Lubricating system of electric drive assembly, electric drive assembly and vehicle

Abstract

The utility model relates to a lubricating system of an electric drive assembly, the electric drive assembly and a vehicle, the lubricating system of the electric drive assembly comprises a main oil way, a driving motor oil way used for lubricating a driving motor, a generator oil way used for lubricating a generator and at least one control valve used for controlling the oil quantity of lubricating oil, and the main oil way is connected with the driving motor oil way; the driving motor oil way is used for lubricating the driving motor, the generator oil way is used for lubricating the generator, the main oil way is connected with the driving motor oil way and is connected with the generator oil way, and a control valve is arranged between the main oil way and at least one of the driving motor oil way and the generator oil way. The control valve can control the oil quantity of the lubricating oil, and can cut off oil supply to the motor which stops running or reduce the oil supply quantity of the motor which stops running, so that the power consumption of an oil pump on a main oil way is reduced, and the oil quantity distribution of a plurality of oil ways can be adjusted according to the actual running working condition so as to improve the endurance of the whole vehicle.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric drive lubrication, in particular to a lubrication system of an electric drive assembly, an electric drive assembly and a vehicle. BACKGROUND

[0002] In the related art, the oil cooling lubrication structure of the dual-motor power assembly is an oil path always open structure, and oil is supplied to the stator and rotor of the dual-motor in all operating conditions of the vehicle, and the continuous oil supply to the non-working motor will cause waste of oil pump power consumption. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a lubrication system of an electric drive assembly, an electric drive assembly and a vehicle to solve the technical problems existing in the related art.

[0004] In order to achieve the above-mentioned purpose, according to a first aspect of the present disclosure, a lubrication system of an electric drive assembly is provided, comprising a main oil path, a drive motor oil path for lubricating a drive motor, a generator oil path for lubricating a generator, and at least one control valve for controlling the oil amount of lubricating oil,

[0005] The main oil path is connected with the drive motor oil path, and is connected with the generator oil path,

[0006] The control valve is arranged between the main oil path and at least one of the drive motor oil path and the generator oil path.

[0007] Optionally, the at least one control valve comprises a first valve, the generator oil path comprises a first oil path for lubricating a motor stator,

[0008] The inlet of the first valve is connected with the main oil path, and the outlet of the first valve is connected with the oil inlet end of the first oil path.

[0009] Optionally, the generator oil path further comprises a second oil path for lubricating a motor rotor,

[0010] The outlet of the first valve is further connected with the oil inlet end of the second oil path.

[0011] Optionally, the oil inlet end of the first oil path and the oil inlet end of the second oil path meet and communicate with the outlet of the valve port of the first valve.

[0012] Optionally, the lubrication system further comprises a spraying structure, the spraying structure is arranged in the first oil path, and the spraying structure is used for spraying oil to the motor stator.

[0013] Optionally, the at least one control valve further comprises a second valve,

[0014] The inlet of the second valve is connected with the main oil passage, and the outlet of the second valve is connected with the oil inlet end of the driving motor oil passage.

[0015] Optionally, the driving motor oil passage comprises a third oil passage for lubricating a stator of the driving motor and a fourth oil passage for lubricating a rotor of the driving motor,

[0016] The oil inlet end of the third oil passage and the oil inlet end of the fourth oil passage are connected with the outlet of the valve port of the second valve.

[0017] Optionally, the driving motor oil passage further comprises a fifth oil passage for lubricating a gear inside the driving motor, and the oil inlet end of the fifth oil passage, the oil inlet end of the third oil passage and the oil inlet end of the fourth oil passage are connected with the outlet of the valve port of the second valve.

[0018] Optionally, the control valve is an electromagnetic control valve.

[0019] According to a second aspect of the present disclosure, an electric drive assembly is provided, comprising a generator, a driving motor, a housing and a lubricating system of the electric drive assembly as described above,

[0020] The generator and the driving motor are installed in the housing.

[0021] According to a third aspect of the present disclosure, a vehicle is provided, comprising the electric drive assembly as described above.

[0022] Through the above technical solution, the control valve is arranged between the main oil passage and one or both of the driving motor oil passage for lubricating the driving motor and the generator oil passage for lubricating the generator, the control valve can control the oil amount of the lubricating oil, the control valve can cut off or reduce the oil supply to the electric motor which has stopped running, thereby reducing the oil pump power consumption, and the oil amount distribution of the multiple oil passages can be adjusted according to the actual running condition, so as to improve the endurance of the vehicle.

