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葛洲坝一期工程中的二江水电站是我国目前最大的河床式电站.装有七台转桨式水轮发电机组,其中二台转轮直径为11.3米,容量为17万千瓦(以下简称大机组);另五台转轮直径为10.2米,容量为12.5万千瓦(以下简称小机组).装机容量共96.5万千瓦. 由于大、小机组尾水管扩散段结构及受力特点相同,几何尺寸虽不相同但轮廊相似,故本文主要介绍大机组尾水管扩散段的结构设计.
The Erjiang Hydropower Station in Phase I of Gezhouba Hydropower Station is currently the largest riverbed hydropower plant in China with seven rotary paddle-type turbine units, of which two are 11.3 meters in diameter with a capacity of 170,000 kilowatts (hereinafter referred to as large unit ); The other five runner diameter of 10.2 meters, a capacity of 125,000 kilowatts (hereinafter referred to as small unit.) Installed capacity of a total of 965,000 kilowatts. As large and small units of the diffuser section of the structure and the characteristics of the same force, although the geometric dimensions But not the same but the wheel gallery is similar, so this article mainly introduces the structural design of the large unit draft tube divergence section.