Intelligent thin oil lubrication system for gearbox test

Abstract

The invention discloses an intelligent thin oil lubrication system for gearbox testing. An oil tank is connected with multiple groups of oil supply systems and oil return systems; each oil supply system is provided with two oil supply pumps connected in parallel, filters are connected behind the oil supply pumps, water coolers are connected behind the filters, the water coolers are communicated with oil ways leading to oil supply ports of the speed reducers, oil supply pressure transmitters are arranged on the oil ways leading to the oil supply ports of the speed reducers, and mixed flow valves are arranged at outlet ends of the water coolers. Each oil return system comprises two oil return pumps which are connected in parallel, and inlets of the oil return pumps are connected with an oil way from an oil outlet of the reduction gearbox; a standby high-level oil tank is arranged above the speed reducer and is connected with an oil supply port of the speed reducer through a pneumatic valve; the lubricating system adjusts the rotating speed of a motor of the oil pumping pump in real time, and the intelligent, visual and data recording functions of the thin oil lubricating system are achieved through the programmable controller, the touch screen and the industrial personal computer. The oil temperature is stable, the oil pressure is stable, and the lubricating performance is improved.

Description

Technical Field

[0001] The invention relates to an intelligent thin oil lubrication system for gear box testing. Background Art

[0002] Gearboxes are crucial components in mechanical transmissions and are widely used in various types of machinery. For gearbox manufacturers, with a growing variety of specifications and increasingly powerful gearboxes, selecting a lubrication test system with a wide range of adjustable flow rates can undoubtedly reduce the test system's footprint and operating costs. Gearbox lubrication testing can collect data such as pressure, flow, and temperature, which is crucial for determining the required lubrication parameters for the gearbox, ensuring its proper operation, and extending its service life. Existing intelligent thin oil lubrication systems for gearbox testing have deficiencies in controlling oil temperature and pressure, requiring further improvement. Summary of the Invention

[0003] The object of the present invention is to provide an intelligent thin oil lubrication system for gearbox testing, which can achieve stable oil temperature and oil pressure and improve lubrication performance.

[0004] The technical solution of the present invention is: An intelligent thin oil lubrication system for gearbox testing includes an oil tank, which is characterized in that: the oil tank is connected to multiple oil supply systems and oil return systems; each oil supply system has two parallel oil supply pumps, one for use and one for backup, the oil supply pump is connected to a filter, the filter is connected to a water cooler, the water cooler is connected to an oil circuit leading to the oil supply port of the reducer, an oil supply pressure transmitter is provided on the oil circuit leading to the oil supply port of the reducer, a mixing valve is provided at the outlet end of the water cooler, and the mixing valve is connected to the inlet end of the water cooler through the mixed oil circuit; each oil return system includes two parallel return oil pumps, the return pump inlet is connected to the oil supply port from the reducer The oil circuit of the gearbox oil outlet is connected, the return oil pump is connected to the filter, and the filter is connected to the return oil circuit leading to the oil tank; the oil circuit from the gearbox oil outlet is provided with an oil return temperature sensor; a spare high-level oil tank is provided above the reducer, and the high-level oil tank is connected to the reducer oil supply port through a pneumatic valve; the lubrication system adjusts the motor speed of the oil pump in real time to achieve a balance between the oil supply and oil extraction flow, thereby realizing the stability of the oil level in the gearbox; through the programmable controller, touch screen, and industrial computer, the intelligent, visual, and data recording functions of the thin oil lubrication system are realized.

[0005] A temperature sensor is provided at the outlet of the water cooler.

[0006] The system has the following working modes: Internal circulation mode: the oil supply pump draws oil from the oil tank and returns it to the oil tank through the main oil pump circuit of the flushing unit; Filling mode: The oil supply pump draws oil from the oil tank, passes through the main oil pump circuit of the flushing unit, and then quantitatively fills it into the gearbox; this mode can be used to extract the oil in the oil tank when necessary; Flushing mode A: The oil pump draws oil from the gearbox back to the oil tank, and the oil supply pump draws oil from the oil tank and flushes and lubricates the gearbox through the flushing unit, completing the entire cycle; Flushing mode B: The oil supply pump draws oil from the gearbox and lubricates the gearbox through the flushing unit. The gearbox lubricating oil is connected to the flushing unit oil suction port through a pipeline, and the gearbox is filtered and lubricated repeatedly. 5) Oil pumping mode: suck oil from the gearbox, pass through the flushing unit and return to the oil tank; this mode can be used to replenish the oil tank when necessary; The entire gas station is controlled by PLC. The operating mode is selected, the working status is checked, and the working parameters are controlled through the touch screen. There is a communication interface with the host computer, and the local operation or central control operation is selected through the conversion switch. Internal circulation mode: set the circulation flow rate and manually control start / stop; Filling mode: Provide the oil filling amount that meets the test conditions through feedback control of accumulated oil volume or oil level; Flushing mode A: Set the flushing flow rate and flush at a constant flow rate and temperature based on feedback from the flow meter and temperature sensor. Different flow rates activate different numbers of oil supply and oil extraction pumps. The oil extraction pump automatically adjusts the flow rate to ensure that the gearbox oil level does not overflow and the oil extraction pump does not suck empty oil. Flushing mode B: Set the flushing flow rate and flush at a constant flow rate and temperature through feedback from the flow meter and temperature sensor; different flow rates will start different numbers of oil supply pumps; Pumping mode: Set flow rate and manually control start / stop; the oil collecting pipe is equipped with a liquid level transmitter; the pump will automatically stop when the oil pumping volume is too low to prevent the pump from running dry; The temperature control module is relatively independent and provides a temperature that meets the test conditions based on the feedback signal from the temperature sensor.

[0007] The intelligent thin oil lubrication control system for gearbox testing is divided into two subsystems: Unit 1 and Unit 2. The two units are independent of each other. To enable simultaneous testing of two gearboxes without affecting each other, the two units can be combined and used when necessary to meet the needs of testing larger flow rates. By selecting different units and the number of oil pumps, a wide range ratio test range of 1:18 for oil flow can be achieved; When only 1# pump or 2# pump is selected, the selected pump is the flow closed-loop adjustment pump; When 1# pump and 2# pump are selected at the same time, 2# pump is set as flow closed-loop adjustment pump by default; The two subsystems have the same functions, including: (1) Selection of control mode Each subsystem includes three control modes: debugging, local cabinet, and remote, which are realized through the conversion switch on the cabinet door; 1) Debug mode The subsystem is in manual operation state, and all operations are completed on the on-site touch screen; The oil pump variable frequency motor, electric heater, pneumatic ball valve, and pneumatic regulating valve on the subsystem can be independently controlled to start and stop; This mode is mainly used for initial signal debugging and later equipment inspection and maintenance; 2) This cabinet mode The subsystem is in automatic operation and all operations are completed on the on-site touch screen; By switching the pneumatic ball valve and adjusting the oil circuit, the subsystem can switch the pump group between various working modes: self-circulation mode, filling mode, flushing "oil tank" mode, flushing "no oil tank" mode, and oil extraction mode; The subsystem detects the oil tank temperature, controls the start and stop of the oil tank electric heater, adjusts the oil temperature according to the gearbox test conditions, and is used for self-circulation and flushing "oil tank" modes.

