Oil injection ring for oil-cooled motor and motor

Abstract

The utility model discloses an oil injection ring for an oil cooling motor and a motor, the oil injection ring comprises a ring body, the ring body is arranged around the periphery of the winding end portion, and a matching surface matched with the stator core end portion is formed on the ring body; the extension part is arranged on the side, away from the winding, of the ring body, a protruding part protruding out of the end face of the stator iron core is formed on the extension part, and the protruding part and the end face of the stator iron core jointly define an oil collection cavity; and an oil spraying hole which is communicated with the oil collecting cavity and is opened towards the end part of the winding is formed in the lug boss. According to the oil injection ring disclosed by the utility model, the oil injection holes are formed in the convex parts, so that the oil injection angles of the oil injection holes can be changed according to the convex degrees of the convex parts, and cooling liquid can be sprayed to different areas of a winding from different angles, so that the winding is completely covered, and the cooling effect of the winding is improved.

Description

Technical Field

[0001] The utility model relates to the field of new energy electric drive systems, and particularly relates to an oil injection ring and a motor for an oil-cooled motor. Background Art

[0002] In the related art, the oil injection ring is a part on the motor for spraying and cooling the winding. The oil injection holes are arranged on the oil injection ring, and the oil injection ring sprays the coolant onto the winding through the oil injection holes to realize the cooling of the winding. However, in the prior art, the oil injection ring mostly relies on the length of the oil injection holes and the inclination angle of the oil injection holes to guide the direction of the oil liquid so as to spray to the predetermined area of the winding. This scheme requires relatively thick materials, high costs, and it is difficult to spray oil at multiple injection angles simultaneously, and specific areas of the winding cannot be covered by the coolant. In the existing scheme, an oil injection pipe is also used, and the oil injection opening is arranged thereon to cool the winding, but the coolant of this scheme cannot evenly cover the winding completely, and the cooling effect on some areas of the winding is poor. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide an oil injection ring for an oil-cooled motor. According to the oil injection ring of the utility model, by arranging the oil injection holes on the convex part, the injection angle of the oil injection holes can be changed according to the protruding degree of the convex part, and the coolant can be sprayed to different areas of the winding from different angles, so as to completely cover the winding and improve the cooling effect of the winding.

[0004] The utility model also provides a motor with the above oil injection ring.

[0005] The oil injection ring for an oil-cooled motor according to the invention, the oil-cooled motor includes: a stator core and a winding, and is characterized in that the oil injection ring includes: a ring body, the ring body is disposed around the outer periphery of the end of the winding, and a mating surface adapted to the stator core is formed on the ring body; an extension part, the extension part is disposed on a side of the ring body away from the winding, and a protruding part protruding from the end surface of the stator core is formed on the extension part, the protruding part and the end surface of the stator core jointly define an oil collecting cavity, and an oil injection hole communicating with the oil collecting cavity and opening towards the end of the winding is formed on the protruding part.

[0006] According to the present utility model, the oil injection ring can be connected to the end face of the stator core by welding or bonding the ring body, so as to achieve the sealing between the oil injection ring and the stator core. The extension part is arranged on the side of the ring body away from the winding, and a protrusion protruding from the end face of the stator core is formed on the extension part. The oil injection holes are arranged on the protrusion, so that the oil injection angle of the oil injection holes can be changed according to the protruding degree of the protrusion. When the coolant is ejected from the oil injection holes, they will cover different areas of the motor winding at different angles, thereby forming a more comprehensive cooling coverage, more effectively covering each corner of the motor winding, and improving the cooling efficiency of the motor winding.

[0007] According to some embodiments of the present utility model, the extension part includes: a first plate part, one end of the first plate part is connected to the ring body and extends obliquely in a direction radially away from the end face of the stator core; a second plate part, the second plate part is connected to the other end of the first plate part and extends in a direction radially away from the end of the winding; a third plate part, the third plate part is connected to the end of the second plate part away from the first plate and extends in a direction close to the end face of the stator core, wherein the first plate part, the second plate part and the third plate part jointly define the protrusion.

[0008] According to some embodiments of the present utility model, an oil injection hole communicating with the oil collecting cavity is formed on the first plate part.

[0009] According to some embodiments of the present utility model, the oil injection holes are configured as a plurality of circumferentially spaced ones.

[0010] According to some embodiments of the present utility model, the oil injection holes include: a first oil injection hole and a second oil injection hole, the first oil injection hole and the second oil injection hole are alternately arranged on the first plate part in the circumferential direction, wherein the first oil injection hole is axially inclined in a radially inward direction, the second oil injection hole is axially inclined in a radially inward direction, and the axial inclination angles of the first oil injection hole and the second oil injection hole are different.

