CN115133716A - Motor cooling structure and motor - Google Patents
Motor cooling structure and motor Download PDFInfo
- Publication number
- CN115133716A CN115133716A CN202110333241.8A CN202110333241A CN115133716A CN 115133716 A CN115133716 A CN 115133716A CN 202110333241 A CN202110333241 A CN 202110333241A CN 115133716 A CN115133716 A CN 115133716A
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- Prior art keywords
- oil
- stator
- cavity
- rotor
- core
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- 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.)
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- 238000001816 cooling Methods 0.000 title claims abstract description 91
- 238000004804 winding Methods 0.000 claims abstract description 63
- 239000003921 oil Substances 0.000 claims description 226
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000010724 circulating oil Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010705 motor oil Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention belongs to the technical field of driving motors, and relates to a motor cooling structure and a motor. The motor cooling structure comprises a stator assembly, a rotor assembly, an oil pipe, an end cover, a cover plate and a first bearing, wherein an oil inlet cavity is formed in the end cover, a first cavity is formed between the end cover and the cover plate, a second cavity is formed between the stator assembly and the end cover, and the first bearing is positioned in the second cavity; the end cover is provided with an oil inlet cavity, the radial outer end of the first cavity and the radial outer end of the second cavity are communicated with the oil inlet cavity, the oil pipe is provided with an oil inlet, a first oil outlet and a second oil outlet, the first oil outlet is communicated with the oil inlet cavity, and the second oil outlet is communicated with the stator core groove. The motor cooling structure of this application can cool off stator core, winding, rotor core and first bearing, improves the motor cooling effect, improves motor performance and power density, and stator core can reduce volume to reduce cost.
Description
Technical Field
The invention belongs to the technical field of driving motors, and particularly relates to a motor cooling structure and a motor.
Background
At present, with the development of new energy automobiles, the requirements on endurance are higher and higher, and the requirements on motor performance and power density are higher and higher. The driving motor is a key part of an integrated electric driving system, a motor cooling system (such as a motor oil cooling system) plays a key role in improving the performance of the motor, and the design of the motor oil cooling system is one of key factors.
According to the existing motor oil cooling system, a stator core is grooved and is in interference fit with a shell, and oil baffle plates are added at two ends of the stator core to form a stator circulating oil path so as to realize motor cooling.
However, the existing motor oil cooling system has a large stator core and high cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the motor cooling structure and the motor are provided for solving the problem that an existing motor oil cooling system is large in stator core.
In order to solve the technical problem, in one aspect, an embodiment of the present invention provides a motor cooling structure, including a stator assembly, a rotor assembly, an oil pipe, an end cover, a cover plate, and a first bearing, where the stator assembly includes a stator core, the rotor assembly includes a rotating shaft and a rotor core fixed on the rotating shaft, the stator core is disposed outside the rotor core, the end cover is disposed at a first end of the stator assembly, the end cover is connected to the rotating shaft through the first bearing, and the cover plate is connected to a side of the end cover, which is away from the stator assembly;
the stator core is provided with a plurality of axially extending stator core grooves, the end cover is provided with an oil inlet cavity, a first cavity is formed between the end cover and the cover plate, a second cavity is formed between the stator component and the end cover, the radial outer end of the first cavity and the radial outer end of the second cavity are both communicated with the oil inlet cavity, the first bearing is positioned in the second cavity, and the radial inner end of the first cavity is communicated with the inner cavity of the rotating shaft;
the oil pipe is provided with an oil inlet, a first oil outlet and a second oil outlet, the oil inlet is connected with an oil pump, the first oil outlet is communicated with the oil inlet cavity, and the second oil outlet is communicated with the stator iron core groove.
Optionally, the stator assembly further includes a first winding, a second winding, a first stator oil baffle and a second stator oil baffle, the first winding is disposed at the first end of the stator core, the second winding is disposed at the second end of the stator core, the first stator oil baffle is disposed at the first end of the stator core and sleeved on the first winding, and the second stator oil baffle is disposed at the second end of the stator core and sleeved on the second winding;
a first stator oil cavity is formed between the first stator oil baffle plate and the first end of the stator core, a second stator oil cavity is formed between the second stator oil baffle plate and the second end of the stator core, and the plurality of stator core grooves are communicated with the first stator oil cavity and the second stator oil cavity to form a stator circulating oil way.
