CN113394907A - Motor cooling structure, motor and manufacturing method of motor - Google Patents
Motor cooling structure, motor and manufacturing method of motor Download PDFInfo
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- CN113394907A CN113394907A CN202110717948.9A CN202110717948A CN113394907A CN 113394907 A CN113394907 A CN 113394907A CN 202110717948 A CN202110717948 A CN 202110717948A CN 113394907 A CN113394907 A CN 113394907A
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- 238000001816 cooling Methods 0.000 title claims abstract description 153
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000002826 coolant Substances 0.000 claims abstract description 35
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 41
- 238000003754 machining Methods 0.000 claims 5
- 230000037237 body shape Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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Classifications
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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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a motor cooling structure, a motor and a manufacturing method of the motor, and relates to the technical field of motors. The plurality of the protrusions which are arranged at discrete intervals can effectively improve the flow speed and the turbulence of the cooling medium in the cooling groove, thereby improving the cooling capacity of the motor and increasing the power density of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor cooling structure, a motor and a manufacturing method of the motor.
Background
With the progress of society and the development of technology, in the field of motors, when the technology is relatively mature and the products are relatively standardized, how to improve the power density of the motor by refining the product development and design is a subject of current technical research, and an important factor for restricting the power density of the motor is that the insulation of a winding is damaged under a high-temperature condition, so that an effective cooling system is required to ensure that the motor works within a safe temperature range. In the prior art, a relatively common motor cooling system comprises a motor shell water jacket liquid cooling system, a shell air cooling system and the like, namely, cooling medium flows through a motor body structure to take away heat for cooling, but the existing motor body structure is not refined and perfect in research design on the aspect of cooling in cooperation with the cooling system, and further improvement can be made.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems to some extent.
To this end, in one aspect, the present invention provides a cooling structure for an electric motor, including a plurality of cooling grooves adapted to be disposed on an internal main structure of the electric motor, the cooling grooves being disposed along a direction of a rotation axis of the electric motor and adapted to circulate a cooling medium, a plurality of protrusions adapted to increase turbulence of the cooling medium in the cooling grooves being disposed on inner walls of the cooling grooves, and the plurality of protrusions being disposed at discrete intervals along a length direction of the cooling grooves.
Optionally, the inner wall of the cooling groove comprises a bottom wall and two oppositely arranged side walls, and a plurality of the protrusions are arranged on one of the side walls.
Optionally, a plurality of the protruding portions are uniformly distributed along the length direction of the cooling groove, and the protruding portions are rectangular.
Optionally, the cooling groove is linear and long along the direction of the rotating shaft of the motor.
Optionally, the cooling groove is in a spiral strip shape along the direction of the rotating shaft of the motor.
Compared with the prior art, the motor cooling structure provided by the invention has the following technical effects:
the motor cooling structure provided by the invention has the advantages that the plurality of cooling grooves are arranged in the motor, the plurality of protrusions are arranged on the inner walls of the cooling grooves and are arranged at discrete intervals, and the cooling medium circulates in the cooling grooves, so that the structure of discrete coarse elements capable of increasing the turbulence degree of a circulating medium boundary layer in fluid mechanics is formed, and the flow speed and the turbulence degree of the cooling medium in the cooling grooves can be effectively improved by the plurality of protrusions arranged at discrete intervals under the condition that the pressure and other conditions applied by a cooling system to the cooling medium are unchanged, so that the cooling capacity of the motor is improved, and the power density of the motor is increased. Meanwhile, the plurality of cooling grooves are formed in the motor, so that the cooling capacity of the motor can be further improved, the protruding portion structure is arranged, the contact area between the cooling medium and the cooling grooves is increased, and further the cooling medium can exchange more heat with the motor, so that the cooling capacity of the motor is further improved.
On the other hand, in order to solve the above problems, the present invention provides a motor, including the above motor cooling structure, further including a casing, and a stator and a rotor arranged in the casing, wherein the rotor is arranged in the stator, and a plurality of cooling grooves of the motor cooling structure are uniformly arranged on an outer circumferential surface of the stator and/or the rotor.
