Proceedings of the 2024 7th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2024)

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Analysis and Treatment of Cracks in the Francis Turbine Runner of a Hydropower Station

Authors
Jia He1, *
1Datang Yunnan Power Generation Co., Ltd., Kunming, Yunnan, 650103, China
*Corresponding author. Email: 624419071@qq.com
Corresponding Author
Jia He
Available Online 31 January 2025.
DOI
10.2991/978-94-6463-650-5_14How to use a DOI?
Keywords
Water turbine cracks; Convergence; Strength; Resonance; Operating conditions; Welding technology
Abstract

This paper presents a statistical analysis of the occurrence of cracks in the runner of mixed-flow turbine in three units of a factory over a continuous period of five years. Due to the complex shape of the blade outlet connection resulting from welding processing and the high residual stress after welding, this area is prone to cracking. Most cracks show a trend of convergence after treatment, but some cracks do not converge after repair welding. This paper conducts a comprehensive analysis of various factors such as runner design, operating conditions, and repair processing techniques, and finds that welding processes and operating conditions have a significant impact on crack formation. To address the issue of repeated crack occurrence, this paper incorporates requirements for the operable area of the runner into the operating regulations and strictly controls the on-site welding process of the runner, focusing on quality control in every step such as preheating, stress relief, insulation, and linear grinding. Ultimately, the problem of repeated crack occurrence in the runner is successfully resolved, achieving effective control over runner cracks.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2024 7th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2024)
Series
Advances in Engineering Research
Publication Date
31 January 2025
ISBN
978-94-6463-650-5
ISSN
2352-5401
DOI
10.2991/978-94-6463-650-5_14How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Jia He
PY  - 2025
DA  - 2025/01/31
TI  - Analysis and Treatment of Cracks in the Francis Turbine Runner of a Hydropower Station
BT  - Proceedings of the 2024 7th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2024)
PB  - Atlantis Press
SP  - 133
EP  - 146
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-650-5_14
DO  - 10.2991/978-94-6463-650-5_14
ID  - He2025
ER  -