固形異物混入油中における転がり軸受の摩擦摩耗挙動

概要

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Friction and wear behaviors of rolling bearing were studied in contaminated oil containing white fused alumina particles. The friction and wear processes were monitored using a spectrometricoil analysis program (SOAP) and vibration measurement method. Alumina particles were 3 and 16μmin size. The particles were mixed with turbine oil (ISO VG 46) and the concentration was varied in therange of 0 to 0.15g/l. The following conclusions were obtained in this study. (1) The contaminant didnot affect strongly on the friction coefficient when the size was 3μm. In contrast, the friction coefficientdecreased significantly when the size was 16μm and the concentration was above 0.1g/l. (2) Iron elementconcentration increased with the run time in the contaminated oil. The increasing rate became high as thecontaminant size increased. (3) The contaminant particles accelerated fatigue wear that caused flaking onthe inner and outer ring surfaces. Abrasive wear due to rolling and sliding of contaminant was predominanton the ball and retainer. (5) The probability density function of vibration waveform changed significantlydepending on the wear of bearing.