水轮机顶盖水位升高原因及处理办法

文章论述了龙羊峡水电厂４台ＨＬＤ０６Ａ－ＬＪ－６００水轮机顶盖漏水的原因。顶盖水位升高有以下两个方面的原因：１．主轴密封漏水，水轮机主轴密封漏水因密封水压偏低造成，提高密封水压后即可解决此问题。２．导叶套筒漏水，导叶套筒漏水的主要原因是“Ｕ”型密封圈老化翻边、磨损，上、中轴套间隙增大而致，通过更换“Ｕ”型密封圈及导叶套筒材料，增加密封装置即可。

Analysis on rising water level above the head cover of the turbines

In the paper the cause of rising water level above the head cover of the turbines in Longyangxia hydropower plant is analyzed.The conclusion from analysis is that the leakage of the main shaft seal and the sleeve of the guide blade result in the rising water level above the head cover.In end some technological measurements are also given.