Heat dissipation structure of oil-cooled motor and motor

Abstract

The utility model relates to the technical field of motors, in particular to an oil-cooled motor heat dissipation structure and a motor. Comprising a shell, a stator iron core attached to the inner circle face of the shell, a stator winding embedded in the stator iron core, a cooling liquid inlet formed in the shell, first annular shunting grooves distributed in the stator iron core and communicated with the cooling liquid inlet, and confluence plates installed on the stator winding and located on the two sides of the stator iron core. According to the utility model, the channels for cooling liquid transmission and the shunting grooves are arranged in the stator iron core, so that the effects of reducing the occupied space and increasing the utilization rate of parts are achieved, and the cooling liquid is uniformly distributed to each channel through the shunting grooves on the stator iron core and is collected by the confluence plate; and the cooling liquid is sprayed on the stator winding through the oil spraying ports in different directions and at different positions, so that effective cooling is performed, the power loss caused by temperature rise is reduced, and the use efficiency of the motor is further improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an oil-cooled motor heat dissipation structure and motor. Background Technology

[0002] Currently, new energy vehicles powered by electric motors are widely used. As the core of new energy vehicles, the operating efficiency of drive motors is receiving increasing attention, and the requirements for motor specifications are becoming more and more stringent.

[0003] As motors evolve towards lower cost, smaller size, and higher power density, heat dissipation becomes increasingly important. Motor cooling methods generally include air cooling, water cooling, and oil cooling. However, water cooling and air cooling suffer from low heat dissipation efficiency and large space requirements. Oil-cooled motors, with their superior heat dissipation performance, are gradually becoming the mainstream in the market, making oil cooling technology a hot research area for motor heat dissipation.

[0004] During the operation of an electric motor, the stator winding is one of the main heat-generating components. Currently, the commonly used oil cooling method for cooling stator windings is spray cooling. However, the coolant transmission channel is usually located outside the stator core. This not only increases the space occupied by the components inside the motor, but also results in extremely poor cooling efficiency and low utilization of the coolant, which has significant limitations.

[0005] Based on the above background, an oil-cooled motor heat dissipation structure and a motor are proposed to solve the problem. Utility Model Content

[0006] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0007] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide an oil-cooled motor heat dissipation structure and motor.

[0008] To achieve the above objectives, the technical solution of this utility model is: an oil-cooled motor heat dissipation structure, comprising: a housing, a stator core that fits against the inner circular surface of the housing, a stator winding embedded in the stator core, a coolant inlet on the housing, a first circumferential diversion groove arranged on the stator core and communicating with the coolant inlet, and a busbar plate installed on the stator winding and located on both sides of the stator core. The busbar plate fits against the inner circular surface of the housing, and a second circumferential diversion groove is provided between the busbar plate and the stator core. The first circumferential diversion groove and the second circumferential diversion groove are connected by a coolant channel, which is opened in the stator core. An oil spray nozzle is provided in the busbar plate, and the oil spray nozzle faces the stator winding. The two sides of the stator winding extend beyond the end face of the stator core.

[0009] In some embodiments, at least one coolant outlet is provided on the lower side of the housing.

[0010] In some embodiments, an oil pan is provided at the bottom outer side of the housing for collecting the coolant discharged from the coolant outlet.

[0011] In some embodiments, an external pipeline is connected to the oil pan, which includes an oil filter, an oil pump, and a heat exchanger. One side of the oil filter is connected to the oil pan, and the other side is connected to the oil pump. The oil pump pipeline is connected to the coolant inlet through the heat exchanger.

[0012] In some embodiments, an external heat exchange medium is installed on the heat exchanger.

[0013] In some embodiments, a rotor core is embedded within the stator core.

[0014] In some embodiments, the oil injection port includes a radial oil injection port and an axial oil injection port, both of which are used to spray coolant toward the stator winding, and the axial oil injection port is installed axially at an angle in the manifold.

[0015] In some embodiments, the cross-section of the axial injection port may be cylindrical, conical, or elliptical.

[0016] In some embodiments, a number of radial and axial fuel injectors are arranged in the manifold along the circumferential direction.

[0017] An electric motor, comprising the aforementioned oil-cooled motor heat dissipation structure.

