CB80-65-125船用冷却泵的改进设计与试验  

Improvement design and experiment study of CB80-65-125 ship cooling pump

作　　者：刘建瑞[1] 王董梅[1] 苏起钦[1] 徐永刚[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《排灌机械》2009年第3期158-162,共5页Drainage and Irrigation Machinery

基　　金：国家科技支撑计划项目(2008BAF34B10)

摘　　要：为了适应船用泵的发展及使用条件,研制开发新型高效船用冷却泵,对CB80-65-125型船用泵进行了技术改造,并采用了FLUENT模拟泵内流场,进行优化改型设计.改进的新型船用冷却泵,叶轮叶片向吸入口前伸并剪薄,减小了进口直径.对改进设计后的泵,用Pro/E建立该泵内部流道的三维物理模型,采用标准k-ε模型、SIMPLEC算法,数值模拟并分析了泵设计工况点下叶轮进口附近流场、静压分布的均匀性及叶轮几何参数对泵性能的影响.试验结果表明,新型船用冷却泵设计合理,流道内流动、静压分布及相对速度的扩散都比较均匀,没有明显的漩涡及边界层分离现象;泵效率达到67.9%,比原型泵效率提高了4.4%;扬程达到20.8 m;结构简单,重量轻.另外,改进设计方法也可提高泵的抗汽蚀性能.A CBS0 -65 -125 ship cooling pump was reformed to improve the limitations of the application conditions. FLUENT software was used to simulate the flow field for the optimization. The new type ship cooling pump was designed with thinner leaf blade with extended inlet, and smaller inlet diameter. The three-dimensional inner flow model was built in Pro/E. A simulation was performed to analyze the flow around the impeller inlet, to study the effects of geometry parameters of impeller on the hydraulic performance at the rated point, by using SIMPLEC algorithm and standard k -8 turbulence model. The experimental results indicate that the static pressure distribution and the relative velocity diffusion are uniform, and there is no obvious swirl and boundary-layer separation. So the design is reasonable. The efficiency of the new type ship cooling pump achieves to 67.9% , 4.4 percent higher than the old one. The head is 20.8 m. The pump is relatively simple in structure and light in weight. Besides, the developed pump can also improve the cavitation resistance of the pump.

关 键 词：船用冷却泵 叶轮 设计 试验 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]