任意端面螺栓的转矩系数理论计算  

THEORETICAL CALCULATION OF TORQUE COEFFICIENT OF BOLT WITH ARBITRARY END FACE

作　　者：王成林 肖域坤 王朋 杜正春[2] WANG ChengLin;XIAO YuKun;WANG Peng;DU ZhengChun(China Nuclear Industry Maintenance Co.,Ltd.,Shanghai 200235,China;School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]中核检修有限公司,上海200235 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《机械强度》2024年第1期136-142,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51975372)资助。

摘　　要：螺栓连接是工程建设中常用的连接方式,工业现场常采用紧固力矩值控制螺栓预紧力的方式以保证其可靠性。转矩系数是螺栓紧固力矩与预紧力之间的比例系数,对确定合适的紧固力矩范围至关重要。目前关于转矩系数的研究主要集中在圆环端面螺栓,对其他端面螺栓的研究较少。根据螺栓紧固受力分析,构建了螺栓预紧的力学模型,以极坐标描述螺栓端面内外轮廓的方式,推导出了任意端面螺栓转矩系数的精确计算公式。通过搭建简易转矩系数测量系统,对圆环端面、六角端面、T型端面螺栓进行实验验证。实验结果与理论计算一致,证明了转矩系数理论计算公式的准确性。Bolting is a common connection method in engineering and construction,and the tightening torque is often used to control the preload of bolts on industrial sites to ensure the reliability.The torque coefficient is defined as the proportional factor between the tightening torque and the preload force of the bolt,which is essential to estimate the appropriate tightening torque range.At present,the research on torque coefficient is mainly focused on circular face bolts,and there is less research on other face bolts.Based on the force analysis of the bolt tightening process,a mechanical model of bolt preload is proposed,and an accurate calculation formula of the torque coefficient of arbitrary end face bolt is derived by using description of the internal and external contours of the bolt end face in polar coordinates.A simple torque coefficient measurement system is built to test and verify the torque coefficients of circular end face,hexagonal end face and T⁃shaped end face bolts.The testing results are consistent with the theoretical calculation,which proves the accuracy of the theoretical calculation formula of torque coefficient.

关 键 词：任意端面螺栓 转矩系数 极坐标 理论计算 转矩系数测量 

分 类 号：TH131.3[机械工程—机械制造及自动化]