Hydraulic motor test system with multiple loading modes

Abstract

The utility model belongs to the technical field of hydraulic motor testing, and particularly relates to a hydraulic motor testing system with multiple loading modes, which comprises a power system, a testing control unit, a testing rack and a measurement and control system, the power system is used for providing a power source for the whole system; the test control unit is used for receiving a control signal of the measurement and control system and driving the execution unit to work; the test bench comprises a test motor, a torque meter and a loading motor; the measurement and control system comprises a power cabinet and a control cabinet and is used for completing electrical control and testing of the system. The test system of the utility model can carry out hydraulic motor endurance test; testing displacement, leakage and torque; performing a lateral load test; and test contents such as a backpressure loading test and the like meet various requirements of hydraulic motor tests.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic motor testing technology, specifically relating to a hydraulic motor testing system with multiple loading methods. Background Technology

[0002] A hydraulic motor is a hydraulic actuator that performs rotary motion and converts hydraulic energy into mechanical energy. It is widely used in engineering machinery, construction machinery, ships, hoists, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemicals, port machinery, etc.

[0003] With the rapid development of infrastructure and real estate construction in my country, the demand for construction machinery is increasing daily. Hydraulic motors, as actuators in construction machinery, are characterized by their compact structure, lightweight design, and mass production capabilities. To meet these characteristics and better ensure the performance of hydraulic motors, it is necessary to test various performance parameters. Utility Model Content

[0004] This invention provides a hydraulic motor testing system with multiple loading methods. The system primarily performs various performance tests on hydraulic motors, including durability tests, displacement, leakage, and torque tests, lateral load tests, and back pressure loading tests, thus meeting various testing needs for hydraulic motors.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic motor testing system with multiple loading methods, including a power system, a test control unit, a test bench, and a measurement and control system;

[0007] The power system includes an oil tank unit and a pump unit, which provide a power source for the entire system; the pump unit includes a variable displacement piston pump and a fixed displacement vane pump.

[0008] The test control unit is used to receive control signals from the test and control system and drive the execution unit to work; it includes a proportional speed control valve, an overflow valve, a rectifier assembly, and a proportional overflow valve.

[0009] The proportional speed control valve is used to adjust the hydraulic oil volume of the test motor;

[0010] The relief valve is used to set the outlet back pressure of the test motor;

[0011] The rectifier assembly consists of four check valves, which enable the hydraulic circuit to be loaded when the loading motor rotates forward and reverse.

[0012] The proportional relief valve is used to adjust the pressure of the hydraulic circuit of the loading motor;

[0013] The test bench includes a test motor, a torque meter, and a loading motor; the test motor, torque meter, and loading motor are connected by a drive shaft; the loading motor is used for loading in the motor durability test; the torque meter transmits the measured data to the measurement and control system in real time.

[0014] The measurement and control system includes a power cabinet and a control cabinet, which are used to complete the electrical control and testing of the system.

[0015] Furthermore, the power system also includes:

[0016] Two proportional relief valves are used to adjust the lateral load force output by the hydraulic cylinder and the system pressure supplied to the test motor, respectively.

[0017] The pressure sensor transmits the actual pressure signal of the system pipeline to the measurement and control system in real time.

[0018] Furthermore, the test control unit also includes:

[0019] Two flow meters are used: one to measure the flow rate of hydraulic oil entering the test motor and transmits the flow signal to the measurement and control system in real time; the other to measure the flow rate of hydraulic oil leaking from the test motor and transmit the flow signal to the measurement and control system in real time.

[0020] Furthermore, the test bench also includes:

[0021] The magnetic powder brake is connected to the drive shaft via a synchronous belt to provide loading force to the test motor.

[0022] The beneficial effects of this utility model are as follows:

[0023] (1) The testing system of this utility model is equipped with multiple loading methods. These loading methods can be tested individually or in combination, which meets the various needs of hydraulic motor testing.

