CN115539612A - Cooling and lubricating system, gearbox and automobile - Google Patents
Cooling and lubricating system, gearbox and automobile Download PDFInfo
- Publication number
- CN115539612A CN115539612A CN202110725438.6A CN202110725438A CN115539612A CN 115539612 A CN115539612 A CN 115539612A CN 202110725438 A CN202110725438 A CN 202110725438A CN 115539612 A CN115539612 A CN 115539612A
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- CN
- China
- Prior art keywords
- oil
- cooling
- lubricating
- generator
- oil way
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0476—Electric machines and gearing, i.e. joint lubrication or cooling or heating thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0436—Pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Abstract
The invention provides a cooling and lubricating system, a gearbox and an automobile, wherein the cooling and lubricating system is used for a double-motor hybrid gearbox comprising a generator and a driving motor, the cooling and lubricating system comprises a duplex pump, a low-pressure oil way, a high-pressure oil way, a valve plate, a distribution oil way, a generator cooling and lubricating oil way, a driving motor cooling and lubricating oil way and a clutch cooling and lubricating oil way, the duplex pump is arranged in the hybrid gearbox and used as a power source of the low-pressure oil way and the high-pressure oil way, the duplex pump extracts oil from an oil pan of the hybrid gearbox and conveys the oil to the low-pressure oil way and the high-pressure oil way, the low-pressure oil way is connected with the distribution oil way through the valve plate, the high-pressure oil way is connected with the generator through the valve plate, and the distribution oil way is respectively connected with the generator cooling and lubricating oil way, the driving motor cooling and lubricating oil way and the clutch cooling and lubricating oil way.
Description
Technical Field
The invention relates to a cooling and lubricating system, a gearbox and an automobile, in particular to a cooling and lubricating system for a dual-motor hybrid gearbox comprising a generator and a driving motor.
Background
With the increasing requirements on automobile emission and oil consumption, the automobile industry is looking for various energy-saving solutions. The dual-motor hybrid transmission can reduce oil consumption by timely intervention of the engine and high efficiency of the energy recovery matching motor. For a lubrication cooling system of a hybrid transmission, in the prior art, a motor is mostly cooled by water, and the interior of the transmission is cooled by a conventional cooling mode.
In the patent of motor oil cooling system (CN 06411050 a), a single motor oil cooling method is adopted to cool the motor in the gearbox.
Disclosure of Invention
The technical problem to be solved by one aspect of the invention is how to adapt to the special cooling requirements of the double motors in the double-motor hybrid gearbox to cool the double motors. The double-motor hybrid gearbox is completely different from the driving working condition of an automobile carrying the single-motor gearbox, and has a pure electric mode of charging a generator and driving the motor, and a plurality of heat management scenes of simultaneously working two motors and the like.
In addition, other aspects of the present invention are directed to solving or alleviating other technical problems in the prior art.
The invention provides a cooling and lubricating system, a gearbox and an automobile, and particularly provides, according to one aspect of the invention:
a cooling and lubricating system is used for a double-motor hybrid transmission case comprising a generator and a driving motor, and comprises a dual pump, a low-pressure oil way, a high-pressure oil way, a valve plate, a distribution oil way, a generator cooling and lubricating oil way, a driving motor cooling and lubricating oil way and a clutch cooling and lubricating oil way, wherein the dual pump is arranged inside the hybrid transmission case and used as power sources of the low-pressure oil way and the high-pressure oil way, the dual pump extracts oil from an oil pan of the hybrid transmission case and conveys the oil to the low-pressure oil way and the high-pressure oil way, the low-pressure oil way is connected with the distribution oil way through the valve plate, the high-pressure oil way is connected with the generator through the valve plate, and the distribution oil way is respectively connected with the generator cooling and lubricating oil way, the driving motor cooling and lubricating oil way and the clutch cooling and lubricating oil way.
Optionally, according to one embodiment of the invention, an oil having a dynamic viscosity of 0.168 Pa s at-10 ℃ and 0.00427 Pa s at 90 ℃ is used in the cooling and lubricating system.
Optionally, according to an embodiment of the invention, a bypass oil passage is formed in the drive motor cooling and lubricating oil passage for cooling the shift actuator.
Alternatively, according to an embodiment of the present invention, a valve body is configured on the valve plate, and the valve body is configured such that when the valve body is closed, the oil of the high-pressure oil passage can flow into the generator cooling lubricating oil passage, and when the valve body is opened, the oil of the high-pressure oil passage can flow into the low-pressure oil passage.
