A Comparative Elastohydrostatic Analysis of CFV- and Capillary-Compensated Multirecess Hydrostatic/Hybrid Journal Bearing Operating with Micropolar Lubricant

Suresh Verma,Vijay Kumar,K D Gupta

doi:10.5402/2013/924802

Abstract

A comparative study on the performance characteristics of the flexible multirecess hydrostatic journal bearing system with constant flow valve and capillary restrictors has been presented considering the effect of micropolar parameters. The modified Reynolds equation for the flow of micropolar lubricant through the bearing has been solved using finite element method, and the resulting elastic deformation in the bearing shell has been determined iteratively. The results indicate that the micropolar parameters of the lubricant affect the performance of the flexible multirecess hydrostatic journal bearing system quite significantly.

Highlights

In hydrostatic lubrication, the lubricant is pushed between the surfaces by means of an external pressurization system
The present work deals with this comparison study, wherein the simultaneous solution of the modified Reynolds equation for micropolar lubricant and elasticity equations has been obtained to compare the performance of fourpocket flexible hydrostatic journal bearing compensated with constant flow valve and capillary restrictor
The comparison between the performance characteristics of the multirecessed hydrostatic/hybrid journal bearings compensated with constant flow valve (CFV) and capillary restrictors has been presented

Summary

Introduction

The lubricant is pushed between the surfaces by means of an external pressurization system. Nicodemus and Sharma [18] presented the analytical study of four-pocket-orifice-compensated hydrostatic/hybrid journal bearing system of various geometric shapes of recess operating with micropolar lubricant They concluded that the influence of micropolar effect of the lubricant on bearing performance is predominantly affected by the geometric shape of recess and restrictor design parameter. The present work deals with this comparison study, wherein the simultaneous solution of the modified Reynolds equation for micropolar lubricant and elasticity equations has been obtained to compare the performance of fourpocket flexible hydrostatic journal bearing compensated with constant flow valve and capillary restrictor

Analysis

Boundary Conditions

Solution Scheme

Results and Discussion

Conclusion