fine-grained bulk material

Influence of friction characteristics of a bulk material on its outflow from a conical hole

Taking into account the adhesive interaction of the product with the walls of the hopper, a mathematical model of the fine-grained bulk material stress state in a conical hopper hole under vibration is proposed.  A discrete environment model was used for analysis.  This model was based on considering the equilibrium of an elementary volume with an infinitesimal thickness.  An analytical dependency was established, allowing an estimate of the influence of frictional factors on the fine-grained bulk material stress state, thereby enabling its modification by adjusting cer

Modeling of a bulk material stress state in a conical hopper hole under vibration action

A model of a fine-grained bulk material stress state in a conical hopper hole under vibration during material unloading is proposed.  For the study, it is used a model of a discrete medium based on a balance of a small thickness elementary volume, in which the stress redistribution occurs by opening an outlet at the hopper bottom.  A formula for determining the material radial stress in the discharge conical hopper hole is obtained, taking into account all force factors influencing the bulk material behavior.  The influence of humidity, shape and geometric parameters of the hopper, and vibr