[0011] According to some embodiments of the present utility model, the first plate part includes: a first section and a second section, the first section and the second section are alternately arranged, the inclination angles of the first section and the second section are different, and the second section protrudes from the first section. The first oil injection hole is formed on the first section, and the second oil injection hole is formed on the second section.

[0012] According to some embodiments of the present utility model, the oil injection ring further includes: an outer extension part, the outer extension part is connected to the end of the third plate part away from the second plate part, the outer extension part is in contact with the end face of the stator core, and the outer peripheral wall of the outer extension part abuts against the housing to limit the radial movement of the oil injection ring.

[0013] According to some embodiments of the present utility model, the fuel injection holes are configured as circular holes, long strip holes or triangular holes.

[0014] According to some embodiments of the present utility model, the fuel injection ring is configured as a metal part or a plastic part.

[0015] The motor according to the present utility model will be briefly described below.

[0016] The motor according to the present utility model is provided with the fuel injection ring described in any one of the above embodiments. Since the motor according to the present utility model is provided with the fuel injection ring described in any one of the above embodiments, the heat dissipation performance during the operation of the motor according to the present application is better, and the stability and reliability of the motor during operation are improved.

[0017] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is the front view of the fuel injection ring according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 the cross-sectional view taken along A-A in

[0021] Figure 3 is the schematic diagram of the cooperation between the fuel injection ring and the stator core according to an embodiment of the present utility model;

[0022] Figure 4 is Figure 2 the enlarged view at A in

[0023] Figure 5 is Figure 3 the enlarged view at B in

[0024] Figure 6 is Figure 3 the enlarged view at C in

[0025] Figure 7 is the top view of the fuel injection ring according to an embodiment of the present utility model;

[0026] Figure 8 is the structural schematic diagram of the fuel injection ring according to an embodiment of the present utility model.

[0027] Reference Signs:

[0028] 100, motor;

[0029] 11. Stator core; 12. Winding; 13. Oil injection ring;

[0030] 21. Ring body; 22. Extension part;

[0031] 31. First plate part; 32. Second plate part; 33. Third plate part; 101. Oil collecting cavity; 102. Oil injection hole;

[0032] 41. First section; 42. Second section. Detailed implementation manners

[0033] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0034] In the related art, the oil injection ring is a part used for spraying and cooling the winding on the motor. The oil injection holes are provided on the oil injection ring, and the oil injection ring sprays the coolant onto the winding through the oil injection holes to realize the cooling of the winding. However, in the prior art, the oil injection ring mostly relies on the length of the oil injection holes and the inclination angle of the oil injection holes to realize the guidance of the oil flow direction so as to spray to the predetermined area of the winding. This solution requires a relatively thick material, high cost, and it is difficult to spray oil at multiple injection angles simultaneously, and specific areas of the winding cannot be covered by the coolant. In the existing solutions, there are also those that use oil injection pipes with oil injection openings on them to cool the winding, but the coolant of this solution cannot evenly and completely cover the winding, and the cooling effect on some areas of the winding is poor. The following refers to Figures 1-5 Describe an oil injection ring for a motor according to an embodiment of the present utility model.

[0035] According to the oil injection ring 13 for an oil-cooled motor, a stator core 11 and a winding 12 are arranged in the oil-cooled motor. The oil injection ring is arranged on the outer periphery of the winding 12 and is in contact with the stator core 11. The oil injection ring can spray the coolant towards the end of the winding 12 to realize the cooling of the winding 12.

[0036] The oil injection ring includes: a ring body 21 and an extension part. The ring body 21 is disposed around the outer periphery of the end of the winding 12. A mating surface that mates with the stator core 11 is formed on the ring body 21. The mating surface is welded to the end face of the stator core 11. The mating surface and the end face of the stator core 11 can form a completely sealed interface, effectively preventing coolant leakage. The extension part is disposed on the side of the ring body 21 away from the winding 12. A protruding part that protrudes from the end face of the stator core 11 is formed on the extension part. The protruding part and the end face of the stator core 11 jointly define an oil collecting cavity 101. An oil injection hole 102 that communicates with the oil collecting cavity 101 and opens toward the end of the winding 12 is formed on the protruding part. The oil injection hole 102 is disposed on the protruding part, such that the injection angle of the oil injection hole 102 can be changed according to the protruding degree of the protruding part. When the coolant sprays out from the oil injection hole 102, they will cover different areas of the motor winding 12 at different angles, thereby forming a more comprehensive cooling coverage, more effectively covering each corner of the motor winding 12, and improving the cooling efficiency of the motor winding 12.

