Optimal Design on the Drag Reduction Structure for the Cylinder of Percussion-Compact DTH Hammer
In order to reduce the frictional resistance of the percussion-compact DTH hammer which was used for trenchless pipeline laying and improve its drilling efficiency,a series of cylinders with the drag reduction structural were designed.Then,the progress of the cylinder drilling was simulated by ANSYS/LS-DYNA finite element analysis software.Lastly,their respective drilling efficiencies were analyzed scientifically.The results show that: the cylinder with the drag reduction structural applied to percussion-compact DTH hammer is feasible and its drilling efficiency is much better than the conventional cylinder;Furthermore,the effect of the drag reduction was influenced by the angel of blade cone (Anc) 、the number of the thick segment (N) 、the diameter of thick segment(D)、the slenderness ratio of the thick segment(Sr) and the location of the thick segment (Los) ;As to the Φ130mm cylinder,Anc =20°,N=1,D=134mm,Sr=1.5,and Los at the bottom of the cylinder is an ideal parameter combination.
Percussion-Compact DTH Hammer Cylinder LS-DYNA Drag Reduction Structure Optimization
Zhiqiang Zhao Kun Yin Lina Cao Yongguang Zhang
Doctor, College of Construction Engineering, Jilin University; NO.938,West Minzhu Street, Changchun Professor, College of Construction Engineering, Jilin University; NO.938, West Minzhu Street, Changc Master, School of Basic Science, Changchun University of Technology; NO.2055,Yanan Street, Changchun Doctor, Infrastructure Department, Changchun Institute of Optics. Fine Mechanics and Physics, Chines
国际会议
北京
英文
1732-1742
2012-10-14（万方平台首次上网日期，不代表论文的发表时间）