Lifetime and suitability for multi-layer spooling of running wire ropes with plastic coating
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Summary
Plastic-coated wire ropes are characterised by a significantly longer lifetime than conventional wire ropes. In standards, the criteria for changing damaged conventional wire ropes are defined for the design structure of the rope and the rope drive. Coated ropes are not part of these standards. Similar to the standards for determining the discard state, there are no approaches for plastic-coated wire ropes in the theoretical methods for estimating service life. The damage mechanisms occurring during multi-layer spooling and the resulting loading of the drum by plastic-coated ropes are currently the subject of examination. This paper presents the experimental, numerical and analytical studies on the damage behaviour of the wire rope with additional plastic coating for an established rope construction as well as their consideration in an analytical lifetime estimation method and design the rope drive drums. The paper shows that an additional plastic coating of the wire rope generates a considerable increase in lifetime. In practical use, this can significantly increase the economic efficiency of applications.
Author(s): M. Stök, T. Recknagel, M. Wächter, A. Lohrengel, T. Schmidt
