CN216599242U - Motor cooling structure and motor - Google Patents
Motor cooling structure and motor Download PDFInfo
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- CN216599242U CN216599242U CN202123060501.3U CN202123060501U CN216599242U CN 216599242 U CN216599242 U CN 216599242U CN 202123060501 U CN202123060501 U CN 202123060501U CN 216599242 U CN216599242 U CN 216599242U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model provides a motor cooling structure and a motor, wherein the motor cooling structure comprises a motor body, the motor body is provided with a motor shell and a stator core arranged in the motor shell, a core cooling flow channel is arranged in the motor shell, and a cooling medium after heat exchange with the stator core flows out of the core cooling flow channel, then enters a heat exchanger for cooling and then can enter the motor shell to cool an end winding at least at one end of the stator core. According to the utility model, the cooling medium after heat exchange with the stator core is cooled in the heat exchanger and then guided to the end winding to cool the end winding, so that the stator core can be efficiently cooled, the end winding can be efficiently cooled, a motor body is effectively prevented from forming a local heat isolated island, and the service life and the performance of the motor are improved.
Description
Technical Field
The utility model belongs to the technical field of motor manufacturing, and particularly relates to a motor cooling structure and a motor.
Background
At present, new energy automobile main drive motor is at the actual motion in-process, and when being in the big moment of torsion of low-speed, main drive motor's stator can send a large amount of heats, for effectively improving and generate heat, current cooling technology has updated to the oil cooling technique from traditional water-cooling technique, adopts oil cooling formula cooling, and the cooling oil can be directly with the contact of the motor source that generates heat to accomplish the pertinence cooling structurally, main drive motor each source that generates heat obtains effective cooling.
However, in the existing oil cooling technology, the front end winding and the rear end winding are mainly cooled, the stator core is cooled, heat is transferred to the shell through heat conduction, and the heat is taken away through the flow of circulating water, so that the cooling mode easily causes uneven cooling of the stator to form a local heat island; the disadvantage is limited by the mounting position of the pumping component and the heat exchanger concentrated at the rear end of the motor, the cooling oil output by the pumping component firstly enters the heat exchanger and then enters each heating source in the motor, so the cooling oil output by the pumping component directly enters the front end winding and the rear end winding after entering the heat exchanger, and then the stator core cannot be directly or preferentially cooled.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a motor cooling structure and a motor, which can overcome the defects that the stator core and the end winding of the main drive motor cannot be effectively cooled and the service life and the performance of the motor are reduced in the related art.
In order to solve the above problems, the present invention provides a motor cooling structure, which includes a motor body, where the motor body has a motor casing and a stator core therein, the motor casing has a core cooling flow channel, and a cooling medium after heat exchange with the stator core flows out of the core cooling flow channel, enters a heat exchanger, is cooled, and then can enter the motor casing to cool an end winding at least one end of the stator core.
In some embodiments, the motor body is in a horizontal structure, an oil sump is configured on the motor casing, and the motor casing further includes a pumping member, and the pumping member is capable of pumping the cooling medium collected in the oil sump into the core cooling flow channel.
In some embodiments, the motor housing has an inner wall that cooperates with the stator core, the inner wall having a helical groove configured thereon, the helical groove having an opening toward a side of the stator core, the helical groove and an outer peripheral wall of the stator core together forming the core cooling flow passage.
In some embodiments, the stator core has a mating surface that mates with the motor casing, the mating surface having a thermally conductive material thereon that has a higher thermal conductivity than the stator core; and/or the cooling medium is cooling oil.
In some embodiments, a rear end cover is connected to the first end of the motor body, a first end cover flow passage is configured on the rear end cover, one end of the first end cover flow passage is communicated with an outlet of the heat exchanger, the other end of the first end cover flow passage is communicated with a first oil injection ring, and the first oil injection ring can inject a cooling medium therein onto a radial inner ring of the end winding corresponding to the position of the rear end cover.
