HYDRAULIC SYSTEM OF RUNNING GEAR OF CATERPILLAR-TRACKED TUNNELING MACHINES

摘要

FIELD: mining. SUBSTANCE: hydraulic system of running gear of caterpillar-tracked tunnelling machines has two hydraulic pumps, two hydraulic motors for driving the traction sprockets, hydraulic cylinders for tensioning caterpillar tracks, pressure and return hydraulic mains, reducing valve, check valve, safety valve and OR-hydraulic valve. Each hydraulic motor is hydraulically connected through respective hydraulic control valve to respective hydraulic pump. Inlets of OR-valve are hydraulically connected, respectively, with pressure hydraulic mains. Outlet of OR-hydraulic valve is hydraulically connected with inlet of reducing valve. Outlet of reducing valve is hydraulically connected with check valve. Outlet of check valve and inlet of safety valve are hydraulically connected with working spaces of hydraulic cylinders for tensioning the caterpillar tracks. Outlet of safety valve is hydraulically connected with return hydraulic mains. EFFECT: higher efficiency. 1 dwg