A stator end portion oil cooling heat dissipation system with multiple types of jet orifices alternately distributed and motor

Abstract

The application relates to a stator end oil cooling heat dissipation system with multiple types of jet orifices alternately distributed and a motor, and relates to the technical field of motors. The application comprises a machine frame, the inside of the machine frame is provided with a motor stator, and annular lubricating grooves are arranged at equal distances on the outer wall of the motor stator; the inner wall of the annular lubricating grooves is fixedly connected with T-shaped strips arranged at equal distances; and transverse oil holes arranged at equal distances are vertically arranged between every two annular lubricating grooves. The annular lubricating grooves and the transverse oil holes are alternately distributed, multiple oil flow paths are formed, the contact area of the cooling oil and the outer surface of the motor stator is expanded, the T-shaped strips can prolong the residence time of the oil through the effect of flow disturbance, and the vertical opening design of the rotor inner layer oil inlet jet orifice and the rotor inner layer oil outlet hole realizes the cooperative heat dissipation of the motor stator and the motor rotor, local overheating is avoided, the structure can form a three-dimensional heat dissipation network of the oil on the outer surface of the motor stator, and the comprehensive heat dissipation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a stator end oil cooling heat dissipation system and motor with alternating distribution of multiple types of nozzles. Background Technology

[0002] Stator end oil cooling systems are one of the key heat dissipation technologies in the motor industry. They utilize an oil circuit structure at the stator end to conduct and dissipate the heat generated during motor operation using cooling oil. Traditional oil cooling systems typically employ a single type of nozzle or oil channel to inject cooling oil into the stator end, where the oil flow carries away the heat. While such systems can reduce the temperature rise of the stator and rotor to some extent, the limited contact area between the cooling oil and the motor end due to the simple oil circuit design results in insufficient heat dissipation efficiency to meet the requirements of high-power-density motors. Furthermore, oil circulation often relies on an external independent oil pump, which not only increases system complexity but also reduces the energy efficiency ratio.

[0003] As motor technology advances towards higher power density and efficiency, traditional stator end oil-cooling systems are increasingly showing limitations in handling complex thermal loads. Early oil-cooling systems often employed a single axial or radial oil channel design, such as uniformly spaced circular nozzles at the stator end, with cooling oil injected linearly into the channels via an external oil pump. While this design achieves basic heat dissipation, under high-speed and high-torque conditions, the distribution of heat sources within the motor becomes non-uniform, with significant heat accumulation at the stator winding ends and rotor ends.

[0004] Industry research indicates that under extreme operating conditions (such as continuous hill climbing or high-speed braking in electric vehicles), the instantaneous thermal load on a motor can reach 2-3 times its steady-state value. Actual test data from a certain brand of permanent magnet synchronous motor shows that, under peak power operation, traditional oil-cooled systems experience a local temperature gradient of 50℃ / cm at the stator end, triggering thermal stress deformation and increasing air gap non-uniformity by 15μm, directly impacting motor efficiency and NVH performance. These issues have created an urgent need for new cooling systems: systems that can achieve a three-dimensional heat dissipation network to match complex heat source distributions, while also reducing reliance on external accessories through self-driving circulation.

[0005] In existing technologies, oil-cooling heat dissipation solutions at the stator ends of motors have significant shortcomings:

[0006] 1. Single heat dissipation method: Traditional nozzles have poor uniformity of distribution, and the cooling oil is sprayed in only one direction, which cannot cover the complex heat source area at the end of the stator, resulting in excessively high local temperature.

[0007] 2. Short contact time of cooling oil: The oil does not stay at the stator end for long enough, resulting in insufficient heat exchange and limited heat dissipation.

[0008] 3. Reliance on external oil pumps: Existing systems require an independent oil pump to drive the cooling oil circulation, which occupies extra space and increases energy consumption, and is especially difficult to adapt to compact motors. Summary of the Invention

[0009] The purpose of this application is to provide a stator end oil cooling heat dissipation system and motor with alternating distribution of multiple types of nozzles, which overcomes the shortcomings of the prior art and mainly solves the following technical problems: single heat dissipation method, short contact time of cooling oil, and reliance on external oil pump for circulating heat dissipation.

