High-speed oil cooling motor lubricating system

Abstract

The utility model 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 a low rotating speed is guaranteed through forced 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 added, 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] This utility model belongs to the technical field of range-extended vehicle transmissions, specifically relating to a high-speed oil-cooled motor lubrication system. Background Technology

[0002] Currently, the cooling and lubrication circuits of range extender transmissions on the market generally use a mechanical pump to directly draw 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 continuously with the gearbox gears. When the gear speed is low, the mechanical pump speed also decreases, resulting in reduced output power. The motor rotor, bearings, gears, and oil seals are all lubricated by air jetting from a hollow shaft. When the gear speed inside the gearbox is low and the mechanical pump output power is low, the total amount of lubricating oil in the hollow shaft is small, and the centrifugal force is also low. Therefore, the parts lubricated by air jetting from the hollow shaft receive very little lubrication, posing a risk of insufficient lubrication. This can lead to malfunctions in internal gearbox components due to insufficient lubrication. Furthermore, the gearbox lacks a system for monitoring oil temperature and pressure, making precise control of the lubricating oil impossible. Utility Model Content

[0004] In order to solve the above problems, this utility model provides a high-speed oil-cooled motor lubrication system that has high energy utilization, simple structure, easy control, and low cost.

[0005] The technical solution adopted by this utility model is:

[0006] A high-speed oil-cooled motor lubrication system includes an oil sump, a filter, a mechanical pump, an oil temperature control solenoid valve, an oil pressure control solenoid valve, a radiator, and two or more cooling and lubrication branches. The mechanical pump is connected to the oil sump through the filter. The main oil line of the mechanical pump is equipped with an oil temperature control solenoid valve and an oil pressure control solenoid valve. One-way valves are installed on the branches of the mechanical pump. Throttle valves are installed on each branch of the mechanical pump leading to the motor, gears, bearings, and oil seals of the transmission to distribute the transmission oil flow.

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

[0008] The lubrication circuit of this invention utilizes a mechanical pump, a temperature control valve, a pressure valve, and a hollow shaft for forced lubrication. Forced lubrication ensures effective lubrication at low speeds, solving the problem of insufficient lubrication. Simultaneously, this invention optimizes the oil control structure by adding a temperature control valve and a pressure valve, resolving the issue of inaccurate control of the transmission's internal oil circuit system. This results in higher oil utilization, a simpler structure, and ease of development and design. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] The components include: 1. oil tank; 2. filter; 3. mechanical pump; and 4. radiator. Detailed Implementation

[0011] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model will be provided below with reference to the accompanying drawings.

[0012] like Figure 1 As shown, this utility model provides a high-speed oil-cooled motor lubrication system, including an oil sump 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 lubrication branches. The mechanical pump 3 is connected to the oil sump 1 through the filter 2. An oil temperature control solenoid valve and an oil pressure control solenoid valve are installed on the main oil line of the mechanical pump 3. One-way valves are installed on the branches of the mechanical pump 3 to prevent backflow of the oil supplied by the mechanical pump 3, thus meeting the cooling and lubrication requirements under different vehicle operating conditions. Throttling valves are installed on each branch of the mechanical pump 3 leading to the motor, gears, bearings, and oil seals of the transmission to distribute the transmission oil flow and achieve cooling and lubrication of these components.

[0013] The cooling and lubrication branches of 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 hydraulic control solenoid valves are connected to A1 and A3 hydraulic control solenoid valves.

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

[0016] The check valves are D1 check valve and D2 check valve;

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

[0018] The filter 2 serves to filter metal shavings in the transmission fluid and is connected to the oil sump 1. The filter 2 is connected to the oil inlet of the mechanical pump 3 through the L1 branch.

[0019] The outlet of the mechanical pump 3 is connected to the inlet of the D1 check valve via branch L2. The outlet of the D1 check valve is connected to the A1 oil pressure control solenoid valve via branch L3. The A1 oil pressure control solenoid valve is connected to the inlets of the J1 throttle valve, J2 throttle valve, and J3 throttle valve via branch L5. The outlet of the J1 throttle valve is connected to each oil seal of the transmission via branch L6 and lubricates the oil seal. The outlet of the J2 throttle valve is connected to each bearing of the transmission via branch L7 and lubricates the bearing. The outlet of the J3 throttle valve is connected to each gear of the transmission via branch L8 and lubricates the gear.

