CN219988998U - Cooling system for double-motor electric drive bridge and double-motor system - Google Patents
Cooling system for double-motor electric drive bridge and double-motor system Download PDFInfo
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- CN219988998U CN219988998U CN202320264910.5U CN202320264910U CN219988998U CN 219988998 U CN219988998 U CN 219988998U CN 202320264910 U CN202320264910 U CN 202320264910U CN 219988998 U CN219988998 U CN 219988998U
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- 238000001816 cooling Methods 0.000 title claims abstract description 106
- 239000003921 oil Substances 0.000 claims abstract description 239
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 46
- 239000010705 motor oil Substances 0.000 claims abstract description 30
- 230000002452 interceptive effect Effects 0.000 claims abstract description 16
- 230000009977 dual effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 230000003749 cleanliness Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model provides a cooling system for a double-motor electric drive bridge and a double-motor system, comprising a first oil cooling loop: the first oil pump is communicated with a first main input oil way, the first main input oil way, a first motor oil way and a speed reducer oil way are communicated with each other, the speed reducer oil way is communicated with the first oil pump, and the first heat exchanger is arranged on the first main input oil way; second oil cooling circuit: the second oil pump is communicated with a second main input oil way, the second main input oil way, a second motor oil way and a speed reducer oil way are communicated with each other, the speed reducer oil way is communicated with the second oil pump, and the second heat exchanger is arranged on the second main input oil way; an interactive oil way is communicated between the first main input oil way and the second main input oil way, and a switching valve for controlling the interactive oil way to be conducted or blocked is arranged on the interactive oil way. The connection or disconnection of the first oil cooling loop and the second oil cooling loop is realized, the heat dissipation requirements of different whole vehicle movement working conditions can be met, and the applicability of the cooling system is improved.
Description
Technical Field
The utility model relates to the technical field of new energy automobiles, in particular to a cooling system for a double-motor electric drive bridge and a double-motor system.
Background
At present, in pure electric drive axle products in the field of new energy automobiles, the development trend of the application of double-motor electric drive axles, especially the commercial vehicle field, is obvious. Meanwhile, the design and technical method of the motor cooling system in the prior art have the characteristic of diversification.
The traditional Chinese patent application document with the publication number of CN217553688U discloses a whole vehicle cooling waterway system based on a double-motor ECVT gearbox, which comprises a cooling water pipe, an engine, a double-motor ECVT and a double-electric control unit; the cooling water output end of the engine is connected with the cooling water input end of the double-motor ECVT, the cooling water output end of the double-motor ECVT is connected with the input end of the double-electric control unit, the output end of the double-electric control unit is connected with the cooling water input end of the engine to form a cooling liquid circulating system, the cooling water pipe sequentially passes through the cooling water output end of the engine to enter the cooling water input end of the double-motor ECVT, then enters the input end of the double-electric control unit through the cooling water output end of the double-motor ECVT, and finally enters the cooling water input end of the engine through the output end of the double-electric control unit to form a whole car cooling loop.
The cooling system for the double motor in the prior art has the following problems, and the problems to be improved are that:
1. the cooling system adopts a single series connection mode to cool the double motors, so that the heat dissipation requirements of the double motors cannot be balanced, and the applicability is poor.
2. The power density of the water-cooled motor is lower than that of the oil-cooled motor, and the cooling requirement of the whole vehicle under each gesture is difficult to meet.
Disclosure of Invention
In view of the drawbacks of the prior art, an object of the present utility model is to provide a cooling system for a dual motor drive bridge and a dual motor system.
According to the utility model, a cooling system for a double-motor electric drive bridge is provided, comprising a first oil cooling loop: the oil pump comprises a first oil pump, a first main input oil way, a first motor oil way, a speed reducer oil way and a first heat exchanger, wherein an outlet of the first oil pump is communicated with the first main input oil way, the first motor oil way and the speed reducer oil way are all mutually communicated, the speed reducer oil way is communicated with an inlet of the first oil pump, and the first heat exchanger is arranged on the first main input oil way; second oil cooling circuit: the oil pump comprises a second oil pump, a second main input oil way, a second motor oil way and a second heat exchanger, wherein an outlet of the second oil pump is communicated with the second main input oil way, the second motor oil way and a speed reducer oil way are all mutually communicated, the speed reducer oil way is communicated with an inlet of the second oil pump, and the second heat exchanger is arranged on the second main input oil way; an interactive oil way is communicated between the first main input oil way and the second main input oil way, and a switching valve for controlling the interactive oil way to be conducted or blocked is arranged on the interactive oil way.