[0008] The subsystem detects the pipeline temperature, controls the start and stop of the pipeline electric heater, adjusts the oil temperature according to the gearbox test conditions, and is used for self-circulation and flushing "tankless" mode.

[0009] The subsystem detects the oil flow rate and adjusts the speed of the variable frequency oil pump motor. It also adjusts the oil pump flow rate according to the gearbox test conditions. It is used for flushing the "oil tank" and flushing the "no oil tank" modes. The subsystem controls the start and stop of the oil supply pump motor through oil supply flow pulse or liquid level detection, accurately filling the gearbox or high-level oil tank for filling mode; The subsystem detects the liquid level in the gearbox and the return oil collecting pipe, adjusts the speed of the variable frequency oil pump motor, and controls the liquid level in the gearbox and the return oil collecting pipe within a safe range, which is used for flushing the "oil tank" mode; The subsystem controls the start and stop of the oil pump motor by detecting the liquid level of the oil return collecting pipe, and pumps the test oil into the oil tank for use in the oil pumping mode; The subsystem detects the oil supply temperature and adjusts the opening of the cooling water pneumatic control valve or the oil circuit pneumatic mixing valve. It also adjusts the oil supply temperature according to the gearbox test conditions. This is used for flushing the "oil tank" and flushing the "no oil tank" modes. The pneumatic control valve can be forced to perform manual setting operations in automatic mode. The subsystem controls the start and stop of the emergency pneumatic ball valve by detecting the oil supply pressure and is used in conjunction with the UPS power supply system. When the oil supply pressure is lower than the emergency pressure setting value, the emergency pneumatic ball valve opens and the oil in the high-level oil tank is injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox. 3) Remote mode The subsystem is in automatic operation, and all operations are completed on the computer in the centralized control room; All functions implemented in this mode are consistent with those in the local mode.

[0010] The following is the display screen on the central large screen of the centralized control room, which shows the status of two units at the same time.

[0011] Includes a touch screen, touch screen features include: After the touch screen is powered on, the project file will be automatically started, and the "System Home Page" interface will be displayed after the startup is completed; ①The "System Home" interface mainly displays project information. Click the "Enter System" button in the lower right corner to enter the "Device Status" interface; Click the menu bar button above the "Device Status" interface to enter the corresponding sub-screen, including: device status, manual monitoring, local cabinet monitoring, remote monitoring, alarm list, trend curve, parameter setting, and realize the corresponding manual / automatic operation; The "Device Status" interface displays the circuit principle and device status of the intelligent thin oil lubrication system for gearbox testing; ② When in the "debugging" mode, the "manual monitoring" interface serves as the on-site operation interface of the intelligent thin oil lubrication system for gearbox testing, and is used to individually control each actuator; ③ When the "this cabinet monitoring" interface is in the "this cabinet" mode, it serves as the on-site operation interface of the intelligent thin oil lubrication system for gearbox testing; In the lower right corner of the "Current Cabinet Monitoring" interface is the switch button for "Pump Group Mode Selection". When you click this button, the "Mode Selection Interface" will pop up; click this button again to close the "Mode Selection Interface"; Below the "Current Cabinet Monitoring" interface is the "Operation Interface" button. By clicking this button, you can enter the operation interface of different modes; a) Self-circulation operation interface In the self-circulation mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch, and the control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state.

[0012] Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be used, and enter the required flow rate in the "Flow Rate" input box. When the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the self-circulation program; Step 4: Click the "Stop" button of the oil system, and the control system will stop driving the entire system; b) Filling operation interface In filling mode, according to the gearbox test outline, you can choose to fill the high-level oil tank or the gearbox. Follow the steps below: I. Gearbox filling operation: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Enter the required oil volume in the "Fuel Volume Given" input box; Step 3: Use the selector switch to confirm whether to fill the gearbox or the high-level tank; when the selector switch displays "Fill high-level tank", it means filling the gearbox; enter the desired oil level value in the "Oil level setting" input box of the gearbox; Step 4: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 5: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the gearbox filling procedure; Step 6: When the oil filling amount or the gearbox oil level is higher than the set value, or the oil system "Stop" button is clicked, the control system will stop driving the entire system; II. High-level fuel tank filling operation: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Enter the required oil volume in the "Fuel Volume Given" input box; Step 3: Use the selector switch to confirm whether to fill the gearbox or the high-level tank; when the selector switch displays "Gearbox Fill", it means filling the high-level tank; enter the desired oil level value in the "Oil Level Set" input box of the high-level tank; Step 4: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 5: Click the "Open" button of the emergency ball valve, and the control system will open the emergency pneumatic ball valve of the high-level fuel tank; Step 6: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the high-level oil tank filling procedure; Step 7: When the oil filling amount or the oil level in the high-level oil tank is higher than the set value, or the "Stop" button of the oil system is clicked, the control system will stop driving the entire system; Step 8: Click the "Close" button of the emergency ball valve, and the control system will close the emergency pneumatic ball valve of the high-level fuel tank to prepare for subsequent test operations; c) Flush "Oil Tank" operation interface In flushing A mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Enable / Disable" switch for the flushing pump flow closed loop; when the "Enable / Disable" switch displays "Disable", it means that the automatic flow adjustment function of the flushing pump is in use. The control program will automatically adjust the speed of the variable frequency flushing pump according to the flow detected by the oil supply flow meter to stabilize the flow required for the test; Step 4: Click "Next Page" to enter the oil well pump operation interface; Step 5: Select the number of oil well pumps to be put into use through the "Enable / Disable" switch of the oil well pump, and enter the required flow rate in the "Flow Rate Setting" input box; when the "Enable / Disable" switch displays "Disable", it means that the oil well pump is put into use; Step 6: Enter the liquid level value to be controlled in the "Gearbox and Return Oil Pipe Liquid Level" input box; the upper limit of the gearbox liquid level is set to ensure that the lubricating oil does not overflow the gearbox; the lower limit of the return oil pipe liquid level is set to ensure that the oil pump does not suck dry; Step 7: Click the "Enable / Disable" switch for the oil well pump level flow compensation. When the "Enable / Disable" switch displays "Disable", it means that the automatic flow adjustment function of the oil well pump is in use. Ensure that the liquid level of the gear box and the return oil pipe is within the set range. Step 8: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the flushing "oil tank" mode procedure; Step 9: When the oil supply flow is stable, enter the emergency ball valve start pressure value in the "Pressure Setting" input box of the high-level oil tank. Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Disable", it means that the emergency ball valve function is in use. When the oil supply pressure is lower than the emergency ball valve start pressure value, the emergency ball valve will automatically open, and the oil in the high-level oil tank will be injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox; Step 10: Click the "Stop" button of the oil system, and the control system will stop the entire oil system; Step 11: Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Enable", it means that the emergency ball valve has been turned off; d) Flush the "no oil tank" operation interface In flushing B mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Enable / Disable" switch for the flushing pump flow closed loop. When the "Enable / Disable" switch displays "Disable," the automatic flow adjustment function of the flushing pump is in use. The control program will automatically adjust the speed of the variable frequency flushing pump based on the flow detected by the oil flow meter to stabilize the flow required for the test. Step 4: Click the "Start" button of the oil system, and the control system will automatically drive the oil system to perform the flushing "no oil tank" mode procedure; Step 5: When the oil flow stabilizes, enter the emergency ball valve start pressure value in the "Pressure Setting" input box of the high-level oil tank. Click the "Enable / Disable" switch of the emergency ball valve. When the "Enable / Disable" switch displays "Disable", it means that the emergency ball valve function is in use. When the oil supply pressure is lower than the emergency ball valve start pressure value, the emergency ball valve will automatically open, and the oil in the high-level oil tank will be injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox; Step 6: Click the "Stop" button of the oil system, and the control system will stop the entire oil system; Step 7: Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Enable", it means that the emergency ball valve has been turned off; e) Oil pumping operation interface In the pumping mode, according to the gearbox test outline, follow the steps below: Step 1: Enter the desired oil level in the "Oil Level Given" input box of the oil collecting pipe; Step 2: Select the number of oil well pumps to be put into use through the "Enable / Disable" switch of the oil well pump, and enter the required flow rate in the "Flow Rate Setting" input box; when the "Enable / Disable" switch displays "Disable", it means that the oil well pump is put into use; Step 3: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the oil pumping procedure; Step 4: When the oil level in the oil collecting pipe is lower than the set value, or the "Stop" button of the oil system is clicked, the control system will stop driving the entire system; f) Temperature control operation interface The temperature control interface is valid in any pump group mode and is used to control the oil tank temperature, flushing pump suction temperature, and oil supply temperature according to the test outline. Follow the steps below: Fuel tank temperature control operation: Step 1: Enter the temperature control range in the "Start Temperature" and "Stop Temperature" input boxes of the fuel tank oil temperature; Step 2: Click the "Start" button for fuel tank temperature control, and the control system will automatically execute the fuel tank temperature control logic to ensure that the fuel tank temperature is within the test requirements; Step 3: Click the "Stop" button of the fuel tank temperature control, and the control system will stop executing the fuel tank temperature control logic; Flushing pump oil suction temperature control operation: Step 1: Enter the temperature control range in the "Start Temperature" and "Stop Temperature" input boxes of the flushing pump oil suction temperature; Step 2: Click the "Start" button for the flushing pump oil suction temperature control, and the control system will automatically execute the flushing pump oil suction temperature control logic to ensure that the flushing pump oil suction temperature is within the test requirements.

