Stator assembly, motor, electric assembly and vehicle

Abstract

The present invention discloses a stator assembly, a motor, an electric assembly and a vehicle, wherein the stator assembly comprises: a stator core and a stator oil circuit, wherein the stator core is provided with a first oil channel, wherein the first oil channel is provided with a first inlet and a second inlet; wherein the stator oil circuit is provided with a stator oil inlet, wherein the stator oil circuit is connected to the first inlet, wherein the stator oil circuit is connected to the second inlet, and wherein the oil inlet pressure of the second inlet is lower than the oil inlet pressure of the first inlet. Thus, the stator oil circuit can inject lubricating oil into the first oil channel through the first inlet and the second inlet respectively, so that the lubricating oil in the first oil channel is evenly distributed, thereby ensuring that the first oil channel is not prone to forming a cooling dead zone, and improving the temperature uniformity of the stator assembly.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a stator assembly, a motor, an electric assembly and a vehicle. Background Art

[0002] As new energy electric drive assemblies develop towards high speed, high power and high integration, the lubrication and cooling of motors and reducers have become key factors that limit motor performance and affect the efficient and long-term operation of electric drive assemblies. In related technologies, the yoke of the stator core is designed with a stator oil channel. The main oil circuit supplies oil to the stator oil channel through an oil inlet located in the middle or end of the stator along the axial direction. The flow rate of the stator oil channel far from the oil inlet is insufficient, and there is a cooling dead zone. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a stator assembly, wherein the lubricating oil in the first oil passage is evenly distributed to ensure that the first oil passage is not prone to forming a cooling dead zone, thereby improving the temperature uniformity of the stator assembly.

[0004] According to an embodiment of the present invention, the stator assembly includes: a stator core, the stator core is provided with a first oil channel, the first oil channel is provided with a first inlet and a second inlet; a stator oil circuit, the stator oil circuit is provided with a stator oil inlet, the stator oil circuit is connected to the first inlet, the stator oil circuit is connected to the second inlet, and the oil inlet pressure of the second inlet is lower than the oil inlet pressure of the first inlet.

[0005] According to the stator assembly of the embodiment of the present invention, by providing the first inlet and the second inlet on the first oil channel, the stator oil circuit can inject lubricating oil into the first oil channel through the first inlet and the second inlet respectively, so that the lubricating oil in the first oil channel is evenly distributed, which can ensure that the first oil channel is not prone to form a cooling dead zone, and by providing a pressure difference between the first inlet and the second inlet, it can be ensured that the portion of the first oil channel located between the first inlet and the second inlet will not form a cooling dead zone, thereby improving the temperature uniformity of the stator assembly.

[0006] According to the stator assembly of some embodiments of the present invention, a flow cross-sectional area of ​​the first inlet is smaller than a flow cross-sectional area of ​​the second inlet.

[0007] According to some embodiments of the present invention, the stator assembly further includes a first valve, which is arranged in the stator oil circuit and located between the first inlet and the second inlet, and the first inlet is located between the second inlet and the stator oil inlet.

[0008] The stator assembly according to some embodiments of the present invention further includes a first valve, and the stator oil circuit is connected to the second inlet through the first valve.

[0009] According to the stator assembly of some embodiments of the present invention, the second inlet is arranged on a side of the first inlet away from the stator oil inlet.

[0010] According to the stator assembly of some embodiments of the present invention, the stator oil circuit is connected to the second inlet through a first pipeline, and the first valve is provided in the first pipeline.

[0011] According to some embodiments of the present invention, the stator assembly further includes a first oil injection ring and a second oil injection ring located at the axial ends of the stator core, an oil injection cavity is formed in the first oil injection ring and the second oil injection ring, the first oil channel extends along the axial direction of the stator core, the first oil channel is connected to the oil injection cavity of the first oil injection ring and the second oil injection ring, respectively, and the radial inner sides of the first oil injection ring and the second oil injection ring are provided with oil injection ports connected to the oil injection cavity.

[0012] According to some embodiments of the stator assembly of the present invention, the stator assembly includes a stator winding, and the stator winding includes winding end portions located on both axial sides of the stator core, one of the winding end portions is located radially inside the first oil injection ring and opposite to a portion of the oil injection ports on the first oil injection ring, and the other winding end portion is located radially inside the second oil injection ring and opposite to a portion of the oil injection ports on the second oil injection ring.

[0013] According to some embodiments of the stator assembly of the present invention, the winding end includes a welding end and a hairpin end, the welding end is located radially inside the first fuel injection ring and opposite to a portion of the fuel injection ports on the first fuel injection ring, the hairpin end is located radially inside the second fuel injection ring and opposite to a portion of the fuel injection ports on the second fuel injection ring, and the total opening area of ​​the fuel injection ports of the first fuel injection ring is greater than the total opening area of ​​the fuel injection ports of the second fuel injection ring.

[0014] According to the stator assembly of some embodiments of the present invention, the first fuel injection ring is provided with a first circle of fuel injection ports and a second circle of fuel injection ports, the first circle of fuel injection ports is located on the side of the second circle of fuel injection ports away from the stator core and is arranged opposite to the welding position of the welding end, and the total opening area of ​​the first circle of fuel injection ports is greater than the total opening area of ​​the second circle of fuel injection ports.

[0015] According to the stator assembly of some embodiments of the present invention, the number of the first circle of fuel injection ports is greater than the number of the second circle of fuel injection ports.

[0016] According to the stator assembly of some embodiments of the present invention, the stator oil circuit includes a stator main oil circuit, the stator main oil circuit extends along the axial direction of the stator core, the stator main oil circuit is provided with the stator oil inlet, the stator main oil circuit is connected with the first inlet, and the stator main oil circuit is connected with the second inlet through a first valve so that the oil inlet pressure of the second inlet is lower than the oil inlet pressure of the first inlet.

[0017] According to the stator assembly of some embodiments of the present invention, the stator oil circuit also includes a first cooling oil circuit, the first cooling oil circuit is connected to the stator main oil circuit, the first cooling oil circuit is located at the axial end of the stator core, and the first cooling oil circuit is provided with a first outlet suitable for spraying oil toward the motor bearing.

[0018] According to the stator assembly of some embodiments of the present invention, the first cooling oil circuit is correspondingly provided on both axial sides of the stator core.

