Size uniformity and soil coating intensity by centrifugal sprayers of fertilizers

Abstract

Fertilizer plays an extremely important role in the pursuit of maximum yield, but do not forget about distribution systems. One of the most important characteristics is the accuracy of the spread, since the unevenness of the process can significantly reduce the efficiency. The article considers the conditions for achieving uniformity of coverage and its intensity within the treated strip, determines the width of the soil capture strip covered by centrifugal fertilizer spreaders. The high initial velocity of the ejected particles leads to a large width of the soil capture band treated by centrifugal fertilizer spreaders, much more than other designs for this purpose. The uniformity of the distribution of material within the strip is achieved by combining the contact point of two adjacent scattering plumes with the point of incidence of a particle moving along a ballistic trajectory. The intensity of soil fertilization by fertilizer depends on the speed of the unit in the axial direction and the productivity of the entire installation. A classification of fertilizer equipment has been introduced. According to the type of fertilizer applied, there are spreaders for organic fertilizers, mineral and organic-mineral. The technological process of applying organic fertilizers with body spreaders consists in feeding the entire volume of fertilizer to the distributing working bodies installed in the rear of the body by the plate-conveyor. The scientific work on the dispersion of solid particles by centrifugal fertilizer spreaders is analyzed, where the theory of the movement of bulk material along the blades of centrifugal apparatuses and its distribution over the field surface are examined in detail. The study of the influence of the shape of the blade on the kinematic parameters of particle motion can be useful in the design of the corresponding working bodies.