Suspension Means - Equalizing Loads to Extend Their Service Life

摘要

In recent years, increasing problems have been identified with excessive wear of the suspension means on lifts, particularly on MRL systems. The causes are numerous, but the load distribution within the rope set is of great importance. According to Prof. Feyrer's well-known studies at the University of Stuttgart, the life of the entire rope set can be reduced by up to 40%, if one rope only deviates by 15% from average value of all the rope loads in the set. By utilizing a long known physical principle, a device for permanent installation has been developed with which the rope loads can be compensated optimally without external energy supply (even during the lift's travel) in new and existing installations. This paper will deal with the operating principle, the chosen design and the results at selected elevators.