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前言水轮发电机推力轴承是发电机的一个关键部件。它的工作好坏,直接关系到机组的安全运行。随着我国水电事业的发展,单机容量不断扩大,推力轴承所承担的负荷也越来越高,一批平均单位压力高于50公斤/厘米~2的低周速推力轴承相继投入运行。这就给设计、制造和安装提出了更高的要求.推力轴承轴瓦的摩擦面是用巴氏合金铸成的,它的热膨胀系数比钢大一倍。即使在室温下刮出质量很高的瓦面,但由于运行时瓦温升高会使瓦面产生膨胀,尤其是中部的热膨胀现象更为明显。为减少推力轴承轴瓦运行时产生的热变形和机械变形,除了在结构和研刮工艺
Preface Hydrogenerator Thrust bearings are a key component of a generator. Its work is good or bad, is directly related to the safe operation of the unit. With the development of hydropower in our country, the single unit capacity is expanding continuously, and the load on the thrust bearing is getting higher and higher. A batch of low-speed thrust bearing with average unit pressure higher than 50 kg / cm ~ 2 have been put into operation one after another. This places higher demands on the design, manufacture and installation of the thrust bearing bush, which is made of a pasteurized alloy whose coefficient of thermal expansion is double that of steel. Even if the high quality tile is scraped off at room temperature, the tile surface will expand due to the increase of the tile temperature during operation, especially the thermal expansion phenomenon in the center is more obvious. In order to reduce the thermal deformation and mechanical deformation generated when the thrust bearing bush runs, in addition to the structure and scraping process