A stator assembly and axial magnetic field motor

Abstract

The present invention discloses a stator assembly and an axial magnetic field motor. When the stator assembly of the present invention is used, the coolant enters the outer ring cooling area at the head end of the cooling cycle from the liquid inlet, then enters the corresponding inner ring cooling area from the outer ring cooling area, enters the corresponding outer ring cooling area from the inner ring cooling area, and finally enters the outer ring cooling area at the end of the cooling cycle, and finally flows out from the liquid outlet. During this cooling cycle, the coolant can directly contact and exchange heat with the stator core during the flow of the outer ring cooling area and the inner ring cooling area, thereby improving the cooling efficiency of the motor and extending the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly to a stator assembly and an axial magnetic field motor. Background Art

[0002] The operating conditions of existing automobile drive motors are complex. Due to the structural characteristics of the motor itself, various losses will occur during the operation of the motor, causing the motor to heat up. In order to improve the working efficiency of the motor, a cooling system must be designed for the motor. There are two main types of cooling systems: air cooling and liquid cooling. Compared with air cooling, liquid cooling is more efficient. The existing liquid cooling system mainly adopts external cooling, that is, the coolant is in indirect contact with the core components to be cooled, and the cooling efficiency is low, which affects the service life of the motor. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is how to improve the cooling efficiency of the motor and extend the service life of the motor. To this end, the present invention provides a stator assembly and an axial magnetic field motor.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A stator assembly comprises a housing and a stator core disposed inside the housing; wherein the stator core and the housing enclose a first cooling space, and the middle portion of the stator core encloses a second cooling space;

[0006] N first baffles are arranged in the first cooling space, and the first baffles divide the first cooling space into N outer ring cooling areas;

[0007] M second baffles are arranged in the second cooling space, and the plurality of second baffles divide the second cooling space into M inner ring cooling areas, wherein NM=1, the second baffles are arranged alternately with the first baffles, and the plurality of inner ring cooling areas and the corresponding outer ring cooling areas form a cooling cycle; and

[0008] A liquid inlet and a liquid outlet are arranged on the shell, wherein the liquid inlet is communicated with a first cold area at the head end of the cooling cycle, and the liquid outlet is communicated with an outer ring cooling area at the end of the cooling cycle.

[0009] In one embodiment of the present invention, a plurality of cooling channels are provided on the stator core, and the cooling channels are connected to the first cooling space and the second cooling space.

[0010] In one embodiment of the present invention, the cooling channel is a through hole penetrating the stator core.

[0011] In one embodiment of the present invention, the cooling channel is a groove provided on the end surface of the stator core and is surrounded by the housing.

[0012] In one embodiment of the present invention, there are multiple shells, each of which corresponds to one stator core, and in two adjacent shells, the liquid outlet of the former shell is connected to the liquid inlet of the latter shell.

[0013] In one embodiment of the present invention, in two adjacent shells, the liquid outlet of the former shell is coaxially arranged with the liquid inlet of the latter shell.

[0014] In one embodiment of the present invention, the number of the housings is two, namely a front housing and a rear housing; the number of the stator cores is two, namely a front stator core and a rear stator core.

[0015] In one embodiment of the present invention, the front stator core is enclosed in a space surrounded by the front housing and the front stator pressure plate through a front stator pressure plate.

[0016] In one embodiment of the present invention, the rear stator core is enclosed in a space surrounded by the rear housing and the rear stator pressure plate through a rear stator pressure plate.

[0017] In one embodiment of the present invention, an axial magnetic field motor is disclosed, comprising a stator assembly as described in any one of the above items.

[0018] It can be seen from the above technical solution that when the stator assembly of the present invention is used, the coolant enters the outer ring cooling area at the head end of the cooling cycle from the liquid inlet, then enters the corresponding inner ring cooling area from the outer ring cooling area, enters the corresponding outer ring cooling area from the inner ring cooling area, and finally enters the outer ring cooling area at the end of the cooling cycle, and finally flows out from the liquid outlet. During this cooling cycle, the coolant can directly contact and exchange heat with the stator core during the flow of the outer ring cooling area and the inner ring cooling area, thereby improving the cooling efficiency of the motor and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a stator assembly provided by an embodiment of the present invention;

