关于冲击式水轮机的选型设计分析  

Selection Design Analysis of Pelton Turbine

作　　者：邵苏芳 韦俊生 SHAO Su-fang;WEI Jun-sheng(Hangzhou Jianghe Hydro-Electric Science&Technology Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]杭州江河水电科技有限公司,浙江杭州310012

出　　处：《云南水力发电》2022年第4期225-227,共3页Yunnan Water Power

摘　　要：反击式水轮机的最高模型效率较高,但机组在部分负荷运行的效率并不高,而且最低运行负荷需45%以上才能稳定运行。相反,冲击式水轮机特点是能通过调节喷嘴开启的大小和数量,使其一直在接近最优效率条件下运行。它的效率随流量的变化而升降的幅度很小,水轮机平均运行效率较高,在25%~100%出力范围内,最新的转轮能保证效率稳定在91%以上,甚至在0%~120%出力范围内也能正常发电,能更好地利用水力资源。The highest model efficiency of reaction turbine is higher.However,the efficiency of the unit under partial load is not high,and the minimum operating load needs more than 45%to run stably.In contrast,Pelton turbine are characterised by their ability to operate at near optimal efficiency conditions by adjusting the size and number of nozzle openings.Its efficiency increases and decreases slightly with the change of flow rate.The average operating efficiency of the turbine is relatively high.In the output range of 25%to 100%,the latest runner can ensure that the efficiency is stable at over 91%,and can generate electricity normally even in the output range of 0%to 120%,thus making better use of hydraulic resources.

关 键 词：冲击式水轮机 选型 喷嘴 射流直径 转轮直径 转速 调速功 

分 类 号：TV734.1[水利工程—水利水电工程]