[0024] (2) The test system of this utility model is designed with a flow calibration oil circuit, which can realize the self-calibration of the set flow rate of the test system;

[0025] (3) The test system of this utility model is designed with a closed loading oil circuit. When the test motor is subjected to durability test, it does not need to provide additional loading force. It only needs to replenish the hydraulic oil required by the loading oil circuit. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the testing system of this utility model;

[0027] Figure 2 for Figure 1 Enlarged schematic diagram of the intermediate rectifier component;

[0028] Figure 3 An enlarged schematic diagram of the test control unit and test bench in the self-calibration principle diagram for providing a given flow rate to the test motor;

[0029] Figure 4 An enlarged schematic diagram of the test control unit and test bench in the principle diagram for performing a durability test on a loaded motor;

[0030] Figure 5 An enlarged schematic diagram of the test control unit and test bench in the experimental principle diagram for performing a reverse rotation test on the loading motor;

[0031] Figure 6 An enlarged schematic diagram of the test control unit and test bench in the principle diagram for testing displacement, leakage, and torque of a magnetic powder brake under load;

[0032] Figure 7 An enlarged schematic diagram of the test control unit and test bench in the back pressure test schematic diagram for loading a magnetic powder brake;

[0033] In the picture,

[0034] 1. Power System; 100. Oil Tank Unit; 101. Air Filter; 110. Motor Pump Unit 1; 111. Motor Pump Unit 2; 112. Motor Pump Unit 3; 113. Check Valve 1; 114. Check Valve 2; 115. Check Valve 3; 116. High-Pressure Oil Filter 1; 117. High-Pressure Oil Filter 2; 118. High-Pressure Oil Filter 3; 119. Return Oil Filter; 120. Proportional Relief Valve 1; 121. Proportional Relief Valve 2; 122. Solenoid Relief Valve; 123. Pressure Sensor 1; 124. Pressure Sensor 2; 2. Test Control Unit; 201. Proportional Speed ​​Control Valve; 202. Flow Meter 1; 203. Flow Meter 2; 204. Relief Valve 1; 205. Electro-hydraulic Directional Valve 1; 206. Electro-hydraulic Directional Valve 2; 207. Solenoid Directional Valve; 208. Accumulator; 209. Pressure sensor 3; 210, Pressure sensor 4; 211, Pressure sensor 5; 212, Pressure sensor 6; 213, Pressure sensor 7; 214, Relief valve 2; 215, Cooler; 216, Rectifier assembly; 216.1, Check valve 4; 216.2, Check valve 5; 216.3, Check valve 6; 216.4, Check valve 7; 217, Proportional relief valve 3; 218, Solenoid ball valve; 219, Check valve 8; 220, Electro-hydraulic directional valve 3; 3, Test bench; 301, Test motor; 302, Hydraulic cylinder; 303, Force sensor; 304, Torque meter; 305, Loading motor; 306, Magnetic powder brake; 307, Synchronous belt; 308, Drive shaft; 309, Electromagnetic clutch; 4, Measurement and control system; 400, Power cabinet; 401, Control cabinet. Detailed Implementation

[0035] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Example: A hydraulic motor testing system with multiple loading methods, mainly used for performance testing of hydraulic motors, including a power system 1, a test control unit 2, a test bench 3, and a measurement and control system 4; the principle of this testing system is as follows... Figure 1 As shown.

[0037] Depend on Figure 1 As can be seen, the power system 1 of this utility model mainly includes an oil tank device 100, a motor pump group one 110, a motor pump group two 111, a motor pump group three 112, a one-way valve one 113, a one-way valve two 114, a one-way valve three 115, a high-pressure oil filter one 116, a high-pressure oil filter two 117, a high-pressure oil filter three 118, a return oil filter 119, a proportional relief valve one 120, a proportional relief valve two 121, an electromagnetic relief valve 122, a pressure sensor one 123, and a pressure sensor two 124;

[0038] The oil tank device 100 primarily stores oil, dissipates heat, settles impurities in the oil, and removes air mixed in with the oil. It is equipped with an air filter 101 to effectively maintain stable air pressure within the oil tank and prevent impurities from entering. The first motor pump unit 110 uses a variable displacement piston pump to provide power to the hydraulic cylinder 302. The second motor pump unit 111 uses a variable displacement piston pump to provide power to the test motor 301. The third motor pump unit 112 uses a fixed displacement vane pump to replenish hydraulic oil to the loading circuit of the loading motor 305 and remove heat generated in the loading circuit. Check valves 113, 114, and 115 only allow hydraulic oil to flow from the pump into the system, preventing hydraulic oil from flowing back into the pump and thus preventing reverse flow. High-pressure oil filters 116, 117, and 118 effectively prevent impurities from entering the system, ensuring normal system operation.

