涡壳结构参数的正交试验优化设计  

Optimal Designs of Structural Parameters by Orthogonal Experiment for Turbine Housing

作　　者：胡友安[1] 周建方[1] 李晓东[1] 陈图钧 

机构地区：[1]河海大学机电工程学院,江苏常州213022 [2]广东韩江流域管理局,广东汕头515041

出　　处：《内燃机学报》2006年第5期470-475,共6页Transactions of Csice

摘　　要：在涡轮增压器涡壳的新产品开发中,对涡壳进行有限元分析和实测试验发现,在涡壳的某些局部热应力较大并且产生热裂纹。根据有限元分析结果及实测中裂纹出现的位置,结合现有的涡壳结构和过去的设计经验,确定涡壳结构中6个结构因子的设计不合理为引起热裂纹产生的主要原因,进一步用正交试验优化设计方法对原模型中影响涡壳热裂纹产生的6个主要结构参数进行分析。分析结果表明,涡壳的流道分隔墙厚度为5 mm,有W／G凸台,流道壁厚取5 mm,T-T截面采用圆弧形,舌形挡板厚度是3．6 mm,V型圈边为平面过渡时的模型为优化的模型。此模型顺利通过实测试验和有限元分析。In the of turbine housing cracking positions, designing of turbine housing, FEM analysis and test results suggest that thermal stresses at some local areas are severely and cracking usually occurs at these area. According to FEM analysis results and designing experiences, six structural factors （divider, wall Thickness, tongue, T-T section, W/G boss and V-band） were considered as the key parameters that strongly influence to thermal cracking. Through optimal method analysis from the orthogonal experiments, the most optimal model for turbine housing was found with divider thickness of 5 mm, wall thickness of 5 mm, tongue thickness of 3.6 mm, round T-T section and recessed V-band. The model successfully passes the testing and FEM analysis.

关 键 词：涡壳 结构因子 正交试验 优化 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]