Axial flux permanent magnet motor stator oil immersion cooling device
By setting a semi-circular annular cooling oil flow channel and an arc-shaped protrusion inside the stator of the axial flux permanent magnet motor, the problem of poor cooling oil flow is solved, achieving efficient stator heat dissipation and ensuring the safe and reliable operation of the motor.
Patent Information
- Application Number
- CN202422342291.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-09-25
AI Technical Summary
In the prior art, the cooling oil in the stator cavity of the axial flux permanent magnet motor has poor fluidity, resulting in local high temperature and low heat dissipation efficiency, which affects the motor's operating efficiency and lifespan.
An axial flux permanent magnet motor stator oil immersion cooling device was designed. By setting semi-circular cooling oil channels on the oil inlet end cover and the oil outlet end cover, and setting an oil distribution port on the sealing plate, the cooling oil enters the cooling oil channel between the stator outer shell and the inner shell along the axial direction. Combined with the arc-shaped protrusion and the cuboid channel on the inner wall of the stator, the cooling oil is ensured to flow fully between the stator core and the winding.
It improves the fluidity of the cooling oil, reduces the temperature difference in the stator cavity, enhances heat dissipation efficiency, simplifies the structural design, and ensures the long-term safe and reliable operation of the motor.
Smart Images
Figure CN223462813U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor cooling technical field especially a kind of axial flux permanent magnet motor stator oil immersion cooling device. BACKGROUND
[0002] With the development of new energy vehicles, robots and high-precision numerical control machine tools and other national key support projects, higher requirements are put forward for the performance indicators of motor, such as efficiency, power density, response speed and vibration noise, prompting the motor to develop towards high precision, high power density, miniaturization, light weight and mechatronics, and these requirements have led to the emergence of problems such as a substantial increase in heat generation inside the motor and a more narrow effective heat dissipation space. Therefore, using an efficient heat dissipation system is the key to improving the efficiency, stability and reliability of the motor.
[0003] For the stator part of the permanent magnet motor, if the number of slots in the stator cavity is too large, the cooling oil in the stator cavity will not flow sufficiently in some areas, resulting in flow dead zones and causing local high temperatures in the stator winding and stator core. Excessive internal temperature rise of the motor not only shortens the service life of the internal insulation material of the motor, but also reduces the operating efficiency of the motor, affecting the service life and safety of the motor.
[0004] The motor usually adopts natural cooling, air cooling and liquid cooling for heat dissipation.
[0005] Natural cooling relies on the rotation of the rotor to drive the internal air gap to flow and form convective heat transfer, as well as convective heat transfer of the air outside the housing. However, due to the low thermal conductivity of the air inside the motor and the extremely narrow internal space, the heat transfer path is limited and the heat transfer efficiency is low. Therefore, it is only suitable for small power motors with low rotor temperature rise, and the working conditions of the motor are limited.
[0006] Air cooling is divided into two forms: closed and open. Closed air cooling can only enhance the convective heat transfer capacity of the external housing and cannot directly remove the internal heat generated by the stator core and winding, resulting in low heat dissipation efficiency. Although open air cooling can directly cool the main heat source of the motor, it will also bring dust particles from the outside into the motor, increasing the maintenance cost.
[0007] Liquid cooling is divided into two forms: water cooling and oil cooling. Water cooling adds a water channel inside the housing to use flowing water to remove the heat of the housing. Although this method can effectively control the overall temperature rise of the motor, the heat dissipation efficiency is still lower than that of oil cooling, which can directly contact the stator components. Oil cooling uses cooling oil to circulate through the internal motor to remove the heat inside the motor. However, when the oil inlet position, oil quantity and stator slot number change, the flowability of the local cooling oil flow in the stator slot will be poor, causing local high temperature and failing to achieve the desired heat dissipation effect.
