ASABE Technical Library - Abstract

Abstract. As a kind of advanced water-saving irrigation technology, sprinkler irrigation system is adaptable to many crops, soils, and topographic conditions. As the most important parts in sprinkler irrigation system, the function of sprinklers is to distribute water uniformly over the land, their performances directly affect the sprinkler irrigation system and engineering quality. At present, the most representative and most widely used sprinkler of the high pressure sprinklers is vertical impact drive sprinkler. Taking the drive vane of vertical impact sprinkler as object, the influence of the width of curve blade (Factor A), the width of straight blade (Factor B) and the number of blades (Factor C) on stepped angle, the shifting frequency, sprinkler irrigation coefficient of variation (Cv) and water distribution were analyzed by single factor experiment, and the equations between stepped angle, the shifting frequency and different parameters were built up. The results showed that: there is a linear relationship between Factor A and stepped angle, the shifting frequency; the irrigation uniformity of single sprinkler increases with Factor A, the sprinkler was suited to work single when Factor A was 10 mm, the sprinkler was more suitable for the overlapping irrigation when Factor A was 7 mm. It was found that a nonlinear relationship existed between Factor B and stepped angle, the shifting frequency; the sprinkler was more suitable for the overlapping irrigation with no straight blade. There is a linear relationship between Factor C and stepped angle, the shifting frequency; the irrigation uniformity of single sprinkler increases with Factor C, the sprinkler was suited to work single when Factor C was 3, the sprinkler was more suitable for the overlapping irrigation when Factor C was 7.