传感技术学报2018，Vol.31Issue(2)：180-184,5.DOI:10.3969/j.issn.1004-1699.2018.02.004
抗磁悬浮石墨转子理论及仿真分析
Theoretical and Simulation Analysis of Micro-Machined Graphite Rotor Levitated Above Permanent Structure
摘要
Abstract
A kind of diamagnetic levitation structure composed of highly oriented pyrolytic graphite,permanent mag-nets and bottom plate was studied,and the graphite rotor was driven by applying nitrogen flow to the blades.A simu-lation model was established with the finite element analysis software COMSOL Multiphysics,and the calculation re-sults were compared with the experimental results.The levitation height of the rotor was simulated to be 130 μm,the experimental result was 132 μm without applying nitrogen flow. The simulation error was wihin 1.5%. When experi-mental nitrogen flow rate was less than 21.45 sccm,the rotor swung slightly over the permanent magnets without ro-tating and when nitrogen flow rate reached 21.45 sccm,the rotor revolved with a stable speed between 120 r/min~130 r/min,the results were close to the simulation results. By comparing the simulation and experimental results,it is found that the machining quality of graphite rotor and experimental environment have influences on the motion performance of graphite rotor. The diamagnetic structures possess potentials in the applications of micromotors and contactless microsensors.关键词
抗磁悬浮/石墨转子/有限元分析/流固耦合/永磁体Key words
diamagnetic levitation/graphite rotor/finite element analysis/fluid solid coupling/permanent magnet分类
机械制造引用本文复制引用
丁建桥,张坤,张振宇,苏宇锋,段智勇..抗磁悬浮石墨转子理论及仿真分析[J].传感技术学报,2018,31(2):180-184,5.基金项目
国家自然科学基金项目(51475436) （51475436）
河南省重点科技攻关项目(152102210042) （152102210042）
2018年度河南省高校科技创新团队项目(18IRTSTHN016) （18IRTSTHN016）
