CN110429727B - Wheel hub motor stator water-cooling structure for electric automobile - Google Patents
Wheel hub motor stator water-cooling structure for electric automobile Download PDFInfo
- Publication number
- CN110429727B CN110429727B CN201910700541.8A CN201910700541A CN110429727B CN 110429727 B CN110429727 B CN 110429727B CN 201910700541 A CN201910700541 A CN 201910700541A CN 110429727 B CN110429727 B CN 110429727B
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- water
- channel
- cooling
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- motor stator
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- 238000001816 cooling Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000000498 cooling water Substances 0.000 claims abstract description 33
- 239000000110 cooling liquid Substances 0.000 claims abstract description 14
- 239000002826 coolant Substances 0.000 abstract description 5
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 108091006146 Channels Proteins 0.000 abstract 5
- 102000010637 Aquaporins Human genes 0.000 abstract 4
- 108010063290 Aquaporins Proteins 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
-
- 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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a water cooling structure of a hub motor stator for an electric automobile, which realizes water cooling heat dissipation of a motor by arranging a cooling water path structure on the motor stator on the basis of keeping the original structure of the motor. The water-cooling structure is including arranging in the coolant liquid inlet channel, water outlet channel, the water inlet ring way and the water outlet ring way of motor stator axle to and arrange in the cold water course, hot water course, cooling water course, arc wall and the arc capping of motor stator yoke portion. The cooling liquid flows in from the water inlet channel, flows through the cold water channel, the cooling water channel and the hot water channel in sequence after being divided by the water inlet loop channel, then flows through the water outlet loop channel to converge, and finally flows out from the water outlet channel. The water cooling structure provided by the invention is provided with a plurality of groups of cooling circulation branches which are uniformly distributed, and the temperature control valve is designed for adjusting the flow of each cooling liquid circulation branch, so that the cooling is more uniform, the temperature gradient of the motor is avoided, the cooling effect is better, the volume of the motor is reduced, and the requirement of light weight of an automobile is met.
Description
Technical Field
The invention belongs to the technical field of hub motor manufacturing, relates to a cooling structure of a hub motor, and particularly relates to a water cooling structure of a hub motor stator for an electric automobile.
Background
Energy and environment are two important topics of the current social development, and the electric automobile is produced under the development background of energy shortage and environmental pollution. The distributed wheel hub motor driving mode is adopted, the independent electric wheel structure enables the steer-by-wire and the all-wheel steering to be easier to realize, the steering radius of the vehicle can be effectively reduced, the vehicle has more excellent maneuverability and flexibility, and compared with a mechanical steering mechanism, the steering performance of the vehicle is greatly improved. The application of the hub motor needs to overcome the severe working environment, wherein the temperature rise problem of the motor is a main problem influencing the working state of the motor. The aging of the insulating material in the motor can be accelerated by the excessive temperature, the irreversible demagnetization phenomenon of the permanent magnet material can be generated, and the service life of the motor can be greatly shortened by the high-temperature environment.
The traditional air cooling mode can not meet the heat dissipation requirement of the hub motor under high speed and high load, the mode of adding the cooling fins and the independent fan can increase the volume of the motor, increase the reactive loss and noise, and cause difficult dynamic balance (or static balance), complex process and increased cost. For the hub motor, due to the compact structure and the small in-wheel space, a reasonable cooling mode is very important.
Water cooling is an effective method for solving the temperature rise problem at present, the heat dissipation efficiency is high, and reasonable cooling pipeline arrangement can be realized under the condition that the original structure of the motor is reserved, so that the compact structure of the motor is ensured. The cooling mechanism is arranged in the motor inner stator structure, so that the dynamic balance of the motor is not influenced.
