SU1440395A1 - Working member for dissemination of granulated mineral fertilizers - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to agricultural machinery. The purpose of the invention is to increase the width of the spreading strip and increase the uniformity of the distribution of fertilizers over the floor surface. The working surface of the disk 1 is spherical with a radius of curvature R, and the diameter of the disk is sintf, where φ is half the angle at the top of the sector. When fertilizers are applied to a rotating spherical disk, fertilizer particles slide along the inner working surface from the center to the periphery, making a complex trajectory, redistributing, which increases the width of the material spread with simultaneous uniformity. At the same time, the disk friability decreases. 3 il.

Description

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FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular to machines for the application of granular mineral fertilizers.

The aim of the invention is to increase the width of the spreading band and increase the uniformity of distribution of fertilizers over the surface of the field, as well as reduce the sticking of the disc with fertilizers.

FIG. 1 shows a spherical disk layout; in fig. 2 - theoretical curves of the flight path of fertilizer particles; in fig. 3 shows experimental density curves of fertilizer distribution across the spreading width.

The working unit for sieving granulated mineral fertilizers contains a disk with radial vanes 2 fixed to it. The disk surface is spherical with a radius of curvature R, and the disk diameter is z1pf, where φ is half the angle at the top of the sector, the same angle will be between the tangent Vo and the chord of the sector . It is known that the arrow of the segment

h :: -tg7r, inscribed in a spherical disk

the cone with height h has an angle between the base and the forming side surface

The working organ for sieving granulated mineral fertilizers works as follows.

When fertilizers are fed to a rotating spherical disk 1, fertilizer particles slide along the inner working surface of the center to the periphery, making a complicated trajectory, thanks to the curvilinear surface of the disk, the angle between the direction of particle movement and the horizon line changes from zero (at the center of the disk) to the angle particle gathering f - at the edge of the disk, when the particles descend from it with the speed Vo,

FIG. 2

and for example, when they move along trajectory 2 (Fig. 2), which is built with respect to air resistance for ammonium nitrate granules and crosses the abscissa, 0 m (soil surface) at a distance of 6 m. A conical disk of the same dimensions will provide a descent angle and the flight path of the particles 3, which intersects the abscissa, 0 m at a distance of 9 m, and the flat disk - trajectory 4 with the same initial

the particle vanishing velocity will provide a distance of 1 m, with an angle of 5 - the trajectory of advantages as compared to that is not observed, since the range of particles is 4 m. With a lower disc height above the field, for example, 5 m the difference in the range of particles different discs are even more pronounced. Experimental curve 6 (Fig. 3) characterizes the density of fertilizer distribution Q (g / m) across the width x (m) with the right disk of a serial two-disc spreading machine, its apparatus (LRU) is 0.5 at the height of the disk above the field m , curve 7 is the same for a spherical disk, the left disk provides a symmetric density curve relative to the axis O-Q.

Claims (1)

Invention Formula The working body for sowing granulated mineral fertilizers containing 3Q sh, rotates on the vertical axis a disk with blades fixed on it, characterized in that, in order to increase the width of the spreading and increase the equilibrium distribution of fertilizers over the field, as well as reduce over 25 sticking the disc with fertilizer, the working surface of the disc is spherical, and the disc diameter is determined by the expression  bshf, | de R is the radius of curvature of the disk surface; F - half the angle at the top of the sector,  0 equals 15-20 °.