中文摘要：

针对具有高压引流和二级节流新型结构阀口的先导式纯水溢流阀进行仿真和试验研究,建立阀的AMESim仿真模型,分析先导阀导向间隙、阻尼孔直径、敏感腔体积、阀芯质量以及弹簧刚度等不同参数对先导式纯水溢流阀特性的影响,在纯水液压综合性能试验台上进行先导式纯水溢流阀的静动态试验,并对仿真和试验结果进行对比分析。仿真与试验结果表明,液阻直径是先导式纯水溢流阀最主要的影响参数,而阀芯质量变化的影响则基本可以忽略;在小于20 L/min的小流量工况下的定压精度较低,而大于20 L/min的大流量工况下的定压精度较高;阀的动态响应试验表明,入口压力超调量小于30%,并且压力上升时间小于80 ms。

英文摘要：

The simulation and experiments on pilot-operated water hydraulic relief valve are carried out in our lab.The structure of the main valve port is characterized with high-pressure induct and two-step restrictor.The AMESim model of the valve is built.The influence parameters,such as guide clearance of pilot valve,diameter of damping orifice,volume of sensitive cavity,mass of valve core,and spring stiffness,are investigated through simulation.The static and dynamic experiments are carried out on the water hydraulic comprehensive test-rig to test the valve performance.The simulation and test results are compared and analyzed,which shows that the effect of spool mass can be neglected,but the diameter of damping orifice has great effect.The setting-pressure accuracy is low at small flow rate below 20 L/min,but the high accuracy is achieved over 20 L/min.The experiments about valve dynamic response show that the overshoot of inlet pressure is no more than 30% and the pressure rise time is less than 80 ms.