ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)

vol 64 / April, 2021

DOI 10.17586/0021-3454-2020-63-3-228-236

UDC 621.165, 616-072.1, 004.932.2

Integrated Endoscopy System for Monitoring Erosion Wear of Steam Turbine Blades

G. A. Shut
Research and Production Association Energorenovatsiya, LLC;

E. I. Puzyrev
Research and Production Association Energorenovatsiya, LLC; General Director

A. V. Vasilieva
ITMO University, Department of Optical-Electronic Devices and Systems; Post-Graduate Student

A. S. Vasiliev
ITMO University ; Postgraduate

I. S. Nekrylov
ITMO University, Saint Petersburg, 197101, Russian Federation; postgraduate

A. K. Akhmerov
ITMO University; Engineer

A. N. Timofeev
ITMO University, Saint Petersburg, 197101, Russian Federation; Senior Researcher, Laboratory Head

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Abstract. The features of video endoscopy system for monitoring working blades of a steam turbine without opening the cylinder body in the operation mode of the turbine unit on a shaft-turning device are considered. The system concept and structural diagram including a flexible and rigid video endoscope, a synchro-sensor and a personal computer, are described. A digital image processing algorithm for calculating blade chords and evaluating the working blades wear dynamics is proposed. The static characteristics of the synchro-sensor are studied using the developed experimental bench simulating the turbine rotor, and the blade chord value is estimated. According to presented experimental data, the error in calculating the blade chord does not exceed 0,2 mm.
Keywords: video endoscopy system, turbine blades, low-pressure cylinder, erosion wear, technical vision



1. Shpenzer G.G., Zakharov A.V., Tyukhtyayev A.M. St. Petersburg Polytechnic University Journal of Engineering Science and Technology, 2014, no. 3(202), pp. 54–61. (in Russ.)

2. Khaimov V.A., ed., Maloraskhodnyye rezhimy TSND turbiny T-250/300-240 (Low-Consumption Modes of the low-Pressure Cylinder of the T-250 / 300-240 Turbine), St. Petersburg, 2007, 240 р. (in Russ.)

3. Povarov O.A., Stanisha B., Ryzhenkov V.A. Thermal Engineering, 1988, no. 4, pp. 66–69. (in Russ.)

4 .Shkotov Yu.D. Energetik, 1990, no. 4, pp. 16–17. (in Russ.)

5. Sevidova E.K., Matsevityy V.M., Kazak I.B., Vakul K.V. Surface Engineering and Applied Electrochemistry, 2007, no. 6, pp. 4–9. (in Russ.)

6. Smyslova M.K., Isanberdin A.N. Vestnik USATU, 2006, no. 1(7), pp. 103–109. (in Russ.)

7. Staniša B., Ivušić V. Wear, 1995, vol. 186, рр. 395–400.

8. Gerber A.G., Sigg R., Völker L., Casey M.V., Sürken N. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2007, no. 6(221), pp. 825–835.

9. Heymann F.J. ASM handbook, 1992, vol. 18, рр. 221.

10. Shubenko A.L., Goloshchapov V.N., Strel'nikov I.S., Reshit'ko I.V. Energy saving. Power engineering. Energy audit, 2014, no. 11(130), pp. 28–39. (in Russ.)

11. Ahmad M., Schatz M., Casey M.V. Wear, 2013, no. 1-2 (303), pp. 83–86.

12. Amelyushkin V.N. Proceedings of the NPO CKTI, 1985, no. 221, pp. 55–58. (in Russ.)

13. Khaimov V.A., Lyapunov V.M., Rubinov A.M., Shelest S.O. Proceedings of the NPO CKTI, 2003,
no. 292, pp. 114–122. (in Russ.)

14. Gavrilov I., Popov V. Journal of Physics: Conference Series, IOP Publishing, 2018, no. 1(1128),
pp. 012122.

15. Khaimov V.A., Kokin V.N., Puzyrev E.I., Voronov E.O., Ganzhin V.A. Power stations, 2006, no. 12,
pp. 32–36. (in Russ.)

16. Endoscope Inspection,

17. Grant B. Steam Turbine Maintenance & Repair Management,

18. Burkhardt G., Parvin A., Fisher J. 6th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, 2007,

19. Dmitriyev A.L. Opticheskiye metody obrabotki informatsii (Optical Information Processing Methods), St. Petersburg, 2005. (in Russ.)

20. Trushkina A.V., Vasilev A.S., Serikova M.G., Anisimov A.G. Automated Visual Inspection and Machine Vision II. International Society for Optics and Photonics, 2017, vol. 10334, рр. 103340G.

21. Leuze electronic, 2019,

22. Otsu N. IEEE transactions on systems, man, and cybernetics, 1979, no. 1(9), pp. 62–66.

23. Gonzalez R.C., Woods R.E. Digital Image Processing, Prentice Hall, 2008, 954 р.