摘要
卡爪作为棘爪步行器的主要承载部件,直接影响着钻机平移。在受力分析的基础上,利用力学原理与方法,分析推导获得斜面卡爪结构的失效机理及优化方法。实例分析结果表明:斜面卡爪产生附加分力导致其应力值增加,不利于卡爪承载,危险截面出现在卡爪固定处附近;进一步分析得到卡爪失效源于斜面卡爪结构设计缺陷;通过优化卡爪的受力状态、截面参数及制作材质后,卡爪应力值降低量约为54%与77%,这对提高卡爪承载能力是有效的。研究结果可为卡爪的优化设计提供参考。
The claw is used as an important bearing component of the pawl walker,it has directly influence on the rig moving.On the basis of the force analysis,the failure mechanism and optimal method of the inclined claw is obtained by using the mechanic principle and method.The results in the case study show that the inclined claw can produce one additional force,which increases its stress value,that is not conducive to the bearing capacity of the claw,the dangerous section appears near the fixed position of the claw;Further analysis shows that the failure of the claw is caused by the structural design defect of the inclined claw.The load-bearing capacity is effectively improed by optimizing the stress state,section parameters and materials of the claw.The stress value of the claw can be reduced by about 54%and 77%.The research results can be used to provide references for the optimal design of the claw structure.
作者
李建亭
LI Jianting(Engineering Service Management Center of Zhongyuan Petroleum Engineering Co.,Ltd.,Puyang 457001,China)
出处
《机械制造与自动化》
2020年第3期75-77,共3页
Machine Building & Automation