[0010] In a first aspect, this application provides a stator end oil cooling system with alternating distribution of multiple types of spray holes, employing the following technical solution: It includes a frame, inside which a motor stator is disposed, and on the outer wall of the motor stator are equidistantly distributed annular lubrication grooves. Equidistantly distributed T-shaped strips are fixedly connected to the inner wall of each annular lubrication groove. Equidistantly distributed transverse oil holes are permeated between every two annular lubrication grooves. Rotor inner layer oil inlet spray holes are disposed on the inner wall of the annular lubrication grooves, and rotor inner layer oil outlet holes are disposed around the periphery of both sides of the outer wall of the motor stator. The opening directions of the rotor inner layer oil inlet spray holes and the transverse oil holes, as well as the opening directions of the rotor inner layer oil inlet spray holes and the transverse oil holes, are perpendicular to each other.

[0011] By adopting the above technical solution, the annular lubrication grooves on the outer wall of the motor stator are evenly distributed, and T-shaped strips are welded inside the grooves to enhance oil turbulence. A transverse oil hole is opened between every two lubrication grooves. The axis of the transverse oil hole is perpendicular to the oil inlet spray hole in the inner layer of the rotor, forming a cross oil path. This design allows the oil to be injected vertically into the end of the motor stator from the spray hole and then diffused laterally through the transverse oil hole, covering a larger heat dissipation area.

[0012] The alternating distribution of annular lubrication grooves and transverse oil holes forms a multi-directional oil flow path, increasing the contact area between the cooling oil and the outer surface of the motor stator. The T-shaped bars can prolong the residence time of the oil through turbulence, enhancing heat conduction. Furthermore, the vertical opening design of the oil inlet spray holes and oil outlet holes in the inner layer of the rotor enables coordinated heat dissipation of the motor stator and the motor rotor, avoiding local overheating. This structure enables the oil to form a three-dimensional heat dissipation network on the outer surface of the motor stator, improving the overall heat dissipation efficiency.

[0013] Preferably, an oil injection head is welded to the inner wall of the top of the machine frame, and an oil injection nozzle is opened on the outer wall of the bottom of the oil injection head. The oil injection nozzle corresponds one-to-one with the annular lubrication groove, and the oil injection nozzle is located at the top of the annular lubrication groove. An oil drain seat is welded to the inner wall of the bottom of the machine frame.

[0014] By adopting the above technical solution, the oil injection head is welded to the top of the machine frame, and its oil injection nozzles correspond one-to-one with the annular lubrication grooves. Oil is precisely injected into the lubrication grooves from the nozzles by gravity and pump pressure, avoiding oil waste. The oil drain seat is located at the bottom of the machine frame and is used to collect waste oil and discharge it through the drain pipe.

[0015] Preferably, a cooling coil is fixedly connected to the top outer wall of the oil injection head, and an oil drain pipe is fixedly connected to the bottom outer wall of the oil drain seat. A pump housing is fixedly connected between the cooling coil and the oil drain pipe, and the pump housing is located at the bottom of the machine frame. An oil inlet is provided on one side of the outer wall of the pump housing, and the cooling coil is welded to the inner wall of the oil inlet. An oil drain port is opened on the top outer wall of the pump housing, and the oil drain pipe is welded to the inner wall of the oil drain port.

[0016] By adopting the above technical solution, the cooling coil and the oil drain pipe are connected through the pump casing. The oil inlet of the pump casing is welded to the cooling coil, and the oil outlet of the pump casing is welded to the oil drain pipe, forming a closed oil circuit.

[0017] Preferably, an impeller is provided inside the pump casing, and a first connecting rod is welded to one side of the outer wall of the impeller. The first connecting rod is rotatably connected to one side of the outer wall of the pump casing.

