换热管与管板先焊后胀接头拉脱性能研究  

Research on Pull-off Performance of Joint Welded First and Then Expanded between Heat Exchange Tube&Tube Sheet

作　　者：倪吉旭 雷沙沙 李志霞 苏厚德 Ni Jixu;Lei Shasha;Li Zhixia

机构地区：[1]机械工业兰州石油化工设备检测所有限公司,兰州730050 [2]甘肃蓝科石化高新装备股份有限公司,兰州730050

出　　处：《机械制造》2025年第3期53-59,共7页Machinery

基　　金：甘肃省重点研发计划-工业类项目资助(资助号:23YFGA0024)。

摘　　要：应用ABAQUS软件,对管壳式换热器换热管与管板先焊后胀接头进行不同胀接压力和不同温度下的拉脱力数值模拟,得到不同胀接压力下换热管与管板先焊后胀接头残余接触应力和拉脱力随温度变化的情况,并进行相应拉脱试验进行验证。研究结果表明,对于先焊后胀接头,在相同胀接压力下,随着温度的升高,残余接触应力增大,拉脱力先逐渐减小,在400℃时略微增大,然后再次减小。先焊后胀接头在相同温度下,随着胀接压力的增大,残余接触应力不断增大,拉脱力基本没有变化。The numerical simulation was conducted on the pull-out forces of the joint welded first and then expanded between the heat exchange tube and the tube sheet of a shell and tube heat exchanger under different expansion pressures and temperatures by using ABAQUS software.The variation of residual contact stress and pull-out force of the joint welded first and then expanded between the heat exchange tube and the tube sheet under different expansion pressures was obtained,and the corresponding pull-out test was conducted to verify the result.The research result indicates that for the joint welded first and then expanded,under the same expansion pressure,as the temperature increases,the residual contact stress increases,and the pull-out force gradually decreases first,slightly increases at 400℃,and then decreases again.At the same temperature,with the increase of expansion pressure,the residual contact stress of the joint welded first and then expanded increases continuously,and the pull-out force remains basically unchanged.

关 键 词：换热管 管板 焊接 胀接 接头 拉脱性能 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]