In this paper the operating principle, structural features and applications in production of YYG series of hydraulic drills will be described.
2
根据水压凿岩机液压传动原理和使用要求，详细介绍了凿岩机中冲击器、操纵阀和支腿的结构特点和设计方法。
According to the drive mechanism and the demand of the hydraulic rock drill, the structure character and the designing ways of the impact device, control valve and supporting arm were introduced.
3
本文介绍了液压凿岩机性能参数测试仪的工作原理、系统框图、主要技术指标及使用情况。
This paper describes the operating principle, the block diagram for the system, the specifications and applications of model YXCH-1 tester of parameters for hydraulic drills.
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