Abstract: To eliminate the malfunction of the air-release valve in the gate chamber not being able to close or close early when filling the tail water unit section of Changlongshan pumped storage power station, this article briefly analyzes the structure and weight of the floating bucket, as well as calculates the release area and the average release speed of key parts in the valve. By doing so, a transformation method is proposed under existing conditions, which is to increase the diameter of the floating bucket and release hole, and cancel the floating bucket counterweight. After multiple on-site tests, the optimized parameters of the air-release valve have been obtained. Since then, the water filling and air release process of the tailrace gate chamber have become safe and reliable.

Key words:  , pumped storage, tail water unit section, air-release valve, transformation

摘要： 为排除长龙山抽水蓄能电站尾水机组段充水时闸门室排气阀不能关闭或提前关闭的故障，通过分析浮桶结构与重量，计算阀体内关键部位排气面积和平均排气速度，提出现有条件下改造方法，即增大浮桶与排气孔直径并取消浮桶配重。经多次现场试验，得到阀门优化参数，阀门改造后，尾闸室充水排气过程变得安全可靠。

关键词: 抽水蓄能, 尾水机组段, 排气阀, 改造