Motor and vehicle

Abstract

The utility model discloses a motor and a vehicle. The motor comprises a stator core, a winding, an oil injection ring and an end cover. The stator core comprises a first end and a second end which are oppositely arranged. A stator groove penetrates through the first end and the second end. And a cooling channel is arranged in the stator slot. And the winding is arranged in the stator slot. The winding comprises a wire outlet end winding and a non-wire outlet end winding. The wire outlet end winding is arranged at the first end. The non-leading-out end winding is arranged at the second end. And the cooling channel is communicated with the leading-out terminal winding and the non-leading-out terminal winding. And the oil injection ring is arranged at the wire outlet end winding. And the oil spraying ring is used for spraying the cooling liquid to the wire outlet end winding. The end cover covers the second end and forms an accommodating cavity. And the non-leading-out terminal winding is positioned in the accommodating cavity. And a liquid inlet is formed in the circumferential direction of the end cover. And the liquid inlet is communicated with the accommodating cavity. The winding can be rapidly cooled, the speed of the cooling liquid in the containing cavity flowing into the cooling channel is increased, and the temperature of all parts of the winding is more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor and a vehicle. Background Art

[0002] As the power density of the motor gradually increases, the heat generated by the motor is also rising rapidly. The heat dissipation problem has become an important factor restricting the further improvement of the power density of the motor. The existing motor is provided with end shields at both ends of the stator, and coolant is provided in the end shields at both ends. The windings at the ends of the stator are immersed in the coolant to achieve cooling. However, since the end shields at both ends of the stator seal the ends of the stator windings, the coolant in the end shields at both ends of the stator has a large flow resistance problem. The coolant in the end shields has a slow flow rate and cannot cool the windings in the stator core, so that the stator windings cannot be evenly cooled, resulting in poor heat dissipation of the stator windings, and the power density of the motor cannot be further improved. Utility Model Content

[0003] The present application provides a motor and a vehicle to solve the technical problem of poor heat dissipation of stator windings.

[0004] To solve the above technical problems, the present application proposes a motor, comprising: a stator core, comprising a first end and a second end arranged opposite to each other, a stator slot extending between the first end and the second end, and a cooling channel arranged in the stator slot; a winding, arranged in the stator slot, the winding comprising an output terminal winding and a non-output terminal winding, the output terminal winding is arranged at the first end, the non-output terminal winding is arranged at the second end, and the cooling channel connects the output terminal winding and the non-output terminal winding; an oil spray ring, arranged at the output terminal winding, the oil spray ring is used to spray coolant to the output terminal winding; an end cover, the cover is arranged at the second end and forms a accommodating cavity, the non-output terminal winding is located in the accommodating cavity, and a liquid inlet is arranged circumferentially of the end cover, and the liquid inlet is connected to the accommodating cavity.

[0005] The cooling channel is arranged at an end of the stator slot away from the center of the stator core.

[0006] Wherein, the cross-sectional shape of the cooling channel along the direction perpendicular to the axial direction of the stator core is at least one of an arc shape, a triangle shape and a square shape.

[0007] Among them, the compensation part is arranged on the outer periphery of the stator core, and the volume of the compensation part is greater than or equal to the volume of the cooling channel.

[0008] The compensating portion is arranged to extend axially along the stator core.

[0009] Wherein, the insulating member is arranged between the inner wall of the stator slot and the winding.

[0010] Among them, a plurality of oil injection holes are arranged circumferentially of the oil injection ring, and the oil injection holes are arranged toward the outlet winding.

[0011] Wherein, the sealing member is arranged between the end cover and the second end, and the sealing member seals the accommodating cavity.

[0012] Among them, the shell is arranged on the outer periphery of the stator core, an oil channel is arranged between the inner wall of the shell and the stator core, and the oil channel connects the shell and the oil injection ring.

[0013] In order to solve the above technical problems, the present application proposes a vehicle, comprising the above motor.

