DESENVOLVIMENTO DE UM ASPERSOR AGRÍCOLA ROTATIVO COM DEFLETOR CÔNICO

Abstract

The main concern in irrigation is the conscious use of water resources, producing more with less. Technological advances in agriculture seek, day after day, new studies and equipment to improve irrigation systems with new types of accessories, materials, sprinklers, etc. as a way of minimizing energy consumption. the aim of this study was to evaluate the range and uniformity of a rotating agricultural sprinkler with a conical deflector, created using autodesk's 3d inventor modeling software. The sprinkler developed has a conical deflector with eight spiral cavities, which start narrow at the top and widen at the bottom, forming a curve in their walls. A tape measure was used to measure the radius of reach, starting at the base of the riser pipe up to the maximum reach of the jet. The uniformity test used 4 nozzles of different diameters, No. 4 light blue (1.59 mm), No. 5 beige (1.98 mm), No. 6 dourado (2.38 mm) and No. 7 lima (2.78 mm), at a pressure of 1.7 bar and a height of 0.5 m. With a spacing of 1 m and arranged in 4 quadrants, the 100 collection cups were 0.25 m from the ground. the results obtained for the radius of reach and uniformity for nozzles 4, 5, 6 and 7 were 2.3 m; 48.63%, 2.6 m; 54.26%, 4 m; 48.71%, 5.5 m; 46.05%, respectively. The radius of reach varied as the nozzle diameter increased and the uniformity coefficients were below 60%. The low uniformity coefficient may be related to the area of the deflector cavities, which may have produced an excessive pressure drop at the time of distribution.