[0018] By adopting the above technical solution, the impeller is located inside the pump casing, and the rotation of the impeller is driven by a gear set consisting of the main shaft, the first gear, the second gear, and the third gear, to achieve pressurized circulation of oil.

[0019] Preferably, a first gear is fixedly connected to the outer wall of the end of the first connecting rod away from the pump housing, and a second gear meshes on the outer wall of the first gear, and a third gear meshes on the outer wall of the second gear, wherein the first gear is located below the second gear and the third gear is located above the second gear.

[0020] By adopting the above technical solution, the impeller is connected to the first gear via the first connecting rod. The third gear on the main shaft meshes with the second gear, transmitting power to the impeller. The gear set adopts a three-stage gear design to ensure that the impeller speed matches the oil pump requirements.

[0021] The main shaft, through the meshing of the third gear, the second gear, and the first gear, can drive the impeller to rotate, thereby pumping the cooling oil from the oil drain pipe to the cooling coil, realizing the autonomous circulation of the cooling oil. This linkage structure does not require an external power source and can directly use the kinetic energy of the motor shaft to drive the oil pump composed of the impeller and pump housing, reducing energy consumption and space occupation. The cooling coil can further dissipate heat from the oil, ensuring stable circulating oil temperature and extending the service life of the oil.

[0022] Preferably, a stator core is provided on the inner wall of the motor stator, and a motor rotor is provided on the inner wall of the stator core. A main shaft is fixedly connected to the inner wall of the motor rotor, and a third gear is fixedly connected to the outer wall of the main shaft. The third gear is located outside one end of the frame.

[0023] By adopting the above technical solution, the stator core and the motor rotor are coaxially arranged through the main shaft.

[0024] Preferably, the outer walls at both ends of the frame are provided with end caps, and an end cap is fixedly connected to one side of the outer wall of the end cap by bolts.

[0025] Preferably, the end head is provided with an oil seal ring and a sealing bearing respectively. The main shaft is disposed through the outer walls of both ends of the frame and is tightly attached to the inner wall of the oil seal ring. The main shaft is fixedly connected to the inner wall of the inner ring of the sealing bearing.

[0026] By adopting the above technical solution, the end cap is fixed by bolts. The oil seal ring and sealing bearing inside the end cap can provide double sealing for the cooling oil, preventing oil from seeping into the outside of the motor.

[0027] Preferably, a second connecting rod is fixedly connected to the inner wall of the second gear, and the outer wall of the end of the second connecting rod away from the second gear is rotatably connected to the outer wall of the frame through a bearing.

[0028] By adopting the above technical solution, the second connecting rod fixes the second gear to the outer wall of the frame, ensuring the meshing stability of the gear set composed of the first gear, the second gear and the third gear; the whole system can be independently integrated as a module into various motors, improving versatility.

[0029] The integrated design of the oil filling head, oil injection nozzle and oil drain seat simplifies the oil circuit layout. The built-in oil seal ring and sealing bearing at the end can prevent oil leakage and improve the system's sealing performance. The modular structure facilitates installation and maintenance and can be adapted to motors of different power levels, with broad application prospects.

[0030] An electric motor includes a stator end oil cooling system with alternating distribution of multiple types of nozzles as described above.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The stator end oil cooling heat dissipation system and motor of the present invention with alternating distribution of multiple types of spray holes, the alternating distribution of annular lubrication grooves and transverse oil holes forms a multi-directional oil flow path, which expands the contact area between the cooling oil and the outer surface of the motor stator. The T-shaped bars can prolong the residence time of the oil through the turbulence effect, enhance heat conduction, and the vertical opening design of the inner layer oil inlet spray hole and the inner layer oil outlet hole of the rotor realizes the coordinated heat dissipation of the motor stator and the motor rotor, avoiding local overheating. This structure can enable the oil to form a three-dimensional heat dissipation network on the outer surface of the motor stator, improving the overall heat dissipation efficiency.

