Rotor oil-cooled axial flux motor

Abstract

The utility model discloses a rotor oil-cooled axial magnetic flux motor, and belongs to the technical field of axial magnetic flux motors. The rotor oil-cooled axial flux motor comprises two shells, at least one rotor assembly, at least two stator assemblies and a first cooling piece, the two shells are oppositely attached and connected; the stator assemblies are arranged on the two opposite sides of the rotor assembly respectively, the stator assembly on one side is arranged in one shell, and the rotor assembly is located in the two shells. The first cooling piece is arranged in the shell, an oil inlet of the first cooling piece is formed in the wire passing opening of the shell, an oil spraying opening of the first cooling piece can penetrate through the stator assembly to directly face the rotor assembly, and the first cooling piece is used for spraying cooling oil to the rotor assembly in the axial direction of the shell. The rotor oil cooling axial magnetic flux motor can directly spray cooling oil to the rotor assembly so as to ensure that the cooling oil can cover and cool the whole rotor assembly, so that heat generated by the magnetic steel in the rotor assembly can be timely led out, and a good oil cooling effect on the rotor assembly is ensured.

Description

Technical Field

[0001] This utility model relates to the field of axial flux motor technology, and in particular to rotor oil-cooled axial flux motor. Background Technology

[0002] In axial flux motors (also known as disc motors), both the stator assembly and the rotor assembly are disc-shaped structures arranged along the same axis. A "sandwich" structure can be adopted, that is, a rotor assembly is set between two stator assemblies or a stator assembly is set between two rotor assemblies to overcome the magnetic pull between the stator assembly and the rotor assembly.

[0003] As the continuous output power requirements of automotive axial flux motors increase, the cooling requirements for stator and rotor assemblies also gradually increase. However, in axial flux motors, to avoid eddy current losses in the centrally located rotor assembly, the rotor disk is usually made of non-metallic material. Non-metallic rotor disks are not conducive to timely dissipation of heat generated by the magnets in the rotor assembly. Furthermore, due to the limited contact area between the rotor shaft and the rotor disk, it is not conducive to timely dissipation of heat generated by the magnets through the rotor shaft, resulting in poor cooling effect on the rotor assembly. Utility Model Content

[0004] The purpose of this invention is to provide a rotor oil-cooled axial flux motor that can promptly dissipate the heat generated by the rotor assembly, ensuring a good oil cooling effect on the rotor assembly.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Rotor oil-cooled axial flux motor, including:

[0007] Two housings are fitted together relative to each other;

[0008] At least one rotor assembly and at least two stator assemblies, each of the stator assemblies being disposed on opposite sides of the rotor assembly, with one stator assembly disposed within one of the housings, and the rotor assembly being located within two of the housings;

[0009] A first cooling element is disposed on the housing. The oil inlet of the first cooling element is disposed at the cable outlet of the housing. The oil spray nozzle of the first cooling element can pass through the stator assembly to face the rotor assembly. The first cooling element is used to spray cooling oil onto the rotor assembly along the axial direction of the housing.

[0010] As an optional solution, the first cooling component includes:

[0011] The fuel injection pipe has a first inlet that extends out of the cable guide port and a first injection port that can pass through the stator assembly along the axial direction of the housing to face the rotor assembly.

[0012] As an optional solution, the fuel injection pipe includes:

[0013] A bent tube, one end of which forms the first oil inlet, the bent tube extending radially along the housing;

[0014] The injection pipe is perpendicularly connected to the other end of the bent pipe. The injection pipe extends axially along the housing and can pass through the stator assembly axially along the housing to face the rotor assembly. The end of the injection pipe facing the rotor assembly forms the first oil injection port.

[0015] As an optional solution, the inner sidewall of the housing is recessed with a mounting groove, the mounting groove extends radially along the housing, and the bent tube is engaged in the mounting groove.

[0016] As an optional solution, the stator assembly includes:

[0017] The stator core is attached to the inner wall of the housing;

[0018] The stator coil is connected to the stator core. Along the radial direction of the housing, there is a gap space between the stator core and the stator coil. The injection pipe passes through the gap space to the rotor assembly.

