Stator core, motor and vehicle

Abstract

The utility model discloses a stator core, a motor and a vehicle. The stator core comprises an oil inlet sheet, an oil duct sheet and a flow deflector. The oil inlet sheet, the oil duct sheet and the flow deflector are all provided with stator grooves at intervals along the inner circumference, the plurality of correspondingly matched stator grooves extend along the axial direction of the stator core, the oil inlet sheet is provided with a first inner ring oil hole between the adjacent stator grooves, the oil inlet sheet is provided with an oil inlet groove, and the oil inlet groove is provided with a second inner ring oil hole between the adjacent stator grooves. An outer ring oil hole is formed in the circumferential direction of the oil duct piece, the oil inlet groove is communicated with the outer ring oil hole to form a first cooling oil duct, a second inner ring oil hole is formed in the position, located between the adjacent stator grooves, of the oil duct piece, and the first inner ring oil hole is communicated with the second inner ring oil hole to form a second cooling oil duct. A flow guide groove is formed in the circumferential direction of the flow guide piece, and the first cooling oil channel and the second cooling oil channel are communicated through the flow guide groove. According to the utility model, deep cooling of the stator core is realized, and the cooling effect of the stator core is improved.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a stator core, a motor, and a vehicle. Background Technology

[0002] Motors generate a lot of heat when they are running. If the heat cannot be dissipated in time, it may cause the equipment to overheat, which will affect its efficiency, lifespan and even cause damage.

[0003] Oil circuits are typically installed inside the stator core to achieve cooling, lubrication, and insulation protection. Existing stator structures mostly have oil circuits on the outer ring of the stator core, which has limited cooling effect. Utility Model Content

[0004] The purpose of this utility model is to solve the aforementioned technical problems by providing a stator core, a motor, and a vehicle, thereby achieving deep cooling of the stator core and improving its cooling effect. To achieve the above objective, the technical solution of this utility model is as follows:

[0005] A stator core includes an oil inlet plate, an oil channel plate, and a guide plate. Each of the oil inlet plate, oil channel plate, and guide plate has stator slots spaced along its inner circumference. Multiple corresponding stator slots extend axially along the stator core. The oil inlet plate has a first inner ring oil hole between adjacent stator slots and an oil inlet groove. The oil channel plate has an outer ring oil hole circumferentially connected to the oil inlet groove and the outer ring oil hole to form a first cooling oil channel. The oil channel plate has a second inner ring oil hole between adjacent stator slots, and the first inner ring oil hole and the second inner ring oil hole are connected to form a second cooling oil channel. The guide plate has a guide groove circumferentially connected to the first cooling oil channel and the second cooling oil channel.

[0006] Specifically, oil passage plates are provided on both sides of the oil inlet plate, and the outer periphery of the oil inlet plate and the two oil passage plates facing the oil inlet plate together form the oil inlet groove.

[0007] Specifically, the oil inlet plate is disposed on both sides of the stator core along the axial direction, the guide plate is disposed in the middle and / or both sides of the stator core along the axial direction, and the oil passage plate is disposed between the oil inlet plate and the guide plate.

[0008] Specifically, oil passage plates are provided on both sides of the guide plate, and the outer periphery of the guide plate and the two oil passage plates facing the guide plate together form an oil passage groove, which is connected to the outer ring oil hole and the guide groove respectively.

[0009] Specifically, one end of the guide groove extends radially between adjacent stator slots, and the other end of the guide groove is connected to the outer periphery of the guide plate.

[0010] Specifically, the first inner ring oil hole, the second inner ring oil hole, and one end of the guide groove are all located between the bottoms of the adjacent stator slots.

[0011] Specifically, it also includes oil spray plates, which are disposed on both sides of the stator core along the axial direction, and oil channels are disposed between the oil spray plates and the guide plates.

[0012] Specifically, the fuel injector is provided with fuel injector holes in the circumferential direction, and the fuel injector holes are in communication with at least a portion of the second inner ring fuel holes.

[0013] An electric motor, comprising the aforementioned stator core.

