水轮机活动导叶泥沙磨损试验研究  

Experimental Research on Silt Abrasive Erosion of the Movable Guide Blade of Hydraulic Turbine

作　　者：鲁思阳 袁帅 曾永忠[1] 杜海 田文文 刘小兵[1] LU Si-yang;YUAN Shuai;ZENG Yong-zhong;DU Hai;TIAN Wen-wen;LIU Xiao-bing(Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学流体及动力机械教育部重点实验室

出　　处：《中国农村水利水电》2019年第8期192-196,203,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51279172);四川省流体机械重点实验室开放研究基金资助项目(szjj2016-002);西华大学研究生创新基金(ycjj2018192)

摘　　要：为预估新疆某在建的高水头、多泥沙电站水轮机活动导叶的泥沙磨损状况,为水轮机过流部件选材及防护方案的制订提供翔实的数据,借助水轮机CFD的全流场计算结果,提出一种基于流场相似的绕流式的试验方法,研究了水轮机活动导叶的泥沙磨损部位分布规律。根据该电站的过机泥沙及过流部件流场,对相应泥沙含量和过流条件下过流部件两种备选材料(ZG0Cr13Ni4Mo、ZG06Cr13Ni5Mo)进行了试验。通过试验研究获得了该水轮机在典型小流量工况下、一定含沙浓度条件下试件表面的磨损深度,并采用非线性拟合方法率定出两种材料在小流量工况下的磨损率公式。结果表明ZG0Cr13Ni4Mo材料比ZG06Cr13Ni5Mo材料的抗磨性能略优,并通过所得磨损率公式对电站在不同工况下运行两年的活动导叶磨损量进行了预估,为电站水轮机过流部件设计的提供参考。In order to predict the abrasion condition of the movable guide vane of a hydropower station in Xinjiang and provide data to support the selection of the hydraulic turbine material and protection plan,a flow test method is proposed in this paper,and the experimental study is made of the location and the rule of the abrasion of the movable guide vane.According to the running condition of the power plant,the behavior and characteristic to sediment erosion of two materials(ZG0Cr13Ni4Mo and ZG06Cr13Ni5Mo)are studied.The erosion depth of the turbine under a typical small flow rate and a certain concentration of sand are obtained through experimental research.The erosion rate formula of different materials under small flow rate is obtained by nonlinear fitting analysis method.The results show that the erosion resistance of the material ZG0Cr13Ni4Mo is better than that of material ZG06Cr13Ni5Mo,and the erosion volume of the movable guide vane of the power plant under different conditions is estimated by the erosion rate formula from the experiment.

关 键 词：泥沙磨损 绕流式 磨损率 磨损预估 

分 类 号：TV136.1[水利工程—水力学及河流动力学] TG174.44[金属学及工艺—金属表面处理]