工农业用凿岩系统冲击机构建模与仿真

工农业实践中一般将冲击机构分为轻、重冲击工作状态。为了解决在荒山开发、矿山开采和山区土地开垦等过程中凿岩机的卡钎、偏斜问题，以WF100型液压凿岩机冲击机构为研究对象，建立系统仿真模型。通过仿真获得液压凿岩系统在重冲击、轻冲击2种工作状态下的工作性能参数。重冲击工作状态下，节流孔等效直径为7 mm，系统压力为12 MPa时，液压凿岩机冲击能达到77 J；节流孔等效直径为7 mm，系统压力为14 MPa时，液压凿岩机冲击能达到98.3 J。轻冲击工作状态下，节流孔等效直径为2.5 mm，系统压力为12 MPa时，液压凿岩机冲击能达到42.5 J；节流孔等效直径为2.5 mm，系统压力为14 MPa时，液压凿岩机冲击能达到53 J。研究结果为冲击结构的设计提供了参考，也可为液压凿岩机在不同状态下工作时保证凿岩工作效率又避免卡钎提供技术指导。 

Modeling and Simulation of Impact Mechanism of Industrial and Agricultural Rock Drilling System

Impact mechanism was divided into light and heavy impact in industrial and agricultural practice.In order to solve problem of jamming and deviation of rock drill in process of barren hill development、mine exploitation and land reclamation，impact mechanism of WF100 hydraulic rock drill was taken as object of study and system simulation model was established.Performance parameters of light or heavy impact working condition of hydraulic rock drill both were obtained through system simulation.Under heavy impact condition，impact energy reached 77 J when equivalent diameter of orifice was 7 mm and system pressure was set to 12 MPa；impact energy reached 98.3 J when equivalent diameter of orifice was 7 mm and system pressure was set to 14 MPa.Under light impact condition，impact energy reached 42.5 J when equivalent diameter of orifice was 2.5 mm and system pressure was set to 12 MPa；impact energy reached 53 J when equivalent diameter of orifice was 2.5 mm and system pressure was set to 14 MPa.Research results could provide reference for design of impact mechanism of hydraulic rock drill，also provide technical guidance for anti jamming and ensure drilling efficiency when hydraulic rock drill work in different conditions.