CN220874322U - Oil-water composite cooling motor - Google Patents
Oil-water composite cooling motor Download PDFInfo
- Publication number
- CN220874322U CN220874322U CN202322568218.4U CN202322568218U CN220874322U CN 220874322 U CN220874322 U CN 220874322U CN 202322568218 U CN202322568218 U CN 202322568218U CN 220874322 U CN220874322 U CN 220874322U
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- oil
- cooling
- bearing
- pan
- shell
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- 238000001816 cooling Methods 0.000 title claims abstract description 115
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 195
- 239000010687 lubricating oil Substances 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model relates to an oil-water composite cooling motor, which comprises a shell (1), two end covers (2), a stator (3), a rotating shaft (5) and a rotor (6); a hollow water channel (11) is arranged in the shell (1) for water cooling; an oil pan (12) is arranged below the shell (11); the method is characterized in that: the top of the casing (1) is provided with a top oil collecting cavity (13), the oil pan (12) supplies cooling oil to the top oil collecting cavity (13) through the oil pump (7) and the pipeline (8), the top oil collecting cavity (13) is internally provided with an oil injection hole (14) facing the end part of the stator and a bearing oil supply hole (15), and the position of the bearing oil supply hole (15) is lower than the oil injection hole (14); the inner sides of the two end covers (2) are correspondingly provided with a lubricating oil temporary storage cavity (21) for collecting part of oil under the oil spraying holes, and the lubricating oil temporary storage cavity (21) is communicated with the inside of the bearing (4) through a channel.
Description
Technical Field
The utility model relates to the field of motors, in particular to an oil-water composite cooling motor of a new energy automobile.
Background
In the field of new energy automobiles, motor cooling technology is continuously developed along with the continuous improvement of power density requirements, and the cooling capacity is continuously enhanced from water cooling, oil cooling and the current compound cooling technology. The cooling oil in the oil-cooled motor structure is directly sprayed onto the heat source stator winding, the cooling effect is optimal, and the cooling oil can be unified with gear set lubricating oil and share one set of oil pump and oil-water heat exchange device, so that the cooling oil is widely applied to a three-in-one power system of a passenger car.
However, for higher performance power systems, such as high power commercial vehicle drive motors, the power high heat dissipation requirements are large, and separate water or oil cooling systems have been struggled, so oil-water composite cooling techniques have been proposed.
The existing oil-water composite cooling technology combines the advantages of water cooling and oil cooling, the cooling effect is optimal, but the oil-water composite cooling structure is complex, the water cooling and oil cooling systems are strongly coupled and mutually dependent, the system reliability is low, and particularly in the existing oil-water composite cooling system, cooling water is connected with other systems of the whole vehicle in series and is a cooling source of lubricating oil, meanwhile, the lubricating oil is required at the running time of a bearing, and the oil-water system are mutually supported and are indispensable. When the automobile runs, once the oil cooling system fails, the lubricating oil supplied to the bearing is stopped, and the automobile can only stop on the road to wait for rescue; in addition, the output power of the driving motor is not high under the actual road condition of the automobile and is not high under the low-load working condition, the heat radiation capability requirement on the cooling system is not high, the water cooling system and the oil cooling system are operated at the same time all the time, the waste is relatively high, and the energy is not saved.
Disclosure of Invention
The utility model aims to provide an oil-water composite cooling motor, which is used for decoupling oil cooling and water cooling, and can still keep the supply of bearing lubricating oil for a period of time when an oil cooling loop fails or is in an active closing state, so that a vehicle can continue to run under a single water cooling working condition.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an oil-water composite cooling motor comprises a shell, two end covers at the end parts of the shell, a stator arranged in the shell, a rotating shaft rotatably supported between the two end covers by a bearing and a rotor arranged on the rotating shaft; a hollow water channel is arranged in the shell for water cooling; an oil pan is arranged below the shell to contain cooling oil, and the oil pan is connected with an oil pump and a pipeline;
The top of the shell is provided with a top oil collecting cavity, the oil pan supplies cooling oil to the top oil collecting cavity through the oil pump and the pipeline, the top oil collecting cavity is internally provided with an oil injection hole facing the end part of the stator, the two ends of the top oil collecting cavity are respectively provided with a bearing oil supply hole, and the bearing oil supply holes are led into the bearing on the corresponding side through a channel; the position of the bearing oil supply hole is lower than the oil injection hole; an oil return hole is formed in the bottom of the shell towards the oil pan so as to return cooling oil to the oil pan, so that a cooling circulation loop of the cooling oil is formed;
The inner sides of the two end covers are correspondingly provided with a lubricating oil temporary storage cavity for collecting part of oil under the oil spraying holes, and the lubricating oil temporary storage cavity is communicated into the bearing through a channel so as to provide lubricating oil for the bearing; the caliber of the channel from the lubricating oil temporary storage cavity to the bearing is smaller than that from the bearing oil supply hole to the bearing.
