磁悬浮空压机叶轮结构强度分析及优化设计

Structure Strength Analysis and Optimization Design of Magnetic Levitation Air Compressor Impeller

关键词:  磁悬浮空压机  叶轮  结构优化  强度仿真

Key Words:magnetic levitation air compressor  impeller  structural optimization  intensity simulation

摘要:本研究运用有限元分析方法对某磁悬浮空压机半开式叶轮结构强度进行分析，探究了叶轮结构对叶轮应力及变形的影响趋势。根据叶轮应力及变形的变化趋势，调整叶轮轮盘厚度、轮盘与电机配合处的距离、叶轮密封齿角度、叶轮后背根部倒圆半径、脐子半径和内孔半径，优化后叶轮的最大等效应力降低34.5%，最大径向应力降低38.7%，最大周向应力降低8.2%，最大径向变形降低16.3%，最大轴向变形降低6.1%，最小轴向变形降低10.5%，保证了磁悬浮空压机叶轮在最高转速下的静强度，满足设计准则的要求，变形符合安装要求，对叶轮结构设计具有良好的借鉴意义。

Abstract:The structural strength of the impeller was analyzed by the finite element analysis method and the influence trend of the impeller structure on the stress and deformation was also discussed based on the semi-open impeller of a magnetic levitation air compressor. According to the influence trend of the impeller structure on the stress and deformation， the impeller wheel thickness， the wheel relative position， the impeller sealing tooth angle， the radius of the back root of the impeller， the radius of the hub and the radius of impeller bore were adjusted. The maximum equivalent stress of the impeller after optimization decreased by 34.5%； the maximum radial stress decreased by 38.7%； maximum circumferential stress decreased by 8.2%； the maximum radial deformation decreased by 16.3%； the maximum axial deformation decreased by 6.1%； the minimum axial deformation decreased by 10.5%. The static strength of the impeller at the highest speed met the requirements of the design criteria， the deformation met the installation requirements， and the structural design of the impeller had good reference significance.