| 双流道泵叶轮切割定律方程的建立与试验 |
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| 引用本文： | 张德胜,王川,施卫东,潘大志,张光建.双流道泵叶轮切割定律方程的建立与试验[J].农业机械学报,2014,45(1):73-78. |
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| 作者姓名： | 张德胜 王川 施卫东 潘大志 张光建 |
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| 作者单位： | 江苏大学;江苏大学;江苏大学;江苏大学;江苏大学 |
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| 基金项目： | “十二五”国家科技支撑计划资助项目（2011BAF14B01、2012BAB17B02-4）、江苏省科技成果转化专项资金资助项目（BA2011126）、江苏大学高级人才启动基金资助项目（11JDG038）、安徽省科技攻关资助项目（12070203019）和江苏高校优势学科建设工程资助项目 |
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| 摘 要： | 为了找出适用于双流道泵叶轮的切割定律,选用比转数为77和122的两种双流道泵,分别对其叶轮进行了5次切割,并进行了泵外特性试验。通过分析双流道泵在最优工况及关死点工况下性能参数与叶轮直径的变化规律,确定了相应的切割指数取值范围,最终建立了双流道泵叶轮的切割定律指数方程。研究结果表明,双流道泵的流量、扬程、轴功率和效率随叶轮直径的减小而降低,但随叶轮切割百分比的增加,最优工况性能参数的变化规律及下降幅度并不相同,关死点扬程和轴功率随叶轮直径的减小下降明显;双流道泵关死工况点的切割指数可以近似认为与比转数的变化无关;最优工况和一般工况点的流量切割指数随比转数的变化较明显。建立的双流道泵叶轮切割定律预测值与试验值吻合性好。
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| 关 键 词： | 双流道泵 叶轮 性能曲线 切割定律 |
| 收稿时间： | 1/8/2013 12:00:00 AM |
Establishment and Experiment of Impeller Cutting Law of Double Channel Pump |
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| Zhang Desheng,Wang Chuan,Shi Weidong,Pan Dazhi and Zhang Guangjian.Establishment and Experiment of Impeller Cutting Law of Double Channel Pump[J].Transactions of the Chinese Society of Agricultural Machinery,2014,45(1):73-78. |
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| Authors: | Zhang Desheng Wang Chuan Shi Weidong Pan Dazhi and Zhang Guangjian |
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| Institution: | Jiangsu University;Jiangsu University;Jiangsu University;Jiangsu University;Jiangsu University |
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| Abstract: | In order to put forward the impeller cutting law of double channel pump, two kinds of double channel pumps with the specific speed of 77 and 122 were selected as research objects. The impeller was cut as five times respectively and the performance experiments of double channel pumps were conducted. By investigating the change law between the performance parameters and the impeller diameter at optimal point and dead point, the corresponding value range and equation of cutting index were obtained. Results show that the flow rate, head, shaft power and efficiency reduce with the decrease of the impeller diameter. However, as the increase of impeller cutting percentage, the change law and the reducing amplitude of performance parameters at optimal point are different, and head and shaft power obviously decrease with the decreasing of the impeller diameter at dead point. The cutting index number of double channel pump at dead point can be viewed independent of the specific speed while the change of the cutting index number is obvious with the change of the specific speed at the optimum and common points. The predicted value of the cutting law according to the impeller cutting law established agrees with the experimental value well. |
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| Keywords: | Double channel pump Impeller Performance curves Cutting law |
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