[0008] In view of the above, it is urgent for those skilled in the art to study an efficient cooling method for the oil circuit in the stator cavity of the axial flux permanent magnet motor. Content of the utility model
[0009] The utility model aims at providing an axial flux permanent magnet motor stator cooling device which has strong oil flow, high heat dissipation efficiency, simple structure and high reliability.
[0010] The technical solution for achieving the utility model is as follows: an axial flux permanent magnet motor stator oil immersion cooling device, comprising an oil inlet side end cover, an oil jacket, an oil inlet side sealing plate, a stator outer shell, a stator inner shell, an oil outlet side sealing plate, an oil outlet side end cover, an oil pump, cooling oil and an oil storage tank.
[0011] The oil inlet side end cover and the oil outlet side end cover are disc structures with one end open; the oil jacket is a circular ring structure, is embedded and installed on the inner side of the oil inlet side end cover, the outer ring surface is connected with the inner wall of the oil inlet side end cover, and the side surface is installed with the oil inlet side sealing plate; the oil outlet side end cover is installed with the oil outlet side sealing plate on the side surface; the stator outer shell and the stator inner shell are arranged between the oil inlet side sealing plate and the oil outlet side sealing plate, and the stator core and the stator winding are installed in the cavity between the stator outer shell and the stator inner shell.
[0012] An oil inlet is arranged on the oil inlet side end cover, a semicircular ring-shaped cooling oil flow channel is arranged on the oil jacket, first, second and third oil distribution ports are arranged on the oil inlet side sealing plate, an oil outlet port of the oil outlet side sealing plate is arranged on the oil outlet side sealing plate, and an oil outlet port of the oil outlet side end cover is arranged on the oil outlet side end cover.
[0013] The cooling oil is pumped out from the oil storage tank through the oil pump, is transported to the oil inlet through the oil pipe, is sent into the first, second and third oil distribution ports through the semicircular ring-shaped cooling oil flow channel, and then flows into the cooling oil flow channel between the stator outer shell and the stator inner shell in the axial direction, so that the cooling oil fully flows between the stator core and the stator winding, carries away the heat generated by the stator core and the stator winding, flows back to the oil storage tank through the oil outlet port of the oil outlet side sealing plate and the oil outlet port of the oil outlet side end cover connected therewith, and the stator oil immersion cooling process is completed.
[0014] As a specific example, the oil jacket is provided with a semicircular ring-shaped cooling oil flow channel, one end of the semicircular ring-shaped cooling oil flow channel is an open end connected with the oil inlet on the oil inlet side end cover, and the other end is a closed end.
[0015] As a specific example, the oil inlet of the oil inlet side end cover and the oil outlet port of the oil outlet side end cover on the oil outlet side end cover form an angle of 90° in the axial direction.
[0016] As a specific example, the inner diameter of the stator shell is greater than the outer diameter of the stator, the outer diameter of the stator inner shell is less than the inner diameter of the stator, and the axial length of the stator shell and the stator inner shell is the same; the stator shell is mounted on the periphery of the stator, the stator inner shell is mounted at the center of the stator, and the stator shell and the stator inner shell are mounted into the oil inlet side sealing plate and the oil outlet side sealing plate to seal the stator between the stator shell and the stator inner shell and form a sealed cooling oil flow channel.
[0017] As a specific example, the first oil distribution port, the second oil distribution port and the third oil distribution port are respectively arranged at the opening end position, the middle position and the closed end position of the semi-circular annular cooling oil flow channel on the oil inlet side sealing plate, and are used to send cooling oil into the cooling oil flow channel along the axial direction; the first oil distribution port, the second oil distribution port and the third oil distribution port are symmetrically arranged with an axis difference of 90°.
[0018] As a specific example, the areas of the first oil distribution port, the second oil distribution port and the third oil distribution port are arranged from small to large to ensure that the oil inlet amounts of the first oil distribution port, the second oil distribution port and the third oil distribution port are relatively uniform.