Disclosure of Invention
Therefore, the invention provides the water cooling structure of the in-wheel motor stator for the electric automobile, which can effectively solve the problem of motor temperature rise by paving the cooling liquid pipeline in the motor inner stator on the premise of keeping the original structure of the motor, has simple structure and lower manufacturing cost, can ensure the structural compactness of the motor, and does not influence the dynamic balance effect of the motor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a water cooling structure of a hub motor stator for an electric automobile comprises a cooling liquid water inlet channel, a water outlet channel, a water inlet ring channel and a water outlet ring channel which are arranged on a motor stator shaft, and a cold water channel, a hot water channel, a cooling water channel, an arc-shaped groove and an arc-shaped groove cover which are arranged on a yoke part of the motor stator; the water inlet loop and the cold water channel are on the same plane and are positioned on one side far away from the extending direction of the stator shaft, and the water inlet loop is respectively connected with the water inlet channel and the cold water channel; the water outlet loop and the hot water channel are in the same plane and are located on one side close to the extending direction of the stator shaft, the water outlet loop is an arc water channel and is respectively connected with the water outlet channel and the hot water channel, the hot water channel is also communicated with a cooling water channel, the cooling water channel is connected through an arc groove, and the arc groove is matched with the arc groove cover.
In the above scheme, a temperature control valve is installed at the junction of the cooling water channel and the hot water channel.
In the above scheme, the temperature control valve comprises a shell, wherein one end of the shell is fixed with a flow adjusting bolt, and the other end of the shell is provided with a water inlet which is communicated with a cooling water channel; the flow adjusting bolt applies pretightening force to one end of the valve core through a spring, and the other end of the valve core applies adjusting force through a thermosensitive element and a spring II; the shell is provided with a water outlet, and the water outlet is aligned and communicated with the hot water channel.
In the above aspect, the cooling water channel is preferably a circular through hole structure.
In the above scheme, the arc-shaped grooves comprise three hole arc-shaped grooves, two hole arc-shaped grooves and a single hole circular groove, and the distribution of the single hole circular groove, the two hole arc-shaped grooves and the three hole arc-shaped grooves at the yoke part of the stator enables the cooling water channel to form a circulating closed loop.
In the above scheme, the arc slot cover comprises a three-hole arc slot cover, a two-hole arc slot cover and a single-hole circular slot cover, and the three-hole arc slot, the two-hole arc slot and the single-hole circular slot are respectively matched.
In the above scheme, the cold water channel and the hot water channel are provided with a plurality of channels, the number of the channels is equal to the number of the channels, and the cold water channel and the hot water channel are arranged at intervals.
The invention provides a wheel hub motor stator water cooling structure for an electric automobile, which has the following beneficial effects:
1. according to the wheel hub motor stator water cooling structure for the electric automobile, the cooling water channel is of the through hole structure, the process is simple, and the manufacturing cost is low.
2. The invention provides a water cooling structure of a hub motor stator for an electric automobile, which is provided with a plurality of groups of cooling circulating water channels which are uniformly distributed, can accelerate the circulation speed of cooling liquid, optimize a cooling liquid circulation path and has better cooling effect.
3. According to the wheel hub motor stator water cooling structure for the electric automobile, the flow of each cooling liquid circulation branch is adjusted through the temperature control valve, so that cooling is more uniform, and the temperature gradient of the motor is avoided.
4. According to the wheel hub motor stator water cooling structure for the electric automobile, the cooling water channel is processed on the basis of the original structure of the motor, the structure is simple, and the size of the motor does not need to be increased.
Drawings
FIG. 1 is a schematic view of a cooling water circuit according to the present invention;
FIG. 2 is a cross-sectional view of the cooling zone in circular section;
FIG. 3 is a schematic perspective view of the present invention;
FIG. 4 is a schematic view of an arc-shaped slot cover;
FIG. 5 is a schematic view of a thermostat valve;
in the figure: 1. a water outlet channel; 2. a cold water channel; 3. a cooling water channel; 4. an arc-shaped slot; 5. a hot water channel; 6. a stator shaft; 7. a winding slot; 8. a water inlet channel; 9. a water inlet loop; 10. a water outlet loop; 11. a single-hole circular groove; 12. two hole arc grooves; 13. a three-hole arc slot; 14. a single-hole circular groove cover; 15. two-hole arc-shaped groove covers; 16. a three-hole arc-shaped slot cover; 17. a temperature control valve; 18. a flow regulating bolt; 19. a water outlet of the temperature control valve; 20. a valve core; 21. a thermosensitive element; 22. a water inlet of a temperature control valve; 23. a first spring; 24. a shaft sleeve; 25. a second spring; 26. and (4) a bracket.
