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Friction 2023, 11(10): 1771-1793 https://doi.org/10.1007/s40544-022-0676-8
Review Article | Open Access | Issue | Published: 02 March 2023

Theory analyses and applications of magnetic fluids in sealing

Show Author's Information 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.

Keywords:
magnetic fluid, sealing mechanism, static sealing, rotary sealing, reciprocating sealing
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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Abstract Full text About this article

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.


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About this article

Theory analyses and applications of magnetic fluids in sealing

Show Author's information 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.

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 fluid, sealing mechanism, static sealing, rotary sealing, reciprocating sealing

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Publication history

Received: 27 January 2022
Revised: 05 June 2022
Accepted: 19 July 2022
Published: 02 March 2023
Issue date: October 2023

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© The author(s) 2022.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51735006, 51927810, and U1837206) and Beijing Municipal Natural Science Foundation (Grant No. 3182013).

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