| 水泵启动时间对灌溉水力旋流器性能的影响 |
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| 引用本文： | 刘竹青,郭聪,严海军.水泵启动时间对灌溉水力旋流器性能的影响[J].排灌机械,2011,29(6):492-496. |
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| 作者姓名： | 刘竹青 郭聪 严海军 |
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| 作者单位： | 中国农业大学水利与土木工程学院,北京,100083 |
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| 基金项目： | 北京市教委科学研究与科研基地建设基金资助项目(20090909) |
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| 摘 要： | 为解决在水泵启动阶段圆锥型水力旋流器过滤性能较差的问题,利用变频控制技术,以DN50圆锥型灌溉用水力旋流器为研究对象,对含沙质量分数分别为0.451%,0.266%和0.124%的3种水沙混合液分别进行了5,15,30,60和90 s的5种启动时间,15,30,90和120 s的4种启动时间以及15,306,0和90 s的4种启动时间的水沙分离性能试验研究.试验结果表明：水泵启动时间越短,大粒径颗粒的分离效果变差,而启动时间越长,小粒径颗粒的分离效果变差;启动过程中水力旋流器的总分离效率及分级性能随时间均呈现先差后好最后趋于稳定的规律;在相同启动时间的同一时刻下,分级性能随颗粒粒径的增大呈现有规律的波动性变化,0.2mm以上粒径级沙粒的分离效果最好.结合总分离效率规律,推荐DN50圆锥型水力旋流器在工作流量为15 m3/h时的水泵最佳启动时间为30 s.
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| 关 键 词： | 水力旋流器 节水灌溉 水泵启动时间 变频控制 分离性能 |
Influence of pump start-up time on performance of hydrocyclone used in irrigation system |
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| Liu Zhuqing,Guo Cong,Yan Haiiun.Influence of pump start-up time on performance of hydrocyclone used in irrigation system[J].Drainage and Irrigation Machinery,2011,29(6):492-496. |
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| Authors: | Liu Zhuqing Guo Cong Yan Haiiun |
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| Institution: | Liu Zhuqing,Guo Cong,Yan Haijun (College of Water Conservancy and Civil Engineering,China Agricultural University,Beijing 100083,China) |
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| Abstract: | In order to improve the poor separation performance of a conical hydrocyclone during the start-up time of a pump unit,taking the DN50 type hydrocyclone as a model,the experimental investigations into the effects of the pump start-up time on the separation performance were carried out using the working liquids with three sand mass fractions by means of the frequency-variable control technology.The start-up times 5,15,30,90 and 120 s for the liquids with 0.451% sand mass fraction,15,30,60 and 90 s for those w... |
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| Keywords: | hydrocyclone water-saving irrigation pump start-up time frequency control separation performance |
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