重庆水轮机厂出产的DJ 510—LH—180水轮机,其主轴止水系用空气围带和水封环两套装置。1974年后的产品,取消水封环,改设自流排水。实践证明:空气围带操作麻烦,常易磨破失效,机组运行时无止水作用;水封环只在额定负荷的80％时有效,负荷增加,水量剧增,排水装置起动频繁,常引起水导油盘进水,不仅威胁机组安全,而且一直不能满出力运行。对于旋转中的主轴止水,常用的办法是一排、二堵,以堵为主。无限制地加强排的措 The DJ 510-LH-180 turbine produced by Chongqing Turbine Works has two sets of air shrouds and water seal rings for the main shaft water stop. After 1974 products, cancel the water seal ring, set up gravity drainage. Practice has proved that: air cuff operation troublesome, often easy to wear out failure, the unit running without stop water effect; water seal ring only effective at 80% of the rated load, the load increases, the water surge, frequent start of the drainage device, often caused Water-conducting oil pan water, not only threatened the unit safety, and has been unable to work hard. For rotating spindle water stop, the commonly used approach is a row, two blocking, blocking the main. Unlimited row to strengthen measures