Comprehensive  Hydraulic pump and piston motor and multi-valve test stand

The design scheme of this test bench is composed of pump test station, motor test

station, multi-valve group test station and hydraulic cylinder test station. The pump

and motor test station can provide open pump loading test and closed pump loading

test. , Closed pump + closed motor joint loading test three test modes. The hydraulic

oil source system provides clean oil for each test station, and has the functions of oil

circulation filtration, cooling, recovery, oil replenishment, flow monitoring, torque

speed measurement, etc. The maximum power of the pump test station is 160KW, the

maximum test pressure is 42MPa, and the proportional relief valve is used for loading. It is mainly composed of a frequency conversion motor, a torque speed sensor, a

solenoid valve, and a loading relief valve. The conversion of closed circuit and open

circuit completes the test content of the pump. The high-speed motor test station is

mainly composed of a reversing control circuit, a hydraulic rectifier bridge circuit, a

torque speed sensor, a loading motor, and an oil supply circuit, etc., and can carry out

closed loading of the motor. The low-speed motor test station is mainly composed of a

reversing control circuit, a hydraulic rectifier bridge, a torque speed sensor, a loading

motor, and an oil supply circuit. The station of the load-sensing multi-valve group

adopts proportional overflow loading, which can simultaneously carry out pressure

loading and flow measurement of two valves. The loading oil source is provided by

the tested pump, and the power of the driving motor is 160KW. The maximum test

pressure can reach 42MPa, mainly composed of hydraulic rectification bridge, loading

relief valve, and decompression control circuit. In the hydraulic cylinder test station, the oil replenishment circuit uses a motor and a gear pump to provide clean hydraulic

oil with a suitable temperature and viscosity for the closed circuit to replenish oil. The

system is equipped with an air cooler to ensure that the heat generated by the system

is dissipated in time to prevent the oil temperature of the system from being too high. In order to ensure a clean environment on site, an oil leakage recovery and filtration

circuit is separately set up to draw the oil leaked when the test piece is replaced back

to the oil tank. The measurement and control system completes the functions of test

bench power source control, solenoid valve logic control, proportional valve control, safety protection, status display, alarm prompt, parameter setting, real-time display of

test data, curve drawing, data processing, etc.