Performance Characteristics of Two-Lobe bearings operating with non-Newtonian Lubricants

Jagannath, K and Raghunandana, K and Chincholkar, A M (2007) Performance Characteristics of Two-Lobe bearings operating with non-Newtonian Lubricants. Journal of Solid Mechanics and Materials Engineering, 1 (4). pp. 421-430. ISSN 1880 – 9871

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Abstract

This study presents a steady-state and transient solution for a finite-width journal bearing operating with non-Newtonian lubricants, obeying power-law model. A non-linear transient analysis is carried out and the orbital stability of the journal is ensured by solving the equation of motion by fourth-order Runge-Kutta method. Using the expression for eccentricity ratio for the lower and upper lobe and the film thickness for each lobe, the modified Reynolds equation is solved separately for each lobeby finite difference technique with successive over-relaxation scheme. Performance parameters like Sommerfeld number, load carrying capacity, attitude angle, flow and friction parameters are determined and compared with the established results for Newtonian lubricants. It is found that non-Newtonian effects are very prominent in determining load carrying capacity, flow and friction characteristics of two-lobe bearings. Stability parameters for two-lobe bearings are considerably higher compared to circular bearings; hence these bearings are better suited for applications where whirl instability limitsthe speed at which the bearing can be operated.

Item Type: Article
Uncontrolled Keywords: Non-Newtonian lubricants, two-lobe bearing, Stability
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 26 Jul 2014 10:03
Last Modified: 26 Jul 2014 10:03
URI: http://eprints.manipal.edu/id/eprint/140244

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