[0033] 2. The stator end oil cooling system and motor of the present invention, which features alternating distribution of multiple types of nozzles, enable the main shaft to drive the impeller to rotate through the meshing of the third gear, the second gear and the first gear, thereby pumping the cooling oil from the oil drain pipe to the cooling coil, realizing the autonomous circulation of the cooling oil. This linkage structure does not require an external power source and can directly use the kinetic energy of the motor main shaft to drive the oil pump composed of the impeller and the pump housing, reducing energy consumption and space occupation. The cooling coil can further dissipate heat from the oil, ensuring stable circulating oil temperature and extending the service life of the oil.

[0034] 3. The stator end oil cooling heat dissipation system and motor of the present invention with alternating distribution of multiple types of nozzles, the integrated design of oil injection head, oil injection nozzle and oil drain seat simplifies the oil circuit layout, the end has built-in oil seal ring and sealing bearing, which can avoid oil leakage and improve the system sealing performance, the modular structure is easy to install and maintain, can be adapted to motors of different power levels, and has a wide range of application prospects. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of a stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles and a motor proposed in this invention;

[0036] Figure 2 This is a schematic diagram of a stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles and the internal connection structure of the motor frame proposed in this invention.

[0037] Figure 3 This invention presents a stator end oil cooling system with alternating distribution of multiple types of nozzles, and a schematic diagram of the motor stator, oil injection head, and oil drain seat structure. Figure 1 ;

[0038] Figure 4 This invention presents a stator end oil cooling system with alternating distribution of multiple types of nozzles, and a schematic diagram of the motor stator, oil injection head, and oil drain seat structure. Figure 2 ;

[0039] Figure 5This is a schematic diagram of a stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles and a motor stator connection structure proposed in this invention.

[0040] Figure 6 This is a schematic diagram showing the internal structure of the stator end oil cooling system with alternating distribution of multiple types of nozzles and the motor frame proposed in this invention.

[0041] Explanation of reference numerals in the attached drawings: 1. Machine frame; 2. Motor stator; 3. Annular lubrication groove; 4. T-bar; 5. Horizontal connecting oil hole; 6. Rotor inner layer oil inlet spray hole; 7. Rotor inner layer oil outlet hole; 8. Oil injection head; 9. Oil injection spray hole; 10. Oil drain seat; 11. Cooling coil; 12. Oil drain pipe; 13. Pump casing; 14. Impeller; 15. First connecting rod; 16. First gear; 17. Second gear; 18. Third gear; 19. Main shaft; 20. Stator core; 21. End; 22. Motor rotor; 23. Oil seal ring; 24. Sealed bearing; 25. End cover; 26. Second connecting rod. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0043] Reference Figure 1-6 Example 1: A stator end oil cooling system with alternating distribution of multiple types of nozzles. The system includes a frame 1, inside which a motor stator 2 is installed. The outer wall of the motor stator 2 has equidistantly distributed annular lubrication grooves 3. Equidistantly distributed T-shaped strips 4 are fixedly connected to the inner wall of each annular lubrication groove 3. Equidistantly distributed transverse oil holes 5 are provided between every two annular lubrication grooves 3. Rotor inner layer oil inlet nozzles 6 are provided on the inner wall of each annular lubrication groove 3. Rotor inner layer oil outlet nozzles 7 are provided around the periphery of both outer walls of the motor stator 2. The opening directions of the rotor inner layer oil inlet nozzles 6 and the transverse oil holes 5, as well as the opening directions of the rotor inner layer oil inlet nozzles 6 and the transverse oil holes 5, are perpendicular to each other.

[0044] The annular lubrication grooves 3 on the outer wall of the motor stator 2 are evenly distributed, and T-shaped strips 4 are welded inside the grooves to enhance oil turbulence. A transverse oil hole 5 is opened between every two lubrication grooves. The axis of the transverse oil hole 5 is perpendicular to the oil inlet spray hole 6 in the inner layer of the rotor, forming a cross oil path. This design allows the oil to be injected vertically into the end of the motor stator 2 from the oil inlet spray hole 6 in the inner layer of the rotor, and then diffused laterally through the transverse oil hole 5, covering a larger heat dissipation area.

