Motor stator and driving motor using same
By opening multiple parallel oil channels on the outer wall of the core of the motor stator and setting oil injection parts, changing the direction of oil flow for spray cooling, the problem of complex assembly and oil ring affecting the electromagnetic magnetic circuit in the prior art is solved, and the problem of the electromagnetic circuit in the existing technology is realized. Simplify assembly and efficient cooling.
Patent Information
- Application Number
- CN202420654082.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-01
AI Technical Summary
When existing motor stators cool the windings, the assembly process is complex and the oil ring structure will affect the electromagnetic circuit of the iron core.
Design a motor stator, with multiple parallel oil passages on the outer wall of its iron core, and oil injection parts are set at both ends. The inlet of the oil injection parts faces the center of the oil passage and the outlet faces the coil groove. The oil flows through the oil passage and in the oil injection parts. Change the flow direction and spray it onto the winding for cooling.
The assembly process of the motor stator is simplified, the influence of the oil ring on the electromagnetic circuit is avoided, and the efficient cooling of the winding is achieved.
Smart Images
Figure CN222441419U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor heat dissipation, in particular to a motor stator and a motor using the same. Background Art
[0002] In the field of new energy vehicles, with the emergence and continuous development of high power density motors, how to improve and enhance the heat dissipation of motors has received more and more attention. At present, motor cooling is mostly done by air cooling, water cooling and oil cooling. Compared with air cooling and water cooling, oil has strong thermal conductivity, and the contact and heat exchange of oil with the main heating area is more direct and efficient. Therefore, oil cooling has gradually become the mainstream trend of drive motor heat dissipation.
[0003] The main heat source in the motor stator is the winding. Currently, the winding is cooled by opening an oil groove in the axial direction of the iron core and arranging oil rings with holes at both ends of the iron core, but there is a problem that the oil ring affects the electromagnetic magnetic circuit of the iron core. Alternatively, an oil channel is opened in the middle of the iron core and an oil groove is opened in the axial direction of the iron core to pass through the winding to spray the winding, but there is a problem of complex assembly process. Therefore, there is room for improvement. Utility Model Content
[0004] The utility model provides a motor stator and a motor using the same, so as to solve the technical problems in the prior art of complicated assembly process or influence on the electromagnetic magnetic circuit on the iron core.
[0005] The utility model provides a motor stator, comprising:
[0006] An iron core, whose inner wall is provided with coil slots, and whose outer wall is provided with a plurality of oil passages, wherein the paths of the plurality of oil passages are parallel to the axis direction of the iron core;
[0007] Multiple injection parts with inlet and outlet;
[0008] Wherein, the oil spraying parts are arranged at both ends of the oil passage;
[0009] In the oil passage, the inlet of the oil spraying member faces the center side of the oil passage, and the outlet of the oil spraying member faces the coil slot side of the core end surface.
[0010] In one embodiment of the present invention, the oil spraying member does not protrude from the end surface of the iron core, or the top of the oil spraying member protrudes from the end surface of the iron core.
[0011] In one embodiment of the utility model, a connecting member is further included, on which a plurality of the oil spraying members are mounted, and the plurality of the oil spraying members on the connecting member are correspondingly arranged in a plurality of oil passages on the iron core.
[0012] In one embodiment of the present invention, the connecting member is in the shape of a closed ring and is arranged at the end surface of the iron core.
[0013] In one embodiment of the utility model, the inlet and outlet of the oil spraying member are connected to form an oil spraying hole.
[0014] In one embodiment of the utility model, one of the oil spraying parts is provided with one oil spraying hole, and an outlet extension line of the oil spraying hole intersects with the axis of the iron core.
[0015] In one embodiment of the utility model, at least two oil injection holes are provided on one of the oil injection parts, the outlets of at least two of the oil injection holes are symmetrical about the axis of the iron core, and the extension lines of the inlets of at least two of the oil injection holes intersect.
[0016] In one embodiment of the present invention, the shape of the oil injection hole is a straight line segment or a curved line segment.
