Tribology as a Tool for Abnormality Diagnosis and Life Extension Techniques of Bearings

摘要

Tribology has played largely an important role as a maintenance tool of machinery. In particular, failures of machines having rotating parts are mostly caused by damage to bearings and there exist increasing demands for detecting damaged bearings at an early stage. This paper therefore introduces some tribological maintenance tools for abnormality diagnosis and life extension techniques of bearings. Such tools presented here are on-line analysis of wear debris in lubricating oils, compound sensing of both vibration and acoustic emission, and ultrasonic technique to detect the rolling and lubricating behavior in bearings under operation.