SU976539A1 - Grain cleaning machine - Google Patents

Abstract

GRAIN-CLEANING MACHINE, including frame, drive and sieve drum, equipped with cleaners, characterized in that, in order to improve the quality of cleaning of the sieve drum, the cleaners are equipped with disc and bristle brushes diametrically opposite to the sieve drum.

Description

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9d SP

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The invention is intended for cleaning and sorting airflow and sieves of various grain materials.

A grain cleaning machine is known, in which sieve holes of the one-type MeHHO are cleaned with several (e.g., four) bristle brushes p. Installing several bristle brushes on each sieve does not provide high-quality cleaning of the sieve holes from stuck particles.

The purpose of the invention is to improve the quality of cleaning the holes of the sieve drum.

To achieve this goal, a disk and a bristle brush are jointly installed in a known machine, while the brushes are set diametrically opposite to the sieve surface.

Combined installation of disc and bristle brushes provides the most efficient cleaning of sieve holes. This is explained as follows.

It is most difficult to clean the sieve holes from the particles of material being separated which are firmly held in them. Such particles, as a rule, protrude above the surface of the sieve and their connection with the hole is most effective on crushing disk brushes having sufficient radial rigidity. However, such brushes, moving the particle into the hole, can not completely push it beyond the hole. Bristle brushes due to the flexibility of the bristles penetrate deep into the holes and finally push the particles beyond their limits. However, such brushes in connection with

the smaller radial rigidity of the individual needles cannot break the connection with the openings of the strongly held particles. Therefore, the joint work of the disk and bristle brushes gives an additional effect in cleaning the holes.

The placement of the brushes in the machine diametrically opposite to the sieve surface ensures more uniform (at each moment of time the cleaning of the holes around the sieve perimeter. The drawing schematically shows a grain cleaning machine.

The machine consists of a frame 1, a drive 2, a sieve drum 3 and cleaners 4.

The cleaners 4 are provided with diametrically arranged disk brushes 5 and bristle brushes 6.

The machine works as follows.

The original grain mixture enters the inner surface of the sieve drum 3. Under the action of centrifugal forces of the rotational motion of the sieve drum of the grain mixture, an annular layer forms on its surface, and under the action of inertial forces of oscillatory motion of the sieve drum the grain layer moves from top to bottom. Thus, sieving of the grain mixture occurs through the holes of the sieve drum.

Disk brushes 5 clean the holes of each sieve from particles protruding from the holes, and bristle brushes 6 from particles located in the depth of the holes.

As a result of this cleaning of the sieve holes, the quality of screening fractions of the grain material is improved.

Claims (1)

A GRAIN-CLEANING MACHINE, including a frame, a drive and a sieve drum equipped with cleaners, characterized in that, in order to improve the cleaning quality of the sieve drum, the cleaners are equipped with disk and bristle brushes located diametrically opposite to the sieve drum.