Multi-stage magnetic-fluid seals for operating in water - life test procedure, test stand and research results. Part II Results of life tests of multi-stage magnetic - fluid seal operating in water

• Autorzy: Matuszewski L.
• Języki publikacji: EN

Abstrakty

EN

The edge criteria for magnetic-fluid seals durability research were described in previous article [24] and now the tests results are presented. The tests were made with three magnetic fluids using various magnets quantity in magnetic assemblies. If values obtained in the repeated test deviated by more than 10 % from results of the first test an additional control test was made for final characteristics. The characteristics are: critical pressure, critical motion velocity and working life of the seal. The test stands were prepared for particular seals dimensions and results of tests are presented in the form of tables, cross section draws and diagrams. In conclusion one can see that multi-stage magnetic-fluid seals could be efficiently used in water for rotating shaft seals in a limited range of motion velocity and cycles quantity. Nevertheless a particular applications can be provided by magnetic-fluid seals only.

Słowa kluczowe

EN

shaft sealing; magnetic fluid; utility water; seal durability; critical pressure; critical motion velocity

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2013
• Tom: nr 1
• Strony: 39--47
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Matuszewski L.

• Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk, POLAND

Bibliografia

• 1. Szydło Z., Zachara B., Ochoński W.: Ferro-magnetic fluids and their application in machinery engineering (in Polish). 1st Conference on Automation of Machines, Devices and Processes, Krynica, 1999.
• 2. Rosensweig R.E.: Ferrohydrodynamics. Dover Publications, Inc. Mineola, New York, 1997.
• 3. Rinaldi C., Chaves A., Elborai S., He X., Zahn M.: Magnetic fluid rheology and flows. Current Opinion in Colloid & Interface Science, Vol.10, Issue 3-4, October, 2005.
• 4. Orlov D. B., et al.: Eksperimentalnoe issledovanie resursa magnitozidkostnych uplotnenij pri germetazicii zidkich sred. Magnitnaya Gidrodinamika, No. 4, pp.127-130, 1989.
• 5. Kurfess J., Muller H. K.: Sealing liquids with magnetic fluids. Journal of Magnetism and Magnetic Materials,85, 1990
• 6. Vihersalo J., et al.: Sealing of Liquids with Magnetic Fluid Seals. Proc. of 6th Nordic Symposium on Tribology, NORDTRIB’94, Uppsala, Sweden, 12-15 June 1994.
• 7. Kim Y. S., Nakatsuka K., Fujita T., Atarashi T.: Application of hydrophilic magnetic fluid to oil seal. Journal of Magnetism and Magnetic Materials, 201 (1999), pp. 361-363.
• 8. Liu T., Cheng Y., Yang Z.: Design optimization of seal structure for sealing liquid by magnetic fluids. Journal of Magnetism and Magnetic Materials, Vol. 289, Complete, March, 2005.
• 9. Guo C., Feng S.: Sealing mechanism of magnetic fluids. Journal of Shanghai University (English edition), 2006, 10(6), pp.522-525.
• 10. Chorney Alvan F.; Mraz Will.: Hermetic Sealing with Magnetic Fluids. Machine Design; May 7, 1992, 64, 9, ProQuest Science Journals p. 79.
• 11. Mitamura Y., Arioka S., Sakota K., Azegami M.: Application of a magnetic fluid seal to rotary blood pumps., J Phys Condens Matter. 2008 May 21;20(20):204145. doi: 10.1088/0953-8984/ 20/20/204145. Epub 2008 May 1.
• 12. Szydło Z., Matuszewski L.: Experimental research on effectiveness of the magnetic fluid seals for rotary shafts working in water. Polish Maritime Research, 2007, vol. 14, No. 4, pp. 53–58.
• 13. Szydło Z., Matuszewski L.: Ring thruster – a preliminary optimisation study of ferrofluid seal and propeller. Polish Maritime Research, 2007, Spec. issue S1, pp. 71-74.
• 14. Szydło Z., Matuszewski L.: The application of magnetic fluids in sealing nodes designed for operation in difficult conditions and in machines used in sea environment. Polish Maritime Research, 2008, Vol. 15, No. 3, pp. 49-58.
• 15. Szydło Z., Ochoński W., Zachara B.(inventors): A measurement head for testing parameters of seals with ferro-magnetic fluid (in Polish).Patent specification No. PL 377598 A1, submitted on 2005-10-12 by Mining and Metalurgy Academy, Cracow, published in Bulletin of Polish Patent Office, 2007, No. 8, p. 22
• 16. Bonvouloir, J.: Experimental Study of High Speed Sealing Capability of Single stage Ferrofluidic Seal. ASME Transactions, Journal of Tribology, Vol.119, July 1997
• 17. Ferrolabs, Inc. Sterling, VA United States, http://www.ferrolabs. com/ 2010
• 18. Szydło Z., Matuszewski L.: Life tests of a rotary single-stage magnetic-fluid seal for shipbuilding applications. Polish Maritime Research. 2011,Vol. 18, No. 2, pp. 51-59.
• 19. Szydło Z.: High speed magnetic fluid seal operating in water environment. 17th International Colloquium on Tribology, 19-21 January 2010, Book of synopses 2010/(Ed.) Wilfried J. Bartz Ostfildern: Technische Akademie Esslingen, 2010.
• 20. Szydło Z.: Determination of tribological characteristics and limiting operational conditions of ferro-magnetic seals (in Polish). Report on realization of the KBN research project No. 7T07B 02412. Publ. by Mining and Metallurgy Academy, Cracow, 2000.
• 21. Jibin Zou, B, Jiming Zou, and Jianhui Hu.: Design and pressure control of high pressure differential magnetic fluid seals. IEEE Transactions on Magnetics, Vol. 39, No. 5, September 2003
• 22. P.P.H.U. “ENES” Ltd, Paweł Zientek, products performance list, Warszawa, www.magnesy.pl/ 2010
• 23. PZ HTL Ltd, Manufacurer’s datasheet
• 24. Matuszewski L.: Multi-stage magnetic-fluid seals for operating in water, life test procedure, test stand and research results Part I: Life test procedure, test stand and instrumentation, Polish Maritime Research. 2012 Vol 19; pp. 62-70