Pugachova T. The improvement of the increasing durability methods and the ways of the renovation of a steam turbine

The object of research is the functioning of a steam turbine rotor on the high parameters of steam. The purpose of research is the determination of a safe exploitation duration of a steam turbine rotor in conditions of a long static and cyclic loadings on the basis of the tense-deformed state analysis. Methods of research are experimental and theoretical calculation analysis based on data of the laboratory research and on the experience of exploitation as well. Novelty is in de-termination of factors which influence greatly a long term and resistance of constructions of high-temperature rotors of steam turbines; for the first time a theoretical calculation analysis of the influence of the rotor constructive parameters on its resistance was made; the adjusted crite-ria of a metal long term strength of rotors on the basis of the analysis of up-to date data about the heat-resistant characteristics of the material and the experience of a long term explotation were proposed; for the first time the analytical connection for the solid-forged rotor coefficient of re-sistance with a limit of creep and long-term strength was established. This allows to predict a condition of a fragile distruction of a material of solid-forged rotors. Degree of intruduction - the department of thermal energetical constructions of TPS and APS of Ukrainian Engineer- peda-gogical Academy, the branch of the CCB "Energoprogress" SLR "Kotloturboprom". Industry of application - energetical mechanical engineering.