大型离心压缩机焊接叶轮出口流道变形数值分析  

Numerical analysis of welded impeller’s outlet flow passage deformation in large centrifugal compressor

作　　者：韩龙 徐甄真 牛靖[1] 张建勋[1] Han Long;Xu Zhenzhen;Niu Jing;Zhang Jianxun(Xi’an Jiaotong University,State Key Laboratory for Mechanical Behavior of Materials,Xi’an 710049,China)

机构地区：[1]西安交通大学,金属材料强度国家重点试验室,西安710049

出　　处：《焊接》2020年第9期1-7,61,共8页Welding & Joining

基　　金：国家自然科学基金面上项目(51875442)。

摘　　要：文中采用有限元法分析了大型离心压缩机叶轮焊接引起的出口流道变形规律和影响因素。研究结果表明,叶轮焊接及热处理后出口流道的变形主要是由盖盘变形引起的,流道出口高度的最终变形在2.3 mm左右。焊接后流道出口高度变形过大,于是设计了加装限位块以优化出口流道变形的方案。通过对限位块的不同位置分布进行数值模拟分析,结果表明限位块增设在叶片钝角侧后出口流道高度的焊接变形量降至原来的50%左右,叶轮总体变形振幅下降。In this paper,the finite element method was used to analyze the deformation law and influence factors of the outlet flow channel caused by welding the impeller of a large centrifugal compressor.The research results showed that the deformation of the outlet runner after welding and heat treatment of impeller was mainly caused by the deformation of the cover disc,and the final deformation of the outlet height of the runner was about 2.3 mm.After welding,the outlet height of the runner was deformed too much,so a limit block was designed to optimize the outlet runner deformation.Through the numerical simulation analysis of different positions of the limit block,the results showed that the welding deformation of the outlet runner height was reduced to about 50%after the limit block was added on the obtuse angle side of the blade,and the overall deformation amplitude of the impeller decreased.

关 键 词：叶轮 焊接变形 有限元法 离心压缩机 限位块 

分 类 号：TG404[金属学及工艺—焊接]