长洲水利枢纽灯泡贯流式发电机结构特点

Structural Features of Bulb Tubular Hydro-generator of Changzhou Hydro-complex

介绍长洲水电站水轮发电机采用水平灯泡式结构布置方式。主轴支撑方式采用两支点双悬臂结构,即在发电机转子下游侧设置一个推力和径向组合轴承,与水轮机径向轴承构成两支点主轴支撑方式。发电机采用双密闭循环强迫通风冷却方式,由轴流风机、空气冷却器、离心水泵和锥形冷却套等组成的二次冷却方式。

The hydro-generators of Changzhou hydro-complex are arranged based on horizontal bulb structure. The main shaft supports are two supporting points and double-cantilever structure, which construct two supporting points and main shaft supporting mode by the radial bearing of turbine and a set of combined thrust and radial bearings set at the downstream side of the generator rotor. The generator adopts double closed loop forced air cooling method; and the secondary cooling system consists of axial flow fan, air cooler, centrifugal pump and conical cooling jacket etc.