[0019] The invention also provides a motor.

[0020] The motor according to an embodiment of the present invention comprises: a stator assembly and a rotor assembly, wherein the stator assembly is the stator assembly according to any of the above embodiments; and the rotor assembly is coupled to the stator assembly to rotate relative to the stator assembly.

[0021] According to the motor of the embodiment of the present invention, the stator assembly is not prone to forming a cooling dead zone and has good temperature uniformity, which can reduce the probability of ablation of the motor due to local overheating and improve the reliability of the motor.

[0022] According to some embodiments of the motor of the present invention, the rotor assembly includes a rotor shaft, a rotor core and a rotor oil circuit, the rotor core is arranged around the rotor shaft, and at least a portion of the rotor oil circuit is arranged on the rotor core to at least cool the rotor core.

[0023] In the motor according to some embodiments of the present invention, the rotor oil circuit includes a second outlet located at an axial end of the rotor core, and in the radial direction of the rotor shaft, the second outlet is arranged corresponding to the stator assembly to discharge oil toward the stator assembly.

[0024] According to some embodiments of the motor of the present invention, the rotor oil circuit includes a rotor main oil circuit and a plurality of branch oil circuits, the rotor main oil circuit is arranged on the rotor shaft, the plurality of branch oil circuits are arranged on the rotor core and are arranged at circumferential intervals along the rotor shaft, the plurality of branch oil circuits are respectively connected to the rotor main oil circuit, and each of the branch oil circuits is provided with the second outlet.

[0025] In the motor according to some embodiments of the present invention, in the axial direction of the rotor shaft, a first connecting oil circuit is provided at the first end of the rotor main oil circuit and a second connecting oil circuit is provided at the second end, the first connecting oil circuit being used to connect a part of the branch oil circuit with the rotor main oil circuit, and the second connecting oil circuit being used to connect another part of the branch oil circuit with the rotor main oil circuit.

[0026] According to some embodiments of the motor of the present invention, the branch oil circuit connected to the first connecting oil circuit is a first branch oil circuit, and the branch oil circuit connected to the second connecting oil circuit is a second branch oil circuit. In the circumferential direction of the rotor shaft, the first branch oil circuit and the second branch oil circuit are alternately arranged.

[0027] According to some embodiments of the present invention, the motor includes a main oil inlet pipe, the main oil inlet pipe is provided with a main oil inlet port, and the main oil inlet pipe is connected to the stator oil circuit and the rotor oil circuit respectively.

[0028] In the motor according to some embodiments of the present invention, the stator oil circuit and / or the rotor oil circuit is provided with a regulating valve for distributing flow.

[0029] The present invention further provides an electric assembly.

[0030] An electric assembly according to an embodiment of the present invention includes a motor according to any of the above embodiments.

[0031] According to the electric assembly of the embodiment of the present invention, the probability of ablation of the motor due to local overheating is low, the reliability is high, and it is beneficial to improve the working stability of the electric assembly.

[0032] The present invention further provides a vehicle.

[0033] A vehicle according to an embodiment of the present invention comprises an electric assembly according to any one of the above embodiments.

[0034] According to the vehicle of the embodiment of the present invention, the probability of ablation of the motor due to local overheating is low, the reliability is high, and it is beneficial to improve the working stability of the electric assembly, thereby reducing the failure rate of the vehicle and improving user satisfaction.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 is a simulated schematic diagram of an oil circuit of a motor according to an embodiment of the present invention;

[0038] Figure 2 is a simulated schematic diagram of an oil circuit of a stator assembly according to an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of the installation of a stator core and an oil injection ring according to an embodiment of the present invention;

[0040] Figure 4 Schematic diagram of a simulation of the oil circuit of the rotor assembly according to an embodiment of the present invention.

[0041] Reference numerals:

[0042] Motor 100,

[0043] stator assembly 1, stator core 11, first oil passage 111, first inlet 1111, second inlet 1112,

[0044] stator oil circuit 12, stator main oil circuit 121, stator oil inlet 1211, first cooling oil circuit 122, first outlet 1221,

[0045] The first valve 13, the first oil injection ring 141, the second oil injection ring 142, the oil injection port 143, the first circle of oil injection ports 144, the second circle of oil injection ports 145, the first pipeline 15,

[0046] Rotor assembly 2, rotor oil circuit 21, rotor main oil circuit 211, branch oil circuit 212, first branch oil circuit 2121, second branch oil circuit 2122, second outlet 213, first connecting oil circuit 214, second connecting oil circuit 215,

[0047] Main oil inlet pipe 3, main oil inlet port 31, regulating valve 4. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Hereinafter, a stator assembly 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0052] like Figure 1-Figure 4 As shown, the stator assembly 1 according to the embodiment of the present invention includes: a stator core 11 and a stator oil circuit 12, the stator core 11 is provided with a first oil channel 111, the first oil channel 111 is provided with a first inlet 1111 and a second inlet 1112, the stator oil circuit 12 is provided with a stator oil inlet 1211, the stator oil circuit 12 is connected with the first inlet 1111, the stator oil circuit 12 is connected with the second inlet 1112, and the oil inlet pressure of the second inlet 1112 is lower than the oil inlet pressure of the first inlet 1111.

[0053] Thus, the lubricating oil in the first oil channel 111 can be evenly distributed to ensure that the first oil channel 111 is not prone to forming a cooling dead zone when the lubricating oil flow is insufficient, thereby improving the temperature uniformity of the stator assembly 1.

[0054] First, if Figure 1-Figure 2 As shown, the motor 100 includes a casing, a stator assembly 1 and a rotor assembly 2. The stator assembly 1 is arranged around the rotor assembly 2. The stator assembly 1 is provided with a stator winding. The rotor assembly is provided with a permanent magnet. The stator winding is used to couple with the permanent magnet so that the stator assembly 1 can drive the rotor assembly 2 to rotate relative to the rotor assembly 2. The casing is sleeved on the outside of the stator assembly 1.

[0055] The stator assembly 1 further includes a stator core 11 and a stator oil passage 12. The stator winding is mounted on the stator core 11. A first oil passage 111 is provided in the stator core 11. The first oil passage 111 is axially extending from the stator core 11 (refer to Figure 1 The first oil passage 111 extends in the front-to-rear direction (as shown) to penetrate the stator core 11, and a first inlet 1111 and a second inlet 1112 are respectively provided at both ends of the first oil passage 111.

