Research on optimization design of suspended self-cleaning pump front filter in complex irrigation area

doi:10.13733/j.jcam.issn.2095-5553.2024.09.044

Abstract

Abstract:

In response to the complex water quality environment in irrigation areas，which leads to frequent clogging of the pump front filter and requires a lot of manpower and financial resources，an automatic cleaning pump front filter is designed. The automatic cleaning device controls the opening condition by using the pressure difference .P at the filter outlet greater than the preset pressure difference P. A mathematical analysis was conducted on the working flow field of the filter，and the mathematical relationship between the control volume Q and the surface area S of the surrounding fluid was obtained. The suspension box was designed with a convex concave feature of 50 mm every 150 mm，which improved the bearing strength of the suspension box. The key parameters of the filter were designed，and six different pressures provided by the water pump for the outlet of the filter were numerically simulated. The pressure difference .P between the inlet and outlet of the filter was obtained，providing a reference for setting the preset pressure difference P. Finally， experiments were conducted on six different pressures，and the results showed that as the pressure at the outlet of the filter decreased， the start stop cycle of the automatic cleaning device and the cleaning time of the filter showed an increasing trend. As the pressure at the outlet of the filter decreases，the pressure difference between the inlet and outlet of the filter continuously decreases. The driving force of the internal impeller of the filter is weakened，and the rotation speed of the filter slows down， resulting in a longer cleaning time for the filter. Through the test experiment and application，the filter can effectively prevent the sand and bacteria and algae organisms from entering the micro.irrigation system，and the self.cleaning device can effectively clean the sand and bacteria and algae organisms adhering to the filter screen，which completely realizes the unmanned cleaning of the filter screen and greatly reduces the labor force.

Key words: self-cleaning, pump front filter, optimization design, filter screen, differential pressure ,

摘要：

针对灌溉区复杂的水质环境导致泵前滤网频繁堵塞需要耗费大量的人力财力等问题，设计一种自动清洗的泵前过滤器。通过滤网出水口压差.P大于预设压差 P作为自动清洗装置控制开启条件，对滤网工作流场进行数学分析，得到控制体体积 Q和包围流体的表面积 S等相关变量的数学关系，对悬浮箱进行每间隔 150 mm采用 50 mm的凸凹特征设计，提高悬浮箱的承载强度，对滤网关键参数进行设计，对水泵为滤网出水口提供的 6种不同压强进行数值模拟，获得滤网出入口压差.P，为预设压差 P的设置提供参考。最后，对 6种不同压强进行试验。结果表明，随滤网出水口压强降低，自动清洗装置启停周期和滤网清洗时间呈现增加的趋势。随着滤网出水口压强降低，滤网出入口压差不断减小，滤网内部叶轮受压力的驱动力减弱，滤网旋转速度变慢，导致滤网清洗需要更长的时间。通过测试试验与应用，过滤器能够有效地阻止砂石和菌藻类生物进入微灌系统，自清洗装置能有效地清洗黏附在滤网上面的砂石和菌藻类生物，完全实现滤网无人清洗，大幅度地降低劳动力。

关键词: 自洁式, 泵前过滤器, 优化设计, 滤网, 压差

CLC Number:

Zhao Ying, Zhang Shuangxia, Wu Yuxiu, Jiang Kun. Research on optimization design of suspended self-cleaning pump front filter in complex irrigation area [J]. Journal of Chinese Agricultural Mechanization, 2024, 45(9): 291-296.

赵瑛 , 张双侠 , 吴玉秀 , 蒋坤 . 复杂灌溉区悬浮自洁式泵前过滤器优化设计研究[J]. 中国农机化学报, 2024, 45(9): 291-296.

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