泥沙对水轮机过流部件的磨损很大,据有关资料统计,我国仅大中型水轮机受泥沙磨损危害的机组容量已达300万kW。预计到八十年代末受泥沙磨损的机组容量还将增加300万kW。河北省有近1万kW的小型水轮机受到泥 Sediment has a great wear and tear on the over-current components of the turbine. According to relevant statistics, the unit capacity of only large and medium-sized turbines in China that has been damaged by sediment has reached 3 million kW. It is estimated that by the end of 1980s, the unit capacity of sediment to be worn by sand will increase by 3 million kW. Nearly 10,000 kW of small turbines in Hebei Province have been affected by mud