In the scheme, the cooling oil in the oil pan is isolated from the cooling oil in the gear cavity.
In the above document, the bearing oil supply hole opens into the bearing through a passage provided in the inside of the end cap.
In the scheme, a plurality of inner cooling fins are arranged in the oil pan.
Further, the bottom of the oil pan is provided with a plurality of raised external cooling fins.
Still further, the outer periphery of the oil pan is also provided with a plurality of raised external fins.
In the scheme, the top and the periphery of the top oil collecting cavity are provided with top cooling fins.
Compared with the prior art, the utility model has the beneficial effects that:
According to the utility model, through the design of the high and low positions of the oil injection hole and the bearing oil supply hole in the top oil collecting cavity and the design of the special temporary lubricating oil storage cavity on the end cover, the oil pump continuously supplies oil to the top oil collecting cavity under the working condition of oil cooling opening, the oil supply quantity is larger than the oil output quantity, the liquid level of the top oil collecting cavity is always higher than that of the oil injection hole, cooling oil is respectively supplied to the inside of a motor stator and a bearing through the oil injection hole and the bearing oil supply hole, so that stator cooling and bearing lubrication are realized, and meanwhile, part of cooling oil enters the temporary lubricating oil storage cavity; when the oil cooling loop is actively closed or the oil cooling loop fails under low load, the liquid level of the top oil collecting cavity gradually drops to be lower than the oil spraying hole, so that the cooling oil is stopped to be sprayed to the stator, the bearing oil supplying hole leading to the bearing continues to supply oil to the bearing chamber to ensure the lubrication of the bearing, and then when the oil in the top oil collecting cavity is completely consumed, the lubricating oil temporary storage cavity can still supply lubricating oil to the bearing, so that the supply of the lubricating oil is prolonged as much as possible, and the motor can continue to work under the single water cooling working condition. Specifically, the oil supply duration can be adjusted by adjusting the caliber of the channel from the lubricating oil temporary storage cavity to the bearing and the caliber of the channel from the bearing oil supply hole to the bearing.
By taking a 1200Nm400kW motor for driving a heavy truck multi-gear box as an example, experiments prove that the motor can continue to run for more than 30 minutes under a single water cooling working condition.
Therefore, the utility model successfully decouples the water cooling and the oil cooling, under the actual road condition, the output power of the driving motor of the automobile is not high and is in a low-load working condition most of the time, and when the heat radiation capacity requirement on the cooling system is not high, the oil cooling loop can be actively stopped to save energy, and the heat radiation and cooling requirement can be met only by water cooling; the oil cooling circuit may also be set to be timed for short start-up to replenish the lubrication oil to the bearings during long-term low load conditions.
When the oil cooling loop breaks down, the operation can be maintained at a low speed under the single water cooling working condition, so that the vehicle can drive to a maintenance factory, and the vehicle can only wait for rescue when being broken on the road.
Drawings
FIG. 1 is a schematic diagram of a motor structure according to an embodiment of the present utility model;
FIG. 2 is a schematic perspective view of a housing according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a second embodiment of the present utility model;
FIG. 4 is a schematic diagram of a full section of a housing according to an embodiment of the present utility model;
Fig. 5 is a schematic perspective view of an end cap according to an embodiment of the present utility model.
In the above figures: 1. a housing; 11. a hollow waterway; 12. an oil pan; 121. an inner fin; 122. an external heat sink; 13. a top oil collecting cavity; 14. an oil injection hole; 15. a bearing oil supply hole; 16. an oil return hole; 2. an end cap; 21. a lubricating oil temporary storage cavity; 3. a stator; 4. a bearing; 5. a rotating shaft; 6. a rotor; 7. an oil pump; 8. and (5) a pipeline.
Detailed Description
The utility model is further described below with reference to the accompanying drawings and examples:
Examples: the present invention will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present invention, without departing from the spirit and scope of the present invention, as will be apparent to those of skill in the art upon understanding the embodiments of the present invention.
