CN216086406U - Motor rotor cooling system of electric drive assembly - Google Patents
Motor rotor cooling system of electric drive assembly Download PDFInfo
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- CN216086406U CN216086406U CN202120409855.5U CN202120409855U CN216086406U CN 216086406 U CN216086406 U CN 216086406U CN 202120409855 U CN202120409855 U CN 202120409855U CN 216086406 U CN216086406 U CN 216086406U
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- oil duct
- motor rotor
- speed changer
- drive assembly
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- 238000001816 cooling Methods 0.000 title claims abstract description 37
- 238000007789 sealing Methods 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 21
- 230000017525 heat dissipation Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 101150006573 PAN1 gene Proteins 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 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
- 239000012466 permeate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of cooling of an electric drive assembly of a new energy automobile, in particular to a motor rotor cooling system of the electric drive assembly, which is mainly used for improving the cooling efficiency of a motor rotor. The utility model comprises an oil pump, a motor rotor, a speed changer and an oil pan, wherein an oil suction port of the oil pump is immersed in the oil pan, an oil outlet of the oil pump is hermetically connected with one end of the speed changer, and the utility model is characterized in that: a first oil duct is arranged in the speed changer, a second oil duct is arranged in the motor rotor, and the speed changer is placed in the motor rotor so that the first oil duct is communicated with the second oil duct; a third oil duct is arranged on the shell of the speed changer, and two ends of the third oil duct are respectively communicated with the second oil duct and the oil pan; still be equipped with the fourth oil duct in the motor rotor casing, the fourth oil duct along the circumference setting of second oil duct, and with the second oil duct intercommunication. The utility model improves the cooling efficiency of the motor rotor.
Description
Technical Field
The utility model relates to the technical field of cooling of an electric drive assembly of a new energy automobile, in particular to a motor rotor cooling system of the electric drive assembly, which is mainly used for improving the cooling efficiency of a motor rotor.
Background
The motor rotor can generate heat in the working process, and the heat can influence the service life of the motor rotor and even influence the whole working process. In order to ensure the service life of the motor rotor, the heat dissipation of the motor rotor is indispensable, and research is also carried out on how to improve the heat dissipation efficiency. The patent with publication number CN107659017A provides a be used for electric motor rotor cooling structure, include with the pivot one end fixed connection of rotor, be located the derailleur gear of derailleur casing, the hollow chamber of gear and the hollow chamber of axle that the derailleur gear meets with the pivot center punishment do not is equipped with each other and puts through, and the one end that derailleur gear and pivot meet is equipped with the backward flow hole, and the hollow chamber of gear other end switch-on oil pump of derailleur gear, oil pump and backward flow hole switch-on the inside liquid oil of derailleur respectively. Through forming the cooling circuit that goes to the hollow chamber of gear, the hollow chamber of axle, backward flow hole in proper order by the oil pump, returns the oil pump again, but only go on through the hollow chamber of axle to the cooling of electric motor rotor, cooling area is less, and cooling efficiency is lower.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a motor rotor cooling system of an electric drive assembly, which is mainly used for improving the cooling efficiency of a motor rotor.
In order to solve the technical problem, the application provides an electric motor rotor cooling system of electric drive assembly, including oil pump, electric motor rotor, variable-speed motor, oil pan, the oil absorption mouth submergence of oil pump is in the oil pan, the oil-out of oil pump with variable-speed motor one end sealing connection, its characterized in that: a first oil duct is arranged in the speed changer, a second oil duct is arranged in the motor rotor, and the speed changer is placed in the motor rotor so that the first oil duct is communicated with the second oil duct; a third oil duct is arranged on the shell of the speed changer, and two ends of the third oil duct are respectively communicated with the second oil duct and the oil pan; still be equipped with the fourth oil duct in the motor rotor casing, the fourth oil duct along the circumference setting of second oil duct, and with the second oil duct intercommunication.
Preferably, an outer wall of the transmission is hermetically connected to an inner wall of the motor rotor.
Preferably, a sealing ring is arranged at the joint of the outer wall of the tail end of the speed changer arranged in the motor rotor and the inner wall of the motor rotor.
Preferably, a groove is reserved on the outer wall of the speed changer, and a third oil channel is formed between the groove and the inner wall of the motor rotor.
Preferably, the outer wall of the transmission is splined to the inner wall of the motor rotor.
Preferably, the third oil passage is provided in the transmission case to form a passage through which oil flows.
Preferably, a one-way sheet is arranged at the joint of the first oil channel and the second oil channel, the one-way sheet is perpendicular to the first oil channel, and the one-way sheet is connected with the upper end of the end face of the transmission housing.
Preferably, the area of the check piece is larger than the area of the first oil passage and smaller than the area of the second oil passage.
