CN111725939A - Cooling system, stator module and axial magnetic field motor - Google Patents
Cooling system, stator module and axial magnetic field motor Download PDFInfo
- Publication number
- CN111725939A CN111725939A CN201910208629.8A CN201910208629A CN111725939A CN 111725939 A CN111725939 A CN 111725939A CN 201910208629 A CN201910208629 A CN 201910208629A CN 111725939 A CN111725939 A CN 111725939A
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- China
- Prior art keywords
- oil
- cooling
- stator core
- housing
- cooling system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Abstract
The invention discloses a cooling system, a stator assembly and an axial magnetic field motor. Because the cooling oil can directly contact with the stator core for heat exchange, the cooling efficiency of the motor is improved, and the service life of the motor is prolonged.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a cooling system, a stator assembly and an axial magnetic field motor.
Background
The existing automobile driving motor has complex operation condition, and various losses can be generated in the operation process of the motor due to the structural characteristics of the motor, so that the motor is heated. In order to improve the working efficiency of the motor, a cooling system is required to be designed for the motor, and the cooling system mainly comprises two types, namely air cooling; the other is liquid cooling. Compared with air cooling, the efficiency of liquid cooling is higher. The existing liquid cooling system mainly adopts an external cooling mode, namely, cooling oil is in indirect contact with a cooled core component, so that the cooling efficiency is low, and the service life of the motor is influenced.
Disclosure of Invention
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 prolong the service life of the motor.
In order to achieve the purpose, the invention provides the following technical scheme:
a cooling system comprises a shell, wherein the bottom of the shell is provided with a mounting position for mounting a stator core; the cooling system further includes:
the oil inlet cavity and the oil return cavity are arranged in the shell;
the oil inlet is communicated with the oil inlet cavity, and the oil outlet is communicated with the oil return cavity;
the oil injection hole and the oil return hole are arranged on the inner wall of the shell, the oil injection hole is communicated with the oil inlet cavity, and the oil return hole is communicated with the oil return cavity; and
a plurality of settings are in the oil groove of leading of the bottom of casing, lead the oil groove and run through the installation position.
In one embodiment of the present invention, the number of the housings is plural, and in the plural housings, the oil outlet of the previous housing is communicated with the oil inlet of the subsequent housing.
In one embodiment of the invention, in two adjacent housings, the oil inlet of the previous housing is arranged coaxially with the oil outlet of the next housing.
In one embodiment of the invention, the stator assembly comprises a stator core and the cooling system as described in any one of the above embodiments, wherein the stator core is arranged on a mounting position of a shell of the cooling system; the outer circular ring of the stator core and the shell enclose a first cooling space, and the inner circular ring of the stator core and the shell enclose a second cooling space.
In one embodiment of the present invention, a spoiler is further disposed between the housing and the stator core to partition the first cooling space.
In one embodiment of the present invention, the number of the spoilers is two, the two spoilers are symmetrically arranged, and the spoiler divides the first cooling space into a first cooling area and a second cooling area, wherein the first cooling area is communicated with the oil inlet cavity through an oil injection hole, and the second cooling area is communicated with the oil return cavity through an oil return hole.
In one embodiment of the invention, the stator core is enclosed in a space enclosed by the shell and the sealing cover plate through the sealing cover plate.
In one embodiment of the present invention, the number of the oil guiding grooves is the same as the number of teeth of the stator core.
In one embodiment of the present invention, the oil guide groove corresponds to a coil gap of the stator core.
In one embodiment of the invention, the axial magnetic field motor comprises the stator assembly as described in any one of the above embodiments.
According to the technical scheme, when the stator assembly is adopted, cooling oil enters the oil inlet cavity from the oil inlet and enters the shell through the oil injection hole, the cooling oil entering the shell can be in direct contact with the stator core arranged in the shell, and after contact heat exchange, the cooling oil enters the oil return cavity through the oil return hole and finally flows out of the oil outlet. Because the cooling oil can directly contact with the stator core for heat exchange, the cooling efficiency of the motor is improved, and the service life of the motor is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural diagram of a cooling system according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of another cooling system according to an embodiment of the present invention;
fig. 3 is an exploded view of a stator assembly according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a stator assembly according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of a stator assembly according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of a sealing cover plate according to an embodiment of the present invention;
in the drawing, 100 is a cooling system, 200 is a stator core, 300 is a sealing cover plate, 400 is a first cooling space, 500 is a second cooling space, 101 is a housing, 102 is an installation position, 103 is an oil inlet cavity, 104 is an oil return cavity, 105 is an oil inlet, 106 is an oil outlet, 107 is an oil spray hole, 108 is an oil return hole, 109 is an oil guide groove, 201 is a spoiler, and 301 is a clamping groove.
Detailed Description
The core of the invention is to provide a stator component and an axial magnetic field motor so as to improve the cooling efficiency of the motor and prolong the service life of the motor.
