渔子溪电站水轮机转轮叶片泥沙磨损研究

Research on Sediment Wear of Turbine Runner Blades in Yuzixi Hydropower Station

渔子溪系山区河流,泥沙含量大,渔子溪电站水轮机转轮的泥沙磨损严重。本文通过数值计算和试验分析的方法,对渔子溪电站的水轮机进行沙水流动的数值模拟和水轮机转轮叶片的泥沙磨损试验,得到水轮机转轮的泥沙磨损情况,预估出转轮的磨损寿命,并提出抗泥沙磨损的措施。研究结果对优化渔子溪电站水轮机运行策略提供了重要依据,用以指导电站运行管理人员有针对性地回避发生严重磨损的运行工况,以此达到保证机组安全运行、减轻转轮磨损、延长转轮使用寿命、最大程度减少电量损失的目的,同时也对其他多泥沙河流水轮机抗磨研究和运行具有重要的指导意义。

Yuzixi is a mountain river with large sediment content,therefore the sediment wear of the turbine runner in Yuzixi Hydropower Station is very serious.By means of numerical calculation and experimental analysis,the sand-water flow in the turbine blades in this station was numerically simulated,and the sediment wear of turbine blades was tested.The wear conditions of the turbine runner were obtained,the wear life of the runner was estimated,and the anti-wear measures were put forward.The research results provide an important basis for optimizing the turbine operation strategy of Yuzixi Hydropower Station,and can also be used to guide the operation personnel of the power station to avoid the operation conditions with serious wear and tear.In this way,it can ensure the safe operation of the turbine,reduce the wear and tear of the runner,extend its service life and reduce the power loss to the greatest extent.At the same time,it also has important guiding significance for the research and operation of other turbines working in sedimentladen rivers.