[0014] A vehicle including the aforementioned motor.

[0015] Compared with the prior art, the beneficial effects of this utility model on the stator core, motor, and vehicle are mainly reflected in:

[0016] The oil inlet groove is the oil inlet position of the stator core. The cooling oil entering from the oil inlet groove can flow through the outer ring oil hole in the first cooling oil channel. The cooling oil can also enter the second inner ring oil hole through the outer ring oil hole and the guide groove, and then flow in the second cooling oil channel. The cooling oil can be transported in the first and second cooling oil channels to achieve large-area cooling of the stator core. At the same time, the second cooling oil channel is closer to the stator slot, which can fully cool the part of the stator core near the stator winding and improve the cooling effect of the stator core. Attached Figure Description

[0017] Figure 1 A disassembly diagram of the stator core is provided for the embodiments of this application;

[0018] Figure 2 A schematic diagram of the oil inlet plate is provided for an embodiment of this application;

[0019] Figure 3 A schematic diagram of the structure of the oil passage segment is provided for the embodiments of this application;

[0020] Figure 4 A schematic diagram of the flow guide plate is provided for the embodiments of this application;

[0021] Figure 5 A schematic diagram of the structure of the fuel injection plate is provided for an embodiment of this application;

[0022] Figure 6 A schematic diagram of the motor structure is provided for an embodiment of this application.

[0023] Figure label:

[0024] Oil inlet plate 1, first inner ring oil hole 11, oil inlet groove 12;

[0025] Oil passage 2, outer ring oil hole 21, second inner ring oil hole 22;

[0026] 3. Flow guide plate; 31. Flow guide groove; 32. Oil passage groove;

[0027] 4. Injection plate; 41.

[0028] Motor housing 5, oil inlet 51, stator winding 52;

[0029] Stator slot 6. Detailed Implementation

[0030] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0031] Example 1

[0032] This embodiment provides a stator core, including stacked oil inlet plates 1, oil passage plates 2, and guide plates 3; as shown Figures 1-5 As shown, the oil inlet plate 1, the oil passage plate 2, and the guide plate 3 are all provided with stator slots 6 spaced apart along the inner circumference. The stator core is part of the stator structure and is a hollow structure. The stator also includes a stator winding 52. The stator slots 6 are used to install the stator winding 52. Multiple corresponding stator slots 6 are arranged to extend along the axial direction of the stator core.

[0033] It should be noted that the stator core and stator winding 52 are coaxially arranged, and the central axis of the stator, the central axis of the stator core, and the central axis of the stator winding 52 are collinear. Furthermore, the radial directions of the stator core, stator winding 52, and stator are consistent, as are the axial directions of the stator core, stator winding 52, and stator.

[0034] The number of oil inlet plate 1, oil passage plate 2, and guide plate 3 can be multiple, while the number of oil inlet plate 1 and guide plate 3 can be single. The oil inlet plate 1, oil passage plate 2, and guide plate 3 can be fixed by welding.

[0035] The oil inlet plate 1 has a first inner ring oil hole 11 located between adjacent stator slots 6, and an oil inlet groove 12 is provided on the oil inlet plate 1. The oil passage plate 2 has an outer ring oil hole 21 circumferentially arranged, specifically, the outer ring oil hole 21 is provided on the outer periphery of the oil passage plate 2. The oil inlet groove 12 and the outer ring oil hole 21 are connected to form a first cooling oil passage. The oil passage plate 2 has a second inner ring oil hole 22 located between adjacent stator slots 6, and the first inner ring oil hole 11 and the second inner ring oil hole 22 are connected to form a second cooling oil passage. The guide plate 3 has a guide groove 31 circumferentially arranged, and the first cooling oil passage and the second cooling oil passage are connected through the guide groove 31.

