Evaluation of Lubricant Film Thickness for Ball Bearings 6207 & 6307 with Elliptical & Circular Contact Area
Year: 2017
Type: article
Abstract: Rolling element bearings are widely used in the industry, aviation, marine and automobiles.Failure of bearing may cause the damage of machineries and also impose threat to the life of human beings.Therefore it is essential to monitor the performance of bearing continuously.The major monitoring techniques used are based on Vibration Signature, Acoustic Emission Measurement, Interferometry, Chemical Analysis of Lubricant, Measurement of Lubricant Film Thickness by various methods (Resistance, Capacitance, Impedance Measurement, etc.).The present work is based on measurement of lubricant film thickness by Resistance Method using Hertz Contact Theory.The contact area between the races and balls plays a vital role for the formation of elastohydrodynamic lubricant film.Formation of elastohydrodynamic lubricant film is the deciding factor for the life of the bearing.To prolong the life it is important to maintain the lubricant film between the ball and races.Aim of this present paper is to calculate the Resistive lubricant film thickness based on elliptical and circular contact area for the deep groove ball bearing 6207 & 6307 for two lubricants, namely A and B. A comparison has also been made for Resistive elastohydrodynamic lubricant film thickness for elliptical and circular contact area.The results indicate that the method used is capable to predict the failure of Rolling Element Bearing.It is also observed that, the developed formula along with inexpensive measuring instruments can be effectively used for online condition monitoring of rolling element bearings with ease.Keyword-K Rolling element bearing, Elastohydrodynamic lubricant film, Elastohydrodynamic lubricant film thickness, Resistive film thickness (RFT), Hertz contact area, Circular contact area, Elliptical contact area, Elliptical Parameter, Complete elliptical integral of second kind.
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2594477142