本文针对渔子溪一级电站水轮机轴承油质劣化的频繁性和特征,分析了各种典型例证,认为其根本原因是润滑油中进入水分所致。进而提出了改变运行方式和设备技术改造的建议。实践证明:杜绝或减少水分进入水轮机轴承润滑油内的措施有利于延长轴承使用寿命,对确保机组稳定满发运行,提高机组运行利用率和电站经济效益是卓有成效的。 In this paper, according to the frequentness and characteristics of oil deterioration of turbine bearings in Yuzixi Hydropower Station, various typical examples are analyzed. The root cause is the entry of moisture into lubricating oil. And then put forward the suggestion to change the running mode and equipment technical transformation. Practice has proved that: to eliminate or reduce the water into the turbine bearing oil measures will help extend the service life of the bearing, to ensure the unit is stable and full operation, improve unit operation and utilization efficiency and economic efficiency of the plant is fruitful.