Referring to fig. 1, an oil-water composite cooling motor comprises a casing 1, two end covers 2 at the end parts of the casing 1, a stator 3 arranged in the casing 1, a rotating shaft 5 rotatably supported between the two end covers 2 by a bearing 4, and a rotor 6 arranged on the rotating shaft 5.
Referring to fig. 1, a hollow water channel 11 is provided in the casing 1 for water cooling, and the hollow water channel 11 is a spiral channel formed in the casing wall as shown in the figure, and other forms of water channels are possible. Specifically, the hollow water channel 11 is connected in series with a water channel on the controller shell and a water channel on the speed reducer shell and then is connected with a cooling water supply system on the automobile.
Referring to fig. 1-4, an oil pan 12 is arranged below the casing 1 to accommodate cooling oil, and the oil pan 12 is connected with an oil pump 7 and a pipeline 8. The top of the shell 1 is provided with a top oil collecting cavity 13, and the oil pan 12 supplies cooling oil to the top oil collecting cavity 13 through the oil pump 7 and the pipeline 8.
Referring to fig. 1-4, the top oil collecting cavity 13 is provided with an oil injection hole 14 facing the end of the stator, and two ends of the top oil collecting cavity 13 are respectively provided with a bearing oil supply hole 15, wherein the bearing oil supply holes 15 are led into the bearing 4 at the corresponding side through channels; further, the position of the bearing oil supply hole 15 is lower than the oil injection hole 14, and as shown in fig. 4, the position of the bearing oil supply hole 15 is lower than the oil injection hole 14 by a distance a.
As shown in fig. 1 to 4, the oil jet 14 is provided toward the middle of the stator 3 in addition to the end of the stator 3. Specifically, six fuel injection holes 14 are provided in each of the left, middle and right. The oil spray holes 14 at both ends thereof are inclined to the outside so as to spray against the ends of the stator.
Specifically, the oil spraying hole 14 may be provided as a hole, or various nozzles may be used.
As shown in fig. 1-4, an oil return hole 16 is formed in the bottom of the casing 1 toward the oil pan 12.
During oil cooling operation, the cooling oil is supplied to the top oil collecting cavity 13 from the oil pan 12 through the oil pump 7 and the pipeline 8, sprayed on the stator 3 through the oil spraying holes 14, falls down, and flows back to the oil pan 12 through the oil return holes 16 to form a cooling circulation loop of the cooling oil.
As shown in fig. 1 and 5, a temporary lubricating oil storage cavity 21 for collecting part of oil is correspondingly arranged below the oil spraying holes on the inner sides of the two end covers 2, and the temporary lubricating oil storage cavity 21 is communicated into the bearing 4 through a channel so as to provide lubricating oil for the bearing 4, and during the oil cooling process, the cooling oil can partially fall into the temporary lubricating oil storage cavity 21.
The caliber of the channel from the lubricating oil temporary storage cavity 21 to the bearing 4 is smaller than that from the bearing oil supply hole 15 to the bearing 4.
The bearing oil supply hole 15 opens into the bearing 4 through a passage provided in the interior of the end cap 2.
As shown in fig. 1 to 4, a plurality of inner fins 121 are provided in the oil pan 12. The bottom and the periphery of the oil pan 12 are provided with a plurality of raised external cooling fins 122, so that when the oil pan 12 is exposed to the bottom of the automobile, the cooling oil can be cooled by the external air, and the working condition of independent oil cooling can also be normally operated. Preferably, top and outer circumferences of the top oil collecting cavity 13 may be further provided with top cooling fins.
The motor may be provided with additional channels for spraying the rotor 6, which may be of prior art.
The cooling oil in the oil pan 12 is isolated from the cooling oil in the gear cavity, so that the pollution of the lubricating oil is avoided, the insulation fault of the motor stator is avoided, and the service life is shortened.
When the vehicle is started in an accelerating way or climbs a heavy load, the driving motor needs to output larger power, when the heat dissipation demand of the cooling system is larger, both water cooling and oil cooling are started, the oil pump 7 injects cooling oil into the top oil collecting cavity 13, then the cooling oil is sprayed into the inner cavity of the motor through the oil spraying holes 14 distributed at different positions of the top oil collecting cavity 13, after passing through the winding end part of the stator 3, the lubricating oil temporary storage cavity 21 and the bearing 4, the cooling oil is gathered into the oil pan 12, the inner radiating fins 121 are arranged in the oil pan 12, the outer radiating fins 122 consistent with the running direction of the vehicle are arranged outside, and heat in the cooling oil can be led out through cooling water in the hollow water channel 11 inwards, and can also be dissipated through the outer radiating fins 122 in an air mode outwards. The combination of the oil cooling system and the water cooling system meets the heat dissipation capability requirement at high power output which occurs in short time. When the output power of the driving motor of the automobile is not high and is in a low-load working condition in most of the time and the heat dissipation capacity requirement of the cooling system is not high, the oil cooling system can be actively stopped to save energy, and the heat dissipation and cooling requirements can be met only by the water cooling system; the oil cooling circuit may also be set to be timed for short start-up to replenish the lubrication oil to the bearings during long-term low load conditions.
