摘要
研究了一种由热解石墨转子、永磁体结构以及底板构成的抗磁悬浮结构,通过对石墨转子叶片施加氮气流使其运动。利用有限元软件COMSOL Multiphysics建立仿真模型,并且将仿真结果与实验结果相对比。研究表明,未受氮气流作用时,石墨转子仿真悬浮高度为130μm,实验测得悬浮高度为132μm,误差为1.5%;实验测得氮气流速小于21.45 sccm时,石墨转子在永磁体上方轻微摆动,而未转动,氮气流速达到21.45 sccm时,石墨转子转速稳定在120 r/min^130 r/min之间与仿真结果接近。通过对比仿真结果与试验数据得出石墨转子加工质量,实验环境对石墨转子的运动性能有一定影响,该抗磁悬浮结构有望用于微型电机和非接触式传感器中。
A kind of diamagnetic levitation structure composed of highly oriented pyrolytic graphite,permanent magnets and bottom plate was studied,and the graphite rotor was driven by applying nitrogen flow to the blades.A simulation model was established with the finite element analysis software COMSOL Multiphysics,and the calculation results were compared with the experimental results.The levitation height of the rotor was simulated to be 130μm,the experimental result was 132μm without applying nitrogen flow.The simulation error was wihin 1.5%.When experimental nitrogen flow rate was less than 21.45 sccm,the rotor swung slightly over the permanent magnets without rotating 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.
作者
丁建桥
张坤
张振宇
苏宇锋
段智勇
DING Jianqtao;ZHANG Kun;ZHANG Zhenyu;SU Yufeng;DUAN Zhiyong(School of Mechanical Engineering,Zhengzhou University, Zhengzhou 450001, China;School of Physical Engineering,Zhengzhou University,Zhengzhou 450001, China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2018年第2期180-184,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(51475436)
河南省重点科技攻关项目(152102210042)
2018年度河南省高校科技创新团队项目(18IRTSTHN016)
关键词
抗磁悬浮
石墨转子
有限元分析
流固耦合
永磁体
diamagnetic levitation
graphite rotor
finite element analysis
fluid solid coupling
permanent magnet
