基于刘家峡水电厂#4机组推力轴承过载和长期运行、检修导致机组运行出现隐患等问题,介绍了在推力轴承改造总体结构不变的条件下,利用扩大性大修实施以#4机组推力轴承更换为重点的改造及制定的完备组织和技术措施。结果表明,改造提高了推力轴承承载能力,增强了机组运行的稳定性、可靠性。 Based on the overload and long-term operation of thrust bearing in # 4 unit of Liujiaxia Hydropower Plant and the hidden troubles caused by the overhaul of the unit, the paper introduced the replacement of the thrust bearing with # 4 unit by means of enlarged overhaul under the condition that the overall structure of the thrust bearing was unchanged. Focus on the reform and development of a comprehensive organization and technical measures. The results show that the improvement improves the bearing capacity of thrust bearings and enhances the stability and reliability of the unit operation.