Preferably, both the first heat exchanger and the second heat exchanger comprise water cooled heat exchangers.
Preferably, a first filter is arranged between the speed reducer oil way and the first oil pump; a second filter is arranged between the speed reducer oil way and the second oil pump.
Preferably, the first motor oil passage and the second motor oil passage both include a plurality of branch oil passages.
Preferably, the switching valve is in a closed state, the first oil pump and the second oil pump are both in an open state, and the first oil cooling circuit and the second oil cooling circuit are connected in parallel.
Preferably, the switching valve is in an open state, both the first oil pump and the second oil pump are in an open state, and the first oil cooling circuit and the second oil cooling circuit are connected in series.
Preferably, the first oil pump is in an open state, the second oil pump is in a closed state, and the cooling oil in the first oil cooling loop enters the second motor oil path through the speed reducer oil path; or the first oil pump is in a closed state, the second oil pump is in an open state, and cooling oil in the second oil cooling loop enters the first motor oil way through the speed reducer oil way.
The double-motor system provided by the utility model further comprises two groups of motors, two groups of reducers and a shell, wherein the two groups of motors and the two groups of reducers are arranged in the shell, the two groups of motors are respectively and correspondingly connected with the two groups of reducers, and the two groups of reducers are positioned between the two groups of motors; the first and second oil cooling circuits are both integrated on the housing.
Preferably, the two groups of motors are arranged side by side, and the output shafts of the two groups of reducers are collinear.
Preferably, the first oil pump, the second oil pump, the first heat exchanger and the second heat exchanger are all located outside the shell.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the first oil cooling loop and the second oil cooling loop are communicated through the interactive oil way, and the interactive oil way is switched between the on state and the off state through the switching valve, so that the first oil cooling loop and the second oil cooling loop are communicated or disconnected, and the two motors can be cooled by starting one oil pump, so that the cooling system can adapt to the heat dissipation requirements of different whole vehicle movement conditions, and the applicability of the cooling system is improved.
2. According to the utility model, the first oil cooling loop and the second oil cooling loop are integrated on the shell, so that the cooling efficiency is improved, the integration level is high, and the space utilization rate is good.
3. According to the utility model, the motor is cooled through the plurality of branch oil ways, so that the contact area between the cooling oil and the motor is increased, and the cooling efficiency is improved.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the overall structure of a cooling system embodying the present utility model;
FIG. 2 is a flow diagram of a cooling system when the switching valve is closed, according to the present utility model;
FIG. 3 is a flow chart of a cooling system when the first oil pump is started and the second oil pump is closed.
Reference numerals:
first oil pump 1 second motor oil passage 22
First main input oil circuit 11 second heat exchanger 23
First motor oil passage 12 second filter 24
First heat exchanger 13 speed reducer oil circuit 3
The first filter 14 exchanges the oil circuit 4
Second oil pump 2 on-off valve 5
Second main input oil passage 21
Detailed Description
The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.
As shown in fig. 1, the cooling system for the double-motor electric drive bridge provided by the utility model comprises a first oil cooling loop and a second oil cooling loop, wherein the first oil cooling loop cools a first motor, the second oil cooling loop cools a second motor, an interactive oil way 4 is communicated between the first oil cooling loop and the second oil cooling loop, and a worker can control the communication or blocking of the interactive oil way 4 to control the communication of the first oil cooling loop and the second oil cooling loop.
Specifically, the first oil cooling circuit includes a first oil pump 1, a first main input oil passage 11, a first motor oil passage 12, a speed reducer oil passage 3, and a first heat exchanger 13, the outlet of the first oil pump 1 communicates with the first main input oil passage 11, the first motor oil passage 12, and the speed reducer oil passage 3 are all mutually communicated, the speed reducer oil passage 3 communicates with the inlet of the first oil pump 1, and the first heat exchanger 13 is provided on the first main input oil passage 11.
The second oil cooling circuit comprises a second oil pump 2, a second main input oil circuit 21, a second motor oil circuit 22 and a second heat exchanger 23, wherein an outlet of the second oil pump 2 is communicated with the second main input oil circuit 21, the second motor oil circuit 22 and a speed reducer oil circuit 3 are communicated with each other, the speed reducer oil circuit 3 is communicated with an inlet of the second oil pump 2, and the second heat exchanger 23 is arranged on the second main input oil circuit 21.
