HYDRO-DRIVE FOR CONTROL OF EXECUTIVE DEVICE OF MINING MACHINE

摘要

A hydro-drive for control of executive device of mining machine includes a hydro-pump distributor connected to power hydro-cylinder, the hydro-device for control of multiplier is arranged as a control valve with a spring-supported two-step slide-valve, the multiplier and the control valve have common body, the slide-valves are installed coaxially with gap between the end surfaces of the large stages of the common cavity with possibility of its connection with alternation to the discharge and drain lines by means of radial and axial channels in the slide-valve and radial openings in the body. To the body charging device is mounted, this affects pressure difference in the chambers. A distributor valve for changeover both to the multiplication mode and to the mode of liquid injection is connected to the lines. The hydraulic control device is arranged in such a way that the end sections can continuously move with the cone of the safety valve.