Optionally, a first gap is formed between the radial inner side of the first stator oil baffle plate and the radial outer side of the first winding, a first channel which communicates the first gap with the first stator oil cavity is arranged on the first stator oil baffle plate, and part of the cooling oil in the first stator oil cavity is thrown to the first winding through the first channel;
and a second gap is formed between the radial inner side of the second stator oil baffle plate and the radial outer side of the second winding, a second channel for communicating the second gap with the second stator oil cavity is arranged on the second stator oil baffle plate, and part of cooling oil in the second stator oil cavity is thrown to the second winding through the second channel.
Optionally, the first stator oil baffle plate is provided with a plurality of first stoppers along a circumferential direction thereof to divide the first stator oil cavity into a plurality of first stator oil distribution cavities, each first stator oil distribution cavity corresponds to one first channel, and each first stator oil distribution cavity corresponds to two sets of stator core slots;
the second stator oil baffle plate is provided with a plurality of second baffle blocks along the circumferential direction of the second stator oil baffle plate so as to divide the second stator oil cavity into a plurality of second stator oil distribution cavities, each second stator oil distribution cavity corresponds to one second channel, the second oil outlet is communicated with one of the second stator oil distribution cavities, and each second stator oil distribution cavity corresponds to two groups of stator iron core grooves;
and cooling oil enters the second stator oil distributing cavity through the stator core slots and then respectively enters the two adjacent first stator oil distributing cavities through the two groups of stator core slots.
Optionally, the motor cooling structure further includes a small oil pipe connected to the cover plate, the small oil pipe extends into the inner cavity of the rotating shaft, and a through hole communicating the radial inner end of the second cavity with the inner cavity of the rotating shaft is formed in the small oil pipe.
Optionally, the rotor assembly further includes a first rotor baffle and a second rotor baffle, the first rotor baffle is disposed at a first end of the rotor core and sleeved on the rotating shaft, and the second rotor baffle is disposed at a second end of the rotor core and sleeved on the rotating shaft;
the first rotor baffle is provided with a first radial groove, the second rotor baffle is provided with a second radial groove, the rotating shaft is provided with a first through hole for communicating the inner end of the first radial groove with the inner cavity of the rotating shaft and a second through hole for communicating the inner end of the second radial groove with the inner cavity of the rotating shaft, the outer end of the first radial groove faces the first winding, and the outer end of the second radial groove faces the second winding;
and the rotor core is provided with a rotor circulating oil passage for communicating the first radial groove and the second radial groove.
Optionally, the rotor circulation oil passage is formed by sequentially communicating magnetic steel grooves in the rotor core. Like this, the cooling oil is direct to the magnet steel cooling, simplifies the magnet steel cooling problem, can select the low grade magnet steel of temperature to reduce cost.
Optionally, the motor cooling structure further includes a housing and a second bearing connected to the second end of the rotating shaft, the stator assembly is installed in the housing, and the housing is provided with a bearing cooling oil passage for providing cooling oil to the second bearing.
And cooling oil thrown to the first winding and the second winding finally falls into the bottom of the shell.
Optionally, an oil groove is formed in the end cover, a radial outer end of the oil groove is communicated with the oil inlet cavity, and a radial inner end of the oil groove extends to the first bearing.
According to the motor cooling structure of the embodiment of the application, when the motor rotates, cooling oil enters the oil pipe through the oil pump, the cooling oil is divided into two paths to be cooled, one path of cooling oil enters the stator iron core groove through the second oil outlet of the oil pipe, and the other path of cooling oil enters the end cover through the first oil outlet of the oil pipe. The cooling oil entering the stator core slot can cool the stator core and windings (a first winding and a second winding) at two ends of the stator core; the cooling oil entering the end cover enters an oil inlet cavity of the end cover and then flows in two branches. One branch cools the first bearing through the second chamber, and the other branch flows into the inner cavity of the rotating shaft through the first chamber to cool the rotor core. The motor cooling structure of this application can cool off stator core, winding, rotor core and first bearing simultaneously, improves the motor cooling effect, improves motor performance and power density. Thus, the stator core can be reduced in size appropriately to reduce the cost.