Alternatively, according to an embodiment of the present invention, an oil guide nipple is configured at the output shaft of the generator for guiding the oil flowing in from the generator cooling lubricating oil passage into the shaft hole of the output shaft of the generator and the bearing, and a hole is configured on the oil guide nipple for lubricating the bearing.
Optionally, according to an embodiment of the present invention, a cooling circuit is configured on the low-pressure oil passage for cooling the oil in the low-pressure oil passage, and the cooling circuit includes an oil-water heat exchanger, an inverter, and a low-temperature cooling circulation radiator which are sequentially connected in a loop.
Optionally, according to an embodiment of the present invention, the cooling and lubricating system further includes an oil reservoir disposed below the generator and the driving motor for storing sprayed cooling oil and performing oil-immersed lubrication on the generator and the driving motor.
Optionally, according to an embodiment of the present invention, the cooling and lubricating system further includes an oil guide groove disposed above the main reduction gear of the hybrid transmission, the oil guide groove collecting oil stirred up by the main reduction gear of the hybrid transmission and guiding the oil into the oil reservoir.
According to another aspect of the present invention, there is provided a gearbox, wherein the gearbox comprises a cooling and lubricating system as described above.
According to a further aspect of the invention, there is provided a vehicle, wherein the vehicle comprises a gearbox as described above.
The beneficial effects of the invention include: the cooling and lubricating system according to the invention can control the cooling of the two motors in the hybrid transmission individually, and can cool and lubricate the rotor, the support bearing and other parts of the motors. Can increase the branch road in the cooling and lubrication system and cool off other parts that need the cooling, the flow in the oil circuit can be adjusted according to the operating mode, also can be through the valve body control flow in the valve plate to in good time adjust the work load of oil pump, promote gearbox efficiency. The cooling of the motor stator is carried out by adopting a spray oil pipe for spray cooling, the spray oil pipe adopts a larger inner diameter, and a plurality of spray small holes are formed in the spray oil pipe, so that the pressure drop of the system is small, and the energy consumption of the oil pump is reduced.
Drawings
The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,
fig. 1 shows a schematic structural diagram of a cooling and lubricating system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a duplex pump of the cooling and lubricating system according to an embodiment of the invention;
fig. 3 shows a flow distribution diagram of the cooling and lubricating system according to one embodiment of the present invention during cooling.
Detailed Description
It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structural modes and implementation modes without changing the essential spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and descriptive purposes only and not for purposes of indication or implication as to the relative importance of the respective components.
Referring to fig. 1, a schematic structural diagram of a cooling and lubricating system according to an embodiment of the present invention is shown. The cooling and lubricating system is used for a double-motor hybrid gearbox comprising a generator and a driving motor. The cooling and lubricating system comprises a double pump 1, a low-pressure oil way 2, a high-pressure oil way 3, a valve plate 4, a distribution oil way 5, a generator cooling and lubricating oil way 6, a driving motor cooling and lubricating oil way 7 and a clutch cooling and lubricating oil way 8. Referring to fig. 2, a schematic structural diagram of a duplex pump of a cooling and lubricating system is shown according to an embodiment of the present invention. The tandem pump 1 includes a pump body 101, an oil pump motor 102, and an oil pump controller 103. The tandem pump 1 is driven by an oil pump motor 102, and the oil pump motor 102 is controlled by an oil pump controller 103. The pump body of the duplex pump 1 is divided into two chambers, and low-pressure oil and high-pressure oil with different pressures are respectively output to the low-pressure oil path 2 and the high-pressure oil path 3. The dual pump 1 is arranged in the gearbox, the oil pump motor 102 of the dual pump is cooled by splashing through a reduction gear in the gearbox, and the dual pump 1 is covered by the gearbox shell and is lubricated by oil immersion through gearbox lubricating oil, so that better NVH performance can be realized. Compared with the dual pump 1, the real-time discharge capacity of the mechanical pump is strongly related to the vehicle speed, the flow of the vehicle is high at high speed, and the flow of the vehicle is low at low speed, and the dual pump 1 can realize the discharge capacity regulation and control as required and can ensure the high pressure of the high-pressure oil way 3 when the vehicle runs at low speed.
The oil used in the cooling and lubricating system proposed according to one embodiment of the present invention is an oil having a dynamic viscosity of 0.168 Pa s at-10 ℃ and a dynamic viscosity of 0.00427 Pa s at 90 ℃.
