Results and Discussions

Fault is incorporated in 2nd gear by removing one tooth from the gear. Frequency spectrum of the vibration signal shows amplitude of 2nd gear meshing frequency increases as well as amplitude of sidebands around gear meshing frequency also increases.

Fig 1: Output gearshaft with 2nd gear (a) healthy (b) one tooth broken



Fig 2: Vibration Frequency Spectrum at 31 Hz input shaft speed at full load





Fig 3: Vibration Frequency Spectrum at 37 Hz input shaft speed at full load



Fig 4: Vibration Frequency Spectrum at 43 Hz input shaft speed at full load