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随着我国水电事业的迅速发展,水轮机制造也迅速的发展起来,基本上满足了水电建设的需要,取得了很大成绩。但是,水轮机的汽蚀问题一直比较严重,有的新机投入运行后,往往运行不到5000—8000小时就不得不对汽蚀进行检修处理,有的运行不到两年,转轮叶片就发生缺口和穿孔。如三道河、天堂、塘家坝及白莲河等电站,汽蚀破坏愈来愈严重。又如盐锅峡电站,由于磨损和汽蚀,十五年来仅不锈钢焊条就已耗用24.6吨,每年因停机检修损失的电能约一亿度,还不包括水轮机的效率下降所引起的电能损失。由于汽蚀引起的水轮机频繁检修,不仅耗费了大量的人力物力,还缩短了机组
With the rapid development of hydropower in our country, the manufacture of hydro-turbine has also been rapidly developed, basically meeting the needs of hydropower construction and great achievements have been made. However, the problem of cavitation of hydraulic turbines has been rather serious. After some new machines are put into operation, cavities have to be overhauled for less than 5000-8000 hours, and some have run for less than two years, causing gaps in runner blades And perforated. Such as the three rivers, paradise, Tangjiaba and Bailianhe power station, cavitation damage more and more serious. Another example is the Yanghua Gorge power station, due to wear and cavitation, only 15 years, stainless steel electrodes have consumed 24.6 tons of annual maintenance due to downtime about 100 million kilowatts, not including the efficiency of the hydraulic turbine caused by the loss of power loss . As cavitation caused frequent maintenance turbine, not only spent a lot of manpower and resources, but also shorten the unit