Using Vibration Monitoring for Rolling Elements Bearing Inspection

Abstract

In Khartoum Refinery Company (KRC) Pump 1104B suffers of high vibration level. Vibration analysis techniques is used to find out the root causes of the pump vibration. The collected data from the pump indicates high vibration in the pump drive end (DE). After collected data, was uploaded to software in which set up database of measurement points. Spectrum analysis; was used. The analysis result indicates that the angular contact bearing in the pump drive end has been failed. During this work theoretical analysis through mathematical model had been done with the assumption that good bearing has good oil film damping coefficient to restrict the rolling elements movement while the shaft is rotating. The comparison between the mathematical analysis and the measuring data was almost similar. The visual inspection results after bearing box dismantling is angular contact bearing defect that confirmed the theoretical &software analysis of finding vibration source. These results can lead to apply this mathematical analysis as prediction tool to evaluate the bearing condition before total damage also can be applied with the equipment that has no analyzer software because the vibration phenomenon is same