汽蚀现象

电站调节阀汽蚀现象的分析与研究

Analysis and research on cavitation of control valve for power station

水泵叶轮汽蚀现象浅谈

Thoughts on the Phenomenon of Vapor Loses on Water Pump Impeller

水泵汽蚀现象初探

First research on phenomenon of water pump corroded by vapour

这就是所谓汽蚀现象的根据。

This is the basis of the phenomenon called cavitation .

上述这一过程称为汽蚀现象。

The phenomenon of this process is called cavitation .

在小水电站和泵站中，水流道内汽蚀现象普遍。

Little Tom There are many phenomenons that cavitate in water and electrical station .

长期以来，泵汽蚀现象被认为是一个不易解决的问题。

For a long time , the pump cavitation has been regarding as a difficult problem to be resolved .

分析了水泵汽蚀现象产生的原因及水泵汽蚀现象的危害，并提出了防止和减轻汽蚀的几点意见。

This paper analyzes the causes and harm of water pump cavitation , and puts forward several measures to prevent and lessen cavitation .

介绍了水泵汽蚀现象、危害及影响因素，对水泵汽蚀防护的各种措施进行了阐述。

This paper introduced the phenomenon of water pump cavitation and its hazards , then it expounded all kind measures for preventing cavitation .

在此基础上给出了计算水泵安装高度的计算公式，利用该公式可有效地防止汽蚀现象的产生。

Based on this , water pump installing hei ght 's formula is presented , using it can effectively prevent vapor erosion 's producing .

汽蚀现象是离心泵运行中常见的损害，汽蚀对泵的安全、经济的运行均有破坏性作用。

Cavitation phenomenon is centrifugal pump operation of common fault , for the safety of the pump cavitation , economic operation are destructive role .

分析结果表明，启动过程中的汽蚀现象使混流泵瞬态性能迅速下降，汽蚀性能与流量、转速、叶轮参数等有密切关系。

The analysis results indicate that the transient performance of pump during starting period decreases evidently under cavitation condition ; cavitation performance of the pump has close relationship with flowrate , rotational speed and impeller parameters .

汽蚀现象改变了流道内的速度分布，使离心泵的效率下降、扬程降低，引起机器振动，同时也会使叶轮遭受破坏，严重影响工作性能，并妨碍其正常运行。

Cavitation changes the velocity distribution of the flow channel , so that the efficiency of centrifugal pump down , head lower , causing machine vibration , but also will damage the impeller , seriously affecting the performance and prevent proper operation .

通过对离心泵汽蚀现象的分析和改善离心泵抗汽蚀性能的几个方案的比较，在不影响正常生产的前提下，解决机泵的汽蚀问题，应首选在其入口加装诱导轮。

Based on the analysis of the cavitation occurred in centrifugal pump and the comparison of several methods to remove the phenomenon , it was concluded that the installation of the inducer at the inlet is the best method which would not affect the normal production .

认为在选择阀门时应考虑阀门的流通能力、流量特性、阀体种类、阀门执行器等因素，并避免出现汽蚀和闪蒸现象；

Holds that negotiability , flow characteristics , valve type , valve actuator should be considered and cavitation and flashing be avoided when selecting control valves .

在泵运行过程中，若在汽蚀的初生阶段就能及时发现汽蚀现象，则可以采取一些有效措施，以减少汽蚀对泵的冲蚀破坏，延长泵的使用寿命。

If cavitation can be detected in its early period during the pumping stations works , effective measures can be taken to reduce the cavitation breakage and prolong the life-span of pumping stations .

本文通过泵吸入过程能量方程的分析，导出了汽蚀监界转速的计算公式，为防止汽蚀现象与确定泵的最佳运行转速提供了理论依据。

In this paper , by analysis of energy equation sucking-produces , computation methods of critical rotative velocity of cavitation was deduced , the theoretical criterion for preventing the cavity phenomenon and determining fine running rotative velocity of pumps was provided from the computation formula .