementation, Figure 7 and Fig. 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 implementation, Figure 4 , Figure 6 , Fig.10 and Fig.11As shown, the stator tooth slot cooling structure also includes: pipeline three 45, pipeline three 45 is connected with pipeline one 43, pipeline three 45 and pipeline two 44 are located in the same tooth 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 the number of cooling components is two, 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 pipeline two 44 and pipeline three 45 of the two cooling components are arranged in one tooth slot 12; the number of drainage ports 33 is two, the first drainage port 33 is connected to one end chamber of the motor housing 3, and the second drainage port 33 is connected to the other end chamber of the motor housing 3.

[0065] In this embodiment, pipeline three 45 is connected with 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. One end of pipeline three 45 away from pipeline one 43 is provided with a liquid outlet two 451 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, and the number of cooling components is two, which are respectively attached to the end faces of the two ends 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. The pipeline two 44 and pipeline three 45 of the two cooling components are arranged in the same tooth slot 12, which further improves the utilization rate and cooling efficiency of the coolant. The number of the discharge ports 33 is two, 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 to 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-end 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, and each part of the stator core 1 is fully contacted and cooled, effectively reducing the temperature rise. The design of the double-end 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. The efficiency and output power of the motor are improved by reducing the temperature rise of the stator core 1. 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 port 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 the coolant and ensures the continuous flow and renewal of the 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 the 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 implementation, the thickness of the cooling plate 4 is smaller than the gap height between the end surface of the stator core 1 and the winding 2 in the tooth slot 12, and is generally less than 5 mm.

[0069] In conjunction with the second aspect, in one implementation, Figure 6 and Fig.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 fits the inner wall of the tooth tip 14 and forms 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 implementation, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, there are two groups of cooling components, which are respectively installed in the tooth slots 12 of the stator core 1 and are installed in contact with the two ends of the stator core 1. The two groups of liquid inlet nozzles 46 are axially opposite to each other, and the two groups of pipelines 44 (or pipelines 45) are staggered by a stator tooth slot angle a (if the number of stator slots is N, the offset angle is a, a = 360° / N). When the pipelines 44 are installed before the windings 2 are 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 implementation, Fig.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 with the installation groove three 32, that is, the external coolant flows into the installation groove three 32 through the liquid inlet hole 321 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 implementation, Fig.11 As shown, when two sets of cooling components are installed in the motor housing 3, a liquid collecting port 34 is opened on the side wall of the motor housing 3, and the liquid collecting port 34 is connected with the discharge ports 33 at the two end chambers of the motor housing 3 through two liquid collecting channels, that is, the coolant after heat exchange at the two end chambers enters the subsequent coolant supply system through the liquid collecting port 34.

[0073] In summary, firstly, the stator tooth slot cooling structure effectively increases the heat dissipation area of ​​the stator core 1. On the one hand, the end face of the stator core 1, the end face of the tooth 11, the tooth tip 14 and the position of the winding 2 can be cooled; on the other hand, the cooling oil sprayed from the second pipeline 44 and the third pipeline 45 can spray and cool the outer diameter and inner diameter of the ends of the winding 2. The increase in the heat dissipation area not only improves the heat dissipation capacity of the motor, but also reduces the thermal fatigue damage of the motor, increases the service life of the motor, and also improves the continuous performance output and efficiency of the motor.

[0074] Second, the structure of the second pipe 44 and the third pipe 45 of the stator tooth slot cooling structure is simple, easy to install, and the plug-in structure design is easy to fix and effectively suppress leakage. ① The cooling assembly has two groups, which are installed at both ends of the stator core 1 and inserted into the tooth slot 12 with radial offset. The designed second pipe 44 and the third pipe 45 can fit the stator core 1 and the tooth slot 12, effectively avoiding the interference problem of the flat wire insertion and twisting process, and can smoothly introduce the coolant into the tooth slot 12 for circulation.

[0075] Thirdly, the liquid inlet nozzle 46 is cleverly designed to cooperate 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 form a liquid discharge chamber with the outer diameter of the motor housing 3 and the stator core 1 together with the mounting groove 3 32. The coolant is guided to flow into the liquid inlet through hole 321 and the liquid discharge chamber, and then enters the liquid inlet nozzle 46, and then passes around the tooth portion 11 and the tooth tip 14 of the stator core 1 to dissipate heat for the winding 2 and the core in the tooth slot 12 of the stator core 1. Because these coolants are guided by pipeline 2 44 and pipeline 3 45, they will not cause the coolant to leak into the air gap between the stator and the rotor, causing oil stirring loss and the problem of burning due to heat verification. After the coolant flows out of the tooth slot 12, it is sprayed onto the inner diameter and outer diameter surfaces of the two ends of the winding 2, forcing the end 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 collecting port 34 of the motor housing 3 for recycling.

[0076] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 the present application and simplifying the description, rather than indicating or implying 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 the present 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present 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 only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such 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 including 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, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0078] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

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 one (43), the pipeline one (43) is connected to the interior of the cooling plate (4), and the pipeline one (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 a liquid outlet 1 (441) is provided at one end of the pipeline 2 (44) away from the pipeline 1 (43).

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 cooling pipelines one is consistent with the number of teeth (11).

3. The stator slot cooling structure according to claim 1, characterized in that: The stator slot cooling structure 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 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 and distributed along the radial direction of the stator core (1), and the end of the pipeline three (45) away from the pipeline one (43) is provided with a liquid outlet two (451).

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 cooling pipelines two is consistent with the number of teeth (11).

5. The stator slot cooling structure according to claim 1, characterized in that: 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 part of the liquid inlet nozzle (46) is used to be embedded in the outer wall of the stator core (1), and another part of it is used to be embedded in the inner wall of the motor housing (3).

6. 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), a plurality of teeth (11) being arranged at intervals in the circumferential direction on the inner side wall of the stator core (1), 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 one (43), the pipeline one (43) is connected to the interior of the cooling plate (4), and the pipeline one (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 end of the pipeline 2 (44) away from the pipeline 1 (43) is provided with a liquid outlet 1 (441), and along the axial direction of the motor, the end chamber of the motor housing (3) close to the liquid outlet 1 (441) is provided with a liquid discharge port (33).

7. The motor according to claim 6, characterized in that 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); 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 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 part 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 connected to the liquid inlet port of the liquid inlet nozzle (46).

8. The motor according to claim 7, characterized in that Along the axial direction of the motor, one end of the second mounting groove (31) penetrates to the outside of the motor housing (3), and the other end is located inside the motor housing (3).

9. The motor according to claim 6, characterized in that The stator slot cooling structure 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 in the radial direction of the stator core (1), and a second liquid outlet (451) is provided at one end of the pipeline three (45) 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 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 pipeline 2 (44) and the pipeline 3 (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).

10. The motor according to claim 6, characterized in that 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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