摘要
磁性液体密封具有"零"泄漏、寿命长等优点,在气体密封等领域得到了成熟的应用,然而,在液体环境中的密封性能较差。本文综述了磁性液体密封液体的发展现状,对传统磁性液体密封结构进行了改进,提出气体隔离式磁性液体密封,将原磁性液体密封液体介质的问题转化为其密封气体介质的问题,从根本上解决了磁性液体与被密封液体界面的不稳定性问题。
The latest progress in applications of magnetic fluid seal in sealing liquids, including blood, sea-waterand petroleum, was tentatively reviewed. The discussionswith specific examples focused on：i） theoretical studies in understanding the complicated magnetic fluid/liquid interface and possible failure mechanisms in the liquids sealing;ii） improved magnetic fluid seal structures available;and iii） the existing problems, such as the poor seal- ing capacity,low resistance to pressure,low stability and short service life in sealing liquids. Herein, we proposed a novel sealing configuration：a compressed gas-layer, inserted between the magnetic fluid and the sealed liquids, is capable of effectively avoiding their direct contact and turning the sealed liquid medium into sealed gas medium. Simulated with software Fluent, the newly-proposed magnetic fluid seal structure significantly improved the stability at the interface of magnetic fluid and liquids.
作者
王虎军
Wang Hujun(China University of Labor Relations ,Beo＇ing 100048, Chin)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2018年第3期193-198,共6页
Chinese Journal of Vacuum Science and Technology
基金
中央高校基本业务费专项资金项目(18ZYJS011)
关键词
磁性液体
密封液体
气体隔离
密封性能
Magnetic liquid, Sealing liquids, Gas Isolation, Seal performance
