DEVELOPMENT OF MATHEMATICAL MODELS OF A WORKING BLADE OF A STEAM TURBINE K-1000-60/3000 WITH THE AIM OF PREDICTING RESIDUAL LIFE

V.M. Torop, Dr Sc. (Eng.), G. Yu Saprykina, Cand. Sc. (Eng.),
Paton Institute of Electric Welding, NAS of Ukraine, 11 Malevich St, Kyiv, 03680, Ukraine, e-mail: gala_sapr@ukr.net),
Yu. S. Vorobyov, Dr Sc. (Eng.),
Kharkov National Technical University KhPI,  2, Kirpichov St, Kharkiv, 61002, Ukraine

Èlektron. model. 2018, 40(4):83-94
https://doi.org/10.15407/emodel.40.04.083

ABSTRACT

The results of investigations of the causes of fracturing in the last stage of steam turbines K-1000-60/3000, used at NPPs of Ukraine, are presented. A complex of studies on the structure, chemical composition and mechanical properties of the blade material has been carried out. Morphological and factographic investigations of the crack surface have been performed. The finite-element model of the fifth-degree workbench has been constructed. Modeling of its loading in the conditions of operation has been carried out. The causes of defects are mentioned. A possi- bility of forecasting  the remaining resource of blades is shown.

KEYWORDS

working blades of steam turbines, finite element model, simulation of load, geo- metric model of blade of steam turbine, forecasting of residual resource.

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