[0013] Step 3: Click the "Stop" button of the flushing pump oil suction temperature control, and the control system will stop executing the flushing pump oil suction temperature control logic; Oil supply temperature control operation: Step 1: Enter the oil supply temperature required for the test in the oil supply "temperature setting" input box; Step 2: Select the working mode of the valve through the "Automatic Adjustment / Forced Manual" switch of the cooling water pneumatic control valve; when the "Automatic Adjustment / Forced Manual" switch displays "Automatic Adjustment", it means that the valve is in the forced manual state. Enter the forced opening value in the "Forced Manual Opening Setting" input box; when the "Automatic Adjustment / Forced Manual" switch displays "Forced Manual", it means that the valve is in the automatic adjustment state. The control system will automatically adjust the opening of the cooling water pneumatic control valve according to the oil supply temperature feedback value, change the cooling water volume, and stabilize the oil supply temperature required for the test; Step 3: Select the working mode of the pneumatic temperature control valve of the flushing circuit through the "Automatic Adjustment / Forced Manual" switch; when the "Automatic Adjustment / Forced Manual" switch displays "Automatic Adjustment", it means that the valve is in the forced manual state. Enter the forced opening value in the "Forced Manual Opening Setting" input box; when the "Automatic Adjustment / Forced Manual" switch displays "Forced Manual", it means that the valve is in the automatic adjustment state. The control system will automatically adjust the opening of the pneumatic temperature control valve of the flushing circuit according to the oil supply temperature feedback value, change the mixing ratio of the cold and hot oil media, and stabilize the oil supply temperature required for the test; Step 4: Click the "Start" button for oil supply temperature control, and the control system will automatically execute the oil supply temperature control logic to ensure that the oil supply temperature is within the test requirements; Step 5: Click the "Stop" button of the fuel supply temperature control, and the control system will stop executing the fuel supply temperature control logic; When the "remote monitoring" interface is in "remote" mode, it serves as a monitoring interface for the centralized control and automatic operation of the intelligent thin oil lubrication system for gearbox testing. It is mainly used to check whether the centralized control signal is normal.

[0014] The present invention integrates the lubrication and control systems into an integrated design to provide a complete solution. The lubrication system can adopt a pump control system consisting of a variable frequency motor and a quantitative oil pump to achieve real-time adjustment of the test flow. The real-time flow is detected by a flow sensor, and the speed of the variable frequency motor is closed-loop controlled to improve the accuracy of the oil supply flow. A single lubrication system can achieve an expanded flow regulation range ratio by connecting multiple pump control systems in parallel. The lubrication system can be controlled locally and centrally. When controlled by the central control, multiple lubrication systems can be linked to achieve a larger flow. The lubrication system adopts a water cooling system. In order to adapt to the changes in the factory's water cooling environment, the oil supply temperature sensor is used to detect, and the closed-loop control of the two-way regulating valve controls the cooling water volume or the closed-loop control of the three-way mixing valve controls the ratio of hot and cold media to achieve precise control of the lubricating oil temperature. The lubrication system is provided with a return oil temperature detection sensor. By detecting the oil supply temperature, oil supply flow, and return oil temperature, the heating power of the gearbox can be estimated.

[0015] The lubrication system is equipped with an oil supply pressure transmitter, which, combined with oil supply temperature and flow sensors, is used to determine the lubrication parameters of different gearboxes.

[0016] The lubrication system is equipped with a high-level oil tank for emergency oil supply and UPS power supply. In the event of oil pump failure or sudden power outage during the test, the pneumatic valve in the high-level oil tank can ensure operation, maintain oil supply and lubrication during the host machine shutdown and idling, and protect the host machine.

[0017] Lubrication test function (multi-mode): self-circulating filtration, gearbox oil filling, high-position oil tank oil filling, oil tank-less flushing, pump-supply flushing, oil pumping mode.

[0018] Through programmable controllers, touch screens, industrial computers, etc., the intelligence, visualization and data recording functions of the thin oil lubrication system are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples.

