光束定向器方位轴磁流变液密封的设计与优化  

Design and Optimization of Magnetorheological Fluid Seal for Azimuth Axis of Beam Director

作　　者：王其雨 申玉瑞 金康 刘新华[1] WANG Qiyu;SHEN Yurui;JIN Kang;LIU Xinhua(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;School of Mechatronic Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150001,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《润滑与密封》2023年第4期127-135,共9页Lubrication Engineering

基　　金：国家自然科学基金项目(51975568);江苏省自然科学基金项目(BK20191341)。

摘　　要：为满足光束定向器方位轴内气体的密封要求,设计一种外筒分离式的磁流变液密封结构,主要由磁流变液、极靴、永磁体、外筒和内筒组成。利用Maxwell建立该密封结构的简化模型,仿真分析密封结构的磁感应强度及其分布情况。分析磁流变液密封结构中极齿形状对耐压值的影响,得出在密封间隙为0.12~0.22 mm时,单侧倒角齿形的磁流变液密封性能更好。采用正交试验法对密封间隙、齿宽、齿高、槽宽和单侧倒角等齿形参数进行优化,正交试验结果表明:密封间隙对磁流变液密封耐压值影响最大,其次是极齿宽度,槽宽、倒角角度和齿高对耐压值的影响较小。最终得到一组最优参数,优化后的磁流变液密封的密封性能提高了199.4%。In order to meet the sealing requirements of the gas in the azimuth axis of the beam director,an outer cylinder separated magnetorheological fluid(MRF)sealing structure was designed,which is mainly composed of MRF,pole shoe,permanent magnet,outer cylinder and inner cylinder.The simplified model of the sealing structure was established by Maxwell,and the magnetic induction intensity and the distribution of the sealing structure were simulated.The influence of pole tooth shape on pressure resistance in MRF sealing structure was analyzed.It is concluded that when the seal gap is from 0.12 mm to 0.22 mm,the sealing performance of MRF with unilateral chamfer tooth shape is better.The orthogonal test method was used to optimize the tooth shape parameters such as sealing gap,tooth width,tooth height,groove width and unilateral chamfer.The orthogonal test results show that the sealing gap has the greatest influence on the pressure resistance value of magnetorheological fluid seal,followed by the pole tooth width,the groove width,unilateral chamfer and tooth height have a small impact on the pressure resistance value.Finally,a set of optimal parameters was obtained,and the sealing performance of the optimized magnetorheological fluid seal was improved by 199.4%.

关 键 词：光束定向器 磁流变液 密封结构 磁场仿真 正交试验 

分 类 号：TH136[机械工程—机械制造及自动化]