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江都第一抽水站是我国兴建的第一座大型虹吸式轴流泵站,它设置抽真空系统的目的,是为降低启动扬程。此后兴建的同类泵站,均设置了抽真空系统。80年代初,不少专家发表文章充分肯定抽真空启动降低启动扬程,减少启动振动,在虹吸式轴流泵站有不可或缺的作用。1987年部颁泵站技术规范设计分册中也出现“11.3.1虹吸式出水流道或不具备自流充水的泵站,应设抽真空系统”这样的条文。然而,大型泵站长期运行的实践却证明了抽真空并不能解决虹吸式轴流泵启动振动可能长期不止和降低最大启动扬程这两个问题。
Jiangdu First Pumping Station is the first large-scale siphon-type axial flow pump station built in China. It sets the purpose of vacuuming system to reduce the starting lift. After construction of similar pumping stations, have set up a vacuum system. In the early 1980s, many experts published an article fully affirmed the vacuum start-up to reduce the starting lift, reduce the start-up vibration, in the siphon axial-flow pump station has an indispensable role. In 1987, the ministerial pumping station technical specifications design sub-section also appeared in “11.3.1 Siphon outlet channel or not pumping water pumping stations, should be set vacuum system” such a provision. However, the long-term operation of large pumping stations has proved that vacuum pumping does not solve the problems that the siphon axial-flow pump may start vibrating for a long time and reduce the maximum starting lift.