一、前言目前工程上应用的液压换向阀,绝大多数是滑阀式的。为了提高换向阀的可靠性和缩短动作时间,出现了一种新形的钢球式的流体元件,它具有以下优点: 1、从原理上消除了产生液压卡紧的根源,故动可靠性大大提高,切换时间很短,可达O。5~10毫秒; First, the foreword At present engineering application of hydraulic valve, the vast majority are spool valve type. In order to improve the reliability of reversing valve and shorten the operating time, a new type of steel ball fluid element has emerged, which has the following advantages: 1, in principle, eliminate the root causes of hydraulic clamping, so reliability Greatly improved, switching time is very short, up to O. 5 to 10 milliseconds;