CN110417190A - Cooling system for an electric motor - Google Patents
Cooling system for an electric motor Download PDFInfo
- Publication number
- CN110417190A CN110417190A CN201810404089.6A CN201810404089A CN110417190A CN 110417190 A CN110417190 A CN 110417190A CN 201810404089 A CN201810404089 A CN 201810404089A CN 110417190 A CN110417190 A CN 110417190A
- Authority
- CN
- China
- Prior art keywords
- intermediate member
- housing
- cooling
- cooling jacket
- cooling system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a cooling system for an electric motor, comprising: a cooling jacket for mounting on an outer periphery of a stator of the motor; a housing for accommodating the stator with the cooling jacket mounted thereon, and forming a cavity for filling fluid between the housing and the cooling jacket, the housing being provided with an inlet for fluid to flow into the cavity and an outlet for fluid to flow out of the cavity; an intermediate member disposed in the cavity between the cooling jacket and the housing and separating the inlet and the outlet; wherein the intermediate member is disposed in the cavity in an interference fit with the housing and the cooling jacket such that the first surface and the second surface of the intermediate member are in constant contact with the housing and the cooling jacket, respectively, and at least the second surface of the first surface and the second surface is provided with an opening extending from one end to the other end of the intermediate member in a circumferential direction of the motor. The cooling system for the motor according to the present invention has a better cooling effect.
Description
Technical Field
The present invention relates to the field of electric motors, and in particular to a cooling system for an electric motor.
Background
In an electric motor, in order to cool down a stator, a cooling system for the electric motor is generally provided. Fig. 1 shows a schematic view of a cooling system for an electric motor. Fig. 2 is an enlarged view of a portion a in fig. 1. A cooling system for an electric motor is described below with reference to fig. 1 and 2. As shown in fig. 1, the cooling system for the motor includes a housing 10 and a cooling jacket 20 mounted on an outer circumference of the stator, wherein the housing 10 serves to accommodate the stator mounted with the cooling jacket 20, and a cavity 30 (see fig. 2) for filling a fluid (i.e., a cooling fluid) is formed between the housing 10 and the cooling jacket 20. Furthermore, the housing 10 is provided with an inlet 11 for fluid to flow into the cavity 30 and an outlet 12 for fluid to flow out of the cavity 30. In order to prevent the fluid from flowing out of the outlet 12 through a short path in the cavity 30 when the fluid flows into the cavity 30 from the inlet 11, as shown in fig. 2, the cooling system for an electric motor further includes an intermediate member 40 provided in the cavity 30 between the cooling jacket 20 and the housing 10 for separating the inlet 11 and the outlet 12, thereby allowing almost all of the fluid to flow into the cavity 30 from the inlet 11 and to flow out of the outlet 12 through a long path in the cavity 30 (i.e., substantially through the entire outer circumference of the cooling jacket 20) to cool the stator.
However, since in the prior art cooling systems for electric motors the intermediate component is connected to the cooling jacket, in the region of the cooling jacket connected to the intermediate component, where no cooling fluid passes, the temperature will be very high, which will result in dangerous hot spots in the cooling jacket as well as in the stator.
Therefore, a cooling system for an electric motor having a better cooling effect is desired.
Disclosure of Invention
The invention aims to provide a cooling system for a motor with better cooling effect.
The present invention provides a cooling system for an electric motor, comprising:
a cooling jacket for mounting on an outer periphery of a stator of the motor;
a housing for accommodating the stator mounted with the cooling jacket and forming a cavity for filling fluid between the housing and the cooling jacket, the housing being provided with an inlet for fluid to flow into the cavity and an outlet for fluid to flow out of the cavity;
an intermediate member disposed in the cavity between the cooling jacket and the housing and separating the inlet and the outlet;
wherein,
the intermediate member is disposed in the cavity in an interference fit with the housing and the cooling jacket such that first and second surfaces of the intermediate member are in constant contact with the housing and the cooling jacket, respectively, and at least the second surface of the first and second surfaces is provided with an opening extending from one end to the other end of the intermediate member in a circumferential direction of the motor.
According to an embodiment of the invention, the intermediate member is a sheet-like member.
According to an embodiment of the invention, the intermediate member is provided with a plurality of openings, and the height of the openings is half the height of the intermediate member.
According to an embodiment of the invention, the opening is a rectangular opening.
