VIBRATION SINKER WITH HYDRAULIC MOTOR Russian patent published in 1999 - IPC

FIELD: construction machinery and equipment. SUBSTANCE: vibration sinker is intended for sinking pile members into ground. Sinker has following components: unbalanced weights, hydraulic motors connected with shafts of unbalanced weights, head-piece with hydraulic cylinder, main hydraulic pump, additional hydraulic pump which is installed in parallel to main pump, safety valves, normally open pressure valve having its inlet opening connected with hydraulic pressure line of main hydraulic pump. Outlet opening of pressure valve is connected with return hydraulic line. Also provided are hydraulic control lines connected with spaces of head-piece hydraulic cylinder. Three-position four-line hydraulic control valve has its inlet connected with pump. Hydraulic working lines of control valve are connected with hydraulic cylinder and hydraulic control lines of pressure valve. Also included in hydraulic system of sinker are hydraulic pressure lines of main hydraulic pump and additional hydraulic pump, combined hydraulic return line connected to suction hydraulic line of main hydraulic pump, cooler installed in hydraulic return line, cooler fan, hydraulic motor connected with fan shaft, throttle installed between hydraulic pressure line of additional hydraulic pump and inlet of hydraulic motor, filter installed in hydraulic return line downstream of cooler, hydraulic tank, safety valve and filter which are installed between hydraulic return line and hydraulic tank, suction hydraulic line of additional hydraulic pump connected with hydraulic tank. Aforesaid embodiment of vibration sinker ensures higher operational reliability. EFFECT: higher efficiency. 1 cl, 1 dwg