高风压露天潜孔钻车(如图1示)是矿山、煤矿开采、铁路施工中必不可少的工程机械。当它正常工作时需将凿岩头(图1中2,4)伸出一定高度潜孔,由于凿岩头工作时强力冲击振动,加之机架的本身自重,所以对油缸要求具有特殊的自锁性能;这里所介绍的是美国英格索兰矿山工程机械有限公司制造的高风压露天潜孔钻车中液压锁油缸;它结构简单、 High-pressure open-air DTH drilling rigs (Figure 1) is an indispensable construction machinery in mines, coal mining, railway construction. When it works normally, it needs to extend the drilling head (2 and 4 in Figure 1) to a certain height for deep hole. Due to the strong impact vibration when the drilling head works and the weight of the frame itself, it is required to have a special self Lock performance; here is the United States Ingersoll Rand Mining Engineering Machinery Co., Ltd. to create high-pressure open-air DTH drilling rig hydraulic lock cylinder; it is simple in structure,