[0014] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a motor and a vehicle. The motor includes a stator core, a winding, an oil spray ring and an end cover. The stator core includes a first end and a second end that are arranged opposite to each other. A stator slot is provided between the first end and the second end. A cooling channel is provided in the stator slot. The winding is provided in the stator slot. The winding includes an output terminal winding and a non-output terminal winding. The output terminal winding is provided at the first end. The non-output terminal winding is provided at the second end. The cooling channel connects the output terminal winding and the non-output terminal winding. The oil spray ring is provided at the output terminal winding. The oil spray ring is used to spray coolant to the output terminal winding. The end cover is provided at the second end and forms a receiving cavity. The non-output terminal winding is located in the receiving cavity. A liquid inlet is provided in the circumference of the end cover. The liquid inlet is connected to the receiving cavity. By setting different cooling methods for the output-end winding and the non-output-end winding, the winding can be cooled quickly, and the speed at which the coolant in the accommodating cavity flows into the cooling channel can be increased, so that the temperature of each part of the winding is more uniform, the power density and efficiency of the motor are improved, and the service life of the motor is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a motor of the present application;

[0017] Figure 2 is a cross-sectional schematic diagram of an embodiment of a stator core of the present application;

[0018] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0019] Figure 4 It is a structural schematic diagram of an embodiment of a stator slot of the present application;

[0020] Figure 5 is a structural schematic diagram of another embodiment of the stator slot of the present application;

[0021] Figure 6 It is a structural schematic diagram of an embodiment of an oil injection ring of the present application.

[0022] Figure numbers: 100, motor; 1, stator core; 11, first end; 13, second end; 15, stator slot; 17, cooling channel; 2, winding; 21, output end winding; 23, non-output end winding; 3, injection ring; 31, injection hole; 4, end cover; 41, accommodating chamber; 43, liquid inlet; 5, compensation part; 6, insulating part; 7, sealing part. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The motor and vehicle provided by the utility model are described in detail below in conjunction with the embodiments.

[0026] See also Figures 1 to 3 , Figure 1 It is a structural schematic diagram of an embodiment of a motor of the present application; Figure 2 is a cross-sectional schematic diagram of an embodiment of a stator core of the present application; Figure 3 yes Figure 2 The enlarged schematic diagram of A in FIG. The present application provides a motor 100 . The motor 100 includes a stator core 1 , a winding 2 , an oil injection ring 3 and an end shield 4 .

[0027] The stator core 1 includes a first end 11 and a second end 13 which are arranged opposite to each other. A stator slot 15 is provided between the first end 11 and the second end 13. The inner wall of the stator core 1 is provided with a plurality of stator slots 15, which are distributed radially along the stator core 1 and extend axially along the stator core 1. A cooling channel 17 is provided in the stator slot 15. The cooling channel 17 is used to guide the flow of coolant.

[0028] The winding 2 is at least partially arranged in the stator slot 15. The winding 2 includes an output terminal winding 21 and a non-output terminal winding 23. One end of the winding 2 connected to the external circuit is the output terminal winding 21, and the remaining part is the non-output terminal winding 23. The output terminal winding 21 and the non-output terminal winding 23 are arranged opposite to each other. The output terminal winding 21 is arranged at the first end 11. The winding 2 extends and protrudes from the inside of the stator slot 15 to the first end 11 to form the output terminal winding 21. The non-output terminal winding 23 is arranged at the second end 13. The winding 2 extends and protrudes from the inside of the stator slot 15 to the second end 13 to form the non-output terminal winding 23. The cooling channel 17 connects the output terminal winding 21 and the non-output terminal winding 23.

[0029] The oil spray ring 3 is arranged on the outlet winding 21. The oil spray ring 3 is used to spray the cooling liquid to the outlet winding 21, and the cooling liquid cools the outlet winding 21.

[0030] The end cover 4 covers the second end 13 and forms a receiving chamber 41. The non-outgoing line end winding 23 is located in the receiving chamber 41 and is isolated from the outside. The cooling channel 17 is connected to the receiving chamber 41. The cooling channel 17 is distributed along the axial direction of the stator core 1. The coolant flows into the cooling channel 17 to cool the stator core 1 and the non-outgoing line end winding 23 in the stator slot 15. A liquid inlet 43 is provided in the circumference of the end cover 4. The liquid inlet 43 is connected to the receiving chamber 41. The coolant flows into the receiving chamber 41 through the liquid inlet 43 to cool the non-outgoing line end winding 23 in the receiving chamber 41. The receiving chamber 41 connects the liquid inlet 43 with the cooling channel 17. The coolant can flow from the receiving chamber 41 into the cooling channel 17 to further cool the non-outgoing line end winding 23 in the stator slot 15. After the coolant completes cooling the non-outgoing line end winding 23 in the stator slot 15, the coolant flows out from the cooling channel 17 close to the first end 11.

