Experimental analysis on fault detection for a direct coupled rotor-bearing system

Rotating machinery is becoming faster and lightweight due to the advanced technologies made in engineering and materials sciences. It is required them to run for longer periods of time. All of these factors mean that the detection, location and analysis of faults play a vital role in highly reliable operations. Using vibration analysis, the condition of a machine can be periodically monitored. In this study, dynamic behavior of a direct coupled rotor-bearing system is investigated. Experimental vibration analyses in the vertical direc- tion of the system are implemented. Vibration monitoring with trend analysis and spec- trum graphs are employed to diagnose the excessive vibration source(s). It is seen that the rotating machineries can have one or more vibration sources. The vibration values obtained from each bearing show that the main excessive vibration sources in the system stem from mechanical looseness and misalignment.

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