[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0025] Figure 1 is a schematic diagram of part of the structure of the electric drive assembly provided by an example embodiment of the present disclosure,

[0026] Figure 2 is a schematic diagram of part of the structure of the electric drive assembly provided by an example embodiment of the present disclosure, wherein the control valve is shown,

[0027] Figure 3 is a schematic diagram of an oil circuit of a lubrication system provided by an example embodiment of the present disclosure,

[0028] Figure 4 is a schematic diagram of an oil circuit of a lubrication system provided by another example embodiment of the present disclosure,

[0029] Figure 5 is a schematic diagram of an oil circuit of a lubrication system provided by yet another example embodiment of the present disclosure.

[0030] Explanation of Reference Signs

[0031] 100, electric drive assembly, 10, lubrication system, 11, main oil circuit, 12, drive motor oil circuit, 121, third oil circuit, 122, fourth oil circuit, 123, fifth oil circuit, 13, generator oil circuit, 131, first oil circuit, 132, second oil circuit, 14, control valve, 141, first valve, 142, second valve, 15, spraying structure, 16, recovery oil circuit, 20, housing. DETAILED DESCRIPTION

[0032] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0033] In the present disclosure, it is understood that, in the present disclosure, the orientation words such as "upper", "lower", etc. used to indicate the orientation or position relationship are defined based on the drawing direction shown in the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation configuration and operation, and therefore cannot be understood as a limitation on the present disclosure, and the terms "inner" and "outer" can refer to the inner and outer of the corresponding structure profile. The terms such as "first", "second", "third" and the like are used to distinguish one element from another element, and do not have sequentiality and importance. In addition, in the description with reference to the drawings, the same reference signs in different drawings represent the same elements.

[0034] In the description of the present disclosure, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0035] As Figures 1 to 5As shown, according to the first aspect of the present disclosure, a lubrication system 10 of an electric drive assembly is provided, comprising a main oil circuit 11, a drive motor oil circuit 12 for lubricating a drive motor, a generator oil circuit 13 for lubricating a generator, and at least one control valve 14 for controlling the oil amount of the lubricating oil, the main oil circuit 11 is connected with the drive motor oil circuit 12, and is connected with the generator oil circuit 13, and the main oil circuit 11 has the control valve 14 between at least one of the drive motor oil circuit 12 and the generator oil circuit 13.

[0036] The control valve 14 of the present disclosure can control the oil amount of the oil circuit, or can control the on-off of the oil circuit, which is not limited in the present disclosure. The at least one control valve 14 herein can include one or more, and can be arranged between the main oil circuit 11 and the generator oil circuit 13, or can be arranged between the main oil circuit 11 and the drive motor oil circuit 12, or can be arranged between the main oil circuit 11 and the generator oil circuit 13 and between the main oil circuit 11 and the drive motor oil circuit 12, at least one of which can be used to adjust the oil amount of the lubricating oil by the control valve 14 when not in use, to save energy consumption.

[0037] Through the above technical solution, the control valve 14 is arranged between the main oil circuit 11 and one or both of the drive motor oil circuit 12 for lubricating the drive motor and the generator oil circuit 13 for lubricating the generator, the control valve 14 can control the oil amount of the lubricating oil, the control valve 14 can cut off the oil supply to the stopped motor, or reduce the oil supply amount to the stopped motor, thereby reducing the oil pump power consumption on the main oil circuit 11, and the oil amount distribution of multiple oil circuits can be adjusted according to the actual operating condition, to improve the endurance of the vehicle and reduce the cost.

[0038] The main oil circuit 11, the drive motor oil circuit 12, and the generator oil circuit 13 are connected to form an oil circuit structure for containing lubricating oil, and the oil circuits are connected to each other, so that the lubricating oil can flow between the oil circuits to achieve the effects of lubrication and cooling. In the present disclosure, the control valve 14 can be arranged between the main oil circuit 11 and the generator oil circuit 13 and the drive motor oil circuit 12, so that the oil amount of the lubricating oil flowing from the main oil circuit 11 to the generator oil circuit 13 and the drive motor oil circuit 12 can be adjusted and distributed according to the actual operating condition, for example, when the generator and the drive motor are stopped, the control valve 14 can control the oil amount of the lubricating oil flowing from the main oil circuit 11 to the drive motor oil circuit 12, thereby reducing the power consumption of the oil pump on the main oil circuit 11, and saving the lubricating oil. Here, the oil pump of the main oil circuit 11 can provide power for the flow of the lubricating oil.

