Evaluation of Single-bucket Excavators Energy Consumption

It is shown that with the increase in capacity and weight of excavators their specific indices of functioning remain practically at the same level corresponding to the energy consumption value (available power) for excavators of each type (electromechanical or hydraulic). That value depends on the type of operational equipment, the ratio between linear and weight parameters and other factors. New layout of the operational equipment is suggested, featuring an internal closure of workloads within its operating element. The layout includes the operating element in the form of two oppositely arranged buckets and the closure mechanism. Energy efficiency index for single-bucket excavators is proposed.