Oil-cooled motor and automobile

Abstract

The utility model provides an oil cooling motor, comprising a stator arranged in a motor housing, the stator comprises a stator iron core and a stator winding, the stator winding is arranged in the stator iron core, and at least one oil injection hole is formed on the stator iron core; the rotor is arranged in the stator; and the winding spraying structure is arranged at the end part of the stator core, the winding spraying structure comprises an oil spraying pipe, the oil spraying pipe is arranged on the oil spraying hole, and the oil spraying pipe is communicated with the oil spraying hole. According to the oil-cooled motor and the automobile disclosed by the utility model, the heat dissipation effect of the stator can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor cooling, in particular to an oil-cooled motor and a car. Background Art

[0002] With the emergence and continuous development of high-power density motors for new energy vehicles, improving and enhancing motor heat dissipation has received increasing attention. The heat load generated during motor operation will directly affect the motor's peak and continuous performance output and operational reliability. Therefore, the motor's temperature rise is an important indicator for motor design and use. On the one hand, it is related to various heat loss factors of the motor, and on the other hand, it is also inseparable from the heat dissipation of the motor.

[0003] However, the existing automobile motor heat dissipation is achieved by adding parts such as oil collecting rings to the stator core, which has a poor heat dissipation effect on the stator and has a great impact on the electromagnetic performance of the stator, resulting in low working efficiency of the motor. Therefore, there is room for improvement. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an oil-cooled motor and a vehicle, which improve the problem of poor heat dissipation effect of the stator.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model provides an oil-cooled motor, comprising:

[0007] A stator is arranged in the motor housing, the stator comprises a stator core and a stator winding, the stator winding is arranged in the stator core, and at least one oil injection hole is formed on the stator core;

[0008] a rotor disposed inside the stator; and

[0009] The winding spray structure is arranged at the end of the stator core. The winding spray structure comprises an oil spray pipe. The oil spray pipe is arranged on the oil spray hole, and the oil spray pipe is connected with the oil spray hole.

[0010] In an embodiment of the present invention, a transverse oil guide groove is formed on the surface of the stator core, and the transverse oil guide groove is communicated with the oil injection hole.

[0011] In an embodiment of the present invention, an axial oil guide groove is further formed on the surface of the stator core, and the axial oil guide groove is communicated with the transverse oil guide groove.

[0012] In an embodiment of the utility model, at least one fuel injection pipe is provided, and the fuel inlet end of the fuel injection pipe is interference fit with the fuel injection hole.

[0013] In an embodiment of the utility model, an inclined angle is formed between the straight line where the oil inlet end of the oil injection pipe is located and the straight line where the oil outlet end thereof is located.

[0014] In an embodiment of the present utility model, when a plurality of the fuel injection pipes are provided, the plurality of the fuel injection pipes are arranged circumferentially along the end of the stator core, and the plurality of the fuel injection pipes are arranged evenly or irregularly.

[0015] In one embodiment of the utility model, the winding spray structure further includes:

[0016] A positioning ring is provided at the end edge of the stator core, and the positioning ring is connected to all the fuel injection pipes in sequence; and

[0017] The sealing buckle is arranged on the positioning ring, and the sealing buckle is interference fit with the port of the axial guide oil groove.

[0018] In an embodiment of the present invention, when a plurality of positioning rings are provided, the plurality of positioning rings are respectively provided at two ends of the stator core.

[0019] In one embodiment of the utility model, the number of the sealing buckles on each of the positioning rings is less than or equal to the number of ports of the axial oil guide groove at one end of the stator core. When multiple sealing buckles are provided, the multiple sealing buckles are distributed circumferentially along the positioning ring, and the multiple sealing buckles are evenly or irregularly arranged.

[0020] The utility model also provides a car, comprising the oil-cooled motor as described in any one of the above items.

[0021] As described above, the utility model provides an oil-cooled motor and a vehicle, which can improve the heat dissipation effect of the stator, thereby improving the overall heat dissipation efficiency of the oil-cooled motor and improving the working efficiency of the oil-cooled motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Shown is a system schematic diagram of a car of the utility model;

[0024] Figure 2 Shown is a partial structural schematic diagram of an oil-cooled motor of the utility model;

[0025] Figure 3Another partial structural schematic diagram of an oil-cooled motor of the utility model is shown;

[0026] Figure 4 Display as Figure 2 Schematic diagram of the local structure;

[0027] Figure 5 Display as Figure 3 Schematic diagram of the local structure;

[0028] Figure 6 Display as Figure 2 Another partial structural schematic diagram in FIG.