[0056] Of course, an oil channel groove may also be provided on the outer peripheral wall of the stator core 11 so that the stator core 11 and the inner wall of the casing can define a first oil channel 111 at the oil channel groove, and the present invention is not limited to this.

[0057] The stator oil circuit 12 is integrated in the housing, and is provided with a stator oil inlet 1211, which is communicated with an external oil circuit, so that the external oil circuit can inject lubricating oil from the stator oil inlet 1211 into the stator oil circuit 12. The stator oil circuit 12 is communicated with a first inlet 1111, and the stator oil circuit 12 is communicated with a second inlet 1112, and the oil inlet pressure of the second inlet 1112 is lower than the oil inlet pressure of the first inlet 1111.

[0058] Exemplarily, the stator oil circuit 12 may be connected to the second inlet 1112 via a first valve 13 , and the first valve 13 is used to reduce the pressure of the lubricating oil flowing to the second inlet 1112 so that the oil inlet pressure of the second inlet 1112 is lower than the oil inlet pressure of the first inlet 1111 .

[0059] It can be understood that by providing the first inlet 1111 and the second inlet 1112 on the first oil passage 111, the stator oil circuit 12 can inject lubricating oil into the first oil passage 111 through the first inlet 1111 and the second inlet 1112 respectively. Compared with the design of a single inlet, more lubricating oil can enter the first oil passage 111, which can increase the cooling flow of the stator assembly and make the distribution of the lubricating oil more uniform, thereby avoiding the formation of cooling dead zones in the first oil passage 111 and components connected to the first oil passage 111 (such as the first oil injection ring 141 and the second oil injection ring 142 described below).

[0060] At the same time, by setting a pressure difference between the first inlet 1111 and the second inlet 1112, the lubricating oil at the first inlet 1111 can flow along the first oil channel 111 to the second inlet 1112, thereby preventing the part of the first oil channel 111 located between the first inlet 1111 and the second inlet 1112 from being trapped in the oil to form a cooling dead zone.

[0061] It should be noted that the cooling dead zone means that there is no lubricating oil in this area or the flow rate of the lubricating oil is close to zero (or equal to zero), and the lubricating oil cannot effectively cool this area. During continuous operation, the temperature of this area will continue to rise, and then cause faults, such as burning of the stator winding.

[0062] According to the stator assembly 1 of the embodiment of the present invention, by providing a first inlet 1111 and a second inlet 1112 on the first oil channel 111, the stator oil circuit 12 can inject lubricating oil into the first oil channel 111 through the first inlet 1111 and the second inlet 1112 respectively, so that the lubricating oil in the first oil channel 111 is evenly distributed, which can ensure that the first oil channel 111 is not prone to form a cooling dead zone, and by providing a pressure difference between the first inlet 1111 and the second inlet 1112, it can be ensured that the portion of the first oil channel 111 located between the first inlet 1111 and the second inlet 1112 will not form a cooling dead zone, thereby improving the temperature uniformity of the stator assembly 1.

[0063] In some embodiments of the present invention, the flow cross-sectional area of ​​the first inlet 1111 may be set smaller than the flow cross-sectional area of ​​the second inlet 1112. It should be noted that, when the flow rate remains unchanged, the larger the flow cross-sectional area, the smaller the pressure. By setting the flow cross-sectional area of ​​the first inlet 1111 smaller than the flow cross-sectional area of ​​the second inlet 1112, the pressure of the first inlet 1111 may be greater than the pressure of the second inlet 1112, so that there is a pressure difference between the first inlet 1111 and the second inlet 1112. As a result, there is no need to set a pressure reducing valve, which is conducive to simplifying the oil circuit and reducing the cost of the stator assembly 1.

[0064] In some embodiments of the present invention, the stator assembly 1 of the embodiment of the present invention further includes a first valve 13, which is arranged on the stator oil circuit 12 and located between the first inlet 1111 and the second inlet 1112, and the first inlet 1111 is located between the second inlet 1112 and the stator oil inlet 1211, and the lubricating oil can flow in from the stator oil inlet 1211 and flow through the first inlet 1111 and the second inlet 1112 in sequence.

[0065] That is to say, in the flow direction of the oil, the first valve 13 is arranged between the portion of the stator oil circuit 12 corresponding to the first inlet 1111 and the portion corresponding to the second inlet 1112, and the portion of the stator oil circuit 12 corresponding to the second inlet 1112 is located downstream of the first valve 13. The first valve 13 is used to reduce the pressure of the lubricating oil flowing to the portion of the stator oil circuit 12 corresponding to the second inlet 1112, so as to reduce the oil inlet pressure of the second inlet 112, so that there can be a pressure difference between the first inlet 1111 and the second inlet 1112. In this way, the decompression effect can be ensured, and the reliability of the stator assembly 1 is improved.

[0066] Furthermore, a second valve may be provided between the stator oil passage 12 and the second inlet 1112, and the second valve is used to further reduce the oil inlet pressure of the second inlet 1112. Thus, it is ensured that the stator oil passage 12 can input lubricating oil to the first oil passage 111 through the second inlet 1112, and the pressure difference between the first inlet 1111 and the second inlet 1112 can be increased to increase the flow rate of the lubricating oil in the first oil passage 111 and improve the cooling effect.

[0067] In some embodiments of the present invention, the stator assembly 1 of the embodiment of the present invention further includes a first valve 13, the stator oil circuit 12 is connected to the second inlet 1112 through the first valve 13, and the first valve 13 is used to reduce the pressure of the lubricating oil flowing to the second inlet 1112, so that the oil inlet pressure of the second inlet 1112 is lower than the oil inlet pressure of the first inlet 1111. In this way, the decompression effect can be ensured, and the reliability of the stator assembly 1 is improved.

[0068] It should be noted that the first valve 13 and the second valve can be configured as pressure reducing valves or other valve bodies with a pressure reducing function, such as mechanical one-way valves.

