Experimental research on effectiveness of the magnetic fluid seals for rotary shafts working in water

Szydło, Zbigniew; Matuszewski, Leszek

doi:10.2478/v10012-007-0040-y

Cited by 15 publications

(7 citation statements)

References 5 publications

(1 reference statement)

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“…They found that when the shaft diameter was large, the gravity should be considered, and the centrifugal force had an influence on the MFS capacity. Szydło and Matuszewski [119] carried out the tests for specially selected profiles of sealing lips and hydrophobic magnetic fluids at various linear velocities in a sealing unit. Although the tests were preliminary, their results showed that the studies about applications of MFSs working in liquid environment should continue.…”

Section: Magnetic Fluid Rotary Sealingmentioning

confidence: 99%

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 Rotary Sealingmentioning

confidence: 99%

Theory analyses and applications of magnetic fluids in sealing

et al. 2023

Friction

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“…Some years earlier in AGH Laboratory, the tests of MFseals operating in utility water environment were carried out [12,13,14] in order to assess their applicability in shipbuilding. Results of the tests conducted in the years 2009÷2010 on the test stand adjusted to operation of the seals in liquids [15] showed that it is possible to apply some commercial magnetic fluids to MF seals operating in direct contact with water in working conditions which occur in many devices met not only in ocean engineering.…”

Section: Gdansk University Of Technology Polandmentioning

confidence: 99%

Multi-stage magnetic-fluid seals for operating in water – life test procedure, test stand and research results

Matuszewski¹

2012

Polish Maritime Research

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The edge criteria for magnetic-fluid seals durability research are critical for the seal’stechnological usefulness. The magnetic fluid seal technology in water is much moredifficult technological problem in comparison to gas or vacuum environment. There isalways problem with immediate contact between magnetic fluid and the environmentaluninspected liquids. In the paper are presented ways of experiments definitions carried outwith multi-stage rotating magnetic fluid seal operating in permanent contact with utilitywater. The special test procedures have been elaborated and practically used, with theaim to define main characteristics of magnetic fluid seals. These characteristics were: critical pressure,critical motion velocity and working life of the seal. Some grades of commercial, silicon based magneticfluids of hydrophobic properties were tested in sealing system. The test stand and its features as well asresults of tests are presented in the form of tables, cross section draws and diagrams. In conclusion onecan see that multi-stage magnetic-fluid seals could be efficiently used in water for rotating shaft seals ina limited range of motion velocity and work lasting.

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“…As a new type of functional material, magnetic fluid has unique properties with both superparamagnetism and fluidity [1,2], which can be controlled by the action of an external magnetic field [3,4]. The magnetic fluid sealing technology is an excellent sealing technique and has been mature for gas sealing, but it is still in the early stage of sealing water [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of High Viscosity and Magnetoviscous Effect on the Washout Resistance of Magnetic Fluid

et al. 2023

Magnetochemistry

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Magnetic fluid seals have long been thought to be a successful sealing form while sealing liquids are always a challenge. The instability of the liquid–liquid interface under the washout has become the key technical problem that hinders the realization of sealing liquid. This work mainly presents an experimental study about the influence of high viscosity and magnetoviscous effects on washout resistance. Three engine oil-based magnetic fluids of different viscosities were prepared with two kinds of surfactants. The magnetoviscous effects of the prepared magnetic fluids under different working conditions were found through rheological experiments. The viscosity of the three samples decreased at most by about 100 times with the shear rate increasing. An experimental platform was designed and built for the washout tests. The entire process of magnetic fluids being washed away was obtained experimentally. The magnetic fluid of higher viscosity can remain stationary with lower magnetic force. The quantitative results show that the viscosity of the magnetic fluid has a significant influence on washout resistance under a magnetic field.

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Experimental research on effectiveness of the magnetic fluid seals for rotary shafts working in water

Abstract: ABSTRACT

Cited by 15 publications

References 5 publications

Theory analyses and applications of magnetic fluids in sealing

Theory analyses and applications of magnetic fluids in sealing

Multi-stage magnetic-fluid seals for operating in water – life test procedure, test stand and research results

Influence of High Viscosity and Magnetoviscous Effect on the Washout Resistance of Magnetic Fluid

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