Optionally, a plurality of cooling grooves are uniformly distributed on the circumferential surface of the inner wall of the casing.
Compared with the prior art, the motor provided by the invention has the technical effect which is substantially the same as that of the motor cooling structure, and the details are not repeated.
In addition, in order to solve the above problems, the present invention also provides a method for manufacturing a motor, including the steps of:
preparing two groups of silicon steel sheets so that the outline shape of one group of the silicon steel sheets corresponds to the section shape of a rotor main body of the motor, and the outline shape of the other group of the silicon steel sheets corresponds to the section shape of a stator main body of the motor;
processing the outer circumference of one group of silicon steel sheets corresponding to the rotor to make the same shape as the section of the cooling groove of the motor, and/or processing the outer circumference of the other group of silicon steel sheets corresponding to the stator to make the same shape as the section of the cooling groove of the motor;
respectively stacking two groups of silicon steel sheets to manufacture main structures of the rotor and the stator, and installing accessories of the rotor and the stator;
preparing a housing of the motor, and assembling the rotor and the stator in the housing.
Optionally, the processing the outer circumference of the group of silicon steel sheets corresponding to the rotor, or the processing the outer circumference of the group of silicon steel sheets corresponding to the stator includes: and differentially processing the outer circumference of the silicon steel sheet so that part of the outer circumference of the silicon steel sheet has the same shape of the cross section of the convex part on the cooling groove.
Optionally, the respectively stacking two sets of the silicon steel sheets includes: and respectively and orderly stacking two groups of silicon steel sheets to manufacture the main structures of the rotor and the stator and manufacture the structures of the cooling grooves with a plurality of convex parts on the rotor and the stator.
Optionally, the preparing the housing of the motor includes: the circumferential surface of the inner wall of the shell is uniformly provided with a plurality of cooling grooves, and the inner walls of the cooling grooves are provided with the convex parts.
Compared with the prior art, the manufacturing method of the motor provided by the invention has the following technical effects:
the motor manufactured by the manufacturing method of the motor provided by the invention has the substantially same technical effects as the motor, and is not repeated herein.
Drawings
Fig. 1 is a schematic perspective view of a rotor of a motor according to an embodiment of the present invention;
FIG. 2 is a front view of a rotor of an electric machine according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a stator of a motor according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a housing of a motor according to an embodiment of the invention;
fig. 5 is an enlarged schematic view of a portion a in fig. 1.
Description of reference numerals:
10-rotor, 20-stator, 30-casing, 40-cooling groove, 41-boss, 42-side wall, 43-bottom wall.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that in the description of the present disclosure, the directions or positional relationships indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner" and "outer" are used as the directions or positional relationships indicated in the drawings, which are only for convenience of describing the present disclosure, but do not indicate or imply that the device referred to must have a specific direction, be configured and operated in a specific direction, and thus, should not be interpreted as limiting the scope of the present disclosure.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Moreover, although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 4, an embodiment of the present invention provides a motor cooling structure, which includes a plurality of cooling grooves 40 adapted to be disposed on an internal main structure of a motor, where the cooling grooves 40 are disposed along a direction of a rotation shaft of the motor and adapted to circulate a cooling medium, a plurality of protrusions 41 adapted to increase turbulence of the cooling medium in the cooling grooves 40 are disposed on an inner wall of the cooling grooves 40, and the plurality of protrusions 41 are disposed at discrete intervals along a length direction of the cooling grooves 40.
It should be noted that, the cooling grooves 40 provided in this embodiment may be disposed on the outer circumferential surface of the rotor 10 and/or the outer circumferential surface of the stator 20 and/or the inner circumferential surface of the casing 30, which are main structures of the motor, inside the motor, and the positions and the number of the cooling grooves 40 may be set according to actual working environment requirements of the motor and actual requirements on the cooling capability of the motor.
Preferably, the cooling grooves 40 are uniformly distributed on the outer circumferential surfaces of the rotor 10 and the stator 20 of the motor and on the circumferential surface of the inner wall of the casing 30, and the inner walls of the cooling grooves 40 are respectively provided with a plurality of protrusions 41 distributed at discrete intervals, so as to increase the flow rate and turbulence of the cooling medium inside the motor flowing in the cooling grooves 40 to the maximum extent, thereby improving the cooling capacity of the motor.