[0019] As a specific example, the inner wall of the stator shell and the outer wall of the stator inner shell are respectively and uniformly provided with eight stator shell arc protrusions and stator inner shell arc protrusions, and the stator shell arc protrusions and the stator inner shell arc protrusions are integrated with the stator shell and the stator inner shell.
[0020] As a specific example, the stator core is provided with a cuboid flow channel at the bottom of each slot on both sides, which is used to increase the flow path of the cooling oil in the stator core and improve the cooling efficiency.
[0021] As a specific example, the cuboid flow channel is in communication with the cooling oil flow channel.
[0022] As a specific example, the oil inlet side end cover, the stator shell, the stator inner shell and the oil outlet side end cover are all made of aluminum alloy material.
[0023] Compared with the prior art, the significant advantages of the utility model lie in that (1) the oil inlet of the motor stator part is realized by opening the semicircular annular flow channel in the oil jacket connected with the end cover and the oil distribution port in the sealing plate connected with the flow channel below, the radial oil inlet is avoided, and the motor outer diameter profile space is saved; (2) the arc-shaped protrusion is arranged on the inner wall of the casing to realize the sufficient flow of the cooling oil in the stator slot, the problem of poor flowability of the cooling oil in the stator slot part area is solved, the temperature difference in the stator cavity is reduced, and the heat dissipation efficiency is improved; (3) the casing is provided with the arc-shaped protrusion, the flow guide can be better performed, and the end winding is not damaged, the stator internal structure design is simplified, and the manufacturing process complexity is reduced; (4) the position, opening area and quantity of the sealing plate oil distribution port can be adjusted according to actual needs, the quantity and distribution position of the arc-shaped protrusion of the casing can be changed according to actual conditions, the system is strong in adjustability, the cooling efficiency is high, the local high temperature phenomenon of the stator part is effectively solved, and the long-term safe and reliable operation of the motor is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a structure schematic view of the utility model kind of axial flux permanent magnet motor stator oil immersion cooling device.
[0025] Figure 2 It is the explosion structure drawing of the utility model embodiment kind of axial flux permanent magnet motor stator oil immersion cooling device.
[0026] Figure 3 It is the structure schematic view of the oil inlet side end cover in the utility model embodiment.
[0027] Figure 4 It is the structure schematic view of the oil jacket in the utility model embodiment.
[0028] Figure 5 It is the structure schematic view of the oil inlet side sealing plate in the utility model embodiment.
[0029] Figure 6 It is the structure schematic view of the stator core in the utility model embodiment.
[0030] Figure 7 It is the structure schematic view of the stator outer shell and stator inner shell in the utility model embodiment.
[0031] Figure 8 It is the structure schematic view of the oil outlet side sealing plate in the utility model embodiment.
[0032] Figure 9 It is the structure schematic view of the oil outlet side end cover in the utility model embodiment.
[0033] Figure 10 It is the structure schematic view of the oil inlet side end cover and oil inlet side sealing plate in the utility model embodiment.
[0034] Figure 11 Figure 1 is a schematic diagram of the overall structure of the axial flux permanent magnet motor stator oil immersion cooling device according to an embodiment of the present application.
[0035] Figure 12 Figure 2 is a schematic diagram of the flow direction of the cooling oil in the cooling oil flow channel according to an embodiment of the present application. DETAILED DESCRIPTION
[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.
[0037] The purpose of the present application is to provide an axial flux permanent magnet motor stator oil immersion cooling structure to solve the problems existing in the prior art.
[0038] In combination with Figures 1-12 The axial flux permanent magnet motor stator oil immersion cooling device according to the present application comprises an oil inlet side end cover 1, an oil jacket 2, an oil inlet side sealing plate 3, a stator outer shell 5, a stator inner shell 5-1, an oil outlet side sealing plate 6, an oil outlet side end cover 7, an oil pump 8, cooling oil 9, and an oil storage 10.
