VIBRATION ANALYSIS OF FLEXIBLE COUPLING BY CONSIDERING SHAFT MISALIGNMENT

Abstract

In reciprocating-rotating machines, flexible couplings are widely used in many applications, such as marine gear box and diesel engine. Vibration monitoring is highly capable of detecting any abnormalities on flexible couplings before failure occurs. In this paper, vibration measurement is utilised on a rotor dynamic test apparatus to predict vibration spectrums for various motor revolutions. A self-designed simplified type flexible coupling was used in the experiments. Vibration spectrums captured on two units of healthy rolling element bearings in three different directions at various speeds were analysed, with the measurements found to have high level of accuracy. Based on the procedure developed in this experimental work, condition monitoring (CM) for rotor-flexible coupling-bearing systems can be developed in the future.
Keywords: Flexible coupling; vibration monitoring; fundamental frequency; vibration spectrums;
accuracy.

Description