device to prevent from schlappseilbildung a stripper, tiefofenkran o.dgl crane

摘要

The handling tackle for ingots etc., is suspended on hoist ropes reeved from the winch drum round upper and lower pulley blocks to an anchor point on the crane crab. The pulleys (2, 4) in the upper block slide under the action of tensioning devices, each equipped with a damping device acting in one direction. The upper block can have a rope (10) attached to it, and reeved round a pulley (11) in a stationary mounting to the tensioning device, typically a counterweight (7). The damping device is of a hydraulic type and the system also includes automatic means for compensating for loss of hydraulic fluid.