[0020] Figure 1 It is a structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0021] An intelligent thin oil lubrication system for gearbox testing includes an oil tank 1, which is connected to multiple oil supply systems and oil return systems; each oil supply system has two parallel oil supply pumps 2, one for use and one for backup; the oil supply pump is connected to a filter 3, which is connected to a water cooler 4, which is connected to an oil circuit leading to the oil supply port of a reducer; an oil supply pressure transmitter 5 is provided on the oil circuit leading to the oil supply port of the reducer; a mixing valve 6 is provided at the outlet end of the water cooler, which is connected to the inlet end of the water cooler through a mixed oil circuit 7; and a temperature sensor 8 is provided at the outlet end of the water cooler. Each oil return system includes two parallel return oil pumps 9, the return oil pump inlet is connected to the oil circuit from the oil outlet of the reduction gearbox 10, the return oil pump is connected to the filter 11, and the filter is connected to the return oil circuit 12 leading to the oil tank; the oil circuit from the oil outlet of the reduction gearbox is provided with a return oil temperature sensor 13; a spare high-level oil tank 14 is provided above the reducer, and the high-level oil tank is connected to the oil supply port of the reducer through a pneumatic valve 15; the lubrication system adjusts the motor speed of the oil pump in real time to achieve a balance between the oil supply and oil extraction flow, thereby realizing the stability of the oil level in the gearbox; through the programmable controller, touch screen, and industrial computer, the intelligent, visual, and data recording functions of the thin oil lubrication system are realized.

[0022] The system has the following working modes: Internal circulation mode: the oil supply pump draws oil from the oil tank and returns it to the oil tank through the main oil pump circuit of the flushing unit; Filling mode: The oil supply pump draws oil from the oil tank, passes through the main oil pump circuit of the flushing unit, and then quantitatively fills it into the gearbox; this mode can be used to extract the oil in the oil tank when necessary; Flushing mode A: The oil pump draws oil from the gearbox back to the oil tank, and the oil supply pump draws oil from the oil tank and flushes and lubricates the gearbox through the flushing unit, completing the entire cycle; Flushing mode B: The oil supply pump draws oil from the gearbox and lubricates the gearbox through the flushing unit. The gearbox lubricating oil is connected to the flushing unit oil suction port through a pipeline, and the gearbox is filtered and lubricated repeatedly. 5) Oil pumping mode: suck oil from the gearbox, pass through the flushing unit and return to the oil tank; this mode can be used to replenish the oil tank when necessary; The entire gas station is controlled by PLC. The operating mode is selected, the working status is checked, and the working parameters are controlled through the touch screen. There is a communication interface with the host computer, and the local operation or central control operation is selected through the conversion switch. Internal circulation mode: set the circulation flow rate and manually control start / stop; Filling mode: Provide the oil filling amount that meets the test conditions through feedback control of accumulated oil volume or oil level; Flushing mode A: Set the flushing flow rate and flush at a constant flow rate and temperature based on feedback from the flow meter and temperature sensor. Different flow rates activate different numbers of oil supply and oil extraction pumps. The oil extraction pump automatically adjusts the flow rate to ensure that the gearbox oil level does not overflow and the oil extraction pump does not suck empty oil. Flushing mode B: Set the flushing flow rate and flush at a constant flow rate and temperature through feedback from the flow meter and temperature sensor; different flow rates will start different numbers of oil supply pumps; Pumping mode: Set flow rate and manually control start / stop; the oil collecting pipe is equipped with a liquid level transmitter; the pump will automatically stop when the oil pumping volume is too low to prevent the pump from running dry; The temperature control module is relatively independent and provides a temperature that meets the test conditions based on the feedback signal from the temperature sensor.

[0023] The intelligent thin oil lubrication control system for gearbox testing is divided into two subsystems: Unit 1 and Unit 2. The two units are independent of each other. To enable simultaneous testing of two gearboxes without affecting each other, the two units can be combined and used when necessary to meet the needs of testing larger flow rates. By selecting different units and the number of oil pumps, a wide range ratio test range of 1:18 for oil flow can be achieved; When only 1# pump or 2# pump is selected, the selected pump is the flow closed-loop adjustment pump; When 1# pump and 2# pump are selected at the same time, 2# pump is set as flow closed-loop adjustment pump by default; The two subsystems have the same functions, including: (1) Selection of control mode Each subsystem includes three control modes: debugging, local cabinet, and remote, which are realized through the conversion switch on the cabinet door; 1) Debug mode The subsystem is in manual operation state, and all operations are completed on the on-site touch screen; The oil pump variable frequency motor, electric heater, pneumatic ball valve, and pneumatic regulating valve on the subsystem can be independently controlled to start and stop; This mode is mainly used for initial signal debugging and later equipment inspection and maintenance; 2) This cabinet mode The subsystem is in automatic operation and all operations are completed on the on-site touch screen; By switching the pneumatic ball valve and adjusting the oil circuit, the subsystem can switch the pump group between various working modes: self-circulation mode, filling mode, flushing "oil tank" mode, flushing "no oil tank" mode, and oil extraction mode; The subsystem detects the oil tank temperature, controls the start and stop of the oil tank electric heater, adjusts the oil temperature according to the gearbox test conditions, and is used for self-circulation and flushing "oil tank" modes.

[0024] The subsystem detects the pipeline temperature, controls the start and stop of the pipeline electric heater, adjusts the oil temperature according to the gearbox test conditions, and is used for self-circulation and flushing "tankless" mode.

[0025] The subsystem detects the oil flow rate and adjusts the speed of the variable frequency oil pump motor. It also adjusts the oil pump flow rate according to the gearbox test conditions. It is used for flushing the "oil tank" and flushing the "no oil tank" modes. The subsystem controls the start and stop of the oil supply pump motor through oil supply flow pulse or liquid level detection, accurately filling the gearbox or high-level oil tank for filling mode; The subsystem detects the liquid level in the gearbox and the return oil collecting pipe, adjusts the speed of the variable frequency oil pump motor, and controls the liquid level in the gearbox and the return oil collecting pipe within a safe range, which is used for flushing the "oil tank" mode; The subsystem controls the start and stop of the oil pump motor by detecting the liquid level of the oil return collecting pipe, and pumps the test oil into the oil tank for use in the oil pumping mode; The subsystem detects the oil supply temperature and adjusts the opening of the cooling water pneumatic control valve or the oil circuit pneumatic mixing valve. It also adjusts the oil supply temperature according to the gearbox test conditions. This is used for flushing the "oil tank" and flushing the "no oil tank" modes. The pneumatic control valve can be forced to perform manual setting operations in automatic mode. The subsystem controls the start and stop of the emergency pneumatic ball valve by detecting the oil supply pressure and is used in conjunction with the UPS power supply system. When the oil supply pressure is lower than the emergency pressure setting value, the emergency pneumatic ball valve opens and the oil in the high-level oil tank is injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox. 3) Remote mode The subsystem is in automatic operation, and all operations are completed on the computer in the centralized control room; All functions implemented in this mode are consistent with those in the local mode.

