Development of a technological approach to the control of turbine casings resource for supercritical steam parameters
DOI:
https://doi.org/10.15587/1729-4061.2018.126042Keywords:
, turbine casing, pins, tightening, stressed-strained state, long-term strength, resource controlAbstract
A comprehensive model for evaluation of the resource of HPC of the turbine K-800-240-2, which includes calculation of thermal, stressed-strained state, cyclic and static damageability, is presented here. The numerical studies conducted with the use of modern methods of mathematical modeling showed a high impact of forces of pins’ tightening on the stressed-strained state of the casing elements (the stress level increased by 17.7 %). A technological approach to resource control, aimed at a change in pins’ tightening efforts, was proposed. It was established that this method decreases static damageability of basic metal of casings (by 9.7 %), improving its long-term strength. When taking into account tightening forces, the maximum stress intensity decreased by 9.3 %, while the stress level in the flange joint decreased by 11–41 %. These positive moments are accompanied by an increase in individual resource of the casing by 10 %. The developed concept and recommendations have significant importance for ensuring long-term operation of steam turbines with the initial pressure of hot steam at 24 MPa.
References
- Chernousenko, O. Y., Peshko, V. A. (2016). Influence of the operation of the power units of thermal power plants in the maneuvering mode on the aging rate of power equipment. NTU "KhPI" Bulletin: Power and heat engineering processes and equipment, 10 (1182), 6–16. doi: 10.20998/2078-774x.2016.10.01
- Nazolin, A. L., Polyakov, V. I. (2013). Nadezhnost' elektroenergetiki. Povyshenie zhivuchesti i prodlenie sroka sluzhby turbogeneratorov metodami rezhimnoy optimizacii. Elektricheskie stancii, 10, 8–12.
- Georgievskaya, E. V., Gavrilov, S. N. (2013). Osobennosti prodleniya sroka sluzhby parovyh turbin pri narabotkah, znachitel'no prevyshayushchih parkoviy resurs. Visnyk NTU «KhPI». Seriya: Enerhetychni ta teplotekhnichni protsesy y ustatkuvannia, 12 (986), 107–113.
- Wang, R., Wei, J., Hu, D., Shen, X., Fan, J. (2013). Investigation on experimental load spectrum for high and low cycle combined fatigue test. Propulsion and Power Research, 2 (4), 235–242. doi: 10.1016/j.jppr.2013.11.004
- Bakic, G., Sijacki-Zeravcic, V., Djukic, M., Rajicic, B., Tasic, M. (2014). Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime. Thermal Science, 18, 127–138. doi: 10.2298/tsci121219179b
- Ji, D.-M., Sun, J.-Q., Dui, Y., Ren, J.-X. (2017). The optimization of the start-up scheduling for a 320 MW steam turbine. Energy, 125, 345–355. doi: 10.1016/j.energy.2017.02.139
- Kostyuk, A. G. (2014). Selection of labyrinth seals in steam turbines. Thermal Engineering, 62 (1), 14–18. doi: 10.1134/s0040601515010061
- Naik, D., Kumar, K. (2017). Contact Pressure Analysis of Steam Turbine Casing. International Research Journal of Engineering and Technology, 04 (06), 909–913.
- Zhao, N., Wang, W., Hong, H., Adjei, R. A., Liu, Y. (2016). Mechanical Behavior Study of Steam Turbine Casing Bolts Under In-Service Conditions. Volume 7A: Structures and Dynamics. doi: 10.1115/gt2016-56723
- Grishin, N. N., Gubskiy, A. N., Pal'kov, S. A. (2014). Modelirovanie vliyaniya yavleniy polzuchesti na napryazhenno-deformirovannoe sostoyanie vysokonapryazhennyh elementov parovyh turbin. Visnyk NTU «KhPI». Seriya: Enerhetychni ta teplotekhnichni protsesy y ustatkuvannia, 12 (1055), 98–103.
- Peshko, V., Chernousenko, O., Nikulenkova, T., Nikulenkov, A. (2016). Comprehensive rotor service life study for high & intermediate pressure cylinders of high power steam turbines. Propulsion and Power Research, 5 (4), 302–309. doi: 10.1016/j.jppr.2016.11.008
- Trubilov, M. A., Arsen'ev, G. V., Frolov, V. V. et. al.; Kostyuk, A. G., Frolov, V. V. (Eds.) (1985). Parovye i gazovye turbiny. Moscow: Energoatomizdat, 352.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2018 Olga Chernousenko, Dmitro Rindyuk, Vitaliy Peshko, Vladyslav Goryazhenko
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
