Oil-cooled generator and automobile

Abstract

The present application discloses an oil-cooled generator and automobile, which include a rotor assembly and a stator assembly, wherein the stator assembly is sleeved outside the rotor assembly; a storage box; the bottom of the storage box has an oil cavity; the rotor assembly and the stator assembly are both located in the storage box; an oil channel is arranged in the rotor assembly and communicated with the oil cavity; an oil outlet hole is arranged extending from the axial end face of the rotor assembly toward the inside of the rotor assembly and communicated with the oil channel. The present application can realize the provision of oil channels and oil outlet holes on the rotor assembly through one-time manufacturing of the mold, and the oil supply pipe and the spray pipe can also be assembled to the outside of the stator assembly after the manufacturing is completed, so that there is no oil channel design on the stator assembly, which can reduce the manufacturing difficulty and assembly difficulty while being able to cool the stator assembly and the rotor assembly, thereby achieving the purpose of improving production efficiency.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an oil-cooled generator and an automobile. Background Art

[0002] As a type of hybrid vehicle, the extended-range vehicle can charge the battery through the engine-driven generator when the power battery is low on power. The generator will generate heat when it is working, such as heating of the stator coil and friction of the bearings. Excessive motor temperature will accelerate the aging of the insulation material and affect the life of the motor. Therefore, the generator needs to be cooled when the range extender is working to ensure that the generator does not overheat during operation, and to ensure that the bearings and other components are fully lubricated. At present, there are two ways to cool the motor: oil cooling and water cooling. Water cooling is performed through the water jacket on the motor housing, but water cooling cannot directly contact electrical components, and the cooling effect is poor; oil cooling is performed by spraying or immersing the motor windings, and the heat dissipation effect is better. Therefore, in actual production and use, oil cooling is more often used to cool the generator.

[0003] For oil-cooled generators, the prior art has proposed a utility model patent with authorization announcement number CN206211738U: a number of oil passages are evenly distributed in the stator, and each oil passage in the stator is connected to a number of oil injection holes, which penetrate the inner wall of the stator. In this way, when oil is supplied in the oil passage, the cooling oil can flow out through the oil injection holes and flow through the rotor sleeved on the inner side of the stator to achieve cooling of the stator and the rotor. However, since the stator is composed of multiple silicon steel sheets, when making the oil passage on the stator, it is necessary to drill holes in each silicon steel sheet, align the holes on each silicon steel sheet, and finally stack them into oil passages, which makes the stator more difficult to manufacture, requires higher assembly accuracy of the stator, and reduces production efficiency. Utility Model Content

[0004] One of the purposes of the present application is to provide an oil-cooled generator to solve the technical problem in the related art that an oil channel is provided on the stator, which has high manufacturing difficulty and high assembly precision requirements, resulting in reduced production efficiency; the second purpose is to provide a car.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An oil-cooled generator comprises a rotor assembly and a stator assembly, wherein the stator assembly is sleeved outside the rotor assembly, and further comprises:

[0007] A storage box; the bottom of the storage box has an oil cavity; the rotor assembly and the stator assembly are both located in the storage box;

[0008] An oil passage is disposed in the rotor assembly and communicates with the oil chamber;

[0009] The oil outlet hole is extended from the axial end surface of the rotor assembly toward the inside of the rotor assembly and is communicated with the oil passage.

[0010] According to the above technical means, by setting an oil channel in the rotor assembly and setting an oil outlet hole on the axial end face of the rotor assembly, when cooling oil is supplied to the oil channel through the oil cavity, the cooling oil can directly reach the rotor assembly through the oil channel, thereby cooling the rotor assembly; at the same time, during the rotation of the rotor assembly, the cooling oil can be sprayed out from the oil outlet hole and splashed onto the stator assembly, thereby cooling the stator assembly. In addition, there is no oil channel design on the stator assembly, and only the oil channel and the oil outlet hole are set on the rotor assembly, which can be manufactured at one time through a mold, achieving the goal of reducing the manufacturing difficulty and the assembly difficulty while being able to cool the stator assembly and the rotor assembly, thereby achieving the purpose of improving production efficiency.

[0011] Further, the rotor assembly comprises:

[0012] The rotor shaft has a first oil passage disposed therein;

[0013] The rotor hub is sleeved on the rotor shaft; a second oil passage is arranged in the rotor hub, the second oil passage is connected with the first oil passage, and an oil passage is formed; an oil outlet hole is arranged on the rotor hub;

[0014] The motor rotor is sleeved on the rotor hub.