[0026] The following is the display screen on the central large screen of the centralized control room, which shows the status of two units at the same time.

[0027] Includes a touch screen, touch screen features include: After the touch screen is powered on, the project file will be automatically started, and the "System Home Page" interface will be displayed after the startup is completed; ①The "System Home" interface mainly displays project information. Click the "Enter System" button in the lower right corner to enter the "Device Status" interface; Click the menu bar button above the "Device Status" interface to enter the corresponding sub-screen, including: device status, manual monitoring, local cabinet monitoring, remote monitoring, alarm list, trend curve, parameter setting, and realize the corresponding manual / automatic operation; The "Device Status" interface displays the circuit principle and device status of the intelligent thin oil lubrication system for gearbox testing; ② When in the "debugging" mode, the "manual monitoring" interface serves as the on-site operation interface of the intelligent thin oil lubrication system for gearbox testing, and is used to individually control each actuator; ③ When the "this cabinet monitoring" interface is in the "this cabinet" mode, it serves as the on-site operation interface of the intelligent thin oil lubrication system for gearbox testing; In the lower right corner of the "Current Cabinet Monitoring" interface is the switch button for "Pump Group Mode Selection". When you click this button, the "Mode Selection Interface" will pop up; click this button again to close the "Mode Selection Interface"; Below the "Current Cabinet Monitoring" interface is the "Operation Interface" button. By clicking this button, you can enter the operation interface of different modes; a) Self-circulation operation interface In the self-circulation mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch, and the control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state.

[0028] Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be used, and enter the required flow rate in the "Flow Rate" input box. When the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the self-circulation program; Step 4: Click the "Stop" button of the oil system, and the control system will stop driving the entire system; b) Filling operation interface In filling mode, according to the gearbox test outline, you can choose to fill the high-level oil tank or the gearbox. Follow the steps below: I. Gearbox filling operation: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Enter the required oil volume in the "Fuel Volume Given" input box; Step 3: Use the selector switch to confirm whether to fill the gearbox or the high-level tank; when the selector switch displays "Fill high-level tank", it means filling the gearbox; enter the desired oil level value in the "Oil level setting" input box of the gearbox; Step 4: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 5: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the gearbox filling procedure; Step 6: When the oil filling amount or the gearbox oil level is higher than the set value, or the oil system "Stop" button is clicked, the control system will stop driving the entire system; II. High-level fuel tank filling operation: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Enter the required oil volume in the "Fuel Volume Given" input box; Step 3: Use the selector switch to confirm whether to fill the gearbox or the high-level tank; when the selector switch displays "Gearbox Fill", it means filling the high-level tank; enter the desired oil level value in the "Oil Level Set" input box of the high-level tank; Step 4: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 5: Click the "Open" button of the emergency ball valve, and the control system will open the emergency pneumatic ball valve of the high-level fuel tank; Step 6: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the high-level oil tank filling procedure; Step 7: When the oil filling amount or the oil level in the high-level oil tank is higher than the set value, or the "Stop" button of the oil system is clicked, the control system will stop driving the entire system; Step 8: Click the "Close" button of the emergency ball valve, and the control system will close the emergency pneumatic ball valve of the high-level fuel tank to prepare for subsequent test operations; c) Flush "Oil Tank" operation interface In flushing A mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Enable / Disable" switch for the flushing pump flow closed loop; when the "Enable / Disable" switch displays "Disable", it means that the automatic flow adjustment function of the flushing pump is in use. The control program will automatically adjust the speed of the variable frequency flushing pump according to the flow detected by the oil supply flow meter to stabilize the flow required for the test; Step 4: Click "Next Page" to enter the oil well pump operation interface; Step 5: Select the number of oil well pumps to be put into use through the "Enable / Disable" switch of the oil well pump, and enter the required flow rate in the "Flow Rate Setting" input box; when the "Enable / Disable" switch displays "Disable", it means that the oil well pump is put into use; Step 6: Enter the liquid level value to be controlled in the "Gearbox and Return Oil Pipe Liquid Level" input box; the upper limit of the gearbox liquid level is set to ensure that the lubricating oil does not overflow the gearbox; the lower limit of the return oil pipe liquid level is set to ensure that the oil pump does not suck dry; Step 7: Click the "Enable / Disable" switch for the oil well pump level flow compensation. When the "Enable / Disable" switch displays "Disable", it means that the automatic flow adjustment function of the oil well pump is in use. Ensure that the liquid level of the gear box and the return oil pipe is within the set range. Step 8: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the flushing "oil tank" mode procedure; Step 9: When the oil supply flow is stable, enter the emergency ball valve start pressure value in the "Pressure Setting" input box of the high-level oil tank. Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Disable", it means that the emergency ball valve function is in use. When the oil supply pressure is lower than the emergency ball valve start pressure value, the emergency ball valve will automatically open, and the oil in the high-level oil tank will be injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox; Step 10: Click the "Stop" button of the oil system, and the control system will stop the entire oil system; Step 11: Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Enable", it means that the emergency ball valve has been turned off; d) Flush the "no oil tank" operation interface In flushing B mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Enable / Disable" switch for the flushing pump flow closed loop. When the "Enable / Disable" switch displays "Disable," the automatic flow adjustment function of the flushing pump is in use. The control program will automatically adjust the speed of the variable frequency flushing pump based on the flow detected by the oil flow meter to stabilize the flow required for the test. Step 4: Click the "Start" button of the oil system, and the control system will automatically drive the oil system to perform the flushing "no oil tank" mode procedure; Step 5: When the oil flow stabilizes, enter the emergency ball valve start pressure value in the "Pressure Setting" input box of the high-level oil tank. Click the "Enable / Disable" switch of the emergency ball valve. When the "Enable / Disable" switch displays "Disable", it means that the emergency ball valve function is in use. When the oil supply pressure is lower than the emergency ball valve start pressure value, the emergency ball valve will automatically open, and the oil in the high-level oil tank will be injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox; Step 6: Click the "Stop" button of the oil system, and the control system will stop the entire oil system; Step 7: Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Enable", it means that the emergency ball valve has been turned off; e) Oil pumping operation interface In the pumping mode, according to the gearbox test outline, follow the steps below: Step 1: Enter the desired oil level in the "Oil Level Given" input box of the oil collecting pipe; Step 2: Select the number of oil well pumps to be put into use through the "Enable / Disable" switch of the oil well pump, and enter the required flow rate in the "Flow Rate Setting" input box; when the "Enable / Disable" switch displays "Disable", it means that the oil well pump is put into use; Step 3: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the oil pumping procedure; Step 4: When the oil level in the oil collecting pipe is lower than the set value, or the "Stop" button of the oil system is clicked, the control system will stop driving the entire system; f) Temperature control operation interface The temperature control interface is valid in any pump group mode and is used to control the oil tank temperature, flushing pump suction temperature, and oil supply temperature according to the test outline. Follow the steps below: Fuel tank temperature control operation: Step 1: Enter the temperature control range in the "Start Temperature" and "Stop Temperature" input boxes of the fuel tank oil temperature; Step 2: Click the "Start" button for fuel tank temperature control, and the control system will automatically execute the fuel tank temperature control logic to ensure that the fuel tank temperature is within the test requirements; Step 3: Click the "Stop" button of the fuel tank temperature control, and the control system will stop executing the fuel tank temperature control logic; Flushing pump oil suction temperature control operation: Step 1: Enter the temperature control range in the "Start Temperature" and "Stop Temperature" input boxes of the flushing pump oil suction temperature; Step 2: Click the "Start" button for the flushing pump oil suction temperature control, and the control system will automatically execute the flushing pump oil suction temperature control logic to ensure that the flushing pump oil suction temperature is within the test requirements.

