Abstract：In order to optimize the spring of the reciprocating pump valve and establish the best spring factor matching, the unsteady opening-closing process of the poppet valve was simulated. The simulation based on computational fluid dynamics approach, and the dynamic-grid technology and User Defined Function was conducted to depict the law of motion of the poppet valve. The simulation results show that the spring stiffness and initial force have important effect on the poppet valve′s opening displacement, the delay-closing time and the closing velocity, and there must be an optimal matching between those two spring factors. With the help of performance test of reciprocating pump, the design for the spring was validated. An experiment-bed was also built to test the poppet valve′s lift displacement. The testing results prove that the simulation was in a correct way. The research method could be applied in the designing and optimizing of reciprocating pump valve.
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