When the oil cooling loop breaks down, the operation can be maintained at a low speed under the single water cooling working condition, so that the vehicle can drive to a maintenance factory, and the vehicle can only wait for rescue when being broken on the road.
When the oil cooling loop is actively closed or the oil cooling loop fails under low load, the liquid level of the top oil collecting cavity 13 gradually drops below the oil injection hole 14, so that the cooling oil is stopped to be sprayed to the stator 3, the bearing oil supply hole 15 leading to the bearing 4 continues to supply oil to the bearing 4 to ensure the lubrication of the bearing 4, and then when the oil in the top oil collecting cavity 13 is completely consumed, the lubricating oil temporary storage cavity 21 can still supply lubricating oil to the bearing 4, so that the supply of the lubricating oil is prolonged as much as possible, and the working can be continued under the single water cooling working condition.
The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.
Claims (6)
1. An oil-water composite cooling motor comprises a machine shell (1), two end covers (2) at the end parts of the machine shell (1), a stator (3) arranged inside the machine shell (1), a rotating shaft (5) rotatably supported between the two end covers (2) by a bearing (4) and a rotor (6) arranged on the rotating shaft (5); a hollow water channel (11) is arranged in the shell (1) for water cooling; an oil pan (12) is arranged below the shell (1) to contain cooling oil, and the oil pan (12) is connected with an oil pump (7) and a pipeline (8); the method is characterized in that:
The top of the shell (1) is provided with a top oil collecting cavity (13), the oil pan (12) supplies cooling oil to the top oil collecting cavity (13) through the oil pump (7) and the pipeline (8), an oil injection hole (14) facing the end part of the stator is arranged in the top oil collecting cavity (13), two ends of the top oil collecting cavity (13) are respectively provided with a bearing oil supply hole (15), and the bearing oil supply holes (15) are led into the bearings (4) at the corresponding sides through channels; the position of the bearing oil supply hole (15) is lower than that of the oil injection hole (14); an oil return hole (16) is formed in the inner bottom of the shell (1) towards the oil pan (12) so as to return cooling oil to the oil pan (12) to form a cooling circulation loop of the cooling oil;
The inner sides of the two end covers (2) are correspondingly provided with a lubricating oil temporary storage cavity (21) for collecting part of oil under the oil spraying holes, and the lubricating oil temporary storage cavity (21) is communicated into the bearing (4) through a channel so as to provide lubricating oil for the bearing (4); the caliber of the channel from the lubricating oil temporary storage cavity (21) to the bearing (4) is smaller than that from the bearing oil supply hole (15) to the bearing (4).
2. The oil-water composite cooling motor according to claim 1, wherein: the bearing oil supply hole (15) is communicated with the inside of the bearing (4) through a channel arranged in the end cover (2).
3. The oil-water composite cooling motor according to claim 1, wherein: a plurality of inner cooling fins (121) are arranged in the oil pan (12).
4. An oil-water composite cooling motor according to claim 1 or 3, wherein: the bottom of the oil pan (12) is provided with a plurality of raised external fins (122).
5. The oil-water composite cooling motor according to claim 4, wherein: the outer periphery of the oil pan (12) is also provided with a plurality of raised external fins (122).
6. The oil-water composite cooling motor according to claim 1, wherein: the top and the periphery of the top oil collecting cavity (13) are provided with top cooling fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322568218.4U CN220874322U (en) | 2023-09-21 | 2023-09-21 | Oil-water composite cooling motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322568218.4U CN220874322U (en) | 2023-09-21 | 2023-09-21 | Oil-water composite cooling motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220874322U true CN220874322U (en) | 2024-04-30 |
Family
ID=90821738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322568218.4U Active CN220874322U (en) | 2023-09-21 | 2023-09-21 | Oil-water composite cooling motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220874322U (en) |
-
2023
- 2023-09-21 CN CN202322568218.4U patent/CN220874322U/en active Active
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