阅读说明：本技术 混合动力变速器油冷润滑系统 (Oil cooling lubricating system of hybrid power transmission ) 是由 郭星 洪波 罗会兵 李益华 张小波 廖梦琦 陈梅 赵诗鑫 王军民 李林 于 2021-07-23 设计创作，主要内容包括：本发明公开了混合动力变速器油冷润滑系统,第一支路的输出端与第一单向阀的输入端连接,第一单向阀的输出端与换热器的输入端连接,换热器通过主冷却润滑油道分别连接第一冷却润滑支路、第二冷却润滑支路、第三冷却润滑支路的输入端,第一冷却润滑支路的输出端与电机定子连接,第二冷却润滑支路的输出端与电机转子连接,第三冷却润滑支路的输出端与轴承子系统连接,电机定子与轴承子系统分别与回油路连接,第二支路的输出端与第二单向阀的输入端连接,第二单向阀的输出端与换热器连接,所述电机转子通过第四冷却润滑支路与电机定子连接,电机转子还通过第五冷却润滑支路与轴承子系统连接。本发明具有结构简单,驱动系统趋向于小型化的特点。(The invention discloses an oil-cooled lubricating system of a hybrid power transmission, wherein the output end of a first branch is connected with the input end of a first one-way valve, the output end of the first one-way valve is connected with the input end of a heat exchanger, the heat exchanger is respectively connected with the input ends of a first cooling and lubricating branch, a second cooling and lubricating branch and a third cooling and lubricating branch through a main cooling and lubricating oil channel, the output end of the first cooling and lubricating branch is connected with a motor stator, the output end of the second cooling and lubricating branch is connected with a motor rotor, the output end of the third cooling and lubricating branch is connected with a bearing subsystem, the motor stator and the bearing subsystem are respectively connected with an oil return channel, the output end of the second branch is connected with the input end of a second one-way valve, and the output end of the second one-way valve is connected with the heat exchanger, the motor rotor is connected with the motor stator through a fourth cooling and lubricating branch, and the motor rotor is further connected with the bearing subsystem through a fifth cooling and lubricating branch. The invention has the characteristics of simple structure and small driving system.)

1. An oil cooling lubricating system of a hybrid power transmission comprises an oil pan (1), a main oil way (L1), a filter (2), a mechanical pump (7), a gear set (8), a first check valve (10), a heat exchanger (6), a first branch (L3), a main cooling lubricating oil channel (L4), a first cooling lubricating branch (L41), a second cooling lubricating branch (L42), a third cooling lubricating branch (L43), a motor stator (17), a motor rotor (14), a bearing subsystem (15) and an oil return channel (L5), wherein one end of the main oil way (L1) is located in the oil pan (1), the input end of the filter (2) is connected with the other end of the main oil way (L1), the output end of the filter (2) is connected with the input end of the first branch (L3), the mechanical pump (7) is arranged on the first branch (L3), and the mechanical pump (7) is matched with the gear set (8), the output end of a first branch (L3) is connected with the input end of a first one-way valve (10), the output end of the first one-way valve (10) is connected with the input end of a heat exchanger (6), the heat exchanger (6) is respectively connected with a first cooling and lubricating branch (L41) through a main cooling and lubricating oil channel (L4), a second cooling and lubricating branch (L42) and the input end of a third cooling and lubricating branch (L43), the output end of the first cooling and lubricating branch (L41) is connected with a motor stator (17), the output end of the second cooling and lubricating branch (L42) is connected with a motor rotor (14), the output end of the third cooling and lubricating branch (L43) is connected with a bearing subsystem (15), and the motor stator (17) and the bearing subsystem (15) are respectively connected with an oil return path (L5), the hydraulic pump is characterized by further comprising a second branch (L2), an electronic pump (3), an oil pump motor (4), a second one-way valve (5), Fourth cooling and lubrication branch road (L421), fifth cooling and lubrication branch road (L422), the input and the output of filter (2) of second branch road (L2) are connected, electronic pump (3) set up on second branch road (L2), electronic pump (3) and oil pump motor (4) cooperation, the output and the input of second check valve (5) of second branch road (L2) are connected, the output and heat exchanger (6) of second check valve (5) are connected, electric motor rotor (14) are connected with motor stator (17) through fourth cooling and lubrication branch road (L421), and electric motor rotor (14) still are connected with bearing subsystem (15) through fifth cooling and lubrication branch road (L422).

2. The hybrid transmission oil-cooled lubrication system according to claim 1, wherein a first throttling hole (11) is formed in the first cooling and lubrication branch (L41), a second throttling hole (12) is formed in the second cooling and lubrication branch (L42), a third throttling hole (13) is formed in the third cooling and lubrication branch (L43), and a fourth throttling hole (16) is formed in the fifth cooling and lubrication branch (L422).

