三峡电厂21F机组高负荷运行时的噪声分析  

Noise Analysis of Unit 21F of Three Gorges Power Plant under High Load Operation

作　　者：孙建平[1] 戴勇峰[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《水电能源科学》2011年第5期117-119,共3页Water Resources and Power

摘　　要：针对三峡电厂21F机组运行时的噪声和振动问题，分别测量和分析了机组的噪声、振动及水压脉动情况。结果表明，涡壳进入门处86．5Hz的噪声来源于导叶相对开度为70％～77％时的流体绕流，与机组振动无关。水车室53．55、35．70、17．85Hz的噪声主要来源于旋转的转轮与水流的相互作用及各叶片通道流体的不均匀。Aiming at the problem of noise and vibration in unit 2iF of Three Gorges power plant, the noise, vibration and water pressure pulsation are measured and analyzed. The results show that the noise frequency 86.5 Hz of the spiral case inlet is caused by the flow around with relative opening of guide vane during 70%-77% while it is not associated with the unit vibration; the noise frequency 53.55 Hz, 35.70 Hz and 17.85 Hz of the waterwheel room are mainly a- roused by the interaction between runner and water flow and the non-uniform flow among turbine blades.

关 键 词：水电机组 高负荷运行 故障诊断 噪声测量 水压脉动 三峡电厂 

分 类 号：TV741[水利工程—水利水电工程] TK730.7[交通运输工程—轮机工程]