The low pressure oil path 2 and the high pressure oil path 3 are connected to a valve plate 4, a valve body and a structure for guiding the oil paths are constructed on the valve plate 4, by which the high pressure oil path 3 is connected to the generator 100 and the low pressure oil path 2 through the valve plate 4, the low pressure oil path 2 is connected to a distribution oil path 5 through the valve plate 4, and the distribution oil path 5 is connected to a generator cooling and lubricating oil path 6, a driving motor cooling and lubricating oil path 7, and a clutch cooling and lubricating oil path 8, respectively. The high-pressure oil path 3 is generally used for shifting the clutch 300, when the valve body on the valve plate 4 is closed, the redundant high-pressure oil for shifting can flow into the generator cooling and lubricating oil path 6 through the valve plate 4, and when the valve body is opened, the redundant high-pressure oil for shifting can flow into the low-pressure oil path 2 through the valve plate 4. The low-pressure oil of low-pressure oil passage 2 may be used for cooling and lubricating generator 100, motor 200, and clutch 300 via valve plate 4, that is, may flow into generator cooling and lubricating oil passage 6, drive motor cooling and lubricating oil passage 7, and clutch cooling and lubricating oil passage 8, respectively. In a further embodiment according to the invention, the valve plate 4 may also have no valve body, in which case the generator 100 is always lubricated by a combination of high-pressure oil and low-pressure oil. Further, an oil guide nipple for guiding the oil flowing into the generator cooling and lubricating oil passage 6 into the shaft hole of the output shaft of the generator 100 and the bearing is configured at the output shaft of the generator 100, a hole for lubricating the bearing as needed is configured on the oil guide nipple, and a high-speed seal ring for retaining the oil pressure is mounted on the oil guide nipple.
The generator cooling and lubricating oil path 6 cools and lubricates the generator 100, firstly, the generator stator is cooled by spraying through an oil pipe from the upper part, the oil pipe for cooling by spraying adopts a larger diameter, and a plurality of small spraying holes are formed in the oil pipe for cooling by spraying so as to reduce the pressure drop of the system. The oil then passes through the transmission housing oil gallery to the generator rotor and support bearings of the generator 100 and cools and lubricates them. The oil that cools the generator stator eventually falls into the oil reservoir 400 disposed below the generator 100, and at this time, the stator windings of the generator 100 can be oil-impregnated and lubricated.
The driving motor cooling and lubricating oil path 7 is used for cooling and lubricating the driving motor 200, firstly, the driving motor stator is sprayed and cooled from the upper part through an oil pipe, and then oil liquid reaches the driving motor rotor and the supporting bearing of the driving motor 200 through the gearbox shell integrated oil path and is cooled and lubricated. The oil liquid cooling the stator of the driving motor finally falls into the oil reservoir 400 disposed below the driving motor 200, and at this time, the stator of the driving motor 200 can be oil-impregnated and lubricated. A bypass line can be formed in the drive motor cooling/lubricating oil line 7 for cooling the gear shift actuators of the transmission.
An oil sump is also configured in the transmission and disposed above the main reduction gear of the transmission, the oil sump being configured to guide oil from a location where oil is more abundant (i.e., a rich region) to a location where oil is less abundant (i.e., a lean region). The oil guide groove can collect oil splashed by the main reduction gear of the transmission and guide the oil into the oil storage groove 400 below the generator 100 and the driving motor 200.
Referring to fig. 3, a flow distribution diagram of a cooling and lubricating system according to an embodiment of the present invention is shown.
Firstly, the double pump 1 extracts the oil of the gearbox from an oil pan and respectively conveys the oil to the high-pressure oil path 3 and the low-pressure oil path 2. The oil in the low-pressure oil circuit 2 is first filtered by a fine filter 9 and then cooled by a cooling circuit 10. The cooling circuit 10 includes an oil-water heat exchanger (SPHE) 11, an inverter (TPIM) 12, and a low-temperature cooling circulation radiator (LTR) 13, which are sequentially connected to form a circuit. The low-pressure oil is cooled by an oil-water heat exchanger 11 in the cooling circuit 10, and water heated by the cooling oil in the oil-water heat exchanger 11 is cooled by an inverter 12 and a low-temperature cooling circulation radiator 13. The high-pressure oil path 3 and the low-pressure oil path 2 are connected to a valve plate 4, and the high-pressure oil path 3 is connected with a generator cooling and lubricating oil path 6 through the valve plate 4. The low-pressure oil way 2 is connected with the distribution oil way 5 through a valve plate 4, and the distribution oil way 5 is respectively connected with a generator cooling and lubricating oil way 6, a driving motor cooling and lubricating oil way 7 and a clutch cooling and lubricating oil way 8. The oil for cooling and lubricating the generator 100 may include high pressure oil and low pressure oil, and the oil for lubricating the driving motor 200 and the clutch 300 includes only low pressure oil. In the valve plate 4, a valve body is formed, which is controlled by a transmission control unit (HTCP), and when the valve body is closed, the connection of the low-pressure oil line 2 to the generator cooling and lubricating oil line 6 is interrupted, and the generator 100 is cooled and lubricated by high-pressure oil only, and when the valve body is opened, the generator 100 is cooled and lubricated by high-pressure oil and low-pressure oil at the same time.