[0045] The implementation principle of this application embodiment is as follows: the alternating distribution of the annular lubrication groove 3 and the transverse oil hole 5 forms a multi-directional oil flow path, which expands the contact area between the cooling oil and the outer surface of the motor stator 2. The T-shaped bar 4 can prolong the residence time of the oil through the turbulence effect, enhance heat conduction, and the vertical opening design of the rotor inner layer oil inlet spray hole 6 and the rotor inner layer oil outlet hole 7 realizes the coordinated heat dissipation of the motor stator 2 and the motor rotor 22, avoiding local overheating. This structure can enable the oil to form a three-dimensional heat dissipation network on the outer surface of the motor stator 2, thereby improving the overall heat dissipation efficiency.

[0046] Example 2: A stator end oil cooling system with alternating distribution of multiple types of nozzles. An oil injection head 8 is welded to the inner top wall of the frame 1, and an oil injection nozzle 9 is formed on the outer bottom wall of the oil injection head 8. Each oil injection nozzle 9 corresponds to a one-to-one annular lubrication groove 3, and the nozzle 9 is located at the top of the annular lubrication groove 3. An oil drain seat 10 is welded to the inner bottom wall of the frame 1. A cooling coil 11 is fixedly connected to the outer top wall of the oil injection head 8, and an oil drain pipe 12 is fixedly connected to the outer bottom wall of the oil drain seat 10. A pump housing 13 is fixedly connected between the cooling coil 11 and the oil drain pipe 12, and the pump housing 13 is located at the bottom of the frame 1. An oil inlet is provided on one side of the outer wall of the pump housing 13, and the cooling coil 11 is welded to the inner wall of the oil inlet. An oil drain port is formed on the outer top wall of the pump housing 13. The oil drain pipe 12 is welded to the inner wall of the oil drain port. An impeller 14 is provided inside the pump housing 13, and a first connecting rod 15 is welded to the outer wall of one side of the impeller 14. The first connecting rod 15 is rotatably connected to the outer wall of one side of the pump housing 13. A first gear 16 is fixedly connected to the outer wall of the end of the first connecting rod 15 away from the pump housing 13, and a second gear 17 meshes on the outer wall of the first gear 16. A third gear 18 meshes on the outer wall of the second gear 17. The first gear 16 is located below the second gear 17, and the third gear 18 is located above the second gear 17. A second connecting rod 26 is fixedly connected to the inner wall of the second gear 17, and the outer wall of the end of the second connecting rod 26 away from the second gear 17 is rotatably connected to the outer wall of the frame 1 through a bearing.

[0047] The oil injection head 8 is welded to the top of the frame 1, and its oil injection nozzle 9 corresponds one-to-one with the annular lubrication groove 3. Oil is precisely injected into the annular lubrication groove 3 from the oil injection nozzle 9 by gravity and pump pressure, avoiding oil waste. The oil drain seat 10 is located at the bottom of the frame 1 and is used to collect waste oil and discharge it through the oil drain pipe 12.

[0048] The cooling coil 11 and the oil drain pipe 12 are connected via the pump housing 13. The oil inlet of the pump housing 13 is welded to the cooling coil 11, and the oil outlet of the pump housing 13 is welded to the oil drain pipe 12, forming a closed oil circuit. The impeller 14 is located inside the pump housing 13, and the rotation of the impeller 14 is driven by the main shaft 19 via a gear set consisting of the first gear 16, the second gear 17, and the third gear 18, thereby achieving pressurized oil circulation.

[0049] Impeller 14 is connected to first gear 16 via first connecting rod 15. Third gear 18 of main shaft 19 meshes with second gear 17, transmitting power to impeller 14. The gear set adopts a three-stage gear design to ensure that the speed of impeller 14 matches the requirements of oil pump.

