《毕业论文：蛇管式换热器毕业设计》.doc

毕业设计说明书 PAGE  PAGE VIII 目 录 摘 要····································································Ⅲ ABSTRACT·····························································Ⅳ 1 绪 论 1.1本设计的研究背景和意义················································1 1.1.1本设计的研究背景···················································1 1.1.2本设计的研究意义···················································1 1.2换热器在生产中的作用和地位············································1 1.3换热器的分类··························································2 1.4换热器的发展及国内外研究现状··········································5 1.5换热器的发展动向·················································6 1.6三维造型技术的应用··················································6 1.7本设计的研究内容及方法·················································8 1.7.1本设计的研究内容·····················································8 1.7.2本设计的研究方法·····················································9 2 蛇管式换热器整体结构设计 2.1管径及介质进入蛇管内外的选择···········································9 2.2冷热流体物性数据的确定·················································9 2.3传热面积的计算·························································9 2.4蛇管长度及组数的确定···················································10 2.5管间距h和内、外圈间距t的确定···········································11 2.6筒体直径及材料、蛇管圈数及高度的确定····································11 2.7封头尺寸及材料的确定···················································12 2.8吊耳尺寸的确定·························································13 2.9支座尺寸的确定·························································13 2.10筒体法兰尺寸的确定····················································14 3 换热器零部件的强度校核 3.1筒体壁厚计算及校核·····················································15 3.1.1筒体壁厚计算························································15 3.1.2 筒体壁厚校核························································15 3.2 封头壁厚计算及校核····················································16 3.2.1封头壁厚计算························································16 3.2.2封头壁厚校核···············································