[0015] According to the above technical means, the oil channel is formed by connecting a first oil channel arranged on the rotor shaft and a second oil channel arranged on the rotor hub, so that there is no need to process the oil channel on the motor rotor, and it is only necessary to process the oil channel on the rotor shaft and the rotor hub. This achieves the goal of further reducing the manufacturing difficulty and assembly difficulty while cooling the rotor assembly, thereby further improving production efficiency.

[0016] Furthermore, the oil-cooled generator further comprises:

[0017] An oil supply pipe is arranged outside the stator assembly and communicated with the oil chamber;

[0018] A plurality of spray pipes are distributed on the periphery of the stator assembly along the circumferential direction of the stator assembly; the spray pipes are communicated with the oil supply pipe.

[0019] According to the above technical means, when cooling oil is supplied to the oil supply pipe, the cooling oil can be sprayed to the periphery of the stator assembly through the spray pipe, thereby cooperating with the oil channel inside and outside to improve the cooling efficiency of the stator assembly; and, the oil supply pipe and the spray pipe are both located outside the stator assembly, and only the oil supply pipe and the spray pipe need to be assembled, without the need to manufacture the oil channel in the stator assembly, thereby avoiding increased manufacturing and assembly difficulty.

[0020] Further, the diameter of the inlet end of the oil passage is smaller than the diameter of the inlet end of the oil supply pipe.

[0021] According to the above technical means, when the cooling oil flowing out of the oil chamber is diverted to the oil channel and the oil supply pipe, the flow rate of the oil supply pipe can be increased and the flow rate of the oil channel can be reduced, thereby improving the heat dissipation efficiency of the stator assembly and meeting the high heat dissipation demand of the stator assembly when the generator is working.

[0022] Furthermore, the oil-cooled generator further comprises:

[0023] The filter is arranged in the receiving box and communicated with the oil cavity;

[0024] An oil pump is arranged at the outlet of the filter;

[0025] The oil cooling assembly is arranged at the outlet of the oil pump and is communicated with the oil channel and the oil supply pipe respectively.

[0026] According to the above technical means, when the cooling oil sprayed onto the stator assembly drips into the oil cavity at the bottom of the storage box under the action of gravity, it can be filtered by the filter and heat exchanged by the oil cooling assembly for recycling.

[0027] Furthermore, among the plurality of spray pipes, the number of the spray pipes distributed above the center line of the stator assembly is greater than the number of the spray pipes distributed below the center line of the stator assembly.

[0028] According to the above technical means, after the spray pipes above the center line spray, the cooling oil can cover the upper half of the stator assembly and can partially flow to the lower half of the stator assembly; the spray pipes below the center line can perform targeted spray cooling on areas with insufficient flow, thereby reasonably distributing the spray pipes and avoiding too many spray pipes occupying too much space in the storage box, while allowing most of the area of ​​the stator assembly to be covered by the cooling oil.

[0029] Furthermore, the number of spray pipes distributed above the center line of the stator assembly accounts for 70% to 80% of the total number of spray pipes.

[0030] According to the above technical means, almost the entire surface area of ​​the stator assembly can be covered by cooling oil, thereby improving the cooling effect on the stator assembly.

[0031] Furthermore, the oil-cooled generator further comprises:

[0032] A bearing assembly is sleeved on the rotor assembly;

[0033] Assembly gap; a portion of the receiving box is sleeved on the rotor assembly from the side of the rotor assembly close to the bearing assembly; the assembly gap position

[0034] It is located between the receiving box and the rotor assembly and is communicated with the oil passage to guide the cooling oil to the bearing assembly.

[0035] According to the above technical means, when the rotor assembly rotates, the cooling oil supplied to the oil channel can also overflow to the bearing assembly through the assembly gap, thereby cooling the bearing assembly while cooling the rotor assembly and the stator assembly, thereby improving the oil cooling effect on the generator.

[0036] Further, the stator assembly is at least partially located in the oil cavity.

[0037] According to the above technical means, the cooling oil in the oil cavity can immerse a part of the stator assembly, thereby cooling the lower half of the stator assembly and further improving the cooling effect of the stator assembly.