The motor cooling structure provided by the embodiment forms a structure of discrete roughness elements capable of increasing the turbulence degree of a circulating medium boundary layer in fluid mechanics by arranging the plurality of cooling grooves 40 in the motor, arranging the plurality of protrusions 41 at discrete intervals and circulating the cooling medium in the cooling grooves 40, so that the flow speed and the turbulence degree of the cooling medium in the cooling grooves 40 can be effectively improved by the plurality of protrusions 41 at discrete intervals in the embodiment under the condition that the pressure applied by a cooling system to the cooling medium and other conditions are not changed, further the cooling capacity of the motor is improved, and the power density of the motor is increased. Meanwhile, the plurality of cooling grooves 40 are formed in the motor, so that the cooling capacity of the motor can be further improved, and the structure of the protruding portion 41 is arranged, so that the contact area between the cooling medium and the cooling grooves 40 is increased, and further, the cooling medium can exchange more heat with the motor, so that the cooling capacity of the motor is further improved. Meanwhile, the different number of the cooling grooves 40 and the different number and different positions of the protrusions 41 in the cooling grooves 40 are combined, so that the flow rate and turbulence of the cooling medium in the motor can be effectively regulated without influencing the magnetic field and balance design of the motor, the cooling capacity required by the actual motor can be effectively regulated, and different practical operation requirements can be met.
It should be noted that the cooling medium described in this embodiment includes, but is not limited to, insulating liquid such as machine oil, non-insulating liquid such as non-deionized water, and gaseous medium such as air. The motor cooling structure provided by the embodiment can effectively improve the flow speed and the turbulence of the cooling medium in the cooling groove 40, and the principle of increasing the cooling capacity of the motor is the same.
Alternatively, as shown in fig. 1 to 5, the inner wall of the cooling groove 40 provided in the present embodiment includes a bottom wall 43 and two side walls 42 disposed opposite to each other, and a plurality of the protrusions 41 are disposed on one of the side walls 42.
In the present embodiment, the two side walls 42 are oppositely arranged, and by arranging the protrusions 41 on the side walls 42 of the cooling groove 40, when the cooling medium flows through the protrusions 41 on one of the side walls 42, the other side wall 42 oppositely arranged gives a reaction force to the cooling medium at the moment at the position, thereby improving the flow rate and turbulence of the flowing medium at the moment at the position to a certain extent, and further improving the cooling capability of the motor. It should be noted that a plurality of protrusions 41 may be simultaneously disposed on two opposite sidewalls 42, and the technical effect of increasing the flow velocity and turbulence of the cooling medium in the cooling groove 40 is also achieved.
Alternatively, as shown in fig. 1 to 5, a plurality of the protruding portions 41 provided in this embodiment are uniformly distributed along the length direction of the cooling groove 40, and the protruding portions 41 are in a rectangular shape.
In this embodiment, the plurality of protrusions 41 are uniformly distributed along the length direction of the cooling groove 40, so that the motor cooling structure of this embodiment is convenient to produce and process, the production process is orderly and controllable, and meanwhile, the flow rate and the turbulence of the cooling medium in the cooling groove 40 are convenient to control, and a cooling scheme can be provided more accurately for actual operation needs. And the convex part 41 is set to be in a regular rectangular shape, so that the controllability of the convex part 41 on the flow speed and the turbulence of the cooling medium can be further improved, and the cooling capacity of the motor can be conveniently regulated according to actual requirements. Meanwhile, the production and processing are convenient, and the product standardization is realized. Preferably, the protrusion 41 has a rectangular parallelepiped shape.
