摘要
为防止水轮机转轮发生疲劳破坏,探讨转轮应力、位移分布规律。以某抽水蓄能电站水轮机转轮作为研究对象,采用流固耦合方法建立三维数值模型,对不同工况下的水轮机转轮位移及应力等参数开展研究,研究结果表明:水轮机转轮的最大位移发生在飞逸工况下,最小位移往往出现在叶片上冠附近,最大位移通常在下环位置发生;应力分布的最大值往往出现在上冠附近叶片的出水边,该位置是关注转轮疲劳破坏的重点区域,在不增大水头损失、恶化流态的前提下,建议适当增加该区域出水边厚度,提高其刚度;研究结果为抽水蓄能电站水轮机结构设计及安全运行提供了参考依据。
In order to prevent fatigue failure of the turbine runner,the distribution law of the runner stress and displacement is discussed.Taking the turbine runner of a pumped storage power station as the research object,a threedimensional numerical model is established by fluid structure coupling method.The displacement and stress of turbine runner under different working conditions are studied.The results show that the maximum displacement of the turbine runner occurs at runaway condition,the minimum displacement often occurs near the upper crown of the blade,and the maximum displacement usually occurs at the lower ring position;The maximum value of the stress distribution often appears at the outlet edge of the blade near the upper crown,which is the key area to focus on the fatigue damage of the runner.On the premise of not increasing the head loss and deteriorating the flow regime,it is recommended to increase the thickness of the outlet edge of the area appropriately to improve its stiffness;The research results provide a reference for the structural design and safe operation of hydraulic turbines in pumped storage power plants.
作者
苏立
毛成
沈春和
谢文经
戴利传
曾癸森
陈满华
Su Li;Mao Cheng;Shen Chunhe;Xie Wenjing;Dai Lichuan;Zeng Guisen;Chen Manhua(Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,Guizhou;Guizhou Qianneng Enterprise Co.,Ltd,Guiyang 550000,Guizhou)
出处
《陕西水利》
2023年第2期14-16,20,共4页
Shaanxi Water Resources
基金
贵州省科技支撑计划项目(黔科合支撑[2020]2Y042)。
关键词
流固耦合
水轮机
抽水蓄能电站
应力分析
位移分析
Fluid structure coupling
water turbine
pumped storage power station
stress analysis
displacement analysis
