水电工程过流部件柔性涂层材料泥沙磨损及抗磨能力研究

Research on the Sand Wear and Wear Resistance of Flexible Coating Materials for Flow Parts of Hydropower Project

水电工程尤其是水电站水轮机过流部件在含沙水中的泥沙磨损是很普遍的问题,严重时会导致过流部件的破坏,水电站不得不停机检修和维护,造成巨大的经济损失。对研制的柔性抗磨材料涂层应用在水电工程中的管道和水轮机导叶试件的泥沙磨损进行了试验研究,结果表明本柔性抗磨涂层材料的泥沙磨损比常用抗磨不锈钢材质小的多,大大提高了水电工程过流部件的抗磨能力。并结合过流部件表面速度测试结果,建立了水电工程过流部件泥沙磨损预估数学模型,为类似水电工程过流部件的泥沙磨损提供了预估方法,也为水电工程尤其是水电站的运行检修维护提供了技术支撑。

It is a common problem for hydropower projects,especially for turbine flow parts of hydropower stations,to wear out the sediment in the sandy water,which will lead to the damage of the flow parts,and the hydropower stations have to shut down for repair and mainte⁃nance,resulting in huge economic losses.In this paper,the sand wear of pipeline and turbine guide vane specimens developed by the flexi⁃ble anti-wear material coating is studied.The research findings show that the sand wear of flexible wear-resistant material coatings is much smaller than that of ordinary wear-resistant stainless steel materials,greatly improving the wear resistance of flow components in hydropower engineering.Combined with the test results of the surface velocity of the passing parts,this paper establishes a mathematical model of sediment wear prediction for the overcurrent parts of hydropower projects,which provides a prediction method for sediment wear of similar overcurrent parts of hydropower projects,and also provides technical support for the operation,overhaul and maintenance of hydropower projects,especially hydropower stations.