High-speed oil cooling motor lubricating system

Abstract

The invention discloses a high-speed oil cooling motor lubricating system, and belongs to the technical field of extended-range automobile transmissions. Comprising an oil pool, a filter, a mechanical pump, an oil temperature control electromagnetic valve, an oil pressure control electromagnetic valve, a radiator and a cooling and lubricating branch, the mechanical pump is connected with an oil pool through a filter, an oil temperature control electromagnetic valve and an oil pressure control electromagnetic valve are arranged on a main oil way of the mechanical pump, one-way valves are arranged on branches of the mechanical pump, and throttling valves are arranged on the branches, leading to a motor, a gear, a bearing and an oil seal of the transmission, of the mechanical pump and used for distributing oil flow of the transmission. The mechanical pump, the temperature control valve, the pressure valve and the hollow shaft are forcibly lubricated in a lubricating oil way, the lubricating effect at the low rotating speed is guaranteed through forcible lubrication, and the problem of insufficient lubrication is solved. Meanwhile, an oil liquid control structure is optimized, a temperature control valve and a pressure valve are additionally arranged, the problem that an oil way system in the transmission cannot be accurately controlled is solved, the oil liquid utilization rate is increased, the structure is simple, and development and design are convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of range-extended automobile transmissions, and in particular relates to a high-speed oil-cooled motor lubrication system. Background Art

[0002] The cooling and lubricating oil circuit of the range-extended transmission currently on the market generally uses a mechanical pump to directly take power from the input shaft to provide cooling and lubricating oil for the motor stator, rotor, gears, bearings and oil seals.

[0003] The mechanical pump rotates with the transmission gears all the time. When the gear speed is low, the mechanical pump speed also decreases, and the output power also decreases. The motor rotor, bearings, gears and oil seals are all lubricated by hollow shaft oil throwing. When the gear speed in the transmission is low and the output power of the mechanical pump is small, the total amount of lubricating oil in the hollow shaft is small, the centrifugal force is also small, and the parts that rely on hollow shaft oil throwing lubrication can only get a small amount of lubricating oil. There is a risk of insufficient lubrication, which can cause the internal parts of the transmission to malfunction due to insufficient lubrication. At the same time, there is a lack of a system to monitor the oil temperature and pressure inside the transmission, and it is impossible to achieve precise control of the lubricating oil. Summary of the invention

[0004] In order to solve the above problems, the present invention further provides a high-speed oil-cooled motor lubrication system with high energy utilization rate, simple structure, easy control and low cost.

[0005] The technical solution adopted by the present invention is:

[0006] A high-speed oil-cooled motor lubrication system comprises an oil pool, a filter, a mechanical pump, an oil temperature control solenoid valve, an oil pressure control solenoid valve, a radiator and more than two cooling and lubrication branches; the mechanical pump is connected to the oil pool through the filter, an oil temperature control solenoid valve and an oil pressure control solenoid valve are arranged on the main oil circuit of the mechanical pump, a one-way valve is arranged on the branch circuit of the mechanical pump, and each branch circuit from the mechanical pump to the motor, gear, bearing and oil seal of the transmission is provided with a throttle valve for distributing the transmission oil flow.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] The lubricating oil circuit of the present invention is a mechanical pump, a temperature control valve, a pressure valve and a hollow shaft for forced lubrication. Forced lubrication ensures the lubrication effect at low speeds and solves the problem of insufficient lubrication. At the same time, the present invention optimizes the oil control structure, adds a temperature control valve and a pressure valve, solves the problem that the oil circuit system inside the transmission cannot be accurately controlled, increases the oil utilization rate, has a simple structure, and is easy to develop and design. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention;

[0010] Among them: 1. Oil pool; 2. Filter; 3. Mechanical pump; 4. Radiator. DETAILED DESCRIPTION

[0011] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0012] like Figure 1 As shown, the present invention provides a high-speed oil-cooled motor lubrication system, including an oil pool 1, a filter 2, a mechanical pump 3, an oil temperature control solenoid valve, an oil pressure control solenoid valve, a radiator 4 and more than two cooling and lubricating branches; the mechanical pump 3 is connected to the oil pool 1 through the filter 2, and the main oil circuit of the mechanical pump 3 is provided with an oil temperature control solenoid valve and an oil pressure control solenoid valve, and a one-way valve is provided on the branch of the mechanical pump 3, so that the oil provided by the mechanical pump 3 cannot flow back, so as to meet the cooling and lubrication requirements under different vehicle working conditions. Throttle valves are provided on each branch of the mechanical pump 3 leading to the motor, gear, bearing and oil seal of the transmission, which are used to distribute the transmission oil flow to achieve cooling and lubrication of the above parts.

[0013] The cooling and lubrication branches of the mechanical pump 3 are: L1 branch, L2 branch, L3 branch, L4 branch, L5 branch, L6 branch, L7 branch, L8 branch, L9 branch, L10 branch, L11 branch, L12 branch, L13 branch, and L14 branch;

[0014] The oil pressure control solenoid valve is connected to the A1 oil pressure control solenoid valve and the A3 oil pressure control solenoid valve;

[0015] The oil temperature control solenoid valve is A2 oil temperature control solenoid valve;

[0016] The one-way valves are D1 one-way valve and D2 one-way valve;

[0017] The throttle valves are J1 throttle valve, J2 throttle valve, J3 throttle valve and J4 throttle valve;

[0018] The filter 2 is used to filter metal chips in the transmission oil and is connected to the oil pool 1. The filter 2 is connected to the oil inlet of the mechanical pump 3 through the L1 branch.