[0050] The implementation principle of this application embodiment is as follows: the main shaft 19, through the meshing of the third gear 18, the second gear 17 and the first gear 16, can drive the impeller 14 to rotate, thereby pumping the cooling oil from the oil drain pipe 12 to the cooling coil 11, realizing the autonomous circulation of the cooling oil. This linkage structure does not require an external power source and can directly use the kinetic energy of the motor main shaft 19 to drive the oil pump composed of the impeller 14 and the pump housing 13, reducing energy consumption and space occupation. The cooling coil 11 can further dissipate heat from the oil, ensuring stable circulating oil temperature and extending the service life of the oil.

[0051] Example 3: A stator end oil cooling system with alternating distribution of multiple types of nozzles. The stator 2 of the motor is provided with a stator core 20 on the inner wall, and a motor rotor 22 is provided on the inner wall of the stator core 20. A main shaft 19 is fixedly connected to the inner wall of the motor rotor 22, and a third gear 18 is fixedly connected to the outer wall of the main shaft 19. The third gear 18 is located outside one end of the frame 1. Both ends of the frame 1 are provided with end heads 21. An end cap 25 is fixedly connected to one side of the outer wall of the end head 21 by bolts. An oil seal ring 23 and a sealing bearing 24 are respectively provided inside the end head 21. The main shaft 19 is provided through the two ends of the frame 1 and is close to the inner wall of the oil seal ring 23. The main shaft 19 is fixedly connected to the inner wall of the inner ring of the sealing bearing 24.

[0052] The stator core 20 and the motor rotor 22 are coaxially mounted via the main shaft 19. The end cap 25 is fixed to the end cap 21 by bolts. The oil seal ring 23 and the sealed bearing 24 inside the end cap 25 can provide a double seal for the cooling oil, preventing oil from seeping into the outside of the motor.

[0053] The second connecting rod 26 fixes the second gear 17 to the outer wall of the frame 1, ensuring the meshing stability of the gear set composed of the first gear 16, the second gear 17 and the third gear 18; the whole system can be independently integrated as a module into various motors, improving versatility.

[0054] The implementation principle of this application embodiment is as follows: the integrated design of the oil injection head 8, the oil injection nozzle 9 and the oil drain seat 10 simplifies the oil circuit layout. The end 21 has an internal oil seal ring 23 and a sealing bearing 24, which can prevent oil leakage and improve the system sealing performance. The modular structure is easy to install and maintain, and can be adapted to motors of different power levels, and has a wide range of application prospects.

[0055] An electric motor includes a stator end oil cooling system with alternating distribution of multiple types of nozzles as described above.

[0056] Working principle:

[0057] Oil injection and initial heat dissipation: Cooling oil is injected into the annular lubrication groove 3 through the oil injection nozzle 9 of the oil injection head 8. Under the turbulence of the T-shaped bar 4, it is evenly distributed on the outer surface of the motor stator 2, absorbing the heat generated by the stator core 20 and the motor rotor 22.

[0058] Oil circulation drive: When the motor main shaft 19 rotates, the third gear 18 can drive the second gear 17 and the first gear 16 to rotate, thereby driving the impeller 14 to rotate. The impeller 14 draws the high-temperature oil from the oil drain seat 10 into the cooling coil 11, and after being cooled by heat dissipation, it is pumped back into the oil injection head 8 to form a closed loop circulation.

[0059] Multi-path coordinated heat dissipation: The oil flows laterally through the transverse oil holes 5, and is simultaneously sprayed vertically onto the inner surface of the motor stator 2 through the inner layer oil inlet nozzles 6, achieving synchronous cooling of the motor stator 2 and the motor rotor 22. The inner layer oil outlet holes 7 of the rotor can guide waste oil back to the oil drain seat 10 to avoid oil stagnation.

[0060] Sealing and stability assurance: The oil seal ring 23 and the sealing bearing 24 of the end 21 prevent oil leakage. The gear set consisting of the first gear 16, the second gear 17 and the third gear 18 is rigidly fixed to the first connecting rod 15 and the second connecting rod 26 to ensure transmission efficiency.

