A Comparative Study of the Monitoring of a Self Aligning Spherical Journal using Surface Vibration, Airborne Sound and Acoustic Emission

A Self aligning spherical journal bearing is a plain bearing which has spherical surface contact that can be applied in high power industrial machinery. This type of bearing can accommodate a misalignment problem. The journal bearing faults degrade machine performance, decrease life time service and...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.364 (1), p.12035-13
Main Authors: Raharjo, P, Tesfa, B, Gu, F, Ball, A D
Format: Article
Language:English
Subjects:
Acoustic emission
Acoustic emission testing
Airborne sensing
Alignment
Bearing
Comparative studies
Faults
Frequency ranges
Journal bearings
Misalignment
Monitoring
Performance degradation
Physics
Plain bearings
Self alignment
Sound
Vibration
Vibration measurement
Vibration monitoring
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Summary:A Self aligning spherical journal bearing is a plain bearing which has spherical surface contact that can be applied in high power industrial machinery. This type of bearing can accommodate a misalignment problem. The journal bearing faults degrade machine performance, decrease life time service and cause unexpected failure which are dangerous for safety issues. Non-intrusive measurements such as surface vibration (SV), airborne sound (AS) and acoustic emission (AE) measurement are appropriate monitoring methods for early stage journal bearing fault in low, medium and high frequency. This paper focuses on the performance comparison using SV, AS and AE measurements in monitoring a self aligning spherical journal bearing for normal and faulty (scratch) conditions. It examines the signals in the time domain and frequency domain and identifies the frequency ranges for each measurement in which significant changes are observed. The results of SV, AS and AE experiments indicate that the spectrum can be used to detect the differences between normal and faulty bearing. The statistic parameter shows that RMS value and peak value for faulty bearing is higher than normal bearing.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/364/1/012035