RU162756U1 - CLEANING THE GRAIN COMBINE - Google Patents

Abstract

Cleaning the combine harvester, including a shaking board installed in front of the upper louvre sieve with an extension attached to it, a lower louvre sieve, under which there is a pitched board of the sieve mill, and a fan, characterized in that an additional sieve is installed between the lower louvre sieve and the pitched board, and at the front lower end of the ramp airlock.

Description

The utility model relates to agricultural engineering and can be used in the construction of combine harvesters.

Grain heap enters the upper louvre sieve along the transport board, waking grain enters the lower sieve. Under the sieve is directed a stream of air from the fan that blows light impurities. The peeled grain, passing through the lower sieve, enters the grain auger, and the under-milled spikelets go immediately to the spike auger. The unfinished grain enters the extension of the upper sieve, from where it enters the spike auger. (V.M. Khalansky, I.V. Gorbachev, “Agricultural Machines”, Moscow: KolosS, 2004, 624 p.)

The disadvantage of the classical cleaning system during harvesting is the impossibility of isolating small weed impurities from the grain mass having the same or close critical speed of rotation as the grain of the harvested crop. This leads to a decrease in the marketability of a batch of grain, an increase in the load of machines during post-harvest processing.

As a prototype, the design of the combine cleaning system was chosen (copyright certificate 1445628), the design of which includes an upper transport board, a lower transport board with a grill with adjustable holes installed on it, the end of which is located above the top of the sieve, a two-diffuser fan, one of the nozzles which is located between the transport boards and sieve mill with upper and lower sieves.

The disadvantages of the prototype include the fact that this cleaning design does not allow to isolate small seeds of weeds, the windage of which is comparable to the windage of grains of the harvested crop.

The objective of this utility model is to improve the quality of grain cleaning, due to the allocation of a small component from the grain heap.

The task of cleaning the combine harvester consisting of a shaking board installed in front of the upper louvre sieve with an extension cord fixed on it, the lower louvre sieve under which there is a pitched board of the sieve mill, the spike elevator located behind the lower louvre sieve, the grain elevator located after the pitched board and fan is solved by installation of an additional sieve between the lower louvre sieve and the pitched board, where a small component is separated from the grain heap. To remove them from the harvester, a lock gate is installed at the lower end of the ramp.

The claimed utility model is illustrated in the drawing, which shows the cleaning of a combine harvester.

The proposed device consists of a shaking board 1 installed in front of the upper louvre sieve 2 with an extension 3 fixed on it, a lower louvre sieve 4 under which there is a pitched board 5 of the sieve mill, an additional sieve 6 fixed between them, an elevator 7 located behind the lower louvre sieve, grain elevator 8 located after the additional sieve, lock gate 9 located on the lower end of the ramp and fan 10

The proposed device operates as follows. Cereal small heap arrives on the shaking board 1, where there is a loosening and separation of the particles of the heap in density. The prepared heap enters the upper louvre sieve 2 on which the bulk of the grain, parts of spikelets (beans) and particles of impurities having a critical speed of rotation close to the grains of the harvested crop are separated (wet weed seeds with direct combining). And large impurities and a small component of the heap, which has a critical speed of soaring less than that of the grain of the harvested crop, are removed by the air flow created by fan 10 outside the combine. On the extension of the upper louvre sieve 3, the remaining under-thinned spikelets (beans) are captured. The lower louvre sieve 4 divides the component of the grain heap that has passed through the upper louvre sieve into unfinished spikelets (beans) that go to the spike elevator 7 and the main grain with small weed impurities that are not blown by the air stream. This heap falls on an additional sieve 6, where it is divided into clean grain, descending into the grain elevator 8 and small impurities falling on a blank pitched board 5 moving to the lower part of the sieve mill. Subsequently, these impurities are removed from the cleaning system using a lock gate 9.

Output. The proposed design for cleaning the combine harvester with the installation of an additional sieve above the ramp board and a lock gate at the lower end of the ramp board can improve the quality of grain cleaning. And also reduce energy costs for its post-harvest processing.

Claims (1)

Cleaning the combine harvester, including a shaking board installed in front of the upper louvre sieve with an extension attached to it, a lower louvre sieve, under which there is a pitched board of the sieve mill, and a fan, characterized in that an additional sieve is installed between the lower louvre sieve and the pitched board, and at the front lower end of the ramp airlock.

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