离心泵气蚀的产生及在设计操作中的措施

Centrifugal Pump Cavitation is Generated with the Measures in the Design Operation

在单机试车和实际操作中,由于各种原因,离心泵往往会发生气蚀现象。为了防止气蚀的发生,通过单机试车所出现的问题结合理论知识,分析在各种使用条件下泵的允许气蚀余量、允许吸上高度分别与有效气蚀余量和吸入管道能量损失之间的关系,利用流体力学知识阐述气蚀产生的条件以及影响气蚀产生的因素,以在设计过程中确定或校核泵的安装高度,并从中提出防止气蚀产生的方法和气蚀产生时设计操作过程中应对的措施。

In the stand-alone test and the actual operation,due to various reasons,centrifugal pumps tend to cavitation phenomenon.In order to prevent the occurrence of cavitation,this paper analyzes the allowable cavitation margin of the pump under various conditions of use through the problems arising from the stand-alone test,and allows the suction height to be equal to the effective erosion allowance and the energy loss of the suction pipe The use of fluid mechanics to explain the conditions of cavitation and the factors that affect the formation of cavitation in the design process to determine or check the pump installation height.And from the proposed method to prevent cavitation and cavitation generated when the design process to deal with the measures.