弹簧性能参数对微灌压力调节器调压效果的影响

Influence of Spring on Pressure Regulating Effect of Micro-irrigation Pressure Regulator

利用流固耦合数值计算方法与样件测试验证方法,分析了弹簧劲度系数和初始应力对压力调节器调压特性及流量的影响。结果表明,弹簧劲度系数和初始应力对压力调节器出口预置压力和流量的影响均呈线性关系,且弹簧初始应力的影响明显大于弹簧劲度系数;压力调节器的临界工作压力与出口预置压力之差随着出口预置压力的增大而增大,且该差值占临界工作压力和出口预置压力的比例随着出口预置压力的增大而线性增加。

The fluid structure interaction method and test specimen testing were used to study the influence of the spring stiffness coefficient and the initial stress on the flux and the regulating characteristic of pressure regulator.The results showed that both the preset outlet pressure and flux were in positive linear relationships with the spring stiffness coefficient and the initial stress.The influence of spring initial stress was greater than the spring stiffness coefficient;the pressure difference between measured critical working pressure and preset outlet pressure increased with the preset outlet pressure.The percentage of pressure difference to measured critical working pressure and preset outlet pressure increased linearly with the preset outlet pressure.