某电厂真空泵汽蚀异响原因分析及处理方法

Analysis and Treatment of Abnormal Cavitation for Water Ring Vacuum Pump in a Power Plant

某电厂调试过程中,由于凝汽器真空度超过真空泵的极限真空值,导致真空泵产生汽蚀从而造成设备不良振动并产生了极大异响,严重危及设备的长期稳定运行。本文经过对故障现象进行分析查找原因,提出了相应的对策进行改造。改造后真空泵运行时的不良振动和异响得到消除,为同类型水环式真空泵的技术改造提供了可借鉴经验。

During commissioning of the plant,cavitation of the water ring vacuum pump was caused due to the high vacuum degree of the condenser in a power plant with high vibration and noise,which seriously endangered the long-term stable operation of the pumps and plant.After fault phenomenon analyze,corresponding solution was put forward to eliminate the cavitation.It was proved finally that the solution successfully eliminated the vibration and noise,ensured the unit operation reliability and economy.The solution could also be used as good reference for similar problems of other water ring vacuum pumps in different power plants.