Stator punching sheet, stator assembly, motor and automobile
By setting a sequence of decreasing holes on the stator laminations to form an inclined oil injection channel, the problems of complexity and high cost of traditional oil cooling systems are solved, achieving efficient motor heat dissipation and performance improvement.
Patent Information
- Application Number
- CN202520007417.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Traditional oil-cooled heat dissipation systems use oil injection rings or oil injection pipes in the motor, which increases structural complexity and manufacturing costs, and affects the motor's performance and safe operation.
Multiple sequential hole groups are set on the stator laminations, and the distance from the center of the sub-hole to the axis of the lamination body changes in a decreasing manner. When the laminations are rotated and stacked, an oil injection channel inclined towards the axis is formed, eliminating the need for an oil injection ring or oil injection pipe. Cooling oil is sprayed onto the windings using the oil injection channel.
It reduces structural complexity and manufacturing costs, and improves the heat dissipation efficiency and performance of the motor.
Smart Images
Figure CN223680830U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of stator core especially relates to a stator lamination, stator assembly, motor and car. BACKGROUND
[0002] With the rapid development of new energy vehicles, the performance requirements of vehicle driving motor are higher and higher. As the core component of new energy vehicles, the motor will generate a large amount of heat when running for a long time under high load. If the heat cannot be dissipated in time and effectively, the temperature of the motor will rise, which will affect the performance, service life and even safe operation of the motor.
[0003] In order to ensure that the motor runs efficiently in the appropriate temperature range, an effective heat dissipation system becomes an important part of the design. In the prior art, common motor cooling methods include air cooling, water cooling and oil cooling. Among them, oil cooling is widely used in high-power and high-speed motors due to its high heat dissipation performance.
[0004] The traditional oil cooling heat dissipation system usually uses oil injection ring or oil injection pipe to realize the cooling of the stator. However, the setting of the oil injection pipe or the oil injection ring increases the complexity of the overall structure and increases the design and manufacturing cost. UTILITY MODEL CONTENT
[0005] The main purpose of the utility model is to provide a stator lamination, stator assembly, motor and car, which aims to reduce the complexity of the overall structure.
[0006] To achieve the above purpose, the utility model embodiment provides a stator lamination, which comprises a lamination body and a first sequence hole group, a second sequence hole group and a third sequence hole group which are sequentially and spacedly arranged along a calibration direction, and at least one group is arranged between the first sequence hole group and the third sequence hole group.
[0007] The first sequence hole group, the second sequence hole group and the third sequence hole group all comprise a plurality of sub-holes which are adjacently arranged along the calibration direction.
[0008] In the same sequence hole group, the distance from the center of the plurality of sub-holes to the axis of the lamination body changes in a decreasing state in the calibration direction, and the central angle corresponding to the circular arc between the two adjacent sub-holes is α.
[0009] The number of sub-holes in the first sequence hole group and the second sequence hole group is equal and is N1, and the number of sub-holes in the third sequence hole group is N2, N2=N1-1.
[0010] The total number of the first sequence hole group, the second sequence hole group and the third sequence hole group is n, the central angle corresponding to the circular arc between the corresponding two sub-holes in the first sequence hole group and the adjacent second sequence hole group, the central angle corresponding to the circular arc between the corresponding two sub-holes in the third sequence hole group and the adjacent second sequence hole group, and the central angle corresponding to the circular arc between the corresponding two sub-holes in the adjacent two second sequence hole groups are all β, and β = α + 360° / n.
[0011] In an embodiment, in the same sequence hole group, the circumferential spacing between the adjacent two sub-holes along the punch body is L, the thickness of the punch body is d, and L ≥ 2d.
[0012] In an embodiment, the stator punch further comprises an ear part arranged at the outer periphery of the punch body, a plurality of ear parts are arranged at the circumferential spacing of the punch body, and n is a divisor of the number of the ear parts.
[0013] In an embodiment, the punch body is provided with a stator slot, the sequence hole group is arranged on the side of the stator slot away from the axis of the punch body, a plurality of stator slots are arranged along the circumferential direction of the punch body, and n is a divisor of the number of the stator slots.
[0014] In an embodiment, the first sequence hole group, the third sequence hole group and the second sequence hole group arranged between the first sequence hole group form an array hole group, at least two array hole groups are arranged, and any two array hole groups are deflected by a predetermined angle along the calibration direction.
