Vibration Monitor and Diagnosis for Wear Faults of Roiling-Element Bearings Cheng Hui Zhu KunquanThe abrasive wear of rolling-element bearings came out usually in engineering.Analogue abrasive wear test and vibration signals analysis have been made in this paper.Through ana- lyzing the second effect of abrasive wear of bearings,the sensitive dianosing parameter and method which are different from diagnosing other faults have been obtained.In this paper, the effective method that diagnosis wear fault by means of crest factor are pointed.Varying rults of spectral envelop energy have been analyzed.Then microcomputer system of on-line monitor and dianosis wear fault and wear extent have been established.Finally,the concept of the impulse of precision disappear fault of rolling-element.bearings is put.This concept can be used for determining ralations that extent of precision grades decrase and shock vibra- tion and bearings wear extent.Wear;;Crest factor;;Envelop energy;;Precision disappear fault;;Diagnosis