[0017] In one embodiment of the utility model, the angle between the tangent line at the outlet of the oil spraying member and the axis of the iron core is 30° to 60°.
[0018] The utility model also provides a driving motor, comprising the motor stator as described in any one of the above items.
[0019] In one embodiment of the utility model, the output shaft of the driving motor is located in the horizontal direction, at the top of the iron core, one of the oil spray parts is provided with at least two outlets, and at the bottom of the iron core, one of the oil spray parts is provided with one outlet.
[0020] Beneficial effects of the utility model: the utility model proposes a motor stator and a driving motor using the same, the utility model has a simple assembly process and will not affect the electromagnetic magnetic circuit in the motor stator. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 It is a schematic diagram of the structure of the oil ring provided in the prior art.
[0023] Figure 2 It is a schematic diagram of the structure of the stator core provided in the prior art.
[0024] Figure 3 The figure is a schematic diagram of the structure of the stator core provided in the prior art after the oil ring is assembled.
[0025] Figure 4 The present invention is a structural schematic diagram of a stator core provided in the prior art with a central oil passage.
[0026] Figure 5 It is a structural schematic diagram of a motor stator provided in one embodiment of the utility model.
[0027] Figure 6 It is a schematic structural diagram of an iron core in a motor stator provided in one embodiment of the utility model.
[0028] Figure 7 It is a connection diagram of an oil injection component in a motor stator provided by an embodiment of the utility model.
[0029] Figure 8 The utility model provides an embodiment of Figure 5 Enlarged schematic diagram at point A in the middle.
[0030] Fig. 9 The utility model provides an embodiment of Figure 5 Enlarged schematic diagram of point B in the middle.
[0031] Fig.10 It is a structural schematic diagram of an oil injection component provided in one embodiment of the utility model.
[0032] Fig.11 This utility model Fig.10 A three-dimensional schematic diagram of the fuel injection parts provided in.
[0033] Fig.12 It is a structural schematic diagram of an oil injection component provided by another embodiment of the utility model.
[0034] Fig.13 This utility model Fig.12 A three-dimensional schematic diagram of the fuel injection parts provided in.
[0035] Fig.14 It is a structural schematic diagram of an oil injection hole in an oil injection member provided in one embodiment of the utility model.
[0036] Fig.15 It is a structural schematic diagram of an oil injection hole in an oil injection member provided by another embodiment of the utility model.
[0037] Fig.16 It is a structural schematic diagram of an oil injection hole in an oil injection member provided by another embodiment of the utility model.
[0038] Fig.17 It is a structural schematic diagram of an oil injection hole in an oil injection member provided by another embodiment of the utility model.
[0039] Fig.18 It is a structural schematic diagram of a motor stator of a driving motor provided by an embodiment of the utility model when the motor is in a lying state.
[0040] Description of Figure Numbers
[0041] 10. Iron core; 110. Oil ring; 120. Middle oil groove; 130. Coil groove; 140. Oil channel; 20. Oil injection part; 210. Oil injection hole; 220. Connector; 30. Winding. DETAILED DESCRIPTION
[0042] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0043] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.
[0044] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.
[0045] See also Figures 5 to 17 The utility model provides a motor stator and a driving motor used therein, which can be used in the manufacturing industry, new energy, transportation and home appliance industries, for example, in high-power motors used in electric vehicles, electric bicycles, electric scooters and other transportation vehicles. The utility model has a simple assembly process and will not affect the electromagnetic magnetic circuit in the motor stator. A detailed description is given below through specific embodiments.
[0046] See also Figure 5 and Figure 6In one embodiment of the utility model, the utility model provides a motor stator, which may include an iron core 10, an oil injection part 20 and a winding 30, wherein a plurality of coil slots 130 are opened on the inner wall of the iron core 10, and the arrangement direction of the plurality of coil slots 130 is parallel to the axial direction of the iron core 10, and the coil slots 130 are used to accommodate the winding 30.