[0038] A car comprises any one of the above oil-cooled generators.

[0039] Beneficial effects of the utility model:

[0040] (1) When cooling oil is supplied to the oil channel through the oil chamber, the cooling oil can directly reach the rotor assembly through the oil channel, thereby cooling the rotor assembly; during the rotation of the rotor assembly, the cooling oil can be sprayed out from the oil outlet and splashed onto the stator assembly, thereby cooling the stator assembly; at the same time, the oil chamber can also supply oil to the spray pipe through the oil supply pipe, thereby cooling the stator assembly from the periphery of the stator assembly.

[0041] (2) Through one-time manufacturing with a mold, it is possible to set oil channels and oil outlets on the rotor assembly. The oil supply pipe and the spray pipe can also be assembled to the outside of the stator assembly after the manufacturing is completed, so that there is no oil channel design on the stator assembly. This can reduce the temperature of the stator assembly and the rotor assembly while reducing the difficulty of manufacturing and assembly, thereby achieving the purpose of improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the principle of the oil-cooled generator in this application;

[0043] Figure 2 It is a structural schematic diagram of a box cover of a specific embodiment of the present application;

[0044] Figure 3 It is a schematic diagram of the assembly structure of a positioning component, an oil supply pipe and a spray pipe in a specific embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of the assembly structure of a rotor assembly and a box cover of a specific embodiment of the present application;

[0046] Figure 5 It is a schematic diagram of the assembly structure of a rotor hub and a rotor shaft according to a specific embodiment of the present application.

[0047] Among them, 1-rotor assembly; 101-rotor shaft; 102-rotor hub; 103-motor rotor; 2-stator assembly; 3-oil channel; 4-oil outlet; 5-oil supply pipe; 6-spray pipe; 601-spray hole; 7-filter; 8-oil pump; 9-oil cooling assembly; 10-third oil channel; 11-fourth oil channel; 12-bearing assembly; 13-second bearing assembly; 14-groove structure; 15-casing; 16-casing cover; 17-fifth oil channel; 18-sixth oil channel. DETAILED DESCRIPTION

[0048] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0049] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0050] This embodiment provides an oil-cooled generator, such as Figure 1 and Figure 4 As shown, the oil-cooled generator includes a rotor assembly 1, a stator assembly 2, a storage box, an oil passage 3 and an oil outlet 4 (such as Figure 5 As shown); wherein, the stator assembly 2 is sleeved outside the rotor assembly 1, the bottom of the receiving box has an oil cavity, and the rotor assembly 1 and the stator assembly 2 are both located in the receiving box;

[0051] The oil passage 3 is arranged in the rotor assembly 1 and is connected with the oil chamber, so that cooling oil is supplied to the oil passage 3 through the oil chamber; the oil outlet hole 4 is extended from the axial end surface of the rotor assembly 1 toward the inside of the rotor assembly 1 and is connected with the oil passage 3. When the oil chamber supplies oil to the oil passage 3, the cooling oil can also flow to the oil outlet hole 4 through the oil passage 3, so that when the rotor assembly 1 rotates, the cooling oil is splashed outward from the oil outlet hole 4.

[0052] It should be noted that when the rotor assembly 1 rotates, the cooling oil sprayed outward from the oil outlet hole 4 can spray onto the stator assembly 2 , thereby achieving cooling of the stator assembly 2 .

[0053] In this embodiment, by setting an oil passage 3 in the rotor assembly 1 and setting an oil outlet hole 4 on the axial end face of the rotor assembly 1, when cooling oil is supplied to the oil passage 3 through the oil cavity, the cooling oil can directly reach the rotor assembly 1 through the oil passage 3, thereby cooling the rotor assembly 1; at the same time, during the rotation of the rotor assembly 1, the cooling oil can be sprayed out from the oil outlet hole 4 and splashed onto the stator assembly 2, thereby cooling the stator assembly 2. In addition, there is no oil passage design on the stator assembly 2, and only the oil passage 3 and the oil outlet hole 4 are set on the rotor assembly 1, which can be manufactured at one time through a mold, achieving the goal of reducing the manufacturing difficulty and the assembly difficulty while being able to cool the stator assembly 2 and the rotor assembly 1, thereby achieving the purpose of improving production efficiency.

[0054] In one implementation of this embodiment, three to five oil outlet holes 4 are provided on both axial end faces of the rotor assembly 1 .

