磁性液体密封磁源结构的选择及耐压分析  

Magnet selection and anti-pressure analysis of magnetic fluid seal

作　　者：刘嘉伟 李德才[1,2] 张志力[1] LIU Jiawei;LI Decai;ZHANG Zhili(School of Mechanical and Electronic Control Engineering,Beijing Jiaotong University,Beijing 100044,China;State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044 [2]清华大学摩擦学国家重点实验室,北京100084

出　　处：《北京交通大学学报》2021年第6期71-76,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金(51735006,U1837206,51927810);北京市自然科学基金(3182013)。

摘　　要：磁性液体密封是磁性液体最成熟的应用之一,环型永久磁铁是磁性液体密封最常用的磁源结构,但在大直径磁性液体密封中环型永久磁铁会因直径过大而导致充磁不均匀和耐压值降低的问题,需要更改磁源结构.针对大直径环形磁铁充磁不匀的问题,对多种磁源结构进行研究,以一个在工程中成功应用的磁性液体密封为算例,使用Maxwell软件对不同磁源结构进行了有限元仿真和定量分析.结果表明:由圆柱磁铁或瓦型磁铁拼接磁源结构可以替代传统环形磁体作为磁性液体密封的磁源,使之具有一定的密封能力.Magnetic fluid seal is one of the most mature applications of magnetic fluid.Ring permanent magnet is the most commonly used magnetic source for magnetic fluid seal.However,in large-diameter magnetic fluid seal,ring permanent magnets often show problems like uneven magnetization and low pressure resistance.Therefore,the magnetic source structure needs to be altered.To solve the problem of large-diameter ring permanent magnets’uneven magnetization,various magnetic source structures are studied,and a magnetic liquid seal successfully applied in engineering is taken as an example.Then,Maxwell is used to conduct finite element simulation and quantitative analysis of different magnetic source structures.The results show that cylindrical magnet or tile magnet joint structure can replace conventional ring magnets as the magnetic source for magnetic fluid seal,which can contribute to the increase of sealing capability.

关 键 词：磁性液体 密封 有限元仿真 磁源结构 

分 类 号：TB42[一般工业技术]