关键词: 单向阀, 流量特性, 配流, 优化设计

Abstract: Aiming at the flow bottleneck of the smart material driven pump applying check valves to rectification, the influence of check valves on the high frequency reciprocation pump flow characteristics is studied, and the key parameters of the pump system are optimized. Internal fluid and rigid dynamics of a conical poppet check valve are modeled, and the pump system utilizing this type of check valves is modeled. To analyze the flow rate restriction of check valve bandwidth, the pump system working process of different piston motion frequencies and the same structural parameters is simulated. To analyze the other factors of the flow rate restriction on the premise that the bandwidth of check valves meets system requirement, the pump system working process of different piston motion frequencies with which the structural parameters vary is simulated. By comparison of simulations, it is proposed that the better way of pump flowrate control is motion amplitude adjustment. Adopting particle swarm optinization method, the key parameters are optimized, with the goal of the flowrate or the volume efficiency of pump system, and the relevant optimal performance of passive rectification pump system is observed.

Key words: Check valve, Flow rectification, Flowrate characteristics, Optimization design