[0029] Figure 7 Display as Figure 6 Schematic diagram of the local structure in;

[0030] Figure 8 Shown is a schematic diagram of a car of the present utility model.

[0031] Component number description:

[0032] 100, oil-cooled motor; 110, motor housing; 120, stator; 121, stator core; 1211, oil spray hole; 1212, transverse oil guide groove; 1213, axial oil guide groove; 122, stator winding;

[0033] 130, rotor;

[0034] 140. Winding spray structure; 141. Oil spray pipe; 142. Positioning ring; 143. Sealing buckle;

[0035] 200. Automobile. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figure 1 The utility model provides an oil-cooled motor, which can be used in automobiles to improve the heat dissipation effect of the motor, ensure the normal operation of the motor, and thus extend the service life of the motor. The oil-cooled motor 100 may include but is not limited to a motor housing 110, a stator 120, a rotor 130, and a winding spray structure 140. The motor housing 110 may be arranged on the automobile, and an oil inlet hole may be opened on the motor housing 110 so that the cooling oil can enter the motor housing 110 through the oil inlet hole.

[0038] See also Figure 1 , Figure 2 and Figure 3 , the stator 120 can be arranged in the motor housing 110, and the stator 120 can include but is not limited to a stator core 121 and a stator winding 122. Among them, the stator core 121 can be made of laminated silicon steel sheets, and its main function is to reduce eddy current loss and provide a low magnetic resistance path to guide the magnetic field through the stator 120. There are multiple grooves or notches in the stator core 121 for placing the stator winding 122. The stator winding 122 can be arranged in the stator core 121, and the stator winding 122 can be made of copper wire or other conductive materials. They form the coils required for the operation of the motor. When current passes through the stator winding 122, they will generate a rotating magnetic field around the stator core 121.

[0039] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 Further, an oil injection hole 1211 may be formed on the stator core 121, and at least one oil injection hole 1211 is provided. The oil injection hole 1211 may be a through hole that penetrates both ends of the stator core 121, or a half-through hole with the oil inlet end provided on the surface of the stator core 121 and only one end of the stator core 121 being the oil outlet end. However, the present invention is not limited thereto, and the oil injection hole 1211 may also be a through hole of other forms.

[0040] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , a transverse oil guiding groove 1212 may be formed on the surface of the stator core 121, and the transverse oil guiding groove 1212 may be connected to the oil injection hole 1211. Among them, the transverse oil guiding groove 1212 may be arranged in a closed annular shape along the surface of the stator core 121, but is not limited thereto. The transverse oil guiding groove 1212 may also be arranged intermittently, that is, a gap is left between two adjacent transverse oil guiding grooves 1212. That is, the length, depth and width of the transverse oil guiding groove 1212 may not be specifically limited, as long as the oil inlet demand can be met. There may be one or more transverse oil guiding grooves 1212, and when there are multiple transverse oil guiding grooves 1212, the multiple transverse oil guiding grooves 1212 may be arranged evenly or irregularly. For example, please refer to Figure 4 The transverse oil guiding grooves 1212 are intermittently arranged. There may be six intermittently arranged transverse oil guiding grooves 1212 . The six transverse oil guiding grooves 1212 may be located on the same horizontal plane, and the six transverse oil guiding grooves 1212 may be evenly arranged on the surface of the stator core 121 .

[0041] See also Figure 1 , Figure 2 and Figure 3 Furthermore, an axial oil guide groove 1213 is formed on the surface of the stator core 121, and the axial oil guide groove 1213 is connected to the transverse oil guide groove 1212. The axial oil guide groove 1213 intersects with the transverse oil guide groove 1212, and the intersection angle between the axial oil guide groove 1213 and the transverse oil guide groove 1212 can be greater than 0° and less than 180°. For example, the intersection angle between the axial oil guide groove 1213 and the transverse oil guide groove 1212 can be 45°, 90°, or 135°. However, it is not limited to this, and it can also be set at other angles, as long as the axial oil guide groove 1213 and the transverse oil guide groove 1212 are connected to each other. The axial oil guide groove 1213 can be provided with one, two, or four. However, it is not limited to this, and the axial oil guide groove 1213 can also be provided with other numbers, that is, the number of the axial oil guide grooves 1213 can be not specifically limited. In addition, the length, depth, and width of the axial oil guide groove 1213 may not be specifically limited, that is, the length, depth, and width of the axial oil guide groove 1213 may be specifically set according to the specific size of the stator core 121 and the demand for the oil intake. Figure 3 There can be 8 axial oil guide grooves 1213 , and the 8 axial oil guide grooves 1213 can be evenly arranged along the axial direction of the stator core 121 , and the lengths of all the axial oil guide grooves 1213 are equal to the length of the core body of the stator core 121 .