[0015] In an embodiment, the sub-hole is a circular hole or a square hole.
[0016] To achieve the above-mentioned purpose, the utility model embodiment proposes a stator assembly, the stator assembly includes middle part stacking unit and the end part stacking unit of being arranged in the end part of middle part stacking unit, the end part stacking unit includes the stator punch above described, the stator punch is stacked and is arranged a plurality of along the axial direction of middle part stacking unit, the middle part stacking unit has main flow passage, the first sequence hole group, the second sequence hole group and the third sequence hole group on the stator punch close to a layer of middle part stacking unit are communicated with main flow passage respectively, after the deflection of the stator punch of adjacent two layers by the predetermined angle, the stator slot on the adjacent two stator punches is aligned with each other, and the corresponding sub-hole is sequentially conducted through in accordance with the arrangement serial number of a plurality of sequence hole groups and the arrangement serial number of the several sub-holes to form the oil injection channel that is inclined to the axis of the punch body, wherein the number of layers of the stator punch in the end part stacking unit is M, the total number of the sub-hole of all sequence hole groups is N3, and M + n = N3 + 1.
[0017] In an embodiment, the end stack unit is provided with one end stack unit at each of the opposite ends.
[0018] To achieve the above object, the utility model discloses a motor, the motor includes the stator subassembly described above.
[0019] To achieve the above object, the utility model discloses an automobile, and the automobile includes the motor described above.
[0020] The technical scheme of the present application provides a plurality of sequence hole groups on the punching body, and the distance from the center of the plurality of sub-holes in the same sequence hole group to the axis of the punching body changes in a decreasing state in the circumferential direction of the punching body. When the plurality of stator punching sheets are rotated and stacked, the corresponding sub-holes on the adjacent two layers of stator punching sheets are connected and form oil injection channels inclined towards the axis of the stator assembly. The oil injection channels can be used to inject cooling oil to the winding, thereby achieving heat dissipation of the stator assembly. Moreover, the rotation of the stator punching sheet connects the corresponding sub-holes to form the oil injection channels, eliminating the need for setting an oil injection ring or an oil injection pipe, thereby reducing structural complexity and manufacturing cost and improving motor performance. In addition, each sequence hole group corresponds to one connected oil injection channel, i.e., the number of oil injection channels is the same as the number of sequence hole groups. In this way, multiple different positions of the winding can be injected simultaneously, thereby improving the heat dissipation efficiency of the stator assembly. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without creative labor.
[0022] Figure 1 Structure diagram of the stator punching sheet of the present application;
[0023] Figure 2 End stack unit cross-sectional structure diagram in the stator assembly embodiment of the present application Figure One ;
[0024] Figure 3 End stack unit cross-sectional structure diagram in the stator assembly embodiment of the present application Figure Two ;
[0025] Figure 4 End stack unit cross-sectional structure diagram in the stator assembly embodiment of the present application Figure Three ;
[0026] Figure 5 The cross section structure schematic of the end portion stacking unit of the stator assembly embodiment of the utility model Figure Four
[0027] Figure 6 The cross section structure schematic of the stator assembly embodiment of the utility model
[0028] Figure 7 The cross section structure schematic of the stator assembly embodiment of the utility model Figure 6 The local amplification structure schematic of part A
[0029] Explanation of reference numerals:
[0030] 100, stator lamination; 110, lamination body; 120, first sequence hole group; 130, second sequence hole group; 140, third sequence hole group; 150, sub-hole; 101, first piece stator lamination; 102, second piece stator lamination; 103, third piece stator lamination; 104, fourth piece stator lamination; 105, fifth piece stator lamination; 106, sixth piece stator lamination; 107, seventh piece stator lamination; 108, eighth piece stator lamination; 200, end portion stacking unit; 210, oil injection channel; 300, middle portion stacking unit; 310, main flow channel; 400, machine shell; 410, oil inlet.
[0031] The utility model realizes the purpose, functional characteristics and advantages, which will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the embodiments of the utility model.
[0033] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.
[0034] In addition, in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0035] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0036] In addition, the technical solutions of the various embodiments of the present application can be combined with each other, but it must be based on the fact that the ordinary skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the embodiments of the present application.
