排灌机械工程学报2012，Vol.30Issue(3)：368-372,5.DOI:10.3969/j.issn.1674-8530.2012.03.023
双向步进式全射流喷头工作稳定性
Working stability of two-way stepping fluidic sprinkler
摘要
Abstract
The differences between the forward- and backward-stepping process of the two-way stepping fluidic sprinkler of type PXSB50 were analyzed to study the stability of the sprinkler. The gas-liquid two-phase flow in the pipes for controlling forward- and backward-stepping process was studied and the pressure difference in the pipes was compared. The length of the deriving fluid tube, the size and position of the air compensating hole have influence on forward or backward-stepping frequency and angle, spraying range. The frequency was increased but the spraying range was with reducing length. For the same length, the forward-stepping frequency was considerably higher than the backward-stepping frequency; accordingly the spraying range in the forward-stepping process was smaller than that in the backward-stepping process. The closer the air compensating hole was placed to the reversing mechanism , the faster the stepping frequency becomes, and the smaller both the stepping angle and the spraying range get. For the two-way stepping fluidic sprinkler of type PXSB50, an optimum combination of the length of the deriving fluid tube, the size and position of the air compensating hole was obtained by theoretical analysis and experiment, those parameters as follows; the length of the deriving fluid tube 378 mm, the length of the forward-stepping pipe 648 mm, the length of the backward-stepping pipe 648 mm, the diameter of the forward-stepping air compensating hole is 2. 0 mm, the diameter of the backward-stepping air compensating hole is 2. 5 mm, the position of the forward-stepping air compensating hole is 3 mm.关键词
全射流喷头/双向步进/稳定性/步进频率Key words
fluidic sprinkler/two-way stepping/working stability/stepping frequency分类
农业科技引用本文复制引用
王超,李红,杨炎财,陈超,徐敏..双向步进式全射流喷头工作稳定性[J].排灌机械工程学报,2012,30(3):368-372,5.基金项目
国家自然科学基金资助项目(51049011) （51049011）
国家农业科技成果转化项目(2011GB2C100015) （2011GB2C100015）