[0039] The oil inlet side end cover 1 and the oil outlet side end cover 7 are disc structures with one end open; the oil jacket 2 is a circular ring structure, is embedded and installed inside the oil inlet side end cover 1, the outer ring surface is in contact with the inner wall of the oil inlet side end cover 1, and the side surface is installed with the oil inlet side sealing plate 3; the oil outlet side end cover 7 is installed with the oil outlet side sealing plate 6 on the side surface; the stator outer shell 5 and the stator inner shell 5-1 are arranged between the oil inlet side sealing plate 3 and the oil outlet side sealing plate 6, and the stator core 4 and the stator winding 12 are installed in the cavity between the stator outer shell 5 and the stator inner shell 5-1.
[0040] An oil inlet 1-1 is arranged on the oil inlet side end cover 1, a semicircular ring-shaped cooling oil flow channel 2-2 is arranged on the oil jacket 2, a first oil distribution port 3-1, a second oil distribution port 3-2, and a third oil distribution port 3-3 are arranged on the oil inlet side sealing plate 3, an oil outlet side sealing plate oil outlet 6-1 is arranged on the oil outlet side sealing plate 6, and an oil outlet side end cover oil outlet 7-1 is arranged on the oil outlet side end cover 7.
[0041] The cooling oil 9 is pumped out from the oil storage 10 through the oil pump 8, delivered to the oil inlet 1-1 through the oil pipe, and sent into the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 through the semicircular annular cooling oil flow channel 2-2, so as to enter the cooling oil flow channel 11 between the stator outer shell 5 and the stator inner shell 5-1 in the axial direction, so that the cooling oil 9 fully flows between the stator core 4 and the stator winding 12, carries away the heat generated by the stator core 4 and the stator winding 12, and flows back to the oil storage 10 through the oil outlet 6-1 of the oil outlet side sealing plate and the oil outlet 7-1 of the oil outlet side end cover connected thereto, thereby completing the oil immersion cooling process of the stator.
[0042] As a specific example, the oil jacket 2 is provided with a semicircular annular cooling oil flow channel 2-2, one end of which is an open end 2-1 connected with the oil inlet 1-1 on the oil inlet side end cover 1, and the other end is a closed end 2-3.
[0043] As a specific example, the angle between the oil inlet 1-1 of the oil inlet side end cover 1 and the oil outlet side end cover oil outlet 7-1 on the oil outlet side end cover 7 in the axial direction is 90°.
[0044] As a specific example, the inner diameter of the stator outer shell 5 is greater than the outer diameter of the stator, the outer diameter of the stator inner shell 5-1 is smaller than the inner diameter of the stator, and the axial length of the stator outer shell 5 and the stator inner shell 5-1 is the same; the stator outer shell 5 is installed on the periphery of the stator, and the stator inner shell 5-1 is installed at the center of the stator; the stator outer shell 5 and the stator inner shell 5-1 are installed at both ends of the oil inlet side sealing plate 3 and the oil outlet side sealing plate 6, so as to seal the stator between the stator outer shell 5 and the stator inner shell 5-1, forming a sealed cooling oil flow channel 11.
[0045] As a specific example, the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are respectively provided on the oil inlet side sealing plate 3 corresponding to the open end 2-1 position, the middle position and the closed end 2-3 position of the semicircular annular cooling oil flow channel 2-2, for sending the cooling oil 9 into the cooling oil flow channel 11 in the axial direction; the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are symmetrical with an axis difference of 90°.
[0046] As a specific example, the areas of the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are arranged from small to large, so as to ensure that the oil inlet amounts of the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are relatively uniform.
[0047] As a specific example, eight stator shell arc protrusions 5-2 and stator inner shell arc protrusions 5-3 are evenly arranged on the inner wall of the stator shell 5 and the outer wall of the stator inner shell 5-1, respectively, and the stator shell arc protrusions 5-2 and the stator inner shell arc protrusions 5-3 are integrated with the stator shell 5 and the stator inner shell 5-1.
[0048] As a specific example, a rectangular flow channel 4-2 is arranged on the bottom of each slot of the stator core 4, so as to increase the flow path of the cooling oil 9 in the stator core 4 and improve the cooling efficiency.
