DE1607633B1 - Cleaning device in threshing machines - Google Patents

Description

1,607 £ 33

The invention relates to a threshing, ..,. Big. 1 a combine harvester schematically in the longitudinal machine, especially combines, arranged 'cut,' ·. ·

Cleaning device for, the, threshed good, Fig. 2 after the sieve arrangement of the combine harvester

which at least two Gegertein'arider height-offset F i g. 1 on a larger scale as a longitudinal section,
Includes sieves, the width of the Siebanord- 5 Fig. 3 a cross-section-ΙΠ of the sieve assembly comprehensive and influenced by conducting means voltage.

Blown air flow are arranged, and in the to- The combine harvester shown in Fig. 1 has a

breakdown of the blown air flow in width zones multiple housing 10 with a drive machine 11, a rere vertical partition walls in the longitudinal direction of grain tank 12 and a control stand 13 and a run. The height-adjustable cutting table 14 with a cutting or combine harvester succeeded in the threshing units of threshing machines. Werk 15 ^ He "is airf drive wheels 16 and steering for the most part directly through" the concave "and ■> " f ^ raderii ^ lV-Fahrbäf. lit the housing 10 is a <Dreschim other through the intermediary of the straw shaker "factory with a threshing drum 18 and a Dreschmeist via a return bottom to the Siebanord- basket 19 is arranged. The the threshing. h 18J19 vernung for their efficiency) Ά. dier.Höhe the The material left to be left is partly due to a straw scaler sieve losses on the one hand and the achieved purity of the arrangement 20, from which it is ejected over a good on the other hand, the -'dji-terf'the SiebanordQüag return floor 21 on the output end of a blown air flow presented is decisive Another part of the goods in the known cleaning devices, in particular, is separated out by the concave 19 directly in combine harvesters. From this the threshed passage area of the blower reaches the already adjustable guide material. Sieb ^ aBprdnung 2.3, while the straw ildd id Ah over the exhaust 'äes'ScnutÜers'iO the machine

means for the blown air have been arranged. Also via the Abla

the well-known breakdown of the blown air flow lets through. The screen assembly 23 is a fan 24, such as

one or more vertical drum blowers or cross-flow blowers arranged in a longitudinal direction,

running partition walls in broad zones are sufficient

high requirements are not satisfactory. This is referred in particular to FIGS. 2 and 3. the

also applies to further known cleaning device cleaning device comprises two over-standing

in combine harvesters, the sieves lying transversely under the sieves, namely eirr / upper sieve 25 "pd

plate 30 lower sieve 26 running through the cleaning device, which n ^ t -. fteiem distance over each other-

comprise shaped guide webs, which parts of the blower lying preferably in a swinging driven

air flow upwards, ie against the lower surfaces of a frame "arranged". The sieves are to be directed in the direction of the assigned sieves., .. ".., ...-.. _JV;. .. _i: Usually interchangeable. THE ENTRANCE BOARD OF THE TOP

The invention is based on the object, cleaning 's'iebes 25 ends the already mentioned preparatory

Supply devices of the type described above 35 floor 22 with a bar grating 27, which distributes the goods

for optimal coverage of the entire sieve area on the sieve arrangement. Under the lower sieve 26

to be designed by the blown air flow in order to also run a drainage floor 28 for the material obtained

under difficult working conditions a high "which feeds it to a conveyor 29.

Efficiency of the cleaning device without loading the sieves as a whole, overflowing and not through

to achieve limitation of performance. This will cause the material to reach you according to the invention essentially achieved in that .Drain bottom 30, which it over a conveyor in a manner known per se among the seven several "'31 as so-called returns to the threshing mechanism again

transversely and in the direction of flow against the feeds.

Underside of the screen rising guide webs are provided. The outlet channel is against the sieve arrangement. The guide webs enable the partial flows of the blown air, directed by the vertical 45 32 of the already mentioned blower 24, in the th longitudinal walls limited, a pivotable control flap 33 to be arranged the individual length ranges of the individual widths. The outlet channel 32 extends approximately to zones of the sieves with the most favorable intensity in each case over the entire width of the cleaning device to be fed. This allows. Over the entire; Length; _% Of the total of the blower · · ^ by the Kanal32 and width of the screen assembly 50, the blow air for up afforded blast air but is optimally effective in the field of Iockerung the goods and easier screen assembly for removal by longitudinal walls 34, 35 and 36, 37 Ingredients be made. When broken down into several latitude zones. The walls according to a further feature of the invention under 34 and 36, to which several guide webs with free 25 protruding wall webs 38, 39 are preferably assigned via the upper sieve to at least one sieve, are arranged one behind the other, 55 are attached to the upper sieve 25. On the other hand, can the blown air distribution sit in the 'in the individual walls 35 and 3? on the drainage floor 28. Between length areas of the individual sieve width zones, the walls 34, 36 on the one hand and 35, 37 on the other hand, adapt particularly well to the given conditions. extend these protruding on both sides. It will usually be useful to arrange several guide webs 40, 41 and 42, 43 one behind the other. For the sieve 25 and the guide bars 42, 43 opposite the sieve, avoidance of eddy formations which reduce the efficiency and which are spaced differently from one another, it is also recommended that they be arranged and run in the direction of flow, drop-shaped or flat diamond-shaped profiles towards the underside of the associated sieve, increasing in area.

In the drawing, the subject of the invention is shown in With the help of the inventive width dividers

an embodiment shown. It shows the arrangement of the sieves through the walls 34 to 39

on the one hand, and the vertical division through the guide webs 40 to 43, the available screen areas particularly good in terms of bringing about a good degree of efficiency over their entire lengths exploited. Therefore, optimal cleaning results can be achieved.

The embodiment shown is, as already mentioned, only an example implementation of the Invention. This is not limited to this. On the contrary, many other designs are possible. The width of the sieve arrangement could be more or less than two groups of perpendicular Walls 35 to 39 be broken down. In some cases it is advisable to use the spaces under the top sieve on the one hand and the lower sieve on the other hand to be divided into mutually different types.

Claims (4)

Patent claims: 1. Cleaning device in threshing machines, especially combine harvesters, for the threshed Good, which comprises at least two sieves offset in height from one another, which in one die Arranged the width of the sieve arrangement detected and influenced by guide means blowing air flow and several vertical partitions are used to divide the blown air flow into zones of width extend in the longitudinal direction, characterized in that in per se known Way under the sieves (25, 26) several transverse and opposite in the direction of flow the undersides of the sieve are provided with rising guide webs (40 to 43). 2. Cleaning device according to claim 1, characterized in that under at least one Sieve several guide webs (40 to 43) are arranged one behind the other at a free distance. 3. Cleaning device according to claim 2, characterized in that several one behind the other Guide webs (40, 43) are arranged at different distances from the screen surface. 4. Cleaning device according to one or more of claims 1 to 3, characterized in that that the guide webs (40 to 43) approximately teardrop-shaped or flat diamond-shaped profiles, to have. For this 1 sheet of drawings Copy