[0031] In the above manner, the oil spray ring 3 is arranged to spray the coolant to the outlet winding 21 to meet the cooling of the outlet winding 21. The coolant flows into the accommodating chamber 41 through the oil inlet to cool the non-outgoing winding 23 in the accommodating chamber 41. When the coolant in the accommodating chamber 41 is full, the coolant flows into the cooling channel 17 through the accommodating chamber 41 to cool the non-outgoing winding 23 in the stator core 1 and the stator slot 15. Different cooling methods are respectively arranged for the outlet winding 21 and the non-outgoing winding 23, so that the winding 2 can be quickly cooled, and the speed at which the coolant in the accommodating chamber 41 flows into the cooling channel 17 can be increased, so that the temperature of each part of the winding 2 is more uniform, the power density and efficiency of the motor 100 are improved, and the service life of the motor 100 is extended.

[0032] The method of setting the cooling channel 17 in the stator slot 15 can be set according to actual conditions and is not limited here. In one embodiment, the cooling channel 17 is set at one end of the stator slot 15 close to the center of the stator core 1. In another embodiment, a cooling channel 17 is set on both sides of the stator slot 15 close to the stator core 1 and away from the stator core 1.

[0033] In another embodiment, Figure 2 As shown, the cooling channel 17 is provided at one end of the stator slot 15 away from the center of the stator core 1. The stator slot 15 extends and protrudes perpendicular to the axial direction of the stator core 1 to form the cooling channel 17. The coolant passes through the cooling channel 17, and the coolant contacts the stator core 1 and the winding 2, and cools and dissipates the stator core 1 and the winding 2 in the stator slot 15, thereby enhancing the heat dissipation effect of the winding 2 in the stator slot 15, making the temperature of each part of the winding 2 more uniform, further improving the power density and efficiency of the motor 100, and extending the service life of the motor 100.

[0034] See also Figures 3 to 5 , Figure 4 It is a structural schematic diagram of an embodiment of a stator slot of the present application; Figure 5 1 is a schematic diagram of the structure of another embodiment of the stator slot of the present application. The number and shape of the cooling channel 17 can also be set according to actual conditions and are not limited here. The cross-sectional shape of the cooling channel 17 along the direction perpendicular to the axial direction of the stator core 1 is at least one of an arc, a triangle, and a square. Figure 3 As shown, the cross-sectional shape of the cooling channel 17 along the direction perpendicular to the axial direction of the stator core 1 is an arc shape. Figure 4 As shown, the cross-sectional shape of the cooling channel 17 along the direction perpendicular to the axial direction of the stator core 1 is triangular. The sizes of the cooling channels 17 can be the same or different. The number of cooling channels 17 includes but is not limited to one, two, three, six, etc. Figure 5 As shown, the number of cooling channels 17 is two.

[0035] See also Figure 2 and Figure 3 In one embodiment, the motor 100 further includes a compensation portion 5. The compensation portion 5 is used to compensate for the effective volume of the stator core 1 reduced by the cooling channel 17. The compensation portion 5 is arranged at the outer periphery of the stator core 1. The outer periphery of the stator core 1 protrudes toward a side away from the center of the stator core 1 to form the compensation portion 5. The volume of the compensation portion 5 is greater than or equal to the volume of the cooling channel 17.

[0036] By providing the compensation part 5 to compensate for the effective volume of the stator core 1 reduced by the cooling channel 17, the coolant can cool the stator core 1 and the winding 2 through the cooling channel 17 while reducing the influence of the reduction in the effective volume of the stator core 1 on the power and torque of the motor 100.

