摘要
为满足灌溉施肥和多营养调配的需求,设计了一款简易型3通道施肥机。通过试验的方法,研究不同灌溉主管进口压力、流量和吸肥通道开启个数对吸肥量的影响规律,以及施肥水泵的水力规律。结果表明:主管进口压力、吸肥通道开启个数对吸肥量有影响,主管进口流量对吸肥量无影响。3个吸肥通道全部开启时,随主管进口压力的增大,总吸肥量逐渐减小;开启1个或2个吸肥通道时,总吸肥量在一定压力范围内基本保持不变,随后逐渐减小。建立了总吸肥量与主管进口压力、吸肥通道开启个数的回归模型,可用于吸肥量估算。水泵效率随主管进口压力的增大而增大,当3个吸肥通道全部开启时施肥水泵效率最高。所揭示的施肥机的吸肥规律及施肥水泵的水力规律,可为施肥水泵的选型设计提供参考。
In order to meet the needs of fertigation and multi-nutrition allocation,this paper designed a simple 3-channel fertilizer applicator.By means of experiment,the influence law of inlet pressure,flow rate and opening number of fertilizer suction channels on the amount of fertilizer absorption was studied,as well as the hydraulic law of the fertilizer pump.The results show that the main pipe inlet pressure and the number of fertilizer suction channels have effects on the amount of fertilizer absorption,while the main pipe inlet flow has no effect on the amount of fertilizer absorption.When all three fertilizer absorption channels are opened,the total amount of fertilizer absorption decreases with the increase of inlet pressure of main pipe.When one or two fertilizer absorption channels are opened,the total amount of fertilizer absorption remains basically unchanged within a certain pressure range,and then gradually decreases.The regression model of total fertilizer absorption,inlet pressure of main pipe and opening number of fertilizer absorption channels was established and could be used for fertilizer absorption calculation.The efficiency of pump increases with the increase of inlet pressure of main pipe and reaches the highest when all the three fertilizer absorption channels are opened.The law of absorbing fertilizer and the law of hydraulic power of fertilizer pump,which are explored in this paper,can provide reference for the selection and design of fertilizer pump.
作者
陈囡囡
朱德兰
柏杨
杨亚林
CHEN Nan-nan;ZHU De-lan;BO Yang;YANG Ya-lin(Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest A & F University,Yangling 712100,Shaanxi Province,China;College of Water Resources and Architectural Engineering,Northwest A& F University,Yangling 712100,Shaanxi Province,China)
出处
《节水灌溉》
北大核心
2019年第5期17-20,26,共5页
Water Saving Irrigation
基金
“十二五”国家科技支撑计划(2015BAD22B01-02)
杨凌示范区产学研用协同创新重大项目(2017CXY-09)
国家外国专家局“111”计划项目(B12007)
关键词
灌溉施肥机
文丘里施肥器
施肥水泵
吸肥性能
fertigation machine
venturi injector
fertilizer pump
fertilization performance
