DE1113603B - Cleaning in the combine harvester - Google Patents

Description

GERMAN

PATENT OFFICE

V18602 ΠΙ / 45 e

REGISTRATION DATE: MAY 12, 1960

NOTICE
THE REGISTRATION
AND ISSUE OF
EDITORIAL: SEPTEMBER 7, 1961

The invention relates to cleaning in a combine harvester, in which the items to be cleaned are cleaned by means of a feed screw reaches a rotating sieve drum, through an attached to the front of the sieve drum Suction fan pre-cleaned during the sieve drum passage and post-cleaned in a sifter channel will.

With the advancing mechanization of the various crop harvesting methods are constantly regional Connected expansions of mechanized harvesting processes. The combine wins in mountainous areas Terrain has a special meaning.

It is obvious that when combine harvesting on a slope, the facilities in a combine harvester have to experience certain changes. That for a perfect extraction and salvage of the grain the most important unit of the combine harvester - cleaning - is therefore subject to special consideration and requires its own conception.

Experience has shown that the well-known flat screen cleaners are used for the purpose of using on slopes Combine unsuitable. The flat screen combine harvester moving uphill provides a useful one Degree of cleaning of the goods, however, occurs as a result of the inclined sieve surface towards the end of the machine a strong abrasion of the grain to the chaff portion and causes substantial losses of grain. When driving downhill The separation of short straw, ears and other additions from the grain is achieved the rising surface of the cleaning sieves at the end of the machine has such an adverse effect that the The prevailing damming effect of the material on the sieve surface delays the separation process and a strong Penetration of the grain with impurities results.

The inadequate cleaning function of uphill and downhill harvesting combines can can be partially improved by means of so-called louvre sieves as cleaning sieves, since the louvre flaps can be adjusted according to the working conditions and thus promotes or retards the items to be cleaned sliding over the screen surface can act.

But apart from the constant operation of the sieves that becomes necessary as a result, there is Change of inclination in the line of the slope when the machine is sloping sideways - i.e. when harvesting in Layer line - the adjustability of the louvre flaps has practically no effect. It is well known that the most unfavorable cleaning effect is seen with a sideways incline Machine. The lateral sliding of the goods to the side part of the flat sieves lying down the slope Cleaning in the combine harvester

Applicant:

VEB combine harvester plant Weimar,
Weimar, Buttelstedter Str. 4

Walter Tobisch, Weimar,
has been named as the inventor

leads to completely unsatisfactory cleaning work, especially if the inclination is greater. Longitudinal subdivisions on the sieve surfaces only produce acceptable results for small side slopes.

In view of this disadvantageous function of flat screen cleaning in uneven harvesting areas, the Invention of the usability of already known and proven cleaning elements and poses the Task, through sensible combination as well as through novel arrangement and construction features of cleaning elements to create an effective cleaning device in the combine, which is independent of different working positions of the machine a compulsory loss-reducing grain guidance to recovery and thus achieved an advantageous cleaning effect.

The solution to the problem is achieved as follows: The items to be cleaned first arrive threshing via elevator and feeder screw into a rotating sieve drum, which is on the inside with a normal worm gear and is provided with lifting blades. When the What is good through the sieve drum is first pre-cleaned, with short straw and chaff parts in are usually picked up by a suction fan and transported to the chaff collection. By grains emerging from the sieve drum shell, which are still through fine weed seeds, chaff and small pieces of straw are contaminated, experience an accelerated impulse by means of an accelerator roller, how they z. B. has become known in stationary cleaning systems.

According to the invention, the rotating accelerator roller is immediately below and axially parallel to the Sieve drum arranged. The roll shell is designed according to the invention so that it has the counter shape one on the inside through several parallel adjacent

109 687/55

Claims (4)