[0037] The motor is a core component of new energy vehicles, and a large amount of heat will be generated during long-time high-load operation. In order to ensure that the motor operates efficiently within a suitable temperature range, an effective heat dissipation system becomes an important part of the design. In the prior art, common motor cooling methods include air cooling, water cooling and oil cooling. Among them, oil cooling is widely used in high-power and high-speed motors due to its high heat dissipation performance. The traditional oil cooling heat dissipation system usually uses an oil injection ring or an oil injection pipe to cool the stator. The oil injection ring or the oil injection pipe needs to be accurately installed around the stator, which increases the complexity of the structure.
[0038] Therefore, in the embodiments of the present application, a stator lamination, a stator assembly, a motor and a vehicle are provided. A plurality of sequence hole groups are arranged on the lamination body, and the distance from the center of the plurality of sub-holes in the same sequence hole group to the axis of the lamination body changes in a decreasing state in the circumferential direction of the lamination body. In this way, when the plurality of stator laminations are rotated and stacked, the corresponding sub-holes on the adjacent two layers of stator laminations are connected and form an oil injection channel inclined towards the axis of the stator assembly, thereby eliminating the setting of the oil injection ring or the oil injection pipe, reducing the structural complexity and manufacturing cost, and improving the performance of the motor.
[0039] In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the drawings.
[0040] As Figure 1 shown, the utility model discloses a stator lamination, and the stator lamination 100 includes the lamination body 110 and the first sequence hole group 120, the second sequence hole group 130 and the third sequence hole group 140 that are sequentially spaced apart along the calibration direction on the lamination body 110, and the second sequence hole group 130 is provided with at least one group between the first sequence hole group 120 and the third sequence hole group 140 along the calibration direction. It can be understood that the first sequence hole group 120, the second sequence hole group 130 and the third sequence hole group 140 are arranged along the clockwise direction, and can also be arranged along the counterclockwise direction, that is, along the calibration direction, the first sequence hole group 120, the second sequence hole group 130 and the third sequence hole group 140 are provided on the lamination body 110. Moreover, in the gap of the first sequence hole group 120 and the third sequence hole group 140 arranged along the calibration direction, the second sequence hole group 130 is provided with at least one group, that is, one group can be provided, or two groups or more than two groups can be provided. When two groups or more than two groups of the second sequence hole group 130 are provided, the multiple groups of the second sequence hole group 130 are sequentially spaced apart along the calibration direction, and the interval of the adjacent two groups of the second sequence hole group 130 is equal. Specifically, the calibration direction in the embodiment can be the clockwise direction, or the counterclockwise direction. It should be pointed out that the stator lamination is generally annular, and the circumferential direction of the stator lamination is the calibration direction. In the embodiment, the counterclockwise direction is the calibration direction, as shown by the arc-shaped arrow outside the lamination body in Figure 1 ;
[0041] The first sequence hole group 120, the second sequence hole group 130 and the third sequence hole group 140 all include a plurality of sub-holes 150 arranged adjacent to each other along the calibration direction on the lamination body 110. It can be understood that in the same sequence hole group, the plurality of sub-holes 150 are arranged in the same direction as the plurality of sequence hole groups, that is, all arranged in the clockwise direction, or all arranged in the counterclockwise direction, that is, the plurality of sub-holes 150 are arranged according to the calibration direction, and the arrangement numbers of the plurality of sub-holes 150 are sequentially arranged according to the calibration direction;
[0042] In the same sequence hole group, the distance from the center of the plurality of sub-holes 150 to the axis of the lamination body 110 changes in a decreasing state along the calibration direction, and the central angle corresponding to the circular arc between the adjacent two sub-holes 150 is α. That is, the plurality of sub-holes 150 gradually approach the axis, so that after the adjacent two stator laminations are stacked, an oil injection channel inclined toward the axis can be formed;
[0043] The number of the sub-holes 150 in the first sequence hole group 120 and the second sequence hole group 130 is equal and is N1, and the number of the sub-holes 150 in the third sequence hole group 140 is N2, N2=N1-1;