The interactive oil path 4 is communicated with the first main input oil path 11 and the second main input oil path 21, and a switch valve 5 for controlling the interactive oil path 4 to be conducted or blocked is arranged on the interactive oil path 4.
More specifically, both the first heat exchanger 13 and the second heat exchanger 23 include water-cooled heat exchangers. The first heat exchanger 13 is located at the junction between the first main input flow path and the outlet of the first oil pump 1, and cools the cooling oil that is input to the first main input flow path by the first oil pump 1. The second heat exchanger 23 is located at the junction between the second main input flow path and the outlet of the second oil pump 2, and cools the cooling oil that is input to the second main input flow path by the second oil pump 2. The first filter 14 is arranged between the speed reducer oil way 3 and the first oil pump 1, so that the cooling oil flowing back to the first oil pump 1 can be filtered, the cleanliness of the cooling oil is kept, and the cooling effect is ensured. The second filter 24 is arranged between the speed reducer oil way 3 and the second oil pump 2, so that the cooling oil flowing back to the second oil pump 2 can be filtered, the cleanliness of the cooling oil is kept, and the cooling effect is ensured.
Further, both the first motor oil passage 12 and the second motor oil passage 22 include a plurality of branch oil passages, and the plurality of branch oil passages of the first motor oil passage 12 extend along the outer contour trend of the first motor, improving the cooling effect on the first motor. The plurality of branch oil passages of the second motor oil passage 22 extend along the outer contour trend of the second motor, improving the cooling effect on the second motor.
As shown in fig. 2, one possible implementation is: the switch valve 5 is in a closed state, the first oil pump 1 and the second oil pump 2 are both in an open state, and the first oil cooling circuit and the second oil cooling circuit are connected in parallel. At this time, the first oil cooling circuit cools the first motor, and the second oil cooling circuit cools the second motor. The preferable working state of the whole vehicle is as follows: when the whole vehicle normally runs without inclination or with small angle inclination, the first oil cooling loop cools the first motor, the second oil cooling loop cools the second motor, the first oil cooling loop is not communicated with the second oil cooling loop, and a proper amount of cooling oil can be provided for the corresponding first oil pump 1 and/or second oil pump 2 according to the cooling requirement of each motor by respectively monitoring the thermal field or the temperature rise condition of the first motor and the second motor.
As shown in fig. 1, one possible embodiment is: when the whole vehicle is inclined at a large angle, cooling oil flows to one side of the whole vehicle, and the risk of oil suction and empty suction of the oil pump at the other side exists. At this time, the switching valve 5 is put in an open state, both the first oil pump 1 and the second oil pump 2 are put in an open state, and the first oil cooling circuit and the second oil cooling circuit are connected in series. The first oil cooling loop and the second oil cooling loop are communicated, so that when the whole vehicle is inclined at a large angle, enough cooling oil can be ensured in the first oil cooling loop and the second oil cooling loop, and the overheat condition of the motor or the speed reducer is avoided.
As shown in fig. 3, one possible implementation is: when the whole vehicle runs under low load, the cooling requirement is not great, and at the moment, the oil can be supplied to the whole electric drive bridge by adopting the single-side oil pump to cool, so that the double oil pumps are prevented from working in a low-load low-efficiency area at the same time, and the energy-saving effect is achieved. Specifically, the first oil pump 1 is in an open state, the second oil pump 2 is in a closed state, and the cooling oil in the first oil cooling circuit enters the second motor oil passage 22 through the speed reducer oil passage 3. Or, the first oil pump 1 is in a closed state, the second oil pump 2 is in an open state, and the cooling oil in the second oil cooling circuit enters the first motor oil path 12 through the speed reducer oil path 3.
The utility model also provides a double-motor system, which adopts the cooling system for the double-motor electric drive bridge and further comprises two groups of motors, two groups of reducers and a shell, wherein the two groups of motors and the two groups of reducers are arranged in the shell, the two groups of motors are respectively and correspondingly connected with the two groups of reducers, and the two groups of reducers are positioned between the two groups of motors. The two groups of motors are arranged side by side, and the output shafts of the two groups of speed reducers are collinear
Both the first oil cooling circuit and the second oil cooling circuit are integrated on the housing, and the first oil pump 1, the second oil pump 2, the first heat exchanger 13, and the second heat exchanger 23 are all located outside the housing.
