EXPERIMENTAL INVESTIGATION AND FAULT DIAGNOSIS THROUGH CBM TECHNIQUES FOR ANTIFRICTION BEARING OF MILL FAN

This project is concentrated on fault diagnosis in anti-friction bearings, at an early stage, to stop the catastrophic failure of Mill fan motor, and to find the root cause of failure component. It utilizes correlation of vibration data i.e. Overall amplitude, FFT spectrums and time waveform signals. It helps in not only finding bearing faults, but also to identify the root cause for its deterioration. Experiments are carried out by taking overall vibration readings in no-load condition on Drive and Non-Drive Ends of motor bearing housings in the tri-axial direction using the accelerometer. Based on readings, it is observed that dominating vibration amplitude observed at Motor Drive End bearing in vertical and axial directions only, the pattern directing towards the localized problem do not influence the other bearing in the equipment. In the FFT spectrums of motor bearing, dominating peaks appeared at 3960cpm, which is matching Harmonic Frequencies of rotating RPM of the motor. The above observations, conditions and predominant frequencies appeared in the spectrums, directing towards suspicion of bearing condition.