[0029] Step 3: Click the "Stop" button of the flushing pump oil suction temperature control, and the control system will stop executing the flushing pump oil suction temperature control logic; Oil supply temperature control operation: Step 1: Enter the oil supply temperature required for the test in the oil supply "temperature setting" input box; Step 2: Select the working mode of the valve through the "Automatic Adjustment / Forced Manual" switch of the cooling water pneumatic control valve; when the "Automatic Adjustment / Forced Manual" switch displays "Automatic Adjustment", it means that the valve is in the forced manual state. Enter the forced opening value in the "Forced Manual Opening Setting" input box; when the "Automatic Adjustment / Forced Manual" switch displays "Forced Manual", it means that the valve is in the automatic adjustment state. The control system will automatically adjust the opening of the cooling water pneumatic control valve according to the oil supply temperature feedback value, change the cooling water volume, and stabilize the oil supply temperature required for the test; Step 3: Select the working mode of the pneumatic temperature control valve of the flushing circuit through the "Automatic Adjustment / Forced Manual" switch; when the "Automatic Adjustment / Forced Manual" switch displays "Automatic Adjustment", it means that the valve is in the forced manual state. Enter the forced opening value in the "Forced Manual Opening Setting" input box; when the "Automatic Adjustment / Forced Manual" switch displays "Forced Manual", it means that the valve is in the automatic adjustment state. The control system will automatically adjust the opening of the pneumatic temperature control valve of the flushing circuit according to the oil supply temperature feedback value, change the mixing ratio of the cold and hot oil media, and stabilize the oil supply temperature required for the test; Step 4: Click the "Start" button for oil supply temperature control, and the control system will automatically execute the oil supply temperature control logic to ensure that the oil supply temperature is within the test requirements; Step 5: Click the "Stop" button of the fuel supply temperature control, and the control system will stop executing the fuel supply temperature control logic; When the "remote monitoring" interface is in "remote" mode, it serves as a monitoring interface for the centralized control and automatic operation of the intelligent thin oil lubrication system for gearbox testing. It is mainly used to check whether the centralized control signal is normal.

[0030] Main technical performance indicators 1. Applicable medium: ISO VG46 2. Nominal pressure: 0.63MPa 3. Nominal flow rate: 4500L / min 4. Flow adjustment range ratio: 1:18 5. Flow regulation accuracy: ±1% 6. Oil supply temperature: 45±2℃ 7. Filtration accuracy: 3 / 20μm 8. Cooling water temperature: ≤28℃ 9. System power supply: 380V AC / 50Hz Application scope: Mainly used in factory testing of gearboxes or bearing manufacturers.

Claims

1. An intelligent thin oil lubrication system for gearbox testing, including an oil tank, characterized by: The oil tank is connected to multiple oil supply systems and oil return systems; each oil supply system has two parallel oil supply pumps, one for use and one for backup, the oil supply pump is connected to a filter, the filter is connected to a water cooler, the water cooler is connected to the oil line leading to the reducer oil supply port, an oil supply pressure transmitter is provided on the oil line leading to the reducer oil supply port, a mixing valve is provided at the outlet of the water cooler, and the mixing valve is connected to the inlet of the water cooler through the mixed oil line; each oil return system includes two parallel return oil pumps, the return pump inlet is connected to the oil line from the reducer oil outlet, and the return oil The pump is connected to a filter, which is then connected to an oil return line leading to the oil tank. An oil return temperature sensor is provided on the oil line from the oil outlet of the reduction gearbox. A spare high-level oil tank is provided above the reduction gearbox, which is connected to the oil supply port of the reduction gearbox through a pneumatic valve. The lubrication system adjusts the motor speed of the oil pump in real time to achieve a balance between the oil supply and oil extraction flow, thereby stabilizing the oil level in the gearbox. Through programmable controllers, touch screens, and industrial computers, the intelligent, visual, and data recording functions of the thin oil lubrication system are realized.

2. The intelligent thin oil lubrication system for gearbox testing according to claim 1, comprising an oil tank, characterized in that: A temperature sensor is provided at the outlet of the water cooler.

3. The intelligent thin oil lubrication system for gearbox testing according to claim 1 or 2, comprising an oil tank, characterized in that: The system has the following working modes: Internal circulation mode: the oil supply pump draws oil from the oil tank and returns it to the oil tank through the main oil pump circuit of the flushing unit; Filling mode: The oil supply pump draws oil from the oil tank, passes through the main oil pump circuit of the flushing unit, and then quantitatively fills it into the gearbox; this mode can be used to extract the oil in the oil tank when necessary; Flushing mode A: The oil pump draws oil from the gearbox back to the oil tank, and the oil supply pump draws oil from the oil tank to flush and lubricate the gearbox through the flushing unit, completing the entire cycle; Flushing mode B: The oil supply pump draws oil from the gearbox and lubricates the gearbox through the flushing unit. The gearbox lubricating oil is connected to the flushing unit oil suction port through a pipeline, and the gearbox is filtered and lubricated repeatedly. 5) Oil pumping mode: suck oil from the gearbox, pass through the flushing unit and return to the oil tank; this mode can be used to replenish the oil tank when necessary; The entire gas station is controlled by PLC. The operating mode is selected, the working status is checked, and the working parameters are controlled through the touch screen. There is a communication interface with the host computer, and the local operation or central control operation is selected through the conversion switch. Internal circulation mode: set the circulation flow rate and manually control start / stop; Filling mode: Provide the oil filling amount that meets the test conditions through feedback control of accumulated oil volume or oil level; Flushing Mode A: Set the flushing flow rate and flush at a constant flow and temperature based on feedback from the flow meter and temperature sensor. Different flow rates activate different numbers of oil supply and oil extraction pumps. The oil extraction pump automatically adjusts the flow rate to ensure that the gearbox oil level does not overflow and the oil extraction pump does not suck empty oil. Flushing mode B: Set the flushing flow rate and flush at a constant flow rate and temperature through feedback from the flow meter and temperature sensor; different flow rates will start different numbers of oil supply pumps; Pumping mode: Set flow rate and manually control start / stop; the oil collecting pipe is equipped with a liquid level transmitter; the pump will automatically stop when the oil pumping volume is too low to prevent the pump from running dry; The temperature control module is relatively independent and provides a temperature that meets the test conditions based on the feedback signal from the temperature sensor.