[0044] The total number of the first sequence hole group 120, the second sequence hole group 130 and the third sequence hole group 140 is n, the central angle of the circular arc between the corresponding two sub-holes 150 in the first sequence hole group 120 and the adjacent second sequence hole group 130, the central angle of the circular arc between the corresponding two sub-holes 150 in the third sequence hole group 140 and the adjacent second sequence hole group 130, and the central angle of the circular arc between the corresponding two sub-holes 150 in the adjacent two second sequence hole groups 130 are all β, and β = α + 360° / n. It should be noted that in the first sequence hole group 120, the first sub-hole 150, the second sub-hole 150, and the like are arranged in sequence along the arrangement direction (i.e., the calibration direction) of the plurality of sequence hole groups; in the second sequence hole group 130, the first sub-hole 150, the second sub-hole 150, and the like are also arranged in sequence along the arrangement sequence number of the plurality of sequence hole groups; and in the third sequence hole group 140, the first sub-hole 150, the second sub-hole 150, and the like are also arranged in sequence along the arrangement sequence number of the plurality of sequence hole groups. The corresponding two sub-holes 150 in the above description refer to the first sub-hole 150 in the first sequence hole group 120 corresponding to the first sub-hole 150 in the second sequence hole group 130, or the second sub-hole 150 in the first sequence hole group 120 corresponding to the second sub-hole 150 in the second sequence hole group 130, and the like; or the first sub-hole 150 in the second sequence hole group 130 corresponding to the first sub-hole 150 in the third sequence hole group 140, or the second sub-hole 150 in the second sequence hole group 130 corresponding to the second sub-hole 150 in the third sequence hole group 130, and the like. Since N2 = N1-1, the third sequence hole group 140 necessarily lacks one sub-hole 150 corresponding to one sub-hole 150 in the second sequence hole group 130. As can be seen from the above description, the correspondence in the embodiment can be understood as the correspondence of the arrangement sequence numbers of the sub-holes in each sequence hole group.
[0045] In the technical scheme adopted in this embodiment, a plurality of sequence hole groups are arranged on the punch body 110, and the distance from the center of the plurality of sub-holes 150 in the same sequence hole group to the axis of the punch body 110 changes in a decreasing manner in the circumferential direction (i.e., the calibration direction) of the punch body 110. Thus, when the plurality of stator punches 100 are rotated and stacked, the corresponding sub-holes 150 on the adjacent two layers of stator punches 100 are connected and form oil injection channels inclined towards the axis of the stator assembly. The oil injection channels can be used to inject cooling oil to the winding, thereby achieving heat dissipation of the stator assembly. Moreover, the rotation of the stator punch 100 causes the corresponding sub-holes 150 to be connected to form the oil injection channels, thereby eliminating the need to arrange an oil injection ring or an oil injection pipe, thereby reducing the structural complexity and manufacturing cost and improving the performance of the motor. In addition, each sequence hole group corresponds to a connected oil injection channel, i.e., the number of oil injection channels is the same as the number of sequence hole groups. Thus, the plurality of different positions of the winding can be simultaneously injected, thereby improving the heat dissipation efficiency of the stator assembly.
[0046] In an embodiment of the present application, in the same sequence hole group, the circumferential spacing of the two adjacent sub-holes 150 along the punch body 110 is L, the thickness of the punch body 110 is d, and L≥2d. In this way, the corresponding sub-holes 150 of the two adjacent layers of stator punching sheets 100 can be connected and form an oil injection channel inclined towards the axis of the punch body 110 after the stator punching sheets 100 are deflected by a preset angle.
[0047] In an embodiment of the present application, the stator punching sheet 100 further comprises an ear portion arranged on the outer periphery of the punch body 110. The ear portion can be used for positioning or fixing when assembled with other components, thereby ensuring correct assembly of the stator assembly. A plurality of ear portions are arranged at intervals along the circumference of the punch body 110, and n is a divisor of the number of ear portions. Specifically, n≠1 and can be an integer that divides the number of ear portions. After the plurality of stator punching sheets 100 are rotated and stacked to form an oil injection channel, the ear portions of each stator punching sheet 100 need to be aligned. Therefore, in the present embodiment, n is a divisor of the number of ear portions, which can make the ear portions of each stator punching sheet 100 aligned after the stator punching sheets 100 are rotated and stacked to form an oil injection channel, thereby improving the appearance and consistency.