Detailed Description
The invention will be further explained with reference to the drawings, but the scope of protection of the invention is not limited thereto.
Referring to fig. 1 and 3, the hub motor stator water cooling structure for the electric automobile provided by the invention is an external rotor motor, and comprises a cooling liquid inlet channel 8, a water outlet channel 1, a water inlet ring channel 9 and a water outlet ring channel 10 which are arranged on a motor stator shaft 6, and a cold water channel 2, a hot water channel 5, a cooling water channel 3, an arc-shaped groove 4 and an arc-shaped groove cover which are arranged on a motor stator yoke part, wherein the cold water channel 2 and the hot water channel 5 are axially arranged on the motor stator yoke part at intervals. The water inlet loop 9 and the cold water channel 2 are in the same plane and are positioned on one side far away from the extending direction of the stator shaft 6; the water outlet loop 10 and the hot water channel 5 are on the same plane and are positioned at one side close to the extending direction of the stator shaft 6; the water inlet loop 9 is an annular water channel and is respectively connected with the water inlet channel 8 and the cold water channel 2, the cold water channel 2 is also communicated with the cooling water channel 3, and cooling liquid with lower temperature is conveyed to the cooling area; the number of the cold water channels 2 and the number of the hot water channels 5 are equal, and the cold water channels 2 and the hot water channels 5 are arranged at intervals; the water outlet loop 10 is an arc water channel (the angle of the arc is 240 ° in this embodiment, and the gap is used for the water inlet channel to pass through), and is respectively connected with the water outlet channel 1 and the hot water channel 5, and the hot water channel 5 is also communicated with the cooling water channel 3, and conveys the cooling liquid with higher temperature flowing through the cooling area back to the water outlet channel 1. In the scheme, the cooling liquid flows in from the water inlet channel 8, flows through the water inlet loop 9 after being divided, flows through the cold water channel 2, the cooling water channel 3 and the hot water channel 5 in sequence, then flows together through the water outlet loop 10, and finally flows out from the water outlet channel 1.
Referring to fig. 2 and 4, in the scheme, a plurality of cooling water channels 3 are axially distributed on the outer circle of a yoke part of a motor stator and are of a circular through hole structure, and pore channels are connected through arc-shaped grooves 4; the arc-shaped grooves 4 comprise three-hole arc-shaped grooves 13, two-hole arc-shaped grooves 12 and a single-hole circular groove 11, and are respectively matched with a three-hole arc-shaped groove cover 16, a two-hole arc-shaped groove cover 15 and a single-hole circular groove cover 14 to form a water channel; the distribution of the single-hole circular slot 11, the two-hole arc-shaped slot 12 and the three-hole arc-shaped slot 13 on the yoke part of the stator enables the cooling water channel 3 to form a circulating closed loop. In fig. 2 and 4, the distribution mode of the single-hole circular slot 1, the two-hole arc-shaped slot 12 and the three-hole arc-shaped slot 13 is as follows: the single-hole circular groove 1, the two-hole arc-shaped groove 12, the three-hole arc-shaped groove 13 and the two-hole arc-shaped groove 12 are circulated in sequence. The cooling water channel 3, the arc-shaped groove 4 and the arc-shaped groove cover (the three-hole arc-shaped groove cover 16, the two-hole arc-shaped groove cover 15 and the single-hole circular groove cover 14) form an arch-shaped circulating water channel. In the scheme, cooling liquid flows in from the cold water channel 2 and is divided into the cooling water channels 3 on two sides; the cooling liquid in the cooling water channels 3 at two sides of each hot water channel 5 is converged back to the hot water channels 5. The number, size and cross-sectional shape (ellipse, square, polygon, etc.) of the cooling water channels 3 can be adjusted according to the size of the motor stator.