The cooling mode of the rotor core is specifically that the cooling oil entering the shaft cavity of the rotating shaft enters a first radial groove of the first rotor baffle and a second radial groove of the second rotor baffle through a first through hole and a second through hole on the rotating shaft respectively, and then enters the rotor circulating oil duct through the first radial groove and the second radial groove so as to cool the rotor core (magnetic steel). And finally, the cooling oil is thrown out from the outer ends of the first radial groove and the second radial groove so as to respectively cool the first winding and the second winding. Therefore, the first winding and the second winding are cooled twice, and the cooling effect of the first winding and the second winding is improved.
On the other hand, the embodiment of the invention also provides a motor, which comprises the motor cooling structure.
Drawings
Fig. 1 is a side view of a cooling structure of a motor according to an embodiment of the present invention;
fig. 2 is a front view of a cooling structure of a motor according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;
FIG. 4 is a schematic diagram of a first stator oil baffle of a motor cooling structure according to an embodiment of the present invention;
fig. 5 is a schematic view of a second stator oil baffle of the motor cooling structure according to an embodiment of the present invention;
fig. 6 is a schematic view of a stator core of a motor cooling structure according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a stator assembly; 11. a stator core; 111. a stator core slot; 12. a first winding; 13. a second winding; 14. a first stator oil baffle plate; 141. a first channel; 142. a first stopper; 15. a second stator oil baffle plate; 151. a second channel; 152. a second stopper; 16. a first stator oil chamber; 161. a first stator oil distributing cavity; 17. a second stator oil chamber; 171. a second stator oil distribution cavity; 2. a rotor assembly; 21. a rotating shaft; 22. a rotor core; 221. a rotor circulation oil passage; 23. a first rotor baffle; 231. a first radial groove; 24. a second rotor baffle; 241. a second radial groove; 3. an oil pipe; 31. an oil inlet; 32. a first oil outlet; 33. a second oil outlet; 4. an end cap; 41. an oil inlet cavity; 42. an oil sump; 5. a cover plate; 6. a first bearing; 7. a small oil pipe; 71. a through hole; 8. a second bearing; j1, first gap; j2, second gap; q1, first chamber; q2, second chamber.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 6, an embodiment of the present invention provides a motor cooling structure, including a stator assembly 1, a rotor assembly 2, an oil pipe 3, an end cover 4, a cover plate 5, and a first bearing 6, where the stator assembly 1 includes a stator core 11, the rotor assembly 2 includes a rotating shaft 21 and a rotor core 22 fixed on the rotating shaft 21, the stator core 11 is disposed outside the rotor core 22, the end cover 4 is disposed at a first end of the stator assembly 1, the end cover 4 is connected to the rotating shaft 21 through the first bearing 6, and the cover plate 5 is connected to a side of the end cover 4 away from the stator assembly 1.
Be provided with a plurality of stator core grooves 111 of axial extension on the stator core 11, be provided with oil feed chamber 41 on the end cover 4, form first cavity Q1 between end cover 4 and the apron 5, stator module 1 with form second cavity Q2 between the end cover 4, the radial outer end of first cavity Q1 and the radial outer end of second cavity Q2 all with oil feed chamber 41 intercommunication, first bearing 6 is located in second cavity Q2, the radial inner of first cavity Q1 with the inner chamber intercommunication of pivot 21.
The oil pipe 3 is provided with an oil inlet 31, a first oil outlet 32 and a second oil outlet 33, the oil inlet 31 is connected with an oil pump, the first oil outlet 32 is communicated with the oil inlet cavity 41, and the second oil outlet 33 is communicated with the stator core groove 111.
In an embodiment, stator assembly 1 further includes a first winding 12, a second winding 13, a first stator oil baffle 14 and a second stator oil baffle 15, first winding 12 is disposed at a first end of stator core 11, second winding 13 is disposed at a second end of stator core 11, first stator oil baffle 14 is disposed at a first end of stator core 11 and sleeved on first winding 12, and second stator oil baffle 15 is disposed at a second end of stator core 11 and sleeved on second winding 13.