[0039] In the embodiment described above, where at least one control valve 14 includes a first valve 141, the generator oil circuit 13 of this disclosure may include a first oil circuit 131 for lubricating the engine stator. The inlet of the first valve 141 is connected to the main oil circuit 11, and the outlet of the first valve 141 is connected to the oil inlet of the first oil circuit 131. Thus, the first valve 141 between the main oil circuit 11 and the first oil circuit 131 can be used to control the amount of lubricating oil between the main oil circuit 11 and the first oil circuit 131. That is, when the generator is not running, the first valve 141 can reduce or cut off the amount of oil flowing from the main oil circuit 11 to the first oil circuit 131.

[0040] In some implementations, such as Figure 3 As shown, the first valve 141 is located between the main oil passage 11 and the first oil passage 131. When the generator is not in use, the first valve 141 cuts off or reduces the amount of lubricating oil flowing from the main oil passage 11 to the first oil passage 131. When the first valve 141 cuts off its oil passage, the lubricating oil can flow from the main oil passage 11 to the second oil passage 132, the third oil passage 121, the fourth oil passage 122, and the fifth oil passage 123 (described below), and then to the lubricating oil recovery oil passage 16 of the lubrication system 10. In the recovery oil passage 16, the lubricating oil can sequentially pass through the oil pan (e.g., the bottom of the outer casing 20), the coarse filter, the oil cooler, and the fine filter before returning to the main oil passage 11 for recycling. An oil pump on the oil passage is used to drive the flow of lubricating oil, and the oil pump can be located between the coarse filter and the oil cooler. Here, the main oil passage 11 may not supply oil to the first oil passage 131 to save energy. The oil pan can be used to hold lubricating oil. The coarse filter can perform the first filtration of the lubricating oil. In the case of a large amount of impurities, the first filtration can be performed multiple times to ensure the reliability of the recovered lubricating oil filtration. The oil cooler can reduce the temperature of the lubricating oil to ensure that the motor can be cooled during use. The fine filter is the second filtration, which can further reduce the impurities in the lubricating oil.

[0041] To enable the first valve 141 to simultaneously control the oil volume at the generator rotor, in this disclosure, the generator oil circuit 13 may further include a second oil circuit 132 for lubricating the generator rotor, and the outlet of the first valve 141 may be connected to the oil inlet of the second oil circuit 132. Thus, the first valve 141 between the main oil circuit 11 and the second oil circuit 132 can be used to control the amount of lubricating oil between the main oil circuit 11 and the second oil circuit; that is, the first valve 141 can also control the amount of oil flowing from the main oil circuit 11 to the second oil circuit 132.

[0042] In the present disclosure, the oil inlet end of the first oil passage 131 can be connected with the oil inlet end of the second oil passage 132 and communicated with the outlet of the valve port of the first valve 141. In this way, the first valve 141 can not only control the oil amount of the first oil passage 131 and the second oil passage 132 at the same time, but also save materials and space of the lubricating system, so as to improve the rationality of the connection of the first oil passage 131 and the second oil passage 132 with the first valve 141.

[0043] In some embodiments, as shown in Figure 4 The first valve 141 is arranged between the main oil passage 11 and the first oil passage 131 and the second oil passage 132. In the working condition of the generator being disabled, the first valve 141 can cut off or reduce the oil amount of the lubricating oil flowing from the main oil passage 11 to the first oil passage 131 and the second oil passage 132. When the first valve 141 cuts off the oil passage, the lubricating oil can flow from the main oil passage 11 to the third oil passage 121, the fourth oil passage 122 and the fifth oil passage 123, and then to the lubricating oil recovery passage 16 of the lubricating system 10. The main oil passage 11 can not supply oil to the first oil passage 131 and the second oil passage 132.

[0044] Optionally, the lubricating system 10 can further comprise a spraying structure 15 arranged in the first oil passage 131, and the spraying structure 15 is used for spraying oil to the engine stator. The arrangement of the spraying structure 15 can improve the uniformity of the lubricating oil of the first oil passage 131 sprayed to the generator stator, so as to avoid uneven distribution of the lubricating oil, and the spraying mode is also convenient for cooling the generator stator.

