钛管换热器液压胀接接头性能分析

Study on the Performance of Hydraulic Expanding-jointof Titanium Tube Heat Exchanger

摘要:

基于有限元分析软件，对换热器液压胀接接头性能进行了分析，研究了不同胀接压力、材料组合、初始间隙对液压胀接接头密封性能、连接性能的影响。结果表明，随着胀接压力的增大，胀接接头的密封性能和连接性能加强；相同胀接压力下，换热管为TA2、管板为TA2时胀接接头的密封、连接性能优于材料组合为TA2-Q345R时的接头性能；初始间隙较小时，随着初始间隙的增大，胀接接头的密封性能和连接性能减弱；初始间隙较大时，其对胀接接头的密封性能和连接性能影响较小。

Abstract:

Based on the finite element software,the performance of the hydraulic expanded joint of heat exchanger was analyzed.The effect of expansion pressure,material and initial clearance on the capacity and tightness of expanded joints was investigated.Results show that the capacity and tightness of expanded joints will be apparently enhanced with increasing pressures.Under the same pressure,the capacity and tightness of the joint of TA2 tube and TA2 tubesheet is better than the performance of the TA2-Q345R material combination.As the initial clearance is smaller,the residual contact pressure and pull-out force will decrease with the increasing initial clearance.As the initial clearance is larger,the residual contact pressure and pull-out force will retain a constant value regardless of the initial clearance.