Referring to fig. 2 and 5, in the above scheme, a temperature control valve 17 is installed at a junction of the cooling water channel 3 and the hot water channel 5, the temperature control valve 17 includes a temperature control valve housing, a flow adjusting bolt 18, a temperature control valve water outlet 19, a valve core 20, a thermal element 21, and a temperature control valve water inlet 22, the flow adjusting bolt 18 is fixed at one end of the temperature control valve housing, the other end of the temperature control valve housing is provided with the water inlet 22, the flow adjusting bolt 18 applies a pre-tightening force to one end of the valve core 20 through a spring one 23, the other end of the valve core 20 contacts with one end of the thermal element 21, the other end of the thermal element 21 is positioned through a shaft sleeve 24, a spring two 25 is arranged between the other end of the thermal element 21 and the tail end of the shaft sleeve. The temperature control valve water outlet 19 arranged on the shell 22 is aligned with and communicated with the hot water channel 5, and the temperature control valve water inlet 22 is communicated with the cooling water channel 3. In the above scheme, the coolant flows into the temperature control valve water inlet 22 through the coolant channel 3, flows through the temperature control valve end 17 and flows out to the hot water channel 5 from the temperature control valve water outlet 19, and the thermal element 21 generates telescopic change along with the coolant temperature based on the principle of thermal expansion and cold contraction to adjust the pretightening force of the valve core 20, so that the flow of the temperature control valve 17 is adjusted, and the purpose of automatically balancing the coolant temperature is achieved. The invention can ensure that the heat dissipation of the hub motor is more uniform, and avoids the temperature gradient in the axial direction, thereby improving the heat dissipation efficiency and effectively solving the problem of the temperature rise of the motor.
The foregoing description is only for the purpose of promoting an understanding of the principles of the invention and its core concepts, and it will be understood that various modifications and adaptations of the invention may occur to those skilled in the art without departing from the principles of the invention and are intended to be included within the scope of the invention.
Claims (7)
1. A water cooling structure of a hub motor stator for an electric automobile is characterized by comprising a cooling liquid inlet channel (8), a water outlet channel (1), a water inlet ring channel (9) and a water outlet ring channel (10) which are arranged on a motor stator shaft (6), and a cold water channel (2), a hot water channel (5), a cooling water channel (3), an arc-shaped groove (4) and an arc-shaped groove cover which are arranged on a yoke part of a motor stator; the water inlet loop (9) and the cold water channel (2) are on the same plane and are positioned on one side far away from the extending direction of the stator shaft (6), and the water inlet loop (9) is respectively connected with the water inlet channel (8) and the cold water channel (2); go out water ring way (10) and hot water way (5) in the coplanar, and be located the one side that is close to stator shaft (6) direction of stretching out, go out water ring way (10) and be the circular arc water course, connect out water way (1) and hot water way (5) respectively, hot water course (5) still communicate cooling water course (3), cooling water course (3) are connected through arc wall (4), arc wall (4) and arc capping cooperation.
2. The in-wheel motor stator water cooling structure for the electric automobile according to claim 1, characterized in that a temperature control valve (17) is installed at a junction of the cooling water channel (3) and the hot water channel (5).
3. The in-wheel motor stator water cooling structure for the electric automobile is characterized in that the temperature control valve (17) comprises a shell, a flow adjusting bolt (18) is fixed at one end of the shell, a water inlet (22) is formed in the other end of the shell, and the water inlet (22) is communicated with the cooling water channel (3); the flow rate adjusting bolt (18) applies pretightening force to one end of the valve core (20) through a first spring (23), and the other end of the valve core (20) applies adjusting force through a second spring (25) by a thermosensitive element (21); a water outlet (19) is arranged on the shell, and the water outlet (19) is aligned and communicated with the hot water channel (5).
4. The in-wheel motor stator water-cooling structure for the electric automobile is characterized in that the cooling water channel (3) is of a circular through hole structure.
5. The in-wheel motor stator water cooling structure for the electric automobile according to claim 1, characterized in that the arc-shaped grooves (4) comprise three-hole arc-shaped grooves (13), two-hole arc-shaped grooves (12) and a single-hole circular groove (11), and the distribution of the single-hole circular groove (11), the two-hole arc-shaped grooves (12) and the three-hole arc-shaped grooves (13) in the yoke part of the stator enables the cooling water channel (3) to form a circulating closed loop.
