重型机械Issue(1)：44-48,5.
短夹紧比液压拉伸螺栓装配回弹行为试验研究
Experiment on the rebound phenomenon of small slenderness ratio hydraulic tie bolt
王寅超 1苏浩朋 2李少林 2石多奇 2齐红宇 2陈庆森1
作者信息
- 1. 中国联合重型燃气轮机技术有限公司,北京 100015
- 2. 北京航空航天大学能源与动力工程学院,北京 100191
- 折叠
摘要
Abstract
To the phenomenon that the actual pre tightening force and initial pre tightening force of small slenderness ratio hydraulic bolts are different before and after assembly,a rebound test of small slenderness ratio bolt assembly was designed to study the effects of different initial pre tightening force sizes,pre tightening times,different small slenderness ratio,and different bolt materials on the rebound coefficient of small slenderness ratio bolts.The empirical value of the rebound coefficient of bolts was analyzed and compared it with the experimental results.The results shows that the small slenderness ratio bolts will experience significant rebound when pre tightened using a hydraulic tensioner;The rebound coefficient of bolted connections is inversely proportional to its slenderness ratio and is independent of the initial preload force within the elastic range;The more times of preloading,the smaller the rebound coefficient is,and the rebound coefficient tends to be stable after 4 times of preloading,which is 5%lower than 1 time of tightening.The rebound coefficient of bolt material GH4169 is 4%～8%larger than that of 2Cr12MoV.关键词
短夹紧比螺栓/液压拉伸螺栓/回弹变形/螺栓装配预紧/螺栓预紧力Key words
small slenderness ratio bolt/hydraulic tie bolt/rebound phenomenon/tightening bolt/bolt preload分类
机械工程引用本文复制引用
王寅超,苏浩朋,李少林,石多奇,齐红宇,陈庆森..短夹紧比液压拉伸螺栓装配回弹行为试验研究[J].重型机械,2025,(1):44-48,5.
