SU959844A1 - Grain cleaning machine - Google Patents

Description

The invention relates to a technique for separating bulk materials by size and can be, in particular, used for separating grain mixtures.

A grain cleaning machine is known, including a vertically arranged cylindrical sieve connected to an electric drive, an unbalance vibrator supplying and discharging nozzles l.

Also known winnowing machine, comprising a frame sieve TsI.PINDRIcheskoe installed vertically and fixed by means of lever-hinge suspension on a hollow drive shaft of the unbalance soderzhsschy samobalansny vibrator fixed on the shafts, connecting rod pivotally connecting the sieve with samobalansnym vibrator feeder and receivers separation products 2.

A disadvantage of the known devices is the low efficiency of the separation process.

The purpose of the invention is to increase the efficiency of the separation process by communicating the biharmonic oscillations in the vertical direction to the sieve.

This goal is achieved by the fact that the shafts of the self-balancing vibrator are arranged in horizontal planes, the shafts placed in one plane interconnected by means of gears with the number of teeth twice the number of gears connecting the shafts placed in another plane.

ten

We take into account the self-balance. The vibrator is made four-shaft.

In addition, the self-balancing vibrator is mounted on the frame using

15 springs.

The drawing shows the proposed grain cleaning machine.

It includes body 1, frame 2, - inlet funnel 3, spreader 20 4, hollow drive shaft 5, cylindrical sieve 6 connected to shaft 5 by means of lever-hinge suspension 7, self-balancing vibrator 8 containing unbalances fixed on shafts 9, and mounted by springs 10 on frame 2, yoke 11, connecting rod 12, pivotally connecting a sieve through a yoke 11 to a self-balancing vibrator, a sieve cleaner 13, scrapers 14-16, receivers of separation products 17-19, made in the form of trays.

The machine is operated in the following way.

The sieve b from the electric drive through the shaft 5 and the lever-hinged device 7 provide rotational movement, and from the unbalanced vibrator through the yoke 11 and the connecting rod 12 - oscillations in the vertical direction, making the vibrator four-fold, placing the shafts in horizontal planes, connecting the shafts in the same plane by means of gears with the number of teeth, twice the number of gear teeth connecting the shafts placed in a different plane, the sieve moves up and down at different speeds. When the sieve moves upward, the projections of the inertia forces of the unbalances of different planes onto the vertical axis add up, and when the sieve moves downward, they are subtracted. This causes the vibrator and its associated sieve 6 to move according to the law of biharmonic vibrations.

The source material through the funnel enters the spreader 4, which supplies it to the inner surface of the sieve 6. Under the action of centrifugal forces, the particles of the material are pressed to the surface of the sieve, some of the particles having a size less than the size of the sieve holes are sifted through it and unload on the tray 17. the rest the mass of particles moves down the sieve, making oscillatory movements in the vertical direction, while due to the difference of inertial forces acting on the material during the sieve movement up and down, ensuring loosening of the material and thus creating the conditions for the fine particles to reach the screening surface. These particles are discharged to tray 18. Large particles are discharged to tray 19.

Thus, placing the shafts of the self-balancing vibrator in horizontal planes, connecting the shaft

placed in one plane by means of gears with a number of teeth twice the number of gear teeth connecting shafts placed in another plane, allows

to loosen the material by telling the particles of biharmonic vibrations in the vertical plane and, consequently, to increase the efficiency of the separation process.

Claims (3)

1. Grain cleaning machine 5, which includes a frame, a cylindrical sieve, mounted vertically and fixed with the help of a lever-hinged suspension on the hollow drive shaft, a self-balancing vibrator containing unbalances, Q mounted on the shafts, connecting rod, pivotally connecting the sieve with the self-balancing vibrator, spreader and receivers of separation products, differing from the fact that In order to increase the efficiency of the separation process by messages to the sieve of biharmonic oscillations in the vertical direction, the shafts of the self-balancing vibrator are placed in horizontal planes, the shafts placed in one plane interconnected by means of gears with the number of teeth twice the number gear teeth, connecting shafts, placed in a different plane. 2. A machine in accordance with claim 1, wherein the self-balancing vibrator is four-shaft. 3. The machine according to claim 1, distinguished 0 c and with fi in that self-balancing The vibrator is mounted on the frame with springs. Sources and1 Formations, 5 taken into account in the examination 1. USSR author's certificate No. 435863, cl. JB 07 B 1/22, 1971. 2. USSR author's certificate No. 483152, cl. B 07 Oe 1/26, 1972 (large type).