3. The hybrid power transmission oil-cooling lubrication system of claim 1, wherein when the electronic pump (3) stops working, the oil pump motor (4) drives the electronic pump (3) to work, the lubricating oil enters the second branch (L2) through the filter (2) via the main oil path (L1), the lubricating oil enters the heat exchanger (6) via the second check valve (5), the lubricating oil is cooled by the heat exchanger (6) and then distributed to the motor stator (17), the motor rotor (14) and the bearing subsystem (15) via the main cooling oil path (L4), the fourth cooling and lubricating branch (L421) entering the motor rotor (14) enters the motor stator (17) and enters the bearing subsystem (15) via the fifth cooling and lubricating branch (L422), the motor stator (17) is cooled, and the bearing subsystem (15) is lubricated, finally, the oil is collected in an oil return path (L5) and returned to the oil pan (1).

4. The hybrid transmission oil-cooled lubrication system according to claim 1, when the electronic pump (3) stops working, the gear set (8) drives the mechanical pump (7) to work, lubricating oil enters the first branch (L3) through the main oil way (L1) and the filter (2), the lubricating oil enters the heat exchanger (6) through the first check valve (10), the heat exchanger (6) cools the lubricating oil, the lubricating oil is distributed to a motor stator (17), a motor rotor (14) and a bearing subsystem (15) through a main cooling lubricating oil channel (L4), a fourth cooling lubricating branch (L421) entering the motor rotor (14) enters the motor stator (17), and into the bearing subsystem (15) through a fifth cooling and lubricating branch (L422), the motor stator (17) is cooled, the bearing subsystem (15) is lubricated, and finally the oil is collected into an oil return path (L5) and flows back to the oil pan (1).

5. The hybrid power transmission oil-cooling lubrication system of claim 1, wherein an oil pump motor (4) drives an electronic pump (3) to work, a gear set (8) drives a mechanical pump (7) to work, lubricating oil passes through a main oil path (L1) and a filter (2) to enter a first branch (L3) and a second branch (L2), the lubricating oil passes through a first check valve (10) to enter a heat exchanger (6), the lubricating oil passes through a second check valve (5) to enter the heat exchanger (6), the lubricating oil is cooled by the heat exchanger (6) and then distributed to a motor stator (17), a motor rotor (14) and a bearing subsystem (15) through a main cooling lubricating oil channel (L4), a fourth cooling lubricating branch (L421) entering the motor rotor (14) enters the motor stator (17) and enters the bearing subsystem (15) through a fifth cooling lubricating branch (L422), the motor stator (17) is cooled, the bearing subsystem (15) is lubricated, and finally the oil is collected into an oil return path (L5) and flows back to the oil pan (1).

Technical Field

The invention relates to the field of hybrid electric vehicles, in particular to an oil-cooled lubricating system of a hybrid power transmission.

Background

The traditional cooling and lubricating system of the hybrid power transmission is supplied with oil by an engine driving mechanical pump, and the oil is proportionally distributed to cooling and lubricating oil quantities of various subsystems such as a bearing, a gear, a motor and the like by a hydraulic module.

Most transmissions of hybrid vehicles use a water-cooled drive, and a water jacket is required inside a water-cooled drive motor to circulate coolant in the water jacket, but the cooling method has the following disadvantages: the motor can only cool the iron core, the stator winding with the largest heat productivity can not be directly cooled, the heat dissipation effect of the motor is poor, the motor efficiency is low, the same power is exerted, the flow of cooling liquid needs to be increased, the temperature of the cooling liquid needs to be reduced, the performance requirements of a water cooler and a water pump are increased, the volume of the water jacket is large, the weight is heavy, and the whole weight and the cost of the transmission are increased.

Disclosure of Invention

The invention provides an oil-cooled lubricating system of a hybrid power transmission, which has the characteristics of simple structure and tendency to miniaturization of a driving system.

The technical scheme for realizing the purpose is as follows:

