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墨西哥齐亚巴斯州贝里萨利奥·多明谷(Belisario Dominguez)水力发电站在中间负荷下运行时碰到了严重的静态振动问题。本文就这一问题的分析和解决作了叙述。安哥斯图拉水电站有时称为贝里萨利奥。多明谷水电站,座落于墨西哥东南格里亚尔瓦河上。该电站装有五台立式混流式水轮机,其水头为91.5米,引用流量185m~3/s,转速128.57转/分,单机额定出力18.4万千瓦。在1975年底该电站开始运行后,发现机组带部分负荷运行时,蜗壳和尾水管内有异常的压力脉动现象。从测量仪表上可看到,这种脉动表现为压力的周期性变化;伴有强烈噪声,噪声的大小有明显的周期性;在某些特殊情况下,因为尾水管水流压力低,而形成的涡带,会引起水轮机用负荷。
Belisario Dominguez Hydroelectric Power Station in Ziabana, Mexico encountered severe static vibration problems while operating at intermediate loads. This article describes the analysis and solution to this problem. Angola’s Tula Hydropower Station is sometimes called Berrizalio. Domingue Hydropower Station, located in the southeastern Gualyva River in Mexico. The station is equipped with five vertical Francis turbine, the head of 91.5 meters, the reference flow 185m ~ 3 / s, speed 128.57 rev / min, stand-alone rated output of 184,000 kilowatts. After the plant started operation in late 1975, it was found that there was abnormal pressure pulsation in the volute and draft tube when the unit was running with partial load. As can be seen from the measuring instruments, this pulsation is manifested as a periodic change of pressure; accompanied by strong noise, the size of the noise has a significant periodicity; in some special cases, due to the low draft pressure of the draft tube, Vortex belt, will cause the turbine load.