Krupko I. Justification of parameters of four-bearing walking mechanism of mechanical shovels.

The object of investigation is the regularities of formation of power and kinematic parameters of the drive of four-support walker gear during the movement of open-mine excavator. The purpose of dissertation is the substantiation of the structure and rational parameters of four-support walker gear for open-mine excavators on the basis of the established regularities of formation of loadings and kinematics in an eccentric drive. The methods of investigation based on fundamental regulations of the theory of gears, dynamics of machines, theories of multicriterion synthesis of mining machines, spatial multimass systems, the theory of similarity and modeling of mechanical systems and processes of their interaction with environment. Loading and power consumption of the drive of the four-support walker gear was defined experimentally on a physical model with measurement of electric and mechanical values and the adequacy of the investigation done on mathematical models was estimated by the comparative analysis of the results of theoretical and experimental researches. Practical value of the obtained results: practical recommendations of engineering calculation of four-support walker gear for the movement of mining machines are developed, which allow designing walker gears with eccentric drive. Novelty of work: for the first time theoretically established and experimentally confirmed the law of movement of an open-mine excavator with four-support walker gear; the mathematical model of walker gear is developed which adequately describes the process of movement of the machine and considers the design features of eccentric drive; rational parameters of basic perimeter and of eccentric shaft of of the drive of four-support walker gear are established. Results of the work are employed at JSC "Gorlovsky machine builder" and JSC NKMZ, "Donbass State Engineering Academy" Branch of employment: mining and handling mechanical engineering.