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 liquid inlet cavity from the liquid inlet, enters the first cooling space through the first intermediate liquid inlet, then enters the second cooling space through the cooling channel, then enters the first cooling space through the cooling channel, then enters the liquid outlet cavity through the second intermediate liquid inlet, and finally flows out from the liquid outlet. The coolant can directly contact and exchange heat with the stator core in the process of flowing in the first cooling space, the cooling channel and the second cooling space, 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 arranged 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] The shell is provided with a liquid inlet cavity and a liquid outlet cavity;

[0007] The outer wall of the shell is provided with a liquid inlet communicated with the liquid inlet cavity and a liquid outlet communicated with the liquid outlet cavity;

[0008] The inner wall of the shell is provided with a first intermediate liquid port communicating with the liquid inlet cavity and a second intermediate liquid port communicating with the liquid outlet cavity; and

[0009] The stator core is provided with a plurality of cooling channels, and the cooling channels are connected with the first cooling space and the second cooling space.

[0010] In yet another embodiment of the present invention, a baffle is provided between the housing and the stator core to separate the first cooling space.

[0011] In another embodiment of the present invention, there are two baffles, which are symmetrically arranged, and the baffles divide the first cooling space into a first cooling area and a second cooling area, wherein the first cooling area is connected to the liquid inlet cavity through a first intermediate liquid port, and the second cooling area is connected to the liquid outlet cavity through a second intermediate liquid port.

[0012] In yet another embodiment of the present invention, the stator core is enclosed in a space enclosed by the housing and the stator pressure plate through a stator pressure plate.

[0013] In yet another embodiment of the present invention, the cooling channel is a through hole penetrating the stator core.

[0014] In yet another embodiment of the present invention, the cooling channel is a groove provided on the end surface of the stator core.

[0015] In yet another embodiment of the present invention, there are multiple shells, and among the multiple shells, the liquid outlet of a preceding shell is connected to the liquid inlet of a succeeding shell.

[0016] In yet another embodiment of the present invention, in two adjacent shells, the liquid inlet of one shell is coaxially arranged with the liquid outlet of the other shell.

[0017] In yet another 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.

[0018] An axial magnetic field motor comprises a stator assembly as described in any one of the above items.

[0019] It can be seen from the above technical solution that when the stator assembly of the present invention is used, the coolant enters the liquid inlet cavity from the liquid inlet, enters the first cooling space through the first intermediate liquid inlet, then enters the second cooling space through the cooling channel, then enters the first cooling space through the cooling channel, then enters the liquid outlet cavity through the second intermediate liquid inlet, and finally flows out from the liquid outlet. The coolant can directly contact and exchange heat with the stator core during the flow of the first cooling space, the cooling channel, and the second cooling space, thereby improving the cooling efficiency of the motor and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a stator assembly provided by an embodiment of the present invention;

[0022] Figure 2 A schematic cross-sectional view of a stator assembly provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of a three-dimensional cross-sectional structure of a stator assembly provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a three-dimensional structure of a stator core provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of another stator core provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of an exploded structure of a stator assembly provided by an embodiment of the present invention;

[0027] 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 baffle, 600 is a stator pressure plate, 101 is a liquid inlet cavity, 102 is a liquid outlet cavity, 103 is a first intermediate liquid port, 104 is a second intermediate liquid port, 105 is a liquid inlet, 106 is a liquid outlet, 201 is a cooling channel, 301 is a first cooling area, and 302 is a second cooling area;

[0028] 100-1 is the front housing, 200-1 is the front stator core, 500-1 is the front spoiler, and 600-1 is the front stator pressure plate; 100-2 is the rear housing, 200-2 is the rear stator core, 500-2 is the rear spoiler, and 600-2 is the rear stator pressure plate. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] See also Figures 1 to 6 A stator assembly in an 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 portion of the stator core 200 encloses a second cooling space 400;

[0032] The housing 100 is provided with a liquid inlet cavity 101 and a liquid outlet cavity 102;

[0033] The outer wall of the housing 100 is provided with a liquid inlet 105 communicating with the liquid inlet cavity 101 and a liquid outlet 106 communicating with the liquid outlet cavity 102; among the multiple housings 100, the liquid outlet 106 of the previous housing 100 is communicated with the liquid inlet 105 of the next housing 100;

[0034] The inner wall of the housing 100 is provided with a first intermediate liquid port 103 communicating with the liquid inlet cavity 101 and a second intermediate liquid port 104 communicating with the liquid outlet cavity 102; and

[0035] A plurality of cooling channels 201 are disposed on the stator core 200 , and the cooling channels 201 are connected to the first cooling space 300 and the second cooling space 400 .

[0036] When the stator assembly of the present invention is used, the coolant enters the liquid inlet cavity 101 from the liquid inlet 105, enters the first cooling space 300 through the first intermediate liquid port 103, then enters the second cooling space 400 through the cooling channel 201, then enters the first cooling space 300 through the cooling channel 201, then enters the liquid outlet cavity 102 through the second intermediate liquid port 104, and finally flows out from the liquid outlet 106. The coolant can directly contact and exchange heat with the stator core 200 in the process of flowing in the first cooling space 300, the cooling channel 201, and the second cooling space 400, thereby improving the cooling efficiency of the motor and extending the service life of the motor.

[0037] 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 600 through the stator pressing plate 600 .