the oil cooling lubrication system of the hybrid power transmission comprises an oil pan, a main oil way, a filter, a mechanical pump, a gear set, a first one-way valve, a heat exchanger, a first branch way and a main cooling lubrication oil way, wherein the first cooling lubrication branch way, the second cooling lubrication branch way, the third cooling lubrication branch way, a motor stator, a motor rotor, a bearing subsystem and an oil return way are arranged in the oil pan, one end of the main oil way is positioned in the oil pan, the input end of the filter is connected with the other end of the main oil way, the output end of the filter is connected with the input end of the first branch way, the mechanical pump is arranged on the first branch way, the mechanical pump is matched with the gear set, the output end of the first branch way is connected with the input end of the first one-way valve, the output end of the first one-way valve is connected with the input end of the heat exchanger, and the heat exchanger is respectively connected with the input ends of the first cooling lubrication branch way, the second cooling lubrication branch way and the third cooling lubrication branch way through the main cooling lubrication oil way, the output of first cooling lubrication branch road is connected with motor stator, the output and the motor rotor of second cooling lubrication branch road are connected, the output and the bearing subsystem of third cooling lubrication branch road are connected, motor stator and bearing subsystem are connected with back oil circuit respectively, still include the second branch road, the electronic pump, the oil pump motor, the second check valve, the fourth cooling lubrication branch road, the fifth cooling lubrication branch road, the input and the output of filter of second branch road are connected, the electronic pump sets up on the second branch road, the electronic pump cooperates with the oil pump motor, the output and the input of second check valve of second branch road are connected, the output and the heat exchanger of second check valve are connected, motor rotor is connected with motor stator through the fourth cooling lubrication branch road, motor rotor still is connected with the bearing subsystem through the fifth cooling lubrication branch road.

The invention simultaneously cools the motor system and the bearing subsystem through the electronic pump and the mechanical pump, controls the distribution of the lubricating oil through the throttling holes, has simple structure and simple control strategy, distributes the lubricating oil through each throttling hole without flow distribution of a hydraulic module, thus leading the invention to have small volume and low cost and well solving the defects of the existing cooling and lubricating system.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a cooling and lubrication circuit of the electronic pump when it is operated alone;

FIG. 3 is a cooling and lubrication circuit of the mechanical pump when it is operating alone;

FIG. 4 is a cooling and lubrication circuit in which the mechanical pump and the electronic pump are simultaneously operated;

reference numbers in the drawings:

the device comprises an oil pan 1, a filter 2, an electronic pump 3, an oil pump motor 4, a second one-way valve 5, a mechanical pump 7, a heat exchanger 6, a gear set 8, a first one-way valve 10, a first throttling hole 11, a second throttling hole 12, a third throttling hole 13, a motor rotor 14, a bearing subsystem 15, a fourth throttling hole 16 and a motor stator 17;

the main oil way L1, the first branch L3, the second branch L2, the main cooling and lubricating oil way L4, the oil return way L5, the first cooling and lubricating branch L41, the second cooling and lubricating branch L42, the third cooling and lubricating branch L43, the fourth cooling and lubricating branch L421 and the fifth cooling and lubricating branch L422.

Detailed Description

The present invention will be described with reference to the drawings.

Referring to fig. 1, the oil-cooled lubricating system of the hybrid transmission of the present invention includes an oil pan 1, a main oil path L1, a filter 2, a mechanical pump 7, a gear set 8, a first check valve 10, a heat exchanger 6, a first branch L3, a main cooling oil passage L4, a first cooling and lubricating branch L41, a second cooling and lubricating branch L42, a third cooling and lubricating branch L43, a motor stator 17, a motor rotor 14, a bearing subsystem 15, and an oil return path L5, wherein one end of the main oil path L1 is located in the oil pan 1, an input end of the filter 2 is connected to the other end of the main oil path L1, an output end of the filter 2 is connected to an input end of the first branch L3, the mechanical pump 7 is disposed on the first branch L3, the mechanical pump 7 is engaged with the gear set 8, an output end of the first branch L3 is connected to an input end of the first check valve 10, an output end of the first check valve 10 is connected to an input end of the heat exchanger 6, the heat exchanger 6 is respectively connected with the input ends of a first cooling and lubricating branch L41, a second cooling and lubricating branch L42 and a third cooling and lubricating branch L43 through a main cooling and lubricating oil passage L4, the output end of the first cooling and lubricating branch L41 is connected with the motor stator 17, the output end of the second cooling and lubricating branch L42 is connected with the motor rotor 14, the output end of the third cooling and lubricating branch L43 is connected with the bearing subsystem 15, and the motor stator 17 and the bearing subsystem 15 are respectively connected with an oil return passage L5.

Still include second branch road L2, electronic pump 3, oil pump motor 4, second check valve 5, fourth cooling lubrication branch road L421, fifth cooling lubrication branch road L422, the input of second branch road L2 is connected with the output of filter 2, electronic pump 3 sets up on second branch road L2, electronic pump 3 and the cooperation of oil pump motor 4, the output of second branch road L2 is connected with the input of second check valve 5, the output and the heat exchanger 6 of second check valve 5 are connected, electric motor rotor 14 is connected with motor stator 17 through fourth cooling lubrication branch road L421, electric motor rotor 14 still is connected with bearing subsystem 15 through fifth cooling lubrication branch road L422.