[0049] As a specific example, the rectangular flow channel 4-2 is connected with the cooling oil flow channel 11.
[0050] As a specific example, the oil inlet side end cover 1, the stator shell 5, the stator inner shell 5-1 and the oil outlet side end cover 7 are made of aluminum alloy material.
[0051] In order to make the above-mentioned purposes, characteristics and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below in combination with the drawings and specific embodiments. Embodiment
[0052] As shown in Figure 1 , Figure 2 The utility model discloses an axial flux permanent magnet motor stator oil immersion cooling device, including oil inlet side end cover 1, oil jacket 2, oil inlet side sealing plate 3, stator shell 5, stator inner shell 5-1, oil outlet side sealing plate 6, oil outlet side end cover 7, oil pump 8, cooling oil 9 and oil storage 10;
[0053] The oil inlet side end cover 1 and the oil outlet side end cover 7 are the disc structure of one end open, as shown in Figure 10 The oil jacket 2 is the circular ring structure, is embedded and is installed in the inboard of oil inlet side end cover 1, and the outer ring surface is connected with the inner wall of oil inlet side end cover 1, and the side surface installs oil inlet side sealing plate 3, as shown in Figure 11 The oil outlet side end cover 7 side surface installs oil outlet side sealing plate 6, and the oil inlet side sealing plate 3 and the oil outlet side sealing plate 6 are provided with stator shell 5 and stator inner shell 5-1, and the cavity between stator shell 5 and stator inner shell 5-1 installs stator core 4 and stator winding 12;
[0054] As shown in Figure 3 The oil inlet side end cover 1 is provided with oil inlet 1-1, as shown in Figure 4 The oil jacket 2 is provided with semicircular ring cooling oil flow channel 2-2, as shown in Figure 5 The oil inlet side sealing plate 3 is provided with first oil distribution port 3-1, second oil distribution port 3-2 and third oil distribution port 3-3, as shown in Figure 8 The oil outlet side sealing plate 6 is provided with oil outlet side sealing plate oil outlet 6-1, as shown inFigure 9 As shown in the drawings, the oil outlet side end cover 7 is provided with an oil outlet side end cover oil outlet 7-1.
[0055] The cooling oil 9 is pumped from the oil reservoir 10 through the oil pump 8, delivered to the oil inlet 1-1 through the oil pipe, and sent into the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 through the semicircular annular cooling oil flow channel 2-2, so as to enter the cooling oil flow channel 11 between the stator housing 5 and the stator inner housing 5-1 in the axial direction, so that the cooling oil 9 fully flows between the stator core 4 and the stator winding 12, carries away the heat generated by the stator core 4 and the stator winding 12, and flows back to the oil reservoir 10 through the oil outlet side sealing plate oil outlet 6-1 and the oil outlet side end cover oil outlet 7-1 connected thereto, thereby completing the oil immersion cooling process of the stator.
[0056] As a specific example, as shown in the drawings, the oil jacket 2 is provided with a semicircular annular cooling oil flow channel 2-2, one end of which is an open end 2-1 connected to the oil inlet 1-1 on the oil inlet side end cover 1, and the other end is a closed end 2-3. Figure 3 Figure 4 As a specific example, as shown in the drawings, the oil inlet 1-1 of the oil inlet side end cover 1 and the oil outlet side end cover oil outlet 7-1 on the oil outlet side end cover 7 form an angle of 90° in the axial direction.