[0018] By adopting the above technical solution, the beneficial effects of this utility model are as follows: The channels and distribution grooves for coolant transmission are arranged in the stator core, which reduces the space occupied and increases the utilization rate of components. The coolant is evenly distributed to each channel through the distribution grooves on the stator core. After being collected by the busbar, the coolant is sprayed onto the stator windings by oil nozzles in different directions and positions for effective cooling and temperature reduction, thereby reducing the power loss caused by temperature rise and further improving the efficiency of the motor.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0020] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0021] To make the above-mentioned beneficial effects and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0023] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0025] Explanation of key figure labels:

[0026] Figure 1 This is a schematic diagram of an oil-cooled motor heat dissipation structure and a motor structure according to the present invention;

[0027] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure of A in the diagram;

[0028] Figure 3 This is a schematic diagram of the stator core and stator winding of this utility model;

[0029] Figure 4 This utility model Figure 3 A magnified schematic diagram of the local structure of B in the diagram;

[0030] Figure 5 This is a schematic diagram of the stator core structure of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the busbar of this utility model;

[0032] Figure 7 This is a first-view structural schematic diagram of the radial and axial fuel injection ports of this utility model.

[0033] Figure 8 This is a second-view structural diagram of the radial and axial fuel injection ports of this utility model.

[0034] Figure 9 This is a schematic diagram of the axial oil injection port structure with an inclined angle according to this utility model.

[0035] Explanation of main reference numerals: Housing-1, Stator core-2, Stator winding-3, Coolant inlet-4, First circumferential flow divider-5, Commutator plate-6, Second circumferential flow divider-7, Coolant channel-8, Injector nozzle-9, Coolant outlet-10, Oil pan-11, Oil filter-12, Oil pump-13, Heat exchanger-14, External heat exchange medium-15, Rotor core-16, Radial injection nozzle-17, Axial injection nozzle-18. Detailed Implementation

[0036] The following detailed description of the embodiments of this utility model, in conjunction with the accompanying drawings, will provide a thorough understanding of how this utility model uses technical means to solve technical problems and achieve technical effects, enabling its implementation. It should be noted that, provided there is no conflict, the various embodiments and features within them can be combined with each other, and all resulting technical solutions are within the protection scope of this utility model.

[0037] Furthermore, numerous specific details are set forth in the following description for illustrative purposes to provide a thorough understanding of the embodiments of this invention. However, it will be apparent to those skilled in the art that this invention may be practiced without the specific details or particular methods described herein.

[0038] Please see Figure 1-8 This utility model provides a heat dissipation structure for an oil-cooled motor, comprising: a housing 1, a stator core 2 that is in contact with the inner circular surface of the housing 1, a stator winding 3 embedded in the stator core 2, a coolant inlet 4 opened on the housing 1, a first circumferential diversion groove 5 arranged on the stator core 2 and communicating with the coolant inlet 4, and a busbar 6 installed on the stator winding 3 and located on both sides of the stator core 2. The busbar 6 is in contact with the inner circular surface of the housing 1, and a second circumferential diversion groove 7 is provided between the busbar 6 and the stator core 2. The first circumferential diversion groove 5 and the second circumferential diversion groove 7 are connected by a coolant channel 8, which is opened in the stator core 2. An oil spray nozzle 9 is provided in the busbar 6, and the oil spray nozzle 9 faces the stator winding 3. The two sides of the stator winding 3 extend beyond the end face of the stator core 2.

[0039] When cooling the stator winding 3, the coolant enters the housing 1 through the coolant inlet 4. As the stator core 2 comes into contact with the inner circular surface of the housing 1, the coolant flows into the first circumferential diversion groove 5 on the stator core 2. The first circumferential diversion groove 5 diverts the coolant to the coolant channel 8, and then the coolant flows through the coolant channel 8 to the second circumferential diversion groove 7. The second circumferential diversion groove 7 diverts the coolant to the manifold 6, and the oil spray nozzle 9 in the manifold 6 sprays the coolant onto the stator winding 3, thereby effectively and quickly cooling it.

[0040] According to some embodiments of this application, optionally, at least one coolant outlet 10 is provided on the lower side of the housing 1. This serves to discharge the coolant sprayed onto the stator windings 3 out of the housing 1.

[0041] According to some embodiments of this application, optionally, an oil pan 11 is provided at the bottom outer side of the housing 1 for collecting the coolant discharged from the coolant outlet 10. This serves to collect the discharged coolant.

[0042] According to some embodiments of this application, optionally, the oil pan 11 is connected to an external pipeline, which includes an oil filter 12, an oil pump 13, and a heat exchanger 14. One side of the oil filter 12 is connected to the oil pan 11, and the other side is connected to the oil pump 13. The pipeline of the oil pump 13 is connected to the coolant inlet 4 through the heat exchanger 14. The oil pump 13 draws in the coolant, and during the drawing process, it passes through the oil filter 12, which filters impurities from the coolant. The drawn coolant is cooled by the heat exchanger 14, and then introduced into the housing 1 through the coolant inlet 4 to cool the stator winding 1 again. This cycle not only improves the utilization rate of the coolant but also allows for long-term cooling of the stator winding 1, enabling the stator winding 1 to maintain long-term operation and improving the working efficiency of the motor.

