U形管换热器法兰接头密封性能分析

Analysis on Sealing Performance of Flange Joint of U-Shaped Heat Exchanger

将换热器法兰接头作为一个系统进行研究,建立了U形管换热器法兰接头三维有限元模型。根据ASME中的经验公式采用等厚无孔圆平板代替开孔管板,得出了管、壳程压差作用下管板的应力分布情况。考虑了垫片材料的非线性和时滞效应,着重分析了操作工况下不同管、壳程压差对垫片应力分布及法兰接头紧密性的影响。

In this paper, the flange joint was studied as a system; the three-dimensional finite element model of U-shaped heat exchanger flange joint was established. According to ASME empirical formula, an equivalent round plate without opening was used to replace the tube plate with opening; stress distribution of the tube sheet under differential pressure was obtained. Considering the nonlinear characteristics and time lag effect of the gasket material, effect of the pressure difference on stress distribution of the gasket and sealing performance of the flange joint under operating conditions was analyzed.