The first stator oil baffle plate 14 and a first end of the stator core 11 form a first stator oil cavity 16, the second stator oil baffle plate 15 and a second end of the stator core 11 form a second stator oil cavity 17, and the stator core slots 111 are communicated with the first stator oil cavity 16 and the second stator oil cavity 17 to form a stator circulating oil path for cooling the stator core 11.
In an embodiment, a first gap J1 is formed between a radially inner side of the first stator oil baffle 14 and a radially outer side of the first winding 12, a first passage 141 communicating the first gap J1 with the first stator oil chamber 16 is provided on the first stator oil baffle 14, and a part of the cooling oil in the first stator oil chamber 16 is thrown toward the first winding 12 through the first passage 141. A second gap J2 is formed between the radial inner side of the second stator oil baffle plate 15 and the radial outer side of the second winding 13, a second channel 151 communicating the second gap J2 with the second stator oil cavity 17 is arranged on the second stator oil baffle plate 15, and part of the cooling oil in the second stator oil cavity 17 is thrown to the second winding 13 through the second channel 151.
In an embodiment, the first stator oil baffle plate 14 is provided with a plurality of first stoppers 142 along a circumferential direction thereof to divide the first stator oil chamber 16 into a plurality of first stator oil distribution chambers 161, each of the first stator oil distribution chambers 161 corresponds to one of the first channels 141, and each of the first stator oil distribution chambers 161 corresponds to two sets of the stator core slots 111; the second stator oil baffle plate 15 is provided with a plurality of second stoppers 152 along the circumferential direction thereof so as to divide the second stator oil cavity 17 into a plurality of second stator oil distribution cavities 171, each second stator oil distribution cavity 171 corresponds to one second channel 151, the second oil outlet 33 is communicated with one of the second stator oil distribution cavities 171, and each second stator oil distribution cavity 171 corresponds to two sets of stator core slots 111; after entering the second stator oil distribution chamber 171 through the stator core slots 111, the cooling oil enters the two adjacent first stator oil distribution chambers 161 through the two stator core slots 111. A stator circulation oil path is formed by the sequential communication of the plurality of first stator oil-dividing chambers 161, the plurality of second stator oil-dividing chambers 171, and the plurality of stator core slots 111. Thus, the cooling oil flows through the stator core, and the cooling effect of the stator core 11 is improved.
In an embodiment, the motor cooling structure further includes a small oil pipe 7 connected to the cover plate 5, the small oil pipe 7 extends into the inner cavity of the rotating shaft 21, and a through hole 71 communicating the radially inner end of the second chamber Q2 with the inner cavity of the rotating shaft 21 is formed in the small oil pipe 7. Cooling oil can be introduced into the inner cavity of the rotary shaft 21 closer to the rotor core 22 through the small oil pipe 7 to improve cooling efficiency.
In an embodiment, the rotor assembly 2 further includes a first rotor baffle 23 and a second rotor baffle 24, the first rotor baffle 23 is disposed at a first end of the rotor core 22 and sleeved on the rotating shaft 21, and the second rotor baffle 24 is disposed at a second end of the rotor core 22 and sleeved on the rotating shaft 21; the first rotor baffle 23 is provided with a first radial groove 231, the second rotor baffle 24 is provided with a second radial groove 241, the rotating shaft 21 is provided with a first via hole communicating the inner end of the first radial groove 231 with the inner cavity of the rotating shaft 21 and a second via hole communicating the inner end of the second radial groove 241 with the inner cavity of the rotating shaft 21, the outer end of the first radial groove 231 faces the first winding 12, and the outer end of the second radial groove 241 faces the second winding 13; the rotor core 22 is provided with a rotor circulation oil passage 221 communicating the first radial groove 231 and the second radial groove 241. As described above, the cooling oil flows through the stator core 11 (exchanges heat with each channel steel) by the rotor circulation oil passage 221 that makes a winding motion in the rotor core 22, thereby improving the cooling effect of the rotor core 22.
In an embodiment, the rotor circulation oil channel 221 is formed by sequentially communicating magnetic steel slots in the rotor core 22. Like this, the cooling oil is direct to the magnet steel cooling, simplifies the magnet steel cooling problem, can select the low grade magnet steel of temperature to reduce cost.