[0048] In an embodiment of the present application, the punch body 110 is provided with a stator slot, which can be used to place a stator coil. The sequence hole group is arranged on the side of the stator slot away from the axis of the punch body 110, so that the oil injection channel can be inclined towards the stator coil, thereby spraying cooling oil to the stator coil to achieve heat dissipation of the stator assembly. A plurality of stator slots are arranged along the circumference of the punch body 110, and n is a divisor of the number of stator slots. In this way, the stator slots after stacking can be aligned, which is conducive to the winding of the stator coil.
[0049] In an embodiment of the present application, the first sequence hole group 120, the third sequence hole group 140, and the second sequence hole group 130 arranged between the first sequence hole group 120 form an array hole group. The array hole group is provided with at least two groups, and any two groups of array hole groups are deflected by a predetermined angle along the reference direction. In this way, more oil injection channels can be formed, and cooling oil can be sprayed to the stator coil at the same time, thereby effectively improving the heat dissipation effect.
[0050] In an embodiment of the present application, the sub-hole 150 is a circular hole or a square hole. The circular hole is relatively easy to manufacture during the processing process, thereby reducing the processing difficulty and being conducive to the flow of the cooling liquid. The square hole can provide a larger area under the same circumference, thereby increasing the cooling oil flow of the oil injection channel, and thereby being able to spray more cooling oil, and the heat dissipation effect is better. In an embodiment, the shapes of the plurality of sub-holes 150 in the same sequence hole group can be the same or different. In another embodiment, the shapes of the sub-holes 150 in different sequence hole groups can be the same or different, which is not limited herein.
[0051] To achieve the above object, the utility model discloses a stator assembly, refer to Figure 6 And Figure 7 The stator assembly includes a middle stacking unit 300 and an end stacking unit 200 arranged at the end of the middle stacking unit 300, the end stacking unit 200 includes the stator lamination 100 described above, the stator lamination 100 is stacked in multiple along the axial direction of the middle stacking unit 300, the middle stacking unit 300 has a main flow channel 310, the first sequence hole group 120, the second sequence hole group 130 and the third sequence hole group 140 on a stator lamination 100 close to the middle stacking unit 300 are communicated with the main flow channel 310 respectively, after the deflection of the stator lamination 100 of two adjacent layers by a preset angle, the stator slots on the two adjacent stator laminations 100 are aligned with each other, the corresponding sub-hole 150 is sequentially conducted according to the arrangement serial number of multiple sequence hole groups and the arrangement serial number of several sub-holes 150 in each sequence hole group to form an oil injection channel 210 inclined towards the axis of the lamination body 110, wherein the number of stacked stator laminations 100 in the end stacking unit 200 is M, the total number of sub-holes 150 of all sequence hole groups is N3, and M+n=N3+1. It can be understood that in the embodiment, the stator slots of the two adjacent stator laminations 100 are aligned one by one after the rotation and stacking of multiple stator laminations 100.
[0052] In the embodiment, eight stator laminations 100 are stacked to form the end stacking unit 200, wherein each stator lamination 100 is provided with one first sequence hole group 120, two second sequence hole groups 130 and one third sequence hole group 140, the first sequence hole group 120 and the two second sequence hole groups 130 are each provided with three sub-holes 150, the three sub-holes 150 in each sequence hole group are sequentially arranged, and the third sequence hole group 140 is provided with two sub-holes 150. After the stacking of the eight stator laminations 100, four oil injection channels 210 inclined towards the axis of the stator assembly are formed, and the specific arrangement is as follows:
[0053] (1) refer to Figure 2, the first sub-hole 150 in the first sequence hole group 120 of the first stator lamination 101, the first sub-hole 150 in the first second sequence hole group 130 of the second stator lamination 102, the first sub-hole 150 in the second second sequence hole group 130 of the third stator lamination 103, the first sub-hole 150 in the third sequence hole group 140 of the fourth stator lamination 104, the second sub-hole 150 in the first sequence hole group 120 of the fifth stator lamination 105, the second sub-hole 150 in the first second sequence hole group 130 of the sixth stator lamination 106, the second sub-hole 150 in the second sequence hole group of the seventh stator lamination 107, the second sub-hole 150 in the third sequence hole group 140 of the eighth stator lamination 108 are sequentially communicated to form a first inclined oil injection channel;