[0055] In this embodiment, Figure 4 As shown, the rotor assembly 1 includes a rotor shaft 101, a rotor hub 102 and a motor rotor 103; wherein, a first oil passage is arranged in the rotor shaft 101; the rotor hub 102 is sleeved on the rotor shaft 101; a second oil passage is arranged in the rotor hub 102, the second oil passage is communicated with the first oil passage, and an oil passage 3 is formed; an oil outlet hole 4 is arranged on the rotor hub 102 and extends to the axial end face of the rotor hub 102; the motor rotor 103 is sleeved on the rotor hub 102.

[0056] The first oil passage arranged on the rotor shaft 101 and the second oil passage arranged on the rotor hub 102 are connected to form the oil passage 3; therefore, in this embodiment, there is no need to process the oil passage on the motor rotor 103, and only the oil passage 3 needs to be processed on the rotor shaft 101 and the rotor hub 102, so that the manufacturing difficulty and the assembly difficulty are further reduced while cooling the rotor assembly 1, thereby further improving the production efficiency.

[0057] In this embodiment, the oil passage 3 is directly arranged on the rotor shaft 101 and the rotor hub 102, so as to directly cool the rotor shaft 101 and the rotor hub 102, save the oil passage arrangement in the motor rotor 103, further save the production and processing procedures, and improve the production efficiency.

[0058] In this embodiment, Figure 3 As shown, the oil-cooled generator further includes an oil supply pipe 5 and a plurality of spray pipes 6; the oil supply pipe 5 is disposed in the receiving box and outside the stator assembly 2, and the oil supply pipe 5 is communicated with the oil cavity, so that the oil cavity can supply cooling oil to the oil supply pipe 5. The plurality of spray pipes 6 are distributed on the periphery of the stator assembly 2 along the circumferential direction of the stator assembly 2, and each spray pipe 6 is communicated with the oil supply pipe 5.

[0059] When cooling oil is supplied to the oil supply pipe 5, the cooling oil can be sprayed to the periphery of the stator assembly 2 through the spray pipe 6, thereby cooperating with the oil passage 3 inside and outside to improve the cooling efficiency of the stator assembly 2. In addition, the oil supply pipe 5 and the spray pipe 6 are both located outside the stator assembly 2, and only the oil supply pipe 5 and the spray pipe 6 need to be assembled, and there is no need to manufacture the oil passage 3 in the stator assembly 2, thereby avoiding the increase of manufacturing difficulty and assembly difficulty.

[0060] In this embodiment, the diameter of the inlet end of the oil channel 3 is smaller than the diameter of the inlet end of the oil supply pipe 5; that is, compared with the oil supply pipe 5, the diameter of the inlet end of the oil channel 3 is smaller, so that the inlet end of the oil channel 3 has a certain throttling effect. Then, when the cooling oil flowing out of the oil chamber is diverted to the oil channel 3 and the oil supply pipe 5, the flow rate of the oil supply pipe 5 can be increased and the flow rate of the oil channel 3 can be reduced, thereby improving the heat dissipation efficiency of the stator assembly 2 and meeting the high heat dissipation demand of the stator assembly 2 when the generator is working.

[0061] It should be noted that each spray pipe 6 is provided with a plurality of spray holes 601 , and the number of the spray holes 601 is not limited.

[0062] In one implementation of this embodiment, the number of spray holes 601 on the spray pipe 6 is 3 to 8, the diameter of the spray hole 601 is 1.2 mm to 2 mm, and the setting height and spray angle of the spray pipe 6 can be set according to the actual requirements of the spray area to ensure that all parts of the stator assembly 2 can be spray-cooled.

[0063] In this embodiment, a plurality of spray pipes 6 are sequentially distributed along the circumferential direction of the stator assembly 2 , and the number of spray pipes 6 distributed above the center line of the stator assembly 2 is greater than the number of spray pipes 6 distributed below the center line of the stator assembly 2 .