It should be understood that the cooling and lubrication system and transmission of the present invention may be incorporated into a variety of vehicles, including passenger cars, trucks, buses, hybrid vehicles, and the like. The subject of the invention is therefore also intended to protect various vehicles equipped with the cooling and lubricating system and gearbox of the invention.
It should be understood that all of the above preferred embodiments are exemplary and not restrictive, and that various modifications and changes in the specific embodiments described above, which would occur to persons skilled in the art upon consideration of the above teachings, are intended to be within the scope of the invention.
Claims (10)
1. A cooling and lubricating system is characterized by comprising a double-motor hybrid transmission case, a generator and a driving motor, wherein the double-motor hybrid transmission case comprises a double-pump, a low-pressure oil way, a high-pressure oil way, a valve plate, a distribution oil way, a generator cooling and lubricating oil way, a driving motor cooling and lubricating oil way and a clutch cooling and lubricating oil way, the double-pump is arranged inside the hybrid transmission case and used as power sources of the low-pressure oil way and the high-pressure oil way, the double-pump extracts oil from an oil pan of the hybrid transmission case and conveys the oil to the low-pressure oil way and the high-pressure oil way, the low-pressure oil way is connected with the distribution oil way through the valve plate, the high-pressure oil way is connected with the generator through the valve plate, and the distribution oil way is respectively connected with the generator cooling and lubricating oil way, the driving motor cooling and lubricating oil way and the clutch cooling and lubricating oil way.
2. The cooling and lubrication system according to claim 1, wherein an oil having a dynamic viscosity of 0.168 Pa s at-10 ℃ and a dynamic viscosity of 0.00427 Pa s at 90 ℃ is used in the cooling and lubrication system.
3. The cooling and lubrication system according to claim 1, wherein a bypass oil passage is configured in the drive motor cooling and lubrication oil passage for cooling a shift actuator.
4. The cooling and lubrication system according to claim 1, wherein a valve body is configured on the valve plate, and the valve body is configured such that when the valve body is closed, oil of the high-pressure oil passage can flow into the generator cooling and lubrication oil passage, and when the valve body is opened, oil of the high-pressure oil passage can flow into the low-pressure oil passage.
5. The cooling and lubricating system according to claim 1, wherein an oil guide nipple is formed at the output shaft of the generator for guiding the oil flowing from the generator cooling and lubricating oil path into the shaft hole of the output shaft of the generator and the bearing, and a hole is formed in the oil guide nipple for lubricating the bearing.
6. The cooling and lubricating system according to claim 1, wherein a cooling circuit is configured on the low-pressure oil passage for cooling oil in the low-pressure oil passage, and the cooling circuit includes an oil-water heat exchanger, an inverter, and a low-temperature cooling circulation radiator which are connected in series into a circuit.
7. The system of claim 1, further comprising an oil reservoir disposed below the generator and the drive motor for storing a spray of cooling oil and providing oil-flooded lubrication to the generator and the drive motor.
8. The cooling and lubrication system according to claim 7, further comprising an oil guide groove disposed above the main reduction gear of the hybrid transmission, the oil guide groove collecting oil stirred up by the main reduction gear of the hybrid transmission and guiding the oil into the oil reservoir.
9. A gearbox comprising a cooling and lubrication system according to any one of claims 1 to 8.
10. A motor vehicle, characterized by comprising a gearbox according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725438.6A CN115539612A (en) | 2021-06-29 | 2021-06-29 | Cooling and lubricating system, gearbox and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725438.6A CN115539612A (en) | 2021-06-29 | 2021-06-29 | Cooling and lubricating system, gearbox and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115539612A true CN115539612A (en) | 2022-12-30 |
Family
ID=84705708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110725438.6A Pending CN115539612A (en) | 2021-06-29 | 2021-06-29 | Cooling and lubricating system, gearbox and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115539612A (en) |
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2021
- 2021-06-29 CN CN202110725438.6A patent/CN115539612A/en active Pending
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