Preferably, the one-way plate is connected to the transmission by a hinge structure.
Preferably, the fourth oil passage is provided in plurality along the circumferential direction of the cross section of the second oil passage or is spirally provided in one along the periphery of the second oil passage.
The utility model has the following technical effects:
1. the oil fluid returns the oil pan again after flowing through oil pump, first oil duct in the speed changer, the second oil duct in the electric motor rotor in the speed changer casing in proper order from the oil pan, forms endless cooling circuit, can be at the continuous heat transfer of electric motor rotor working process, extension electric motor rotor's life except that, further increase the cooling area to electric motor rotor in the mode that sets up the fourth oil duct in electric motor rotor casing, improved cooling efficiency.
2. Sealing connection between the outer wall of variable-speed motor and electric motor rotor's inner wall for between fluid in the second oil duct can not permeate variable-speed motor and the electric motor rotor, prevent that fluid from causing the loss.
3. The third oil duct arranged on the speed changer shell can be arranged in different modes, if the outer wall of the speed changer is in sealing connection with the inner wall of the motor rotor, a groove can be directly reserved on the outer wall of the speed changer, and the third oil duct is directly formed between the groove and the inner wall of the motor rotor, so that the design is simpler in manufacturing; in addition, the third oil channel can be directly arranged in the shell of the speed changer, so that the manufacturing is more complicated, and the operation of sealing between the outer wall of the speed changer and the inner wall of the motor rotor is reduced.
4. The connection mode of the spline connection between the outer wall of the speed changer and the inner wall of the motor rotor is convenient for the electronic rotor to transmit kinetic energy to the speed changer.
5. Based on the structure that the gear change machine is directly put into electric motor rotor for fluid contact in gear change machine casing one end terminal surface and the second oil duct sets up the one-way piece between first oil duct and second oil duct, and the area that sets up the one-way piece is greater than the area of first oil duct, is less than the area of second oil duct, makes fluid can only follow first oil duct and flow into the second oil duct, and can not follow the first oil duct of second oil duct inflow, prevents that fluid from taking place the condition of backward flow.
6. The one-way piece and the variable-speed motor are connected in a hinge mode, so that oil in the first oil duct can impact the one-way piece conveniently, an opening is formed between the one-way piece and the end face of the variable-speed motor, the oil smoothly flows into the second oil duct, and when the oil in the second oil duct flows to the first oil duct, the oil impacts the one-way piece to be tightly attached to the end face of the variable-speed motor, and the oil is prevented from entering the first oil duct.
7. A plurality of fourth oil ducts are axially arranged along the cross section of the second oil duct or a fourth oil duct is spirally arranged on the periphery of the second oil duct, so that the cooling area of the oil to the motor rotor is greatly increased, and the heat dissipation efficiency is improved.
Drawings
FIG. 1 is a schematic view of the principle
FIG. 2 is a schematic view of a cooling cycle
Wherein, 1-oil pan; 2-an oil pump; 3-a transmission; 3-1-a first oil passage; 3-2-a third oil passage; 4-a motor rotor; 4-1-a second oil passage; 4-2-a fourth oil passage; 5-unidirectional sheet.
Detailed Description
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that the conventional terms should be interpreted as having a meaning that is consistent with their meaning in the relevant art and this disclosure. The present disclosure is to be considered as an example of the utility model and is not intended to limit the utility model to the particular embodiments.
The present embodiment provides a motor rotor 4 cooling system of an electric drive assembly, which is mainly used to improve the cooling efficiency of the motor rotor 4. This system includes oil pump 2, electric motor rotor 4, variable-speed motor 3, oil pan 1, and the oil absorption mouth submergence of oil pump 2 is in oil pan 1, the oil-out of oil pump 2 and 3 one end sealing connection of variable-speed motor, its characterized in that: a first oil duct 3-1 is arranged in the speed changer 3, a second oil duct 4-1 is arranged in the motor rotor 4, and the speed changer 3 is arranged in the motor rotor 4 so that the first oil duct 3-1 is communicated with the second oil duct 4-1; a third oil duct 3-2 is arranged on a shell of the speed changer 3, and two ends of the third oil duct 3-2 are respectively communicated with a second oil duct 4-1 and an oil sump 1; a fourth oil duct 4-2 is further arranged in the housing of the motor rotor 4, and the fourth oil duct 4-2 is arranged along the circumferential direction of the second oil duct 4-1 and is communicated with the second oil duct 4-1.