It should be noted that, in the embodiment, the main structures of the rotor 10 and the stator 20 of the motor may be formed by stacking silicon steel sheets, and under the condition of the production process, the protruding portion 41 is arranged to be in a regular rectangular shape, which is convenient for processing, that is, when the structures of the cooling groove 40 and the protruding portion 41 are produced and processed, the silicon steel sheets may be subjected to one-step stamping forming or formed by wire cutting, laser cutting, and the like, and then the silicon steel sheets are stacked in a certain order to form the three-dimensional structures of the cooling groove 40 and the protruding portion 41. Therefore, the convex part 41 is arranged to be in a regular rectangular shape, so that the production and processing efficiency can be effectively improved, the product quality can be conveniently controlled, and the product standardization and quality can be further improved.
Of course, the protrusion 41 may have other structural shapes, which may also have the effect of increasing the flow rate and turbulence of the cooling medium in the cooling groove 40, such as a cube or other irregular shapes, but under the consideration of increasing the flow rate and turbulence of the cooling medium and facilitating the production and processing, the three-dimensional structure of the protrusion 41 provided in this embodiment is preferably a cuboid. Meanwhile, it should be noted that the structural relationship between the protruding portion 41 and the cooling groove 40 is not limited to be integrally formed with the two, and the protruding portion 41 may also be designed separately and then fixedly connected to the inner wall of the cooling groove 40.
Alternatively, as shown in fig. 1 to 4, the cooling groove 40 provided in the present embodiment is elongated in a linear shape in the direction of the rotation shaft of the motor.
In the present embodiment, the cooling groove 40 is configured to be linear-shaped and long in the direction of the rotation shaft of the motor, so that the production and processing are facilitated, and the circulation of the cooling medium in the cooling groove 40 is facilitated.
Alternatively, the cooling groove 40 provided in this embodiment may also be a spiral strip along the direction of the rotating shaft of the motor.
In this embodiment, the cooling groove 40 is configured to be a spiral strip along the rotation axis of the motor, so as to further increase the flow rate and turbulence of the cooling medium in the cooling groove 40, that is, when the motor is in operation, the rotor 10 rotates to disturb the cooling medium inside the motor to rotate at the same time, and the cooling groove 40 is configured to be a spiral, so as to further increase the flow rate and turbulence of the cooling medium in the cooling groove 40 along with the rotation of the rotor 10, thereby further improving the cooling capacity of the motor.
As shown in fig. 1 to 4, another embodiment of the present invention provides a motor, which includes the above-mentioned motor cooling structure, and further includes a casing 30, and a stator 20 and a rotor 10 that are disposed in the casing 30, wherein the rotor 10 is disposed in the stator 20, and a plurality of cooling grooves 40 of the motor cooling structure are uniformly disposed on an outer circumferential surface of the stator 20 and/or the rotor 10.
Optionally, a plurality of cooling grooves 40 are uniformly distributed on the circumferential surface of the inner wall of the casing 30 provided in this embodiment.
In the present embodiment, a plurality of cooling grooves 40 are uniformly distributed on the outer circumferential surface of the rotor 10 and/or the outer circumferential surface of the stator 20 and/or the inner circumferential surface of the casing 30 inside the motor, so that the positions and the number of the cooling grooves 40 can be set according to the actual working environment requirement of the motor and the actual requirement on the cooling capacity of the motor.
Preferably, in the motor provided by this embodiment, the plurality of cooling grooves 40 are uniformly distributed on the outer circumferential surfaces of the rotor 10 and the stator 20, and on the circumferential surface of the inner wall of the casing 30, and the inner wall of the cooling groove 40 is provided with the plurality of protrusions 41 distributed at discrete intervals, so as to increase the flow rate and turbulence of the cooling medium inside the motor flowing in the cooling groove 40 to the maximum extent, thereby improving the cooling capability of the motor and increasing the power density of the motor.
It should be understood that the motor provided in this embodiment further includes other motor components, such as windings, which are not described in this embodiment, and a cooling system corresponding to the motor cooling structure, and under the condition that other components are not changed, and under the condition that the cooling system gives a constant pressure and flow rate to the cooling medium, the motor provided in this embodiment effectively improves the cooling capability of the motor by the motor cooling structure arranged inside the motor cooling structure and the above-mentioned structural arrangement of the cooling grooves 40 and the protrusions 41 in the motor cooling structure, thereby improving the power density of the motor. And is convenient for production and processing. The principle and the technical effect of the motor cooling structure are substantially the same, and the description is omitted.