The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1 to 6, the cooling system in the embodiment of the invention includes a housing 101, a mounting position 102 for mounting a stator core 200 is disposed at a bottom of the housing 101; the cooling system 100 further includes:
an oil inlet cavity 103 and an oil return cavity 104 provided in the housing 101;
an oil inlet 105 and an oil outlet 106 which are arranged on the outer wall of the shell 101, wherein the oil inlet 105 is communicated with the oil inlet cavity 103, and the oil outlet 106 is communicated with the oil return cavity 104;
an oil injection hole 107 and an oil return hole 108 are arranged on the inner wall of the shell 101, the oil injection hole 107 is communicated with the oil inlet cavity 103, and the oil return hole 108 is communicated with the oil return cavity 104; and
a plurality of oil guide grooves 109 are formed in the bottom of the housing 101, and the oil guide grooves 109 penetrate the mounting portion 102.
When the stator assembly is adopted, cooling oil enters the oil inlet cavity 103 from the oil inlet 105 and enters the interior of the shell 101 through the oil injection hole 107, the cooling oil entering the interior of the shell 101 can be directly contacted with the stator core 200 arranged in the shell 101, and after contact heat exchange, the cooling oil enters the oil return cavity 104 through the oil return hole 108 and finally flows out of the oil outlet 106. Because the cooling oil can directly contact with the stator core 200 for heat exchange, the cooling efficiency of the motor is improved, and the service life of the motor is prolonged.
The cooling system 100 includes one or more housings 101. when there are multiple housings 101, the multiple housings 101 can be two housings 101, three housings 101, four housings 101, and so on. The number of the housings 101 may be determined according to the magnitude of the output power.
The plurality of housings 101 are coaxially arranged, that is: the end faces of the adjacent cases 101 are in contact with each other.
In two adjacent housings 101, the oil outlet 106 of the previous housing 101 communicates with the oil inlet 105 of the subsequent housing 101. The communication can be realized in various ways, specifically, the connection can be realized through an external pipeline, or the oil inlet 105 of the previous housing 101 and the oil outlet 106 of the subsequent housing 101 are arranged coaxially. That is, the oil outlet 106 and the oil inlet 105 are both disposed on the end surface, and when the two housings 101 are butted, the oil outlet 106 and the oil inlet 105 are automatically conducted.
Taking two shells 101 as an example, the oil outlet 106 of one shell 101 is arranged on the end surface, the oil inlet 105 of the other shell 101 is arranged on the end surface, and when the two shells 101 are butted, the oil outlet 106 of the previous shell 101 is communicated with the oil inlet 105 of the next shell 101.
In the plurality of housings 101, the oil inlet 105 of the housing 101 at one end and the oil outlet 106 of the housing 101 at the other end may be located on an end surface of the corresponding housing 101, or may be located on a circumferential surface of the corresponding housing 101. Preferably, in order to facilitate installation of subsequent parts, in the embodiment of the present invention, the oil inlet 105 of the housing 101 at one end and the oil outlet 106 of the housing 101 at the other end are both disposed on the circumferential surface of the housing 101, and further, the oil inlet 105 of the housing 101 at one end and the oil outlet 106 of the housing 101 at the other end are both disposed on the same side.
The invention also discloses a stator assembly, which comprises a stator core 200 and the cooling system 100 of any one of the above parts, wherein the stator core 200 is arranged on the mounting position 102 of the housing 101 of the cooling system 100, the outer ring of the stator core 200 and the housing 101 enclose a first cooling space 400, and the inner ring of the stator core 200 and the housing 101 enclose a second cooling space 500.
In order to increase the cooling effect, in another embodiment of the present invention, a spoiler 201 partitioning the first cooling space 400 is further provided between the housing 101 and the stator core 200. The cooling oil introduced into the first cooling space 400 flows according to a predetermined trajectory by providing the spoiler 201 to extend a contact time of the cooling oil with the stator core 200. While the spoiler 201 is provided to allow the cooling oil to flow through most of the guide grooves 109 to make the temperature more uniform on the stator core 200.
In the embodiment of the present invention, the number of the spoilers 201 is two, and the two spoilers 201 are symmetrically arranged. The two spoilers 201 divide the first cooling space 400 into two areas, namely a first cooling area corresponding to the oil inlet cavity 103 and a second cooling area corresponding to the oil return cavity 104. In the cooling process of the cooling oil, the cooling oil in the oil inlet cavity 103 enters the first cooling area through the oil injection hole 103, the cooling oil in the first cooling area enters the second cooling space 500 through the oil guide groove 109 corresponding to the first cooling area, the cooling oil in the second cooling area enters the second cooling area through the oil guide groove 109 corresponding to the second cooling area, and the cooling oil in the second cooling area enters the oil return cavity 104 through the oil return hole 108.
In the embodiment of the present invention, the number of oil guiding grooves 109 is multiple, wherein the number of oil guiding grooves 109 is the same as or different from the number of teeth of stator core 200, and in the embodiment of the present invention, the number of oil guiding grooves 109 is the same as the number of teeth of stator core 200.
Further, the oil guide groove 109 corresponds to a coil gap of the stator core 200. Since the coil is a main heat generating part in stator core 200, when oil guide groove 109 corresponds to the coil gap of stator core 200, the cooling oil entering oil guide groove 109 can sufficiently contact with the tooth slot of stator core 200, thereby further improving the cooling effect.