[0069] In some embodiments of the present invention, Figure 2 As shown, the second inlet 1112 can be located on the side of the first inlet 1111 away from the stator oil inlet 1211, that is, the second inlet 1112 is located downstream of the first inlet 1111. In this way, the flow direction of the lubricating oil in the first oil channel 111 can be kept consistent with the flow direction of the lubricating oil in the stator oil passage 12, which is beneficial to improving the flow stability of the lubricating oil, shortening the flow path of the lubricating oil, and eliminating the cooling dead zone.

[0070] In some embodiments of the present invention, Figure 2 As shown, the stator oil circuit 12 is connected to the second inlet 1112 through the first pipe 15, and the first valve 13 is provided on the first pipe 15. Through the above arrangement, the stator oil circuit 12 and the second inlet 1112 can be directly connected through the first valve 13, which is conducive to simplifying the structure, reducing the connection difficulty, and making the arrangement of the stator oil circuit 12 more flexible, thereby improving the design rationality of the stator assembly 1.

[0071] In some embodiments of the present invention, the stator assembly 1 according to the embodiment of the present invention further includes a first oil injection ring 141 and a second oil injection ring 142 located at both axial ends of the stator core 11, and the first oil channel 111 extends along the axial direction of the stator core 11. The first oil channel 111 is connected to the first oil injection ring 141 and the second oil injection ring 142 respectively, and the first oil injection ring 141 and the second oil injection ring 142 both have oil injection ports 143.

[0072] For example, refer to Figure 2-Figure 3As shown, the stator assembly 1 further includes a first oil injection ring 141 and a second oil injection ring 142, which are respectively located at the axial ends of the stator core 11 and are fixedly connected to the stator core 11. Oil injection chambers are respectively formed in the first oil injection ring 141 and the second oil injection ring 142, and the first oil channel 111 extends along the axial direction of the stator core 11. One end of the first oil channel 111 is connected to the oil injection chamber of the first oil injection ring 141, and the other end of the first oil channel 111 is connected to the oil injection chamber of the second oil injection ring 142. At the same time, oil injection ports 143 can be respectively provided on the radial inner side of the first oil injection ring 141 and the radial inner side of the second oil injection ring 142, and the oil injection ports 143 are connected to the oil injection chamber.

[0073] It should be noted that the oil injection cavity of the first oil injection ring 141 (or the second oil injection ring 142 ) may be defined jointly by the first oil injection ring 141 (or the second oil injection ring 142 ) and the stator core 11 .

[0074] For example, the first oil injection ring 141 may be arranged close to the first inlet 1111, and the second oil injection ring 142 may be arranged close to the second inlet 1112. After the lubricating oil flows into the stator oil passage 12, the lubricating oil may flow along the first oil passage 111 and be divided into at least two parts, one part of the lubricating oil may flow into the first oil passage 111 through the first inlet 1111, and the other part may flow into the first oil passage 111 through the second inlet 1112; one part of the lubricating oil flowing into the first oil passage 111 from the first inlet 1111 may flow into the first oil injection ring 141 to be sprayed toward the stator winding from the oil injection port 143 of the first oil injection ring 141, and the other part may flow along the first oil passage 111 to the second inlet 1112 and merge with the lubricating oil flowing into the second inlet 1112, and the merged lubricating oil may flow into the second oil injection ring 142 together to be sprayed toward the stator winding from the oil injection port 143 of the second oil injection ring 142.

[0075] Through the above arrangement, the first oil injection ring 141 and the second oil injection ring 142 can spray oil to the stator winding from both axial ends, so that the lubricating oil can contact and cool the stator winding, which is beneficial to improving the cooling efficiency of the stator winding and improving the working stability of the stator assembly 1.

[0076] In some embodiments of the present invention, the first inlet 1111 may be connected to the first oil injection ring 141 or the second oil injection ring 142. For example, Figure 2As shown, the first inlet 1111 can be connected to the first oil injection ring 141. After the lubricating oil flows into the stator oil circuit 12, the lubricating oil can flow along the first oil channel 111 and be divided into at least two parts. One part of the lubricating oil flows into the first oil injection ring 141 through the first inlet 1111, and the other part flows into the first oil channel 111 through the second inlet 1112; one part of the lubricating oil flowing into the first oil injection ring 141 can be sprayed toward the stator winding from the first oil injection port 143, and the other part can flow along the first oil channel 111 to the second inlet 1112 and merge with the lubricating oil flowing into the second inlet 1112. The merged lubricating oil can flow into the second oil injection ring 142 together to be sprayed toward the stator winding from the oil injection port 143 of the second oil injection ring 142.

[0077] Through the above arrangement, the lubricating oil can flow unidirectionally in the first oil channel 111, which is conducive to eliminating turbulence, improving the flow stability of the lubricating oil, and improving the cooling efficiency of the stator assembly.

[0078] In some embodiments of the present invention, the stator assembly 1 includes a stator winding, which includes winding ends located on both axial sides of the stator core 11, one of the winding ends is located radially inside the first oil injection ring 141 and opposite to the oil injection port 143 on a portion of the first oil injection ring 141, and the other winding end is located radially inside the second oil injection ring 142 and opposite to the oil injection port 143 on a portion of the second oil injection ring 142.

[0079] It should be noted that the winding end is opposite to the oil injection port 143 on part of the first oil injection ring 141 (or the second oil injection ring 142), which is not limited to the oil injection port 143 being directly opposite to the winding end along the radial direction of the first oil injection ring 141 (or the second oil injection ring 142). As long as the lubricating oil sprayed from the oil injection port 143 can contact the winding end, it is considered to be opposite.

[0080] Through the above arrangement, lubricating oil can be directly sprayed on the stator winding so that the lubricating oil can directly cool the heat source, which is beneficial to improving the cooling efficiency.

[0081] In some embodiments of the present invention, the winding end includes a welding end and a hairpin end, the welding end is located radially inside the first fuel injection ring 141 and opposite to the fuel injection port 143 on the first fuel injection ring 141, the hairpin end is located radially inside the second fuel injection ring 142 and opposite to the fuel injection port 143 on the second fuel injection ring 142, and the total opening area of ​​the fuel injection ports 143 of the first fuel injection ring 141 is greater than the total opening area of ​​the fuel injection ports 143 of the second fuel injection ring 142.

