一种冲击器钎头体的疲劳强度分析

Fatigue strength analysis of drill bitefor down hole hammer

冲击器在工作过程中,由于岩屑等固态物质进入其内腔造成了冲击器卡滞、冲击无力等故障.为了排除这些故障,我们对现有冲击器钎头进行了局部优化改进.通过对冲击器的原钎头体和改进后的钎头体分别进行疲劳强度分析,对比结果得出改进后的钎头体的疲劳寿命满足设计要求.

Down hole hammer is sluggish and inability to impact in working process,because of debris and solid matter enter the inner cavity of it.In order to removethefault for down hole hammer,we improve the partial design of drill bite.We make acontrastive analysis ofthe fatigue strength of the previous drill bit and the modified drill bit,the results show that fatigue life of the modified drill bite for down hole hammer can meet the design requirement.