[0037] The volume, number and shape of the compensation part 5 can be set according to actual conditions and are not limited here. The volume of the compensation part 5 can be equal to the volume of the cooling channel 17. The volume of the compensation part 5 can also be greater than the volume of the cooling channel 17. The number of compensation parts 5 can be the same as the number of cooling channels 17, or can be different from the number of cooling channels 17. The shape of the compensation part 5 can be the same as the shape of the cooling channel 17. The shape of the compensation part 5 can also be different from the shape of the cooling channel 17. For example, the cross-sectional shape of the cooling channel 17 along the direction perpendicular to the axial direction of the stator core 1 is at least one of a circular arc, a triangle, and a square, and the cross-sectional shape of the compensation part 5 along the direction perpendicular to the axial direction of the stator core 1 can also be at least one of a circular arc, a triangle, and a square.

[0038] In one embodiment, the compensation portion 5 is arranged to extend axially along the stator core 1. The shape of the compensation portion 5 extending axially along the stator core 1 can be a straight line, for example, the shape of the compensation portion 5 on the outer periphery of the stator core 1 is similar to a strip or an elongated rectangle. The shape of the compensation portion 5 extending axially along the stator core 1 can also be a dot, a wavy line, a spiral line, a branch line, a grid, etc., which is not limited here. By such a configuration, the heat dissipation efficiency of the stator core 1 is improved, and the effective volume of the stator core 1 is maximized.

[0039] See also Figures 3 to 5 In one embodiment, the motor 100 includes an insulating member 6. The insulating member 6 is disposed in the stator slot 15. The insulating member 6 is disposed between the inner wall of the stator slot 15 and the winding 2. The insulating member 6 wraps the portion of the winding 2 located in the stator slot 15. Thus, the winding 2 is wrapped by the insulating member 6, and is not prone to accidental short circuit, so that the performance of the motor 100 remains stable.

[0040] The type and arrangement of the insulating member 6 can be set according to actual conditions and are not limited here. The types of the insulating member 6 include but are not limited to insulating paper, insulating film, insulating varnished cloth, etc. In one specific embodiment, the insulating member 6 is inserted between the stator slot 15 and the winding 2. In another specific embodiment, the insulating member 15 is wrapped around the wire of the winding 2. In another specific embodiment, insulating varnish is injected between the stator slot 15 and the winding 2.

[0041] The manner in which the oil injection ring 3 is arranged on the outlet winding 21 can be arranged according to actual conditions and is not limited here. Figure 6 , Figure 6 Schematic diagram of the structure of an embodiment of the oil injection ring of the present application. In one embodiment, the oil injection ring 3 is circumferentially provided with a plurality of oil injection holes 31. The oil injection holes 31 are arranged toward the outlet winding 21. After the coolant reaches the oil injection ring 3, it is sprayed to the outlet winding 21 through the oil injection holes 31, and the coolant cools the outlet winding 21.

[0042] The oil spray ring 3 is arranged on the outlet winding 21, so as to facilitate the direct spraying of the coolant to the outlet winding 21. The coolant can effectively absorb and carry away the heat generated by the outlet winding 21, further improving the working efficiency and life of the motor 100. Compared with the method of sealing the outlet winding 21, the oil spray ring 3 is arranged on the outlet winding 21, so as to solve the problems of poor sealing and poor processability of the end cover 4 to the outlet winding 21 in the prior art.

[0043] The number and size of the oil injection holes 31 can be set according to actual conditions and are not limited here. The number of the oil injection holes 31 can be set to one, five, eight, twelve, fifteen or more. The diameters of the oil injection holes 31 can be the same or different. The shapes of the oil injection holes 31 include but are not limited to circular, square, triangular or polygonal shapes.

[0044] See also Figure 1 In one embodiment, the motor 100 includes a seal 7. The seal 7 is disposed between the end shield 4 and the second end 13. The seal 7 fills the gap between the end shield 4 and the second end 13, thereby improving the sealing effect between the end shield 4 and the second end 13. The seal 7 seals the accommodating chamber 41, and the coolant in the accommodating chamber 41 is not easy to leak. The cooling effect of the coolant in the accommodating chamber 41 on the non-outgoing terminal winding 23 is further improved, so that the performance of the motor 100 remains stable. The seal 7 includes but is not limited to an O-ring, an elastic sealing ring, and the like.

