SU741822A1 - Grain harvester - Google Patents

Description

one

The invention relates to the field of agricultural engineering, in particular to combine harvesters, and can be applied when harvesting rice and other crops.

A combine harvester containing a header, a threshing machine, a straw walker, a transport board, an air-sieve cleaning li.

The disadvantages of the known combine are its low productivity, since the suspended grain, deposited on the transport board, mixes with the straw fraction, which prevents its separation.

The purpose of the invention is to increase productivity, reduce losses and improve the quality of grain cleaning.

This is achieved by the fact that in a combine harvester the transport board is made of trellis and under it the grain conveyor is placed with a trellised endless working branch forming

an overpressure chamber containing a container for collecting grain and a device for transporting it to a hopper; in addition, additional fans are installed in the conveyor chamber to create an overpressure; in this case, the grating transport board is installed adjacent to the first cleaning sieve; grain conveyor with its output end adjacent to the entrance area

10 second sieve cleaning.

FIG. 1 shows a diagram of a combine harvester with one mollusc apparatus; in fig. 2 - the same, with two threshing machines.

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The combine harvester includes a header 1 with an inclined chamber 2, a Threshing drum 3 with a concave 4 and a receiving beater 5 and a fender beater 6 installed at the inlet of the straw walker 7.

20 Below the threshing unit are a grate transport board 8 and an air-grate cleaning consisting of a sieve 9 with an extension 10, a fan

1 and conveyor 12 grains. The sieve 9 is mounted adjacent to the grate transport board 8. The conveyor 12 of the serum is made with a grated endless working branch forming the chamber 13 with an overpressure created by additional fans 14, the chamber 13 is installed downhill 15, forming a container for collecting grain, and a device 16 for transporting it to 17. The conveyor 12 of the grain adjoins its output end to the entrance zone of the ear auger 18.

For using the proposed device in a double-drum modification of the combine harvester behind the threshing drum 3, an intermediate beater 19, a threshing drum 20 with an underlay, 21 and a pick-up beater 6 are installed. The conveyor 12 of the grain adjoins the second cleaning sieve 22 blown by the air flow valve with its outlet torus 23 “Under the sieves 9 and 22, there is a sloping board 24 and a grain auger 25 for collecting grain from under the second crushing drum 20 to the second bunker 26.

The work of the combine is as follows

The grain mass, mowed by the header 1, is fed by the inclined chamber 2 to the threshing drum 3 and the fender beater 6 is directed to the straw walker 7. The main mass of grain allocated to the grate 4, settled on the grate transport board 8 under the influence of oscillations of the latter and the air flow generated by the fans 11 and 14, is sifted onto the grain conveyor 12. A heap of straws, coming down from the straw walker 7 for cleaning, is deposited onto the layer left on the trellised transport board 8 of the straw mass from the threshing drum 3. D Yoked along the lattice transport board 8 and the sieve 9, the heap is loosened by the air flow of the fan 11 and 14, while the released grain is sifted to the grain conveyor 12 and, passing through its working lattice branch, enters the pitched boards 15 of the chamber 13 and the device 16 is fed to the hopper 17. Lightweight straws from the fans 11 and 14 are blown out of the cleaning limits by the air flow. The wreckage of the horse from the conveyor 12 grain and

The HAMMER from the extension 10 enters the auger screw 18 and returns to the domolot,

In a two-drum modification of the combine, the mass not wetted by the drum 3 by the intermediate beater 19 is directed to the hammer to the drum 20 in a hard mode. The straw straw mass, threshed by drum 20, the fender beater 6, is directed to straw walker 7. The grain with a part of chaff and crepe separated through concave 21 and grain straw straw separated by straw walker 7, successively to the straw pile, located on the transport board 8 in the loosened state by the air flow from the fans 11 and 14, are also loosened and subjected to the vibratory action of the transport board 8. As a result, a part of the grain is sifted onto the conveyor 12 of the grain, and the remaining mass moves to the first sieve of 9 cleanup. Grain and straw particles from the second threshing drum 2O and the straw walker 7, passed to the grain conveyor 12, are processed together with the weight from the first threshing drum 3. The biologically valuable grain enters the bunker 17, and the rest of the pile goes to the second sieve 22 The grain-straw mass moves along the lattice transport board 8 and redistributes the grain and the straw mass over the thickness of the layer in such a way that at the beginning the grain goes off on the sieve 9 and the straw-stone moves for some time on the finger grid of the transport board 8. When it descends on the first sieve 9, it is loosened by air flow, freeing the grain sifted with the rest of the grain on the second sieve 22. The undersize from the sieve extension 1O 9 and large particles from the sieve 22 go to the screw 18 and are directed by the air stream, freeing the grain, to the domolot. The grain that has cleared the cleaning is fed to the auger 25 along the pitched board 24 and sent to the hopper 26.

The use of the invention in combine harvesters with one or two threshing drums ensures the continuity of the process of separation and cleaning of threshed grain, which reduces the load on the separating working bodies and provides an increase in pro. performance of the combine, decrease in losses of grain and improvement of its cleaning.

Claims (4)

Claim 1. Combine harvester, including header, threshing machine, straw walker, transport board, air sieve cleaning and hopper, characterized in that, in order to increase productivity, reduce losses and improve the quality of grain cleaning, the transport board is lattice and a grain conveyor is placed under it with a trellised endless working branch forming a chamber with excess pressure and containing a container for collecting grain and a device for transporting it to the hopper. 2. Combine pop, 1, characterized in that, in order to create excess pressure in the conveyor chamber, it is equipped with additional fans. 3. The harvester for PP. 1 and 2, about g l and - 5 that the lattice transport board is installed adjacent to the first cleaning sieve. 4. The harvester for PP. 1-3, characterized gem that transporter 10 grain with its output end adjoins the input zone of the second cleaning sieve.