国产轴流转桨式水轮机的叶片密封装置,基本上都采用了五十年代从国外引进的“入”密封圈(简称“入”),其结构如图一所示。全国国产转桨式水轮机的运行情况表明,“入”的泄漏问题是严重的。葛洲坝 The domestically made blades and seals for paddlewheel turbines have basically adopted the “ring-in” seal introduced from abroad in the 1950s (the “inlet”). The structure is shown in Fig.1. The operation of the domestically produced paddle-type turbines shows that the leakage problem of “entering” is serious. Gezhouba