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Axial-flow turbine
Axial-flow turbine
  


  适用水头:H=2m~40m,按其结构可分为定桨式和转桨式两种。定桨式水轮机的叶片固定在转轮体上,叶片安放角不能在运行中改变,效率曲线较陡,适用于负荷变化小或可以用调整机组运行台数来适应负荷变化的电站。转桨式水轮机的转轮叶片一般由装在转轮体内的油压接力器操作,可按水头和负荷变化作相应转动,以保持活动导叶转角和叶片转角间的配合,从而提高平均效率,这类水轮机的上限效率有的已超过94%。


 
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