[0038] In order to increase the cooling effect, in another embodiment of the present invention, a baffle 500 is further provided between the housing 100 and the stator core 200 to separate the first cooling space 300. The baffle 500 is provided so that the coolant entering the first cooling space 300 flows along a predetermined trajectory to extend the contact time between the coolant and the stator core 200. At the same time, the baffle 500 is provided so that the coolant can flow through most of the cooling channels 201 on the stator core 200, so that the temperature on the stator core 200 is more uniform.

[0039] Among them, in the embodiment of the present invention, the number of the baffles 500 is two, and the two baffles 500 are symmetrically arranged. The two baffles 500 divide the first cooling space 300 into two areas, namely the first cooling area 301 and the second cooling area 302, wherein the first cooling area 301 corresponds to the liquid inlet cavity 101, and the second cooling area 302 corresponds to the liquid outlet cavity 102. During the cooling process, the coolant in the liquid inlet cavity 101 enters the first cooling area 301 through the first intermediate liquid port 103, the coolant in the first cooling area 301 passes through the cooling channel 201 corresponding to the first cooling area 301 and enters the second cooling space 400, the coolant in the second cold zone space passes through the cooling channel 201 corresponding to the second cooling area 302 and enters the second cooling area 302, and the coolant in the second cooling area 302 passes through the second intermediate liquid port 104 and enters the liquid outlet cavity 102.

[0040] It should be noted that, in the embodiment of the present invention, the stator assembly includes one or more housings 100. When there are multiple housings 100, each housing 100 is correspondingly installed with a stator core 200. All the multiple housings 100 can be two housings 100, three housings 100, four housings 100, etc. The number of housings 100 can be determined according to the output power.

[0041] The multiple shells 100 are coaxially arranged, that is, the end faces of adjacent shells 100 are in contact with each other.

[0042] In two adjacent housings 100, the liquid outlet 106 of one housing 100 is connected to the liquid inlet 105 of the other housing 100. The connection can be made through an external pipeline, or the liquid inlet 105 of one housing 100 is coaxially arranged with the liquid outlet 106 of the other housing 100. That is, the liquid outlet 106 and the liquid inlet 105 are both arranged on the end surface, and when the two housings 100 are butt-jointed, the liquid outlet 106 and the liquid inlet 105 are automatically connected.

[0043] Taking two shells 100 as an example, the liquid outlet 106 of one shell 100 is set on the end surface, and the liquid inlet 105 of the other shell 100 is set on the end surface. When the two shells 100 are docked, the liquid outlet 106 of the front shell 100 is connected to the liquid inlet 105 of the rear shell 100.

[0044] In the multiple shells 100, the liquid inlet 105 of the shell 100 at one end and the liquid outlet 106 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 105 of the shell 100 at one end and the liquid outlet 106 of the shell 100 at the other end are both arranged on the peripheral surface of the shell 100, and further, the liquid inlet 105 of the shell 100 at one end and the liquid outlet 106 of the shell 100 at the other end are both arranged on the same side.

[0045] In the embodiment of the present invention, 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. Among them, 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 face of the stator core 200 and is surrounded by the shell 100. It can be understood that: a groove is arranged on the end face of the stator core 200, and the corresponding shell 100 is a planar structure; the cooling channel 201 is surrounded by the groove and the surface of the shell 100; or a groove is arranged on the stator core 200, and a groove is arranged on the surface of the corresponding shell 100, and the two grooves are connected to form the cooling channel 201.

[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 600 - 1 through the front stator pressure plate 600 - 1 .

[0048] A front spoiler 500 - 1 is disposed between the front housing 100 - 1 and the front stator core 200 - 1 .

[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 600 - 2 through the rear stator pressure plate 600 - 2 .

[0050] A rear spoiler 500 - 2 is disposed between the rear housing 100 - 2 and the rear stator core 200 - 2 .

[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 shell and a stator core arranged inside the shell; wherein the stator core and the shell form a first cooling space, and the middle part of the stator core forms a second cooling space; A liquid inlet cavity and a liquid outlet cavity are provided in the shell, the liquid inlet cavity is located on one side of the first cooling space, the liquid outlet cavity is located on the other side of the first cooling space, and the liquid inlet cavity and the liquid outlet cavity are arranged around the first cooling space; The outer wall of the shell is provided with a liquid inlet communicated with the liquid inlet cavity and a liquid outlet communicated with the liquid outlet cavity; The inner wall of the shell is provided with a first intermediate liquid port communicating with the liquid inlet cavity and a second intermediate liquid port communicating with the liquid outlet cavity; and 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; The cooling channel is a through hole penetrating the stator core, or the cooling channel is a groove arranged on the end surface of the stator core.

2. The stator assembly according to claim 1, characterized in that A baffle is also provided between the housing and the stator core to separate the first cooling space.

3. The stator assembly according to claim 2, characterized in that There are two baffles, which are symmetrically arranged. The baffles divide the first cooling space into a first cooling area and a second cooling area, wherein the first cooling area is connected to the liquid inlet cavity through a first intermediate liquid port, and the second cooling area is connected to the liquid outlet cavity through a second intermediate liquid port.

4. The stator assembly according to claim 1, characterized in that The stator core is enclosed in a space surrounded by the housing and the stator pressure plate through a stator pressure plate.

5. The stator assembly according to any one of claims 1 to 4, characterized in that: There are multiple shells, and among the multiple shells, the liquid outlet of the front shell is connected with the liquid inlet of the rear shell.

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

7. The stator assembly according to claim 6, 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.

8. An axial magnetic field motor, characterized in that: Comprising a stator assembly as claimed in any one of claims 1 to 7.

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