MU Digital Repository
Logo

Stability of Flexibly Supported Oil Journal Bearings Using Non – Newtonian Lubricants: Comparison of Linear & Non – Linear Analysis

Raghunandana, K and Majumdar, B C and Maiti, R (2003) Stability of Flexibly Supported Oil Journal Bearings Using Non – Newtonian Lubricants: Comparison of Linear & Non – Linear Analysis. Journal of Tribology, 2 (1). pp. 1-6. ISSN 0742-4787

[img] PDF
3___Indian_Journal_of_Tribology.pdf - Published Version
Restricted to Registered users only

Download (3MB) | Request a copy

Abstract

The problem of oil – whirl instability in journal bearings is well recognized. The rotor, when subjected to oil – whirl besides spinning in the normal manner, wobbles around in the clearance space of the bearing. The most important feature of oil whirl instability is that unlike the critical speed resonance the amplitude of whirl often does not decrease after the onset speed has been passed. On the contrary, it increases with increasing speed. If corrective measures are not taken, the high amplitude vibrations may result in excessive wear, fatigue and even seizure. The effect of non – Newtonian behavior of lubricants, resulting from the addition of polymers, on the performance of flexibly supported hydrodynamic journal bearings is investigated. The sub – synchronous whirl stability of two symmetrical finite journal bearings has been studied using the linearized perturbation method and the non – linear transient analysis technique. A quantitative comparison for journal bearings with different L/D ratios, support stiffness and damping has been provided.

Item Type: Article
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 11 Apr 2013 10:27
Last Modified: 11 Apr 2013 10:27
URI: http://eprints.manipal.edu/id/eprint/79649

Actions (login required)

View Item View Item