[0037] According to some embodiments of the present invention, the oil injection ring 13 can be connected to the end face of the stator core 11 by welding or bonding the ring body 21, realizing the seal between the oil injection ring 13 and the stator core 11. The extension part is disposed on the side of the ring body 21 away from the winding 12. A protruding part that protrudes from the end face of the stator core 11 is formed on the extension part. The oil injection hole 102 is disposed on the protruding part, such that the injection angle of the oil injection hole 102 can be changed according to the protruding degree of the protruding part. When the coolant sprays out from the oil injection hole 102, they will cover different areas of the motor winding 12 at different angles, thereby forming a more comprehensive cooling coverage, more effectively covering each corner of the motor winding 12, and improving the cooling efficiency of the motor winding 12.

[0038] According to some embodiments of the present invention, the extension part includes: a first plate part 31, a second plate part 32, and a third plate part 33. One end of the first plate part 31 is connected to the ring body 21 and extends obliquely in a direction radially away from the end face of the stator core 11. The first plate part 31 is obliquely disposed to form an inclined oil injection path, ensuring that the coolant can be sprayed onto the end of the winding 12 at a more optimized angle, improving the coverage range and efficiency of the coolant.

[0039] The second plate portion 32 is connected to the other end of the first plate portion 31 and extends radially away from the end of the winding 12. The design of the second plate portion 32 helps to expand the structure of the extension portion, providing space for the subsequent formation of the third plate portion 33 and the convex portion. The third plate portion 33 is connected to the end of the second plate portion 32 away from the first plate and extends towards the end face of the stator core 11. The first plate portion 31, the second plate portion 32, and the third plate portion 33 together define a convex portion, and an oil collecting cavity 101 is formed inside the convex portion. The oil injection holes 102 are provided on the convex portion to ensure that the coolant can be sprayed onto the end of the winding 12 at a preset angle and direction, achieving precise cooling of some special positions on the winding 12.

[0040] According to some embodiments of the present invention, oil injection holes 102 communicating with the oil collecting cavity 101 are formed on the first plate portion 31.

[0041] In some specific embodiments, the first plate portion 31 extends obliquely radially away from the end face of the stator core 11. The oil injection holes 102 are provided on the first plate portion 31 and communicate with the oil collecting cavity 101, such that the oil injection holes 102 are obliquely arranged axially. The coolant is ejected along the normal direction of the first plate portion 31 to form a set of liquid spraying paths obliquely towards the axis of the winding 12, so as to be able to guide the coolant to be sprayed onto the motor winding 12 at a better angle, ensuring that the coolant can more directly and uniformly cover the target area and improving the cooling efficiency of the winding 12.

[0042] According to some embodiments of the present invention, the oil injection holes 102 are configured as a plurality of spaced circumferentially to ensure that the coolant is uniformly distributed over the entire circumferential range of the motor winding 12, such that the winding 12 can be uniformly covered by the coolant in the circumferential direction, preventing local overheating of the winding 12 and improving the cooling effect on the winding 12. In addition, the design of spraying liquid through a plurality of oil injection holes 102 can increase the contact area between the coolant and the motor winding 12, improving the heat exchange efficiency between the coolant and the winding 12 and enhancing the cooling efficiency of the motor winding 12.

[0043] According to some embodiments of the present utility model, the oil injection holes 102 include: a first oil injection hole and a second oil injection hole. The first oil injection hole and the second oil injection hole are alternately arranged circumferentially on the first plate portion 31, ensuring uniform distribution of the coolant at the end of the motor winding 12 and avoiding the problem of insufficient local cooling caused by overly concentrated distribution of the first oil injection hole and the second oil injection hole. The first oil injection hole is axially inclined in the radially inward direction, and the second oil injection hole is axially inclined in the radially inward direction. The axial inclination angles of the first oil injection hole and the second oil injection hole are different. When the coolant is ejected from the first oil injection hole and the second oil injection hole, they will cover different regions of the motor winding 12 at different angles, thereby forming a more comprehensive cooling coverage to more effectively cover all corners of the motor winding 12 and improving the cooling efficiency of the motor winding 12.

[0044] According to some embodiments of the present utility model, the first plate portion 31 includes: a first section 41 and a second section 42. The first section 41 and the second section 42 are alternately arranged with each other. The inclination angles of the first section 41 and the second section 42 are different, and the second section 42 protrudes from the first section 41. The first oil injection hole is formed on the first section 41, and the second oil injection hole is formed on the second section 42.