Another embodiment of the present invention provides a method for manufacturing a motor, which is used for manufacturing the motor, and includes the following steps:
firstly, two groups of silicon steel sheets are prepared, so that the outline shape of one group of silicon steel sheets corresponds to the section shape of the rotor 10 main body of the motor, and the outline shape of the other group of silicon steel sheets corresponds to the section shape of the stator 20 main body of the motor.
And secondly, processing the outer circumference of one group of silicon steel sheets corresponding to the rotor 10 to manufacture the same shape as the section of the cooling groove 40 of the motor, and/or processing the outer circumference of the other group of silicon steel sheets corresponding to the stator 20 to manufacture the same shape as the section of the cooling groove 40 of the motor.
Specifically, the processing of the outer circumference of one group of silicon steel sheets corresponding to the rotor 10 or the processing of the outer circumference of the other group of silicon steel sheets corresponding to the stator 20 includes: the outer circumferences of the silicon steel sheets in the group are processed differently in a stamping or wire cutting, laser cutting or other manners, so that the outer circumferences of some of the silicon steel sheets have the same shape as the cross section of the convex parts 41 on the cooling groove 40.
And thirdly, respectively stacking two groups of silicon steel sheets to manufacture the main structures of the rotor 10 and the stator 20, and installing accessories of the rotor 10 and the stator 20.
Specifically, it includes to pile up respectively two sets of silicon steel sheet: two sets of the silicon steel sheets are sequentially stacked to form a main structure of the rotor 10 and the stator 20, and a structure of the cooling groove 40 having a plurality of the protrusions 41 on the rotor 10 and the stator 20.
It should be noted that the parts of the rotor 10 and the stator 20 include other necessary parts of the rotor 10 and the stator 20, such as an iron core or a winding, which are not described herein again. And the orderly stacking means that two groups of silicon steel sheets are selectively and sequentially stacked respectively, in order to form a three-dimensional structure having a plurality of cooling grooves 40 on the rotor 10 and the stator 20, and to form a three-dimensional structure having a plurality of protrusions 41 on the cooling grooves 40.
And step four, preparing a casing 30 of the motor, and assembling the rotor 10 and the stator 20 in the casing 30.
Optionally, the fourth step provided in this embodiment further includes: a plurality of cooling grooves 40 are uniformly distributed on the circumferential surface of the inner wall of the casing 30, and the inner wall of each cooling groove 40 is provided with the convex part 41.
In the present embodiment, by the method, that is, by selectively and differentially processing a plurality of silicon steel sheets, and then sequentially stacking them to form the main structure of the rotor 10 and the stator 20, and the structure of the cooling groove 40 on the rotor 10 and the stator 20 and the protruding portion 41 on the inner wall of the cooling groove 40, and further selectively processing the casing 30, the free combination of the rotor 10, the stator 20, and the casing 30 having the structure of the cooling groove 40 in the above embodiment can be achieved to form the motor in the above embodiment. The motor manufactured by the manufacturing method has substantially the same technical effects as the motor in the embodiment, and the details are not repeated herein. Meanwhile, the method has the advantages of simple process, convenient operation, easy realization, convenient batch production and processing, convenient standardized production of products and product quality control.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A cooling structure of an electric motor, comprising a plurality of cooling grooves (40) adapted to be disposed on an internal main structure of the electric motor, wherein the cooling grooves (40) are disposed along a rotation axis direction of the electric motor and adapted to circulate a cooling medium, a plurality of protrusions (41) adapted to increase turbulence of the cooling medium in the cooling grooves (40) are disposed on an inner wall of the cooling grooves (40), and the plurality of protrusions (41) are disposed at discrete intervals along a length direction of the cooling grooves (40).
2. The motor cooling structure according to claim 1, wherein the inner wall of the cooling groove (40) includes a bottom wall (43) and two side walls (42) disposed opposite to each other, and a plurality of the protrusions (41) are provided on one of the side walls (42).