[0045] In one embodiment, the motor 100 includes a housing (not shown). The housing is disposed on the outer periphery of the stator core 1. The stator core 1 is located inside the housing. An oil passage (not shown) is provided between the inner wall of the housing and the stator core 1. The oil passage connects the housing and the oil injection ring 3. The oil passage is used to supply oil to the liquid inlet 43 and the oil injection ring 3. The liquid inlet 43 and the oil injection ring 3 may share the same oil passage, or the liquid inlet 43 and the oil injection ring 3 may be connected to their respective corresponding oil passages.

[0046] In the process of cooling the stator winding 2, the coolant enters the liquid inlet 43 and the oil spray ring 3 through the oil passage, and the oil flows into the accommodating chamber 41 through the liquid inlet 43 to cool the non-outgoing winding 23. After the coolant in the accommodating chamber 41 is full, the coolant passes through the accommodating chamber 41, such as the cooling channel 17, to cool the non-outgoing winding 23 in the stator core 1 and the stator slot 15. At the same time, the oil spray ring 3 sprays the coolant to the outgoing winding 21. After the coolant cools the winding 2, it flows out from the outlet.

[0047] The housing can be arranged in a manner according to actual conditions and is not limited here. In one specific embodiment, the end cover 4 can be arranged in the housing. In another specific embodiment, the end cover 4 is arranged in one piece with the housing.

[0048] In another aspect of the present application, a vehicle is provided. The vehicle includes the motor 100 in any of the above embodiments. The output terminal winding 21 and the non-output terminal winding 23 of the stator of the motor 100 both have good heat dissipation effect, which reduces the restriction of heat dissipation problem on the power density of the motor 100, and is conducive to the motor 100 providing a stronger driving force for the vehicle.

[0049] The terms "first", "second", "third" in this application are only used for descriptive purposes and cannot be understood as indicating the quantity of the indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of these features. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative positional relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "include" and "have" and any of their variations are intended to cover non-exclusive inclusions. The process, method, system, product or equipment such as including a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0050] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A motor, characterized in that: include: The stator core comprises a first end and a second end which are arranged opposite to each other, a stator slot is formed between the first end and the second end, and a cooling channel is formed in the stator slot; A winding is arranged in the stator slot, the winding includes an output end winding and a non-output end winding, the output end winding is arranged at the first end, the non-output end winding is arranged at the second end, and the cooling channel connects the output end winding and the non-output end winding; An oil spray ring, arranged at the outlet winding, and used for spraying coolant to the outlet winding; An end cover is provided at the second end to form a containing cavity, the non-outgoing line end winding is located in the containing cavity, and a liquid inlet is provided in the circumference of the end cover, and the liquid inlet is communicated with the containing cavity.

2. The motor according to claim 1, characterized in that The cooling channel is arranged at an end of the stator slot away from the center of the stator core.

3. The motor according to claim 2, characterized in that The cross-sectional shape of the cooling channel along the direction perpendicular to the axial direction of the stator core is at least one of an arc shape, a triangle shape and a square shape.

4. The motor according to claim 1, characterized in that include: A compensation part is arranged on the outer periphery of the stator core, and the volume of the compensation part is greater than or equal to the volume of the cooling channel.

5. The motor according to claim 4, characterized in that The compensation portion is arranged to extend axially along the stator core.

6. The motor according to claim 1, characterized in that include: The insulating member is arranged between the inner wall of the stator slot and the winding.

7. The motor according to claim 1, characterized in that The oil injection ring is circumferentially provided with a plurality of oil injection holes, and the oil injection holes are arranged toward the outlet terminal winding.

8. The motor according to claim 1, characterized in that include: A sealing member is disposed between the end cover and the second end, and the sealing member seals the accommodating cavity.

9. The motor according to claim 1, characterized in that include: A shell is arranged on the outer periphery of the stator core, an oil passage is arranged between the inner wall of the shell and the stator core, and the oil passage communicates the shell with the oil injection ring.

10. A vehicle, characterized in that: The invention comprises a motor as claimed in any one of claims 1 to 9.

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