Abstract:Compared to the situation that the conventional rotating swashplate axial piston pump piston motion curve is unique, the piston motion curves of linear motor driven water hydraulic piston pump have features on programming. Triangular velocity curve, S velocity curve and index velocity curve were selected as usually used motion planning and the distributing valves static and dynamic properties of different piston motion curves were analyzed. In addition, applied on NLPQL algorithm the distributing valve itself sensitive parameters were optimized to achieve the best parameters of spring stiffness, pretightening force and the valves structural size. The simulation result shows that index velocity curve is not fitted as linear motor motion planning and pressure pulsation is the minimum under the planning of triangular velocity curve. At the same time, piston motion frequency should not be integer multiple of valve natural frequency and less than the limited response frequency. Finally, pump experiment tests validate previous simulation and this paper provide the technical guidance for practical application.