排灌机械工程学报Issue(6)：472-476,499,6.DOI:10.3969/j.issn.1674-8530.13.0067
基于流固耦合的离心泵蜗壳结构分析与优化
Analysis and optimization of structure in centrifugal pump based on fluid-structure interaction
摘要
Abstract
In order to optimize the matching of impeller with extra-thick blades and volute in a centri-fugal pump,the structure displacement,equivalent stress and modes of different volutes were simulated by one-way coupling Fuild-Structure Interaction method.The ratio between basic circle diameter of volute and impeller diameter (D3/D2 )is the main impact on the dynamic characteristics of volute,so it was chosen to design the simulation.When D3/D2 is small (case A),the un-uniform velocity distri-bution induced by jet-wake in blade outlet leads to the strong pressure pulsation and vibration of vo-lute.However,dynamic parameters are weakened and tend to be stable when the ratio D3/D2 gradually increases (case B,C).Under the design conditions,the maximum displacement in case A is 544μm, and the maximum equivalent stress is 15.7 MPa.In case B and C,the maximum displacement is re-duced to 2.6%,2.8% of case A,respectively,and the maximum equivalent stress is reduced to 14. 8%,22.9%,respectively.The numerical results of the three cases show that case A and B have simi-lar dynamic characteristics,while case B is more stable.Consequently,it is recommended that,D3/D2 should be plausible around 1.13,which is chosen in case B,in designing a volute of centrifugal pumps with extra thick blades,for a good dynamic characteristics.关键词
离心泵/蜗壳/单向流固耦合/等效应力/优化设计Key words
centrifugal pump/volute/fluid-struture interaction/equivalent stress/optimal design分类
机械制造引用本文复制引用
王海宇,张德胜,施卫东,张磊..基于流固耦合的离心泵蜗壳结构分析与优化[J].排灌机械工程学报,2014,(6):472-476,499,6.基金项目
国家科技支撑计划（2012BAB17B02-4，2011BAF14B01）；江苏省产学研联合创新资金是瞻性联合研究项目（BY2013065-03）；江苏省普通高校研究生科研创新计划项目 （）
