Vibration Analysis For Diagnostic Of local Faults In Rolling Element Bearing

Aidil Fariha, Othman (2008) Vibration Analysis For Diagnostic Of local Faults In Rolling Element Bearing. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The experimental studies were undertaken to investigate the local faults in rolling element bearings. It is important to identify the problems because nowadays, condition monitoring and prediction can be done for machinery faults diagnosis and improvement by using vibration analysis as the important role. On the other hand, bearing is like a heart to a machine, to make the machine works smooth especially in rotating parts. One of the most common and reliable techniques for detecting rolling element bearing problems is the Demodulation or Enveloping technique. This technique is derived from demodulating the high resonant frequency created by the impacts which are generated by the interactions between the rolling element and the defects. The envelope that is obtained from the demodulation process will thus be analyzed in the frequency domain. The demodulated spectrum will highlight the bearing defect frequencies which will not be buried under running speed harmonics and low frequency components. In this thesis, envelope detection have been chosen to diagnose the local faults in rolling element bearing because of the accurately of the measurement rather than other type of vibration analysis besides of the highlighted bearing defect frequencies.

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