[0019] As an alternative, four to six fuel injection pipes are provided, and each fuel injection pipe is arranged in a ring and uniformly along the circumference of the housing.

[0020] As an optional solution, the rotor oil-cooled axial flux motor further includes:

[0021] The second cooling element is arranged in a ring on the stator assembly. The second cooling element is connected to the fuel injection pipe and is used to cool the stator assembly.

[0022] As an optional solution, the first cooling component includes:

[0023] An oil passage is provided inside the housing. The second oil inlet of the oil passage is provided on the side wall of the through port. The oil passage has a plurality of second oil injection ports, each of which is evenly distributed on the inner side wall of the housing. The cooling oil injected from the second oil injection ports can pass through the hollow circle of the stator assembly to the rotor assembly.

[0024] As an optional solution, the oil passage includes several interconnected branch oil passages, each of which is arranged in a serpentine or mesh-like structure.

[0025] As an optional solution, the rotor oil-cooled axial flux motor further includes:

[0026] The third cooling component is located inside the housing and is arranged in layers with the oil passage. The inlet and outlet of the third cooling component are respectively located on the annular outer circumferential surface of the housing. The third cooling component is used to cool the oil passage.

[0027] The beneficial effects of this utility model are as follows:

[0028] By positioning the rotor assembly between the two stator assemblies, one stator assembly is housed within a single housing, while the rotor assembly is situated within two relatively fitted and connected housings. Simultaneously, a first cooling element is installed within the housing, with its oil inlet located at the cable passage opening. In other words, the cable passage opening for the stator and rotor assemblies is used as the oil inlet location for the first cooling element. This optimizes the use of the cable passage opening space and prevents the oil inlet from occupying other usable space, thus ensuring efficient cooling without requiring additional space. The rational layout of the cooling components can alleviate the limitations imposed on the rotor assembly by the overall structure and usable space, thus improving space utilization. The oil injection port of the first cooling component passes through the stator assembly and faces the rotor assembly directly, allowing the first cooling component to spray cooling oil directly onto the rotor assembly along the axial direction of the housing. Under the centrifugal force of the rotor assembly's own rotation, the sprayed cooling oil diffuses radially inward and outward along the housing, ensuring that the cooling oil can cover and cool the entire rotor assembly. This allows the heat generated by the magnets in the rotor assembly to be dissipated in a timely manner, ensuring a good oil cooling effect on the rotor assembly.

[0029] By pre-embedding the fuel injection pipe, the first inlet of the fuel injection pipe is located inside the cable passage of the housing. That is, the fuel injection pipe is located on one side of the stator assembly. This avoids setting the first inlet on the rotor shaft of the rotor assembly, thus preventing the cooling oil from flowing through the oil passage inside the rotor shaft. This avoids the very complicated rotor shaft rotation sealing problem and can better ensure the sealing effect of the rotor shaft.

[0030] By setting up a first cooling component, a second cooling component, and a third cooling component that work together, it is possible to ensure good cooling and heat dissipation for both the rotor assembly and the stator assembly, thereby ensuring the uniformity of heat dissipation for the entire rotor oil-cooled axial flux motor. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the structure of the rotor oil-cooled axial flux motor (including the fuel injection pipe) provided by this utility model. Figure 1 ;

[0032] Figure 2 yes Figure 1 A magnified view of the structure at point B in the middle;

[0033] Figure 3 This is a schematic diagram of the structure of the rotor oil-cooled axial flux motor (including the oil injection pipe, excluding a housing) provided by this utility model. Figure 2 ;

[0034] Figure 4 This is a schematic diagram of the structure of the housing (with mounting slot) provided by this utility model. Figure 1 ;

[0035] Figure 5 This is a schematic diagram of the stator assembly and rotor assembly provided by this utility model when they are not assembled;

[0036] Figure 6 yes Figure 5 A magnified schematic diagram of the structure at point C in the middle;

[0037] Figure 7 This is a schematic diagram of the assembly structure between the fuel injection pipe and the stator assembly provided by this utility model;

[0038] Figure 8 yes Figure 7 A magnified schematic diagram of the local structure at point D;

[0039] Figure 9 This is a schematic diagram of the assembly structure between the fuel injection pipe, the second cooling component, and the stator assembly provided by this utility model.

