RATIONALIZATION OF THE APPROACHES OF NUMERICAL SIMULATION OF THE GEOMETRICALLY COMPLEX ROTATING EQUIPMENT OF ELECTRICAL STATIONS

Abstract

The basic equipment of the most domestic power units is operated at thermal and nuclear power plants and has exhausted its design resource. Given the lack of funding for the energy sector, it is difficult to re-equip old equipment with new equipment in the near term. It is advisable to ensure a high residual experience of current equipment, based on the study of individual resource performance of specific equipment. The task of estimating the residual resource of power equipment is solved using the methods of computer simulation of separate operating modes. It is clear that taking into account all the features of a full-scale geometric model in mathematical analysis will lead to a significant increase in the human effort and resources of computer and computer engineering. Therefore, the purpose of this research is to rationalize the mathematical model of the rotor cylinder medium pressure steam turbine K-200-130. Two variants of replacement of working blades and bandage fasteners are proposed and investigated. The models are verified on the basis of a comparison of the calculated critical and natural frequencies of the rotors with the data provided by the manufacturers of the given thermal power equipment. The proposed model of rotor with replacement of the working blades with toroidal rings of equivalent length and mass has been successfully verified, and the error of calculation does not exceed 5.5%. Therefore, the rationalization method proposed in this paper can be used to reduce wasted resources in computer modeling of complex rotating equipment.