SU1366108A1 - Cleaning unit for grain combine harvester - Google Patents

Description

The invention relates to agricultural machinery. The invention improves the performance and versatility of cleaning and reduces the loss and crushing of grain by leveling the bottom sieve load and ensuring adjustment of the air flow direction in different areas under the top sieve. Cleaning the combine harvester includes a transport board and an upper sieve 2 mounted behind it with an extension installed that can be rotated relative to the attachment points. Under the upper sieve 2 there is a lower sieve, and under the shaker board a fan. In the grooves 6 of the frame of the upper sieve 2 fixed guide boards (ND) 7 with threaded connections 8.

To ND 7 threaded connections 9 attached retractable shield 10. Retractable shield 10 has grooves 11 to adjust its position relative to ND 7. The sides of ND 7 have grooves 12 of the angle adjustment. The grooves 6 provide a change in the position of the ND 7 along the length of the upper sieve 2. The adjustment of the position of the ND shield is carried out when setting up cleaning for various operating modes. 1 z.p, f-ly. 2 Il.

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The invention relates to agricultural machinery and can be used when upgrading combine harvesters.

The purpose of the invention is to increase the productivity and versatility of cleaning, as well as to reduce losses and crushing grain by leveling the load of the lower sieve and ensuring adjustment of the direction of the air flow in various areas under the upper sieve.

FIG. 1 shows a general view of the device; in fig. 2 - node I in figure 1. 15

Cleaning a combine harvester includes a transport board 1 and an upper sieve 2 installed behind it.

By the end of the upper sieve 2 attached extension 3 with the possibility of rotation 20 relative to the attachment points. A fan 4 is installed under the shaker board 1, and a lower sieve 5 is installed under the upper sieve 2. In the slots 6 of the frame of the upper sieve 2, the guides 25 of the board 7 are fixed with threaded joints 8. A sliding shield 10 is attached to the guide board 7 with threaded joints 9 grooves 11 for adjusting its position 30 relative to the guide board 7. The sides of the guide board 7 have grooves 12 for adjusting the angle of inclination.

Cases 6 provide a change in the position of the guide boards 7 along the length of the upper sieve 2.

Cleaning combine harvester works as follows.

Depending on the type and condition of the crop set optimality op- ₄₀ angle and position of the guide boards 7 over the length of the upper sieve 2 and the position of sliding panels ⁰ 10. To change the position of the guide boards 7 by the angle ₄₅ and the length of the sieve 2 attenuates threaded connections 8 and in slots 6 and 12 we shift and turn in the right direction. When each guideboard 7 reaches the required position, we produce them. fixing by tightening the threaded connections 8. To change the position of the sliding shields 10, loosen the threaded joints 9, shift the shields along the slots 11 and fix them in the desired 55 position by tightening the threaded joints 9.

In the process of harvesting a pile of grain from under the threshing drums and straw walkers enters the transport board 1, where under the action of oscillatory movements it moves towards the upper sieve 2. When the heap comes off from the end of the striking board 1, it gets affected by the flow of the fan 4 and oscillatory movements of the blinds the upper sieve 2. As a result of the separation process, grain is released, which wakes up through the upper louver, sieve 2 and gets onto the guide boards 7, and straw and other particles through the blinds and air on stream are removed from the grind. Untreated spikelets are caught by the extension 3 and are sent to re-ground. Under the action of oscillatory movements and slope, the grain along the guide boards 7 and the retractable whales 10 falls on the lower sieve 5 with an offset To its beginning, thus ensuring a more uniform loading by itself. The displacement of grain entering the lower sieve 5 from the middle and rear zones, to the initial and middle ones, ensures optimal sieve loading, which contributes to a more complete separation of the grain and prevents its descent into the auger auger. At the same time, creating a directional air flow that is optimal for each zone upper sieve, contributes to the separation of separation and the throughput of cleaning in general.

Thus, the guides dOski 7 with sliding shields 10, mounted on the bottom frame of the upper frame 2 with the ability to adjust the longitudinal and angular position, provide a redistribution of grain; arriving at the lower sieve 5 by shifting it to the initial and middle parts, which provides the boler with a complete selection of grain on the lower sieve and prevents it from descending into the auger auger. This eliminates the removal of the shriveled grain from the end of the upper sieve 2. At the same time, the guide boards 7 serve to regulate the flow of air entering the upper sieve louver, which contributes to improving the cleanliness of the harvest for harvesting crops of various types and conditions and thereby increasing the productivity and versatility of the combine.

s 1366108 4

Claims (2)

Claim 1 o Cleaning of a combine harvester, including a shaker board, upper and lower louvre sieves with frames, extension and fan, characterized in that, in order to increase productivity and universality of cleaning, reduce losses and crush the grain by leveling the load of the sieve and ensuring adjustment of the air flow direction in different areas under the upper sieve; • 2. Cleaning under item 1, characterized in that the guide boards are equipped with retractable shields.