【作者】 李鹏；

【导师】 黄志荣； 惠虎；

【作者基本信息】 华东理工大学 ， 化工过程机械， 2013， 硕士

【摘要】 换热器广泛应用于石油化工等行业,其中以管壳式换热器的应用最为广泛。随着压力容器大型化的趋势,很多换热器越做越大,管板越来越厚,如第三代先进压水堆的蒸汽发生器,其管板厚度已达700mm以上。对于厚管板胀接问题,国内外相关的研究还较少,另外关于管板胀接顺序的研究也不是很多,因此,本文主要针对这两个问题,展开研究。本文的主要研究成果如下：(1)通过材料试验测得换热管和管板材料的真实应力应变曲线,并在真实本构关系下证明Kohlpaintner等效外径公式依然适用；(2)针对厚管板胀接问题,研究了其残余接触压力的分布规律,并得出了管板厚度、初始间隙以及管间距对它的影响规律；(3)针对厚管板胀接中所产生的换热管缩短现象进行研究,得出了胀接压力、管板厚度和初始间隙对其的影响规律；(4)研究了胀接顺序对胀接的影响,并得出胀接接头之间的影响仅限于相邻的接头之间,距离更远的接头之间几乎没有影响。更多还原

【Abstract】 Heat exchanger, especially tube and shell heat exchanger, is widely used in petroleum and chemical industry. With the trend of large-scale pressure vessels, heat exchanger and tubesheet also become lager and thicker, for instance, the steam generator of the third generation advanced PWR has a thick tubesheet which reaches more than700mm. There are only a few researches on the thick tubesheet expanding and expanding order while there are a lot on hydraulic expanded joint. So it is necessary to make further efforts to research on the thick tubesheet expanding.The main work and results of this paper is as follows:(1) True stress VS strain curve of heat exchange tube and tube plate material was measured by material experiment, and Kohlpaintner equivalent diameter formula was proved still suitable for use.(2) The distribution law of the residual contact pressure of the thick tubesheet was studied, and the distribution law affected by tubesheet thickness, the initial gap and tube spacing was also studied.(3) The shortness affected by expanding pressure, thickness of tubesheet and initial gap was achieved while studying the tube shortness in expanding of thick tubesheet.(4) The order of expanding on expanding joints was researched, and the results showed that the expanding joint has influence only in the adjacent tube but not the further tubes.更多还原