4. The intelligent thin oil lubrication system for gearbox testing according to claim 3, comprising an oil tank, is characterized by: The intelligent thin oil lubrication control system for gearbox testing is divided into two subsystems: Unit 1 and Unit 2. The two units are independent of each other. To enable simultaneous testing of two gearboxes without affecting each other, the two units can be combined and used when necessary to meet the needs of testing larger flow rates. By selecting different units and the number of oil pumps, a wide range ratio test range of 1:18 for oil flow can be achieved; When only 1# pump or 2# pump is selected, the selected pump is the flow closed-loop adjustment pump; When 1# pump and 2# pump are selected at the same time, 2# pump is set as flow closed-loop adjustment pump by default; The two subsystems have the same functions, including: (1) Selection of control mode Each subsystem includes three control modes: debugging, local cabinet, and remote, which are realized through the conversion switch on the cabinet door; 1) Debug mode The subsystem is in manual operation state, and all operations are completed on the on-site touch screen; The oil pump variable frequency motor, electric heater, pneumatic ball valve, and pneumatic regulating valve on the subsystem can be independently controlled to start and stop; This mode is mainly used for initial signal debugging and later equipment inspection and maintenance; 2) This cabinet mode The subsystem is in automatic operation and all operations are completed on the on-site touch screen; By switching the pneumatic ball valve and adjusting the oil circuit, the subsystem can switch between various working modes: self-circulation mode, filling mode, flushing "oil tank" mode, flushing "no oil tank" mode, and oil extraction mode; The subsystem detects the oil tank temperature, controls the start and stop of the oil tank electric heater, adjusts the oil temperature according to the gearbox test conditions, and is used for self-circulation and flushing "oil tank" mode; The subsystem detects pipeline temperature, controls the start and stop of pipeline electric heaters, adjusts oil temperature according to gearbox test conditions, and is used for self-circulation and flushing "tankless" mode; The subsystem detects the oil flow rate and adjusts the speed of the variable frequency oil pump motor. It also adjusts the oil pump flow rate according to the gearbox test conditions. It is used for flushing "oil tank" and flushing "no oil tank" modes. The subsystem controls the start and stop of the oil supply pump motor through oil supply flow pulse or liquid level detection, accurately filling the gearbox or high-level oil tank for filling mode; The subsystem detects the liquid level in the gearbox and the return oil collecting pipe, adjusts the speed of the variable frequency oil pump motor, and controls the liquid level in the gearbox and the return oil collecting pipe within a safe range, which is used for flushing the "oil tank" mode; The subsystem controls the start and stop of the oil pump motor by detecting the liquid level of the oil return collecting pipe, and pumps the test oil into the oil tank for use in the oil pumping mode; The subsystem detects the oil supply temperature and adjusts the opening of the cooling water pneumatic control valve or the oil circuit pneumatic mixing valve. It also adjusts the oil supply temperature based on the gearbox test conditions. This is used for flushing in "oil tank" and "no oil tank" modes. The pneumatic control valve can be manually set in automatic mode. The subsystem controls the start and stop of the emergency pneumatic ball valve by detecting the oil supply pressure and is used in conjunction with the UPS power supply system. When the oil supply pressure is lower than the emergency pressure setting value, the emergency pneumatic ball valve opens and the oil in the high-level oil tank is injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox. 3) Remote mode The subsystem is in automatic operation, and all operations are completed on the computer in the centralized control room; All functions implemented in this mode are consistent with those in the local mode; The following is the display screen on the central large screen of the centralized control room, which shows the status of two units at the same time.