In some embodiments, the first oil injection ring comprises a plurality of sections of first arc-shaped pipes, a plurality of first spray holes are formed in the inner walls of the first arc-shaped pipes, and the first arc-shaped pipes are sequentially communicated in a butt joint mode along the circumferential direction to form the first oil injection ring.
In some embodiments, a casing flow passage communicating with the first end cover flow passage is configured in the motor casing, and a second oil injection ring is arranged on the inner side of the motor casing and communicated with the casing flow passage so as to be capable of injecting the cooling medium therein onto the radial outer ring of the end winding corresponding to the position of the rear end cover.
In some embodiments, the second oil injection ring comprises a plurality of sections of second arc-shaped pipes, a plurality of second spray holes are formed in the inner walls of the second arc-shaped pipes, and the plurality of second arc-shaped pipes are sequentially communicated in a butt joint mode along the circumferential direction to form the second oil injection ring.
In some embodiments, a front end cover is connected to the second end of the motor body, and a second end cover flow passage is formed in the front end cover, one end of the second end cover flow passage is communicated with the casing flow passage, and the other end of the second end cover flow passage is communicated with the other first oil injection ring; and/or the position of the shell flow passage, which is matched with the front end cover, is communicated with the other second oil injection ring.
In some embodiments, a T-shaped pipe is arranged between the rear end cover and the motor casing, and the T-shaped pipe can communicate the first end cover flow passage, the casing flow passage and the corresponding second oil injection ring; and/or a T-shaped pipe is arranged between the front end cover and the motor shell, and the second end cover flow passage, the shell flow passage and the corresponding second oil injection ring can be communicated through the T-shaped pipe.
The utility model also provides a motor, which comprises a motor cooling structure, wherein the motor cooling structure is the motor cooling structure.
According to the motor cooling structure and the motor, the cooling medium after heat exchange with the stator core is cooled in the heat exchanger and then guided to the end winding to cool the end winding, so that the stator core can be efficiently cooled, the end winding can be efficiently cooled, a motor body is effectively prevented from forming a local heat island, and the service life and the performance of the motor are improved.
Drawings
Fig. 1 is a schematic structural diagram of a cooling structure of a motor according to an embodiment of the present invention (including the interior of a motor body, in which arrows show the flow direction of a cooling medium);
fig. 2 is a schematic perspective view of the motor casing in fig. 1;
fig. 3 is an assembly view of the stator core and end windings of fig. 1;
FIG. 4 is a perspective view (partially in section) of the rear end cap of FIG. 1;
FIG. 5 is a schematic perspective view (partially in section) of the front end cap of FIG. 1;
fig. 6 is a schematic perspective view of the first oil spray ring in fig. 1;
fig. 7 is a schematic perspective view of the second oil spray ring in fig. 1;
FIG. 8 is a perspective view of the T-shaped pipe in FIG. 1.
The reference numerals are represented as:
1. a motor housing; 11. an iron core cooling runner; 111. an iron core cooling medium introduction port; 12. an oil sump; 13. a casing flow channel; 14. an assembly groove; 21. a stator core; 22. an end winding; 3. a heat exchanger; 4. a pumping member; 51. a first oil spray ring; 511. a first arcuate tube; 512. a first nozzle hole; 52. a second spray ring; 521. a second arcuate tube; 522. a second nozzle hole; 523. a connecting portion; 61. a rear end cap; 611. a first end cap flow passage; 612. an oil drain hole; 62. a front end cover; 621. a second end cap flow passage; 622. an oil inlet hole; 623. a pump oil hole; 7. a T-shaped pipe; 8. a thermally conductive material.