[0042] See also Figure 1 The rotor 130 can be arranged in the stator 120. The rotor 130 is a rotating part located in the center of the oil-cooled motor 100, usually mounted on the motor shaft and connected to the bearing. Inside the stator core 121 and the stator winding 122, the rotor 130 rotates in the magnetic field generated by the stator 120. The rotor 130 can be an iron core with a conductor.

[0043] See also Figure 2 and Figure 3, the winding spray structure 140 can be arranged at the end of the stator core 121, and the winding spray structure 140 can be connected to the oil spray hole 1211 to spray the cooling oil into the stator winding 122. Among them, the winding spray structure 140 can include an oil spray pipe 141, and the oil spray pipe 141 can be arranged on the oil spray hole 1211, and the oil spray pipe 141 is connected to the oil spray hole 1211. At least one oil spray pipe 141 is provided, and the oil inlet end of the oil spray pipe 141 can be interference fit with the oil spray hole 1211. For example, the oil spray pipe 141 can be provided with one, four, or eight. However, it is not limited to this, and the oil spray pipe 141 can also be provided with other numbers, as long as at least one oil spray pipe 141 is satisfied. In addition, the number of the fuel injection pipes 141 may be less than or equal to the number of the fuel injection holes 1211 , that is, the number of the fuel injection pipes 141 may be determined according to the number of the fuel injection holes 1211 to prevent the fuel injection pipes 141 from being too many and thus unable to be assembled.

[0044] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 Furthermore, when there are multiple fuel injection pipes 141, the multiple fuel injection pipes 141 can be arranged circumferentially along the end of the stator core 121, and the multiple fuel injection pipes 141 can be arranged evenly or irregularly. That is, the arrangement of the fuel injection pipes 141 can be designed according to the specific arrangement of the fuel injection holes 1211. For example, see Figure 5 and Figure 6 Eight oil injection pipes 141 may be provided at each end of the stator core 121 , and the eight oil injection pipes 141 are evenly arranged in a circumferential direction along the end of the stator core 121 .

[0045] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7It is worth further explaining that the oil inlet end of the oil injection pipe 141 and the oil injection hole 1211 can be interference fit, so that the cooling oil can flow smoothly into the oil injection pipe 141 through the oil injection hole 1211. In addition, the through hole diameter of the oil inlet end of the oil injection pipe 141 can be smaller than the through hole diameter of the oil outlet end, the through hole diameter of the oil inlet end of the oil injection pipe 141 can also be equal to the through hole diameter of the oil outlet end, and the through hole diameter of the oil inlet end of the oil injection pipe 141 can also be larger than the through hole diameter of the oil outlet end. That is, the size relationship between the through hole diameter of the oil inlet end of the oil injection pipe 141 and the through hole diameter of its oil outlet end can be determined according to the actual heat dissipation requirements of the stator winding 122. Among them, when it is necessary to achieve large-area heat dissipation of the stator winding 122, the injection flow rate of the cooling oil can be increased by setting the through hole diameter of the oil outlet end of the oil injection pipe 141 to be larger than the through hole diameter of the oil inlet end. When accurate and rapid heat dissipation of the stator winding 122 is required, the diameter of the through hole at the oil outlet end of the oil injection pipe 141 can be set smaller than the diameter of the through hole at the oil inlet end to increase the flow rate of the cooling oil, thereby increasing the spray distance of the cooling oil and improving the heat dissipation speed of the stator winding 122.