[0045] In some specific embodiments, during the manufacturing process of the oil injection ring 13, by using different stamping dies to change the inclination angle of at least part of the first plate portion 31, the first plate portion 31 can be composed of the first section 41 and the second section 42. Both the first section 41 and the second section 42 are configured in multiple segments. The first section 41 and the second section 42 are alternately and circumferentially arranged. The second section 42 protrudes from the first section 41. The inclination angles of the second section 42 and the first section 41 relative to the axis of the winding 12 are different. The first oil injection hole is provided on the first section 41, and the second oil injection hole is provided on the second section 42, such that the axial inclination angles of the first oil injection hole and the second oil injection hole are different. When the coolant is ejected from the first oil injection hole and the second oil injection hole, they will cover different regions of the motor winding 12 at different angles, thereby forming a more comprehensive cooling coverage to more effectively cover all corners of the motor winding 12 and improving the cooling efficiency of the motor winding 12.

[0046] In addition, the present application can also design multiple first sections 41 with different inclination angles and multiple second sections 42 with different inclination angles according to the design requirements of the oil-cooled motor to achieve oil injection at more angles of the oil injection ring 13, to more effectively cover all corners of the motor winding 12 and improve the cooling efficiency of the motor winding 12.

[0047] According to some embodiments of the present utility model, the oil injection ring 13 further includes: an extension portion 22, the extension portion 22 is connected to one end of the third plate portion 33 away from the second plate portion 32, the extension portion 22 is in contact with the end face of the stator core 11, and the outer peripheral wall of the extension portion 22 abuts against the housing to limit the radial movement of the oil injection ring 13.

[0048] In some specific embodiments, an extension portion 22 is further provided inside the oil injection ring 13. The extension portion 22 is disposed on the side of the third plate away from the second plate. During the assembly of the motor, the outer peripheral wall of the extension portion 22 can abut against the inner wall of the housing, thereby restricting the radial movement of the oil injection ring 13 within the housing. Even when the motor is running at high speed or encountering vibrations, the position of the oil injection ring 13 can be kept stable, ensuring the accuracy of the oil injection path and the oil injection efficiency. In addition, the extension portion 22 is in contact with the end face of the stator core 11, and a fitting for welding or bonding to the end face of the stator core 11 is formed on the extension portion 22. Through the welding connection or bonding connection between the extension portion 22 and the stator core 11, the oil injection ring 13 can be firmly connected to the stator core 11, not only enhancing the integrity of the structure, but also improving the sealing performance between the oil injection ring 13 and the stator core 11.

[0049] According to some embodiments of the present utility model, the oil injection hole 102 is configured as a circular hole, a long strip hole or a triangular hole.

[0050] In some specific embodiments, the oil injection hole can be configured as a circular hole, a long strip hole or a triangular hole or other shaped holes. The shape of the oil injection hole can be changed according to the design requirements of the motor. The oil injection hole 102 can be configured as a circular hole. The coolant ejected from the circular hole is usually in a conical shape, and the coolant is distributed relatively evenly, which can effectively cover all parts of the motor winding 12 and improve the cooling effect of the winding 12. The coolant ejected from the circular hole has a better atomization effect, and the fine coolant droplets are more likely to penetrate into the tiny gaps between the windings of the winding 12, further enhancing the cooling effect of the winding 12.

[0051] In addition, the oil injection hole 102 can also be configured as a long strip hole. The oil flow ejected from the long strip hole has strong directivity, and the direction and coverage range of the oil flow can be precisely controlled, which is particularly suitable for the concentrated cooling of specific areas on the winding 12. The shape of the coolant ejected from the long strip hole helps to reduce the collision and condensation of the coolant in the air and keep the coolant in a dispersed state, which is beneficial to improving the heat dissipation efficiency of the winding 12.

[0052] The oil injection hole 102 can also be configured as a triangular hole. The shape of the triangular oil injection hole can affect the ejection direction and diffusion angle of the coolant, which helps to more accurately direct the coolant to specific areas on the winding 12 to improve the heat dissipation efficiency of the winding 12.

[0053] According to some embodiments of the present utility model, the fuel injection ring 13 is configured as a metal part or a plastic part.

[0054] In some specific embodiments, the fuel injection ring 13 can be made of metal materials (such as steel, aluminum alloy, etc.). The metal materials have high strength and hardness, can withstand large mechanical stresses, and are suitable for high-load or high-temperature environments. The metal materials have good thermal conductivity and thermal stability, which helps to improve the heat dissipation effect of the motor.

[0055] In addition, the fuel injection ring can be made by stamping process. The fuel injection ring made by stamping process can achieve high-precision dimensional control, ensuring the precise fit of the fuel injection ring with other components of the motor.

