本文介绍了带弹簧蓄能导水机构自关闭装置的作用、动作原理和特性。通过几台机组运行实践证明,导水机构自关闭,可在机组过速147%N_1情况下,在3秒钟左右时间内实现自关闭动作,避免了蝴蝶阀动水关闭,有效地保护了机组。为取消进口阀门和降低设计飞逸转速的设想提供了参考资料。 This article describes the role of the self-closing device with spring-loaded aquitard, its operating principle and characteristics. Through the operation of several units proved that the water guide mechanism from the closed, the unit over 147% N_1 speed in the case of about 3 seconds to achieve self-closing action, to avoid the butterfly valve water shut down, effectively protecting the unit . To cancel the import valve and reduce the design fledgling speed of the idea provides a reference.