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近年来一些大型水轮发电机组相继问世,例如:乌江渡、葛洲坝、白山水电厂的发电机组,这些机组由于单机容量大,转速低等特点,机组转动部份重量重,再加上水推力,推力轴承负荷高达2000～4000吨,这给推力轴承设计、制造和安装带来一系列问题,尽管在设计中采取了一些相应措施,然而机组在试运行阶段都曾发生烧瓦事故,这不仅给安装增加了许多处理工作量,更严重的是拖延了发电时间,影响了供电计划。本文主要对国内近年来投产的大型水轮发电机组推力轴承在设计、制造和安装过程中的问题谈一些看法,供有关人员参考。
In recent years, some large-scale hydro-generating units have come out one after another, for example: Wujiangdu, Gezhouba, Baishan hydropower plant generating units, these units due to single machine capacity, low speed characteristics, the unit weight of some heavy parts, coupled with water thrust, Thrust bearing load up to 2000 ~ 4,000 tons, which give thrust bearing design, manufacture and installation of a series of problems, despite some measures taken in the design, but the unit during the trial operation have occurred in the burning accident, which not only to The installation adds a lot of processing effort and, more seriously, delays the generation time and affects the power plan. This article mainly talks about the problems in the design, manufacture and installation of large-scale hydrogenerator thrust bearing put into operation in China for the reference of relevant personnel.