排灌机械工程学报2011，Vol.29Issue(6)：536-541,6.DOI:10.3969/j.issn.1674-8530.2011.06.015
出口可调式变量喷头喷灌均匀性
Irrigation uniformity of nozzle-changeable variable-rate sprinkler
摘要
Abstract
Based on the analyzing of the key elements that the range and the rainfall distribution of the sprinkler concerned, the key factors that effect the range and the rainfall distribution have been studied. It is found out that the variable-rate sprinkler with only one factor changed had bad irrigation uniformity. To improve the irrigation uniformity of the sprinkler,a new nozzle-changeable variable-rate sprinkler was designed. The new sprinkler adjusts the working pressure and the nozzle area by the flow rate adjusting system and the nozzle area adjusting system. With the co-adjusting of the nozzle area and the working pressure, the nozzle-changeable variable-rate sprinkler has better irrigation uniformity. The hydraulic character of the nozzle-changeable variable-rate sprinkler was tested, and the rainfall distributions of the circle nozzle and the nozzle-changeable were compared. The result indicated that the nozzle-changeable variable-rate sprinkler has better irrigation uniformity. The square irrigation coefficient and the combination irrigation uniformity were studied, and the data indicated that, for the nozzle-changeable variable-rate sprinkler BPY20,the square irrigation coefficient is 97. 8% ,the best combination distance is 1.66,and the combination irrigation uniformity is 75.4%. For the BPY30,the square irrigation coefficient is 91. 5% , the best combination distance is 1. 69, and the combination irrigation uniformity is 77.2%.关键词
摇臂喷头/变量喷洒/喷灌均匀性/出口调节装置/结构设计Key words
impact sprinkler/ variable-rate spraying/irrigation uniformity/nozzle-changeable device/ structure design分类
农业科技引用本文复制引用
陈超,李红,袁寿其,王超..出口可调式变量喷头喷灌均匀性[J].排灌机械工程学报,2011,29(6):536-541,6.基金项目
国家863计划项目(2011 AA100506) （2011 AA100506）