[0040] Figure 10 This is a schematic diagram of the structure of the housing (equipped with oil passages and a third cooling component) provided by this utility model. Figure 2 ;

[0041] Figure 11 This is a cross-sectional view of the housing (equipped with oil passages and a third cooling component) provided by this utility model. Figure 1 ;

[0042] Figure 12 This is a cross-sectional view of the housing (equipped with oil passages and a third cooling component) provided by this utility model. Figure 2 .

[0043] Explanation of reference numerals in the attached figures:

[0044] 1-Housing; 11-Cable port; 12-Mounting slot; 13-Inner sidewall;

[0045] 2-Rotor assembly; 21-Rotor disc; 22-Magnet; 23-Rotor shaft; 24-Collar;

[0046] 3-Stator assembly; 31-Stator core; 32-Stator coil; 33-Gap space;

[0047] 41-Injection pipe; 411-First fuel inlet; 412-First injection port; 413-Bent pipe; 414-Injection pipe;

[0048] 42-oil passage; 421-second oil inlet; 422-second fuel injector;

[0049] 5-Second cooling component; 6-Third cooling component; 61-Water inlet; 62-Water outlet. Detailed Implementation

[0050] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0051] Any feature disclosed in this specification, unless specifically stated otherwise, may be replaced by other equivalent or similar features. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features. Throughout this specification, the same reference numerals indicate the same elements.

[0052] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] This embodiment proposes a rotor oil-cooled axial flux motor, which ensures relatively uniform heat dissipation throughout the motor, avoiding localized overheating or overcooling, and thus better guaranteeing the overall performance of the motor. Simultaneously, the rotor oil-cooled axial flux motor can be rationally laid out, ensuring a compact structure and minimizing space occupation. The working principle of the rotor oil-cooled axial flux motor is described here by referring to the working principles of common axial flux motors in the prior art, and will not be described in detail further.

[0055] It is worth noting that the improvement in this embodiment focuses on the cooling structure. Therefore, the specific structures of other structures included in the rotor oil-cooled axial flux motor will not be described in detail. You can refer to the specific structure of the existing axial flux motor.

[0056] Specifically, such as Figures 1 to 8As shown, the rotor oil-cooled axial flux motor includes two housings 1, at least one rotor assembly 2, at least two stator assemblies 3, and a first cooling element. The two housings 1 are connected in close contact with each other. Each stator assembly 3 is respectively disposed on opposite sides of the rotor assembly 2, with one stator assembly 3 located within one housing 1. The rotor assembly 2 is located within both housings 1, and the housings 1, rotor assemblies 2, and stator assemblies 3 all have a disc-shaped structure. The first cooling element is located in the housing 1, with its oil inlet located at the cable outlet 11 of the housing 1. The oil spray nozzle of the first cooling element can pass through the stator assembly 3 to face the rotor assembly 2. The cooling element is used to directly spray cooling oil onto the rotor assembly 2 along the axial direction of the housing 1. Specifically, the axial direction of the housing 1 is as follows... Figure 1 and Figure 3 As shown by arrow A in the diagram.

[0057] Compared to existing technologies, the rotor oil-cooled axial flux motor in this embodiment makes reasonable use of the original cable passage 11 structure of the housing 1, changes the specific layout and oil injection position of the first cooling component, and utilizes the centrifugal force of the rotor assembly 2 itself. By setting the first cooling component in the housing 1, the oil inlet of the first cooling component is placed at the cable passage 11 of the housing 1. That is, the cable passage 11 for the stator assembly 3 and the rotor assembly 2 is used as the location of the oil inlet of the first cooling component. This makes reasonable use of the space of the cable passage 11 and does not cause the oil inlet of the first cooling component to occupy other space. Thus, it can ensure that the oil-cooled axial flux motor is fully utilized without increasing the usable space. The reasonable layout of the first cooling component can relieve the limitations of the rotor assembly 2 due to the overall structure and space constraints. At the same time, the oil spray port of the first cooling component passes through the stator assembly 3 and faces the rotor assembly 2 directly. This allows the first cooling component to spray cooling oil directly onto the rotor assembly 2 along the axial direction of the housing 1. Under the centrifugal force of the rotor assembly 2's own rotation, the sprayed cooling oil diffuses radially inward and outward along the housing 1, ensuring that the cooling oil can cover and cool the entire rotor assembly 2. This allows the heat generated by the magnets 22 in the rotor assembly 2 to be dissipated in a timely manner, ensuring a good oil cooling effect on the rotor assembly 2. Consequently, the heat dissipation effect of the entire rotor oil-cooled axial flux motor is more uniform.