[0046] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 It is worth further explaining that an inclined angle may be formed between the straight line where the oil inlet end of the oil injection pipe 141 is located and the straight line where the oil outlet end is located, and the inclined angle may be greater than 0° and less than 180°, so that the cooling oil can be accurately sprayed into the stator winding 122 through the oil injection pipe 141, thereby improving the heat dissipation efficiency of the stator winding 122. For example, the inclined angle formed between the oil inlet end of the oil injection pipe 141 and the oil outlet end may be 45°, 90°, or 135°. However, it is not limited to this, and may also be other degrees, as long as it is greater than 0° and less than 180°. Specifically, in order to achieve a better heat dissipation effect, it is better to set the numerical range of the inclined angle between 30° and 150°.

[0047] See also Figure 2 and Figure 3 The winding spray structure 140 may further include a positioning ring 142. The positioning ring 142 may be disposed at the end edge of the stator core 121, and the positioning ring 142 may sequentially connect all the oil spray pipes 141, so as to facilitate connecting multiple oil spray pipes 141. Among them, there may be one positioning ring 142, or two positioning rings, or other numbers thereof, and when there are multiple positioning rings 142, the multiple positioning rings 142 may be respectively disposed at both ends of the stator core 121. For example, refer to Figure 1 Two positioning rings 142 may be provided, and the two positioning rings 142 may be symmetrically arranged at both ends of the stator core 121 .

[0048] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 , the winding spray structure 140 may also include but is not limited to a sealing buckle 143. The sealing buckle 143 may be arranged on the positioning ring 142, and the sealing buckle 143 may be interference fit with the port of the axial guide oil groove 1213 to achieve sealing of the port of the axial guide oil groove 1213, so that all the cooling oil can flow into the transverse guide oil groove 1212. However, it is not limited to this. The sealing buckle 143 can also further fix the positioning ring 142 and the oil spray pipe 141 by interference fit with the port of the axial guide oil groove 1213. There may be one sealing buckle 143, or two sealing buckles 143, or eight sealing buckles 143. However, it is not limited to this. The sealing buckle 143 may also be arranged in other quantities. That is, the number of sealing buckles 143 may be determined according to the number and port form of the axial guide oil grooves 1213 on the surface of the stator core 121. When the port of the axial guide oil groove 1213 is located at the end of the stator core 121, and the axial guide oil groove 1213 is set as a through hole in the axial direction of the stator core 121, a sealing buckle 143 can be provided, and a corresponding number of sealing buckles 143 are provided according to the number of the axial guide oil grooves 1213. When both ends of the axial guide oil groove 1213 are set as blind holes, the sealing buckle 143 may not be provided.

[0049] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 Further, when the locating ring 142 is provided with sealing buckles 143, the number of sealing buckles 143 on each locating ring 142 may be less than or equal to the number of ports of the axial oil guide groove 1213 at one end of the stator core 121. When there are multiple sealing buckles 143, the multiple sealing buckles 143 may be distributed along the circumference of the locating ring 142, and the multiple sealing buckles 143 may be arranged evenly or irregularly. For example, refer to Figure 3 When eight axial oil guide grooves 1213 are provided on the stator core 121 and all the axial oil guide grooves 1213 are provided as through holes, eight corresponding sealing buckles 143 can be provided on the positioning ring 142 at each end of the stator core 121, and all the sealing buckles 143 are evenly arranged in the circumferential direction.

[0050] See also Figure 1 , Figure 2 and Figure 3The utility model also provides a car, and the car 200 may include the above-mentioned oil-cooled motor 100. The oil-cooled motor 100 may be provided with at least one to improve the heat dissipation effect of the motor, ensure the normal operation of the motor, and extend the service life of the motor. Specifically, 8 through holes may be evenly arranged on the stator core 121, and the through holes may be connected from one end of the stator core 121 to the other end of the stator core 121. Among them, the through holes of the stator core 121 may be defined as oil injection holes 1211. Subsequently, 8 transverse oil guide grooves 1212 need to be evenly arranged in the middle position of the surface of the stator core 121, and the 8 transverse oil guide grooves 1212 are located on the same horizontal plane, and the 8 transverse oil guide grooves 1212 are intermittently arranged. Then, eight axial oil guide grooves 1213 are evenly opened on the surface of the stator core 121 along the axial direction thereof. The eight axial oil guide grooves 1213 are respectively arranged in the gap between two adjacent transverse oil guide grooves 1212, and each axial oil guide groove 1213 is connected to the two adjacent transverse oil guide grooves 1212 on both sides to increase the oil inlet area of ​​the cooling oil.