[0082] For example, refer to Figure 2-Figure 3As shown, the winding end includes a welding end and a hairpin end, the welding end and the hairpin end are respectively located at both sides of the axial direction of the stator core 11, the welding end can extend to the radial inner side of the first oil injection ring 141 and face the oil injection port 143 of the first oil injection ring 141, and the hairpin end can extend to the radial inner side of the second oil injection ring 142 and face the oil injection port 143 of the second oil injection ring 142. The total opening area of ​​the oil injection port 143 of the first oil injection ring 141 can be set to be greater than the total opening area of ​​the oil injection port 143 of the second oil injection ring 142.

[0083] Through the above arrangement, more lubricating oil can be sprayed toward the welding end in a targeted manner to ensure the cooling efficiency of the welding end, thereby improving the temperature uniformity of the stator winding.

[0084] In some embodiments of the present invention, the first fuel injection ring 141 is provided with a first circle of fuel injection ports 144 and a second circle of fuel injection ports 145. The first circle of fuel injection ports 144 is located on the side of the second circle of fuel injection ports 145 away from the stator core 11 and is arranged opposite to the welding position of the welding end. The total opening area of ​​the first circle of fuel injection ports 144 is greater than the total opening area of ​​the second circle of fuel injection ports 145.

[0085] For example, Figure 2-Figure 3 As shown, the first oil injection ring 141 is provided with a first circle of oil injection ports 144 and a second circle of oil injection ports 145, and both the first circle of oil injection ports 144 and the second circle of oil injection ports 145 have a plurality of oil injection ports 143 spaced apart in the circumferential direction. The first circle of oil injection ports 144 is located on the side of the second circle of oil injection ports 145 away from the stator core 11, and the first circle of oil injection ports 144 is arranged relative to the welding position of the welding end, so that the first oil injection ring 141 can spray lubricating oil toward the welding position of the welding end through the first circle of oil injection ports 144, and the second circle of oil injection ports 145 is arranged relative to the portion of the welding end adjacent to the welding position, so that the first oil injection ring 141 can spray lubricating oil toward the portion of the welding end adjacent to the welding position through the second circle of oil injection ports 145. Among them, the total opening area of ​​the first circle of oil injection ports 144 can be set to be greater than the total opening area of ​​the second circle of oil injection ports 145.

[0086] It should be noted that the first circle of oil injection ports 144 is arranged relative to the welding position of the welding end, which is not limited to the first circle of oil injection ports 144 being directly opposite to the welding position of the winding end along the radial direction of the first oil injection ring 141. As long as the lubricating oil sprayed by the first circle of oil injection ports 144 can contact the welding position of the winding end, it is considered relative. The arrangement of the second circle of oil injection ports 145 is similar, and will not be described in detail here.

[0087] It can be understood that by providing the first oil injection ring 141 with a first circle of oil injection ports 144 and a second circle of oil injection ports 145, the injection range of the lubricating oil can be increased, thereby improving the cooling efficiency of the welded end. In addition, by providing the total opening area of ​​the first circle of oil injection ports 144 to be greater than the total opening area of ​​the second circle of oil injection ports 145, the welding position of the welded end can be cooled in a targeted manner, thereby improving the temperature uniformity of the stator winding.

[0088] In some embodiments of the present invention, Figure 3 As shown, the number of the first circle of oil injection ports 144 can be set to be greater than the number of the second circle of oil injection ports 145. For example, the number of the first circle of oil injection ports 144 can be set to be twice the number of the second circle of oil injection ports 145. In this way, the types of tools required for processing the oil injection ports 143 can be reduced, and the processing difficulty and processing cost can be reduced.

[0089] Of course, the opening area of ​​the first circle of oil injection ports 144 may be set larger than the opening area of ​​the second circle of oil injection ports 145. Thus, the difficulty of positioning the oil injection ports 143 can be reduced and the processing accuracy of the oil injection ports 143 can be improved.

[0090] In some embodiments of the present invention, Figure 2 As shown, the stator oil circuit 12 includes a stator main oil circuit 121, which extends along the axial direction of the stator core 11. The stator main oil circuit 121 is provided with a stator oil inlet 1211. The stator main oil circuit 121 is connected to the first inlet 1111. The stator main oil circuit 121 is connected to the second inlet 1112 through the first valve 13 so that the oil inlet pressure of the second inlet 1112 is lower than the oil inlet pressure of the first inlet 1111.

[0091] Through the above arrangement, the structural complexity of the stator oil circuit 12 can be reduced, the processing difficulty can be reduced, and the length of the stator oil circuit 12 can be shortened, the flow path can be shortened, and the flow resistance can be reduced to increase the flow speed of the lubricating oil.

[0092] In some embodiments of the present invention, the stator oil circuit 12 also includes a first cooling oil circuit 122, which is connected to the stator main oil circuit 121. The first cooling oil circuit 122 is located at the axial end of the stator core 11, and the first cooling oil circuit 122 is provided with a first outlet 1221 suitable for spraying oil toward the motor bearing.

[0093] For example, refer to Figure 1-Figure 2As shown, the motor 100 further includes a motor bearing, which is provided with two motor bearings, which are respectively located at both ends of the stator core 11 along the length direction and are used to support the rotor assembly 2 to improve the rotation stability of the rotor assembly 2. The stator oil circuit 12 further includes a first cooling oil circuit 122, which is located at the axial end of the stator core 11, and extends in the radial direction of the stator core 11. One end of the first cooling oil circuit 122 is connected to the stator main oil circuit 121 and the other end is formed with a first outlet 1221, which is opposite to the motor bearing and is used to spray lubricating oil toward the motor bearing.

[0094] Through the above arrangement, the motor bearings can be lubricated and cooled to improve the working stability of the motor bearings, thereby improving the reliability of the stator assembly 1.

[0095] Furthermore, if Figure 2 As shown, first cooling oil circuits 122 can be provided on both axial sides of the stator core 11. Through the above arrangement, the first cooling oil circuits 122 can spray lubricating oil to the motor bearings located on both axial sides, thereby ensuring the lubrication and cooling effect and improving the reliability of the stator assembly 1.

[0096] The present invention also provides a motor 100 .

[0097] like Figure 1 As shown, the motor 100 according to an embodiment of the present invention includes: a casing, a stator assembly 1 and a rotor assembly 2, wherein the stator assembly 1 is the stator assembly 1 according to any of the above embodiments; the stator assembly 1 and the rotor assembly 2 are both arranged in the casing, the stator assembly 1 is sleeved on the outside of the rotor assembly 2, and the rotor assembly 2 is coupled to the stator assembly 1 to rotate relative to the stator assembly 1.