[0058] In this embodiment, as Figure 1 and Figure 2 As shown, the rotor oil-cooled axial flux motor includes a rotor assembly 2 and two stator assemblies 3, with the rotor assembly 2 disposed between the two stator assemblies 3. In other embodiments, the rotor oil-cooled axial flux motor may also include multiple rotor assemblies 2 and multiple stator assemblies 3, with the rotor assembly 2 disposed in the middle of each stator assembly 3.

[0059] The first cooling component (including the fuel injection pipe 41) is described in detail below:

[0060] Furthermore, such as Figures 1 to 8 As shown, the first cooling component includes an oil injection pipe 41, with the first oil inlet 411 extending out of the cable outlet 11 to facilitate connection of an oil pump at the first oil inlet 411; the first oil injection port 412 of the oil injection pipe 41 can pass through the stator assembly 3 along the axial direction of the housing 1 to face the rotor assembly 2, so as to facilitate direct spraying of cooling oil onto the rotor assembly 2 through the first oil injection port 412, thereby ensuring the oil cooling effect of the cooling oil on the rotor assembly 2.

[0061] Cooling oil is sprayed onto the rotor assembly 2 through the oil injection pipe 41. On the one hand, this allows the cooling oil in the oil injection pipe 41 to have a certain pressure, which in turn allows the pressurized cooling oil to exert a certain degree of impact on the rotor assembly 2, thereby ensuring a better oil cooling effect on the rotor assembly 2. On the other hand, it ensures that the first oil injection port 412 of the oil injection pipe 41 directly sprays cooling oil onto the rotor assembly 2, allowing the cooling oil sprayed from the first oil injection port 412 to directly contact and cool the rotor assembly 2, further ensuring the oil cooling effect on the rotor assembly 2.

[0062] Specifically, such as Figure 3 , Figure 6 and Figure 8 As shown, the fuel injection pipe 41 includes a bent pipe 413 and an injection pipe 414; wherein, one end of the bent pipe 413 forms the aforementioned first oil inlet 411, and the bent pipe 413 extends radially along the housing 1, that is, one end of the bent pipe 413 passes through the wire port 11 to connect to the oil pump, and there is no need to set other structures on the housing 1 for the passage of the bent pipe 413, which effectively utilizes the original wire port 11 of the housing 1 and maximizes the utilization of resources; and, the injection pipe 414 is perpendicularly connected to the other end of the bent pipe 413, and the injection pipe 414 extends axially along the housing 1, and the injection pipe 414 can pass through the stator assembly 3 axially along the housing 1 to face the rotor assembly 2, and the end of the injection pipe 414 facing the rotor assembly 2 forms the aforementioned first fuel injection port 412.

[0063] By configuring an oil injection pipe 41 that includes a bent pipe 413 and an injection pipe 414 connected perpendicularly, the structure of the entire oil injection pipe 41 can be simplified and the cost reduced. Furthermore, while ensuring that the bent pipe 413 can smoothly pass through the inlet 11, the arrangement of the injection pipe 414 relative to the rotor assembly 2 is more reasonable, thus ensuring the axial cooling effect of the injection pipe 414 on the rotor assembly 2. Specifically, the bent pipe 413 and the injection pipe 414 can be an integral structure.