[0039] The return oil filter 119 filters the return hydraulic oil in the hydraulic system to prevent impurities from entering the hydraulic oil tank. The proportional relief valve 120, by adjusting the signal of the proportional solenoid BDT1, can set its pressure, thereby adjusting the lateral load force output by the hydraulic cylinder 302. The proportional relief valve 121, by adjusting the signal of the proportional solenoid BDT2, can set its pressure, thereby adjusting the system pressure supplied to the test motor 301. Pressure sensors 123 and 124 transmit the actual pressure signal of the system pipeline to the measurement and control system 4 in real time. When the hydraulic oil pressure is set to 10 bar by the solenoid relief valve 122, the solenoid DT1 of the solenoid relief valve 122 is energized, and the hydraulic oil output by the motor pump group 3 112 enters the loading oil circuit.

[0040] refer to Figure 1 As shown, the test control unit 2 mainly includes a proportional speed control valve 201, a flow meter 1 202, a flow meter 2 203, a relief valve 1 204, an electro-hydraulic directional valve 1 205, an electro-hydraulic directional valve 2 206, a solenoid directional valve 207, an accumulator 208, a pressure sensor 3 209, a pressure sensor 4 210, a pressure sensor 5 211, a pressure sensor 6 212, a pressure sensor 7 213, a relief valve 2 214, a cooler 215, a rectifier assembly 216, a proportional relief valve 3 217, a solenoid ball valve 218, a check valve 8 219, and an electro-hydraulic directional valve 3 220.

[0041] The hydraulic oil flow rate entering the test motor 301 through the proportional speed control valve 201 can be adjusted by regulating the signal of the proportional electromagnet BDT3, thereby controlling the speed of the test motor 301. Flow meter 1 202 measures the hydraulic oil flow rate entering the test motor 301 and transmits the flow signal to the measurement and control system 4 in real time; flow meter 203 measures the hydraulic oil leakage flow rate of the test motor 301 and transmits the flow signal to the measurement and control system 4 in real time. Relief valve 1 204 sets the outlet back pressure of the test motor 301. Electro-hydraulic directional valves 1 205, 2 206, 207, and 3 220 control the opening and closing of the hydraulic oil circuit. Accumulator 208 stores hydraulic oil. Pressure sensors 3 209, 4 210, 5 211, 6 212, and 7 213 transmit the actual pressure signal of the system pipeline to the measurement and control system 4 in real time. Overflow valve 214 can set the safety pressure of the loading oil circuit to prevent damage caused by accidental impacts. Cooler 215 circulates cooling water, exchanging heat with the hydraulic oil in the hydraulic system to remove heat and maintain the loading system at a suitable operating temperature. Rectifier assembly 216 is composed of four check valves (check valve four 216.1, check valve five 216.2, check valve six 216.3, and check valve seven 216.4) (see reference). Figure 2 As shown, the loading motor 305 can load the hydraulic circuit in both forward and reverse rotation. The proportional relief valve 217, by adjusting the signal of the proportional solenoid BDT4, can set its pressure, thereby adjusting the pressure of the loading hydraulic circuit of the loading motor 305. The check valve 219 only allows hydraulic oil to enter the loading circuit.

[0042] refer to Figure 1 As shown, the test bench 3 includes a test motor 301, a hydraulic cylinder 302, a force sensor 303, a torque meter 304, a loading motor 305, a magnetic powder brake 306, a synchronous belt 307, a drive shaft 308, and an electromagnetic clutch 309.

