大冲击功液动锤的研究及其应用

Research on Large Impact Energy Hydro - hammer and its Application

从液动锤基础理论出发，依据理论计算公式，科学建立数学模型，开发计算机软件，对波动锤内部动力过程及工作参数进行计算机模拟仿真电算，寻求大幅度提高冲击功的途径和方法．以ＳＣ－５４型小口径射流式液动锤为实验研究对象，理论研究与实际实验研究相结合，使其冲击能比原有值大幅度提高，展示了液动锤的良好发展前景。将实验室实测数据与电算程序进行拟合，使电算值与实测值高度吻合，进而实现波动锤的计算机辅助优化设计。

rilling of hard rock and control of deviation are the greatest difficulty in continental scientific drilling. The practice of drilling has proved that hydro -hammer drilling technique is a kindof efficient method to solve the problem, a lot of drilling experts home and abroad suggest toadvocate the hydro - hammer drilling technique in scientific drilling.,But, at present, hydro hammers are all of small impact energy which can' t bring about efficient volumetric fragmentation and good ROP. So close attention is paid on research on large energy hydro - hammer bydrilling experts in China.The hydro - hammer is first invented in China. It is simple in structure, reliable, has longservice life, high temperature, and high surrounding pressure resistance. An experiment on onetype of this drill has been done successfully under the simulated deep hole conditions in instituteof Clausthal University in Germany. When the surrounding pressure is 400 bar, it can stillwork normally.The dynamic mathematical model is established through the detailed theoretical analysis ofthe operating parameters of the hydro - hammer. The internal power process is revealed by themicro - computer calculation. A lot of experiment is made on the basis of a set of Z54mm hydro- hammer. The most efficient way of increasing impact energy is. found. An optimum design onhydro - hammer operating parameters has been fulfilled.Input the data into the computer and correct some coefficient again, at last the main structural parameters of hydro - hammer are simulated and a set of 152mm wireline coring liquiddriven drill is designed, its impact energy is 300￣400J and impact frequency is 20￣27Hz.