In an embodiment, the motor cooling structure further includes a housing and a second bearing 8 connected to the second end of the rotating shaft 21, the stator assembly 1 is installed in the housing, and a bearing cooling oil passage for providing cooling oil to the second bearing 8 is provided on the housing. The cooling oil thrown to the first winding 12 and the second winding 13 finally falls into the bottom of the housing.
In an embodiment, an oil groove 42 is formed in the end cover 4, the oil groove 42 is located in the second chamber Q2, a radially outer end of the oil groove 42 is communicated with the oil inlet chamber 41, and a radially inner end of the oil groove 42 extends to the first bearing 6.
The cooling principle of the above embodiment is as follows:
when the motor rotates, the cooling oil enters the oil pipe 3 through the oil pump, and is cooled in two paths, wherein one path enters the stator core groove 111 through the second oil outlet 33 of the oil pipe 3, and the other path enters the end cover 4 through the first oil outlet 32 of the oil pipe 3. The cooling oil entering the stator core slot 111 can cool the stator core 11 and the windings (the first winding 12 and the second winding 13) at the two ends of the stator core 11; the cooling oil entering the end cover 4 enters the oil inlet chamber 41 of the end cover 4 and then flows in two branches. One branch cools the first bearing 6 through the second chamber Q2, and the other branch flows into the inner cavity of the rotary shaft 21 through the first chamber Q1 to cool the rotor core 22.
The cooling method of rotor core 22 is specifically: the cooling oil entering the shaft cavity of the rotating shaft 21 enters the first radial groove 231 of the first rotor baffle 23 and the second radial groove 241 of the second rotor baffle 24 through the first via hole and the second via hole on the rotating shaft 21, and then enters the rotor circulating oil passage 221 through the first radial groove 231 and the second radial groove 241, so as to cool the rotor core 22 (magnetic steel). Finally, the cooling oil is thrown out from the outer ends of the first and second radial grooves 231 and 241 to cool the first and second windings 12 and 13, respectively.
The motor cooling structure of this application can cool off stator core 11, winding, rotor core 22 and first bearing 6 simultaneously, improves the motor cooling effect, improves motor performance and power density. Thus, the stator core 11 can be reduced in volume appropriately to reduce the cost.
In addition, the first winding 12 and the second winding 13 are cooled twice, so that the cooling effect of the first winding 12 and the second winding 13 is improved.
In addition, the embodiment of the invention also provides a motor, which comprises the motor cooling structure of the embodiment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A motor cooling structure is characterized by comprising a stator assembly, a rotor assembly, an oil pipe, an end cover, a cover plate and a first bearing, wherein the stator assembly comprises a stator core, the rotor assembly comprises a rotating shaft and a rotor core fixed on the rotating shaft, the stator core is arranged outside the rotor core, the end cover is arranged at the first end of the stator assembly, the end cover is connected to the rotating shaft through the first bearing, and the cover plate is connected to one side, away from the stator assembly, of the end cover;
the stator core is provided with a plurality of axially extending stator core grooves, the end cover is provided with an oil inlet cavity, a first cavity is formed between the end cover and the cover plate, a second cavity is formed between the stator component and the end cover, the radial outer end of the first cavity and the radial outer end of the second cavity are both communicated with the oil inlet cavity, the first bearing is positioned in the second cavity, and the radial inner end of the first cavity is communicated with the inner cavity of the rotating shaft;
the oil pipe is provided with an oil inlet, a first oil outlet and a second oil outlet, the oil inlet is connected with an oil pump, the first oil outlet is communicated with the oil inlet cavity, and the second oil outlet is communicated with the stator iron core groove.
2. The electric machine cooling structure according to claim 1, wherein the stator assembly further comprises a first winding, a second winding, a first stator oil baffle and a second stator oil baffle, the first winding is disposed at a first end of the stator core, the second winding is disposed at a second end of the stator core, the first stator oil baffle is disposed at the first end of the stator core and sleeved on the first winding, and the second stator oil baffle is disposed at the second end of the stator core and sleeved on the second winding;
a first stator oil cavity is formed between the first stator oil baffle plate and the first end of the stator core, a second stator oil cavity is formed between the second stator oil baffle plate and the second end of the stator core, and the stator core grooves are communicated with the first stator oil cavity and the second stator oil cavity to form a stator circulating oil way.