[0045] In the above-mentioned at least one control valve 14 further comprising the second valve 142, the inlet of the second valve 142 of the present disclosure can be connected with the main oil passage 11, and the outlet of the second valve 142 is connected with the oil inlet end of the drive motor oil passage 12. In this way, the second valve 142 between the main oil passage 11 and the drive motor oil can be used to control the oil amount of the lubricating oil between the main oil passage 11 and the drive motor oil, i.e. when the drive motor is not running, the second valve 142 can control the oil amount of the lubricating oil flowing from the main oil passage 11 to the drive motor oil.

[0046] In the present disclosure, the drive motor oil circuit 12 can include a third oil circuit 121 for lubricating the drive motor stator and a fourth oil circuit 122 for lubricating the drive motor rotor, the oil inlet end of the third oil circuit 121 and the oil inlet end of the fourth oil circuit 122 meet and are connected to the outlet of the valve port of the second valve 142. In this way, the second valve 142 can control the amount of oil in the third oil circuit 121 and the fourth oil circuit 122 at the same time, and after the oil inlet end of the third oil circuit 121 and the oil inlet end of the fourth oil circuit 122 meet, the outlet of the second valve 142 is connected, which is beneficial to save materials and save space of the lubrication system, and to improve the rationality of the arrangement of the connection of the third oil circuit 121 and the fourth oil circuit 122 with the second valve 142.

[0047] Optionally, the drive motor oil circuit 12 further includes a fifth oil circuit 123 for lubricating the gears inside the drive motor, the oil inlet end of the fifth oil circuit 123 meets the third oil circuit 121 and the fourth oil circuit 122 and is in communication with the outlet of the valve port of the second valve 142. In this way, the second valve 142 can also control the amount of oil in the fifth oil circuit 123, and the oil inlet end of the fifth oil circuit 123 also meets the oil inlet end of the third oil circuit 121 and the oil inlet end of the fourth oil circuit 122 before being connected to the outlet of the second valve 142, which is beneficial to save materials and save space of the lubrication system.

[0048] In some embodiments, as shown in Figure 5 The first valve 141 is arranged between the main oil circuit 11 and the first oil circuit 131 and the second oil circuit 132, and the second valve 142 is arranged between the main oil circuit 11 and the third oil circuit 121, the fourth oil circuit 122 and the fifth oil circuit 123.

[0049] In the generator-only shutdown operating condition, the first valve 141 can cut off the lubricating oil flowing from the main oil circuit 11 to the first oil circuit 131 and the second oil circuit 132, the second valve 142 is opened, the lubricating oil can flow from the main oil circuit 11 to the third oil circuit 121, the fourth oil circuit 122 and the fifth oil circuit 123 to the lubricating oil recovery circuit 16 of the lubrication system 10, and the main oil circuit 11 can not supply oil to the first oil circuit 131 and the second oil circuit 132.

[0050] In the drive motor-only shutdown operating condition, the second valve 142 can cut off the lubricating oil flowing from the main oil circuit 11 to the third oil circuit 121, the fourth oil circuit 122 and the fifth oil circuit 123, the first valve 141 is opened, the lubricating oil can flow from the main oil circuit 11 to the first oil circuit 131 and the second oil circuit 132 to the lubricating oil recovery circuit 16 of the lubrication system 10, and the main oil circuit 11 can not supply oil to the third oil circuit 121, the fourth oil circuit 122 and the fifth oil circuit 123.

[0051] In the working condition that both the generator and the driving motor are disabled, the first valve 141 cuts off the lubricating oil of the main oil path 11 flowing to the first oil path 131 and the second oil path 132, and the second valve 142 cuts off the lubricating oil of the main oil path 11 flowing to the third oil path 121, the fourth oil path 122 and the fifth oil path 123, at this time, the main oil path 11 can no longer supply oil to the first oil path 131, the second oil path 132, the third oil path 121, the fourth oil path 122 and the fifth oil path 123, so as to reduce energy consumption.

[0052] The control valve 14 of the present disclosure can be provided as an electromagnetic control valve, a pneumatic control valve, a hydraulic control valve or the like suitable structure, since the electromagnetic control valve has high precision, fast response and low energy consumption, and is convenient for remote control, therefore, the control valve 14 can be provided as an electromagnetic control valve here. In this way, it is convenient to open or close the electromagnetic valve according to the running working condition of the generator and the driving motor, the intelligent adjustment of the oil path is realized by using the electromagnetic control valve, the oil quantity distribution is reasonable, so as to realize the intelligent adjustment and accurate cooling of the oil path, and improve the cooling efficiency.

