大朝山水轮机转轮动应力试验研究

开展真机转轮叶片动应力试验研究是解决大型水轮机转轮开裂的关键.对大朝山水电厂6#机组水轮机转轮动应力进行全面的试验研究,分别对机组变转速、变电压和变负荷等稳定工况以及开停机、升降负荷、甩负荷、筒阀动水关闭等瞬变工况下转轮叶片静动应力和振动进行了测量,获得了大量第一手宝贵的试验数据,对真机转轮静动应力的变化规律进行了深入分析与探讨.研究成果对进一步揭示大型水轮机转轮的开裂原因和深入开展混流式水轮机的可靠性研究具有重要意义.图7参3

Testing Research of Dynamic Stress of Hydraulic Runner for Dacaoshan Power Station

Testing research of dynamic stress in turbine blade is the key for solving the crack of runners.The authors completed the testing and research of runners dynamic stress on dacaoshan unit 6#in different running speed,electric voltage and load condition,the transient stress of runner was also measured in starting up,shutting down,load rejection and the cylinder valve closing condition.Large quantity precious testing data were acquired,the authors has analysed the property of the static and dynamic stress of runner deeply.The research results has large significance to announce the cracking reason of hydro turbine runners and to research the reliability of Francis turbine.