RU2021858C1 - Machine for grain cleaning - Google Patents

Abstract

FIELD: agricultural mechanical engineering. SUBSTANCE: each stand pipe is made telescopic with a suspended resonator-shaker placed inside it. The upper yoke of each ball support has the inner surface with a slope directed to the sieve periphery. EFFECT: enhanced yield and quality of cleaning in the sieve. 3 dwg

Description

 The invention relates to machines for the separation of bulk materials, in particular for cleaning grain from weed seeds, broken and full grain.

 A known machine for cleaning grain, containing mounted on telescopic supports sieve associated with an oscillatory mechanism [1].

 A disadvantage of the known machine is that telescopic supports serve only to change a fixed angle of inclination of the sieve. As a result of this, restrictions and separation of impurities from the grain are created.

 A known machine for cleaning grain containing a sieve mounted on supports in the form of racks, in the upper part of each of which is placed a spherical bearing, and having an oscillating mechanism [2].

 The disadvantage of this machine is its low productivity.

 There is also known a machine for cleaning grain, which is installed on risers using ball bearings having recesses in the cages, larger than the rolling body, while an oscillating mechanism with a drive is fixed to the sieve [2].

 The disadvantage of this machine is that when installing it on such supports, effective cleaning of the grain is not achieved, since the sieves are partially clogged (since they are not shaken). As a result, this somewhat reduces the performance of the machine as a whole.

 The purpose of the invention is improving productivity as a grain cleaning.

 This is achieved by the fact that each riser is made telescopic with a suspended, spring-loaded resonator-shaker placed inside it, with the upper cage of each ball bearing having an inner surface with a slope directed to the periphery of the sieve.

 In FIG. 1 shows a machine for cleaning grain, side view; in FIG. 2 and 3 - respectively, the upper and lower forms of the clips (view of the inner side).

 The machine contains a deck 1 of a sieve (not shown) with upper clips 2, each of which is mounted on a rolling body 3 (ball), resting on a lower clip 4. The latter is mounted on a telescopic riser 5, inside of which there is a hanging resonator-shaker 6 on springs 7 and 8. The risers are supported by their lower ends on the foundation 9. An oscillating mechanism 10 with a drive 11 is fixed to the bottom of the deck 1. The upper cage of each ball bearing has an inner surface 12 with a slope directed to the periphery of the sieve.

 The machine operates as follows.

 The grain heap comes from the hopper to the receiving section of the screening element - the sieve (not conventionally shown in the diagram). At the same time, the oscillatory mechanism 10 is activated. Under the influence of forced different-frequency vibrations, the grain heap is leveled out on sieves. During this period, the deck will oscillate — forward, backward, left, right, and at the same time as it tilts with shocks down and up due to rolling of the upper clip 2 on the ball 3 along its bevel and along the sphere of the lower clip 4. Moreover, from the action of forced oscillations, the weight of the deck 1 and the mass of grain below the holder 4 on the telescopic risers 5 will oscillate up and down, and the resonator-shaker 6 on the springs 7 and 8 will have a damping effect. As a result, complex oscillations will occur. During this period, deck 1 with sieves will vibrate, i.e., self-shaking and self-cleaning from clogging will occur. Due to the fact that the mixture exfoliates under the influence of cyclic vibrations of supports and resonators-shakers 6, a mode is created along the entire length of the sieves for separating light and sifting small and heavy impurities with various physical and mechanical properties, which prevents them from clogging. At the same time, clips 4 on telescopic struts 5 oscillate with the same frequency, but of a more complex nature.

 As a result, the sieves are self-cleaned from clogging (sticking), and the performance is not reduced.

Claims (1)

 A GRAIN CLEANING MACHINE containing a sieve, which is mounted on risers using ball bearings, having recesses in the cages larger than the rolling body, while an oscillating mechanism with a drive is fixed to the grating, characterized in that, in order to increase productivity and cleaning quality, each riser is made telescopic with a hanging resonator-shaker located inside it, and the upper cage of each ball bearing has an inner surface with a slope directed to the periphery of the sieve.

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