1 基本情况鲇鱼山水库泄洪洞进口检修闸门,在较高的水头下工作,当闸门部分开启时,高速水流将门后的空气带走,形成负压区,负压严重时不仅会引起气蚀,还会使闸门产生剧烈的震动,并会产生较大的吸力,增加启闭力。为此,必须在闸门后设置通气孔,以便输入足够的空气。此外,在进行检修(包括电站机组检修)时,在关闭检修闸门之后放空洞内水流的过程中,亦需要通气孔补气。当检修工作完毕,欲要开启检修闸门,为减小启闭力 1 The basic situation Tanyushan reservoir spillway entrance inspection gate, work under a higher head, when the gate is partially open, the high-speed flow of air will be taken away after the door to form a negative pressure zone, negative pressure will not only cause serious cavitation , But also make the gate produce violent vibration, and will produce greater suction, increase the opening and closing force. For this purpose, vents must be provided behind the gate in order to enter enough air. In addition, ventilation holes are also required during the overhaul (including overhaul of the power station unit) during the process of venting the water inside the cave after the maintenance gate is closed. When the maintenance work is completed, want to open the inspection gate, in order to reduce the opening and closing force