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Review Article | Open Access

Theory analyses and applications of magnetic fluids in sealing

Decai LI,†( ), Yanwen LI,†, Zixian LI, Yuming WANG
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

† Decai LI and Yanwen LI contributed equally to this work.

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Abstract

Magnetic fluids are the suspensions composed of magnetic nanoparticles, surfactants, and non-magnetic carrier liquids. Magnetic fluids are widely used in various fields, especially in sealing, because of their excellent features, including rapid magnetic response, flexible flow ability, tunable magneto-viscous effect, and reliable self-repairing capability. Here, we provide an in-depth, comprehensive insight into the theoretical analyses and diverse applications of magnetic fluids in sealing from three categories: static sealing, rotary sealing, and reciprocating sealing. We summarize the magnetic fluid sealing mechanisms and the development of magnetic fluid seals from 1960s to the present, particularly focusing on the recent progress of magnetic fluid seals. Although magnetic fluid sealing technology has been commercialized and industrialized, many difficulties still exist in its applications. At the end of the review, the present challenges and future prospects in the progress of magnetic fluid seals are also outlined.

Keywords

magnetic fluidsealing mechanismstatic sealingrotary sealingreciprocating sealing

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Friction
Volume 11 Issue 10,
October 2023
Pages 1771-1793
DOI: 10.1007/s40544-022-0676-8
Cite this article:
LI D, LI Y, LI Z, et al. Theory analyses and applications of magnetic fluids in sealing. Friction, 2023, 11(10): 1771-1793. https://doi.org/10.1007/s40544-022-0676-8

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Received: 27 January 2022
Revised: 05 June 2022
Accepted: 19 July 2022
Published: 02 March 2023
© The author(s) 2022.

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