RU2239300C1 - Organic fertilizer distributor working member - Google Patents

Abstract

FIELD: agricultural engineering; fertilizer.

SUBSTANCE: working member of fertilizer has screw with throwing member rigidly secured on end of shaft. Throwing member is made in form of truncated cone with throwing radially arranged along its side surface and symmetrically displaced relative to each other over circumference in staggered order. Cone with blades is enclosed with clearance in fixed conical case with throw out aperture. Discharge end of feed screw is limited by fixed branch pipe.

EFFECT: provision of uniform distribution of fertilizer on field surface.

1 dwg

Description

The invention relates to agricultural machinery, namely to machines for spreading fertilizers.

Known rotor of the spreader of organic fertilizers, containing a hub, on which the disk is fixed with blades having working and non-working surfaces, and in the center of the blades coaxially with the axis of their rotation there is a distributor in the form of a truncated cone ending in part of a sphere [1].

This rotor of the fertilizer spreader does not provide sufficient uniformity of the distribution of fertilizers on the field surface, since with the same parameters of the rotor blades the centrifugal throwing force from each blade is the same and the fertilizer flow does not disperse along the length of the throw.

Known fertilizer spreader, including a thrower in the form of a disk rotating in a fixed casing with blades fixed on it on both sides, while the number of blades on different sides of the disk is different [2].

The disadvantage of the described thrower is that when connecting two discharged fertilizer streams from the blades on both sides of the rotating disk into one stream due to the small distance between the blades equal to the thickness of the disk, the flows mutually affect each other’s flight speed and, accordingly, the range and uniform distribution of fertilizers along the length of the cast.

The aim of the invention is to increase the uniformity of the distribution of fertilizers on the surface of the field.

This is achieved by the fact that the working body is made in the form of a cone coaxial with the feed screw with casting blades mounted staggered symmetrically on its side surface and rotating in a fixed casing having an exhaust window.

The drawing shows the working body of the machine for spreading fertilizers, top view.

The working body includes a screw 1, on the shaft end 2 of which the thrower is rigidly fixed in the form of a truncated cone 3 with throwing blades 4 radially placed along its lateral surface and symmetrically offset relative to each other around the circles in a checkerboard pattern. The cone 3 with the blades 4 is enclosed with a gap in a fixed conical casing 5, having an exhaust window 6, and the discharge end of the feed screw 1 is limited by a fixed pipe 7.

The working body of the machine for spreading fertilizers works as follows.

The screw 1 with a shaft 2 and a cone 3 with blades 4 are driven into rotation. The screw 1 through the stationary pipe 7 delivers fertilizer to the top of the cone 3, where it spreads in the gap between the surfaces of the rotating cone 3 and the stationary casing 5.

The principle is based on a change in the radius of the spreading blades 4 relative to the axis of rotation of the cone 3 along the length of its generatrix. As a result, the centrifugal throwing force of the fertilizer from the blades 4 increases as the radius of the circle of their location and, accordingly, the throwing distance increase.

Under the condition of identical sizes of the blades 4, the fertilizer mass arriving at them and its angular velocity of rotation are constant, and the radius of the circles of rotation changes. Therefore, the centrifugal force of throwing fertilizer from the blades increases with increasing radius of the circumference of the location of the blades 4. The symmetrical arrangement of the throwing blades 4 with their staggered movement along the surface of the cone 3 contributes to the uniform distribution of fertilizer on them when it moves in the gap between the surfaces of the cone 3 and the casing 5 and eliminates the possibility of connecting the ejected fertilizer flows with the blades 4 in a common stream. This leads to an increase in the uniformity of the distribution of fertilizers over the field surface.

Sources of information

1. Auto USSR No. 1521327. A1, cl. A 01 C 3/06, 11/15/1989.

2. Auto USSR No. 716530, class A 01 C 17/00, 02.29.1980.

Claims (1)

The working body of the machine for spreading fertilizers, including a shaft with a screw, the unloading end of which is placed in a fixed nozzle, and a thrower limited by a casing, characterized in that, in order to increase the uniform distribution of fertilizers on the field surface, the thrower is installed coaxially with the feed screw and is made in the form cone with throwing blades fixed symmetrically along its lateral surface and offset relative to each other along the perimeters of variable circles in a checkerboard pattern.