According to an embodiment of the invention, the intermediate member is made of a material having a relatively high ductility.
According to an embodiment of the invention, the intermediate member is connected to the cooling jacket and/or the housing.
According to an embodiment of the invention, a groove is provided on the housing, a protrusion is provided on the intermediate member, and the protrusion snaps into the groove.
According to an embodiment of the invention, the more malleable material comprises rubber and plastic.
In the cooling system for an electric motor according to the present invention, since the cooling fluid flows through the region of the cooling jacket in contact with the intermediate member and cools the region, no dangerous hot spots occur in the cooling jacket and the stator. Therefore, the cooling system for the motor according to the present invention has a better cooling effect.
Drawings
Fig. 1 shows a schematic view of a cooling system for an electric motor.
Fig. 2 is an enlarged view of a portion a in fig. 1.
FIG. 3 illustrates a perspective view of an intermediate member according to an embodiment of the invention.
FIG. 4 shows a schematic plan view of an intermediate member according to an embodiment of the invention.
Detailed Description
Hereinafter, a specific embodiment of a cooling system for an electric motor according to the present invention will be described with reference to the accompanying drawings. The following detailed description and drawings are included to illustrate the principles of the invention, which is not to be limited to the preferred embodiments described, but is to be defined by the appended claims.
In addition, spatially relative terms (such as "upper," "lower," "left," and "right," etc.) are used to describe one element's relative positional relationship with another element as illustrated in the figures. Spatially relative terms may therefore apply in other orientations than those illustrated in the figures, when used. It will be apparent that although for ease of illustration all of these spatially relative terms refer to the orientation shown in the drawings, those skilled in the art will appreciate that orientations other than those shown in the drawings may be used.
FIG. 3 illustrates a perspective view of an intermediate member according to an embodiment of the invention. FIG. 4 shows a schematic plan view of an intermediate member according to an embodiment of the invention. An intermediate member in a cooling system for an electric motor according to the present invention will be described below with reference to fig. 3 and 4.
Referring to fig. 3, an intermediate member 400 in a cooling system for an electric motor according to the present invention is similar to the arrangement of the intermediate member 40 in the cooling system described in fig. 1 and 2, i.e., is also provided in the cavity 30 between the cooling jacket 20 and the housing 10 and serves to separate the inlet 11 and the outlet 12.
With continued reference to fig. 3, the structure of the intermediate member 400 in the cooling system for the motor according to the embodiment of the present invention is described in detail below. The intermediate member 400 is a sheet-like member, and includes a first surface 401, a second surface 402, and an opening 403 provided on the second surface 402, wherein a first surface 401 of the intermediate member 400 is intended to be in contact with the housing 10, a second surface 402 is intended to be in contact with the cooling jacket 20, an opening 403 extends from a first side 404 to a second side 405 of the intermediate member 400, when the intermediate member 400 is disposed in the cavity 30 between the housing 10 and the cooling jacket 20, taking the viewing direction shown in fig. 2 as an example, the inlet 11 of the housing 10 is located on the left side of the first side 404 (left side) of the intermediate member 400, and, the outlet 12 of the housing 10 is positioned at the right side of the second side 405 (right side) of the middle member 400, thereby allowing the opening 403 of the intermediate member 400 to extend from one end to the other end of the intermediate member 400 in the circumferential direction of the motor, i.e. from one end at which the first side 404 is located to the other end at which the second side 405 is located. It will be understood by those skilled in the art that in the cooling system for an electric motor according to the present invention, the position where the opening on the intermediate member is provided is not limited to the above-described embodiment, for example, the opening may be provided on both the first surface and the second surface of the intermediate member, in which case the cooling fluid may also be used to cool the region in the casing 10 that is in contact with the intermediate member 400.
Also, in the cooling system for the motor according to the present invention, the intermediate member 400 is disposed in the cavity 30 in an interference fit with the housing 10 and the cooling jacket 20 such that the first surface 401 and the second surface 402 are always in contact with the housing 10 and the cooling jacket 20, respectively. It can be understood by those skilled in the art that in the cooling system for a motor according to the present invention, even when influence factors such as mechanical manufacturing tolerance, mounting tolerance, thermal expansion, etc. are considered, the intermediate member 400 can ensure that the first and second surfaces 401 and 402 are always in contact with the housing 10 and the cooling jacket 20, respectively, by interference fit with the housing 10 and the cooling jacket 20.
