汽蚀是大型给水泵经常出现的问题。在分析给水泵汽蚀的形成机理及大流量工况下出现汽蚀的原因后 ,根据给水泵的基本原理和实际性能曲线 ,创建了新的流量和临界汽蚀余量的数学模型。为了防止大型给水泵发生汽蚀 ,采用在DCS上实现给水泵防汽蚀的控制策略以及监视画面 ,事实表明这是一种有效解决给水泵汽蚀的方法 Cavitation is a common problem with large feed pumps. After analyzing the forming mechanism of feed water pump cavitation and the cause of cavitation under large flow conditions, a new mathematical model of flow rate and critical cavitation margin was established according to the basic principle and actual performance curve of feed water pump. In order to prevent large-scale feed pump cavitation, the use of DCS in the pump to prevent cavitation control strategy and monitoring screen, the fact that this is an effective solution to feed pump cavitation method