Detailed Description
Referring to fig. 1 to 8 in combination, according to an embodiment of the present invention, there is provided a motor cooling structure, including a motor body, where the motor body has a motor casing 1 and a stator core 21 therein, the motor casing 1 has a core cooling flow channel 11 therein, and a cooling medium after exchanging heat with the stator core 21 flows out of the core cooling flow channel 11, enters a heat exchanger 3, and is cooled, and then can enter an end winding 22 of the motor casing 1 to cool at least one end of the stator core 21, and it can be understood that the heat exchanger 3 is disposed outside the motor body. In the technical scheme, the cooling medium after heat exchange with the stator core 21 is cooled in the heat exchanger 3 and then guided to the end winding 22 to cool the end winding, so that the efficient cooling of the end winding 22 can be realized while the stator core 21 is efficiently cooled, a motor body is effectively prevented from forming a local heat island, and the service life and the performance of the motor are improved.
In some embodiments, the motor body is in a horizontal structure, the motor casing 1 is configured with an oil pool 12 at a bottom position of the motor casing 1, and the motor body further includes a pumping member 4 (when the cooling medium is cooling oil, the pumping member 4 is an oil pump), and the pumping member 4 is capable of pumping the cooling medium collected in the oil pool 12 into the core cooling flow passage 11. In this technical scheme, the pumping unit 4 pumps the cooling medium (for example, cooling oil) in the oil pool 12 in the motor casing 1 into the iron core cooling flow channel 11, and an external cooling medium is not required, which is beneficial to simplifying the overall structure of the motor. In a specific implementation manner, the pumping part 4 and the heat exchanger 3 are respectively located at two axial ends of the motor casing 1, so as to prevent possible interference of the pumping part and the heat exchanger on the pipeline design, and optimize the structural design of the motor cooling structure.
In some embodiments, the stator core 21 has a mating surface that mates with the motor casing 1, and the mating surface has a heat conductive material 8 thereon, and the heat conductive material 8 has a higher thermal conductivity than the stator core 21, so that heat of the stator core 21 can be more efficiently conducted toward one side of the motor casing 1, and the heat conductive material 8 may be, for example, diamond or graphene film with high thermal conductivity.
In some embodiments, a rear end cover 61 is connected to the first end of the motor body, a first end cover flow passage 611 is configured on the rear end cover 61, one end of the first end cover flow passage 611 communicates with the outlet of the heat exchanger 3, the other end of the first end cover flow passage 611 communicates with a first oil injection ring 51, the first oil injection ring 51 can inject a cooling medium therein onto a radially inner ring of the end winding 22 corresponding to the position of the rear end cover 61, and by injecting the cooling medium onto the radially inner ring of the end winding 22, efficient cooling of the end winding 22 can be achieved specifically.
As a specific structural form of the first oil injection ring 51, the first oil injection ring 51 includes a plurality of segments of first arc-shaped tubes 511, a plurality of first injection holes 512 are configured on an inner wall of the first arc-shaped tubes 511, the plurality of first arc-shaped tubes 511 are sequentially communicated in a butt joint manner along a circumferential direction to form the first oil injection ring 51, and the plurality of first injection holes 512 can be preferably uniformly arranged in the circumferential direction to achieve uniform cooling of the end winding 22.
In some embodiments, a casing flow channel 13 communicating with the first end cover flow channel 611 is configured in the motor casing 1, a second oil injection ring 52 is disposed on the inner side of the motor casing 1, the second oil injection ring 52 communicates with the casing flow channel 13 to be able to inject a cooling medium therein onto the radially outer ring of the end winding 22 corresponding to the position of the rear end cover 61, and by injecting the cooling medium onto the radially outer ring of the end winding 22, efficient cooling of the end winding 22 can be further achieved specifically. Similar to the structure of the first oil injection ring 51, the second oil injection ring 52 includes a multi-segment second arc-shaped pipe 521, a plurality of second nozzle holes 522 are configured on the inner wall of the second arc-shaped pipe 521, and the plurality of second arc-shaped pipes 521 are sequentially communicated in a butt joint manner along the circumferential direction to form the second oil injection ring 52. The first oil injection ring 51 and the second oil injection ring 52 respectively have corresponding connecting portions 523 to be capable of forming a fixed connection with corresponding fixing components, taking the second oil injection ring 52 as an example, the motor housing 1 has an assembly groove 14, and the connecting portions 523 of the second oil injection ring 52 are embedded in the assembly groove 14 to realize the position fixing of the assembly groove. The first oil injection ring 51 may be fixedly assembled with the front end cover 62 or the rear end cover 61.
