RU2785467C1 - Eeder house for grain harvest - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture. The inclined chamber of the combine harvester contains a receiving beater (2), straw combs (3), a separating grate (4) and a device for removing the separated grain heap (5). The separating grid (4) is made in the form of strips with fixed tubes. The tubes are made with holes in one or more rows, directed upwards at an angle α_pot. ≤90° in the direction of movement of the combed heap for the exit of compressed air supplied to them under high pressure, at a speed higher than the soaring speed of the non-grain part of the heap, but lower than the speed grain winding.

EFFECT: reduced injury and grain crushing.

1 cl, 3 dwg

Description

The invention relates to agricultural engineering, in particular to the creation of grain harvesting equipment.

An inclined chamber of a combine harvester is known (patent for invention RU 2577892 C1, A01D 41/12, publ. 2016) containing a bottom, a conveyor for moving grain mass along it and a device for removing free grain separated through the holes of the slatted bottom. At the same time, the separated granular fraction is fed by means of a screw onto a transport board for further cleaning.

The disadvantage of this device is the need for additional purification of grain obtained after separation in an inclined chamber.

Known feeder house combine harvester (patent for invention RU 2380883 C1, A01D 41/12, A01F 12/20, publ. 2010), taken as a prototype. It includes a body, a receiving beater, a threshing drum, straw combs, a breaking beater, separating grates, a device for removing the separated grain heap in the form of a scraper conveyor.

The disadvantage of this device is the threshing of already selected free grain in the combed heap, which leads to an increased level of injury and grain crushing, as well as insufficient separation of free grain.

The objective of the present invention is to reduce injury and grain crushing.

The stated technical problem is achieved by the fact that the proposed feeder chamber of the combine harvester contains a separating grid, in the form of strips with fixed tubes, and the tubes are made with holes in one or more rows directed upwards at an angle α _pot. .≤90° in the direction of movement of the combed heap, for the exit of compressed air supplied to them under high pressure, at a speed higher than the soaring speed of the non-grain part of the heap, but lower than the soaring speed of the grain.

This invention is illustrated by drawings:

in fig. 1 schematically shows the feeder house of a combine harvester;

in fig. 2 is a schematic representation of a separating grid;

in fig. 3 shows tubes of a separating grid with one or more rows of holes.

The inclined chamber of the combine harvester includes a housing 1, a receiving beater 2 for moving the combed heap, a straw comb 3, a separating grate 4, a mesh 5 for air outlet and a device for removing the separated grain heap 6 (Fig. 1). Separating grid 4 is made of tubes 7 fixed on slats 8 (Fig. 2a), while tubes 7 are made with holes 9 (Fig. 3) in one or more rows for compressed air to exit at an angle α _pot. ≤90° (Fig. 2a), which is under high pressure in them, at a speed higher than the soaring speed of the non-grain part of the crop, but lower than the soaring speed of the grain.

Feeder house combine harvester works as follows. When the combine harvester moves across the field, the heap collected by the noiling method, consisting of the grain part of the crop, ears and chaff (hereinafter the combed heap), is fed into the body 1 of the feeder house (Fig. 1). When moving the combed heap with a receiving beater 2 and straw combs 3 along a separating grid 4 (Fig. 1) made of tubes 7 (Fig. 2) with holes 9 (Fig. 3) and slats 8 (Fig. 2) with compressed air supplied separately to each tube 7 (Fig. 2), there is a separation of the fractions moving along the separating grate 4 (Fig. 1). Due to the release of air from the holes 9 (Fig. 3), the grain, which has the highest soaring speed of those fractions that are in the combed heap, will tend to move in the lower layer under the action of gravity and fall through the separating grate 4 to the device for removal of grain heap 6 (Fig. 1). In this case, the value of the air flow velocity V _pot. (Fig. 2a) will be less than the soaring speed of grain (9.0 ... 11.0 m/s), but more than the soaring speed of the non-grain part of the combed heap (straw - 5.9 ... 7…5.3 m/s; ear rods - 2.7…4.0 m/s). After exiting the holes 9 (Fig. 3) of the tubes 7 (Fig. 2), the air will leave the body 1 (Fig. 1) of the feeder house through the grid 5 (Fig. 1) to maintain atmospheric pressure in the feeder house.

Claims (1)

An inclined chamber of a combine harvester, containing a receiving beater, a straw comb, a separating grate and a device for removing the separated grain heap, characterized in that the separating grate is made in the form of strips with fixed tubes, the tubes being made with holes in one or more rows directed upward at an angle α _pot. ≤90° in the direction of movement of the combed heap for the exit of compressed air supplied to them under high pressure, at a speed higher than the soaring speed of the non-grain part of the heap, but lower than the soaring speed of the grain.

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