SU1486092A1 - Thresher of grain heap and after-threshing of spikes - Google Patents

Description

The invention can be used in the cleaning of a combine harvester. The purpose of the invention is to increase productivity and reduce grain loss by dividing the grain heap into two streams. The grain mass is captured by the drum 1, rotating counterclockwise, dragged through the concave 2, threshed and the striker 4 is fed

<2

on the straw walker 5, where the grain is separated from the straw. The first flow of grain heap, passed through the concave 2 grating, enters the lower transport board 6, flows through it into the air flow created by the fan 13, and then to the lower sieve 10. The second flow of grain heap from under the grate 3 and straw walkers 5 enters the upper transport board 7 and the bar grate 8, and then - on the upper sieve 9. On both sieves a pile is blown by the air flow. Grain is sifted through the sieve and along the cattle board 11 enters the grain auger 15. Impurities from both sieves are fed to the extension cord 12, where they are separated from the non-crushed spikelets, which fall onto the tapered auger 16. Large impurities come off the extension and together with the light impurities brought out air removed from the thresher.

1 hp ff, 1 ill.

with

£

The invention relates to agricultural machinery and can be used in the cleaning of a combine harvester.

The purpose of the invention is to increase productivity and reduce grain losses by dividing the grain flow of two streams.

The drawing shows the thresher, which is part of a combine harvester.

It consists of a threshing and separating device, including ί

drum 1, lattice concave 2 with finger grille 3, bumper beater 4, straw walkers 5, two transport boards 6 and 7, bar bars 8 mounted on transport board 7, upper and lower sieves 9 and 10, pitched board 11, extension cord 12, mounted on the rear edge of the bottom sieve 10, the fan 13, in the exit window of which the air-guide vanes 14, the grain auger 15 and the auger screw 16 are installed.

1486092 A1

1486092

Thresher works as follows.

The grain mass comes from the harvested part of the combine, is picked up by the drum 1 and dragged through the gap between it and the concave 2. At the same time, the grain mass is threshed and most of the grain (70-90%), as well as chaff and torn ears, are separated through the concave and entered on the transport board 6. The straw with the remaining grain is thrown out of the threshing gap and the fender 4 is fed to the straw walker 5. On the straw walker, the grain is separated from the straw. The straw comes off the straw walker, and the grain and particles of the chopped straw fall onto the transport board 7. Thus ^ a grain pile separated from the straw moves in two streams: the first stream with high grain content in the form of chaff and torn spikelets moves along the transport board 6 and thanks to the downward slope of the rear part goes to the lower sieve 10, the second stream with a high content of crushed straw moves along the transport board 7 and enters the upper sieve 9. The first stream falls from the transport board 6 to the lower sieve 10 is blown by the fan 13, which helps to remove light impurities, and then it is separated on the sieve 10. The grain passes through the holes and goes along the cattle board 11 into the grain auger 15, and large impurities leave the sieve on the extension cord 12. The second tray sieve 9, blown by air, is cleared of large straw. and light impurities. The grain passes through the holes of the sieve 9, then the sieve 10 and in the same way as in the first flow enters the screw 15.

Next, all the refined grain is fed to the bunker. Impurities that have descended from the upper sieve fall onto the extension cord 12 and, under the influence of the air flow, the lightest of them are carried outside the limits of the thresher. On the extension cord 12, the impurities from both streams are combined. Non-gilted spikelets and grain that has not passed through into the holes of the sieves enter the spike screw 16 and then are fed to the second thresh. Large impurities descend from the extension cord 12 and are removed outside the thresher.

Claims (2)

Claim 1. Thresher combine harvester, including a threshing and separating device, consisting of a drum lattice concave, an earth beater with a finger lattice, a transport board with a bar lattice, a fan, upper and lower sieves, an extension of the sieve, pitched plank, grain and kolovoy augers, different so that in order to improve performance and reducing grain losses by dividing the grain pile into two streams, the beginning of the upper transport board fitted with bar grating is located under the finger grating of the baffle beater, and its end is above the leading edge of the upper sieve, the lower transport board is positioned so that its end is above the exit fan window, and the extension is attached to the rear end of the lower sieve. 2. Thresher according to claim. ^, Characterized in that the back of the lower transport board is bent with respect to the front of the down. 1486092