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.
.Low-Performances and Determination of Reasonable Scope for Variable Speed Operation[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(4):78-81.
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低扬程泵变速工况性能及合理变速范围的确定   [下载全文]
Low-Performances and Determination of Reasonable Scope for Variable Speed Operation   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:    性能预测  变速运行  变速范围  能耗比
基金项目:
张仁田  程吉林  朱红耕  姚林碧  张礼华
扬州大学
中文摘要: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。
Key Words:
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, simplified methodologies predicting pumping system performances with VSD were put forward. After introducing the conception of specific energy, the energy consumptions of variable operation and other regulation methods were analyzed to pump a specific quantity of water within stipulated period. Based on the consideration of VSD efficiency, electric motor efficiency and the relationship of specific energy with the change of pump efficiency at different rotational speed, a method was brought forward to determine the reasonable and economic scope of variable speed under different net heads.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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