[0021] Figure 2 A schematic cross-sectional view of a stator assembly provided by an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a stator assembly provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a three-dimensional structure of a stator core provided by an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the three-dimensional structure of another stator core provided by an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of an exploded structure of a stator assembly provided by an embodiment of the present invention;

[0026] In the figure, 100 is a housing, 200 is a stator core, 300 is a first cooling space, 400 is a second cooling space, 500 is a first spoiler, 600 is a second spoiler, 700 is a stator pressure plate, 101 is a liquid inlet, 102 is a liquid outlet, 201 is a cooling channel, 301 is a first outer ring cooling area, 302 is a second outer ring cooling area, 303 is a third outer ring cooling area, 304 is a fourth outer ring cooling area, 401 is a first inner ring cooling area, 402 is a second inner ring cooling area, and 403 is a third inner ring cooling area;

[0027] 100-1 is the front housing, 200-1 is the front stator core, 500-1 is the front first spoiler, 600-1 is the front second spoiler, and 700-1 is the front stator pressure plate; 100-2 is the rear housing, 200-2 is the rear stator core, 500-2 is the rear first spoiler, 600-2 is the rear second spoiler, and 700-2 is the rear stator pressure plate. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide a stator assembly and an axial magnetic field motor to improve the cooling efficiency of the motor and extend the service life of the motor.

[0029] In addition, the embodiments shown below do not limit the invention described in the claims in any way. In addition, all the contents of the configurations shown in the embodiments below are not limited to the solutions required as the invention described in the claims.

[0030] See also Figures 1 to 6 The stator assembly in the embodiment of the present invention includes a housing 100 and a stator core 200 disposed inside the housing 100; wherein the stator core 200 and the housing 100 enclose a first cooling space 300, and the middle of the stator core 200 encloses a second cooling space 400;

[0031] N first baffles 500 are arranged in the first cooling space 300, and the first baffles 500 divide the first cooling space 300 into N outer ring cooling areas;

[0032] M second spoilers 600 are arranged in the second cooling space 400, and the second spoilers 600 divide the second cooling space 400 into M inner ring cooling areas, wherein NM=1, the second spoilers 600 and the first spoilers 500 are arranged alternately, and the multiple inner ring cooling areas and the corresponding outer ring cooling areas form a cooling cycle; and

[0033] The liquid inlet 101 and the liquid outlet 102 are arranged on the housing 100. The liquid inlet 101 is connected to the first cold area at the head end of the cooling cycle, and the liquid outlet 102 is connected to the outer ring cooling area at the end of the cooling cycle.

[0034] When the stator assembly of the present invention is used, the coolant enters the outer ring cooling area at the head end of the cooling cycle from the liquid inlet 101, then enters the corresponding inner ring cooling area from the outer ring cooling area, enters the corresponding outer ring cooling area from the inner ring cooling area, and finally enters the outer ring cooling area at the end of the cooling cycle, and finally flows out from the liquid outlet 102. During this cooling cycle, the coolant can directly contact and exchange heat with the stator core 200 during the flow of the outer ring cooling area and the inner ring cooling area, thereby improving the cooling efficiency of the motor and extending the service life of the motor.

[0035] In the embodiment of the present invention, the first spoiler 500 and the second spoiler 600 are provided to allow the coolant to flow along a specific trajectory, thereby extending the contact time between the coolant and the stator core 200, and at the same time allowing the coolant to contact most of the stator core 200, so that the temperature on the stator core 200 is more uniform.

[0036] For example: Please refer to Figure 3 As shown, in the embodiment of the present invention, the four first baffles 500 divide the first cooling space 300 into four outer ring cooling areas, namely the first outer ring cooling area 301, the second outer ring cooling area 302, the third outer ring cooling area 303 and the fourth outer ring cooling area 304. The four outer ring cooling areas are arranged in sequence along the circumferential direction, wherein the first outer ring cooling area 301 is located at the head end of the cooling cycle, the fourth outer ring cooling area 304 is located at the end of the cooling cycle, the first outer ring cooling area 301 is connected to the liquid inlet 101, and the fourth outer ring cooling area 304 is connected to the liquid outlet 102.

[0037] In the embodiment of the present invention, the three second spoilers 600 divide the second cooling space 400 into three inner ring cooling areas, namely a first inner ring cooling area 401 , a second inner ring cooling area 402 and a third inner ring cooling area 403 .

