HYDRAULIC CONTROL ARRANGEMENT FOR OPERATING A WINCH WITH EASING, HOISTING AND MOORING MODES

摘要

The invention relates to a hydraulic control arrangement for operating a winch with easing, hoisting and mooring modes comprising an adjustable hydraulic motor (12). The arrangement comprises a pilot control device (65) with a control lever (81) which can be arbitrarily actuated and which can be displaced from a neutral position in opposing directions within a specific slackening angle range (85) and a specific hoisting angle range (86). In prior art, in order to actuate the mooring mode, the control lever (81) is blocked at a specific point in the hoisting angle range (86). According to the invention, the control lever (81), when viewed from the neutral position, can be displaced beyond the hoisting angle range (86) within a mooring angle range (87). As the displacement of the control lever (81) increases in said mooring angle range, the hydraulic motor (12) is adjusted towards a greater absorption volume and thus towards a greater torque and an increased cable tension. This contradicts the usual concept that as the displacement of a control lever (12) increases, i.e. as the angle of movement increases, the capacity which is controlled by said lever also increases.