排灌机械工程学报2012，Vol.30Issue(2)：188-191,4.DOI:10.3969/j.issn.1674-8530.2012.02.013
水轮机的磨蚀失效特性
Sand abrasion characteristics of materials for hydro-turbines
摘要
Abstract
To prevent from or relieve sand abrasion of hydro-turbines in hydropower stations on the Yellow River in a more scientific manner, it is necessary to investigate the abrasion characteristics with real sands in that river. The sediment sand in that river bed located at Huayuankou in Zhengzhou was applied into the sand abrasion characteristics measurements of the steels lCrl8Ni9Ti and ZG0Crl6Ni5Mo in the laboratory. The flow conditions were based on the actual situation of flow in Sanmenxia Hydropower Station sited on the Yellow River. The weight loss and its rate against time of these two kinds of materials for hydro-turbine were measured at three sand concentrations, six different water steam velocities. The correlations such as material weight loss to time, steam velocity and sand concentration were obtained through the analyses on the experimental results. Eventually, the mathematical models of sand abrasion characteristics were established by using the regression methods for these two materials. It was shown that weight loss is increased with increasing stream velocity for all the materials, the weight loss rises with increasing sand concentration at a constant velocity, also, the longer the time is lasted in measurements the more the weight loss gets. The obtained regression equations suggest that the material weight loss is approximately proportional to the third power of stream velocity, the first power of both sand concentration and time under those experimental conditions.关键词
水轮机材料/泥沙磨蚀/磨蚀失重量/磨蚀失重率/黄河原型沙Key words
hydraulic turbine material/ sand abrasion/ abrasion weight loss/ abrasion weight loss rate/ sand of Yellow River分类
农业科技引用本文复制引用
任岩,张兰金,李延频,陈德新..水轮机的磨蚀失效特性[J].排灌机械工程学报,2012,30(2):188-191,4.基金项目
水利部948计划技术创新推广转化项目(CT200207) （CT200207）