[0019] The oil outlet of the mechanical pump 3 is connected to the oil inlet of the D1 one-way valve through the L2 branch, the oil outlet of the D1 one-way valve is connected to the A1 oil pressure control solenoid valve through the L3 branch, and the A1 oil pressure control solenoid valve is respectively connected to the oil inlets of the J1 throttle valve, the J2 throttle valve and the J3 throttle valve through the L5 branch; the oil outlet of the J1 throttle valve is connected to the oil seals of the transmission through the L6 branch and lubricates the oil seals, the oil outlet of the J2 throttle valve is connected to the bearings of the transmission through the L7 branch and lubricates the bearings, and the oil outlet of the J3 throttle valve is connected to the gears of the transmission through the L8 branch and lubricates the gears.

[0020] The oil return port of the A1 oil pressure control solenoid valve is connected to the L5 branch through the L4 branch.

[0021] The oil outlet of the mechanical pump 3 is connected to the oil inlet of the radiator 4 through the L9 branch, and the radiator 4 plays the role of cooling the transmission oil. The oil outlet of the radiator 4 is connected to the oil inlet of the D2 check valve through the L11 branch, and the oil outlet of the D2 check valve is connected to the A3 oil pressure control solenoid valve through the L12 branch. The A3 oil pressure control solenoid valve is connected to the motor through the L14 branch and lubricates the motor. The J4 throttle valve is arranged on the L14 branch.

[0022] The oil return port of the A3 oil pressure control solenoid valve is connected to the L14 branch through the L13 branch.

[0023] The oil outlet of the mechanical pump 3 is connected to the A2 oil temperature control solenoid valve through the L10 branch.

[0024] The L5 branch is a hollow shaft oil circuit. The hollow shaft is designed as a sealed shaft with an O-ring structure to ensure that the gears, bearings and oil seals can be lubricated by forced lubrication when the internal gears of the transmission rotate at low speeds.

[0025] When the A1 oil pressure control solenoid valve and the A3 oil pressure control solenoid valve detect that the pressure in the oil circuit is insufficient, they will adjust the valves to increase the flow of lubricating oil to ensure lubrication of all parts; when the A2 oil temperature control solenoid valve detects that the oil temperature in the oil pool is too high, it will also adjust the valves to increase the flow of lubricating oil and increase the output power of radiator 4 to ensure that the temperature of the lubricating oil is not too high.

[0026] When the car is moving backward, the input shaft in the transmission drives the mechanical pump 3 to reverse, and the oil inlet and outlet of the mechanical pump 3 are interchanged. At this time, the D1 check valve on the L3 branch ensures that the oil in the L3 branch does not flow back; the D2 check valve on the L11 branch ensures that the oil in the L11 branch does not flow back, preventing the oil reflux problem caused by the reverse rotation of the mechanical pump 3 when the car is moving backward.

[0027] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-speed oil-cooled motor lubrication system, characterized in that: The invention comprises an oil pool (1), a filter (2), a mechanical pump (3), an oil temperature control solenoid valve, an oil pressure control solenoid valve, a radiator (4) and two or more cooling and lubricating branches; the mechanical pump (3) is connected to the oil pool (1) via the filter (2); an oil temperature control solenoid valve and an oil pressure control solenoid valve are arranged on the main oil circuit of the mechanical pump (3); a check valve is arranged on the branch circuit of the mechanical pump (3); and each branch circuit of the mechanical pump (3) leading to the motor, gear, bearing and oil seal of the transmission is provided with a throttle valve for distributing the transmission oil flow.

2. A high-speed oil-cooled motor lubrication system according to claim 1, characterized in that: The filter (2) is connected to the oil inlet of the mechanical pump (3) via the L1 branch.

3. A high-speed oil-cooled motor lubrication system according to claim 1, characterized in that: The oil outlet of the mechanical pump (3) is connected to the oil inlet of the D1 check valve through the L2 branch, the oil outlet of the D1 check valve is connected to the A1 oil pressure control solenoid valve through the L3 branch, the A1 oil pressure control solenoid valve is respectively connected to the oil inlets of the J1 throttle valve, the J2 throttle valve and the J3 throttle valve through the L5 branch; the oil outlet of the J1 throttle valve is connected to the transmission oil seal through the L6 branch and lubricates the oil seal, the oil outlet of the J2 throttle valve is connected to the transmission bearing through the L7 branch and lubricates the bearing, and the oil outlet of the J3 throttle valve is connected to the transmission gear through the L8 branch and lubricates the gear.

4. A high-speed oil-cooled motor lubrication system according to claim 3, characterized in that: The oil return port of the A1 oil pressure control solenoid valve is connected to the L5 branch through the L4 branch.

5. A high-speed oil-cooled motor lubrication system according to claim 1, characterized in that: The oil outlet of the mechanical pump (3) is connected to the oil inlet of the radiator (4) via the L9 branch, the oil outlet of the radiator (4) is connected to the oil inlet of the D2 check valve via the L11 branch, the oil outlet of the D2 check valve is connected to the A3 oil pressure control solenoid valve via the L12 branch, the A3 oil pressure control solenoid valve is connected to the motor via the L14 branch and lubricates the motor, and a J4 throttle valve is arranged on the L14 branch.

6. A high-speed oil-cooled motor lubrication system according to claim 5, characterized in that: The oil return port of the A3 oil pressure control solenoid valve is connected to the L14 branch through the L13 branch.

7. A high-speed oil-cooled motor lubrication system according to claim 1, characterized in that: The oil outlet of the mechanical pump (3) is connected to the A2 oil temperature control solenoid valve via the L10 branch.

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