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传统的水轮机通常在蜗壳进口处装设蝴蝶阀或球形阀,以便用于机组检修和飞逸时的动水关闭。最近几年,东方电机股份有限公司购买了加拿大多米宁公司的专利自行设计了一种结构全新的圆筒阀并用于漫湾电站250MW机组,不仅填补了国内空白,而且达到了世界先进水平。 圆筒阀主要由筒体、操作机构、同步机构、行程指示装置等组成。停机时筒体插入座环固定导叶与导水机构活动导叶之间,从而将水流截断。其优点是:①成本低,是蝶阀的1/3～1/2,是球阀的1/4;②密封好,水力损失小,效率高;③操作方便、
Conventional turbines are usually fitted with butterfly or globe valves at the volute inlet for shut-off of the hydrodynamic when overhauling and flying. In recent years, the Dongfang Electrical Machinery Co., Ltd. purchased a Canadian company Domino’s own design a new cylinder valve structure and used in Manwan 250MW unit, not only to fill the gap, but also reached the world advanced level. Cylinder valve mainly by the cylinder, operating mechanism, synchronization agencies, travel instructions and other components. When the machine is stopped, the cylinder is inserted between the fixed vanes of the seat ring and the movable guide vane of the guide mechanism to cut off the water flow. The advantages are: ① low cost, is the butterfly valve 1/3 ~ 1/2, is the ball valve 1/4; ② sealed, hydraulic loss, high efficiency; ③ easy to operate,