冲击器是潜孔钻机的主要工作机构,它的性能直接影响钻机的生产率。风动工具的使用已有一百多年的历史;但到目前为止,还缺少关于活塞运行的完善计算方法。由于对冲程、回程运动,以及换向过程难以观察了解,只能依靠想像来估计活塞的运动状态。近年来,由于现代测试技术的应用,获得了活塞位移和气缸内风压变化的相对数据,对于分析活塞运动规律提供了科学依据。 Impactor is the main working mechanism of DTH drilling rig, its performance directly affects the productivity of drilling rig. The use of pneumatic tools has been more than a hundred years old; but so far there has been no complete calculation of how the pistons operate. Due to the stroke, the return movement, and the reversing process is difficult to observe and understand, can only rely on the imagination to estimate the piston movement. In recent years, due to the application of modern testing technology, the relative data of piston displacement and air pressure variation in cylinder are obtained, which provides a scientific basis for analyzing the law of piston movement.