INVESTIGATION OF OSCILLATIONS OF THE CASE OF STEAM TURBINE WITH A CAPACITY OF 500 MW
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2019, Vol 85, Issue
Abstract
Abstract. Problem. The problem of increased vi-bration of bodies of a steam turbine with a capacity of 500 MW is considered. The main cause of the in-creased vibration of the steam turbine is the rotor's unbalance and insufficient stiffness of the system elements. The case of operating practice is consid-ered, where the rotational alignment did not signifi-cantly change the vibration parameters. Goal. The purpose of this work was to simulate the forced os-cillations of the bodies of low-pressure cylinders in the turbine-foundation-base system with a turbine K-500-65 / 3000 KHTZ, as well as to study the caus-es of their increased vibration. Methodology. The research was carried out using the method of oscil-lation, the method of finite elements, as well as au-thor's methods of constructing models and conduct-ing research on oscillations of the turbine-foundation-base system. Results. As a result of the research, a three-dimensional finite-element model of the turbine-foundation-base system was obtained, and the am-plitude-frequency dependences for the points of the cylinder body of low pressure were obtained. The conducted study made it possible to draw conclu-sions about the causes of increased vibration of the upper parts of the bodies of the steam turbine. Originality. The type of developed three-dimensional models of the turbine-foundation-base system is unique. Due to the features of this model, it is possible to study vibration processes at a level that allows you to analyze the vibrations of complex elements of the system. For individual studies, fur-ther specification of the individual parts of the sys-tem is required. This allows us to use the features of the finite element method to specify the turbine-foundation-base system in accordance with the ac-tual operating conditions. By other researchers, using other methods and approaches, the problem was not solved and the causes of the hanging vibra-tion of the cylinder body of low pressure were clari-fied. Practical value. The practical significance of the work performed is an illustrative tool for the development of specialized models for investigating forced oscillations of the turbine-foundation-base system, as well as solving a practical problem in analyzing the causes of increased vibration of indi-vidual complex elements. The results of the work were used to develop measures to improve the vibra-tion state of power units with steam turbines of 500 MW capacity.
Authors and Affiliations
S. Krasnikov
Keywords
Related Articles
- EP ID EP647404
- DOI 10.30977/BUL.2219-5548.2019.85.0.27
- Views 99
- Downloads 0
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