关键词: 水电厂, 弹性油箱, 渗漏分析, 处理

Abstract: Leakage of the elastic tank occurs during operation of Unit 2 of a hydropower station. Its excessive compression can not meet the operation requirements. Owing to the internal pressure reduction, the end part of the elastic oil tank changes into rigid contact with internal support as lose of cushioning effect. In the unit operation, the vertical impact force is transferred to the upper frame, which causes excessive vertical vibration of the upper frame and results in serious damage to unit parts. Improvement of the seal of the flexible tank is implemented. As well, the assembly of one-way valve is renovated by use of Italian professional one-way valve. Further, the second plug sealing is added. By these treatment, the 880 t and 950 t load pressure test proved the qualification of the elastic oil tank and it meets all the requirements in operation.

Key words: hydropower station, elastic tank, seepage analysis, treatment