[0051] See also Figure 1 , Figure 2 and Figure 3 , further, two positioning rings 142 can be set, and the diameter of the positioning ring 142 is equal to the maximum outer diameter of the end of the stator core 121. Then, 8 oil spray pipes 141 are evenly arranged in an annular direction on the positioning ring 142 to realize the spraying of cooling oil. Among them, the diameter of the through hole at the oil inlet end of the oil spray pipe 141 can be set smaller than the diameter of the through hole at its oil outlet end to increase the oil output of the oil spray pipe 141. It can also be set that a 135° inclined angle is formed between the oil inlet end and the oil outlet end of the oil spray pipe 141, so that the cooling oil can be accurately sprayed into the stator winding 122 after passing through the oil spray pipe 141, thereby improving the heat dissipation efficiency of the stator winding 122. In addition, 8 sealing buckles 143 can be evenly arranged in an annular direction on the positioning ring 142, and an oil spray pipe 141 is provided between two adjacent sealing buckles 143. When the oil injection pipe 141 and the sealing buckle 143 are set, the oil injection pipe 141 can be assembled into the oil injection hole 1211 in sequence, and the sealing buckle 143 can be assembled into the port of the axial oil guide groove 1213 in sequence to complete the assembly of the winding spray structure 140, thereby improving the heat dissipation efficiency of the stator winding 122.

[0052] To sum up, the oil-cooled motor and automobile provided by the utility model can improve the heat dissipation effect inside the stator core. By setting a winding spray structure, the assembly process can be simplified, the axial space occupied by the stator core inside the oil-cooled motor can be reduced, and the impact on the electromagnetic properties of the stator can be reduced. At the same time, precise heat dissipation of the stator winding can be achieved, and the heat dissipation effect of the stator winding can be improved, thereby improving the overall heat dissipation efficiency of the oil-cooled motor and improving the working efficiency of the oil-cooled motor.

[0053] In the description of this specification, the description with reference to the terms "this embodiment", "example", "specific example", etc. 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 utility model. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The embodiments of the utility model disclosed above are only used to help illustrate the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An oil-cooled motor, characterized in that: The oil-cooled motor comprises: A stator is arranged in the motor housing, the stator comprises a stator core and a stator winding, the stator winding is arranged in the stator core, and at least one oil injection hole is formed on the stator core; a rotor disposed inside the stator; and The winding spray structure is arranged at the end of the stator core, and the winding spray structure comprises an oil spray pipe, the oil spray pipe is arranged on the oil spray hole, and the oil spray pipe is connected with the oil spray hole.

2. The oil-cooled motor according to claim 1, characterized in that: A transverse oil guide groove is formed on the surface of the stator core, and the transverse oil guide groove is communicated with the oil injection hole.

3. The oil-cooled motor according to claim 1, characterized in that: An axial oil guide groove is also formed on the surface of the stator core, and the axial oil guide groove is communicated with the transverse oil guide groove.

4. The oil-cooled motor according to claim 1, characterized in that: At least one fuel injection pipe is provided, and the fuel inlet end of the fuel injection pipe is interference fit with the fuel injection hole.

5. The oil-cooled motor according to claim 4, characterized in that: An inclined angle is formed between the straight line where the oil inlet end of the oil injection pipe is located and the straight line where the oil outlet end of the oil injection pipe is located.

6. The oil-cooled motor according to claim 3, characterized in that: When a plurality of the fuel injection pipes are provided, the plurality of fuel injection pipes are arranged circumferentially along the end of the stator core, and the plurality of fuel injection pipes are arranged evenly or irregularly.

7. The oil-cooled motor according to claim 1, characterized in that: The winding spray structure also includes: A positioning ring is provided at the end edge of the stator core, and the positioning ring is connected to all the fuel injection pipes in sequence; and The sealing buckle is arranged on the positioning ring, and the sealing buckle is interference fit with the port of the axial guide oil groove.

8. The oil-cooled motor according to claim 7, characterized in that: When a plurality of positioning rings are provided, the plurality of positioning rings are respectively provided at two ends of the stator core.

9. The oil-cooled motor according to claim 7, characterized in that: The number of the sealing buckles on each positioning ring is less than or equal to the number of ports of the axial oil guide groove at one end of the stator core. When multiple sealing buckles are provided, the multiple sealing buckles are distributed circumferentially along the positioning ring, and the multiple sealing buckles are evenly or irregularly arranged.

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

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