[0098] In the embodiment of the present invention, the coupling of the stator assembly 1 and the rotor assembly 2 refers to the interaction between the magnetic field generated on the stator assembly 1 and the magnetic field on the rotor assembly 2, so that the rotor assembly 2 can rotate under the magnetic field of the stator assembly 1. Exemplarily, the stator assembly 1 is provided with a energized winding, which generates a first magnetic field by the principle of electromagnetism, and the rotor assembly 2 is provided with a permanent magnet, which generates a second magnetic field on the rotor assembly 2, and the first magnetic field and the second magnetic field interact with each other, so that the stator assembly 1 and the rotor assembly 2 are coupled.

[0099] According to the motor 100 of the embodiment of the present invention, the stator assembly 1 is not prone to forming a cooling dead zone and has good temperature uniformity, which can reduce the probability of ablation of the motor 100 due to local overheating and improve the reliability of the motor 100.

[0100] In some embodiments of the present invention, Figure 1 and Figure 4As shown, the rotor assembly 2 may include a rotor shaft, a rotor core (not shown) and a rotor oil circuit 21. The rotor core is arranged around the rotor shaft. At least part of the rotor oil circuit 21 is arranged in the rotor core. The rotor oil circuit 21 is used to circulate lubricating oil to at least cool the rotor core. Thus, the rotor assembly 2 may be effectively cooled to control the overall temperature uniformity of the motor 100, thereby improving the working stability of the motor 100.

[0101] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, the rotor oil circuit 21 includes a second outlet 213 , which is located at the axial end of the rotor core. In the radial direction of the rotor shaft, the second outlet 213 is arranged corresponding to the stator assembly 1 to discharge oil toward the stator assembly 1 .

[0102] Specifically, when the motor 100 starts to run, the lubricating oil can flow into the rotor oil passage 21 to cool the rotor core. At this time, as the rotor core rotates, the lubricating oil can be thrown outward from the second outlet 213, so that the lubricating oil can be sprayed onto the inner side of the stator winding, thereby cooling the stator winding. In this way, the temperature uniformity of the stator winding can be improved, and the reliability of the motor 100 can be improved.

[0103] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, the rotor oil circuit 21 includes a rotor main oil circuit 211 and a branch oil circuit 212. The rotor main oil circuit 211 is arranged on the rotor shaft and along the axial direction of the rotor shaft (refer to Figure 4 The branch oil circuit 212 is arranged in the rotor core, and there are multiple branch oil circuits 212. The multiple branch oil circuits 212 are arranged at intervals along the circumference of the rotor shaft. The multiple branch oil circuits 212 are respectively connected to the rotor main oil circuit 211, and each branch oil circuit 212 is provided with a second outlet 213. In this way, the lubricating oil in the rotor main oil circuit 211 can be diverted to the multiple branch oil circuits 212, and the lubricating oil flowing into the branch oil circuit 212 can be sprayed toward the stator assembly 1 through the second outlet 213.

[0104] It can be understood that by distributing the lubricating oil into multiple branch oil circuits 212, the multiple branch oil circuits 212 can cool the rotor core from different positions, thereby achieving sufficient cooling of the rotor core and improving the cooling effect of the lubricating oil on the stator winding, thereby improving the overall temperature uniformity of the motor 100.

[0105] In some embodiments of the present invention, Figure 4As shown, each branch oil circuit 212 may be provided with a plurality of second outlets 213, and the plurality of second outlets 213 of the same branch oil circuit 212 may be arranged spaced apart along the circumferential direction of the rotor core. Thus, the lubricating oil sprayed from the branch oil circuit 212 may be made more uniform, the temperature uniformity of the stator assembly 1 may be improved, and the branch oil circuit 212 may be less likely to be blocked, thereby improving the reliability of the rotor oil circuit 21.

[0106] In some embodiments of the present invention, Figure 4 As shown, the branch oil circuit 212 has a plurality of sub-oil circuits, which are arranged in parallel and spaced apart, and are respectively connected to the rotor main oil circuit 211, so that the lubricating oil flowing into the branch oil circuit 212 can be divided into the plurality of sub-oil circuits. Thus, the rotor core can be cooled more fully.

[0107] In some embodiments of the present invention, in the axial direction of the rotor shaft, a first connecting oil circuit 214 is provided at the first end of the rotor main oil circuit 211 and a second connecting oil circuit 215 is provided at the second end. The first connecting oil circuit 214 is used to connect a part of the branch oil circuit 212 and the rotor main oil circuit 211, and the second connecting oil circuit 215 is used to connect another part of the branch oil circuit 212 and the rotor main oil circuit 211.

[0108] For example, refer to Figure 1 and Figure 4 As shown, in the axial direction of the rotor shaft (reference Figure 4 In the front-to-back direction shown in the figure), the two ends of the rotor main oil circuit 211 can be set as the first end and the second end respectively, the first end of the rotor main oil circuit 211 is provided with a first connecting oil circuit 214, and the second end of the rotor main oil circuit 211 is provided with a second connecting oil circuit 215.

[0109] Among them, a first connecting oil circuit 214 can be set to connect a part of the branch oil circuit 212 with the rotor main oil circuit 211, and a second connecting oil circuit 215 can be set to connect another part of the branch oil circuit 212 with the rotor main oil circuit 211, so that the rotor main oil circuit 211 can inject lubricating oil toward the corresponding branch oil circuit 212 through the first connecting oil circuit 214 and the second connecting oil circuit 215 respectively.

[0110] Specifically, the first end may be set as the front end and the second end may be set as the rear end, and the first communication oil passage 214 is provided at the front end of the rotor main oil passage 211 and the second communication oil passage 215 is provided at the rear end. The first connecting oil circuit 214 is connected to the front end of a part of the branch oil circuit 212, and the rear end of the branch oil circuit 212 connected to the first connecting oil circuit 214 is provided with a second outlet 213, and the lubricating oil flowing into the branch oil circuit 212 from the first connecting oil circuit 214 can move from front to rear to fully cool the rotor core, and then the lubricating oil can be sprayed to the rear end of the stator core 11 through the second outlet 213 located at the rear end of the branch oil circuit 212; the second connecting oil circuit 215 is connected to the rear end of another part of the branch oil circuit 212, and the front end of the branch oil circuit 212 connected to the second connecting oil circuit 215 is provided with a second outlet 213, and the lubricating oil flowing into the branch oil circuit 212 from the second connecting oil circuit 215 can move from back to front to fully cool the rotor core, and then the lubricating oil can be sprayed to the front end of the stator core 11 through the second outlet 213 located at the front end of the branch oil circuit 212.

