中国水利水电科学研究院学报（中英文）2024，Vol.22Issue(5)：491-500,10.DOI:10.13244/j.cnki.jiwhr.20230203
650 MW混流式水轮机转轮应力测试研究
Measurement and research of stress level on runner blade of a 650 MW Francis turbine
摘要
Abstract
Francis turbine has to face variable operation conditions,such as low heads,low loads,frequent start-ups and stops,etc.Fatigue crack on the runner blade may occur and threat the operation safety of prototype tur-bine.The basic principle of stress measurement is introduced in this paper,and key points of measurement location and device arrangement are discussed accordingly.Measurement results of stress level on runner blade of a 650 MW Francis turbine show that,severe stress is detected during start-up of test machine which may lead to fatigue cracks.On specific load ranges,stress level and characteristic strongly relate to the hydraulic stability at these loads,which is one of the limitations for wide-range operation of Francis turbine.To ensure the operation safety and service life of runner,the start-up progress must be improved,and the Francis turbine must operate within the nominal operation ranges at specific heads to reduce the stress level.关键词
混流式水轮机/转轮应力/转轮裂纹/疲劳损害/宽域运行/现场测试Key words
Francis turbine/runner stress/runner crack/fatigue damage/wide-range operation/site measure-ment分类
能源科技引用本文复制引用
李胤,刘绪军,张海库,曹登峰,李贵吉,谭晓霞..650 MW混流式水轮机转轮应力测试研究[J].中国水利水电科学研究院学报（中英文）,2024,22(5):491-500,10.基金项目
中国水科院科研专项(KJ0145C042023) （KJ0145C042023）
