葛洲坝一号船闸输水阀门空化特性原型监测

^Gavitation Characteristics of Filling Valueson Gezhouba No. 1 Lock Prototype

利用原型监测成果分析和介绍了葛洲坝一号船闸反孤形输水阀门空化特性。通过对噪声信号分析，阐述了几种运行方式下阀门底缘空化及顶缝空化特性，首次揭示阀门开启之初底缘和底板之间也可能出现缝隙空化。介绍了空化对门后水流压力和对阀门启门力脉动的影响，分析了空化低频噪声和阀门振动的相互关系。

Cavitatio characteristics of filling values on Geazhouba No. 1 Lock protype is studied. Spectrum analysis technique is used in this paper for the noise data recorded, and much information is drawn including intial and critical state of cavitation, types of cavitation involved, intensity of cavitation, etc. The related phenomena of cavitution and the nature of bottom edge cavitation and top gap cavitation are described. The paper points out that there existed gap cavitation near bottom edge at the beginning of value opening, which was never mentioned before in literatures. In additons, the effect of cavitation on pressure and hoisting load is discoussed. The relation ship between low frequency noises and vibration of hoisting rods is presented at length in this paper.