The influence of the shape of the bucket teeth on the energy expended by the excavator when working on large-sized rocks
Based on the results of simulation of the impact on the bucket tooth of the EKG-5A excavator of the flow of pre-exploded rock, carried out using the Rocky DEM and ANSYS software, the forces of rock resistance to excavation and the power required by the excavator for various tooth shapes taken by them as abrasive wear were calculated. It is shown that as the teeth wear, accompanied by their shortening, an increase in the radius of the blunting area of their pointed part, the loss of symmetry and the acquisition of a curvilinear wear area, the forces that must be applied to excavate the blasted rock, as well as the power that is required for lifting and pressure excavator mechanisms, up to 2 may exceed the values of the indicated indicators for an excavator equipped with original unworn teeth.