Affiliation:
1. School of Mechanical Engineering Shri Mata Vaishno Devi University (SMVDU) J&K and Government Polytechnic College Jammu Katra India
Abstract
AbstractThis study presents the impact of full and partial surface waviness on the dynamic and stability performance of the journal bearing. The Reynolds equation is modified to account for the impact of surface waviness, and the lubricant domain is discretized using the Finite element method to obtain dynamic characteristics such as stiffness and damping coefficients and stability parameters, that is, threshold speed. Different wave numbers in the axial, circumferential and mixed directions are considered at variable wave amplitudes in different regions at an average eccentricity ratio of 0.6 to obtain the optimum values. The obtained results reveal that by application of waviness in the full region and partial waviness in the pressure‐reducing region on the bearing surface provides the enhanced value of stability parameter, fluid film stiffness and dynamic coefficients as compared to the simple journal bearing under the same working conditions.
Subject
Materials Chemistry,Surfaces, Coatings and Films
Reference43 articles.
1. Theoretical and experimental determination of the dynamic characteristics of a hydrodynamic journal bearing;Parkins DW;J Tribol,1979
2. Review of the Concept of Dynamic Coefficients for Fluid Film Journal Bearings
3. MajumdarBC BreweDE.Stability of a rigid rotor supported on oil‐film journal bearings under dynamic load. In National Seminar on Bearings 1987 Jan 1 (No. E‐3727).
4. Stability of Finite Journal Bearings–-from Linear and Nonlinear Bearing Forces
5. Experimental study of journal bearings with undulating journal surface