6种文丘里施肥器吸肥性能比较分析  

Comparative Analysis on Fertilization Performance of Six Venturi Injectors

作　　者：韩启彪[1,2] 黄兴法[3] 刘洪禄[4] 吴文勇[4] 范永申[1,2] 

机构地区：[1]中国农业科学院农田灌溉研究所,新乡453002 [2]河南省节水农业重点实验室,新乡453002 [3]中国农业大学水利与土木工程学院,北京100083 [4]北京市水利科学研究所,北京100044

出　　处：《农业机械学报》2013年第4期113-117,136,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：'十二五'国家科技支撑计划资助项目(2011BAD25B01);北京市农业科技资助项目(20080509)

摘　　要：对北京地区微灌常用的6种文丘里施肥器进行了试验,在理论分析的基础上结合相关数据,建立了6种文丘里施肥器吸肥量、入口流量、临界流量和临界压差的回归模型并进行了比较分析。结果表明:进、出口压力直接影响了施肥器的吸肥量和入口流量,施肥器YR、RF对压力波动等不利工况较敏感,而AD系列和NF则更能适应波动的工作压力环境。NF和AD-1等临界压差小,工作区间大;而RF和YR工作区间小,只有临界压差达到进口压力1/2以后才可正常吸肥。文丘里施肥器的结构对其水力性能影响较大。An experiment on six Venturi injectors in Beijing was carried out. Based on theory studies, the differences of fertilization performance including fertilizer suction amount, the inlet discharge, the critical discharge and the critical pressure were analyzed and the regression models were built. It showed that the fertilizer suction amount and the inlet discharge were affected by the inlet and the outlet pressure directly. Domestic brands YR and RF were sensitive to the pressure fluctuation, while foreign models NF and AD could adjust to work environment better. The critical pressure of brands NF and AD - 1 were very low, thus these models have a long working range. In contrast, the critical pressure of the models RF and YR got to a half of the inlet pressure for a normal fertilization, and this means they have a short working range.

关 键 词：文丘里施肥器 吸肥性能 吸肥量 入口流量 临界压差 临界流量 

分 类 号：S275.5[农业科学—农业水土工程]