圆弧螺纹与普通螺纹锚栓防松性能研究  

Research on anti-loosening performance of arc screw thread and general purpose screw thread anchor bolts

作　　者：杨中桂 白洁 李梦晗 王自强 Zhong-gui YANG;Jie BAI;Meng-han LI;Zi-qiang WANG(Haiwei Zhengzhou High-tech Co.,Ltd.of CSIC,Zhengzhou 450015,China)

机构地区：[1]中船重工海为郑州高科技有限公司,郑州450015

出　　处：《机床与液压》2020年第18期146-151,共6页Machine Tool & Hydraulics

基　　金：国防科工局军用技术推广专项项目(2014-1501)。

摘　　要：针对圆弧螺纹和普通螺纹的锚栓组件,分析了螺纹结构差异,并对螺纹连接松动机理进行了分析。基于有限元方法,计算了不同预紧力栽荷、横向位移栽荷条件下,圆弧螺纹锚栓和普通螺纹锚栓残余预紧力变化情况。结果表明,螺纹连接副在承受横向位移循环栽荷螺母发生松动时,圆弧螺纹锚栓残余预紧力下降可分为快速下降和平稳阶段,且在平稳阶段预紧力下降速度极为缓慢,而普通螺纹锚栓残余预紧力的变化趋势呈线性变化,没有明显的阶梯性,而且圆弧螺纹锚栓残余预紧力下降速度始终低于普通螺纹锚栓,故圆弧螺纹锚栓的综合防松效果要优于普遍螺纹锚栓。In this paper,the difference of thread structure and loosening mechanisrm betw^een arc thread and general thread anchor bolts was analyzed.Based on the finite element method,the residual preload of arc thread anchor and general thread anchor was calculated under different preload and lateral displacement load conditions.The results show that when the threaded coupling pair is loosened by the lateral displacement cyclic load nut,the residual preload force of the arc thread anchor can be divided into a rapid decline and a stationary phase,and the preloading force is extremely slow in the stationary phase.The variation trend of the residual preload force of the general thread anchor bolts changes linearly,there is no obvious step,and the residual preload force of the arc bolts is always low^er than that of the general thread anchors.Therefore,the comprehensive anti-loosening effect of the arc thread anchor is better than that of the general thread anchor.

关 键 词：圆弧螺纹 普通螺纹 防松 

分 类 号：TH131.3[机械工程—机械制造及自动化]