（毕业设计论文）《AV112型鼓风机焊接机壳的焊缝设计及其零件分解》.doc

AV112型鼓风机焊接机壳的焊缝设计及零件分解 摘要 目前的大部分鼓风机机壳多采用铸造技术进行设计，机壳刚性强、振动小、噪声低、运行平稳、便于安装。但对于一些需求量较少的（可能就一两台），机壳若仍采用铸造成形，则会使生产周期过长，且成本加大。因此，鼓风机生产企业考虑用焊接成形方法制作鼓风机机壳，这样可以很大的节约成本，方便进行表面美化和设计，但是采用焊接所带来的强度、刚度、稳定性等方面的问题，需要分析计算和结构优化，以满足其使用要求。 在本次设计中，首先结合大型轴流压缩机焊接机壳的焊接变形问题，对典型接头焊接变形与残余应力分布进行了分析，得到了典型接头残余应力分布及焊接变形规律。在此基础上，选取大型轴流压缩机焊接机壳上具有代表性的关键焊缝，进行分析计算，得到了关键焊缝焊接变形结果，并提出了控制焊接变形的措施。 关键词：鼓风机；焊接机壳；受力分析；焊缝结构 The Weld Joint Design of AV112 Air Blower Equipment and the Joint-parts Decomposition ABSTRACT Now, a part of Air blowers hull, design of coin technique, the hull with hard steel ality, small concussion,low noise, steady to run, convenient for fix,but for some little amount demands(perhaps one or two), the hull still adopt the coin technique founding to take shape, the product cycle will long and the cost will increase.So,the factory of wind-pump use weld technique to make wind-pumps hull,it can saving a lot of cost,easier to embellish and design surface, but the problem of intensity , steel ality , steady in welding,calculate anasisy and structure advantage, to appessement necessary. In this design, first the welding deformation and residual stress distribution oftypical weld joint combined withormation problem of the large axial—flow compressor welding caSing were investigated，thenregulation of residual stress distribution and welding deformation of typical weld joint were . Based on it，the key weld seams in the large axial—flow compressor welding caSing were chosen and analyzed，and the result of welding deformation of key weld seams were obtained, at the same time，the measurements controlling welding deformation were recommended． Keywords: Air blower; Welds the cabinet; Stress analysis; Welded joint structure 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc31648 第1章 绪论 PAGEREF _Toc31648 1 HYPERLINK \l _Toc29548 1.1 课题来源及研究意义 PAGEREF _Toc29548 1 HYPERLINK \l _Toc32131 1.2 结构特性研究中数值模拟技术应用现状 PAGEREF _Toc32131 4 HYPERLINK \l _Toc18043