液压冲击器氮气室预充压力对冲击性能的影响研究  

Influence of Precharge Pressure of Nitrogen Chamber on Hydraulic Impactor's Performance

作　　者：梁翠平[1] 杨国平[1] 王亮[1] 丁冲冲[1] 

机构地区：[1]上海工程技术大学,上海201620

出　　处：《机床与液压》2011年第7期15-17,5,共4页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(50975169);上海高校知识创新工程(085工程)建设项目(JZ0901)

摘　　要：在分析液压冲击器工作原理及特点的基础上,建立液压冲击器系统的非线性数学模型。运用MATLAB/Simulink分别对液压冲击器的回程加速过程和冲程过程进行仿真研究,分析氮气室预充压力对冲击器冲击性能的影响程度。结果表明:氮气室预充压力过大,会导致液压油不能推动活塞进行回程,液压冲击器起动不了;压力过小,则很容易使冲击压力升不上去,冲击能小。Based on analyzing the working principle and characteristics of hydraulic impactor,the nonlinear mathematical model of a hydraulic impactor system was established.By using MATLAB/ Simulink,the simulation of two processes including the accelerated return stroke and travel stroke of the hydraulic impactor were researched,and the influence of precharge pressure of nitrogen chamber on the percussion performance was analyzed.The results show that：if the precharge pressure of nitrogen chamber is too large,it will result in hydraulic fluid can not move the piston to return,and hydraulic impactor can not start up;if the pressure is too small,it will induce difficulty to raise the impacting pressure,and the impacting energy will be small.

关 键 词：液压冲击器 氮气室预充压力 

分 类 号：TD422[矿业工程—矿山机电]