[0061] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles, comprising a frame (1), characterized in that, The frame (1) is provided with a motor stator (2), and the outer wall of the motor stator (2) is provided with annular lubrication grooves (3) distributed at equal intervals. T-shaped strips (4) are fixedly connected to the inner wall of the annular lubrication grooves (3). A transverse oil hole (5) is provided between every two annular lubrication grooves (3). The inner wall of the annular lubrication grooves (3) is provided with rotor inner layer oil inlet spray hole (6), and the outer walls on both sides of the motor stator (2) are provided with rotor inner layer oil outlet hole (7). The opening direction of the rotor inner layer oil inlet spray hole (6) and the transverse oil hole (5) and the opening direction of the rotor inner layer oil inlet spray hole (6) and the rotor inner layer oil outlet hole (7) are perpendicular to each other. The inner wall of the top of the frame (1) is welded with an oil injection head (8), and the outer wall of the bottom of the oil injection head (8) is provided with an oil injection nozzle (9). The oil injection nozzle (9) corresponds one-to-one with the annular lubrication groove (3), and the oil injection nozzle (9) is located at the top of the annular lubrication groove (3). The inner wall of the bottom of the frame (1) is welded with an oil drain seat (10). The top outer wall of the oil injection head (8) is fixedly connected to a cooling coil (11), and the bottom outer wall of the oil drain seat (10) is fixedly connected to an oil drain pipe (12). A pump housing (13) is fixedly connected between the cooling coil (11) and the oil drain pipe (12), and the pump housing (13) is located at the bottom of the frame (1). An oil inlet is provided on one side of the outer wall of the pump housing (13), and the cooling coil (11) is welded to the inner wall of the oil inlet. An oil drain is provided on the top outer wall of the pump housing (13), and the oil drain pipe (12) is welded to the inner wall of the oil drain.

2. The stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles according to claim 1, characterized in that, An impeller (14) is provided inside the pump casing (13), and a first connecting rod (15) is welded to one side of the outer wall of the impeller (14). The first connecting rod (15) is rotatably connected to one side of the outer wall of the pump casing (13).

3. The stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles according to claim 2, characterized in that, The first connecting rod (15) is fixedly connected to the outer wall of the end away from the pump housing (13) with a first gear (16), and a second gear (17) meshes on the outer wall of the first gear (16), and a third gear (18) meshes on the outer wall of the second gear (17). The first gear (16) is located below the second gear (17), and the third gear (18) is located above the second gear (17).

4. The stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles according to claim 3, characterized in that, The inner wall of the motor stator (2) is provided with a stator core (20), and the inner wall of the stator core (20) is provided with a motor rotor (22). The inner wall of the motor rotor (22) is fixedly connected with a main shaft (19), and a third gear (18) is fixedly connected to the outer wall of the main shaft (19). The third gear (18) is located outside one end of the frame (1).

5. The stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles according to claim 4, characterized in that, The machine frame (1) has end caps (21) on both ends of its outer wall, and an end cap (25) is fixedly connected to one side of the outer wall of the end cap (21) by bolts.

6. The stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles according to claim 5, characterized in that, The end (21) is provided with an oil seal ring (23) and a sealing bearing (24) respectively. The main shaft (19) is installed through the outer walls of both ends of the frame (1), and the main shaft (19) is tightly attached to the inner wall of the oil seal ring (23). The main shaft (19) is fixedly connected to the inner wall of the inner ring of the sealing bearing (24).

7. The stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles according to claim 6, characterized in that, A second connecting rod (26) is fixedly connected to the inner wall of the second gear (17), and the outer wall of the end of the second connecting rod (26) away from the second gear (17) is rotatably connected to the outer wall of the frame (1) through a bearing.

8. An electric motor, characterized in that: Including the stator end oil cooling heat dissipation system with alternating distribution of multiple types of nozzles as described in any one of claims 1-7.

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