Static and dynamic characteristics of journal bearings with non-newtonian palm-based oils

• Autorzy: Mongkolwongrojn M. , Aiumpornsin Ch.
• Konferencja: Second International Conference on Engineering Rheology ICER 2003
• Języki publikacji: EN

Abstrakty

EN

This paper presents the investigation of the static and dynamic characteristics of hydrodynamic journal bearings lubricated with non-newtonian palm-based oils. The palm oil was mixed with 0.2% ZDTP and 1% ZDTP to reduce oxidation and increase lubricity. In this study, the power law model is proposed as a rheology model of palm-based oil and the relationship between the shear stress and shear rate was obtained experimentally. The time-dependent modified Reynolds equation, and adiabatic energy equation were formulated for full circular bearings. Finite difference method was used to calculate both the static and dynamic characteristics of the bearings such as pressure distribution, temperature distribution, attitude angle, stiffness and damping coefficients. The results shows that the palm-based oils have potential to use as a biodegradable lubricant.

Słowa kluczowe

EN

non-Newtonian lubricant; hydrodynamic journal bearing; modified Reynolds equation; adiabatic energy equation; static and dynamic characteristics

PL

hydrodynamika; płyn nienewtonowski; łożysko poprzeczne

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2003
• Tom: Vol. 8, no spec.
• Strony: 79--86
• Opis fizyczny: Bibliogr. 5 poz., tab., wykr.

Twórcy

autor

Mongkolwongrojn M.

• lectro-Mechanical Engineering Lab, ReCCIT Faculty of Engineering King Mongkut's Institute of Technology, Ladkrabang, Bangkok, 10520, THAILAND

autor

Aiumpornsin Ch.

• King Mongkufs Institute of Technology, Ladkrabang, Bangkok, 10520, THAILAND

Bibliografia

• [1] Majumdar B.C. (1975): The thermohydrodynamic solution of oil journal bearing. Wear, vol.31, pp.287-294.
• [2] Dien I.K. and Elrod H.G. (1983): A generalized steady-state Reynolds equation for non-Newtonian fluids with application to journal bearings. - Journal of Lubrication Technology, vol,105, pp.385-390.
• [3] Jang J.-Y. and Chang Ch.-Ch. (1988): Adiabatic analysis of finite width journal bearings with non-Newtonian lubricants. - Wear, vol.l22, pp.63-75.
• [4] Lund J.W. (1987): Review of the concept of dynamic coefficients for fluid film journal bearings. - Journal of Tribology vol,109, pp.37-41.
• [5] Mongkolwongrojn M. and Arunmetta P. (2002): Theoretical characteristics of hydrodynamic journal bearings lubricated with soybean-based oil. - J. Synthetic Lubrication, vol.l9, No.3.