流体机械2016，Vol.44Issue(5)：26-30,5.DOI:10.3969/j.issn.1005-0329.2016.05.006
低温 BOG 压缩机活塞杆运动件预紧力的研究
Preload Analysis of Piston Rod Bolted Joints on BOG Compressor in Low Temperature
燕翌 1杨其文 2李云1
作者信息
- 1. 西安交通大学，陕西西安 710049
- 2. 中石化洛阳工程有限公司，河南洛阳 471003
- 折叠
摘要
Abstract
BOG(Boil Off Gas)compressor compresses the gas boiled off from the LNG storage tank.Its main characteristic is that it works in ultra low temperature lower than -100℃.In such a low temperature,the preload condition of bolted joints in BOG compressor will change a lot comparing with the pre-tightening condition in ambient temperature.In this paper,the bolted joint on piston rod is treated as research object.The validity of theoretical evaluation of preload change is certificated using Finite Element Method.The result shows that the error of theoretical estimation is relatively low even if the dimension of bolted joints is not com-pletely typical.For the bolted joints with the combination of 304 &SIC815 and pre-tightened to 60% yield point,its preload will lose more than 30% in -125℃.Additionally,the effect of the reciprocating piston force and the stress concentration on the bolted joint is discussed and taking these factors into consideration,a set of preload selection recommendation formula is presented in this paper.It will help decided the preload of a wide range of bolted joints in ambient temperature.关键词
BOG 压缩机/预紧力/预测公式Key words
BOG compressor/bolt preload/evaluation formula分类
机械工程引用本文复制引用
燕翌,杨其文,李云..低温 BOG 压缩机活塞杆运动件预紧力的研究[J].流体机械,2016,44(5):26-30,5.
