Abstract: The provided is an in-situ test device and method for a friction characteristic of an interface of a valve plate pair in a cam-lobe radial piston hydraulic motor. A transmission shaft of a valve plate pair realistic-simulation module is connected to a motor; and the valve plate pair realistic-simulation module is threadedly connected to a valve plate pair guide module. By controlling a rotational speed of the motor and pressures of high-pressure and low-pressure port windows of a valve plate, the provided can realistically reproduce high-pressure and low-pressure port distribution functions of the valve plate pair in the hydraulic motor and simulate a wear state of the interface between the valve plate and the cylinder block, such that the friction characteristic of the interface of the valve plate pair is the same as an in-situ test result.

Abstract: The present application discloses a testing device and a testing method for multiple piston assembly of a cam-lobe hydraulic motor. N cylinder blocks are installed on the cylinder block base, and piston assemblies to be tested are installed on the cylinder blocks. A driving plate is installed on the cylinder block base, and N uniformly-distributed driving plate clamping grooves are formed in the driving plate. A cylinder block protrusion is arranged at the bottom of each cylinder block, and the cylinder block protrusions are clamped in the driving plate clamping grooves. When the driving plate is rotated, the N driving plate clamping grooves drive the N cylinder blocks to rotate synchronously through the cylinder block protrusions, to synchronously change the pressure angle between a driving shaft and each piston assembly.

Abstract: The present application discloses a testing device and a testing method for multiple piston assembly of a cam-lobe hydraulic motor. N cylinder blocks are installed on the cylinder block base, and piston assemblies to be tested are installed on the cylinder blocks. A driving plate is installed on the cylinder block base, and N uniformly-distributed driving plate clamping grooves are formed in the driving plate. A cylinder block protrusion is arranged at the bottom of each cylinder block, and the cylinder block protrusions are clamped in the driving plate clamping grooves. When the driving plate is rotated, the N driving plate clamping grooves drive the N cylinder blocks to rotate synchronously through the cylinder block protrusions, to synchronously change the pressure angle between a driving shaft and each piston assembly.