The operation principle of the cooling system for an electric motor according to the present invention is described below.
Taking the viewing direction shown in fig. 2 as an example, when the cooling fluid flows into the cavity 30 between the housing 10 and the cooling jacket 20 from the inlet 11 of the housing 10, most of the cooling fluid will flow through the cavity 30 in the counterclockwise direction blocked by the intermediate member 400 due to the provision of the intermediate member 400, that is, the cooling fluid flows through almost the entire outer circumference of the cooling jacket 20, thereby cooling the stator of the motor. Furthermore, since the second surface 402 of the intermediate member 400 is provided with the openings 403, a portion of the cooling fluid will flow through the cavity 30 in the clockwise direction through the openings 403, and therefore, the cooling fluid flows through the region of the cooling jacket 20 in contact with the intermediate member 400 and cools the region. Thus, no dangerous hot spots occur in the cooling jacket and in the stator. Therefore, the cooling system for the motor according to the present invention has a better cooling effect.
The structure of the intermediate member 400 is described next. According to an embodiment of the present invention, as shown in fig. 4, the middle member 400 may be provided with a plurality of openings 403, and the height h of the openings 4031May be the height h of the intermediate member 4002And the opening 403 is a rectangular opening. It can be understood by those skilled in the art that the cooling system for the motor according to the present invention is not limited thereto. For example, the number and height of the openings may be determined by a person skilled in the art on the basis of the actual situation (e.g. the volume of cooling fluid desired to pass through the openings), and the openings may be designed in other shapes, e.g. circular.
According to embodiments of the present invention, the intermediate member may be made of a relatively ductile material including rubber and plastic. It can be understood by those skilled in the art that in the cooling system for an electric motor according to the present invention, the material of which the intermediate member is made is not limited to rubber and plastic, and may be, for example, metal having a relatively large ductility.
According to an embodiment of the invention, the intermediate member may be connected to the cooling jacket and/or the housing. It can be understood by those skilled in the art that in the cooling system for an electric motor according to the present invention, the intermediate member is not limited to the above-described connection, and for example, the intermediate member may be not connected to both the cooling jacket and the housing but simply placed in the cavities of the cooling jacket and the housing.
According to an embodiment of the present invention, a groove may be provided on the housing, a protrusion may be provided on the intermediate member, and the protrusion is caught in the groove. It will be understood by those skilled in the art that in the cooling system for an electric motor according to the present invention, the housing and the intermediate member are not limited to having the above-described structure, and for example, those skilled in the art may not provide the above-described groove on the housing and/or the above-described protrusion on the intermediate member as the case may be.
As described above, although the exemplary embodiments of the present invention have been described in the description with reference to the drawings, the present invention is not limited to the above-described embodiments, and the scope of the present invention should be defined by the claims and their equivalents.
Claims (8)
1. A cooling system for an electric motor comprising:
a cooling jacket (20) for mounting on the outer periphery of the stator of the electric motor;
a housing (10) for accommodating the stator with the cooling jacket (20) mounted thereon, and forming a cavity (30) for filling with a fluid between the housing (10) and the cooling jacket (20), the housing (10) being provided with an inlet (11) for inflow of the fluid into the cavity (30) and an outlet (12) for outflow of the fluid from the cavity (30);
an intermediate member (400) disposed in the cavity (30) between the cooling jacket (20) and the housing (10) and separating the inlet (11) and the outlet (12);
it is characterized in that the preparation method is characterized in that,
the intermediate member (400) is disposed in the cavity (30) in an interference fit with the housing (10) and the cooling jacket (20) such that a first surface (401) and a second surface (402) of the intermediate member (400) are in constant contact with the housing (10) and the cooling jacket (20), respectively, and at least the second surface (402) of the first surface (401) and the second surface (402) is provided with an opening (403), the opening (403) extending from one end to the other end of the intermediate member (400) in the circumferential direction of the motor.
2. The cooling system according to claim 1, wherein the intermediate member (400) is a sheet-like member.
3. The cooling system according to claim 2, wherein the intermediate member (400) is provided with a plurality of openings (403), and the intermediate member is provided with a plurality of openings (403)The height (h) of the opening (403)1) Is the height (h) of the intermediate member (400)2) Half of that.