[0056] In some other specific embodiments, the fuel injection ring can be made of plastic materials (such as plastic materials like polyamide, polyoxymethylene, etc.). The plastic materials have low density, can significantly reduce the weight of the fuel injection ring, reduce the energy consumption of the equipment. At the same time, plastic parts are easy to achieve complex shapes and thin-wall structures, which helps to optimize the design of the fuel injection ring. Also, the fuel injection ring made of plastic has good electrical insulation performance, which can reduce electrical interference when used in the motor.

[0057] In addition, the fuel injection ring can be mass-produced by injection molding process. The injection molding process is highly automated, reducing manual operation, lowering the production error rate, improving production efficiency and consistency, and also reducing production costs.

[0058] The motor according to the present utility model will be briefly described below.

[0059] The motor according to the present utility model is provided with the fuel injection ring described in any one of the above embodiments. Since the motor according to the present utility model is provided with the fuel injection ring described in any one of the above embodiments, the heat dissipation performance during the operation of the motor according to the present application is better, improving the stability and reliability of the motor during operation.

[0060] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0061] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.

[0062] In the description of the present utility model, "a plurality of" means two or more than two.

[0063] In the description of the present utility model, that the first feature is "above" or "below" the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but in contact through additional features therebetween.

[0064] In the description of the present utility model, that the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do 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.

[0065] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An oil injection ring for an oil-cooled motor, the oil-cooled motor comprising: A stator core (11) and a winding (12), characterized in that an oil injection ring (13) comprises: A ring body (21) which is disposed around the outer periphery of the end of the winding (12), and a mating surface which mates with the end of the stator core (11) is formed on the ring body (21); An extension part which is disposed on a side of the ring body (21) away from the winding (12), a protrusion part protruding from the end surface of the stator core (11) is formed on the extension part, an oil collecting cavity (101) is defined jointly by the protrusion part and the end surface of the stator core (11), and an oil injection hole (102) which communicates with the oil collecting cavity (101) and opens towards the end of the winding (12) is formed on the protrusion part.

2. The oil injection ring for an oil-cooled motor according to claim 1, characterized in that, The extension part comprises: A first plate part (31) one end of which is connected to the ring body (21) and extends obliquely in a direction away from the end surface of the stator core (11) along the radial direction; A second plate part (32) which is connected to the other end of the first plate part (31) and extends in a direction away from the end of the winding (12) along the radial direction; A third plate part (33) which is connected to an end of the second plate part (32) away from the first plate and extends in a direction close to the end surface of the stator core (11), wherein the first plate part (31), the second plate part (32) and the third plate part (33) jointly define the protrusion part.

3. The oil injection ring for an oil-cooled motor according to claim 2, wherein, An oil injection hole (102) which communicates with the oil collecting cavity (101) is formed on the first plate part (31).

4. The oil injection ring for an oil-cooled motor according to claim 3, characterized in that The oil injection holes (102) are configured to be multiple and spaced apart in the circumferential direction.

5. The oil injection ring for an oil-cooled motor according to claim 4, characterized in that, The oil injection holes (102) comprise: A first oil injection hole (102) and a second oil injection hole (102), the first oil injection hole (102) and the second oil injection hole (102) are alternately arranged on the first plate part (31) in the circumferential direction, wherein the first oil injection hole (102) is obliquely arranged along the axial direction in the radially inward direction, the second oil injection hole (102) is obliquely arranged along the axial direction in the radially inward direction, and the inclination angles of the first oil injection hole (102) and the second oil injection hole (102) in the axial direction are different.

6. The oil injection ring for an oil-cooled motor according to claim 5, characterized in that, The first plate part (31) comprises: A first section (41) and a second section (42), the first section (41) and the second section (42) are alternately arranged with each other, and the second section (42) protrudes from the first section (41), the inclination angles of the first section (41) and the second section (42) are different, the first oil injection hole (102) is formed on the first section (41), and the second oil injection hole (102) is formed on the second section (42).

7. The oil injection ring for an oil-cooled motor according to claim 2, wherein, Further comprising: An outer extension part (22) which is connected to an end of the third plate part (33) away from the second plate part (32), the outer extension part (22) is attached to the end surface of the stator core (11), and the outer peripheral wall of the outer extension part (22) abuts against the housing to limit the radial movement of the oil injection ring.

8. The oil injection ring for an oil-cooled motor according to claim 4, characterized in that, The fuel injection hole (102) is configured as a circular hole, a long strip hole or a triangular hole.

9. The oil injection ring for an oil-cooled motor according to claim 1, characterized in that, The fuel injection ring is configured as a metal part or a plastic part.

10. A motor, characterized in that, It includes the fuel injection ring according to any one of claims 1-9.

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