Modeling Impulsive Ball Mill Forces Effects on the Dynamic Behavior of a Single-Stage Gearbox

Gearboxes are frequently used in the mining industry, especially for power transmission between electric drive and ball mill; besides extreme complexity of a mill gear system, fault diagnosis by vibration analysis can be easily distorted presence impulsive noises due to pulses on shell. Although several works literature related influence an noise accuracy diagnosis, no dynamic model exists yet that explain these forces behavior gearboxes. This paper presents new approach determine grinding crack defects diagnosis. is based hybrid numerical 24-degree-of-freedom gearbox, simulating one train two shafts. The impact drum modelled discrete element method (DEM). ball-filling rate (Fr), speed (Nr), size (Db) considered study this phenomenon. simulations results show time series representation, fast Fourier transform, short-time transform (STFT), acceleration significantly affected forces, developing balls governed studied parameters.