[0064] Specifically, such as Figure 3 and Figure 5As shown, the rotor assembly 2 includes a rotor disk 21, a rotor shaft 23, a collar 24, and a plurality of the aforementioned magnets 22. The collar 24 is sleeved on the outer periphery of the rotor disk 21. Each magnet 22 is circumferentially and evenly arranged between the rotor disk 21 and the collar 24. The rotor shaft 23 passes through the hollow circle of the rotor disk 21, and the end of the rotor shaft 23 passes through the stator assembly 3 and the housing 1. The first oil injection port 412 of the aforementioned injection pipe 414 is directly opposite to one side of the rotor disk 21 and is spaced apart.

[0065] Furthermore, such as Figures 5 to 8 As shown, the first oil injection port 412 of the injection pipe 414 directly sprays cooling oil to the middle position of the rotor disk 21. That is, the middle position of the rotor disk 21 specifically refers to the position located in the middle along the radial direction of the housing 1. In other words, the cooling oil is directly sprayed onto the rotor disk 21 near the inner side of the magnet 22, so that the heat generated by the magnet 22 can be dissipated more promptly, further ensuring the oil cooling effect on the rotor assembly 2.

[0066] Specifically, such as Figure 2 and Figure 4 As shown, a mounting slot 12 is recessed in the inner sidewall 13 of the housing 1. The mounting slot 12 extends radially along the housing 1 to ensure that one end of the mounting slot 12 is located in the wire passage 11, and the bent tube 413 is locked in the mounting slot 12 to fix the bent tube 413.

[0067] By providing a mounting slot 12 on the inner sidewall 13 of the housing 1, the bent pipe 413 can be fixedly installed, ensuring the positional stability of the entire fuel injection pipe 41. On the other hand, the bent pipe 413 can be embedded inside the housing 1, ensuring that the stator assembly 3 fits snugly against the inner sidewall 13 of the housing 1, and ensuring that there is no interference between the bent pipe 413 and the stator assembly 3. Furthermore, by pre-embedding the bent pipe 413 in the mounting slot 12, that is, there is no need to provide the bent pipe 413 and the first oil inlet 411 on the rotor shaft 23, so as to avoid the very complicated rotational sealing problem of the rotor shaft 23, thereby ensuring a better sealing effect of the rotor shaft 23.

[0068] Furthermore, such as Figures 3 to 8 As shown, the stator assembly 3 includes a stator core 31 and a stator coil 32; the stator core 31 is attached to the inner wall 13 of the housing 1; the stator coil 32 is connected to the stator core 31, and a gap space 33 is formed between the stator core 31 and the stator coil 32 along the radial direction of the housing 1. The injection pipe 414 passes through the gap space 33 to one side of the rotor disk 21 of the rotor assembly 2. The gap space 33 is formed according to the processing technology of the stator assembly 3 and the creepage distance.

[0069] By passing the injection pipe 414 through the gap space 33 to one side of the rotor disk 21 of the rotor assembly 2, the injection pipe 414 can be rationally arranged without changing the original layout structure of the stator assembly 3. This prevents the injection pipe 414 from occupying additional space in the stator assembly 3, better solving the problem of limited oil cooling effect on the rotor assembly 2 caused by the structure and space limitations of the entire rotor oil-cooled axial flux motor, and maximizing resource utilization. Multiple gap spaces 33 are provided, and each gap space 33 is spaced apart and evenly distributed along the circumference of the stator core 31 to facilitate the passage of the injection pipe 414 through each gap space 33.

[0070] It is worth noting that, such as Figures 1 to 3 As shown, since the stator core 31 is attached to the inner wall 13 of the housing 1, the bent tube 413 embedded in the inner wall 13 of the housing 1 can indirectly cool and dissipate heat for the stator core 31. At the same time, since the spray pipe 414 passes through the gap space 33 between the stator core 31 and the stator coil 32 to one side of the rotor disk 21 of the rotor assembly 2, the spray pipe 414 can provide a certain indirect cooling and heat dissipation effect for the stator core 31 and the stator coil 32. That is, while directly oil-cooling the rotor assembly 2, the oil spray pipe 41 can appropriately improve the heat dissipation capacity of the stator assembly 3, thereby ensuring the heat dissipation uniformity of the entire rotor oil-cooled axial flux motor.

