液压冲击机构结构类型分析

Type analysis of the structure of the hydraulic impulse mechanics

分析了有阀型液压凿岩机三种配油方式的优缺点，指出后腔回油式的液压凿岩机具有较多的优势，是应首选的结构形式。

The hydraulic rock drill with back return has been presented many advantages by analyzing the merits and demerits of the three kinds of oil distribution mode of the drill with valve,so this structure has priority te select.