Analysis of hybrid journal bearing for non-Newtonian lubricants

Abstract

The performance characteristics of capillary compensated hole-entry hybrid journal bearing systems have been studied theoretically. The analysis considers the generalized Reynolds equation governing the flow field of lubricant, having variable viscosity, taking the equation of lubricant flow through a capillary restrictor as constraint. The non-Newtonian lubricant is assumed to follow the cubic shear stress law. The results obtained from the study suggest that bearing static performance characteristics can be optimized for the particular bearing operating conditions by proper selection of parameters such as bearing land width ratios (ā b ), the restrictor design parameter (C s2 ), and the non-linearity factor (K ).

A Study on the Influence of Combined Elastic and Micropolar Effects on Hole-Entry Hybrid Journal Bearing

“…Nagaraju et al [16] in their study showed how the roughness of surface and elasticity in bearing shell affects the performance in journal bearings and revealed that roughness can compensate the effects produced in performance due to flexibility. Duvedi et al [17] used non-Newtonian lubricants to find the performance of hybrid journal bearings. Further, a use of dynamic trajectories, poincare maps, bifurcation diagrams and maximum Lyapunov exponent was done by Chang and Chen [18] while analyzing the nonlinear response of flexible rotor mounted on journal bearing lubricated with micropolar lubricant.…”

Effect of Dam Location on the Performance Characteristics of Two -Lobe Bearing: Micropolar Lubricated

“…Rahamatabadi et al [7] evaluated the performance of circular and lobed bearing using generalized differential quadrature (GDQ) method and reported that the results were better as compared with FEM results. Hybrid journal bearing under non-newtonian fluid were examined by [9] and suggested that performance of bearing was greatly affected by operating condition and selection of parameters. [10] modified the fluid to micropolar fluid and examined the performance of multirecess hydrostatic journal bearing; flexibility effect of bearing shell is taken in to account.…”