摘要
本文针对某离心泵的设计要求,完成了水力模型设计及改进,通过20余个方案的对比,最终得到了泵水力设计最优方案.通过对改进模型的计算表明,改进后,模型能够满足设计要求,设计点效率达到83％以上.完成了空化性能预测,通过对设计流量与最大运行流量的空化性能分析,在最大流量工况时,泵NPSH3为5.6m,满足全流量工况小于7.5m的设计要求.同时,分析了两种流量工况条件下叶轮的径向力特性,为泵的轴承设计提供了力特性参考.
Abstract
This paper focuses on the design requirements of a centrifugal pump and completes the hydraulic model design and improvement.Through the comparison of more than 20 schemes,the optimal hydraulic design scheme for the pump is finally obtained.The calculation of the improved model shows that it can meet the design requirements and achieve a design point efficiency of over 83％.The prediction of cavitation performance has been completed.Through the analysis of cavitation performance at the design flow rate and the maximum operating flow rate,the pump NPSH3 is 5.6m under the maximum flow condition,meeting the design requirement of less than 7.5m under full flow conditions.The radial force characteristics of the impeller under two flow conditions are also analyzed,providing a reference for the force characteristics of pump bearing design.
维普
万方数据