Compared with the mode of adopting an external cooling liquid loop, the cooling loop of the motor rotor 4 system is formed by utilizing the internal structure of the electric drive assembly, so that the occupied space is reduced, and the installation in an automobile is facilitated. In this embodiment, as shown in fig. 1, an oil suction port of the oil pump 2 is immersed in the oil pan 1, and oil cooled from the west region in the oil pan 1 further flows into the first oil passage 3-1 in the transmission 3 from an oil outlet of the oil pump 2, wherein the oil outlet is hermetically connected to the transmission 3, so as to prevent oil leakage from occurring between the oil outlet of the oil pump 2 and the transmission 3, which results in waste of oil. The oil liquid flows into the second oil duct 4-1 in the motor rotor 4 through the first oil duct 3-1, flows into the third oil duct 3-2 through the oil outlet of the second oil duct 4-1, the third oil duct 3-2 is directly communicated with the oil pan 1 to form circulation of cooling oil liquid, and cyclic heat dissipation of the motor rotor 4 is achieved.
In this embodiment, the outer wall of the transmission 3 and the inner wall of the motor rotor 4 are hermetically connected. The sealing connection enables oil in the second oil duct 4-1 in the motor rotor 4 not to enter between the outer wall of the speed changer 3 and the inner wall of the motor rotor 4, backflow is not caused, loss of the oil is prevented, cooling efficiency is guaranteed, and meanwhile the motor rotor 4 is guaranteed to transmit power to the speed changer 3. In the embodiment, a groove is reserved on the outer wall of the speed changer 3, and a third oil passage 3-2 is formed between the groove and the inner wall of the motor rotor 4. And other outer walls except the groove opening on the speed changer 3 are tightly attached to the inner wall of the motor rotor 4, and sealing structures can be arranged on two sides of a notch forming the third oil duct 3-2 in order to prevent oil from permeating into the attachment area of the outer wall of the speed changer 3 and the inner wall of the motor rotor 4 from the third oil duct 3-2. Besides the sealing connection, the outer wall of the speed changer 3 is in spline connection with the inner wall of the motor rotor 4. The spline connection structure is more effective in power transmission, and certainly, in order to ensure that the oil in the second oil duct 4-1 does not flow into the space between the outer wall of the speed changer 3 and the inner wall of the motor rotor 4, a sealing ring is arranged between the outer wall of the speed changer and the inner wall of the motor rotor. The third oil duct 3-2 is arranged inside the transmission housing to form a passage through which oil flows. A circumferentially closed passage is formed which does not require further sealing, other than the form in which the groove is formed in the transmission 3, only at the inlet and outlet of the third oil passage 3-2. In this embodiment, a sealing ring is disposed at a joint between an outer wall of the tail end of the transmission 3 disposed in the motor rotor 4 and an inner wall of the motor rotor 4. The oil is prevented from permeating into a gap between the outer wall of the speed changer 3 and the inner wall of the motor rotor 4 from the second oil duct 4-1 in a sealing ring mode.
In this embodiment, a one-way plate 5 is provided at the joint of the first oil passage 3-1 and the second oil passage 4-1, the one-way plate 5 is perpendicular to the first oil passage 3-1, and the one-way plate 5 is connected to the upper end of the end surface of the casing of the transmission 3. Since the transmission 3 is disposed inside the motor rotor 4 such that the end surface of the casing of the transmission 3 contacting the second oil passage 4-1 contacts the second oil passage 4-1, i.e., the outside diameter of the casing of the transmission 3 is the same as the diameter of the second oil passage 4-1, the one-way plate 5 is provided on the casing end surface of the transmission 3 for the convenience of design, and is connected at its upper end to the transmission casing end surface. In addition, the area of the check sheet 5 is larger than the area of the first oil passage 3-1 and smaller than the area of the second oil passage 4-1. So that the one-way flap 5 does not enter the first oil channel 3-1 but can move correspondingly in the second oil channel 4-1, while the one-way flap 5 does not block the oil inlet of the third oil channel 3-2. In this embodiment, the one-way plate 5 is connected to the transmission 3 by a hinge structure. The lower end of the one-way sheet 5 can move in the second oil duct 4-1, when oil in the first oil duct 3-1 impacts the one-way sheet, the lower end of the one-way sheet 5 is in an opening form, so that the oil enters the second oil duct 4-1, and if the oil in the second oil duct 4-1 flows reversely to the first oil duct 3-1, the lower end of the one-way sheet 5 is tightly attached to and closed on the tail end face of the speed changer 3, so that the oil is prevented from entering the first oil duct 3-1, and the risk of backflow of the oil is avoided.
