基于流场的变截面动涡盘热应力变形分析

摘要

建立了变截面动涡旋盘的三维几何模型。选择结构单元SOLID185，生成其有限元模型。对涡旋压缩机流场分析得到的模拟结果，进行插值拟合处理，得到了涡旋盘表面与压缩工质的对流换热系数及温度分布函数。由此对变截面动涡盘分别在线性温度场和基于流场分析的温度场进行热分析，得到了两种热边界载荷情况下涡旋盘的温度场分布，以及热变形和Mises应力结果。比较动涡盘的两种分析结果，说明涡盘热载荷的线性简化是合理的，基于流场的有限元分析更加符合涡旋压缩机的实际工况。%The non-uniform orbiting scrol dimensional geometry is generated. The finite element model of its variable cross-section is established with the structural unit SOLlD185. Then, the thermal load that is the surface temperature of the compressed working fluid and convective heat transfer coefficient is fitted for the load function. And the thermal analysis is done for the non-uniform orbiting scrol with the load. Compared with the analysis results of the thermal deformation and Mises stress of the scrol , it indicates that the simplified method of linear thermal load is reasonable, which can be used to analyze the deformation and stress of the scrol . And the finite element analysis based on the flow field is more suited for the actual working conditions of the scrol compressor.