【作者】 谈明高；

【导师】 袁寿其； 刘厚林；

【作者基本信息】 江苏大学 ， 流体机械及工程， 2006， 硕士

【摘要】 泵性能预测就是根据叶轮、蜗壳、导叶等过流部件的几何参数和内部流动特征预测泵的性能，它具有缩短产品研发周期和降低开发设计成本等优点，一直都是泵领域十分重要的研究课题，很多专家学者都对此进行过大量的研究。但到目前为止，泵性能预测的结果还不够精确，不能满足工程实际的需要，国内尚没有实用的泵性能预测软件。因此离心泵性能预测的理论研究及其软件开发具有重要的学术价值和社会经济效益。本文的主要研究内容和成果有： (1) 较系统地总结了国内离心泵性能预测研究的现状，分析比较了水力损失法、流场分析法和神经网络法等几种主要的性能预测方法的优缺点。 (2) 较深入研究和分析了理论扬程公式的推导过程，认为滑移系数是理论扬程计算结果精度的主要决定因素之一。 (3) 比较分析了斯托道拉、威斯奈、普夫莱德尔、斯基克钦等滑移系数公式，研究表明对于离心泵而言威斯奈公式(n_s＜65)和斯基克钦公式(n_s＞65)的计算结果比较准确。首次依据大量优秀水力模型的计算结果和实验结果对这两个公式进行了修正，同时用回归分析分类给出了其修正系数的数学表达式。 (4) 在归纳分析水力效率、容积效率和机械效率的估算公式的基础上，对照实验结果进行了筛选，并给出了使用建议。 (5) 研究比较了各种圆盘摩擦损失的估算公式，认为应根据比转数的范围来选用圆盘摩擦损失的估算公式。根据大量实例修正了圆盘摩擦损失估算公式，并给出了其修正系数的数学表达式。 (6) 分析了水力损失的估算公式，在深入研究各种水力损失的类型的基础上，对各水力损失的表达式进行了修正，并结合实例用回归分析方法给出了其修正系数的数学表达式。 (7) 在Windows平台上和ARX环境下用VC++6.0，对AutoCAD进行二次开发，首次开发成功了工程实用的离心泵性能预测软件。更多还原

【Abstract】 The pump characteristics prediction is such that using the geometry parameters of pump’s components such as impeller, volute, diffuser and the pattern of pump interior flow to evaluate pump’s performance. It can not only shorten the cycle of product research and development but also reduce the cost of the pump design and manufacture. The pump characteristics prediction has been a very important subject in pump field all the time, many experts and researchers have done a lot of study on the subject. But the result is still not accurate enough to satisfy the need of engineering application, and there is still no practical software of the pump characteristics prediction in China. Therefore, it is necessary to have a serious study on the characteristics prediction of centrifugal pumps, which is both of academic meaning and social economy benefits. The main research contents of this paper are below:(1) The present situations and trend on characteristics prediction of centrifugal pumps are summarized. The advantages and disadvantages of several main methods on pump characteristics prediction, such as the hydraulic loss, the flow field analysis and the neural network are compared.(2) The paper researches deeply the demonstration process of pump theoretical head formula and concludes that the precision of theoretical head is determined mainly by slip coefficient.(3) The Stodola, Stechkin, Pfleiderer and Weisner slip coefficient formula are compared, and the research indicates that Weisner(ns<65) and Stechkin(ns>65) are more accurate for centrifugal pump. Based on practical calculation results of many excellent hydraulic model and experiment results, the two formulas of Weisner and and Stechkin are modified, and the coefficients are calculated by regression analysis method.(4) The hydraulic efficiency formula, volume efficiency formula and mechanical efficiency formula are analyzed. According the practical calculation, the suggestions on how to use these formulas are given.(5) The disk friction loss formula are studied and the author concludes that the formula should be chosen by specific speed. The chosen formulas are modified and the coefficients are calculated by regression analysis method.(6) The hydraulic loss evaluation formula are analyzed based on the study of更多还原