[0071] Furthermore, four to six oil injection pipes 41 are provided (only one is shown in the attached drawings of the specification). Each oil injection pipe 41 is arranged in a ring along the circumference of the housing 1. That is, the injection pipe 414 of one oil injection pipe 41 passes through the aforementioned gap space 33 and faces one side of the rotor disk 21. Thus, cooling oil can be sprayed onto the rotor disk 21 simultaneously through each circumferentially distributed injection pipe 414. This ensures that the cooling oil can be distributed throughout the entire rotor disk 21 and each magnet 22 under the action of centrifugal force, thereby ensuring a better oil cooling effect on the rotor disk 21 and magnet 22.

[0072] Specifically, the various oil injection pipes 41 are interconnected, so that only one first oil inlet 411 is needed to achieve oil intake, which ensures that the structure of the entire rotor oil-cooled axial flux motor is simple and compact, without increasing the manufacturing cost.

[0073] The second cooling component 5 is described in detail below:

[0074] Specifically, such as Figure 1 and Figure 9As shown, the rotor oil-cooled axial flux motor also includes a second cooling component 5. The second cooling component 5 is arranged in a ring on the stator core 31 of the stator assembly 3. The second cooling component 5 is connected to the oil injection pipe 41. The second cooling component 5 is used to cool the stator assembly 3 so as to ensure a better oil cooling effect on the stator assembly 3, and thus better ensure the heat dissipation uniformity of the entire rotor oil-cooled axial flux motor.

[0075] Furthermore, such as Figure 9 As shown, the second cooling component 5 includes two annular oil pipes. One annular oil pipe is placed close to the inner annular wall of the hollow circle of the stator core 31 and is connected to the spray pipe 414. The other annular oil pipe is placed close to the outer annular circumferential surface of the stator core 31 and is connected to the bending pipe 413. This arrangement allows for the reasonable placement of the two annular oil pipes, preventing interference between the two annular oil pipes and the operation of the stator core 31 fitting against the inner wall 13 of the housing 1, thus ensuring the stability of the stator core. The iron core 31 can be smoothly attached to the inner wall 13 of the housing 1; and by placing the two annular oil pipes directly and tightly on the stator iron core 31, the distance between the annular oil pipes and the stator iron core 31 can be shortened, so that the cooling oil in the annular oil pipes has a better oil cooling effect on the stator iron core 31 and the entire stator assembly 3, thereby ensuring that the stator iron core 31 is oil-cooled while the oil injection pipe 41 cools the rotor disk 21, so as to further ensure the uniformity of heat dissipation of the entire rotor oil-cooled axial flux motor.

[0076] It is worth noting that, such as Figure 9 As shown, since both annular oil pipes are connected to the oil injection pipe 41, only one first oil inlet 411 is needed to achieve oil inlet, which can better ensure that the structure of the entire rotor oil-cooled axial flux motor is simple and compact, without increasing the manufacturing cost.

[0077] Specifically, the housing 1 is filled with potting compound. On the one hand, the potting compound can fix the two annular oil pipes to ensure the stability of their positions. At the same time, the potting compound can also fix each fuel injection pipe 41 to ensure the stability of their positions. On the other hand, the potting compound can conduct heat to the stator assembly 3, thereby better ensuring the cooling effect of the stator assembly 3.

[0078] The third cooling component 6 is described in detail below:

[0079] Furthermore, such as Figure 10 and Figure 11As shown, the rotor oil-cooled axial flux motor also includes a third cooling component 6, which is located inside the housing 1. The water inlet 61 and water outlet 62 of the third cooling component 6 are respectively located on the annular outer circumferential surface of the housing 1, so that the stator core 31 and stator coil 32 can be cooled by the cooling water inside the third cooling component 6, thereby ensuring the water cooling heat dissipation effect of the stator assembly 3 through the third cooling component 6.

[0080] Furthermore, the fuel injection pipe 41 and the annular oil pipe can be cooled by the cooling water in the third cooling component 6. That is, the cooling oil in the fuel injection pipe 41 and the annular oil pipe can be directly cooled and dissipated by the cooling water, without the need to add an additional heat exchanger to cool the cooling oil in the fuel injection pipe 41 and the annular oil pipe, further ensuring the simplicity and compactness of the structure and saving costs.