[0020] The return port of the A1 hydraulic control solenoid valve is connected to the L5 branch via the L4 branch.

[0021] The outlet of the mechanical pump 3 is connected to the inlet of the radiator 4 via branch L9. The radiator 4 serves to cool the transmission fluid. The outlet of the radiator 4 is connected to the inlet of the D2 check valve via branch L11. The outlet of the D2 check valve is connected to the A3 hydraulic pressure control solenoid valve via branch L12. The A3 hydraulic pressure control solenoid valve is connected to the electric motor via branch L14 and lubricates the electric motor. A throttle valve J4 is installed on branch L14.

[0022] The return port of the A3 hydraulic control solenoid valve is connected to the L14 branch via the L13 branch.

[0023] The oil outlet of the mechanical pump 3 is connected to the A2 oil temperature control solenoid valve via 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 the lubrication effect of each gear, bearing and oil seal when the gears inside the transmission rotate at low speed by forced lubrication.

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

[0026] When the car is moving backwards, the input shaft inside 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 will not flow back; the D2 check valve on the L11 branch ensures that the oil in the L11 branch will not flow back, thus preventing the oil backflow problem caused by the reverse rotation of the mechanical pump 3 when the car is moving backwards.

[0027] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A high speed oil cooled electric machine lubrication system characterized by: The application relates to a transmission oil cooling and lubricating system, which comprises an oil pool (1), a filter (2), a mechanical pump (3), an oil temperature control electromagnetic valve, an oil pressure control electromagnetic valve, a radiator (4) and two or more cooling and lubricating branches; the mechanical pump (3) is connected with the oil pool (1) through the filter (2), the oil temperature control electromagnetic valve and the oil pressure control electromagnetic valve are arranged on a main oil path of the mechanical pump (3), one-way valves are arranged on branches of the mechanical pump (3), throttle valves are arranged on each branch of the mechanical pump (3) leading to a motor, gears, bearings and oil seals of a transmission, and are used for distributing transmission oil flow.

2. A high speed oil cooled electric machine lubrication system as claimed in claim 1, characterized in that: The filter (2) is connected with an oil inlet of the mechanical pump (3) through an L1 branch.

3. A high speed oil cooled electric machine lubrication system as claimed in claim 1, characterized in that: An oil outlet of the mechanical pump (3) is connected with an oil inlet of a D1 one-way valve through an L2 branch, an oil outlet of the D1 one-way valve is connected with an A1 oil pressure control electromagnetic valve through an L3 branch, the A1 oil pressure control electromagnetic valve is connected with oil inlets of J1, J2 and J3 throttle valves through an L5 branch; an oil outlet of the J1 throttle valve is connected with a transmission oil seal through an L6 branch and lubricates the oil seal, an oil outlet of the J2 throttle valve is connected with each bearing of the transmission through an L7 branch and lubricates the bearing, and an oil outlet of the J3 throttle valve is connected with each gear of the transmission through an L8 branch and lubricates the gear.

4. A high speed oil cooled electric machine lubrication system as claimed in claim 3, characterized in that: An oil return port of the A1 oil pressure control electromagnetic valve is connected with the L5 branch through an L4 branch.

5. A high speed oil cooled electric machine lubrication system as recited in claim 1, characterized by: An oil outlet of the mechanical pump (3) is connected with an oil inlet of the radiator (4) through an L9 branch, an oil outlet of the radiator (4) is connected with an oil inlet of a D2 one-way valve through an L11 branch, an oil outlet of the D2 one-way valve is connected with an A3 oil pressure control electromagnetic valve through an L12 branch, the A3 oil pressure control electromagnetic valve is connected with the motor through an L14 branch and lubricates the motor, and a J4 throttle valve is arranged on the L14 branch.

6. A high speed oil cooled electric machine lubrication system as claimed in claim 5, characterized in that: An oil return port of the A3 oil pressure control electromagnetic valve is connected with the L14 branch through an L13 branch.

7. A high speed oil cooled electric machine lubrication system as claimed in claim 1, characterized by: An oil outlet of the mechanical pump (3) is connected with an A2 oil temperature control electromagnetic valve through an L10 branch.

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