[0043] A force sensor 303 is installed on the piston rod end of the hydraulic cylinder 302. When oil enters the rodless chamber of the hydraulic cylinder 302, the piston rod extends, driving the force sensor 303 to act on the drive shaft 308 of the test bench 3, applying a lateral load to the test motor 301. The force sensor 303 transmits the lateral load force to the measurement and control system 4 in real time. The torque meter 304 can measure torque and speed, and transmit the relevant data to the measurement and control system 4 in real time. The loading motor 305 is a proportional variable motor. By adjusting the given proportional electromagnet BDT5 signal, the displacement of the loading motor 305 is set to be 10% larger than that of the test motor 301 to achieve loading. The loading motor 305 is mainly used for loading the durability test of the test motor 301. The magnetic powder brake 306 is connected to the drive shaft 308 via the synchronous belt 307. When the magnetic powder brake 306 needs to be loaded, the loading motor 305 is disengaged from the drive shaft 308, and the electromagnetic clutch 309 is energized. At this time, the magnetic powder brake 306 can load the test motor 301. Different loading forces can be achieved by giving different control signals to the magnetic powder brake.

[0044] The measurement and control system 4 mainly consists of a power cabinet 400 and a control cabinet 401, which completes the electrical control and testing of the measurement and control system. Analog signals such as those from pressure sensors, force sensors, flow meters, and proportional valve control signals, as well as the switching signals from solenoid valves, are all processed by the measurement and control system 4. Specifically, the power cabinet 400 is used to control the start and stop of the power components, and the control cabinet 401 is used to receive signals from pressure sensors, force sensors, etc., and to issue control signals according to testing requirements.

[0045] The working principle of this hydraulic motor testing system is as follows:

[0046] When motor pump unit 3 (112) starts, the solenoid DT1 of the electromagnetic relief valve 122 is energized. The pressure oil output from motor pump unit 3 (112) enters the loading oil circuit through check valve 8 (219) and cooler 215, filling the loading oil circuit with hydraulic oil. Motor pump unit 1 (110) and motor pump unit 2 (111) start. The solenoid DT9 of electro-hydraulic directional valve 3 (220) is energized. The proportional solenoid BDT2 of proportional relief valve 2 (121) provides a pressure signal, and the proportional solenoid BDT3 of proportional speed control valve 201 provides a flow signal. At this time, the hydraulic oil output from motor pump unit 2 (111) returns to the oil tank device 100 through check valve 2 (114), high-pressure oil filter 2 (117), proportional speed control valve 201, flow meter 1 (202), electro-hydraulic directional valve 3 (220), and return oil filter 119. The flow rate fed back by flow meter 1 (202) can calibrate the given signal of proportional speed control valve 201, realizing the self-calibration of the given flow rate of test motor 301. The above principle is referenced. Figure 3 As shown.

[0047] Once the power system is ready for testing, the working principle will be described in detail below, taking into account the test items and loading methods:

[0048] When loading motor 305 is applied and a durability test is conducted, the drive shaft of loading motor 305 is connected to drive shaft 308. Electromagnet DT2 of electro-hydraulic directional valve 1 205 is energized, electromagnet DT7 of electromagnetic ball valve 218 is energized, electromagnet DT1 of electromagnetic relief valve 122 is energized, and electromagnet DT3 of electro-hydraulic directional valve 206 is energized. The proportional electromagnet BDT2 of proportional relief valve 2 121 is given a signal, and the proportional electromagnet BDT3 of proportional speed control valve 201 is given a signal. The hydraulic oil output from motor pump set 2 111 enters the oil port 1 of test motor 301 through check valve 2 114, high-pressure oil filter 2 117, proportional speed control valve 201, flow meter 1 202, and electro-hydraulic directional valve 2 206, causing test motor 301 to rotate. The hydraulic oil flows out from the oil port 2 of test motor 301, passes through electro-hydraulic directional valve 2 206, electro-hydraulic directional valve 1 205, and return oil filter 119, and returns to the oil tank device 100. The rotation of the test motor 301 is transmitted to the loading motor 305 via the drive shaft 308, thereby driving the loading motor 305 to rotate. Hydraulic oil flows out from port 2 of the loading motor 305, passes through the one-way valve 216.1 of the rectifier assembly 216, the proportional relief valve 217, the cooler 215, and the one-way valve 216.3 of the rectifier assembly 216, and returns to port 1 of the loading motor 305, thus forming a closed loading circuit. At this time, by adjusting the proportional solenoid BDT4 signal of the proportional relief valve 217, the test motor 301 can be loaded. By adjusting the setpoint signals of the proportional solenoids BDT2 of the matching proportional relief valve 211 and BDT4 of the proportional relief valve 217, loading of the test motor 301 under different pressures can be achieved; by adjusting the setpoint signal of the proportional solenoid BDT3 of the proportional speed control valve 201, loading of the test motor 301 at different speeds can be achieved. During the loading test, the leaking oil from the test motor 301 returns to the oil tank device 100 via the solenoid ball valve 218; pressure sensors 3 (209), 4 (210), 5 (211), and 6 (212) transmit pressure signals to the measurement and control system 4; the torque meter 304 transmits torque and speed signals to the control system 4 in real time. The above test principle is referenced from [reference needed]. Figure 4 As shown.

