Influence of local bush wear on properties of water lubricated marine stern tube bearings

• Autorzy: Litwin W.
• Języki publikacji: EN

Abstrakty

EN

In recent years more and more frequently can be met ships in which propeller shaft water-lubricated polymer bearings have been applied. It results from their simplicity and associated relatively low initial and operational cost as compared with the complex classical sealed system based on oil-lubricated bearings. It is worth mentioning that the water-lubricated bearings are also environmentally friendly as no risk of pollution with lubricating oil used in classical systems, is involved. Design procedure of bearings in question based on materials available from their producers is relatively simple. However the calculating of such bearings creates many problems. For calculating the hydrodynamic lubricating theory is as a rule used and elastic bush flexibility taken into account. In the case of greater loads when lubricating film is very thin to achieve a proper solution is very difficult. For this reason is proposed a novel method in which bush local wear effect can be accounted for. Such phenomenon has been observed during experimental tests of heavy-loaded water-lubricated slide bearings. With the use of the applied calculation algorithm bush local wear close to its edges can be taken into account, and - in consequence - a greater bearing capacity can be achieved.

Słowa kluczowe

EN

water-lubricated bearing; bearing systems; propeller shaft bearing systems

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2011
• Tom: nr 1
• Strony: 32--36
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Litwin W.

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

Bibliografia

• 1. Litwin W.: Marine water lubricated main shaft bearings, problems, theoretical and experimental research. Polish Maritime Research No. 4, Vol. 16, 2009
• 2. Litwin W.: Water – An Extraordinary, Ordinary Lubrication Liquid. Influence Of Water Salinity, Pressure And Temperature On Water Lubricated Bearings Properties. ASME/STLE International Joint Tribology Conference October 17 20, 2010, San Francisco, California, USA
• 3. Litwin W.: Influence of main design parameters of ship propeller shaft water-lubricated bearings on their properties. Polish Maritime Research No. 4 (67), Vol. 17, 2010
• 4. Litwin W.: Water Lubricated Marine Stern Tube Bearings – Attempt At Estimating Hydrodynamic Capacity. ASME/STLE International Joint Tribology Conference October 19 21, 2009, Memphis, Tennessee, USA
• 5. Litwin W.: Marine water lubricated stern tube bearings – calculations and measurements of heavy loaded bearings. STLE/ASME International Joint Tribology Conference October 20 - 22, 2008, Miami, Florida, USA
• 6. Ramalho A.: A geometrical model to predict the wear evolution of coated surfaces. Wear, 264 (2008)
• 7. Sfantos G. K., Aliabadi M. H.: Wear simulation using an incremental sliding Boundary Element Method, Wear, 260 (2006)
• 8. Nikolakopoulos P. G., Papadopoulos C. A.: A study of friction in worn misaligned journal bearings under severe hydrodynamic lubrication. Tribology International, 41 (2008)
• 9. Bouyer J., M. Fillon, and I. Pierre-Danos: Influence of Wear on the Behavior of a Two-Lobe Hydrodynamic Journal Bearing Subjected to Numerous Startups and Stops. ASME Journal of Tribology, January 2007, Vol. 129
• 10. Wang, W., Wong, P.L., Guo, F.: Application of partial elastohydrodynamic lubrication analysis in dynamic wear study for running-in.Wear, 2004,Vol. 257.