冲旋钻头结构对其寿命及破岩效率的影响研究  

Effect of structure of percussion-rotary bit on its service life and rock breaking performance

作　　者：徐海良[1] 郑义[1] 赵宏强[1] 徐绍军[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《合肥工业大学学报（自然科学版）》2017年第12期1599-1603,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51375499)

摘　　要：为研究气体冲旋钻头结构对其破岩性能的影响,文章采用非线性有限元分析软件ANSYS/LS-DYNA,以岩石力学和有限元理论为基础,选择适合岩石侵彻问题的Drucker-Prager本构模型,建立了气体冲旋钻头破岩的有限元模型,模拟不同结构气体冲旋钻头破岩的过程,得到了钻头破岩过程中力与时间的变化曲线以及平均力、比能随结构参数变化的曲线;当第2齿面倾角取25°、第3齿面倾角取44°、露齿高度取7.25mm、钻齿半径取6.75mm时,钻头所受的阻力平均值和钻头破岩所需比能较小,有利于延长气体冲旋钻头的使用寿命,并能提高能量利用率。In order to study the effect of the structure of air percussion-rotary bit on its rock breakingperformance,the nonlinear finite element software ANSYS/LS-DYNA was adopted. According to rock mechanics and finite element theory,a Drucker-Prager constitutive model was setration problems of rock, and the finite element model of air percussion-rotary bit was then established to simulate the process of rock breaking by air percussion-rotary bits with different structures. Thecurves of resultant force varying with time, the relation curves of average resultant energy varying with structure parameters were gotten. When the second and thangle of the air percussion-rotary bit,the height and radius of the teeth of the air percussion-rotary bit was 25°,44°,7. 25 mm and 6. 75 mm,respectively,the average resultant force and specific energywere relatively smaller. This can help to prolong the service life of the air percussion-rotary bit and toimprove energy utilization.

关 键 词：冲旋钻头 ANSYS/LS-DYNA软件 有限元 齿面倾角 载荷波动 

分 类 号：TH47[机械工程—机械制造及自动化]