Wire rope spooling technology
Seilspul technology, particularly the application of the multi-layer rope payout, is a sophisticated mechanical method, wire cables in an orderly, precise geometry to spool on a cable drum many layers over each other.
History
The engineer Frank L. LeBus from Longview, Texas, in 1937 invented the principle of the grooved hoist drums for use on oil rigs. Provided with a groove shape steel segments were simply welded or screwed onto existing steel cable drums. After the 1950 patented manufacturing process by Lebus Inc. this special grooving is called generic synonym as " Lebus groove ".
Areas of application
The multi-layer Seilspulprinzip has since been transferred to continuously with some innovations in other areas of application, wherever steel cables must be wound in long lengths quickly and smoothly in several successive layers ( plies ), for example,
- On cranes and conveyor systems for the construction industry
- For ship loading and discharges on-and offshore
- In mining
- In oceanography
- Ropeways
The multilayer technology with parallel fluting on the drum allows many layers to spool wire ropes in an orderly, exact geometry of each other. The multi-layer coil is made possible by special milled in the drum body rope grooves, which extend parallel to the outboard disc (parallel field ). The Endfüllstücke ensure the correct transition of the rope from layer to layer, and thus the proposed exact Spulgeometrie. (Fig. 1)
Two displaced by depending on the purpose and application about 120 ° to 180 ° intersection areas ensure the necessary pitch per revolution of the drum. (Fig. 2) The pyramid-shaped rope construction in the parallel region ensures a constant and stable winding pattern from the first to the last layer. (Fig. 3)
System Properties
With the parallel groove of rope wear is considerably reduced at Mehrlagenspulung. The load is optimally distributed between the individual layers. Endfüllstücke and the parallel grooving prevents cutting or crushing of the rope. As a result - usually - a factor of 3 to 5 for the life longevity of the steel cable. Thus, the system enables almost unlimited possibilities for coils of wire ropes, regardless of the rope diameter, the cable length and the cable load.
The system made possible by the inclusion of significant viellagiges coil pitches on a relatively small drum dimensions. ( Space saving ) Smaller drums mean less material, cost and weight. By controlled coils the risk of failure of the entire system is reduced, thus preventing costly failures. In addition, the controlled running, almost maintenance free spooling the safety of personnel ensures a high degree.
Forms of delivery
Cable drums with the principle of the multi-layer cable winder through the parallel groove can either be supplied as a complete drums into almost all diameters, or as half-shells which are welded or screwed to existing drums. This solution offers multiple cost advantages, including: For initial smooth drums made parallel ( price and delivery -time benefits ) and can later change of cable diameters can be used with the old drum grooves new again. At the same time with the retrofitting of half-shell cable drums, which have been used in one or two layers, run multiple layers.
Accessories
- Cross threaded spindle,
- Compensator
The multi-layer Seilspulsystem can be in large casserole angles to the cable drum by a cross screw (mechanical) or a compensator ( automatically ) added. In the former, a sprocket drive leads into an endless wave -cut cross thread the rope through a sheave box or a pulley from flange to flange. When a sliding compensator on an eccentric shaft pulley, initiated by the cable, arcuate movement along the winding area is executed.