SU1547862A1 - Vibration centrifugal sifting machine - Google Patents

Abstract

The invention relates to the separation by grain size of grain mixtures, by-products of grain processing and components of animal feed in grain processing and animal feed plants. The goal is to reduce the bo grain. A cylindrical sieve 1 with elastic supports 5 and 9 is mounted on a vertical shaft 2 under a screening machine pitcher. Coaxially with a sieve 1, a casing 3 is mounted on elastic supports 9 connected through a bearing assembly with a shaft 2. Sieve cleaners 17 and vibrators are mounted on casing 3 18 to communicate the vertical vibrations of the sieve 1. Ramps 16 are installed along the helical line on the inner surface of the casing 3. The disturbing force of the vibrators 18 acts in the vertical direction, causing the system to oscillate, including the sieve 1 and the casing 3 with the bottom 4 and the cover 8. Nax under the action of centrifugal inertia forces, the grain moves down the surface of the sieve 1. The passage through the sieve holes 1 of the grain by the ramps 16 and the blades 15 is transported to the outlet 12. Large impurities do not pass through the holes 12, move down the sieve 1 and out the blades 14 through the other hole 13 and the bottom 4 of the casing 3. 2 z. . f-ly, 1 ill.

Description

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The invention relates to devices for the separation by size (grain mixtures, processed grain products, as well as feed components, and can be used in the processing and feed mill enterprises.

The purpose of the invention is to reduce the Bo Grains.

The drawing schematically shows a vibrating centrifugal screening machine. 25

Vibro centrifugal screening machine contains a cylindrical vertical sieve drum (sieve) 1, rigidly mounted on the shaft 2. Coaxially with it is the casing 3 of the cylindrical building. The bottom 4 of the casing is provided with elastic supports 5. The lower support 6 of the shaft of the sieve drum is installed on the bottom, the upper bearing 7 on the cover 8 of the casing. A drive pulley 9, a distributor 10 and a power supply device 11 are fixed on the shaft.

There is an opening 12 in the bottom of the casing. For passing the carriageway fraction out of the machine and the opening 13 for withdrawal of the tailing fraction, and the sieve drum is supplied with g (boxes 14 and 15 for transporting the fractions to these holes.) 16 ending at outlet 45.

Cylindrical cleaners 17 are pivotally attached to the uprights of the casing and spring loaded to the sieve drum. The bottom of the casing is supplied with two or several paired electrovibrators 18, with the axis of rotation of their rotors arranged in a horizontal plane, parallel and equidistant from the axis of the shaft of the sieve drum. The bottom of the casing is rigid. The machine is equipped with an electric motor for driving the sieve drum shaft. Veohn part of the casing

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five

d 5

0

five

On the elastic support 19, mounted on fixed racks.

Sifting machine works as follows.

When the electric motor is turned on, rotation from it is transmitted via a belt drive to shaft 2 with a sieve drum 1. When electric vibrators 18 are turned on due to the hard bottom 4 of the casing 3, they self-synchronize. The disturbing force of the electrovibrators 18 acts in this case in the vertical direction, causing oscillations of the system, including the sieve drum 1 and the casing 3 with the bottom 4 and the cover 8.

Grain with large impurities (flour with randomly caught large impurities) enters through the receiving pipe to the feeding device 11, which, due to the rotation, scatters the grain (flour) evenly around the circumference. Dropping down, then goes to the rotating disk with the blades of the distributor 10 and under the action of centrifugal inertia forces moves to the inner surface of the cylindrical sieve 1. As the sieve drum 1 rotates and oscillates, the grain (flour) under centrifugal inertia forces moves along its surface way down. The grain (flour) passes through the sieve holes and slopes 16 (more than 50%), and the blades 15 are transported to the outlet 12. Large impurities do not pass through the sieve holes, they move down the sieve and are removed by the blades 14 through another hole 13 and the bottom of the casing.

Thus, the initial mixture is divided into two fractions. If it is necessary to divide the mixture into a larger number of fractions, increase the length of the sieve drum by installing two or more sieve sections.

515 78626

Claims (2)

1. Vibro centrifugal screening is installed on elastic supports, machine including installed under the feeder on the vertical shaft of the cylinder 2. The machine according to claim 1, about tl and charic sieve with elastic supports, so that, cleaners are located coaxially with it and connected to the casing, through the bearing assembly with the shaft3. A machine according to claim 1, about a t of a case and a shroud, vibrators for communicating a vertical angle with the fact that it is provided with oscillation vibrations to the sieve and wipers installed on the inner sieves, characterized by the helix surface of the shroud .