[0064] Specifically, after the spray pipe 6 above the center line sprays, the cooling oil can cover the upper half of the stator assembly 2; due to the effect of gravity, the cooling oil sprayed to the upper half of the stator assembly 2 will flow downward, and part of it will flow to the lower half of the stator assembly 2. Therefore, when the spray pipe 6 above the center line cools the upper half of the stator assembly 2, it can also cool part of the lower half of the stator assembly 2. Since there will be mounting ears on the stator assembly 2, when the cooling oil flows downward from the upper half of the stator assembly 2, it may be blocked by the ears, resulting in less cooling oil flowing to the lower half of the stator assembly 2 due to gravity. Therefore, in this embodiment, the spray pipe 6 below the center line can perform fixed-point spray cooling on the area with insufficient flow. Therefore, in this embodiment, while the spray pipes 6 are reasonably distributed and the number of spray pipes 6 is avoided to occupy too much space in the storage box, most of the area of ​​the stator assembly 2 can be covered by the cooling oil.

[0065] It should be noted that, among the multiple spray pipes 6 distributed below the center line of the stator assembly 2, there are at least one or more spray pipes 6 close to the lowest point of the stator assembly 2 to ensure that the lowest point of the lower half circle of the stator assembly 2 can also be covered by cooling oil, thereby improving the cooling effect on the stator assembly 2.

[0066] In one implementation of the present embodiment, the number of spray pipes 6 distributed above the center line of the stator assembly 2 accounts for 70% to 80% of the total number of spray pipes 6, and the number of spray pipes 6 distributed below the center line of the stator assembly 2 accounts for 20% to 30% of the total number of spray pipes 6, so that almost all of the surface area of ​​the stator assembly 2 can be covered by cooling oil, thereby improving the cooling effect on the stator assembly 2.

[0067] In this embodiment, Figure 4 As shown, the oil-cooled generator also includes a bearing assembly 12 and an assembly gap; the bearing assembly 12 is sleeved on the rotor assembly 1; a portion of the receiving box is sleeved on the rotor assembly 1 from the side of the rotor assembly 1 close to the bearing assembly 12; the assembly gap is located between the receiving box and the rotor assembly 1, and is connected to the oil channel 3 to guide the cooling oil to the bearing assembly 12.

[0068] When the rotor assembly 1 rotates, the cooling oil supplied to the oil passage 3 can also overflow to the bearing assembly 12 through the assembly gap, thereby cooling the bearing assembly 12 while cooling the rotor assembly 1 and the stator assembly 2, thereby improving the oil cooling effect on the generator.

[0069] In this embodiment, Figure 1 and Figure 2 As shown, the storage box includes a box body 15 and a box cover 16; the box cover 16 is buckled at the opening of the box body 15, and the stator assembly 2, the rotor assembly 1 and the oil chamber are all arranged in the box body 15. In the rotor assembly 1, one axial end of the rotor shaft 101 is engaged with the box cover 16 and can rotate relative to the box cover 16; and the assembly gap is located between the rotor shaft 101 and the box cover 16; the bearing assembly 12 is located on the side of the rotor shaft 101 close to the box cover 16, and is sleeved on the rotor shaft 101, so when oil is supplied to the first oil channel, the cooling oil can overflow from the assembly gap and be guided to the bearing assembly 12 by the assembly gap to cool the bearing assembly 12.

[0070] In this embodiment, Figure 1 As shown, the oil-cooled generator also includes a filter 7, an oil pump 8 and an oil cooling assembly 9; the filter 7 is arranged at the receiving

[0071] The oil pump 8 is arranged at the outlet of the filter 7; the oil cooling assembly 9 is arranged at the outlet of the oil pump 8 and is respectively connected with the oil passage 3 and the oil supply pipe 5. The filter 7 is connected with the oil pump 8 through the third oil passage 10, and the oil pump 8 is connected with the oil cooling assembly 9 through the fourth oil passage 11. The third oil passage 10 and the fourth oil passage 11 are both arranged on the box cover 16.

[0072] Since the stator assembly 2 and the rotor assembly 1 are both located in the storage box, and the oil cavity is located at the bottom of the storage box (located below the stator assembly 2 and the rotor assembly 1), when the cooling oil drips from the stator assembly 2 and the rotor assembly 1, it can flow back into the oil cavity for recycling. Specifically, when the cooling oil sprayed on the stator assembly 2 drips into the oil cavity at the bottom of the storage box under the action of gravity, it can be filtered by the filter 7 and heat exchanged by the oil cooling assembly 9 in sequence for recycling.