[0049] For reverse rotation testing, under the above operating conditions, simply energize the electromagnet DT4 of the electro-hydraulic directional valve 206. The hydraulic oil output from the motor pump unit 211 enters port 2 of the test motor 301, and flows out from port 1 of the test motor 301. The hydraulic oil in the loading circuit flows out from port 1 of the loading motor 305, passes through check valve 216.2 of the rectifier assembly 216, proportional relief valve 217, cooler 215, and check valve 216.4 of the rectifier assembly 216, and returns to port 2 of the loading motor 305. The above test principle is referenced [reference needed]. Figure 5 As shown.

[0050] When the magnetic powder brake 306 is loaded and tests are conducted on displacement, leakage, and torque, the loading motor 305 is disengaged from the drive shaft 308, and the electromagnetic clutch 309 is energized. At this time, the magnetic powder brake 306 is loaded as the test motor. Electromagnet DT2 of electro-hydraulic directional valve 1 205 is energized, electromagnet DT1 of electromagnetic relief valve 122 is energized, and electromagnet DT3 of electro-hydraulic directional valve 206 is energized. The proportional electromagnet BDT2 of proportional relief valve 2 121 is given a signal, and the proportional electromagnet BDT3 of proportional speed control valve 201 is given a signal. The hydraulic oil output from motor pump set 2 111 passes through check valve 2 114, high-pressure oil filter 2 117, proportional speed control valve 201, flow meter 1 202, and electro-hydraulic directional valve 2 206 and enters the oil port 1 of test motor 301, causing test motor 301 to rotate. The hydraulic oil flows out from the oil port 2 of test motor 301, passes through electro-hydraulic directional valve 2 206, electro-hydraulic directional valve 1 205, and return oil filter 119 and returns to the oil tank device 100. The rotation of the test motor 301 is transmitted to the magnetic powder brake 306 via the drive shaft 308 and synchronous belt 307. At this time, the measurement and control system 4 provides different control signals to the magnetic powder brake 306, thus achieving different loading forces. By adjusting the proportional electromagnet BDT3 signal of the given proportional speed control valve 201, loading at different speeds of the test motor 301 can be achieved. During the loading test, the leaking oil from the test motor 301 returns to the oil tank device 100 via flow meter 203. Flow meters 202 and 203 transmit flow signals to the measurement and control system 4 in real time; pressure sensors 209, 210, 211, and 212 transmit pressure signals to the measurement and control system 4 in real time; and the torque meter 304 transmits torque and speed signals to the measurement and control system 4 in real time. The above test principle is based on [reference needed]. Figure 6 As shown. To perform a reverse rotation test, under the above operating conditions, simply energize the electromagnet DT4 of the electro-hydraulic directional valve 206.