Since the loop form has a small heat dissipation area for the motor rotor 4, in order to further improve the heat dissipation efficiency, in this embodiment, on the basis of the loop, a fourth oil passage 4-2 is provided in the housing of the motor rotor 4, as shown in fig. 2, the fourth oil passage 4-2 is provided in a plurality of circumferential directions along the cross section of the second oil passage 4-1 or one spiral direction along the periphery of the second oil passage 4-1. When a plurality of fourth oil ducts 4-2 are circumferentially arranged along the cross section of the second oil duct 4-1, an inlet and an outlet of each fourth oil duct 4-2 are communicated with the second oil duct 4-1, and oil enters the inlet of the fourth oil duct 4-2 from the second oil duct 4-1, passes through the fourth oil duct 4-2, and then flows into the second oil duct 4-1 from the outlet. The fourth oil ducts 4-2 can be uniformly distributed, and uniform heat dissipation of all parts of the motor rotor 4 is facilitated. When the only fourth oil passage 4-2 is designed in a spiral form along the circumferential outer wall of the second oil passage 4-1 (i.e., along the circumference of the second oil passage 4-1 in the motor rotor 4 casing), the inlet and the outlet of the fourth oil passage 4-2 are both in the second oil passage 4-1, which makes the solid construction area of the motor rotor 4 smaller and reduces the material consumption compared with the first heat dissipation area.
Although embodiments of the present invention have been described, various changes or modifications may be made by one of ordinary skill in the art within the scope of the appended claims.
Claims (10)
1. The utility model provides an electric motor rotor cooling system of electric drive assembly, includes oil pump, electric motor rotor, variable-speed motor, oil pan, the oil absorption mouth submergence of oil pump is in the oil pan, the oil-out of oil pump with variable-speed motor one end sealing connection, its characterized in that:
a first oil duct is arranged in the speed changer, a second oil duct is arranged in the motor rotor, and the speed changer is placed in the motor rotor so that the first oil duct is communicated with the second oil duct;
a third oil duct is arranged on the shell of the speed changer, and two ends of the third oil duct are respectively communicated with the second oil duct and the oil pan;
still be equipped with the fourth oil duct in the motor rotor casing, the fourth oil duct along the circumference setting of second oil duct, and with the second oil duct intercommunication.
2. The electric machine rotor cooling system of an electric drive assembly of claim 1, wherein:
the outer wall of the speed changer is hermetically connected with the inner wall of the motor rotor.
3. The electric machine rotor cooling system of an electric drive assembly of claim 2, wherein:
and a sealing ring is arranged at the joint of the outer wall of the tail end of the variable speed motor arranged in the motor rotor and the inner wall of the motor rotor.
4. The electric machine rotor cooling system of an electric drive assembly of claim 2, wherein:
a groove is reserved on the outer wall of the speed changer, and a third oil duct is formed between the groove and the inner wall of the motor rotor.
5. The electric machine rotor cooling system of an electric drive assembly of claim 1, wherein:
and the outer wall of the speed changer is in splined connection with the inner wall of the motor rotor.
6. An electric motor rotor cooling system for an electric drive assembly according to any one of claims 2-5, wherein:
the third oil duct is arranged in the speed changer shell to form a channel for oil to flow through.
7. The electric machine rotor cooling system of an electric drive assembly of claim 1, wherein:
and a one-way sheet is arranged at the joint of the first oil duct and the second oil duct, is perpendicular to the first oil duct and is connected with the upper end of the end surface of the speed changer shell.
8. The electric machine rotor cooling system of an electric drive assembly of claim 7, wherein:
the area of the one-way sheet is larger than that of the first oil duct and smaller than that of the second oil duct.
9. The electric motor rotor cooling system of an electric drive assembly of claim 8, wherein:
the unidirectional sheet is connected with the speed changer by adopting a hinge structure.
10. The electric machine rotor cooling system of an electric drive assembly of claim 1, wherein:
the fourth oil channel is arranged along the circumferential direction of the cross section of the second oil channel or spirally arranged along the periphery of the second oil channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120409855.5U CN216086406U (en) | 2021-02-25 | 2021-02-25 | Motor rotor cooling system of electric drive assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120409855.5U CN216086406U (en) | 2021-02-25 | 2021-02-25 | Motor rotor cooling system of electric drive assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216086406U true CN216086406U (en) | 2022-03-18 |
Family
ID=80634625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120409855.5U Active CN216086406U (en) | 2021-02-25 | 2021-02-25 | Motor rotor cooling system of electric drive assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216086406U (en) |
-
2021
- 2021-02-25 CN CN202120409855.5U patent/CN216086406U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee after: United New Energy Automobile Co.,Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee before: Hozon New Energy Automobile Co., Ltd. Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee after: Hozon New Energy Automobile Co., Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Patentee before: Hozon New Energy Automobile Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A motor rotor cooling system for an electric drive assembly Granted publication date: 20220318 Pledgee: Tongxiang Science and Technology Entrepreneurship Service Center Co.,Ltd. Pledgor: United New Energy Automobile Co.,Ltd. Registration number: Y2024330000709 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |