基于无齿极靴结构的磁性液体密封耐压仿真分析  

Simulation analysis of pressure resistance of magnetic liquid seal based on toothless pole shoe structure

作　　者：刘嘉伟 李德才[1,2] LIU Jia-wei;LI De-cai(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：《磁性材料及器件》2022年第5期45-51,共7页Journal of Magnetic Materials and Devices

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

摘　　要：作为磁性液体最成熟的应用之一,磁性液体密封的极齿结构易出现因安装和转轴跳动而剐蹭损坏的问题,且常用的极齿结构因尺寸微小,还存在加工工艺差和大间隙下密封性能差的问题,从而导致密封失效。为了解决上述问题,首次提出使用环形导磁片和不导磁片交替放置的无齿磁性液体密封结构,新型密封的结构优势明显,经ANSYS仿真计算,并与经典磁性液体密封进行了对比,发现新结构具有一定的耐压能力,可以替代磁性液体密封的经典结构;随后运用Design-Expert统计工具对无齿磁性液体密封进行优化设计,为无齿磁性液体密封的设计提供参考方案。该方法设计出的无齿磁性液体密封在工程中已有成功应用,密封良好,可靠性高。As one of the most mature applications of magnetic fluid,the pole tooth structure of magnetic fluid seal is prone to scratch during installation and shaft vibration.Meanwhile,due to small size the commonly used polar tooth structure has problems of poor processing process and poor sealing performance under large gaps,which will lead to seal failure.To solve the problems above,this paper proposes a toothless magnetic fluid sealing structure with annular and conductive magnetic plate for the first time.New sealing has obvious structural advantages.According to ANSYS simulation calculation and comparison with the classical magnetic fluid seal,the new structure has certain pressure resistance to replace the classical structure of magnetic fluid seal.Then Design-Expert statistical tool is used to optimize the seal to provide a reference scheme for the design of toothless magnetic fluid seal.The toothless magnetic fluid seal has been successfully used in engineering,with good sealing and high reliability.

关 键 词：磁性液体 无极齿磁性液体密封 有限元仿真 优化设计 

分 类 号：TM271[一般工业技术—材料科学与工程] TB42[电气工程—电工理论与新技术]