3. The motor cooling structure according to claim 2, wherein a first gap is formed between a radially inner side of the first stator oil baffle and a radially outer side of the first winding, a first passage that communicates the first gap with the first stator oil chamber is provided in the first stator oil baffle, and a part of the cooling oil in the first stator oil chamber is thrown toward the first winding through the first passage;
and a second gap is formed between the radial inner side of the second stator oil baffle plate and the radial outer side of the second winding, a second channel for communicating the second gap with the second stator oil cavity is arranged on the second stator oil baffle plate, and part of cooling oil in the second stator oil cavity is thrown to the second winding through the second channel.
4. The motor cooling structure according to claim 3, wherein the first stator oil baffle plate is provided with a plurality of first stoppers along a circumferential direction thereof to partition the first stator oil chamber into a plurality of first stator oil-distributing chambers, each of the first stator oil-distributing chambers corresponding to one of the first passages, each of the first stator oil-distributing chambers corresponding to two sets of the stator core grooves;
the second stator oil baffle plate is provided with a plurality of second baffle blocks along the circumferential direction of the second stator oil baffle plate so as to divide the second stator oil cavity into a plurality of second stator oil distribution cavities, each second stator oil distribution cavity corresponds to one second channel, the second oil outlet is communicated with one of the second stator oil distribution cavities, and each second stator oil distribution cavity corresponds to two groups of stator iron core grooves;
and cooling oil enters the second stator oil distributing cavity through the stator core slots and then respectively enters the two adjacent first stator oil distributing cavities through the two groups of stator core slots.
5. The electric machine cooling structure according to claim 1, further comprising a small oil pipe connected to the cover plate, the small oil pipe extending into the inner cavity of the rotating shaft, the small oil pipe being provided with a through hole communicating the radially inner end of the second chamber with the inner cavity of the rotating shaft.
6. The electric machine cooling structure according to claim 2, wherein the rotor assembly further comprises a first rotor baffle and a second rotor baffle, the first rotor baffle is disposed at a first end of the rotor core and sleeved on the rotating shaft, and the second rotor baffle is disposed at a second end of the rotor core and sleeved on the rotating shaft;
the first rotor baffle is provided with a first radial groove, the second rotor baffle is provided with a second radial groove, the rotating shaft is provided with a first through hole for communicating the inner end of the first radial groove with the inner cavity of the rotating shaft and a second through hole for communicating the inner end of the second radial groove with the inner cavity of the rotating shaft, the outer end of the first radial groove faces the first winding, and the outer end of the second radial groove faces the second winding;
and the rotor core is provided with a rotor circulating oil passage for communicating the first radial groove and the second radial groove.
7. The motor cooling structure according to claim 6, wherein the rotor circulation oil passage is formed by sequentially communicating magnetic steel grooves in the rotor core.
8. The electric machine cooling structure according to claim 1, further comprising a housing and a second bearing connected to a second end of the rotating shaft, wherein the stator assembly is installed in the housing, and the housing is provided with a bearing cooling oil passage for supplying cooling oil to the second bearing.
9. The electric motor cooling structure according to claim 1, wherein an oil groove is provided in the end cover, a radially outer end of the oil groove communicates with the oil inlet chamber, and a radially inner end of the oil groove extends to the first bearing.
10. An electric machine comprising the electric machine cooling structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333241.8A CN115133716A (en) | 2021-03-29 | 2021-03-29 | Motor cooling structure and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110333241.8A CN115133716A (en) | 2021-03-29 | 2021-03-29 | Motor cooling structure and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115133716A true CN115133716A (en) | 2022-09-30 |
Family
ID=83375358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110333241.8A Pending CN115133716A (en) | 2021-03-29 | 2021-03-29 | Motor cooling structure and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115133716A (en) |
-
2021
- 2021-03-29 CN CN202110333241.8A patent/CN115133716A/en active Pending
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