分瓣式密封装置磁性液体平面密封研究

doi:10.3901/JME.2018.05.149

机械工程学报 ›› 2018, Vol. 54 ›› Issue (5): 149-155.doi: 10.3901/JME.2018.05.149

分瓣式密封装置磁性液体平面密封研究

张惠涛^1,2, 李德才¹

1. 北京交通大学机械与电子控制工程学院北京 100044;
2. 石家庄学院计算机学院石家庄 050035

收稿日期:2016-08-16 修回日期:2017-03-14 出版日期:2018-03-05 发布日期:2018-03-05
通讯作者: 李德才(通信作者),男,1966年出生,教授,博士研究生导师。主要研究方向为机电液磁一体化的理论及应用。E-mail:dcli@bjtu.edu.cn
作者简介:张惠涛,男,1977年出生,博士研究生。主要研究方向为分瓣式磁性液体密封。E-mail:12116317@bjtu.edu.cn
基金资助:
教育部创新团队发展计划（IRT13046）、国家自然科学基金（51375039）、北京市自然科学基金（4142046）和北京交通大学人才基金（2014RC049）资助项目。

Studies of Magnetic Fluid Plane Sealing in Split Sealing Device

ZHANG Huitao^1,2, LI Decai¹

1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044;
2. School of Computer Science, Shijiazhuang University, Shijiazhuang 050035

Received:2016-08-16 Revised:2017-03-14 Online:2018-03-05 Published:2018-03-05

摘要/Abstract

摘要： 为解决现有密封装置在试验、装配、使用中需要更换极靴造成的成本增加、效率降低等问题，设计一种磁性液体旋转密封与磁性液体平面密封相结合的分瓣式磁性液体密封结构，并且基于基尔霍夫第一定律和磁路欧姆定律理论，推导了磁性液体平面密封耐压性能理论，采用有限元分析法，针对不同密封间隙以及不同极靴齿宽，对平面密封结构间隙内磁场强度进行了模拟计算。结果表明：该结构具有很好的密封能力，密封间隙和齿宽都是影响密封性能的关键参数，密封间隙越大，漏磁现象越严重，密封性能越低；齿宽为0.4 mm时密封性能最佳，超过1.6 mm后，密封性能很低。理论分析与模拟结果能为不同密封装置性能的评价以及界面失效临界压力的预估提供参考。

关键词: 分瓣式磁性液体密封, 结构参数, 密封性能, 平面密封, 有限元

Abstract: Changing pole shoe in the experiment, assembling and using of the existing split sealing device increased the cost and reduced the efficiency. To solve this problem, a split magnetic liquid sealing structure that combines magnetic liquid rotary sealing with magnetic fluid plane sealing is designed. Based on Kirchhoff's first law and the theory of Ohm's law of magnetic circuit, magnetic liquid plane sealing pressure performance theory is deduced. According to different seal gap and different pole shoe teeth width, a simulated calculation is conducted to get the magnetic field strength in the gap of plane sealing structure, using finite element method. The results show that this structure has good sealing ability. Seal gap and tooth width are the key parameters that affect the sealing performance, and the larger the sealing gap, the more serious magnetic leakage phenomenon, the lower the sealing performance. The sealing performance is the best when the tooth width is 0.4 mm, and is very low when the tooth width is over 1.6 mm. The theoretical analysis and simulation results provide reference for performance evaluation of different sealing devices and prediction of interfacial failure critical pressure.

Key words: finite element, plane sealing, sealing performance, split magnetic liquid sealing, structure parameter

中图分类号:

TH136

张惠涛, 李德才. 分瓣式密封装置磁性液体平面密封研究[J]. 机械工程学报, 2018, 54(5): 149-155.

ZHANG Huitao, LI Decai. Studies of Magnetic Fluid Plane Sealing in Split Sealing Device[J]. Journal of Mechanical Engineering, 2018, 54(5): 149-155.

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分瓣式密封装置磁性液体平面密封研究

Studies of Magnetic Fluid Plane Sealing in Split Sealing Device

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