Research on Influence of Damping Groove Position of Valve Plate on Performance of Piston Pump.

Flow pulsation and cavitation are the main indicators for evaluating the performance of axial piston pumps, the damping groove is a key structural parameter of the valve plate of the piston pump, and the use of damping groove for pre-boosting and pre-unloading is currently an effective way to reduce flow pulsation and cavitation. At present, many scholars and researchers have conducted extensive analysis on valve plates of piston pumps, but there is a lack of corresponding research on the positional parameters of the damping groove. The influence of positional parameters of the damping groove of the valve plate on the performance of the piston pump is studied, three-dimensional modelling is carried out in Solidworks, and five groups of valve plates with damping grooves at different positions are established from inside to outside. The flow pulsation and cavitation of valve plates with damping grooves at different positions are compared, analyzed and studied. The simulation results show that the damping groove at the edge position corresponds to a larger flow pulsation, and when high-pressure zone turns into low-pressure zone or low-pressure zone turns into high-pressure zone, different damping groove positions have a great impact on cavitation, while asymmetric design of damping groove positions can effectively reduce the damage of cavitation. The research results provide theoretical support for the optimization of valve plates and play a major role in improving the performance and life of axial piston pumps. [ABSTRACT FROM AUTHOR]