[0038] Among them, the coolant enters the first outer ring cooling area 301 through the liquid inlet 101, then enters the first inner ring cooling area 401 from the first outer ring cooling area 301, then enters the second outer ring cooling area 302 from the first inner ring cooling area 401, then enters the second inner ring cooling area 402 from the second outer ring cooling area 302, then enters the third outer ring cooling area 303 from the second inner ring cooling area 402, then enters the third inner ring cooling area 403 from the third outer ring cooling area 303, then enters the fourth outer ring cooling area 304 from the third inner ring cooling area 403, and finally flows out from the liquid outlet 102, completing a cooling cycle.

[0039] The above is a specific introduction taking N=4, M=3 as an example. The embodiments of the present invention are not limited to the above forms. As long as the embodiments of the present invention can constitute a first baffle 500 and a second baffle 600 that perform cyclic cooling according to a specific trajectory, they are within the protection scope of the present invention.

[0040] The coolant in the first cooling space 300 and the coolant in the second cooling space 400 can be connected through the gap between the coils of the stator core 200, or a plurality of cooling channels 201 are provided on the stator core 200, and the cooling channels 201 connect the first cooling space 300 and the second cooling space 400. The function of the cooling channel 201 is to connect the first cooling space 300 and the second cooling space 400. At the same time, the coolant in the cooling channel 201 directly contacts the stator core 200, and directly takes away the heat generated by the stator core 200. For example: the cooling channel 201 is a through hole that penetrates the stator core 200, and the cross-section of the through hole is circular, elliptical, rectangular, etc. Or the cooling channel 201 is a groove arranged on the end surface of the stator core 200 and is surrounded by the housing 100. It can be understood that: a groove is provided on the end surface of the stator core 200, and the corresponding housing 100 is a planar structure; the cooling channel 201 is surrounded by the groove and the surface of the housing 100; or a groove is provided on the stator core 200, and a groove is provided on the surface of the corresponding housing 100, and the two grooves are connected to form the cooling channel 201. The cooling channel is a through hole that penetrates the stator core; or the cooling channel is a groove provided on the end surface of the stator core and surrounded by the housing.

[0041] The stator assembly includes a plurality of housings 100, each housing 100 correspondingly being equipped with a stator core 200. All the plurality of housings 100 may be two housings 100, three housings 100, four housings 100, and the like. The plurality of housings 100 are coaxially arranged, that is, the end faces of adjacent housings 100 are in contact with the end faces. The number of housings 100 may be determined according to the size of the output power. In two adjacent housings, the liquid outlet of the preceding housing is connected to the liquid inlet of the succeeding housing.

[0042] In two adjacent housings 100, the liquid outlet 102 of one housing 100 is connected to the liquid inlet 101 of the other housing 100. The connection can be made through an external pipeline, or the liquid inlet 101 of one housing 100 is coaxially arranged with the liquid outlet 102 of the other housing 100. That is, the liquid outlet 102 and the liquid inlet 101 are both arranged on the end surface, and when the two housings 100 are butt-jointed, the liquid outlet 102 and the liquid inlet 101 are automatically connected.

[0043] Taking two shells 100 as an example, the liquid outlet 102 of one shell 100 is set on the end surface, and the liquid inlet 101 of the other shell 100 is set on the end surface. When the two shells 100 are docked, the liquid outlet 102 of the front shell 100 is connected to the liquid inlet 101 of the rear shell 100.

[0044] In the multiple shells 100, the liquid inlet 101 of the shell 100 at one end and the liquid outlet 102 of the shell 100 at the other end may be located on the end surface of the corresponding shell 100, or may be located on the peripheral surface of the corresponding shell 100. Preferably, in order to facilitate the installation of subsequent parts, in the embodiment of the present invention, the liquid inlet 101 of the shell 100 at one end and the liquid outlet 102 of the shell 100 at the other end are both arranged on the peripheral surface of the shell 100, and further, the liquid inlet 101 of the shell 100 at one end and the liquid outlet 102 of the shell 100 at the other end are both arranged on the same side.