[0057] As a specific example, as shown in the drawings, the inner diameter of the stator housing 5 is greater than the outer diameter of the stator, the outer diameter of the stator inner housing 5-1 is smaller than the inner diameter of the stator, and the axial length of the stator housing 5 and the stator inner housing 5-1 is the same; the stator housing 5 is installed on the periphery of the stator, the stator inner housing 5-1 is installed at the center of the stator, and the two ends of the stator housing 5 and the stator inner housing 5-1 are installed into the oil inlet side sealing plate 3 and the oil outlet side sealing plate 6, thereby sealing the stator between the stator housing 5 and the stator inner housing 5-1 to form a sealed cooling oil flow channel 11. Figure 2 As a specific example, the oil inlet side sealing plate 3 is provided with a first oil distribution port 3-1, a second oil distribution port 3-2 and a third oil distribution port 3-3 corresponding to the open end 2-1 position, the middle position and the closed end 2-3 position of the semicircular annular cooling oil flow channel 2-2, respectively, for sending the cooling oil 9 into the cooling oil flow channel 11 in the axial direction; the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are symmetrical about an axis with an angle of 90°.
[0058] Figure 7 As a specific example, as shown in the drawings, the inner diameter of the stator housing 5 is greater than the outer diameter of the stator, the outer diameter of the stator inner housing 5-1 is smaller than the inner diameter of the stator, and the axial length of the stator housing 5 and the stator inner housing 5-1 is the same; the stator housing 5 is installed on the periphery of the stator, the stator inner housing 5-1 is installed at the center of the stator, and the two ends of the stator housing 5 and the stator inner housing 5-1 are installed into the oil inlet side sealing plate 3 and the oil outlet side sealing plate 6, thereby sealing the stator between the stator housing 5 and the stator inner housing 5-1 to form a sealed cooling oil flow channel 11.
[0059] As a specific example, the oil inlet side sealing plate 3 is provided with a first oil distribution port 3-1, a second oil distribution port 3-2 and a third oil distribution port 3-3 corresponding to the open end 2-1 position, the middle position and the closed end 2-3 position of the semicircular annular cooling oil flow channel 2-2, respectively, for sending the cooling oil 9 into the cooling oil flow channel 11 in the axial direction; the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are symmetrical about an axis with an angle of 90°.
[0060] As a specific example, the areas of the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are arranged from small to large to ensure that the oil intake amounts of the first oil distribution port 3-1, the second oil distribution port 3-2 and the third oil distribution port 3-3 are relatively uniform.
[0061] As a specific example, the inner wall of the stator shell 5 and the outer wall of the stator inner shell 5-1 are uniformly provided with eight stator shell arc protrusions 5-2 and stator inner shell arc protrusions 5-3, respectively, which are integrated with the stator shell 5 and the stator inner shell 5-1.
[0062] As shown in Figure 6 As shown in
[0063] As a specific example, the cuboid flow channel 4-2 is in communication with the cooling oil flow channel 11.
[0064] As a specific example, the oil inlet side end cover 1, the stator shell 5, the stator inner shell 5-1 and the oil outlet side end cover 7 are all made of aluminum alloy material.
[0065] It should be noted that the axial flux permanent magnet motor stator oil immersion cooling device of the utility model can be used in combination with other cooling systems, such as a machine shell water cooling system, a rotor oil throwing or oil spraying cooling system, etc.
[0066] The principle and implementation mode of the utility model are described by the specific embodiments, and the above embodiment description is only used to help understand the method of the utility model and its core idea; meanwhile, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the utility model.