[0036] The oil inlet groove 12 is the oil inlet position of the stator core. The cooling oil entering from the oil inlet groove 12 can flow in the first cooling oil channel through the outer ring oil hole 21. The cooling oil can enter the second inner ring oil hole 22 through the outer ring oil hole 21 and the guide groove 31, and then flow in the second cooling oil channel. The cooling oil can be transported in the first cooling oil channel and the second cooling oil channel to achieve large-area cooling of the stator core. At the same time, the second cooling oil channel is closer to the stator slot 6, which can fully cool the part of the stator core near the stator winding 52 and improve the cooling effect of the stator core.

[0037] In one embodiment, oil passage plates 2 are provided on both sides of the oil inlet plate 1, and the outer periphery of the oil inlet plate 1 and the side of the two oil passage plates 2 opposite to the oil inlet plate 1 together form an oil inlet groove 12.

[0038] Among them, the diameter of the oil inlet plate 1 is smaller than the diameter of the oil channel plate 2. When the oil inlet plate 1 is in contact with the two oil channel plates 2, the outer periphery of the oil inlet plate 1 is located between the two oil channel plates 2. The outer periphery of the oil inlet plate 1 forms the bottom of the oil inlet groove 12. The oil inlet groove 12 is an annular groove structure, which enables the cooling oil to flow fully in the oil inlet groove 12 and uniformly cool the outer periphery of the stator core.

[0039] In one embodiment, the oil inlet plate 1 is disposed on both sides of the stator core along the axial direction, the guide plate 3 is disposed in the middle and / or both sides of the stator core along the axial direction, and an oil passage plate 2 is disposed between the oil inlet plate 1 and the guide plate 3.

[0040] Specifically, the guide vanes 3 are disposed in the middle and on both sides of the stator core. There are three guide vanes 3. The guide vanes 3 on both sides of the axial direction of the stator core are symmetrically arranged relative to the guide vane 3 in the middle of the stator core. The cooling oil entering from the oil inlet 1 is transported from both sides of the stator core to the middle of the stator core. The guide vanes 3 are symmetrically arranged on the stator core. By adopting the method of oil inlet on both sides and drainage in the middle, the cooling oil can be effectively diverted, so that the cooling oil is transported quickly and evenly in the first cooling oil channel and the second cooling oil channel.

[0041] In one embodiment, oil passage plates 2 are provided on both sides of the guide plate 3. The outer periphery of the guide plate 3 and the side of the two oil passage plates 2 opposite to the guide plate 3 together form an oil passage groove 32. The guide plate 3 is provided to avoid the outer ring oil hole 21. The oil passage groove 32 is connected to the outer ring oil hole 21 and the guide groove 31 respectively.

[0042] In this design, the diameter of the guide vane 3 is smaller than that of the oil channel plate 2. When the guide vane 3 is in contact with the two oil channel plates 2, the outer periphery of the guide vane 3 is located between the two oil channel plates 2, forming the bottom of the oil passage groove 32, which is an annular groove structure. Simultaneously, the outer periphery of the guide vane 3 avoids the outer ring oil holes 21 of the oil channel plates 2, ensuring that the guide vane 3 does not obstruct the outer ring oil holes 21. This allows the cooling oil in the outer ring oil holes 21 to enter the oil passage groove 32, and then the cooling oil in the oil passage groove 32 re-enters the guide groove 31 for transport. The oil passage groove 32 on the guide vane 3 enables uniform transport of cooling oil, achieving a better cooling effect. Furthermore, reducing the diameter of the guide vane 3 effectively lowers costs.

[0043] The number of outer ring oil holes 21 is greater than the number of guide grooves 31. Since the guide grooves 31 do not directly communicate with the outer ring oil holes 21 along the axial direction, a larger number of outer ring oil holes 21 can be set so that the cooling oil flows through the outer ring oil holes 21 at a faster speed. A smaller number of guide grooves 31 can be set, and the cooling oil can still enter the guide grooves 31 from the oil passage 32. Since the number of guide grooves 31 is reduced relative to the number of outer ring oil holes 21, the pressure of the cooling oil after flowing through the guide grooves 31 increases, which is conducive to the cooling oil being discharged from the outlet of the second cooling oil passage. The cooling oil has a certain pressure spraying effect, and the spraying range is larger and more uniform.