[0045] In order to prevent liquid leakage, in the embodiment of the present invention, the stator core 200 is enclosed in a space surrounded by the housing 100 and the stator pressing plate 700 through the stator pressing plate 700 .

[0046] In another embodiment of the present invention, there are two housings 100, namely, a front housing 100-1 and a rear housing 100-2; there are two stator cores 200, namely, a front stator core 200-1 and a rear stator core 200-2. The structures of the front housing 100-1 and the rear housing 100-2 refer to the above embodiments.

[0047] In order to prevent liquid leakage, in the embodiment of the present invention, the front stator core 200 - 1 is enclosed in the space surrounded by the front housing 100 - 1 and the front stator pressure plate 700 - 1 through the front stator pressure plate 700 - 1 .

[0048] A front first spoiler 500-1 is arranged between the front housing 100-1 and the front stator core 200-1, and the front first spoiler 500-1 divides the first cooling space into multiple outer ring cooling areas. A front second spoiler 600-1 is arranged in the second cooling space surrounded by the front stator core 200-1, and the front second spoiler 600-1 divides the second cooling space into multiple inner ring cooling areas.

[0049] In order to prevent liquid leakage, in the embodiment of the present invention, the rear stator core 200 - 2 is enclosed in the space surrounded by the rear housing 100 - 2 and the rear stator pressure plate 700 - 2 through the rear stator pressure plate 700 - 2 .

[0050] A rear first spoiler 500-2 is arranged between the rear shell body 100-2 and the rear stator core 200-2, and the rear first spoiler 500-2 divides the first cooling space into multiple outer ring cooling areas. The second cooling space surrounded by the rear stator core 200-2 is provided with a rear second spoiler 600-2, and the rear second spoiler 600-2 divides the second cooling space into multiple inner ring cooling areas.

[0051] The present invention also discloses an axial magnetic field motor, comprising a stator assembly as described above. Since the stator assembly has the above beneficial effects, the axial magnetic field motor including the stator assembly also has corresponding effects, which will not be described in detail here.

[0052] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stator assembly, characterized in that: The invention comprises a housing and a stator core disposed inside the housing; wherein the stator core and the housing enclose a first cooling space, and the middle part of the stator core encloses a second cooling space; N first baffles are arranged in the first cooling space, and the first baffles divide the first cooling space into N outer ring cooling areas; M second baffles are arranged in the second cooling space, and the second baffles divide the second cooling space into M inner ring cooling areas, wherein NM=1; The stator core is provided with a plurality of cooling channels, wherein the cooling channels are connected with the first cooling space and the second cooling space; Among them, one of the first baffles and one of the second baffles are arranged between the circumferential angles enclosed by two adjacent cooling channels; the remaining first baffles and the second baffles are arranged alternately in the circumferential direction of the stator core, and a plurality of the inner ring cooling areas and the corresponding outer ring cooling areas constitute a cooling cycle; and a liquid inlet and a liquid outlet are arranged on the shell, the liquid inlet is connected to the first cold area located at the head end of the cooling cycle, and the liquid outlet is connected to the outer ring cooling area located at the end of the cooling cycle.

2. The stator assembly according to claim 1, characterized in that The cooling channel is a through hole penetrating the stator core.

3. The stator assembly according to claim 1, characterized in that The cooling channel is a groove arranged on the end surface of the stator core and is surrounded by the housing.

4. The stator assembly according to claim 1, characterized in that There are multiple shells, each of which corresponds to a stator core, and in two adjacent shells, the liquid outlet of the former shell is connected to the liquid inlet of the latter shell.

5. The stator assembly according to claim 4, characterized in that In two adjacent shells, the liquid outlet of the former shell is coaxially arranged with the liquid inlet of the latter shell.

6. The stator assembly according to claim 5, characterized in that The number of the housings is two, namely a front housing and a rear housing; the number of the stator cores is two, namely a front stator core and a rear stator core.

7. The stator assembly according to claim 6, characterized in that The front stator core is enclosed in a space surrounded by the front housing and the front stator pressure plate through the front stator pressure plate.

8. The stator assembly according to claim 7, characterized in that The rear stator core is enclosed in a space surrounded by the rear housing and the rear stator pressing plate through the rear stator pressing plate.

9. An axial magnetic field motor, characterized in that: Comprising a stator assembly as claimed in any one of claims 1 to 8.

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