[0081] Specifically, the third cooling component 6 includes multiple interconnected cooling water channels ( Figure 11 (Not shown in the image) Each cooling water channel is located inside the housing 1, and each cooling water channel can be connected to form a serpentine structure or a mesh structure to increase the flow path and flow area of ​​the cooling water inside the housing 1, thereby ensuring that the water cooling effect on the stator assembly 3, the fuel injection pipe 41 and the annular oil pipe through each cooling water channel is relatively uniform and comprehensive.

[0082] In this embodiment, the rotor oil-cooled axial flux motor has an oil injection pipe 41 pre-embedded in the housing 1, which allows the oil injection pipe 41 to directly spray cooling oil onto the rotor disk 21. Under the centrifugal force of the rotor disk 21, the cooling oil can be distributed throughout the entire rotor disk 21 and each magnet 22, ensuring a direct oil cooling effect on the rotor assembly 2. Furthermore, the oil injection pipe 41 can be arranged by making reasonable use of the original wire passage 11 in the housing 1 and the gap space 33 between the stator core 31 and the stator coil 32. This ensures that the layout of the oil injection pipe 41 does not affect the original structural settings of the housing 1, stator assembly 3, and rotor assembly 2. As a result, the pre-embedded layout of the oil injection pipe 41 is relatively simple and reasonable, does not occupy additional space, and improves space utilization.

[0083] In this embodiment, the rotor oil-cooled axial flux motor, by setting up an oil injection pipe 41, an annular oil pipe, potting compound and cooling water channel that work together, can ensure a good cooling and heat dissipation effect on the stator assembly 3, thereby ensuring the heat dissipation effect on both the rotor assembly 2 and the stator assembly 3, and better ensuring the heat dissipation uniformity of the entire rotor oil-cooled axial flux motor.

[0084] In this embodiment, the rotor oil-cooled axial flux motor has a pre-embedded oil injection pipe 41, and the first oil inlet 411 of the oil injection pipe 41 is located inside the wire passage 11 of the housing 1. That is, the oil injection pipe 41 is located on one side of the stator core 31. This avoids setting the first oil inlet 411 on the rotor shaft 23, so as to avoid the cooling oil from flowing through the oil passage 42 inside the rotor shaft 23. This avoids the very complicated rotational sealing problem of the rotor shaft 23, and thus can better ensure the sealing effect of the rotor shaft 23.

[0085] Example 2

[0086] This embodiment proposes a rotor oil-cooled axial flux motor. The structure of the rotor oil-cooled axial flux motor is basically the same as that in Embodiment 1, except that the specific arrangement structure of the first cooling element is different.

[0087] The first cooling component (including oil passage 42) is described in detail below:

[0088] Specifically, such as Figure 10 and Figure 12 As shown, the first cooling component includes an oil passage 42, which is disposed inside the housing 1. The second oil inlet 421 of the oil passage 42 is disposed on the side wall of the wire passage 11. The oil passage 42 has a plurality of second oil injection ports 422, which are evenly distributed on the inner side wall 13 of the housing 1. The cooling oil sprayed from the second oil injection ports 422 can pass through the hollow circle of the stator assembly 3 to the rotor assembly 2.

[0089] Specifically, such as Figure 10 and Figure 12 As shown, cooling oil flows in from the second oil inlet 421, flows through the oil passage 42, and is then sprayed out from each of the second oil spray ports 422. At this time, the cooling oil sprayed out from the second oil spray ports 422 can pass through the hollow circle of the stator core 31 and the stator coil 32 and be directly sprayed onto the side of the rotor disk 21 to achieve direct oil cooling of the rotor assembly 2. In addition, the cooling oil sprayed out from the second oil spray ports 422 can also cool the stator assembly 3, ensuring the cooling effect of the stator assembly 3.

[0090] Furthermore, such as Figure 10 and Figure 12 As shown, the second oil injection ports 422 can be arranged in a serpentine or mesh structure on the inner wall 13 of the housing 1 to ensure that the cooling oil is sprayed onto the rotor disk 21 in a relatively uniform and comprehensive manner through each second oil injection port 422. In this embodiment, the second oil injection ports 422 are arranged in a mesh structure on the inner wall 13 of the housing 1. The two annular oil pipes in the first embodiment are connected to the second oil inlet 421.

