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广西壮族自治区田阳县福禄河四级电站装机4×2000kW,水轮机型号HL220-WJ-84,自1994年投入运行后不久发现水轮机内部出现异常响声。被迫停机检查,发现水轮机转轮下迷宫环及后盖板分别出现几条环状的磨损沟痕,并有金属物质烧结在一起的现象。转轮下迷宫环及后盖板经过处理盘车合格后重新开机并网运行,但经过一段时间运行后又出现转轮下迷宫环与后盖板相互磨损现象,严重影响机组运行性能及安全。
Hydropower Station of Tianluo County, Guangxi Province Zhuang Autonomous Region 4 hydropower installed 4 × 2000kW, turbine model HL220-WJ-84, Turbine turbine abnormal noise was found shortly after put into operation in 1994. Was forced to stop checking and found that the labyrinth ring and the rear cover of the turbine runner appeared a few ring-shaped wear groove marks, and the phenomenon of metal material sintering together. The labyrinth ring under the runner and the back cover are re-booted and run on the grid after being qualified. After a period of operation, the labyrinth ring and the back cover under the runner turn to wear out each other, which seriously affects the running performance and safety of the unit.