3. The motor cooling structure according to claim 2, wherein a plurality of the protrusions (41) are uniformly arranged along a length direction of the cooling groove (40), and the protrusions (41) have a rectangular body shape.
4. The motor cooling structure according to claim 1, wherein the cooling groove (40) has a linear-type elongated shape or a spiral-type elongated shape in the direction of the rotational axis of the motor.
5. An electric machine, comprising the motor cooling structure according to any one of claims 1 to 4, and further comprising a housing (30), and a stator (20) and a rotor (10) disposed in the housing (30), wherein the rotor (10) is disposed in the stator (20), and a plurality of cooling grooves (40) of the motor cooling structure are uniformly disposed on an outer circumferential surface of the stator (20) and/or the rotor (10).
6. The electric machine according to claim 5, characterized in that a plurality of said cooling grooves (40) are uniformly distributed on the circumferential surface of the inner wall of said casing (30).
7. A method of manufacturing an electric machine for manufacturing an electric machine according to claim 5 or 6, comprising the steps of:
preparing two groups of silicon steel sheets so that the outline shape of one group of the silicon steel sheets corresponds to the section shape of a rotor (10) main body of the motor, and the outline shape of the other group of the silicon steel sheets corresponds to the section shape of a stator (20) main body of the motor;
machining the outer circumference of a set of the silicon steel sheets corresponding to the rotor (10) to make the same shape as the section of the cooling groove (40) of the motor, and/or machining the outer circumference of a set of the silicon steel sheets corresponding to the stator (20) to make the same shape as the section of the cooling groove (40) of the motor;
respectively stacking two groups of silicon steel sheets to manufacture the main structures of the rotor (10) and the stator (20), and installing accessories of the rotor (10) and the stator (20);
preparing a housing (30) of the electrical machine and assembling the rotor (10) and the stator (20) within the housing (30).
8. The manufacturing method of an electric motor according to claim 7, wherein the machining an outer circumference of a set of the silicon steel sheets corresponding to the rotor (10) or the machining an outer circumference of a set of the silicon steel sheets corresponding to the stator (20) comprises:
and differentially machining the outer circumferences of the silicon steel sheets to enable the outer circumferences of parts of the silicon steel sheets to have the same shapes of the cross sections of the convex parts (41) on the cooling groove (40).
9. The method of manufacturing an electric machine according to claim 8, wherein said respectively stacking two sets of said silicon steel sheets comprises:
sequentially stacking two groups of silicon steel sheets respectively to manufacture the main structures of the rotor (10) and the stator (20) and manufacturing the structure of the cooling groove (40) with a plurality of protrusions (41) on the rotor (10) and the stator (20).
10. The method of manufacturing an electric machine according to claim 9, wherein the preparing the machine housing (30) comprises: the circumferential surface of the inner wall of the shell (30) is uniformly provided with a plurality of cooling grooves (40), wherein the inner wall of each cooling groove (40) is provided with the protruding parts (41).
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| CN202110717948.9A CN113394907A (en) | 2021-06-28 | 2021-06-28 | Motor cooling structure, motor and manufacturing method of motor |
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| CN202110717948.9A CN113394907A (en) | 2021-06-28 | 2021-06-28 | Motor cooling structure, motor and manufacturing method of motor |
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| CN111509876A (en) * | 2020-05-27 | 2020-08-07 | 精进电动科技股份有限公司 | Stator core cooling structure and motor cooling system |
| CN112769294A (en) * | 2021-04-07 | 2021-05-07 | 天津市松正电动汽车技术股份有限公司 | Oil-cooling flat wire motor heat dissipation structure and motor |
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2021
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| CN108306444A (en) * | 2018-04-19 | 2018-07-20 | 中山职业技术学院 | Motor case channel structure and motor |
| CN111509876A (en) * | 2020-05-27 | 2020-08-07 | 精进电动科技股份有限公司 | Stator core cooling structure and motor cooling system |
| CN112769294A (en) * | 2021-04-07 | 2021-05-07 | 天津市松正电动汽车技术股份有限公司 | Oil-cooling flat wire motor heat dissipation structure and motor |
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