6. The in-wheel motor stator water cooling structure for the electric automobile according to claim 1 or 5, characterized in that the arc-shaped slot cover comprises a three-hole arc-shaped slot cover (16), a two-hole arc-shaped slot cover (15) and a single-hole circular slot cover (14) which are respectively matched with a three-hole arc-shaped slot (13), a two-hole arc-shaped slot (12) and a single-hole circular slot (11).
7. The in-wheel motor stator water cooling structure for the electric automobile according to claim 1, wherein the number of the cold water channel (2) and the number of the hot water channel (5) are equal, and the cold water channel (2) and the hot water channel (5) are arranged at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700541.8A CN110429727B (en) | 2019-07-31 | 2019-07-31 | Wheel hub motor stator water-cooling structure for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910700541.8A CN110429727B (en) | 2019-07-31 | 2019-07-31 | Wheel hub motor stator water-cooling structure for electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110429727A CN110429727A (en) | 2019-11-08 |
| CN110429727B true CN110429727B (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910700541.8A Expired - Fee Related CN110429727B (en) | 2019-07-31 | 2019-07-31 | Wheel hub motor stator water-cooling structure for electric automobile |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181284B (en) * | 2020-01-13 | 2022-03-29 | 合肥骐骥电驱动技术有限公司 | Disc type hub driving motor |
| US12040690B2 (en) * | 2020-08-31 | 2024-07-16 | General Electric Company | Cooling a stator housing of an electric machine |
| CN112311126B (en) * | 2020-09-21 | 2021-10-08 | 江苏大学 | Motor cooling structure |
| CN113014040A (en) * | 2021-03-30 | 2021-06-22 | 哈尔滨理工大学 | Water-cooling structure of axial segmented inner stator of outer rotor hub motor |
| CN115276323B (en) * | 2022-09-27 | 2022-12-30 | 长沙长利电气有限公司 | Single-bearing water-cooling hub motor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3559891B2 (en) * | 1998-06-22 | 2004-09-02 | 日産自動車株式会社 | Cooling structure of multilayer motor |
| CN201904687U (en) * | 2010-02-02 | 2011-07-20 | 株洲南车时代电气股份有限公司 | Generator integrally connected with engine |
| DE102013202592A1 (en) * | 2013-02-19 | 2014-08-21 | Schaeffler Technologies Gmbh & Co. Kg | Wheel hub motor e.g. synchronous reluctance motor, for two or three-wheeled vehicle, has fan portion rotatably coupled in rotation direction around main rotational axis with rotor for generating airflow for refrigeration of hub motor |
| CN105610254B (en) * | 2016-01-07 | 2018-04-13 | 冯辉恒 | A kind of oil cooling wheel hub motor |
| CN205356067U (en) * | 2016-01-25 | 2016-06-29 | 阮送良 | Water -cooling electric motor car wheel hub motor |
| CN205753855U (en) * | 2016-06-17 | 2016-11-30 | 任丘市强东电机有限公司 | Hub drive device |
| CN206323258U (en) * | 2016-12-12 | 2017-07-11 | 无锡***电机科技有限公司 | Water-cooled wheel hub motor |
| CN208272797U (en) * | 2018-05-03 | 2018-12-21 | 包头天工电机有限公司 | The cold wheel hub permanent magnet synchronous motor of oil |
| CN108599411A (en) * | 2018-07-19 | 2018-09-28 | 扬州大学 | A kind of stator water-cooling structure of wheel hub motor |
| CN208707474U (en) * | 2018-08-03 | 2019-04-05 | 任丘市强东电机有限公司 | A kind of water cooling hub motor |
| CN110022035A (en) * | 2019-04-03 | 2019-07-16 | 贵州航天林泉电机有限公司 | A kind of outer rotor hub motor cooling structure of stator |
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- 2019-07-31 CN CN201910700541.8A patent/CN110429727B/en not_active Expired - Fee Related
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