4. The cooling system according to claim 3, wherein the opening (403) is a rectangular opening.
5. The cooling system of claim 4, wherein the intermediate member (400) is made of a material having a relatively high ductility.
6. Cooling system according to claim 5, wherein the intermediate member (400) is connected to the cooling jacket (20) and/or the housing (10).
7. The cooling system according to claim 6, wherein a groove is provided on the housing (10), a protrusion is provided on the intermediate member (400), and the protrusion snaps into the groove.
8. The cooling system of claim 7, wherein the relatively malleable material comprises rubber and plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810404089.6A CN110417190A (en) | 2018-04-28 | 2018-04-28 | Cooling system for an electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810404089.6A CN110417190A (en) | 2018-04-28 | 2018-04-28 | Cooling system for an electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110417190A true CN110417190A (en) | 2019-11-05 |
Family
ID=68357402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810404089.6A Pending CN110417190A (en) | 2018-04-28 | 2018-04-28 | Cooling system for an electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110417190A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021122601A1 (en) * | 2019-12-19 | 2021-06-24 | Valeo Equipements Electriques Moteur | Cooled rotary electric machine |
| EP3996255A1 (en) * | 2020-11-04 | 2022-05-11 | Etel S.A. | Stator cooling housing for a stator of a rotary electric motor |
| WO2024153289A1 (en) * | 2023-01-17 | 2024-07-25 | Schaeffler Technologies AG & Co. KG | Electric machine having an elastically spring-mounted separating element for a cooling channel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10288188A (en) * | 1997-04-16 | 1998-10-27 | Shimadzu Corp | High speed rotating machine |
| WO2008132177A2 (en) * | 2007-04-30 | 2008-11-06 | Siemens Aktiengesellschaft | Electric motor comprising a connection device built into the cooling sleeve |
| CN101304200A (en) * | 2007-03-16 | 2008-11-12 | 雷米科技有限公司 | Liquid cooling system of an elecric machine |
| CN103001398A (en) * | 2012-11-09 | 2013-03-27 | 烟台鼎立新能源汽车动力系统有限公司 | Cooling sleeve of liquid cooling electric motor |
| WO2014054830A1 (en) * | 2012-10-04 | 2014-04-10 | 한국에너지기술연구원 | Cooling system and cooling method for generator |
| CN105379069A (en) * | 2013-07-09 | 2016-03-02 | 舍弗勒技术股份两合公司 | Cooling system for an electric motor |
| CN107017729A (en) * | 2017-06-09 | 2017-08-04 | 山东凌众动力科技有限公司 | Motor |
-
2018
- 2018-04-28 CN CN201810404089.6A patent/CN110417190A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10288188A (en) * | 1997-04-16 | 1998-10-27 | Shimadzu Corp | High speed rotating machine |
| CN101304200A (en) * | 2007-03-16 | 2008-11-12 | 雷米科技有限公司 | Liquid cooling system of an elecric machine |
| WO2008132177A2 (en) * | 2007-04-30 | 2008-11-06 | Siemens Aktiengesellschaft | Electric motor comprising a connection device built into the cooling sleeve |
| WO2014054830A1 (en) * | 2012-10-04 | 2014-04-10 | 한국에너지기술연구원 | Cooling system and cooling method for generator |
| CN103001398A (en) * | 2012-11-09 | 2013-03-27 | 烟台鼎立新能源汽车动力系统有限公司 | Cooling sleeve of liquid cooling electric motor |
| CN105379069A (en) * | 2013-07-09 | 2016-03-02 | 舍弗勒技术股份两合公司 | Cooling system for an electric motor |
| CN107017729A (en) * | 2017-06-09 | 2017-08-04 | 山东凌众动力科技有限公司 | Motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021122601A1 (en) * | 2019-12-19 | 2021-06-24 | Valeo Equipements Electriques Moteur | Cooled rotary electric machine |
| FR3105649A1 (en) * | 2019-12-19 | 2021-06-25 | Valeo Equipements Electriques Moteur | Cooled rotating electric machine |
| EP3996255A1 (en) * | 2020-11-04 | 2022-05-11 | Etel S.A. | Stator cooling housing for a stator of a rotary electric motor |
| WO2024153289A1 (en) * | 2023-01-17 | 2024-07-25 | Schaeffler Technologies AG & Co. KG | Electric machine having an elastically spring-mounted separating element for a cooling channel |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191105 |