In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. A cooling system for a dual motor drive bridge, comprising:
first oil cooling circuit: the oil pump comprises a first oil pump (1), a first main input oil circuit (11), a first motor oil circuit (12), a speed reducer oil circuit (3) and a first heat exchanger (13), wherein an outlet of the first oil pump (1) is communicated with the first main input oil circuit (11), the first motor oil circuit (12) and the speed reducer oil circuit (3) are communicated with each other, the speed reducer oil circuit (3) is communicated with an inlet of the first oil pump (1), and the first heat exchanger (13) is arranged on the first main input oil circuit (11);
second oil cooling circuit: the oil pump comprises a second oil pump (2), a second main input oil circuit (21), a second motor oil circuit (22) and a second heat exchanger (23), wherein an outlet of the second oil pump (2) is communicated with the second main input oil circuit (21), the second motor oil circuit (22) and a speed reducer oil circuit (3) are all mutually communicated, the speed reducer oil circuit (3) is communicated with an inlet of the second oil pump (2), and the second heat exchanger (23) is arranged on the second main input oil circuit (21);
an interactive oil way (4) is communicated between the first main input oil way (11) and the second main input oil way (21), and a switch valve (5) for controlling the interactive oil way (4) to be conducted or blocked is arranged on the interactive oil way (4).
2. Cooling system for a double motor electrically driven bridge according to claim 1, characterized in that both the first heat exchanger (13) and the second heat exchanger (23) comprise water cooled heat exchangers.
3. Cooling system for a double motor electric drive bridge according to claim 1, characterized in that a first filter (14) is arranged between the retarder oil circuit (3) and the first oil pump (1);
a second filter (24) is arranged between the speed reducer oil way (3) and the second oil pump (2).
4. The cooling system for a two-motor electrically driven bridge according to claim 1, characterized in that both the first motor oil circuit (12) and the second motor oil circuit (22) include a plurality of branch oil circuits.
5. Cooling system for a double motor electrically driven bridge according to claim 1, characterized in that the switching valve (5) is in a closed state, that both the first oil pump (1) and the second oil pump (2) are in an open state, that the first and the second oil cooling circuit are connected in parallel.
6. Cooling system for a double motor electrically driven bridge according to claim 1, characterized in that the switching valve (5) is in an open state, that both the first oil pump (1) and the second oil pump (2) are in an open state, that the first and the second oil cooling circuits are connected in series.
7. A cooling system for a double motor electrically driven bridge according to claim 1, characterized in that the first oil pump (1) is in an open state and the second oil pump (2) is in a closed state, the cooling oil in the first oil cooling circuit entering the second motor oil circuit (22) through the retarder oil circuit (3);
or the first oil pump (1) is in a closed state, the second oil pump (2) is in an open state, and cooling oil in the second oil cooling loop enters the first motor oil path (12) through the speed reducer oil path (3).
8. A dual-motor system, characterized in that the cooling system for the dual-motor electric drive bridge according to any one of claims 1-7 is adopted, and the dual-motor electric drive bridge further comprises two groups of motors, two groups of speed reducers and a shell, wherein the two groups of motors and the two groups of speed reducers are arranged in the shell, the two groups of motors are respectively and correspondingly connected with the two groups of speed reducers, and the two groups of speed reducers are positioned between the two groups of motors;
the first and second oil cooling circuits are both integrated on the housing.
9. The dual motor system as claimed in claim 8, wherein said motors are arranged side by side and wherein the output shafts of said reducers are collinear.
10. The dual motor system according to claim 8, wherein the first oil pump (1), the second oil pump (2), the first heat exchanger (13) and the second heat exchanger (23) are all located outside the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320264910.5U CN219988998U (en) | 2023-02-20 | 2023-02-20 | Cooling system for double-motor electric drive bridge and double-motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320264910.5U CN219988998U (en) | 2023-02-20 | 2023-02-20 | Cooling system for double-motor electric drive bridge and double-motor system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219988998U true CN219988998U (en) | 2023-11-10 |
Family
ID=88606978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320264910.5U Active CN219988998U (en) | 2023-02-20 | 2023-02-20 | Cooling system for double-motor electric drive bridge and double-motor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219988998U (en) |
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2023
- 2023-02-20 CN CN202320264910.5U patent/CN219988998U/en active Active
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