[0051] In the back pressure loading test, when the test motor 301 needs to undergo a back pressure loading test, the electro-hydraulic directional valve 205 is de-energized. The hydraulic oil flowing out of the test motor 301 returns to the oil tank device 100 through the electro-hydraulic directional valve 206, the relief valve 204, and the return oil filter 119. At this time, different back pressures can be set by adjusting the pressure of the relief valve 204. This test can be performed independently or under the loading conditions of the magnetic powder brake or the loading motor. The above test principle is referenced. Figure 7 As shown.

[0052] During the lateral load test, when the test motor 301 needs to undergo a lateral load test, the electromagnet DT5 of the electromagnetic directional valve 207 is energized, and the proportional electromagnet BDT1 of the proportional relief valve 120 provides a signal. The hydraulic oil output from the motor pump set 110 passes through the check valve 113, the high-pressure oil filter 116, and the electromagnetic directional valve 207 into the rodless chamber of the hydraulic cylinder 302. The piston rod of the hydraulic cylinder 302 extends, driving the force sensor 303 to act on the drive shaft 308 of the test bench 3, applying a lateral load to the test motor 301. The force sensor 303 transmits the lateral load force to the measurement and control system 4 in real time. The hydraulic oil in the rod chamber of the hydraulic cylinder 302 returns to the oil tank device 100 through the electromagnetic directional valve 207. Hydraulic oil output from motor pump unit 110 enters the rodless chamber of hydraulic cylinder 302 through check valve 113 and is simultaneously stored in accumulator 208. When the lateral load force reaches a set value, the electromagnet of solenoid directional valve 207 is de-energized, and the pressure oil stored in accumulator 208 maintains the lateral load force. This test can be performed independently or during magnetic powder brake loading, loading motor loading, or back pressure loading tests. When a lateral load test is not required, electromagnet DT6 of solenoid directional valve 207 is energized, and proportional electromagnet BDT1 of proportional relief valve 120 provides a signal. Hydraulic oil output from motor pump unit 110 enters the rod chamber of hydraulic cylinder 302 through check valve 113, high-pressure oil filter 116, and solenoid directional valve 207. The hydraulic cylinder piston rod retracts, and after the drive sensor 303 disengages from the drive shaft 308, solenoid directional valve 207 is de-energized, locking hydraulic cylinder 302.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic motor testing system with multiple loading methods, characterized in that, This includes the power system, test control unit, test bench, and measurement and control system; The power system includes an oil tank unit and a pump unit, which provide a power source for the entire system; the pump unit includes a variable displacement piston pump and a fixed displacement vane pump. The test control unit is used to receive control signals from the test and control system and drive the execution unit to work; It includes a proportional speed control valve, a relief valve, a rectifier assembly, and a proportional relief valve; The proportional speed control valve is used to adjust the hydraulic oil volume of the test motor; The relief valve is used to set the outlet back pressure of the test motor; The rectifier assembly consists of four check valves, which enable the hydraulic circuit to be loaded when the loading motor rotates forward and reverse. The proportional relief valve is used to adjust the pressure of the hydraulic circuit of the loading motor; The test bench includes a test motor, a torque meter, and a loading motor; The test motor, torque meter, and loading motor are connected by a drive shaft; the loading motor is used for loading in the motor durability test; the torque meter transmits the measured data to the measurement and control system in real time. The measurement and control system includes a power cabinet and a control cabinet, which are used to complete the electrical control and testing of the system.

2. The hydraulic motor testing system with multiple loading methods according to claim 1, characterized in that, The power system also includes: Two proportional relief valves are used to adjust the lateral load force output by the hydraulic cylinder and the system pressure supplied to the test motor, respectively. The pressure sensor transmits the actual pressure signal of the system pipeline to the measurement and control system in real time.

3. The hydraulic motor testing system with multiple loading methods according to claim 1, characterized in that, The test control unit also includes: Two flow meters are used: one to measure the flow rate of hydraulic oil entering the test motor and transmits the flow signal to the measurement and control system in real time; the other to measure the flow rate of hydraulic oil leaking from the test motor and transmit the flow signal to the measurement and control system in real time.

4. The hydraulic motor testing system with multiple loading methods according to claim 1, characterized in that, The test bench also includes: The magnetic powder brake is connected to the drive shaft via a synchronous belt to provide loading force to the test motor.

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