Detection of Fault in Gearbox System Using Vibration Analysis Method

Saurabh S. Shahapurkar, Hemant S. Pansare, Prashant P. Dhebe, Chetan S.Wagh, Prof. Amit Desale

In gearboxes, load fluctuations on the gearbox and gear defects are two major sources of vibration. Further, at times, measurement of vibration in the gearbox is not easy because of the inaccessibility in mounting the vibration transducers. For detecting different type of gear tooth faults a experimental data is taken from single stage gearbox set up with help of FFT analyser. Vibration analysis techniques are used for detection of fault in gear system, fluctuation in gear load such as a method for detecting the evolution of gear faults based on time- frequency analysis through Matlab. The various types of defects are created on gear tooth such as one corner defect, two corner defect, three corner defect, and Missing tooth. By comparing Signals of defective condition with healthy (ok) condition through FFT analyser in which analysis is carried out with the decomposed current signal to trace the sidebands of the high frequencies of vibration. The validation is done successful by taking input signal from FFT analyser to Matlab program for calculating effective statistical parameters in defective condition for time & frequency domain analysis. The actual position in angle of rotation for one tooth missing in gearbox is also investigated by using Matlab program. It is also helpful tool for health monitoring of gears in different conditions.