Abstract
Control valves are actuating elements of a steam turbine control system; the quality of their performance directly affects the reliability of the overall steam turbine unit. Accordingly, these valves must meet very stringent requirements. Among the factors and characteristics responsible for the quality of control valves, an important place is occupied by the design simplicity, manufacturability, serviceability, ease of installation, high operating reliability, low hydraulic resistance, low dynamic loads acting on the valve stem, and moderate noise level. At the same time, it should be noted that there is quite a large fleet of old, obsolete steam turbine power units at present in Russia with valves featuring both high hydraulic resistance and poor reliability. In new, linear control valves developed in the last decade, almost all design possibilities for their improvement have been exhausted. Hence, rotary control valves may be of great interest for practice. It is this type of valve that is considered below. This information includes a description of valve design, results from the investigation of flow parameters in the valve flow path, and the flow characteristic obtained by a mathematical simulation technique. This valve meets the above-mentioned requirements to the maximum extent, is fully balanced of axial thrust, has almost zero steam leakage along the drive stem, and is operated with low-power actuators with any bores and any initial steam pressures.
Similar content being viewed by others
REFERENCES
A. E. Zaryankin and B. P. Simonov, Control and Combined Stop and Control Valves of Steam Turbines (Mosk. Energ. Inst., Moscow, 2005) [in Russian].
A. E. Zaryankin, V. A. Zaryankin, V. A. Seregin, E. Yu. Grigor’ev, and A. N. Rogalev, “Next-generation unloaded throttle control valves for steam turbines,” Vestn. Ivanov. Energ. Univ., No. 6, 11–17 (2014).
A. I. Babaev, “Analysis of modern designs of combined stop and control valves of steam turbines,” Probl. Mashinostr. 20 (1), 11–16 (2017).
D. R. Nosul’ko and D. V. Peretatko, “Mastering and improving the system of regulation, steam distribution and protection of 800 MW power units of Zaporozhye state district power plant,” Elektr. Stn., No. 1, 24–27 (1984).
A. G. Kostyuk, A. I. Kumenko, A. N. Nekrasov, S. V. Kalinin, and S. V. Medvedev, “An experimental analysis of pressure pulsations in the steam admission elements of a turbine installation,” Therm. Eng. 47, 529–537 (2000).
V. F. Kasilov, S. V. Kalinin, and V. M. Gvozdev, “A study of the vibrational activity of the control valves in the steam admission system of the HP cylinder in a K-200-130 steam turbine,” Therm. Eng. 48, 890–898 (2001).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by T. Krasnoshchekova
Rights and permissions
About this article
Cite this article
Zaryankin, A.E., Zaryankin, V.A., Akatov, A.S. et al. Development and Investigation of a New Rotary Valve for Power Steam Turbines. Therm. Eng. 67, 249–255 (2020). https://doi.org/10.1134/S0040601520050109
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0040601520050109