Influence of Magnetorheological Fluid Volume onto Obtained Critical Pressures on Rotary Shaft Seals

Abstract:

Structure and basal application of magnetorheological fluids as well as their application in rotary shaft seals, have been presented in this study. As the application of magnetorheological fluid in seals is relatively purely known, the conducted studies were aimed at defining their operational parameters. The most essential was manner of the MR fluid delivery into oil gap, mostly the applied fluid volume. Not sufficient volume of the MR fluid often results in non-uniform oil gap filling what in turn decreases the seal efficiency. Results of studies on MR fluid-based seal burst pressure, conducted on specially designed testing stand, have been presented. The results comprise three oil gap sizes of d=0,15mm, d=0,3mm and d=0,5mm, for tests conducted with various volume of MR fluid applied on single sealing stage. Comparative values of the seal burst pressures obtained for three oil gap sizes of multi-stage seal, with the same apparent volume of MR fluid (the same fluid and oil gap volume ratio), were also presented.

• Periodical: Key Engineering Materials (Volume 490)
• Pages: 119-127
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.490.119
• Online since: September 2011
• Authors: Marcin Potoczny, Bolesław Zachara
• Keywords: Magnetic Fluid, Magnetic Fluid Seal, Magnetorheological Fluid (MRF), Magnetorheological Fluids Seals, MR Fluid, Rotary Shaft Seals

References

[1] B.M. Berkovsky, V.G. Bashtovoy: Magnetic fluids and application handbook, Begell House Inc.,New York-Wallingford, (1996)

[2] B.M. Berkovsky, V.F. Medvedev, M.S. Krakov: Magnetic fluids; an engineering applications, Oxford Science Publications, (1993)

[3] T. Fujita, K. Yoshimura, Y. Seki, G. Dodbiba, T. Miyazaki: Characterization of magnetorheological suspension of seal, Journal of Intelligent Materials Systems and Structures, vol.10, (1999)

DOI: 10.1106/vut6-tftt-frld-ubqr

[4] S.R. Gorodkin, W.I. Kordonski, N.A. Protasewich: Оcenka wozmozhnosti ispol'zowanija magnitoreologicheskikh syspenzijj w uplotnitel'nykh ustrojjstwakh. Magnitnaja gidrodinamika, 1988, № 4, 128-131.

[5] W.I. Kordonski, S.R. Gorodkin: Magnetorheological fluid-based seal, Journal of Intelligent Materials systems and Structures, vol.7,(1996)

DOI: 10.1177/1045389x9600700518

[6] B. Wiślicki: Magnetic Fluids – properties and applications. Liquids supplies. Fuels, oils and lubricants in the exploitation. 2002, R.11, No. 93, 4-13.

[7] A. Milecki: Electro- and magnetorheological fluids and their applications in technology. Publisher of Poznan University of Technology, Poznań (2010)

[8] M.R. Jolly, J.W. Bender, J.D. Carlson: Properties of application of magnetorheological fluids, Journal of Intelligent Materials Systems and Structures, vol.10, (1999)

[9] T. Socaciu, M. Bucur , S. Mihai : Experimental research regarding magnetorheologic fluids. Interdisciplinarity in engineering. Scientific international conference, Tg. Mures – Romania, 15-16 November 2007. Inter-Ing (2007)

[10] Patent application P-390575. Measuring head to determine the boundary operational conditions of magnetic fluid seals.

[11] MRF-122EG, Magneto-Rheological Fluid, Lord Technical Data (USA)