[0047] Specifically, the winding 30 is a phase or the entire electromagnetic circuit composed of multiple coils or coil groups, and the coils in the winding 30 can be round enameled wires or flat wire conductors. A plurality of oil passages 140 are provided on the outer wall of the iron core 10, and the paths of the plurality of oil passages 140 are parallel to the axial direction of the iron core 10. The oil passages 140 are used to set oil, and the oil flows in the oil passages 140, and the oil is sprayed toward the winding 30 at the two ends of the oil passages 140, so as to cool the winding 30. The utility model is not limited to cooling the windings 30 at both ends of the iron core 10, but can also cool the windings 30 at one end of the iron core 10.
[0048] Specifically, there are multiple fuel injection parts 20, and an inlet and an outlet are provided on the fuel injection part 20, and the inlet and the outlet of the fuel injection part 20 are connected. The fuel injection part 20 can be arranged at both ends of the oil channel 140. For example, one fuel injection part 20 can be respectively arranged at both ends of the oil channel 140. In other embodiments, multiple fuel injection parts 20 can also be arranged at each end of the oil channel 140, and multiple fuel injection parts 20 can be arranged in parallel in the oil channel 140. The direction in which the oil flows from the oil channel 140 into the inlet of the fuel injection part 20 is recorded as the first direction, and the direction in which the oil flows out from the outlet of the fuel injection part 20 is recorded as the second direction. The first direction is different from the second direction, that is, the fuel injection part 20 plays a role in changing the flow direction of the oil in the oil channel 140. The outlet of the fuel injection part 20 can be set in the direction of the winding 30, so that the oil flowing out from the outlet of the fuel injection part 20 is sprayed onto the winding 30, thereby cooling the winding 30. As Figure 5 As shown, the black arrow indicates the flow direction of the oil.
[0049] See also Figure 5 In one embodiment of the utility model, in an oil passage 140, for the oil spraying parts 20 at both ends of the oil passage 140, the inlet of the oil spraying parts 20 faces the center side of the oil passage 140, and the outlet of the oil spraying parts 20 faces the coil slot 130 side of the end face of the iron core 10. After the winding work of the winding 30 is completed in the coil slot 130, the outlet of the oil spraying parts 20 faces the winding 30 on the end face of the iron core 10. A plurality of oil passages 140 can be numbered, and for the oil spraying parts 20 at both ends of the Nth oil passage 140, the inlet of the oil spraying parts 20 faces the center side of the Nth oil passage 140, and the outlet of the oil spraying parts 20 faces the coil slot 130 side of the end face of the iron core 10. Among them, the end face of the iron core 10 refers to the end face of the circumference of the iron core 10 at both ends of the outer wall.
[0050] Specifically, the oil spraying member 20 is located at the end face of the iron core 10. In order to improve the performance and service life of the oil spraying member 20 and reduce the wear of the oil spraying member 20, the oil spraying member 20 can be set not to protrude from the end face of the iron core 10, or the top of the oil spraying member 20 can protrude from the end face of the iron core 10. In the case where the oil spraying member 20 does not protrude from the end face of the iron core 10, it means that the oil spraying member 20 is located at the end of the oil passage 140 as a whole. In the case where the top of the oil spraying member 20 protrudes from the end face of the iron core 10, it means that the top part of the oil spraying member 20 protrudes from the end face of the iron core 10, and the other parts of the oil spraying member 20 are located in the oil passage 140. The specific structure of the iron core 10 is not limited. For example, the iron core 10 can be a welded iron core 10, and the iron core 10 can also be a core 10 with other connection methods such as covering buckle points or bonding.