[0054] (2) Refer to Figure 3 , the first sub-hole 150 in the first second sequence hole group 130 of the first stator lamination 101, the first sub-hole 150 in the first second sequence hole group 130 of the second stator lamination 102, the first sub-hole 150 in the third sequence hole group 140 of the third stator lamination 103, the second sub-hole 150 in the first sequence hole group 120 of the fourth stator lamination 104, the second sub-hole 150 in the first second sequence hole group 130 of the fifth stator lamination 105, the second sub-hole 150 in the second sequence hole group of the sixth stator lamination 106, the second sub-hole 150 in the third sequence hole group 140 of the seventh stator lamination 107, the third sub-hole 150 in the first sequence hole group 120 of the eighth stator lamination 108 are sequentially communicated to form a second inclined oil injection channel 210;
[0055] (3) Refer to Figure 4 , the first sub-hole 150 in the second second sequence hole group 130 of the first stator lamination 101, the first sub-hole 150 in the third sequence hole group 140 of the second stator lamination 102, the second sub-hole 150 in the first sequence hole group 120 of the third stator lamination 103, the second sub-hole 150 in the first second sequence hole group 130 of the fourth stator lamination 104, the second sub-hole 150 in the second second sequence hole group 130 of the fifth stator lamination 105, the second sub-hole 150 in the third sequence hole group 140 of the sixth stator lamination 106, the third sub-hole 150 in the first sequence hole group 120 of the seventh stator lamination 107, the third sub-hole 150 in the first second sequence hole group 130 of the eighth stator lamination 108 are sequentially communicated to form a third inclined oil injection channel 210;
[0056] (4) Refer to Figure 5The first sub-hole 150 in the third sequence hole group 140 of the first stator lamination 101, the second sub-hole 150 in the first sequence hole group 120 of the second stator lamination 102, the second sub-hole 150 in the first second sequence hole group 130 of the third stator lamination 103, the second sub-hole 150 in the second second sequence hole group 130 of the fourth stator lamination 104, the second sub-hole 150 in the third sequence hole group 140 of the fifth stator lamination 105, the third sub-hole 150 in the first sequence hole group 120 of the sixth stator lamination 106, the third sub-hole 150 in the first second sequence hole group 130 of the seventh stator lamination 107, and the third sub-hole 150 in the second second sequence hole group 130 of the eighth stator lamination 108 are sequentially communicated to form a third inclined oil injection channel 210.
[0057] It should be noted that the first stator lamination 101 to the eighth stator lamination 108 are in the order from right to left in the drawings. As can be seen from the above description, if A to D represent the arrangement serial numbers of the sequence hole groups, and 1 to 3 represent the arrangement serial numbers of the sub-holes 150 in each sequence hole group, then the communication conditions of the corresponding sub-holes 150 after superposition are A1B1C1D1A2B2C2D2, B1C1D1A2B2C2D2A3, C1D1A2B2C2D2A3B3, D1A2B2C2D2A3B3C3. The communication conditions of the corresponding sub-holes 150 after superposition of other sequence hole groups or other layers of stator laminations 100 can be referred to the above description, and will not be described in detail.
[0058] In the embodiment, the rotation of the stator lamination 100 is used to make the corresponding sub-holes 150 communicated to form the oil injection channel 210, and the setting of the oil injection ring or the oil injection pipe is cancelled, so as to reduce the structural complexity and the manufacturing cost, and improve the motor performance. In addition, each sequence hole group corresponds to a communicated oil injection channel 210, that is, the number of the oil injection channels 210 is the same as the number of the sequence hole groups, so that the multiple different positions of the winding can be simultaneously injected, and the heat dissipation efficiency of the stator assembly is improved. The specific structure of the main flow channel 310 of the end stacking unit 200 can refer to the commonly used design structure, which is not limited here.
[0059] In an embodiment of the utility model, the opposite two ends of end stacking unit 200 are respectively equipped with an end stacking unit 200, so that the cooling oil of the two ends of stator assembly can be simultaneously injected, and the heat dissipation effect is further improved.
[0060] To achieve the above object, the utility model embodiment proposes a motor, the motor includes above described stator subassembly. Specific, the specific structure of stator subassembly refers to the above embodiment, because the motor has adopted all technical schemes of the above embodiment, therefore at least has all beneficial effects brought by the technical scheme of the above embodiment, here will not repeat.
