“几”字型双支撑高速逆流色谱转子系统的结构优化与性能分析

Structure optimization and performance analysis of aп-type double-supported high-speed countercurrent chromatography rotor system

转子系统是逆流色谱仪的核心部件之一,对高速逆流色谱仪高效分离功能的实现起着关键作用.针对现有技术下逆流色谱仪悬臂式安装存在重量大、解绕管易断裂及拆卸困难等问题,本文提出了一种“几”字型双支撑逆流色谱仪转子系统机械结构.以此为研究对象,本文通过Ansys Workbench仿真平台进行了静力学分析和模态分析.然后,基于SIMP变密度法,本文以提高结构刚度为优化目标、减小质量为约束,对“几”字型双支撑的行星架进行了拓扑优化.最后,本文对二次建模后的转子系统进行动静力学性能分析与疲劳分析,并试制了样机.仿真结果表明,经行星架优化后,转子系统各项性能均满足高速逆流色谱仪的设计要求,但质量与未优化前相比降低了11.9%.本研究可望为高速逆流色谱仪的高效分离性能提供保障.

Rotor system is one of the core components of countercurrent chromatograph and plays a key role in the realization of high efficiency separation function of high-speed countercurrent chromatograph.In this paper,aiming at the problems such as heavy weight,easy fracture of unwinding tube and difficult disassembly in cantilever installation of countercurrent chromatograph under existing technology,we propose aп-shaped mechanical structure for the double-supported rotor system of countercurrent chromatograph.Static analysis and modal analysis are conducted by using the Ansys Workbench simulation platform.Then,based on the SIMP variable density method,topological optimization of theп-shaped double supported planetary frame is carried out with the improvement of structural stiffness as target and the reduction of mass as constraint.Finally,dynamic and static mechanical performance analysis and fatigue analysis are conducted for the rotor system by secondary modeling,a prototype is trial-produced.Simulation results show that the rotor system after the optimization of planetary frame meets the design requirements of high-speed countercurrent chromatograph with 11.9%lower mass.It is expected that the obtained results can help for the efficient separation performance of high-speed countercurrent chromatograph.