DYNAMIC CHARACTERISTICS OF WIDE EXPONENTIAL FILM-SHAPE SLIDER BEARINGS LUBRICATED WITH A NONNEWTONIAN COUPLE STRESS FLUID

Authors

Jaw-Ren Lin, Professor, Department of Mechanical Engineering, Nanya Institute of Technology, P.O. Box 324-22-59, Jhong-li, Taiwan 320.Follow
Rong-Fang Lu, Assistant Professor, Department of Mechanical Engineering, Nanya Institute of Technology, P.O. Box 324-22-59, Jhong-li, Taiwan 320.
Chi-Ren Hung, Instructor, Department of Mechanical Engineering, Nanya Institute of Technology, P.O. Box 324-22-59, Jhong-li, Taiwan 320.

Abstract

On the basis of the Stokes micro-continuum theory, the nonNewtonian effects of couple stress fluids upon the dynamic characteristics of wide exponential-shaped slider bearings are presented in this paper. To take into account the couple stress effects arising from a Newtonian lubricant blended with various additives, the nonNewtonian couple-stress dynamic Reynolds-type equation is applied to calculate the bearing dynamics. According to the results obtained, the effects of couple stresses signify a decrease in the friction parameter and the volume flow rate, as well as an increase in the loadcarrying capacity, the dynamic stiffness coefficient and the dynamic damping coefficient for the exponential-shape slider bearing. Comparing with those of the inclined plane bearing, the exponential shaped slider bearing designed at larger profile parameters provides not only smaller required volume flow rates, but also higher loadcarrying capacities and better dynamic stiffness and damping characteristics. These improvements of bearing dynamics are more pronounced with increasing values of the non-Newtonian couple stress parameter.

Recommended Citation

Lin, Jaw-Ren; Lu, Rong-Fang; and Hung, Chi-Ren (2006) "DYNAMIC CHARACTERISTICS OF WIDE EXPONENTIAL FILM-SHAPE SLIDER BEARINGS LUBRICATED WITH A NONNEWTONIAN COUPLE STRESS FLUID," Journal of Marine Science and Technology: Vol. 14: Iss. 2, Article 4.
DOI: 10.51400/2709-6998.2062
Available at: https://jmstt.ntou.edu.tw/journal/vol14/iss2/4