[0044] In another embodiment, the diameter of the guide plate 3 is equal to the diameter of the oil passage plate 2. When the guide plate 3 and the oil passage plate 2 are in contact, the guide groove 31 and the outer ring oil hole 21 are connected axially. The number of guide grooves 31 is equal to the number of outer ring oil holes 21, so the function of the guide groove 31 can still be realized, effectively connecting the first cooling oil passage and the second cooling oil passage.

[0045] In one embodiment, one end of the guide groove 31 extends radially between adjacent stator slots 6, and the other end of the guide groove 31 is connected to the outer periphery of the guide plate 3.

[0046] The first inner ring oil hole 11 and the second inner ring oil hole 22 are correspondingly provided and are equal in number; the guide groove 31 and the second inner ring oil hole 22 are correspondingly provided and are equal in number; the second cooling oil channel is arranged along the axial direction to achieve rapid heat dissipation on the stator core near the stator slot 6.

[0047] The flow guide groove 31 is arranged radially on the flow guide plate 3, and the other end of the flow guide groove 31 is connected to the outer periphery of the flow guide plate 3. The manufacturing process of the flow guide groove 31 is simple, reducing the complexity of the opening of the flow guide groove 31.

[0048] In one embodiment, one end of the first inner ring oil hole 11, the second inner ring oil hole 22, and the guide groove 31 are all located between the bottoms of adjacent stator grooves 6.

[0049] Specifically, one end of the first inner ring oil hole 11, the second inner ring oil hole 22, and the guide groove 31 are all designed in the blank area of ​​the magnetic flux density of the stator core. The first inner ring oil hole 11, the second inner ring oil hole 22, and the guide groove 31 have as large a cross-section as possible and are close to the stator slot 6 without affecting the electromagnetic performance of the stator core.

[0050] In one embodiment, the stator core further includes an oil spray plate 4, which is disposed on both sides of the stator core along the axial direction, with one side of the oil spray plate 4 facing the outside of the stator core, and an oil channel plate 2 is disposed between the oil spray plate 4 and the guide plate 3.

[0051] The oil spray plate 4 is positioned towards the end of the stator winding 52, which can directly spray oil to cool the stator winding 52 without the need to arrange an additional oil spray ring structure on the stator core, thus simplifying the structure of the stator core and reducing the complexity of assembling the stator core.

[0052] In one embodiment, the fuel injector 4 is provided with a fuel injector hole 41 in the circumferential direction, and the fuel injector hole 41 communicates with at least a portion of the second inner ring fuel hole 22.

[0053] The number of oil injection holes 41 is less than the number of second inner ring oil holes 22. Specifically, the number of oil injection holes 41 is half the number of second inner ring oil holes 22. There is one stator slot 6 between two adjacent second inner ring oil holes 22, while there are two stator slots 6 between two adjacent oil injection holes 41. Obviously, the overall cross-section of the oil injection hole 41 is smaller than the overall cross-section of the second inner ring oil holes 22, so that sufficient pressure of cooling oil can be formed in the oil injection hole 41. The cooling oil sprayed from the oil injection hole 41 has a larger spray range and can be sprayed onto the stator winding 52 over a larger area, thereby allowing the stator winding 52 to dissipate heat fully.

[0054] Example 2

[0055] This embodiment provides a motor, including a motor housing 5 and a stator core as described in the above embodiment, such as... Figure 6 As shown, the stator core is installed inside the motor housing 5, and the motor housing 5 is provided with an oil inlet 51, which is corresponding to the oil inlet groove 12 of the stator core.

[0056] Oil duct plate 2, oil inlet plate 1, and guide plate 3 can be fixed by welding; oil duct plate 2 and oil spray plate 4 can be fixed by adhesive bonding. The stator core is assembled by combining the above two methods to ensure the form and position tolerance of the stator core and improve assembly efficiency.

