基于GMA的液压高速开关阀特性分析

The performance of hydraulic high-speed on-off valve based on GMA

设计了基于GMA的液压高速开关阀,针对所设计的高速开关阀进行了静动态特性研究,建立其数学模型,通过数字仿真表明新型高速开关阀的开关时间为1.7 ms和1.9 ms,空载流量达20 l/min以上,并且分析了各参数对高速开关阀的性能影响,得出等效质量越大,阀芯开启上升时间越快,阀芯位移波动现象越严重;黏性阻尼越大,阀芯开启时间越慢,但阀芯位移波动越小;线圈参数对高速开关阀的开关时间影响很大,相同电阻时线圈时间常数越小,则阀芯开关时间越短,反之则越慢。

This paper designs the hydraulic high -speed switching valve based on GMA .This paper conducts study on the static and dynamic characteristics of the designed high -speed on-off valve , de-velops mathematical model .The switching time of the new -type high-speed on-off valve is 1.7 ms and 1.9 ms through digital simulation , no-load flow is above 20 l/min, and analyzes parameters influ-ence on the performance of high -speed on-off valve .It concludes that greater equivalent mass makes the valve core open faster , the valve core displacement has obvious fluctuation .Greater viscous damping makes the valve core open slower , but the valve core displacement has no obvious fluctuation .Coil pa-rameters have great influence on the switching time of the high -speed on-off valve.Under the same re-sistance , smaller time constant makes the valve core switches a shorter time , larger time constant makes the valve core switches a longer time .