Motion State Analysis and Seal Ability Study on the Magnetic Fluid Seal of Reciprocating Shaft

Li, Decai; Hong, Jianping; Yang, Qingxin; Wang, Xiu-ting

doi:10.1016/s1000-9361(11)60140-4

Cited by 3 publications

(2 citation statements)

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“…Its operation was affected by the seal deformation and the carry-over, the former being the main factor. Based on the anti-pressure formula of the reciprocating MFS from general Navier-Stokes equation, Li et al [138] studied the motion mechanism of magnetic fluids in the reciprocating seal gap. They estimated the magnetic field distribution in sealed structure and got the maximum static anti-pressure Friction | https://mc03.manuscriptcentral.com/friction to verify the correctness of the anti-pressure formula.…”

Section: Magnetic Fluid Reciprocating Sealingmentioning

confidence: 99%

“…Finally, the influence of stroke and speed on the sealing anti-pressure was investigated. After this work, Li et al [139] concentrated on the regular pattern of the magnetic fluid flow, the loss quantity caused by the shaft with reciprocating motion, the sealing failure reason, and the new structure design. Two years later, Li et al [140] set up a new experimental facility, which was composed of a step-by-step motor, pin roller screw, microscope, camera, permanent magnet, reciprocating motion shaft, pole pieces, and the magnetic fluid in the seal gap.…”

Section: Magnetic Fluid Reciprocating Sealingmentioning

confidence: 99%

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Theory analyses and applications of magnetic fluids in sealing

et al. 2023

Friction

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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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Section: Magnetic Fluid Reciprocating Sealingmentioning

confidence: 99%

Section: Magnetic Fluid Reciprocating Sealingmentioning

confidence: 99%

Theory analyses and applications of magnetic fluids in sealing

et al. 2023

Friction

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show abstract

Analyses toward factors influencing sealing clearance of a metal rubber seal and derivation of a calculation formula

Yan

Zhao

Liu

et al. 2016

Chinese Journal of Aeronautics

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Research on dynamic coupling characteristics of magnetic fluid and gas medium interface in sealing devices

2023

Physics of Fluids

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The widths and shapes of sealing interfaces are key indicators for characterizing the sealing stability of dynamic and static magnetic fluid seals. In this study, the interface of a magnetic fluid seal was numerically simulated and changes in the interfacial shape and width were tested and verified using a magnetic fluid seal device. The results showed that the pressure resistance decreased with an increase in seal clearance, and the magnetic fluid seal interface generated a small leakage channel. Following the complete formation of the leakage channel, the static seal gradually failed. During failure, the interface width of the magnetic fluid became narrow. At a certain pressure, the maximum pressure resistance decreased as a function of the rotational speed. Compared with a static seal, more small leakage channels and bubbles were generated. In constant conditions, such as fixed sealing clearance speed during dynamic and static sealing, the change in the width of the magnetic fluid interface of the dynamic seal was 5–7 times that of the static seal.

show abstract

Motion State Analysis and Seal Ability Study on the Magnetic Fluid Seal of Reciprocating Shaft

Cited by 3 publications

References 1 publication

Theory analyses and applications of magnetic fluids in sealing

Theory analyses and applications of magnetic fluids in sealing

Analyses toward factors influencing sealing clearance of a metal rubber seal and derivation of a calculation formula

Research on dynamic coupling characteristics of magnetic fluid and gas medium interface in sealing devices

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