[0061] With reference to Figure 6 And Figure 7 In one embodiment, the motor includes a housing 400, and the stator assembly is installed inside the housing 400. The housing 400 is provided with an oil inlet 410, and the oil inlet 410 is in communication with the main flow channel 310, so that the main flow channel 310 can be provided with cooling oil. Optionally, the oil inlet 410 is arranged at the middle part of the housing 400.
[0062] To achieve the above object, the utility model embodiment proposes a motor, the motor includes above described stator subassembly. Specific, the specific structure of stator subassembly refers to the above embodiment, because the motor has adopted all technical schemes of the above embodiment, therefore at least has all beneficial effects brought by the technical scheme of the above embodiment, here will not repeat.
[0063] The above is only the exemplary embodiment of the utility model, and does not limit the patent range of the utility model embodiment, and any equivalent structural transformation made by the utility model embodiment specification and the content of the drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model embodiment.
Claims
1. A stator lamination characterized by, The stator lamination includes a lamination body, a first sequence hole group, a second sequence hole group and a third sequence hole group which are sequentially and spacedly arranged along a direction of definition, and at least one group of the second sequence hole group is arranged between the first sequence hole group and the third sequence hole group; The first sequence hole group, the second sequence hole group and the third sequence hole group each include a plurality of sub-holes which are adjacently arranged along the direction of definition; In the same sequence hole group, the distance from the center of the plurality of sub-holes to the axis of the lamination body changes in a decreasing manner along the direction of definition, and the central angle of the circular arc between two adjacent sub-holes is α; The number of the sub-holes in the first sequence hole group and the second sequence hole group is equal and is N1, and the number of the sub-holes in the third sequence hole group is N2, N2=N1-1; The total number of the first sequence hole group, the second sequence hole group and the third sequence hole group is n, the central angle of the circular arc between the corresponding two sub-holes in the first sequence hole group and the adjacent second sequence hole group, the central angle of the circular arc between the corresponding two sub-holes in the third sequence hole group and the adjacent second sequence hole group, and the central angle of the circular arc between the corresponding two sub-holes in the adjacent two second sequence hole groups are all β, β=α+360° / n.
2. The stator lamination of claim 1 wherein, In the same sequence hole group, the circumferential spacing between two adjacent sub-holes along the lamination body is L, and the thickness of the lamination body is d, L≥2d.
3. The stator lamination of claim 1 wherein, The stator lamination further includes an ear portion arranged at the outer periphery of the lamination body, the ear portion is spacedly arranged along the circumference of the lamination body, and n is a divisor of the number of the ear portions.
4. The stator lamination of claim 1 wherein, The lamination body is provided with a stator slot, the sequence hole group is arranged on the side of the stator slot away from the axis of the lamination body, the stator slot is provided with a plurality of stator slots along the circumference of the lamination body, and n is a divisor of the number of the stator slots.
5. A stator lamination as claimed in any one of claims 1 to 4, wherein, The first sequence hole group, the third sequence hole group and the second sequence hole group arranged between the first sequence hole group form an array hole group, the array hole group is provided with at least two groups, and any two groups of the array hole group are deflected by a predetermined angle along the direction of definition.
6. The stator lamination of claim 5 wherein, The sub-hole is a circular hole or a square hole.
7. A stator assembly characterized by, The stator assembly comprises a middle stack unit and end stack units arranged at the ends of the middle stack unit, the end stack units comprise the stator lamination as claimed in any one of claims 1 to 6, a plurality of the stator laminations are arranged in layers along the axial direction of the middle stack unit, the middle stack unit has a main flow channel, the first sequence hole group, the second sequence hole group and the third sequence hole group on one layer of the stator laminations close to the middle stack unit are in communication with the main flow channel respectively, after the adjacent two layers of the stator laminations are deflected by a preset angle, the stator slots on the adjacent two stator laminations are aligned with each other, the corresponding sub-holes are sequentially conducted according to the arrangement numbers of the plurality of sequence hole groups and the arrangement numbers of the sub-holes to form an oil injection channel inclined towards the axis of the lamination body; wherein the number of the laminated stator laminations in the end stack unit is M, the total number of the sub-holes of all the sequence hole groups is N3, and M+n=N3+1.
8. The stator assembly of claim 7, wherein, The end stack unit is arranged at one end of the middle stack unit.
9. An electric machine characterized by The motor comprises the stator assembly as claimed in claim 8.
10. An automobile characterized by comprising: The automobile comprises the motor as claimed in claim 9.