The first oil injection ring 51 and the second oil injection ring 52 may be made of a plastic material.
The front end cover 62 is connected to the second end of the motor body, and in some embodiments, a second end cover flow passage 621 is configured on the front end cover 62, and one end of the second end cover flow passage 621 is communicated with the casing flow passage 13, and the other end of the second end cover flow passage is communicated with another first oil injection ring 51; and/or another second oil injection ring 52 is communicated with the position of the casing flow channel 13 corresponding to the front end cover 62, so that the end windings 22 at two ends of the stator core 21 are efficiently cooled at the same time.
In some embodiments, a T-shaped pipe 7 is disposed between the rear end cover 61 and the motor casing 1, and the T-shaped pipe 7 can communicate the first end cover flow passage 611, the casing flow passage 13, and the corresponding second oil injection ring 52; and/or a T-shaped pipe 7 is arranged between the front end cover 62 and the motor casing 1, and the second end cover flow passage 621, the casing flow passage 13 and the corresponding second oil injection ring 52 can be communicated by the T-shaped pipe 7. It should be noted that the pipe orifice of the T-shaped pipe 7 is provided with a corresponding sealing ring, so that the sealing performance of the joints between the front end cover 62 and the motor casing 1 and between the rear end cover 61 and the motor casing 1 can be ensured by arranging the T-shaped pipe 7.
Referring specifically to fig. 1, the flow of the cooling medium (cooling oil) in the present invention is as follows:
oil pump suction → oil inlet port 622 (on front end cover 62) → core cooling medium introduction port 111 → core cooling flow passage 11 → oil discharge port 612 (on rear end cover 61) → heat exchanger 3 → first end cover flow passage 611;
1. first end cap flow passage 611 → first oil jet ring 51 → inner ring of end winding 22 corresponding to the position of the rear end cap;
2. the first end cover flow passage 611 → the T-shaped pipe 7 (corresponding to the position of the rear end cover 61) → the second oil jet ring 52 → the outer ring of the end winding 22 corresponding to the position of the rear end cover;
3. first end cover flow passage 611 → T-shaped pipe 7 (corresponding to the position of rear end cover 61) → cabinet flow passage 13 → T-shaped pipe 7 (corresponding to the position of front end cover 62);
t-shaped pipe 7 (corresponding to the position of the front end cover 62) → second oil jet ring 52 → the outer ring of the end winding 22 corresponding to the position of the front end cover;
t-shaped pipe 7 (corresponding to the position of the front end cover 62) → second end cover flow passage 621 → first oil jet ring 51 → the outer race of the end winding 22 corresponding to the position of the front end cover.
This kind of cooling method can fundamentally solve current water-cooled main motor stator core that drives, end winding can't obtain the difficult problem of effective cooling, and then the inside main heat dispersion that generates heat source of reinforcing motor promotes motor power density, and the reinforcing performance simplifies the complicated outside cooling structure of current traditional oil cold model machine simultaneously, practices thrift the cost, realizes the lightweight of main motor system that drives, integrates.
According to an embodiment of the utility model, the motor, especially the main drive motor applied to the new energy vehicle, further comprises a motor cooling structure, and the motor cooling structure is the motor cooling structure.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (11)
1. The utility model provides a motor cooling structure, its characterized in that, includes motor body, motor body has motor housing (1) and is in stator core (21) in it, have iron core cooling runner (11) in motor housing (1), with coolant after stator core (21) heat transfer is followed can get into after iron core cooling runner (11) flow out after getting into heat exchanger (3) internal cooling motor housing (1) internal cooling the end winding (22) of at least one end of stator core (21).
