Artyukh V. Development of theoretical basis and practice of protection of metallurgical machines from breakdown

The object of the investigation - Iron and steel machines of main and auxiliary cycles (shops). The objective of the dissertation work is to develop theoretical fundamentals of machines protection against failure and develop new shock-absorbing and safeguard devices for iron and steel machinery as well as elimination or drastic reduction of the number of machines failures. The experiments included investigation of mechanical characteristics of elastomers, physical modelling of the protective devices at the Strength of materials laboratory of Priazovskyi state technical university SHEI, as well as investigation of operational capabilities of shock-absorbers and safeguard devices at exploitation conditions at "Ilyich iron and steel works" PSC (Mariupol). The concept of "the quality of machine's field line", connected with the relationship between operational and peak loads, peculiar to a specific machine was introduced and scientifically substantiate for the first time. Also, proposed for the first time and scientifically substantiated were the principles of protection with regard to K-the value of a machine's field line quality. The notion of machine parts "functional strength" was introduced and scientifically substantiated for the first time. The list of the mechanical data for materials of protective devices, required for development of effective shock-absorbers and safeguard appliances was scientifically substantiated for the first time. The concept of efficiency of a safeguard device was first introduced and scientifically substantiated and the conditions for improvement of their efficiency were laid down. The domain of application is machines of the mining and iron and steel complex.