达县魏家洞水电站水轮机为HL360—WJ—71型其导叶与轴的连接,原设计为键连接。由于导叶与轴长期工作在水里,多年来,因锈蚀及磨损,键与键槽对导叶与轴的紧配合发生松动。在运行情况下,产生以下不良影响:(1)　导叶与轴配合发生松动,在水流的作用下,导叶往返动作,发出异常响?.. The turbine of Weijiandong Hydropower Station of Daxian County is HL360-WJ-71 whose guide vane is connected with the shaft. The original design is key connection. As the guide vane and the shaft work in the water for a long time, due to the corrosion and abrasion, the tight fit of the guide vane and the shaft by the key and the keyway is loosened over the years. Under operating conditions, the following adverse effects occur: (1) The guide vane and the shaft are loosened, and the guide vane moves back and forth under the action of water flow to make an abnormal sound.