带泵板结构顶盖取水技术在巴拉水电站的应用

Application of Water Intake Technology Using Top Cover with Pump Plate Structure in Bala Hydropower Station

顶盖取水技术是将顶盖止漏环与转轮止漏环间不作功的泄漏水引出作为技术供水的水源,将泄漏水变废为宝。通过顶盖取水技术得到的机组技术供水,水质较好,可靠性高,结合巴拉水电站在确定水推力不大于660 t的前提下,通过流体动力学CFD数值模拟技术和解析算法等,研究确定电站顶盖取水结构方案,以提高水轮发电机组技术供水的稳定性及经济性。

The top cover water intake technology is to extract the non-working leakage water between the top cover leakage ring and the runner leakage ring as a source of technical water supply,turning the leakage water into treasure.The technical water supply of the unit obtained through the top cover water intake technology is in good quality and high reliability.Based on the premise that the hydraulic thrust of Bala Hydropower Station is determined not to be greater than 660t,the top cover water intake structure scheme is studied and determined through the fluid dynamics CFD numerical simulation and analytical algorithms,and the stability and economy of technical water supply of the turbine are improved.