[0111] Through the above-mentioned arrangement, the temperature uniformity of the rotor core can be improved, and the lubricating oil in the rotor oil circuit 21 can cool the stator winding, thereby improving the temperature uniformity of the stator assembly, thereby ensuring the overall temperature uniformity of the motor 100, avoiding local overheating that may cause damage to the motor 100, and improving the reliability of the motor 100.

[0112] In some embodiments of the present invention, Figure 4 As shown, the branch oil circuit 212 connected to the first connecting oil circuit 214 is the first branch oil circuit 2121, and the branch oil circuit 212 connected to the second connecting oil circuit 215 is the second branch oil circuit 2122. In the circumferential direction of the rotor shaft, the first branch oil circuit 2121 and the second branch oil circuit 2122 are staggered and the internal oil flows in opposite directions. Thus, the temperature uniformity of the rotor core and the stator core 11 can be further improved, the temperature uniformity of the motor 100 as a whole is ensured, and the reliability of the motor 100 is improved.

[0113] In some embodiments of the present invention, the rotor core includes a body and magnetic isolation plates covering both sides of the body, and a first connecting oil path 214 and a second connecting oil path 215 are formed between the magnetic isolation plates and the body. Thus, the difficulty of forming the rotor core can be reduced.

[0114] In some embodiments of the present invention, Figure 1As shown, the motor 100 includes a main oil inlet pipe 3, which can be integrated on the housing, and is provided with a main oil inlet port 31, which is connected to the external flow path, and the main oil inlet pipe 3 is connected to the stator oil path 12 and the rotor oil path 21 respectively. Specifically, the external flow path can pass lubricating oil into the main oil inlet pipe 3 through the main oil inlet port 31, and the lubricating oil flowing into the main oil inlet pipe 3 can be divided into two parts, one part of which flows to the stator oil path 12, and the other part flows to the rotor oil path 21. As a result, the overall cooling system of the motor 100 can be simplified, and the structure of the motor 100 can be simplified.

[0115] In some embodiments of the present invention, Figure 1 As shown, the stator oil circuit 12 and / or the rotor oil circuit 21 are provided with a regulating valve 4 for adjusting the flow rate. It should be noted that when the rotation speed of the rotor assembly 2 increases, such as reaching 20,000 to 30,000 revolutions, the negative pressure of the rotor oil circuit 21 in the rotor assembly 2 is relatively large, the flow rate allocated to the rotor assembly 2 increases accordingly, and the lubricating oil flow rate in the stator assembly decreases accordingly, the stator assembly 1 is prone to overheating, and the power of the motor 100 will also be affected.

[0116] In view of the above problems, a regulating valve 4 may be provided on the stator oil circuit 12; or a regulating valve 4 may be provided on the rotor oil circuit 21; or a regulating valve 4 may be provided on the stator oil circuit 12 and the rotor oil circuit 21 respectively, and the present invention does not limit this. The regulating valve 4 is used to distribute the flow for different working conditions (such as boost charging, low-speed driving, high-speed driving, etc.) to ensure that both the stator assembly 1 and the rotor assembly 2 can be fully cooled.

[0117] For example, a regulating valve 4 may be provided on the rotor oil circuit 21, and the regulating valve 4 may be set as an electromagnetic proportional valve. When the rotation speed of the rotor assembly 2 increases, the opening of the regulating valve 4 may be reduced; and when the rotation speed of the rotor assembly 2 decreases, the opening of the regulating valve 4 may be increased.

[0118] Through the above-mentioned configuration, the flow demand of the stator assembly 1 can be met, overheating of the stator assembly 1 can be avoided, and the power loss of the motor 100 can be reduced, thereby improving the working efficiency of the motor 100.

[0119] The present invention further provides an electric assembly.

[0120] An electric assembly according to an embodiment of the present invention includes a motor 100 according to any one of the above embodiments.

[0121] According to the electric assembly of the embodiment of the present invention, the probability of ablation of the motor 100 due to local overheating is low, the reliability is high, and it is beneficial to improve the working stability of the electric assembly.

[0122] The present invention further provides a vehicle.

[0123] A vehicle according to an embodiment of the present invention comprises an electric assembly according to any one of the above embodiments.

[0124] According to the vehicle of the embodiment of the present invention, the probability of ablation of the motor 100 due to local overheating is low, the reliability is high, and it is beneficial to improve the working stability of the electric assembly, thereby reducing the failure rate of the vehicle and improving user satisfaction.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0126] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator assembly (1), characterized in that: include: A stator core (11), wherein the stator core (11) is provided with a first oil passage (111), and the first oil passage (111) is provided with a first inlet (1111) and a second inlet (1112); A stator oil circuit (12), the stator oil circuit (12) being provided with a stator oil inlet (1211), the stator oil circuit (12) being in communication with the first inlet (1111), the stator oil circuit (12) being in communication with the second inlet (1112), the oil inlet pressure of the second inlet (1112) being lower than the oil inlet pressure of the first inlet (1111); A first valve (13), the stator oil circuit (12) is connected to the second inlet (1112) via a first pipeline (15), and the first valve (13) is arranged on the first pipeline (15).

2. The stator assembly (1) according to claim 1, characterized in that: The flow cross-sectional area of ​​the first inlet (1111) is smaller than the flow cross-sectional area of ​​the second inlet (1112).

3. The stator assembly (1) according to claim 1, characterized in that: The stator oil passage (12) further comprises a first valve (13), wherein the first valve (13) is arranged on the stator oil passage (12) and is located between the first inlet (1111) and the second inlet (1112), and the first inlet (1111) is located between the second inlet (1112) and the stator oil inlet (1211).

