The influence of oil’s exploitation time on load carrying capacity in a slider bearing

• Autorzy: Sikora G. , Miszczak A.

Identyfikatory

DOI

10.5604/12314005.1166028

• Języki publikacji: EN

Abstrakty

EN

In this paper, authors are presenting conclusions of the numerical calculations of pressure distribution and capacity in a slider bearing with taking changes of oil viscosity in exploitation time into account. Changes of the engine oil’s viscosity, which depend on the exploitation time, were determined on Haake Mars III rheometer and the conclusions were published in Solid State Phenomena and Logistyka in 2015. Numerical calculations were performed by solving of Reynolds equation, using finite difference method and own calculation procedures in Mathcad 15. Reynolds equation was developed by solving the continuity equation and the momentum conservation equation from the fundamentals. For the considerations, the laminar and stationary lubricating of the slider bearing of finite length and full angle of wrap were taken. Assumption of the stationary flow concerns lack of changes in flow parameters in short period of considered phenomena, f. ex. in one hour. Smooth and non-porous bushing were assumed. The aim of this paper was preliminary estimation of influence of viscosity changes in the exploitation time on the load carrying capacities of the cross slider bearing. Wherefore, the viscosity changes dependence on the pressure, temperature and also shear rate, were not taken into account. The basic equations were developed to the non-dimensional form and estimated according to the thin layer theory. In the calculations, the Reynolds boundary conditions concerning pressure distribution were taken into account. Preliminary calculations were performed for different models of viscosity changes in time and circumstances, where the viscosity increases and decreases in exploitation time.

Słowa kluczowe

EN

oil ageing; numerical calculations; Reynolds equation; pressure distribution; load carrying capacities; viscosity changes in time

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2015
• Tom: Vol. 22, No. 3
• Strony: 207--212
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Sikora G.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

autor

Miszczak A.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Böhme, G., Strömungsmechanik nicht-Newtonscher Fluide, Teubner Studienbücher Mecha-nik, Stuttgart 1981.
• [2] Lang, O. R., Steinhilper, W., Gleitlager, Springer Verlag, Berlin-Heidelberg-New York, 1978.
• [3] Miszczak, A., Analiza hydrodynamicznego smarowania ferrocieczą poprzecznych łożysk ślizgowych, Monografia, Fundacja Rozwoju Akademii Morskiej, Gdynia 2006.
• [4] Sikora, G., Miszczak A., Równania hydrodynamicznego smarowania poprzecznych łożysk ślizgowych z uwzględnieniem starzenia się oleju, Logistyka, 4, 2015, in printed.
• [5] Sikora, G., Miszczak A., Viscosity in exploitation time analysis of the lubricating oil used in the combustion engine of the personal car, Solid State Phenomena, Vol. 220-221, pp. 271-276, 2015,.
• [6] Sikora, G., The studies on lubricity and contamination analysis of the personal car’s lubricating oil with taking oil ageing into account, Journal of KONES Powertrain and Transport, Vol. 20, No. 3, pp. 375-379, 2013.
• [7] Wierzcholski, K., Mathematical Theory of Lubrication, Politechnika Szczecińska, Szczecin 1992.
• [8] Wierzcholski, K., Teoria niekonwencjonalnego smarowania łożysk ślizgowych, Prace Nau-kowe Politechniki Szczecińskiej, nr 527, Szczecin 1995.