Obiettivo To carry out full-scale tests on the TU Berlin test beds and comparative practical tests at Thyssen Stahl company.The research project led to the following conclusions which hold general validity:- Today, asbestos-free friction materials which are suitable for use in crane brakes under tough conditions already exist.- However, this conclusion does not apply to every friction material available on the market as the friction characteristics of the individual makes of brake lining vary widely.-It is therefore necessary to verify the suitability of the individual friction lining under the anticipated load conditions before it is used in crane lifting gear.- The test program used in this project provides a reliable basis for this purpose.- The operating measurements conduced on crane lifting gear under practical conditions have helped to make this program even more relevant to the load conditions encountered in practice.- Because of the different properties of the friction materials on the one hand the widely varying practical requirements on the other, no generally valid distinction can be made between 'favourable' and 'less favourable' friction materials.- The choice must be made in the light of the anticipated operating conditions.The results arrived at in this project enable an optimum asbestos-free friction material to be chosen for the cranes used under tough conditions in metallurgical works in such a way as to ensure dependable operation of the lifting gear. In other words, the aim of the research project has been achieved in full.In the past fifteen years, laws have been enacted to prohibit the use of asbestos because this raw material presents a health hazard. This material used to be the principal component of friction linings as it has particularly good properties in respect of thermal loading and mechanical resistance. In recent years, sustained efforts have been made to find substitutes for asbestos. These efforts have now proved successful in the case of brakes for passenger vehicles. However, the operating conditions are different in the case of industrial brakes, making the task more complex.Crane brakes in particular differ from the brakes fitted on private cars because:- the thermal loading and- operating conditionsare different.In the event of an excessive drop in the friction index because of failure of the brake lining, the load suspended from the lifting gear might drop, so presenting a risk of personal injury and material damage.This project centres on the search for suitable asbestos-free friction materials which are able to handle the loads encountered under the tough conditions of crane operation. Programma(i) ECSC-WORKSAFE C - First joint research programme (ECSC) "Safety in the European Coal and Steel Community industries", 1989-1993 Argomento(i) 3.3 - Maintenance Invito a presentare proposte Data not available Meccanismo di finanziamento Data not available Coordinatore Thyssen Stahl AG Contributo UE Nessun dato Indirizzo Kaiser-Wilhelm-Straße 100 47057 Duisburg Germania Mostra sulla mappa Costo totale Nessun dato