[0073] In this embodiment, Figure 2 As shown, the tank cover 16 is also provided with a fifth oil passage 17 and a sixth oil passage 18 . The fifth oil passage 17 connects the oil cooling assembly 9 with the oil supply pipe 5 , and the sixth oil passage 18 connects the oil cooling assembly 9 with the oil passage 3 .

[0074] It should be noted that if Figure 4 As shown, a bearing assembly (a second bearing assembly 13) is also sleeved on the side of the rotor shaft 101 facing away from the box cover 16, and the second bearing assembly 13 is located in the box body 15; when the rotor assembly 1 rotates and sprays cooling oil outward from the oil outlet 4, the cooling oil can be sprayed onto the second bearing assembly 13, thereby achieving cooling and lubrication of the second bearing assembly 13.

[0075] A groove structure 14 is provided at one end of the rotor shaft 101 close to the case cover 16 in the axial direction. The groove structure 14 is coaxially arranged with the first oil passage and communicated with each other. The oil pump 8 is a mechanical oil pump. The oil pump 8 is provided on the case cover 16. The transmission shaft of the oil pump 8 cooperates with the groove structure 14 and is used to drive the oil pump 8 to work. In order to ensure that most of the cooling oil can enter the first oil passage through the groove structure 14, in this embodiment, a gap of 3 mm to 6 mm is reserved between the transmission shaft of the oil pump 8 and the bottom wall of the groove structure 14.

[0076] In this embodiment, the stator assembly 2 is at least partially located in the oil cavity, so that the cooling oil in the oil cavity can immerse a portion of the stator assembly 2, thereby cooling the lower half of the stator assembly 2 and further improving the cooling effect of the stator assembly 2.

[0077] This embodiment also provides a car, comprising any one of the above oil-cooled generators.

[0078] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. An oil-cooled generator, comprising a rotor assembly and a stator assembly, wherein the stator assembly is sleeved outside the rotor assembly, characterized in that: It also includes: A storage box; the bottom of the storage box has an oil cavity; the rotor assembly and the stator assembly are both located in the storage box; an oil passage, disposed in the rotor assembly and communicating with the oil chamber; The oil outlet hole is extended from the axial end surface of the rotor assembly toward the inside of the rotor assembly and is communicated with the oil passage.

2. The oil-cooled generator according to claim 1, characterized in that: The rotor assembly comprises: A rotor shaft; a first oil passage is provided in the rotor shaft; a rotor hub, sleeved on the rotor shaft; a second oil passage is arranged in the rotor hub, the second oil passage is communicated with the first oil passage, and forms the oil passage; the oil outlet hole is arranged on the rotor hub; The motor rotor is sleeved on the rotor hub.

3. The oil-cooled generator according to claim 1, characterized in that: It also includes: An oil supply pipe, arranged outside the stator assembly and connected to the oil chamber; A plurality of spray pipes are distributed on the periphery of the stator assembly along the circumferential direction of the stator assembly; the spray pipes are connected to the oil supply pipe.

4. The oil-cooled generator according to claim 3, characterized in that: The diameter of the inlet end of the oil passage is smaller than the diameter of the inlet end of the oil supply pipe.

5. The oil-cooled generator according to claim 3, characterized in that: It also includes: A filter is disposed in the receiving box and communicated with the oil chamber; An oil pump, disposed at the outlet of the filter; The oil cooling assembly is arranged at the outlet of the oil pump and is communicated with the oil passage and the oil supply pipe respectively.

6. The oil-cooled generator according to claim 3, characterized in that: Among the multiple spray pipes, the number of the spray pipes distributed above the center line of the stator assembly is greater than the number of the spray pipes distributed below the center line of the stator assembly.

7. The oil-cooled generator according to claim 6, characterized in that: The number of the spray pipes distributed above the center line of the stator assembly accounts for 70% to 80% of the total number of the spray pipes.

8. The oil-cooled generator according to claim 1, characterized in that: It also includes: A bearing assembly, sleeved on the rotor assembly; Assembly gap; a portion of the receiving box is sleeved on the rotor assembly from one side of the rotor assembly close to the bearing assembly The assembly gap is located between the receiving box and the rotor assembly and is connected to the oil passage to drain the cooling oil to the bearing assembly.

9. The oil-cooled generator according to claim 1, characterized in that: The stator assembly is at least partially located within the oil cavity.

10. An automobile, characterized in that: It comprises an oil-cooled generator as claimed in any one of claims 1 to 9.

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