CENTRIFUGAL VIBRATION EXCITER WITH ADJUSTABLE UNBALANCE WEIGHTS Russian patent published in 2000 - IPC

FIELD: vibration facilities; devices for compacting ground, driving piles in and out. SUBSTANCE: proposed centrifugal vibration exciter with adjustable unbalance weights has shafts, unbalance weights mounted on shafts for radial displacement, plunger hydraulic cylinders whose housings are connected with unbalance weights and plungers, with shafts, hydraulic apparatuses made in form of three-line throttling hydraulic distributors of two-side hydraulic control with setting spaces and control spaces, spring installed in control space of one of hydraulic apparatuses, regulated pressure relief valve, pressure hydraulic line, drain hydraulic line, working hydraulic line, and hydraulic motors. Inlet of each of hydraulic apparatuses is connected with pressure and drain hydraulic lines, and outlet, with hydraulic cylinder of corresponding unbalance weight. EFFECT: improved operating characteristics and reliability, simplified design as compared with known centrifugal vibration exciter with adjustable unbalance weights. 9 cl, 2 dwg