2. The motor cooling structure according to claim 1, wherein the motor body is a horizontal structure, an oil pool (12) is configured on the motor casing (1), and the motor cooling structure further comprises a pumping member (4), and the pumping member (4) is capable of pumping the cooling medium collected in the oil pool (12) into the core cooling flow passage (11).
3. The motor cooling structure according to claim 1, characterized in that the motor housing (1) has an inner wall that engages with the stator core (21), the inner wall being configured with a helical groove having an opening toward a side of the stator core (21), the helical groove forming the core cooling flow passage (11) together with an outer peripheral wall of the stator core (21).
4. The motor cooling structure according to claim 1, wherein the stator core (21) has a mating surface with which the motor case (1) is mated, the mating surface having a heat conductive material (8) thereon, the heat conductive material (8) having a higher heat conductivity than the stator core (21); and/or the cooling medium is cooling oil.
5. The motor cooling structure according to any one of claims 1 to 4, characterized in that a rear end cover (61) is connected to the first end of the motor body, a first end cover flow passage (611) is formed in the rear end cover (61), one end of the first end cover flow passage (611) communicates with an outlet of the heat exchanger (3), the other end of the first end cover flow passage (611) communicates with a first oil jet ring (51), and the first oil jet ring (51) can jet the cooling medium therein onto a radially inner ring of the end winding (22) corresponding to the position of the rear end cover (61).
6. The motor cooling structure according to claim 5, wherein the first oil spray ring (51) comprises a plurality of segments of first arc-shaped pipes (511), a plurality of first spray holes (512) are formed in the inner walls of the first arc-shaped pipes (511), and the plurality of first arc-shaped pipes (511) are sequentially communicated in a butt joint mode along the circumferential direction to form the first oil spray ring (51).
7. The motor cooling structure according to claim 5, characterized in that a housing flow passage (13) communicating with the first end cover flow passage (611) is configured in the motor housing (1), and a second oil jet ring (52) is provided on the inner side of the motor housing (1), the second oil jet ring (52) communicating with the housing flow passage (13) to be able to jet the cooling medium therein onto the radially outer ring of the end winding (22) corresponding to the position of the rear end cover (61).
8. The motor cooling structure according to claim 7, wherein the second oil injection ring (52) comprises a plurality of segments of second arc-shaped pipes (521), a plurality of second spray holes (522) are formed in the inner wall of the second arc-shaped pipes (521), and the plurality of second arc-shaped pipes (521) are sequentially communicated in a butt joint mode along the circumferential direction to form the second oil injection ring (52).
9. The motor cooling structure according to claim 7, wherein a front cover (62) is connected to the second end of the motor body, and a second cover flow passage (621) is formed in the front cover (62), and one end of the second cover flow passage communicates with the housing flow passage (13) and the other end of the second cover flow passage communicates with the other first oil jet ring (51); and/or the shell flow passage (13) is communicated with another second oil injection ring (52) at a position corresponding to the front end cover (62).
10. The motor cooling structure according to claim 9, wherein a T-shaped pipe (7) is arranged between the rear end cover (61) and the motor casing (1), and the T-shaped pipe (7) can communicate the first end cover flow passage (611), the casing flow passage (13) and the corresponding second oil injection ring (52); and/or a T-shaped pipe (7) is arranged between the front end cover (62) and the motor shell (1), and the second end cover flow passage (621), the shell flow passage (13) and the corresponding second oil injection ring (52) can be communicated through the T-shaped pipe (7).
11. An electric machine comprising a machine cooling structure, characterized in that the machine cooling structure is the machine cooling structure of any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123060501.3U CN216599242U (en) | 2021-12-07 | 2021-12-07 | Motor cooling structure and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123060501.3U CN216599242U (en) | 2021-12-07 | 2021-12-07 | Motor cooling structure and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216599242U true CN216599242U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123060501.3U Active CN216599242U (en) | 2021-12-07 | 2021-12-07 | Motor cooling structure and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216599242U (en) |
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2021
- 2021-12-07 CN CN202123060501.3U patent/CN216599242U/en active Active
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