In coal mining machine,we measure the dynamic inst ability of pilot operated re-lief-valve through changing damping and srudy how the damping affects dynamic instability of relief-valve.

• 在采煤机中,通过改变阻尼参数,测定先导式溢流阀的动态不稳定性能,研究阻尼对溢流阀不稳定性能的影响。