HYDRAULIC DRIVE APPARATUS FOR DECK CRANE, CRANE APPARATUS, CONTROL APPARATUS FOR HYDRAULIC PUMP, AND SHIP

摘要

Disclosed is a hydraulic drive device for deck cranes which is capable of reducing wasted drive energy and the generation of noise caused by the discharge of operating oil from the hydraulic pump when the hydraulic device for deck cranes is idling. The hydraulic drive device (100) for deck cranes has: hydraulic actuators (130,170,185) which make the hydraulic device move; hydraulic pumps (120,160) which supply operating oil to the hydraulic actuators via an operating oil supply line; and a control unit (250) which controls the flow rate of the operating oil supplied to the hydraulic actuators in response to an operation which commands the movement of the hydraulic device and which substantially minimizes the discharge flow rate of operating oil from the hydraulic pumps when the hydraulic actuators connected to the pumps do not move for at least a predetermined amount of time.