[0051] See also Figure 5 In one embodiment of the present utility model, compared with the prior art, such as Figure 1 , Figure 2 and Figure 3 As shown, in the prior art, an oil groove is opened in the axial direction of the outer wall of the iron core 10, and an oil ring 110 with holes is arranged on both end surfaces of the iron core 10, and the oil inside the oil ring 110 is sprayed onto the winding 30 for cooling. In the utility model, an oil channel 140 is opened in the axial direction of the outer wall of the iron core 10, and an oil spraying member 20 is arranged at both ends of the oil channel 140, and the oil spraying member 20 is used to change the spraying direction of the oil to cool the winding 30, but the structure of the oil ring 110 will affect the electromagnetic magnetic circuit of the iron core 10.
[0052] Compared with existing technologies, such as Figure 4 As shown, by opening a middle oil groove 120 at the middle position of the iron core 10, and opening an oil groove that directly passes through the winding 30 in the axial direction of the iron core 10, the oil flows into the oil groove through the middle oil groove 120, and the winding 30 is cooled and sprayed under the action of the oil groove, but the structure of the middle oil groove 120 leads to the problem of complex assembly process. The utility model eliminates parts such as the oil ring 110 and the oil pipe, simplifies the axial oil flow characteristics of the iron core 10, simplifies the assembly process difficulty of the iron core 10 in the motor stator, saves the cost of the motor stator, and the oil spray part 20 does not occupy the end face and external space of the iron core 10, and will not affect the electromagnetic magnetic circuit of the iron core 10.
[0053] See also Figure 7In one embodiment of the utility model, the motor stator may further include a connecting member 220, on which a plurality of oil spraying members 20 may be mounted, and the plurality of oil spraying members 20 on the connecting member 220 may be correspondingly arranged in a plurality of oil passages 140 on the iron core 10. For example, N oil passages 140 are provided on the outer wall of the iron core 10, and N oil spraying members 20 may be mounted on the connecting member 220, the first oil passage 140 on the iron core 10 corresponds to the first oil spraying member 20 on the connecting member 220, the second oil passage 140 on the iron core 10 corresponds to the second oil spraying member 20 on the connecting member 220, and so on until the Nth oil passage 140 on the iron core 10 corresponds to the Nth oil spraying member 20 on the connecting member 220. The oil passages 140 on the iron core 10 correspond one-to-one to the oil spraying parts 20 on the connecting part 220 , so that each oil spraying part 20 can change the spraying direction of the oil in its corresponding oil passage 140 , thereby cooling the winding 30 .
[0054] See also Figure 7 In one embodiment of the utility model, the specific structure and shape of the connecting member 220 are not limited. For example, the connecting member 220 may be annular, specifically a closed ring or an open ring. When the connecting member 220 is in a closed ring, the connecting member 220 may be in a circular ring or a polygonal ring. In order to improve the efficiency of the motor stator during the processing, a plurality of oil spraying members 20 may be first installed on the connecting member 220, and the connecting member 220 and the plurality of oil spraying members 20 may form an oil spraying assembly, and then the oil spraying assembly may be connected to the iron core 10 for assembly. After the oil spraying assembly is assembled to the iron core 10, the winding 30 may be wound in the coil slot 130, and the assembly of the motor stator is completed.
[0055] Specifically, the specific position of the connecting member 220 is not limited, for example, the connecting member 220 can be arranged on the circumferential outer wall of the iron core 10, or the connecting member 220 can be arranged at the end surface of the iron core 10. When the oil spraying member 20 does not protrude from the end surface of the iron core 10, in order to facilitate assembly and improve installation efficiency, the connecting member 220 can be arranged at the end surface of the iron core 10, so that multiple oil spraying members 20 are located in the oil channel 140.
[0056] See also Figure 8 , Fig. 9 , Fig.10 and Fig.12In one embodiment of the utility model, the specific structure of the fuel injection member 20 is not limited. For example, between the inlet and outlet of the fuel injection member 20, there may be an oil storage chamber of the fuel injection member 20. In this embodiment, the inlet and outlet of the fuel injection member 20 are connected to form a fuel injection hole 210. At least one fuel injection hole 210 is provided on one fuel injection member 20, and the fuel injection holes 210 on multiple fuel injection members 20 are symmetrical about the axis of the iron core 10. That is, in a motor stator, the fuel injection members 20 in multiple oil passages 140 on the iron core 10 may all be one fuel injection hole 210, or the fuel injection members 20 in multiple oil passages 140 on the iron core 10 may all be at least two fuel injection holes 210, or the fuel injection members 20 in multiple oil passages 140 on the iron core 10, some of the fuel injection members 20 are one fuel injection hole 210, and the remaining fuel injection members 20 are at least two fuel injection holes 210.