[0091] Specifically, such as Figure 12As shown, the oil passage 42 includes several interconnected branch oil passages. Each branch oil passage is arranged in a serpentine or mesh structure to increase the flow path and flow area of ​​the cooling oil inside the housing 1, thereby ensuring a good direct oil cooling effect on the rotor assembly 2 through each branch oil passage. At the same time, each branch oil passage and each second oil injection port 422 can ensure the oil cooling effect on the stator assembly 3 and the annular oil pipe. In this embodiment, each branch oil passage is connected inside the housing 1 to form a mesh structure.

[0092] Furthermore, such as Figure 11 and Figure 12 As shown, the third cooling component 6 and the oil passage 42 are arranged in layers with intervals. That is, each cooling water passage is arranged in one layer inside the shell 1, and each branch oil passage is arranged in another layer inside the shell 1. On the one hand, this makes the processing of the entire shell 1 simpler and reduces processing costs. On the other hand, it ensures that the cooling water passage and the branch oil passage do not interfere with each other.

[0093] Furthermore, each cooling water channel can also cool each branch oil channel, allowing the cooling oil in each branch oil channel to be directly cooled and dissipated by the cooling water in the cooling water channel. This eliminates the need for additional heat exchangers to cool the cooling oil in the branch oil channels, better ensuring the simplicity and compactness of the structure and saving costs.

[0094] In this embodiment, the rotor oil-cooled axial flux motor has pre-set branch oil channels in the housing 1, which allow cooling oil to be directly sprayed onto the rotor disk 21. Under the centrifugal force of the rotor disk 21, the cooling oil can be distributed throughout the rotor disk 21 and each magnet 22, ensuring a direct oil cooling effect on the rotor assembly 2. Furthermore, the internal structure of the housing 1 can be reasonably utilized, so that the layout of each branch oil channel will not affect the original structural settings of the housing 1, stator assembly 3, and rotor assembly 2. As a result, the pre-set layout of the branch oil channels is relatively simple and reasonable, and will not occupy additional space.

[0095] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A rotor oil-cooled axial flux electric machine, characterized in that, The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor.

2. The rotor oil-cooled axial flux motor of claim 1, wherein, The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor.

3. The oil-cooled axial flux motor rotor of claim 2, wherein, The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor.

4. The oil-cooled axial flux motor rotor of claim 3, wherein, The application relates to a rotor-oil-cooled axial flux motor.

5. The oil-cooled axial flux motor rotor of claim 3, wherein, The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor.

6. The rotor oil-cooled axial flux electric machine of any one of claims 2-5, wherein, The application relates to a rotor-oil-cooled axial flux motor.

7. The oil-cooled axial flux motor rotor of any one of claims 2-5, wherein, The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor.

8. The rotor oil-cooled axial flux motor of claim 1, wherein, The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to a rotor-oil-cooled axial flux motor. The application relates to An oil passage (42) is arranged inside the housing (1), a second oil inlet (421) of the oil passage (42) is arranged on the side wall of the wire passage (11), the oil passage (42) has a plurality of second oil injection ports (422), each of the second oil injection ports (422) is uniformly arranged on the inner side wall (13) of the housing (1), and the cooling oil injected from the second oil injection port (422) can pass through the hollow circle of the stator assembly (3) to the rotor assembly (2).

9. The oil-cooled axial flux motor rotor of claim 8, wherein, The oil passage (42) comprises a plurality of branch oil passages in communication with each other, each of the branch oil passages is arranged in a snake shape or a mesh shape.

10. A rotor oil-cooled axial flux electric machine as claimed in claim 8 or 9, characterised in that, The rotor oil-cooled axial flux motor further comprises: A third cooling member (6) is arranged inside the housing (1), the third cooling member (6) is arranged in a layered and spaced manner with the oil passage (42), a water inlet (61) and a water outlet (62) of the third cooling member (6) are arranged on the annular outer circumferential surface of the housing (1) respectively, and the third cooling member (6) is used for cooling the oil passage (42).

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