SU1342445A1 - Distributor of mixtures of mineral fertilizers - Google Patents

Abstract

The invention relates to machines for the application of mineral fertilizers and their mixtures. The purpose of the invention is to reduce energy consumption and increase the width of the sieving. The outer disk 1 is set with the top of the cone down, and the inner disk 4 with the top of the cone up. The blades 5 of the inner disk 4 are made along the line described by the expression of a logarithmic spiral. The working side of the blades 5 is the convex side of the curved surface. Mixed feed is fed to the blades 5 of the disk 4, comes down from them under the action of centrifugal force and enters the inner edges of the blades 2. Having reached the end of the blades 2, the mixed mixture is distributed over the surface of the floor. 4 il. figure 1

Description

113

FIELD OF THE INVENTION The invention relates to agricultural machinery, and specifically to machines for the application of mineral fertilizers and their mixtures.

The purpose of the invention is to reduce energy consumption and increase the sieving width.

On -fig. 1 shows the distributor of mixtures of mineral fertilizers, a cross-section; in fig. 2 is a diagram of mix distributors; in fig. 3 is a plan view of a velocity distribution of particles converging from the blades of the inner disk; in fig. 4 is a diagram of the mutual arrangement of the blades of the disks, cross section;

The distributor of mixtures of mineral fertilizers contains an outer disk 1 (Fig. 1 and 2) on which curvilinear planes of blades 2 are fixed, on top of which plate 3 and the inner disk 4 with curved blades 5 are mounted. Disks 1 and 4 are tapered and mounted on axis 6 so that the top of the cone of the disk 1 is facing downwards, and the top of the cone of the disk 4 is shaped upwards, with the upper edge of the blades 5 located below the upper edges of the internal cutting of the molasses 2.

The blades 5 are curved in plan, the surface of which is described by the expression of a logarithmic spiral (Fig. 3)

g g

4ctg4

de

g

about

H

f

the initial value of the radius of the blades 5; : angular polar coordinate; the angle between the tangent to the surface of the blade and the radius vector.

The working surface of the blades 5 is its convex side.

The blades 2 of the outer disk are curved in plan and are described by the equation of the second-order line. The working surface of the blade 2 is the concave side.

The disk 1 is made conical with the angle of inclination of the generatrix to the horizon o ((10 - 20) ° (Fig. 4), the angle of inclination of the generatrix of the disc is 4 o / p.

The distributor of mixtures of mineral fertilizers works as follows.

The scattering material, for example, mixed mixtures, is fed to the blades 5 of a disk 4 rotating with an angular velocity i) around axis 6, and under the action of centrifugal force moves along the convex (in plan) side of the blade 5. After the vanishing of the blades 5, the particles enter the inner edges of the blade 2 and move them to the periphery of the disk 1. Reaching the end of the blades 2, the particles are distributed over the surface of the field.

Due to the fact that the working surface of the blades 5 in the plan is described along a logarithmic spiral, the angle C (Fig. 2 and 3) between the radius vector and the tangent to the surface of the blade remains constant and thus ensures the condition of the continuous movement of particles along the blades 5. Ensuring the uninterrupted movement of particles is achieved at values of the angle H satisfying the condition

H

 arcsin

(one)

U)

R

where V is the relative velocity of the particles from the blades 5 of the disk 4 ;.

the angular velocity of the disk 4 is the radius of the outer edge of the blades 5 of the disk 4.

If the angle H on the outer edge of the blades 5 is directed against the direction of rotation of the disk 4 (Fig. 3), the value of V, the absolute velocity of depletion of particles from the blades 5, will be significantly less than for the case of radial alignment of straight blades. The use of 4 linear blades on the inner disk with negative angles on their outer edge is not rational, since, if we accept the value of the angle V by the condition (1), particles will detach from the surface of the blades on the initial part of such a blade. This will cause the device to lose its functionality.

After the disc 4 leaves the blades 5, the particle enters the blades 2 of the disk 1, the angle between the direction of the particles and the cone of the disk 1 (FIG. 4) is N. The velocity V from which the particles enter the blades 2 of the disk 1, Rav-31342445

at the absolute velocity of the particles

from blades 5 of disk 4, i.e.

 -, The projection on the tangent to the generators of the outer disk 1 of the incoming particles is equal to V cos (d + dL, j). This Speed component causes particles to strike the blades. It is known that the amount of power expended to overcome an impact is directly proportional to the impact velocity. From the analysis of dependency (2) it follows that. the projection of the initial velocity on the tangent to the generator of the disk 1 is zero if (s + s.) T 2

Taking into account that the angle ot must be taken within o1, 10-20 ° because of the need to reduce the sensitivity of the sieving process to the influence of the wind, the angle dj of the inclination of the disk 4 to the horizon

5G must not exceed (- - d). With

I, T (h S / n min angles - J- and uJ 40 to provide

the condition (1) of continuous movement of the particles on the blades 5 of the disk 4 is not possible. can.

 L

For example, at 7

0

0

five

You reduce the energy to drive the outer disc by 30%, and when s,

ZG-tg energy costs are reduced almost

by 50%. Increasing the angle of throwing ci of particles from zero (for a flat outer disk) to 20 ° makes it possible to increase the average range of particles by 50–100%.

Claims (1)

The invention The distributor of mineral fertilizer mixtures contains inner and outer discs with blades mounted on a single axis and rotating in opposite directions, the blades of the narzgzhny disc made of a curvilinear shape, with a concave working surface, characterized in that in order to reduce energy intensity and increase the width of the screening , the inner and outer discs are cone-shaped, with the outer disc truncated and located at the top down, the inner disk is pointing up at the top, and the blades the inner disk is made along the line described by the equation of a logarithmic spiral with a convex working surface. 0 ag.2 3 7 Phi Compiled by V. Nikolsky Editor II. Gereshi TehredM. Didyk Proofreader M. Maksimishinets Order 4536/1 Circulation 627 Subscription VNIISH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4