Detection of journal bearing vapour cavitation using vibration and acoustic emission techniques with the aid of oil film photography

Abstract A journal bearing rig with transparent sleeve, a bronze bearing insert and an LED illuminator has been designed for rapid development of vapour cavitation and to carry out oil film photography. Vibration and acoustic emission have been monitored in real time as the vapour cavitation develops. Subsequently, parametric and signal based analysis of acoustic emission and monitoring of vibration has been carried out to develop condition monitoring parameters for early detection of vapour cavitation. In addition to this, simultaneous photography of oil film has been carried out to evaluate changes in vapour bubbles under different stages of experiment. The captured photographs have been image-processed for better visualisation of bubbles.

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