[0043] According to some embodiments of this application, optionally, an external heat exchange medium 15 is installed on the heat exchanger 14. This results in better heat exchange performance.

[0044] According to some embodiments of this application, optionally, a rotor core 16 is embedded within the stator core 2. This serves to enhance the magnetic field of the motor.

[0045] According to some embodiments of this application, optionally, the oil injection port 9 includes a radial oil injection port 17 and an axial oil injection port 18, both used to spray coolant onto the stator winding 3. The axial oil injection port 18 is installed axially at an angle in the manifold 6. Coolant enters the manifold 6 and is sprayed onto the stator winding 3 via the radial oil injection port 17 and the axial oil injection port 18, achieving multi-directional spraying, resulting in more comprehensive and rapid cooling of the stator winding 3, and improved cooling efficiency.

[0046] Please see Figure 9 The axial oil injection port 18 has a certain tilt angle and faces the end of the stator winding 3. It is designed for the low height of the end of the stator winding 3, which requires directional spraying of the end of the stator winding 3. By adjusting the angle (tilt angle) of the axial oil injection port 18 relative to the axial direction, the oil can be effectively sprayed onto the end of the stator winding 3, thereby further achieving good heat dissipation.

[0047] According to some embodiments of this application, optionally, the cross-section of the axial oil injection port 18 can be cylindrical, conical, or elliptical. The position of the spray point can be adjusted to optimize the uniformity of coolant sprayed from the axial oil injection port 18 onto the stator winding 3.

[0048] According to some embodiments of this application, optionally, a plurality of radial oil injection ports 17 and axial oil injection ports 18 are arranged in the manifold 6 along the circumferential direction. This allows for different spray volumes at different positions of the stator winding 3; more ports are available at higher temperatures, where cooling requirements are greater, and therefore, a larger spray volume is required.

[0049] An electric motor includes the aforementioned oil-cooled motor heat dissipation structure. This motor has a stronger heat dissipation capacity.

[0050] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0051] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0052] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. An oil-cooled motor heat dissipation structure, characterized by comprising: include: The components are: a housing (1), a stator core (2) that fits against the inner circular surface of the housing (1), a stator winding (3) embedded in the stator core (2), a coolant inlet (4) on the housing (1), a first circumferential shunt groove (5) arranged on the stator core (2) and communicating with the coolant inlet (4), and a busbar (6) installed on the stator winding (3) and located on both sides of the stator core (2). The busbar (6) is connected to the inner surface of the housing (1). The circular surfaces fit together, and a second circumferential flow divider (7) is provided between the busbar (6) and the stator core (2). The first circumferential flow divider (5) and the second circumferential flow divider (7) are connected by a coolant channel (8). The coolant channel (8) is opened in the stator core (2). An oil spray nozzle (9) is provided in the busbar (6). The oil spray nozzle (9) faces the direction of the stator winding (3). The stator winding (3) extends beyond the end face of the stator core (2) on both sides.

2. The oil-cooled motor heat dissipation structure according to claim 1, characterized in that, At least one coolant outlet (10) is provided on the lower side of the casing (1).

3. The oil-cooled motor heat dissipation structure according to claim 2, characterized in that, An oil pan (11) is provided on the outer bottom of the housing (1) and is used to collect the coolant discharged from the coolant outlet (10).

4. The oil-cooled motor heat dissipation structure according to claim 3, characterized in that, The oil pan (11) is connected to an external pipeline, which includes an oil filter (12), an oil pump (13), and a heat exchanger (14). One side of the oil filter (12) is connected to the oil pan (11), and the other side is connected to the oil pump (13). The pipeline of the oil pump (13) is connected to the coolant inlet (4) through the heat exchanger (14).

5. The oil-cooled motor heat dissipation structure according to claim 4, characterized in that, An external heat exchange medium (15) is installed on the heat exchanger (14).

6. The oil-cooled motor heat dissipation structure according to claim 1, characterized in that, The stator core (2) has a rotor core (16) embedded inside it.

7. The oil-cooled motor heat dissipation structure according to claim 1, characterized in that, The oil injector (9) includes a radial oil injector (17) and an axial oil injector (18), both of which are used to spray coolant onto the stator winding (3). The axial oil injector (18) is installed axially at an angle in the manifold (6).

8. The oil-cooled motor heat dissipation structure according to claim 7, characterized in that, The cross-section of the axial oil injection port (18) can be cylindrical, conical, or elliptical.

9. The oil-cooled motor heat dissipation structure according to claim 7, characterized in that, A number of radial oil injection ports (17) and axial oil injection ports (18) are arranged in the circumferential direction in the manifold (6).

10. An electric machine characterized by Includes the oil-cooled motor heat dissipation structure as described in any one of claims 1-9.

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