摘要
通过对某高能量单级悬臂式离心泵(OH2)振动偏大问题进行根本原因分析,排除了轴系刚度、叶轮水力精度等可能导致振动偏大的可能性,确认来自泵内流固耦合冲击(Fluid-structure Interaction)引发的水力激振是泵振动偏大的根本原因,通过一系列运转试验及数值计算分析,证明当隔舌间隙较小时,适度增大隔舌间隙可以使泵振动减小,但当隔舌间隙增大到一定限度后,如再继续增大隔舌间隙,泵振动值将不降反增。
With the analysis for the causes of rather serious vibration occurred in high energy single stage cantilever centrifugal pump(OH2),the possibilities that the vibration was resulted from weak shaft stiffness or hydraulic imprecision of the impellers were removed.It was concluded that the shock excitation due to fluid-structure interaction is the radical cause of the vibration in the pump.With a serious of tests and numerical calculations,it has been proved that appropriate increase of the clearance between cutwater and impeller blade can decrease the vibration;but when the clearance increases is out of some extent the vibration may increase not decrease.
作者
张翼飞
梅剑
杨悦来
Zhang Yifei;Mei Jian;Yang Yuelai(Jiangsu Shuangda Pumps Co.,Ltd,Jingjiang 214537,China)
出处
《化工设备与管道》
CAS
北大核心
2021年第3期54-61,共8页
Process Equipment & Piping
关键词
高能量
离心泵
流固耦合
水力激振
振动
high energy
centrifugal pump
fluid-structure interaction
hydraulic excitation
vibration