In order to prevent the liquid leakage, in the embodiment of the present invention, the stator core 200 is enclosed in the space enclosed by the housing 101 and the sealing cover 300 by the sealing cover 300. The sealing cover plate 300 is fixed to the housing 101 by screws, or may be welded, riveted, or dovetailed. One end of the sealing cover plate 300 close to the stator core 200 is further provided with a clamping groove 301 for clamping the stator core.
The invention also discloses an axial magnetic field motor which comprises the stator assembly. Because above-mentioned stator module has above beneficial effect, including above-mentioned stator module's axial magnetic field motor also has corresponding effect, and this place is no longer repeated.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The cooling system is characterized by comprising a shell, wherein the bottom of the shell is provided with a mounting position for mounting a stator core; the cooling system further includes:
the oil inlet cavity and the oil return cavity are arranged in the shell;
the oil inlet is communicated with the oil inlet cavity, and the oil outlet is communicated with the oil return cavity;
the oil injection hole and the oil return hole are arranged on the inner wall of the shell, the oil injection hole is communicated with the oil inlet cavity, and the oil return hole is communicated with the oil return cavity; and
a plurality of settings are in the oil groove of leading of the bottom of casing, lead the oil groove and run through the installation position.
2. The cooling system according to claim 1, wherein said housing is plural in number, and among said plurality of housings, said oil outlet of a preceding housing is communicated with said oil inlet of a succeeding housing.
3. The cooling system according to claim 2, wherein in adjacent two of said housings, the oil inlet of a preceding housing is arranged coaxially with the oil outlet of a succeeding housing.
4. A stator assembly, characterized by comprising a stator core and a cooling system according to any one of claims 1 to 3, the stator core being provided on a mounting site of a housing of the cooling system; the outer circular ring of the stator core and the shell enclose a first cooling space, and the inner circular ring of the stator core and the shell enclose a second cooling space.
5. The stator assembly of claim 4 wherein a spoiler is further disposed between the housing and the stator core separating the first cooling space.
6. The stator assembly of claim 5, wherein the number of the spoilers is two, two of the spoilers are symmetrically arranged, and the spoilers divide the first cooling space into a first cooling zone and a second cooling zone, wherein the first cooling zone is in communication with the oil intake cavity through an oil injection hole, and the second cooling zone is in communication with the oil return cavity through an oil return hole.
7. The stator assembly of claim 6, wherein the stator core is enclosed within a space enclosed by the housing and a sealing cover plate.
8. The stator assembly according to any of claims 4 to 7, wherein the number of oil guiding slots is the same as the number of teeth of the stator core.
9. The stator assembly of claim 8, wherein the oil-guiding slots correspond to tooth slots of the stator core.
10. An axial field machine comprising a stator assembly according to any of claims 4 to 7.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910208629.8A CN111725939A (en) | 2019-03-19 | 2019-03-19 | Cooling system, stator module and axial magnetic field motor |
| EP19910377.1A EP3913777A4 (en) | 2019-01-14 | 2019-12-27 | Cooling system, stator assembly, and axial magnetic field motor |
| US17/422,424 US11942828B2 (en) | 2019-01-14 | 2019-12-27 | Cooling system, stator assembly, and axial magnetic field motor |
| PCT/CN2019/129106 WO2020147551A1 (en) | 2019-01-14 | 2019-12-27 | Cooling system, stator assembly, and axial magnetic field motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910208629.8A CN111725939A (en) | 2019-03-19 | 2019-03-19 | Cooling system, stator module and axial magnetic field motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111725939A true CN111725939A (en) | 2020-09-29 |
Family
ID=72562352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910208629.8A Pending CN111725939A (en) | 2019-01-14 | 2019-03-19 | Cooling system, stator module and axial magnetic field motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111725939A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383171A (en) * | 2020-10-13 | 2021-02-19 | 速珂智能科技（上海）有限公司 | Oil-cooling heat dissipation type electric vehicle motor |
| CN113794301A (en) * | 2021-08-09 | 2021-12-14 | 华为技术有限公司 | Axial flux motor and vehicle |
| WO2022088527A1 (en) * | 2020-10-30 | 2022-05-05 | 上海盘毂动力科技股份有限公司 | Cooling structure for disc-type motor |
-
2019
- 2019-03-19 CN CN201910208629.8A patent/CN111725939A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383171A (en) * | 2020-10-13 | 2021-02-19 | 速珂智能科技（上海）有限公司 | Oil-cooling heat dissipation type electric vehicle motor |
| WO2022088527A1 (en) * | 2020-10-30 | 2022-05-05 | 上海盘毂动力科技股份有限公司 | Cooling structure for disc-type motor |
| CN113794301A (en) * | 2021-08-09 | 2021-12-14 | 华为技术有限公司 | Axial flux motor and vehicle |
| CN113794301B (en) * | 2021-08-09 | 2023-03-10 | 华为数字能源技术有限公司 | Axial flux motor and vehicle |
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