Preferably, a first orifice 11 is arranged on the first cooling and lubricating branch L41, a second orifice 12 is arranged on the second cooling and lubricating branch L42, a third orifice 13 is arranged on the third cooling and lubricating branch L43, and a fourth orifice 16 is arranged on the fifth cooling and lubricating branch L422. The first cooling/lubricating branch L41 is provided with a first orifice 11 for distributing the flow rate of the lubricating oil, the second cooling/lubricating branch L42 is provided with a second orifice 12 for distributing the flow rate of the lubricating oil, and the third orifice 13 is provided in the third cooling/lubricating branch L43 for distributing the flow rate of the lubricating oil.

In this embodiment, the gear set 8 is connected to a transmission shaft 9 of a vehicle, and the faster the transmission shaft 9 rotates, the faster the gear set 8 and the mechanical pump 7 rotate.

The structure can realize the following working modes:

the first mode is as follows:

as shown in fig. 2, when the electronic pump 3 stops working, the oil pump motor 4 drives the electronic pump 3 to work, the lubricating oil enters the second branch L2 through the filter 2 via the main oil path L1, the lubricating oil enters the heat exchanger 6 via the second one-way valve 5, the heat exchanger 6 cools the lubricating oil, and then the lubricating oil is distributed to the motor stator 17, the motor rotor 14 and the bearing subsystem 15 via the main cooling lubricating oil path L4, the fourth cooling lubricating branch L421 entering the motor rotor 14 enters the motor stator 17 and enters the bearing subsystem 15 via the fifth cooling lubricating branch L422, the motor stator 17 is cooled, the bearing subsystem 15 is lubricated, and finally the lubricating oil is collected to the oil return path L5 to flow back to the oil pan 1; since the first check valve 10 is disposed on the first branch L3, when the electronic pump 3 operates alone, the first check valve 10 prevents the lubricating oil in the heat exchanger 6 from entering the first branch L3.

The first mode is usually in a working condition of stopping to generate power, and the engine is required to be started to drive the generator to charge.

And a second mode:

as shown in fig. 3, when the electronic pump 3 stops working, the transmission shaft 9 drives the gear set 8 to rotate, the gear set 8 drives the mechanical pump 7 to work, the lubricating oil enters the first branch line L3 through the main oil path L1 via the filter 2, the lubricating oil enters the heat exchanger 6 via the first one-way valve 10, the lubricating oil is cooled by the heat exchanger 6, and then is distributed to the motor stator 17, the motor rotor 14 and the bearing subsystem 15 via the main cooling lubricating oil passage L4, the lubricating oil enters the motor stator 17 via the fourth cooling lubricating branch line L421 in the motor rotor 14, and enters the bearing subsystem 15 via the fifth cooling lubricating branch line L422, so as to cool the motor stator 17, lubricate the bearing subsystem 15, and finally, the lubricating oil is collected to the oil return path L5 and flows back to the oil pan 1. Since the second check valve 5 is disposed on the second branch L2, when the mechanical pump 7 operates alone, the second check valve 5 prevents the lubricating oil in the heat exchanger 6 from entering the second branch L2.

Mode two is typically during vehicle travel.

And a third mode:

as shown in fig. 4, when the oil pump motor 4 drives the electronic pump 3 to operate, the transmission shaft 9 drives the gear set 8 to rotate, the gear set 8 drives the mechanical pump 7 to operate, the lubricating oil enters the first branch L3 and the second branch L2 through the main oil passage L1, the lubricating oil enters the heat exchanger 6 through the first check valve 10, the lubricating oil enters the heat exchanger 6 through the second check valve 5, the lubricating oil is cooled by the heat exchanger 6 and then distributed to the motor stator 17, the motor rotor 14 and the bearing subsystem 15 through the main cooling lubricating oil passage L4, the lubricating oil enters the fourth cooling lubricating branch L421 in the motor rotor 14, enters the motor stator 17 and enters the bearing subsystem 15 through the fifth cooling lubricating branch L422 to cool the motor stator 17, the bearing subsystem 15 is lubricated, and finally flows back to the oil return passage L5 to the oil pan 1.

And a third mode: the main operation mode of the vehicle is that the flow rate of the lubricating oil in the first branch L3 is controlled by the vehicle speed, the higher the vehicle speed is, the larger the flow rate is, the flow rate of the lubricating oil in the second branch L2 is controlled by the oil pump motor 4, the higher the rotation speed of the oil pump motor 4 is, the larger the flow rate is, when the flow rate of the lubricating oil in the first branch L3 is insufficient, the rotation speed of the oil pump motor 4 can be increased to increase the flow rate of the lubricating oil in the second branch L2, so as to supplement the shortage of the flow rate of the lubricating oil in the first branch L3.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and the patent scope of the present invention is not limited; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.