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转轮裂纹问题严重危害到了水轮机运行效率和使用寿命,动应力是导致裂纹的重要原因,展开水轮机转轮动应力分布规律和成因机理研究,可为水电机组安全、高效运行提供技术指导,具有重要的科学与现实意义。本文从理论计算、数值模拟和测量技术三个方面,综述了国内外水轮机转轮动应力的研究方法,列举了典型的国内外研究案例,分析了各研究方法特点,对动应力研究方法的发展方向做出了展望,总结了转轮裂纹的大致原因,从设计制造和运行等方面给出了转轮的防裂建议。
The runner crack problem seriously jeopardizes the running efficiency and service life of the turbine. Dynamic stress is an important cause of the crack. Studying on the dynamic stress distribution and mechanism of the runner can provide technical guidance for the safe and efficient operation of the hydroelectric generator. It is important The scientific and practical significance. In this paper, the research methods of dynamic stress at hydraulic turbine runner at home and abroad are summarized from three aspects of theoretical calculation, numerical simulation and measurement technology. The typical domestic and international research cases are listed, the characteristics of each research method are analyzed, and the development of dynamic stress research method The direction has made the forecast, sums up the general reason of the runner crack, has given the anti-crack proposal of the runner from the aspects of design, manufacture and operation.