4. The stator assembly (1) according to any one of claims 1 to 3, characterized in that: The second inlet (1112) is arranged on a side of the first inlet (1111) away from the stator oil inlet (1211).

5. The stator assembly (1) according to any one of claims 1 to 3, characterized in that: The stator core (11) further comprises a first oil injection ring (141) and a second oil injection ring (142) located at two axial ends of the stator core (11); an oil injection cavity is formed in the first oil injection ring (141) and the second oil injection ring (142); the first oil passage (111) is respectively connected to the oil injection cavity of the first oil injection ring (141) and the second oil injection ring (142); and radial inner sides of the first oil injection ring (141) and the second oil injection ring (142) are provided with oil injection ports (143) connected to the oil injection cavity.

6. The stator assembly (1) according to claim 5, characterized in that: The stator assembly (1) comprises a stator winding, wherein the stator winding comprises winding ends located on both axial sides of the stator core (11), wherein one winding end is located radially inwardly of the first oil injection ring (141) and is opposite to a portion of the oil injection ports (143) on the first oil injection ring (141), and the other winding end is located radially inwardly of the second oil injection ring (142) and is opposite to a portion of the oil injection ports (143) on the second oil injection ring (142).

7. The stator assembly (1) according to claim 6, characterized in that: The winding end comprises a welding end and a hairpin end, the welding end is located radially inside the first oil injection ring (141) and opposite to the oil injection port (143) on the first oil injection ring (141), the hairpin end is located radially inside the second oil injection ring (142) and opposite to the oil injection port (143) on the second oil injection ring (142), and the total opening area of ​​the oil injection port (143) of the first oil injection ring (141) is greater than the total opening area of ​​the oil injection port (143) of the second oil injection ring (142).

8. The stator assembly (1) according to claim 7, characterized in that: The first oil injection ring (141) is provided with a first circle of oil injection ports (144) and a second circle of oil injection ports (145); the first circle of oil injection ports (144) is located on a side of the second circle of oil injection ports (145) away from the stator core (11) and is arranged opposite to a welding position of the welding end; the total opening area of ​​the first circle of oil injection ports (144) is greater than the total opening area of ​​the second circle of oil injection ports (145).

9. The stator assembly (1) according to claim 8, characterized in that: The number of the first circle of oil injection ports (144) is greater than the number of the second circle of oil injection ports (145).

10. The stator assembly (1) according to any one of claims 1 to 3, characterized in that: The stator oil circuit (12) comprises a stator main oil circuit (121), the stator main oil circuit (121) extending in the axial direction of the stator core (11), the stator main oil circuit (121) being provided with the stator oil inlet (1211), the stator main oil circuit (121) being connected to the first inlet (1111), the stator main oil circuit (121) being connected to the second inlet (1112) via a first valve (13) so that the oil inlet pressure of the second inlet (1112) is lower than the oil inlet pressure of the first inlet (1111).

11. The stator assembly (1) according to claim 10, characterized in that: The stator oil circuit (12) further comprises a first cooling oil circuit (122), the first cooling oil circuit (122) being connected to the stator main oil circuit (121), the first cooling oil circuit (122) being located at an axial end of the stator core (11), and the first cooling oil circuit (122) being provided with a first outlet (1221) suitable for spraying oil toward a motor bearing.

12. The stator assembly (1) according to claim 11, characterized in that: The first cooling oil circuit (122) is correspondingly provided on both axial sides of the stator core (11).

13. A motor (100), characterized in that: include: A stator assembly (1), wherein the stator assembly (1) is a stator assembly (1) according to any one of claims 1 to 12; A rotor assembly (2), wherein the rotor assembly (2) is coupled to the stator assembly (1) so as to rotate relative to the stator assembly (1).

14. The electric machine (100) according to claim 13, characterized in that The rotor assembly (2) comprises a rotor shaft, a rotor core and a rotor oil circuit (21); the rotor core is arranged around the rotor shaft; at least a portion of the rotor oil circuit (21) is arranged on the rotor core to at least cool the rotor core.

15. The electric machine (100) according to claim 14, characterized in that The rotor oil circuit (21) comprises a second outlet (213) located at an axial end of the rotor core; in the radial direction of the rotor shaft, the second outlet (213) is arranged corresponding to the stator assembly (1) to discharge oil toward the stator assembly (1).

16. The electric machine (100) according to claim 15, characterized in that The rotor oil circuit (21) comprises a rotor main oil circuit (211) and a plurality of branch oil circuits (212); the rotor main oil circuit (211) is arranged on the rotor shaft; the plurality of branch oil circuits (212) are arranged on the rotor core and are spaced apart along the circumference of the rotor shaft; the plurality of branch oil circuits (212) are respectively connected to the rotor main oil circuit (211); and each branch oil circuit (212) is provided with the second outlet (213).

17. The electric machine (100) according to claim 16, characterized in that In the axial direction of the rotor shaft, a first connecting oil circuit (214) is provided at the first end of the rotor main oil circuit (211), and a second connecting oil circuit (215) is provided at the second end; the first connecting oil circuit (214) is used to connect a portion of the branch oil circuit (212) with the rotor main oil circuit (211), and the second connecting oil circuit (215) is used to connect another portion of the branch oil circuit (212) with the rotor main oil circuit (211).

18. The electric machine (100) according to claim 17, characterized in that The branch oil circuit (212) connected to the first connecting oil circuit (214) is a first branch oil circuit (2121), and the branch oil circuit (212) connected to the second connecting oil circuit (215) is a second branch oil circuit (2122). In the circumferential direction of the rotor shaft, the first branch oil circuit (2121) and the second branch oil circuit (2122) are arranged alternately.

19. The electric machine (100) according to any one of claims 14 to 18, characterized in that: The motor (100) comprises a main oil inlet pipe (3), the main oil inlet pipe (3) being provided with a main oil inlet port (31), and the main oil inlet pipe (3) being respectively connected to the stator oil circuit (12) and the rotor oil circuit (21).

20. The electric machine (100) according to claim 19, characterized in that The stator oil circuit (12) and / or the rotor oil circuit (21) is provided with a regulating valve (4) for adjusting flow rate.

21. An electric assembly, characterized in that: The invention comprises an electric machine (100) according to any one of claims 13 to 20.

22. A vehicle, characterized in that: Comprising an electric powertrain assembly according to claim 21.

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