大直径气动潜孔锤动力学过程分析  

Analysis of kinetic process of large pneumatic down-the-hole hammer

作　　者：訚耀保[1] 黄帅[1] 王康景[1] 郭传新[2] 

机构地区：[1]同济大学机械与能源工程学院,上海200092 [2]北京建筑机械化研究院,北京100007

出　　处：《中南大学学报（自然科学版）》2014年第3期721-726,共6页Journal of Central South University:Science and Technology

基　　金：国家科技支撑计划("973"计划)项目(2011BAJ02B06);国家自然科学基金资助项目(51175378;51275356);航空科学基金资助项目(20120738001;20128038003)

摘　　要：建立大直径气动潜孔锤的数学建模,通过动态过程数值模拟分析不同供气压力下气动潜孔锤结构参数对性能的影响。结果表明:过大的供气压力将使活塞超出设定行程,过小的供气压力无法形成较大的冲击频率。活塞低速时进气腔出现压力波动现象,这是由于进气量和容腔变化量相互作用引起的,可通过增大进气通道面积,减少压力波动。The large pneumatic DTH （down-the-hole） hammer was designed. The working principle was analyzed and the mathematical model was built. With programming and numerical simulation of the dynamic process in MATLAB, the simulation results were compared under different input air pressures. The results show that the overlarge input pressure made the piston exceed the range and too low input pressure was unable to generate a proper impact frequency. The phenomenon of pressure oscillation happening in the inlet chamber during the process of dynamic simulation is caused by interaction of flowing gas and changing chamber. The pressure oscillation can be decreased by means of increasing the flow area.

关 键 词：大直径潜孔锤 数值仿真 压力波动 入岩 气动 

分 类 号：TH47[机械工程—机械制造及自动化]