5. The intelligent thin oil lubrication system for gearbox testing according to claim 4, comprising an oil tank, is characterized by: Includes a touch screen, touch screen features include: After the touch screen is powered on, the project file will be automatically started, and the "System Home Page" interface will be displayed after the startup is completed. ①The "System Home" interface mainly displays project information; click the "Enter System" button in the lower right corner to enter the "Device Status" interface; Click the menu bar button above the "Device Status" interface to enter the corresponding sub-screen, including: device status, manual monitoring, local cabinet monitoring, remote monitoring, alarm list, trend curve, parameter setting, and realize the corresponding manual / automatic operation; The "Device Status" interface displays the circuit principle and device status of the intelligent thin oil lubrication system for gearbox testing; ② When in "Debug" mode, the "Manual Monitoring" interface serves as the on-site operation interface for the intelligent thin oil lubrication system for gearbox testing, used to individually control each actuator; ③ When the "this cabinet monitoring" interface is in "this cabinet" mode, it serves as the on-site operation interface of the intelligent thin oil lubrication system for gearbox testing; In the lower right corner of the "Current Cabinet Monitoring" interface is the "Pump Group Mode Selection" switch button. When you click this button, the "Mode Selection Interface" will pop up; click this button again to close the "Mode Selection Interface"; Below the "Current Cabinet Monitoring" interface is the "Operation Interface" button. By clicking this button, you can enter the operation interface of different modes; a) Self-circulation operation interface In the self-circulation mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "Ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the self-circulation program; Step 4: Click the "Stop" button of the oil system, and the control system will stop driving the entire system; b) Filling operation interface In filling mode, according to the gearbox test outline, you can choose to fill the high-level oil tank or the gearbox. Follow the steps below: I. Gearbox filling operation: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "Ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Enter the required oil volume in the "Fuel Volume" input box; Step 3: Use the selector switch to confirm whether to fill the gearbox or the high-level tank; when the selector switch displays "Fill high-level tank", it means filling the gearbox; enter the desired oil level value in the gearbox "Oil level setting" input box; Step 4: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 5: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the gearbox filling procedure; Step 6: When the oil filling amount or the gearbox oil level is higher than the set value, or the oil system "Stop" button is clicked, the control system will stop driving the entire system; II. High-level fuel tank filling operation: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "Ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Enter the required oil volume in the "Fuel Volume" input box; Step 3: Use the selector switch to confirm whether to fill the gearbox or the high-level tank. When the selector switch displays "Gearbox Fill", it means filling the high-level tank. Enter the desired oil level in the "Oil Level Set" input box of the high-level tank. Step 4: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 5: Click the "Open" button of the emergency ball valve, and the control system will open the emergency pneumatic ball valve of the high-level fuel tank; Step 6: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the high-level oil tank filling procedure; Step 7: When the oil filling amount or the oil level in the high-level oil tank is higher than the set value, or the "Stop" button of the oil system is clicked, the control system will stop driving the entire system; Step 8: Click the "Close" button on the emergency ball valve, and the control system will close the emergency pneumatic ball valve of the high-level oil tank to prepare for subsequent test operations; c) Flush "Oil Tank" operation interface In flushing A mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "Ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Enable / Disable" switch for the flushing pump flow closed loop. When the "Enable / Disable" switch displays "Disable," the automatic flow adjustment function of the flushing pump is in use. The control program will automatically adjust the speed of the variable frequency flushing pump according to the flow detected by the oil flow meter to stabilize the flow required for the test. Step 4: Click "Next Page" to enter the oil well pump operation interface; Step 5: Select the number of oil well pumps to be put into use through the "Enable / Disable" switch of the oil well pump, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the oil well pump is in use; Step 6: Enter the liquid level value to be controlled in the "Gearbox and Return Oil Pipe Liquid Level" input box; the upper limit of the gearbox liquid level is set to ensure that the lubricating oil does not overflow the gearbox; the lower limit of the return oil pipe liquid level is set to ensure that the oil pump does not suck dry; Step 7: Click the "Enable / Disable" switch for the oil well pump level flow compensation. When the "Enable / Disable" switch displays "Disable," the oil well pump's automatic flow adjustment function is enabled. Ensure that the gearbox and oil return pipe liquid levels are within the set range. Step 8: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the flushing "oil tank" mode program; Step 9: When the oil supply flow stabilizes, enter the emergency ball valve start pressure value in the "Pressure Setting" input box of the high-level oil tank; click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Disable", it means that the emergency ball valve function is in use. When the oil supply pressure is lower than the emergency ball valve start pressure value, the emergency ball valve will automatically open, and the oil in the high-level oil tank will be injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox; Step 10: Click the "Stop" button of the oil system, and the control system will stop the entire oil system; Step 11: Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Enable", it means that the emergency ball valve has been turned off. d) Flush the "no oil tank" operation interface In flushing B mode, according to the gearbox test outline, follow the steps below: Step 1: Click the "Start" button on the flushing pump system valve switch. The control system will switch the corresponding pneumatic ball valve until it is "Ready". At the same time, you need to manually confirm that the manual valves of the oil system are in the correct open or closed state. Step 2: Use the "Enable / Disable" switch to select the number of flushing pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the flushing pump is in use; Step 3: Click the "Enable / Disable" switch for the flushing pump flow closed loop. When the "Enable / Disable" switch displays "Disable," the automatic flow adjustment function of the flushing pump is in use. The control program will automatically adjust the speed of the variable frequency flushing pump according to the flow detected by the oil flow meter to stabilize the flow required for the test. Step 4: Click the "Start" button of the oil system, the control system will automatically drive the oil system and execute the flushing "no oil tank" mode procedure; Step 5: When the oil supply flow stabilizes, enter the emergency ball valve start pressure value in the "Pressure Setting" input box of the high-level oil tank; click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Disable", it means that the emergency ball valve function is in use. When the oil supply pressure is lower than the emergency ball valve start pressure value, the emergency ball valve will automatically open, and the oil in the high-level oil tank will be injected into the gearbox by gravity, maintaining oil supply and lubrication during the gearbox shutdown and idling period to protect the gearbox; Step 6: Click the "Stop" button of the oil system, and the control system will stop the entire oil system; Step 7: Click the "Enable / Disable" switch of the emergency ball valve; when the "Enable / Disable" switch displays "Enable", it means that the emergency ball valve has been turned off. e) Oil pumping operation interface In the pumping mode, according to the gearbox test outline, follow the steps below: Step 1: Enter the desired oil level in the "Oil Level Given" input box of the oil collecting pipe; Step 2: Use the "Enable / Disable" switch to select the number of oil well pumps to be put into use, and enter the required flow rate in the "Flow Rate" input box; when the "Enable / Disable" switch displays "Disable", it means that the oil well pump is in use; Step 3: Click the "Start" button of the oil system, and the control system will automatically drive the oil system and execute the oil pumping procedure; Step 4: When the oil level in the oil collecting pipe is lower than the set value, or the "Stop" button of the oil system is clicked, the control system will stop driving the entire system; f) Temperature control operation interface The temperature control interface is valid in any pump group mode and is used to control the oil tank temperature, flushing pump suction temperature, and oil supply temperature according to the test outline. Follow the steps below: Fuel tank temperature control operation: Step 1: Enter the temperature control range in the "Start Temperature" and "Stop Temperature" input boxes of the fuel tank oil temperature; Step 2: Click the "Start" button for fuel tank temperature control, and the control system will automatically execute the fuel tank temperature control logic to ensure that the fuel tank temperature is within the test requirements; Step 3: Click the "Stop" button of the fuel tank temperature control, and the control system will stop executing the fuel tank temperature control logic; Flushing pump oil suction temperature control operation: Step 1: Enter the temperature control range in the "Start Temperature" and "Stop Temperature" input boxes of the flushing pump oil suction temperature; Step 2: Click the "Start" button for the flushing pump oil suction temperature control, and the control system will automatically execute the flushing pump oil suction temperature control logic to ensure that the flushing pump oil suction temperature is within the test requirements; Step 3: Click the "Stop" button of the flushing pump oil suction temperature control, and the control system will stop executing the flushing pump oil suction temperature control logic; Oil supply temperature control operation: Step 1: Enter the oil supply temperature required for the test in the oil supply "temperature setting" input box; Step 2: Select the valve operating mode through the "Automatic Adjustment / Forced Manual" switch of the cooling water pneumatic control valve; when the "Automatic Adjustment / Forced Manual" switch displays "Automatic Adjustment", it means that the valve is in the forced manual state. Enter the forced opening value in the "Forced Manual Opening Setting" input box; when the "Automatic Adjustment / Forced Manual" switch displays "Forced Manual", it means that the valve is in the automatic adjustment state. The control system will automatically adjust the opening of the cooling water pneumatic control valve according to the oil supply temperature feedback value, change the cooling water volume, and stabilize the oil supply temperature required for the test; Step 3: Select the working mode of the pneumatic temperature control valve in the flushing circuit by switching on the "Automatic Adjustment / Forced Manual" switch. When the "Automatic Adjustment / Forced Manual" switch displays "Automatic Adjustment", it means that the valve is in the forced manual state. Enter the forced opening value in the "Forced Manual Opening Setting" input box. When the "Automatic Adjustment / Forced Manual" switch displays "Forced Manual", it means that the valve is in the automatic adjustment state. The control system will automatically adjust the opening of the pneumatic temperature control valve in the flushing circuit according to the oil supply temperature feedback value, change the mixing ratio of the cold and hot oil media, and stabilize the oil supply temperature required for the test. Step 4: Click the "Start" button for oil supply temperature control, and the control system will automatically execute the oil supply temperature control logic to ensure that the oil supply temperature is within the test requirements; Step 5: Click the "Stop" button of the fuel supply temperature control, and the control system will stop executing the fuel supply temperature control logic; When in "remote" mode, the "remote monitoring" interface serves as a monitoring interface for the centralized control and automatic operation of the intelligent thin oil lubrication system for gearbox testing. It is mainly used to check whether the centralized control signal is normal.

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