[0057] The diameters of the oil spray plate 4 and the oil passage plate 2 are equal, and both the oil spray plate 4 and the oil passage plate 2 are interference-fitted with the inner wall of the motor housing 5; the diameters of the oil inlet plate 1 and the guide plate 3 are equal, and both are smaller than the oil spray plate 4, and both the oil inlet plate 1 and the guide plate 3 have gaps with the inner wall of the motor housing 5.

[0058] Cooling oil enters the stator core's oil inlet 12 through the motor housing 5 from the oil inlet 51. The cooling oil is then transported axially to both sides from the oil inlet 12. The cooling oil in the first cooling oil channel enters the second cooling oil channel through the guide groove 31, and finally sprays out from the outlet of the second cooling oil channel, i.e., the spray hole 41. The cooling oil flows through the stator core, achieving sufficient heat dissipation for the stator core. The cooling oil is sprayed onto the stator winding 52, achieving sufficient heat dissipation for the stator winding 52.

[0059] Example 3

[0060] This embodiment provides a vehicle, including the motor described in the above embodiments. The motor with a stator core in this embodiment has the same specific structure and implementation principle as the stator core provided in the above embodiments, and has the same technical effects, so it will not be described again here.

[0061] In the description of this application, it should be understood that the terms "center", "axial", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "joined," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0064] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A stator core characterized by: It includes an oil inlet plate (1), an oil passage plate (2), and a guide plate (3); the oil inlet plate (1), the oil passage plate (2), and the guide plate (3) are all arranged with stator slots (6) at intervals along their inner circumference. Multiple corresponding stator slots (6) extend along the axial direction of the stator core. The oil inlet plate (1) is provided with a first inner ring oil hole (11) between adjacent stator slots (6). The oil inlet plate (1) is provided with an oil inlet groove (12). The oil passage plate (2) is circumferentially provided with... An outer ring oil hole (21) is provided, and the oil inlet groove (12) is connected to the outer ring oil hole (21) to form a first cooling oil channel. A second inner ring oil hole (22) is provided on the oil channel plate (2) between adjacent stator slots (6). The first inner ring oil hole (11) and the second inner ring oil hole (22) are connected to form a second cooling oil channel. A guide groove (31) is provided circumferentially on the guide plate (3), and the first cooling oil channel and the second cooling oil channel are connected through the guide groove (31).

2. The stator core of claim 1, characterized by: The oil inlet plate (1) is provided with oil passage plates (2) on both sides. The outer periphery of the oil inlet plate (1) and the two oil passage plates (2) facing the oil inlet plate (1) together form the oil inlet groove (12).

3. The stator core of claim 1, characterized by: The oil inlet plate (1) is disposed on both sides of the stator core along the axial direction, the guide plate (3) is disposed in the middle and / or both sides of the stator core along the axial direction, and the oil passage plate (2) is disposed between the oil inlet plate (1) and the guide plate (3).

4. The stator core according to claim 1, characterized in that: The guide vane (3) is provided with oil passage plates (2) on both sides. The outer periphery of the guide vane (3) and the two oil passage plates (2) facing the guide vane (3) together form an oil passage groove (32). The oil passage groove (32) is connected to the outer ring oil hole (21) and the guide groove (31) respectively.

5. The stator core of claim 1, characterized by: One end of the guide groove (31) extends radially between adjacent stator slots (6), and the other end of the guide groove (31) is connected to the outer periphery of the guide plate (3).

6. The stator core of claim 1, characterized by: One end of the first inner ring oil hole (11), the second inner ring oil hole (22), and the guide groove (31) are all located between the bottoms of the adjacent stator grooves (6).

7. The stator core of claim 1, characterized by: It also includes an oil spray plate (4), which is disposed on both sides of the stator core along the axial direction, and the oil channel plate (2) is disposed between the oil spray plate (4) and the guide plate (3).

8. The stator core of claim 7, characterized by: The oil spray plate (4) is provided with an oil spray hole (41) in the circumferential direction, and the oil spray hole (41) is in communication with at least part of the second inner ring oil hole (22).

9. An electric machine characterized by: Includes the stator core as described in any one of claims 1-8.

10. A vehicle characterized by: Includes the motor as described in claim 9.

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