Claims
1. An axial flux permanent magnet motor stator oil immersion cooling device, characterized in that, The oil inlet side end cover (1), the oil jacket (2), the oil inlet side sealing plate (3), the stator shell (5), the stator inner shell (5-1), the oil outlet side sealing plate (6), the oil outlet side end cover (7), the oil pump (8), the cooling oil (9) and the oil storage (10) are included. The oil inlet side end cover (1) and the oil outlet side end cover (7) are disc structures with one end open; the oil jacket (2) is a circular ring structure, which is embedded and installed in the inner side of the oil inlet side end cover (1), the outer ring surface is connected with the inner wall of the oil inlet side end cover (1), and the side surface is installed with the oil inlet side sealing plate (3); the oil outlet side end cover (7) is installed with the oil outlet side sealing plate (6) on the side surface; the stator shell (5) and the stator inner shell (5-1) are arranged between the oil inlet side sealing plate (3) and the oil outlet side sealing plate (6), and the stator core (4) and the stator winding (12) are installed in the cavity between the stator shell (5) and the stator inner shell (5-1). The oil inlet port (1-1) is arranged on the oil inlet side end cover (1), the semicircular annular cooling oil flow channel (2-2) is arranged on the oil jacket (2), the first oil distribution port (3-1), the second oil distribution port (3-2) and the third oil distribution port (3-3) are arranged on the oil inlet side sealing plate (3), the oil outlet side sealing plate oil outlet port (6-1) is arranged on the oil outlet side sealing plate (6), and the oil outlet side end cover oil outlet port (7-1) is arranged on the oil outlet side end cover (7). The cooling oil (9) is pumped out from the oil storage (10) through the oil pump (8), is transported to the oil inlet port (1-1) through the oil pipe, is sent into the first oil distribution port (3-1), the second oil distribution port (3-2) and the third oil distribution port (3-3) through the semicircular annular cooling oil flow channel (2-2), and thus enters the cooling oil flow channel (11) between the stator shell (5) and the stator inner shell (5-1) in the axial direction, and flows back to the oil storage (10) through the oil outlet side sealing plate oil outlet port (6-1) and the oil outlet side end cover oil outlet port (7-1) which are communicated.
2. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 1, characterized in that, The oil jacket (2) is provided with the semicircular annular cooling oil flow channel (2-2), one end of the semicircular annular cooling oil flow channel (2-2) is an open end (2-1) connected with the oil inlet port (1-1) on the oil inlet side end cover (1), and the other end is a closed end (2-3).
3. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 1, characterized in that, The oil inlet port (1-1) of the oil inlet side end cover (1) and the oil outlet side end cover oil outlet port (7-1) on the oil outlet side end cover (7) are 90° in the axial angle.
4. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 1, characterized in that, The inner diameter of the stator shell (5) is greater than the outer diameter of the stator, the outer diameter of the stator inner shell (5-1) is less than the inner diameter of the stator, and the axial length of the stator shell (5) and the stator inner shell (5-1) is the same; the stator shell (5) is installed on the periphery of the stator, the stator inner shell (5-1) is installed at the center of the stator, and the two ends of the stator shell (5) and the stator inner shell (5-1) are installed with the oil inlet side sealing plate (3) and the oil outlet side sealing plate (6), so that the stator is sealed between the stator shell (5) and the stator inner shell (5-1), and a sealed cooling oil flow channel (11) is formed.
5. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 1, characterized in that, The first oil distribution port (3-1), the second oil distribution port (3-2) and the third oil distribution port (3-3) are symmetrically arranged with an angle of 90 degrees.
6. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 5, characterized in that, The areas of the first oil distribution port (3-1), the second oil distribution port (3-2) and the third oil distribution port (3-3) are arranged from small to large, so that the oil flow amount of the first oil distribution port (3-1), the second oil distribution port (3-2) and the third oil distribution port (3-3) is uniform.
7. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 5, characterized in that, The inner wall of the stator shell (5) and the outer wall of the stator inner shell (5-1) are uniformly provided with eight stator shell arc protrusions (5-2) and stator inner shell arc protrusions (5-3), respectively, which are integrated with the stator shell (5) and the stator inner shell (5-1).
8. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 1, characterized in that, The two sides of the stator core (4) are provided with rectangular flow channels (4-2) at the bottom of the slots, which are used to increase the flow path of the cooling oil (9) in the stator core (4).
9. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 8, characterized in that, The rectangular flow channels (4-2) are connected with the cooling oil flow channel (11).
10. The axial flux permanent magnet motor stator oil immersion cooling device according to claim 1, characterized in that, The oil inlet side end cover (1), the stator shell (5), the stator inner shell (5-1) and the oil outlet side sealing plate (6) are made of aluminum alloy.