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| 低扬程泵变速工况性能及合理变速范围的确定 | |
| 引用本文： | 张仁田,程吉林,朱红耕,姚林碧,张礼华.低扬程泵变速工况性能及合理变速范围的确定[J].农业机械学报,2009,40(4):78-81. |
| 作者姓名： | 张仁田 程吉林 朱红耕 姚林碧 张礼华 |
| 作者单位： | 1. 扬州大学水利科学与工程学院,扬州,225009;江苏省水利勘测设计研究院有限公司,扬州,225009 2. 扬州大学水利科学与工程学院,扬州,225009 3. 江苏省水利勘测设计研究院有限公司,扬州,225009 |
| 基金项目： | 国家科技支撑计划重大项目，水利部948资助项目 |
| 摘 要： | 根据南水北调工程中低扬程泵站采用变速运行的具体特点,研究了变速工况下泵装置性能的变化规律,指出在装置净扬程大于零的情况下,传统的水泵相似律不再适用于变速工况下的装置特性换算,提出了采用泵特性线性化和额定转速下装置特性预测变速工况下性能参数的方法.在引入"能耗比"的概念后,对一定时间段调水量恒定条件下的变速运行与其他调节方式的能耗进行了分析.在考虑变速装置效率、电动机效率和不同转速下泵效率变化下能耗比与净扬程关系的基础上,提出了确定不同净扬程下经济合理变速范围的方法. |
| 关 键 词： | 泵 性能预测 变速运行 变速范围 能耗比 |
Low-Performances and Determination of Reasonable Scope for Variable Speed Operation |
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| Zhang Rentian,Cheng Jilin,Zhu Honggeng,Yao Linbi,Zhang Lihua.Low-Performances and Determination of Reasonable Scope for Variable Speed Operation[J].Transactions of the Chinese Society of Agricultural Machinery,2009,40(4):78-81. | |
| Authors: | Zhang Rentian Cheng Jilin Zhu Honggeng Yao Linbi Zhang Lihua |
| Institution: | 1.College of Hydraulic Science and Engineering;Yangzhou University;Yangzhou 225009;China 2.Jiangsu Surveying and Design Institute of Water Resources Co.;Ltd.;China |
| Abstract: | According to the special operation conditions of low-head pumping stations with variable speed devices(VSD) in China's South-to-North Water Diversion Project,the changing rules of pumping system performances under variable speed operation were investigated.It was pointed out that the conventional pump affinity laws were not suitable any more when the net head was greater than zero while VSD were used,and a new affinity law was proposed.By means of linearized pump performances at rated rotational speed,simpl... |
| Keywords: | Pump Performance prediction Variable speed operation Variable speed scope Specific energy |
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