RU207989U1 - Axial-rotor final threshing device - Google Patents

Abstract

The utility model relates to the field of agricultural engineering, in particular, to the designs of axial-rotary re-threshing devices used in selective corn harvesters and stationary threshers of high-quality and hybrid corn cobs. The proposed axial-rotary re-threshing device allows intensifying the process of re-threshing corn cobs, speeding up the withdrawal of separated grain from the action of working bodies and minimizing the number of macro- and microdamages of corn grain by alternating contact of re-threshing corn cobs with smooth and relief areas of the inner surface of the cylindrical deck. 4 ill.

Description

The utility model relates to the agricultural engineering industry, in particular, to the designs of axial-rotary final threshing devices used in selection corn harvesters and stationary threshers of high-quality and hybrid corn cobs.

There is a known re-threshing device for a corn thresher [UA 86546 U, A01F 11/00 (2013.01), 10.01.2014] in which the re-threshed corn cobs are moved by a rotor inside a cylindrical deck, while the deck consists of two parts, equipped with independent thorns, which are around the entire circumference of the deck closed with pneumatic cushions.

Known threshing and separating device with a system of oriented feeding of corn cobs for threshing [RU 171115 U1, A01F 11/06 (2006.01), 05/22/2017], in which the corn cobs are threshed in a cylindrical threshing part of the deck, equipped with independent from each other movable spikes, pressed by several separate pneumatic cushions with flexible bottom.

The main disadvantage of these devices is the use of a deck with a smooth inner surface and slots of a rectangular cross-section located on it for removing the threshed grain, which makes it difficult to remove the threshed grain from the action of the working bodies and leads to damage to the corn grain.

The design of the axial-rotary threshing device is based on the task of intensifying the process of threshing corn cobs, accelerating the removal of the separated grain from the action of the working bodies and minimizing the amount of macro- and microdamage to the corn grain by alternating contact of the threshing corn cobs with smooth and relief sections of the inner surface of the cylindrical deck ...

This is achieved by the fact that the axial-rotor final threshing device contains a loading chute, a rotor with blades in the form of a multi-start screw winding, a cylindrical deck with upper and lower half-decks, equipped with longitudinal housings on the outer surface with rubber chambers inserted into them pumped with air and fixing them in the deck openings longitudinal rows of movable thorns. In this case, the lower half-deck is equipped with smooth sections alternating on its inner surface with longitudinal rows of movable spikes and relief sections with longitudinal slots of variable cross-section.

The essence of the utility model is illustrated by drawings, which show an axial-rotor final threshing device:

fig. 1 - axial-rotary final threshing device in isometric, front view;

fig. 2 - bottom half-deck of the axial-rotor final threshing device in isometric view, top view;

fig. 3 - a fragment of the relief section of the lower half-deck of the axial-rotary final threshing device, along A in FIG. 2.

fig. 4 is a section of a relief section of the lower half-deck of an axial-rotary final threshing device with slots of variable cross-section, along B-B in FIG. 3.

The design of the axial-rotor final threshing device consists of a loading chute 1, upper 2 and lower 3 half-decks connected to a cylindrical deck, with a gap covering the rotor 4 with blades in the form of a multi-thread helical winding 5. On the outer surface of the cylindrical deck, longitudinal housings 6 are fixed with inserted into them with air-pumped rubber chambers 7 fixing longitudinal rows of movable spikes 8 in the deck holes. In this case, the lower half-deck 3 is provided with smooth sections 9 alternating on its inner surface with longitudinal rows of movable spikes 8 and relief sections 10 with longitudinal slots 11 of variable cross-section.

The axial-rotor final threshing device works as follows. Under the threshing apparatus of the selection harvester or the main threshing chamber of the stationary thresher, the under-threshed corn cobs are fed to the threshing chute along the loading chute 1 into the gap between the upper 2 and lower 3 half-decks of the cylindrical deck and the rotor 4. Rotating rotor blades 4 move the threshing mass of corn cobs along the power line. by the action of movable spikes 8 located on smooth areas 9, pressed against the corn cobs by rubber chambers 7 pumped with air, thereby ensuring the separation of the corn grain from the rods. Next, the final threshing mass of corn cobs is moved along a helical path in the gap between the cylindrical deck and the rotor 4 with contact along the relief section 10 of the inner surface of the lower half-frame 3, thereby providing vibration of the final threshing mass of corn cobs and accelerated withdrawal of the separated corn grain from the device through the slots 11. When moving the final threshing corn cob mass along a helical trajectory in the gap between the cylindrical deck and the rotor 4 repeatedly alternate the contact of the final threshing corn cobs with smooth areas 9 and relief areas 10 located on the inner surface of the lower half-frame 3, which helps to accelerate the process of final threshing of corn cobs and separated grain from the action of the working bodies, thereby minimizing the amount of macro- and micro-damage to the corn grain.

The proposed axial-rotary final threshing device allows to intensify the process of final threshing of corn cobs, to accelerate the withdrawal of the separated grain from the action of the working bodies and to minimize the amount of macro- and microdamage to the corn grain by alternating contact of the final threshing corn cobs with smooth and relief areas of the inner surface of the cylindrical deck.

Sources of information

1.UA 86546 U, A01F 11/00 (2013.01), 10.01.2014. The final threshing apparatus of the corn thresher.

2. RU 171115 U1, A01F 11/06 (2006.01), 22.05.2017. Threshing and separating device with a system of oriented feeding of corn cobs for threshing.

Claims (1)

An axial-rotor final threshing device containing a loading chute, a rotor with blades in the form of a multi-pass screw winding, a cylindrical deck with upper and lower half-decks, equipped with longitudinal housings on the outer surface with rubber chambers inserted into them pumped with air, fixing longitudinal rows of movable spikes in the deck holes , characterized in that the lower half-deck is equipped with smooth sections alternating on its inner surface with longitudinal rows of movable spikes and relief sections with longitudinal slots of variable cross-section.

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