[0057] See also Figure 8 , Fig.10 and Fig.11 When an oil spraying member 20 is provided with an oil spraying hole 210, the outlet extension line of the oil spraying hole 210 intersects with the axis of the iron core 10, so that the oil flowing out of the outlet of the oil spraying hole 210 can spray the winding 30 at the position closest to the oil spraying hole 210. Figure 8 As shown, the black arrow indicates the flow direction of the oil.
[0058] like Fig. 9 , Fig.12 and Fig.13 As shown, when at least two oil spray holes 210 are provided on an oil spray member 20, the outlets of the at least two oil spray holes 210 are symmetrical about the axis of the iron core 10, and the extension lines of the inlets of the at least two oil spray holes 210 intersect, so that the oil flowing out of the outlets of the at least two oil spray holes 210 can spray the winding 30 in a fan-shaped area, which can improve the cooling efficiency of the winding 30. Fig. 9 As shown, the black arrow indicates the flow direction of the oil.
[0059] See also Fig.14 , Fig.15 , Fig.16 and Fig.17 As shown, in one embodiment of the present invention, the specific shape of the oil injection hole 210 is not limited. Fig.14 As shown, the oil injection hole 210 may be a straight line segment, such as Fig.15 As shown, the oil injection hole 210 may be a broken line segment, such as Fig.16 and Fig.17 As shown, the fuel injection hole 210 may be a curved segment. The fuel injection hole 210 may also be other similar shapes, which are not listed here one by one.
[0060] See also Fig.18As shown, in one embodiment of the present invention, the angle between the tangent line at the outlet of the oil spraying member 20 and the axis of the iron core 10 can be 30° to 60°, so that the oil flowing out of the outlet of the oil spraying member 20 passes over the end surface of the iron core 10 and then sprays onto the winding 30, thereby cooling the winding 30. The specific structure and height of the winding 30 are not limited. Different numbers of oil spraying members 20 can be set based on different winding 30 structures, and the corresponding spraying angles of the oil spraying members 20 can be set. The present invention can also change the number and size of the oil spray holes 210 in the oil spraying member 20 to achieve spraying of the winding 30.
[0061] The utility model can also provide a driving motor, which includes the above-mentioned motor stator. The connection relationship, position relationship, and corresponding relationship between the iron core 10, coil slot 130, oil channel 140, oil spray member 20, oil spray hole 210, connecting member 220 and winding 30 in the driving motor are consistent with the description of the motor stator above.
[0062] See also Fig.18 As shown, in one embodiment of the present invention, the lying state of the driving motor means that the output shaft of the driving motor is located in the horizontal direction. For example, in vehicles such as electric cars, electric bicycles, and electric scooters, the driving motor is in a lying state. Fig.18 As shown, the black arrow indicates the flow direction of the oil. When the drive motor is in a flat state, at the top of the iron core 10, one oil spraying member 20 is provided with at least two outlets, that is, one oil spraying member 20 is provided with at least two oil spraying holes 210. At the bottom of the iron core 10, one oil spraying member 20 is provided with one outlet, that is, one oil spraying member 20 is provided with one oil spraying hole 210.
[0063] Specifically, at the top of the iron core 10, when at least two oil spray holes 210 are opened on an oil spray part 20, although the oil pressure in each oil spray hole 210 is reduced, which will cause the oil spraying distance to become shorter, under the action of gravity, the oil sprayed from the oil spray hole 210 on the top of the iron core 10 will fall freely after spraying, thereby flowing to other areas of the winding 30 for cooling.