[0053] According to a second aspect of the present disclosure, an electric drive assembly 100 is provided, comprising a generator, a driving motor, a housing 20 and the lubricating system 10 of the electric drive assembly 100.

[0054] The lubricating system 10 in the present disclosure can comprise a plurality of communicating pipelines, which can be arranged inside or outside the housing 20, and the lubricating system 10 can further comprise a flow channel groove formed inside the housing 20 for circulating lubricating oil, which is not limited in the present disclosure.

[0055] As shown in Figure 1 and Figure 2 , the connection position of the first valve 141 can be bolted to the housing 20, the inlet and outlet of the first valve 141 extend into the inside of the housing 20 and are connected between the first oil path 131 and the main oil path 11, so as to ensure the rationality of the arrangement position of the first valve 141.

[0056] According to a third aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned electric drive assembly 100. The vehicle can be any vehicle suitable for using the above-mentioned electric drive assembly 100, for example, the vehicle can be a range-extended electric vehicle.

[0057] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-mentioned embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, which all belong to the protection scope of the present disclosure.

[0058] It should be further noted that various specific technical features described in the above specific embodiments can be combined in any suitable manner, and the disclosure will not be repeated here for various possible combinations.

[0059] In addition, various different embodiments of the disclosure can also be combined with each other as long as they do not contradict the idea of the disclosure, and they should also be considered as disclosed by the disclosure.

Claims

1. A lubrication system for an electric drive assembly, the lubrication system comprising: The main oil passage, a drive motor oil passage for lubricating a drive motor, a generator oil passage for lubricating a generator, and at least one control valve for controlling the amount of lubricating oil; The main oil passage is connected to the drive motor oil passage and to the generator oil passage; The control valve is arranged between the main oil passage and at least one of the drive motor oil passage and the generator oil passage.

2. The lubrication system of an electric drive assembly of claim 1, wherein, The at least one control valve comprises a first valve, and the generator oil passage comprises a first oil passage for lubricating a generator stator; An inlet of the first valve is connected to the main oil passage, and an outlet of the first valve is connected to an oil inlet end of the first oil passage.

3. The lubrication system of an electric drive assembly of claim 2, wherein, The generator oil passage further comprises a second oil passage for lubricating a generator rotor; The outlet of the first valve is further connected to an oil inlet end of the second oil passage.

4. The lubrication system of an electric drive assembly of claim 3, wherein, The oil inlet end of the first oil passage and the oil inlet end of the second oil passage meet and communicate with an outlet of a valve port of the first valve.

5. The lubrication system of an electric drive assembly of claim 2, wherein, The lubricating system further comprises a spraying structure arranged in the first oil passage, the spraying structure being used for spraying oil to the engine stator.

6. The lubrication system of an electric drive assembly according to any one of claims 1-5, characterized in that, The at least one control valve further comprises a second valve; An inlet of the second valve is connected to the main oil passage, and an outlet of the second valve is connected to an oil inlet end of the drive motor oil passage.

7. The lubrication system of an electric drive assembly of claim 6, wherein, The drive motor oil passage comprises a third oil passage for lubricating a drive motor stator and a fourth oil passage for lubricating a drive motor rotor; The oil inlet end of the third oil passage and the oil inlet end of the fourth oil passage meet and are connected to an outlet of a valve port of the second valve.

8. The lubrication system of an electric drive assembly of claim 7, wherein, The drive motor oil passage further comprises a fifth oil passage for lubricating gears in the drive motor, and an oil inlet end of the fifth oil passage, the oil inlet end of the third oil passage, and the oil inlet end of the fourth oil passage meet and communicate with the outlet of the valve port of the second valve.

9. The lubrication system of an electric drive assembly of claim 1, wherein, The control valve is an electromagnetic control valve.

10. An electric drive assembly, comprising: A lubricating system of an electric drive assembly, comprising a generator, a drive motor, a housing, and the lubricating system of any one of claims 1-9, The generator and the drive motor are installed in the housing.

11. A vehicle characterized by comprising: The electric drive assembly of claim 10.

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