[0064] Specifically, at the bottom of the iron core 10, if a plurality of oil spray holes 210 are provided on an oil spray part 20, the oil pressure of each oil spray hole 210 is reduced, which will shorten the distance of oil spraying, and under the influence of gravity, the oil in the oil spray hole 210 will fall freely after spraying, thereby failing to cool the winding 30 in a large range. Therefore, under the influence of gravity, in order to enable the oil sprayed from the oil spray hole 210 to still cool the winding 30 in a large range, it is necessary to ensure that the oil sprayed from the oil spray hole 210 has sufficient oil pressure. The number of oil spray holes 210 provided on the oil spray part 20 can be reduced, thereby increasing the oil pressure of the oil in the oil spray hole 210.
[0065] In summary, the utility model proposes a motor stator and a drive motor used therein. The motor stator in the utility model simplifies the difficulty of the assembly process, saves manufacturing costs, and the oil spraying part is arranged in the oil channel, does not occupy the space of the end face of the iron core, and does not affect the electromagnetic performance of the iron core. The oil passes through the oil channel on the iron core and sprays the winding, which can realize large-area spray cooling of the winding, and the oil can cool the iron core and the winding at the same time.
[0066] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention. As used in the description herein and in the entire claims below, unless otherwise specified, "one", and "the" include plural references. Similarly, as used in the description herein and in the entire claims below, unless otherwise specified, the meaning of "in..." includes "in..." and "on...".
Claims
1. A motor stator, characterized in that: include: An iron core, whose inner wall is provided with coil slots, and whose outer wall is provided with a plurality of oil passages, wherein the paths of the plurality of oil passages are parallel to the axis direction of the iron core; Multiple injection parts with inlet and outlet; Wherein, the oil spraying parts are arranged at both ends of the oil passage; In the oil passage, the inlet of the oil spraying member faces the center side of the oil passage, and the outlet of the oil spraying member faces the coil slot side of the core end surface.
2. The motor stator according to claim 1, characterized in that: The oil spraying member does not protrude from the end surface of the iron core, or the top of the oil spraying member protrudes from the end surface of the iron core.
3. The motor stator according to claim 1, characterized in that: It also includes a connecting member, on which a plurality of the oil spraying members are mounted, and the plurality of the oil spraying members on the connecting member are correspondingly arranged in a plurality of oil passages on the iron core.
4. The motor stator according to claim 3, characterized in that: The connecting piece is ring-shaped and is arranged at the end surface of the iron core.
5. The motor stator according to claim 1, characterized in that: The inlet and outlet of the oil spraying member are connected to form an oil spraying hole.
6. The motor stator according to claim 5, characterized in that: One of the oil spraying parts is provided with at least one of the oil spraying holes, and the oil spraying holes on the plurality of oil spraying parts are symmetrical about the axis of the iron core.
7. The motor stator according to claim 6, characterized in that: When one of the oil spraying parts is provided with one of the oil spraying holes, the outlet extension line of the oil spraying hole intersects with the axis of the iron core; When at least two of the oil injection holes are provided on one of the oil injection parts, the outlets of at least two of the oil injection holes are symmetrical about the axis of the iron core, and the extension lines of the inlets of at least two of the oil injection holes intersect.
8. The motor stator according to claim 5, characterized in that: The shape of the oil injection hole is a straight line segment, a broken line segment or a curved line segment.
9. The motor stator according to claim 2, characterized in that: The angle between the tangent line at the outlet of the oil spraying member and the axis of the iron core is 30° to 60°.
10. A driving motor, characterized in that: The invention comprises a motor stator according to any one of claims 1 to 9.
11. The driving motor according to claim 10, characterized in that: The output shaft of the driving motor is located in the horizontal direction. At the top of the iron core, one of the oil spraying parts is provided with at least two outlets, and at the bottom of the iron core, one of the oil spraying parts is provided with one outlet.