3 4 line 7 lying on top of one another, channel-like interconnects, of a line 7 not shown in more detail in the drawing Directional shaft represents the directionally the suction fan provided a part of the admixtures of the Roll shell is tangent and absorbs in a known manner in the threshed material to be cleaned and acute angle against the cleaning air flow on this via line 7. Housing a sifter channel opens. 5 Sieved grain, which through the sieve drum The clean coat caught by the accelerator roller falls and still with fine weed seeds, gungsgut, which is mixed by this on a speed, chaff and short straw particles, is of speed of about 15 m / sec. is brought, rushes through the axially parallel within the jacket housing Trough-like guideways of the straightening shaft and the accelerator roller arranged for the sieve drum 4 therefore, detected by the respective transverse or longitudinal io 10, the grain mass to be subsequently cleaned remains one position of the machine unaffected, evenly distributed. accelerated exit from the jacket in This equalized width distribution occurs the good housing 9 formed straightening shaft 11 mediated. Of the into the sifter channel in which the post-cleaning straightening shaft 11 runs - seen in cross section - supply or separation of the higher inertia force tangentially and across the entire width of the Besieh moving grains from the lighter crop 15 accelerator roller 10. This is in the parallel secondary parts in the usual way through the channel-like conductor tracks 12 lying one above the other through the cleaning air he follows. Splits. The cylindrical surface of the accelerator The accelerated grain hits an elongated roller, which is adapted to the The direction of the confluence of the straightening shaft is provided on the corresponding recesses and one Housing of the sifter channel, specifically on which the one 20 has a certain amount of trimmings, e.g. bristles the sifter housing wall on the opposite side of the mouth, due to the increased onto the trough of a known conveyor device, acceleration process directly on the interconnects 12 is through at least one trough side wall, which as the directional shaft 11. The directional shaft 11 opens elastic impact-absorbing grain impact surface formed on the sifter channel 13 and is at an acute angle against is, collected and directed from the conveyor to 25 the cleaning air flow. The one at the Brought salvage. Dung escaping grain rushes through the blower 14 Only partially or not threshed ears, the cleaning air flow generated, will finally pass by the sieve drum and, due to its relatively high weight, the grain impact surface 15 will not be caught by the suction and will be picked up in the trough 16 by the screw fan, not even by the 30 conveying device 17 for collecting grain 18, 19.
The similarly accelerated lighter components of combine harvesters, the cleaning air flow in the direction of the screening drum, carries the cleaning air flow in the direction of the screening drum arranged post-threshing-conveying-wise adjustable housing part 20 of the unscrewed screw whose longitudinal axis direction is roughly shown chaff collection or the straw mass to; crosses at right angles with the sieve drum axis. These 35 these are thus eliminated from the machine, space-saving arrangement gives a further rough components, z. B. partial or unfavorable advantage of the cleaning according to the invention and the threshed ears are fed from the worm gear 5 of the possibility of a direct conveying path of the post-post-threshing screw conveyor 8, the threshing material to the threshing drum with omission otherwise side of the sieve drum 4 and below the usual suction elevators. 40 funnel 6 is arranged so that both units 4 Should the constant functional reliability of the cleaning and 8 in the axial direction at right angles to each other are preserved on slopes, this is from the stand. continuous feeding, i.e. from a stowage In order to evenly loosen up the cleaning free feeding of the items to be cleaned. To achieve the gauging mass in the rotating screen cylinder, In order to achieve these requirements, the invention includes the lifting scoops in the form of simple web plates nis a simple solution. After this, the 21 is offset within the worm gear 5. Feeder worm brought onto the screen by means of a hollow shaft. drum shaft bearing. The drive takes place here. The entire cleaning system is through the elevator, with the feeder auger with an example on a shaker-free combine harvester higher speed than the sieve drum rotates. 50 provided. The threshing process is carried out by the threshing In one embodiment, the invention drum 22 is adopted. The straw leaves are explained in more detail. It shows the machine at the bottom. The at the straw 1 shows the schematic of a side view of the clean returns still from the straw film over the bar grating feed system (lower part in section), 25 separated grain fractions are removed from the feed 2 shows a section of the system according to cutting guide screws 26 and 27 and through the guide channels line AB in Fig. 1, 28 and 29 with that of the threshing drum 22 on 3 shows a section of the straightening shaft, along the stepped floor 30, corresponding to the section CD in FIG Fig. 4 is the diagram of a combine with the elevator 1 passed, from where passage and built cleaning system according to the invention. 60 cleaning process takes place in the manner described above. Installation of the system is also possible in the combine harvester shaft 2 sleeve-like feeder screw 3 of the machines, which are equipped with shakers and rotating sieve drum 4, which are threshed out, for example below the clean items to be cleaned during the by means of which an arrangement can be arranged,
65 arranged on the inner surface of the sieve drum 4 Worm gears 5 conditional inevitable through- PATENT CLAIMS: run it roughly pre-cleaned by placing the sieve on the front 1. Cleaning in the combine harvester, in which the drum 4 of the hopper 6 with connected suction cleaning items by means of a feed screw to a rotating sieve drum arrives, is pre-cleaned by a suction fan attached to the front of the sieve drum during the sieve drum passage and after-cleaned in a sifter channel, characterized in that underneath and axially parallel to the sieve drum (4) a known accelerator roller (10) is arranged, the roller shell of which is an inside through a plurality of parallel juxtaposed channel-like guide tracks (12) subdivided and tangential to the roll shell straightening shaft (11) is adapted. 2. Cleaning according to claim 1, characterized in that approximately in the extended confluence direction of the straightening shaft (11) on the housing of the separator channel (20) on the housing wall opposite the confluence, axially parallel the trough (16) of a known conveyor device (17) is attached to the accelerator roller (10) is and at least one trough side wall (15) is designed as an elastic, impact-absorbing grain impact surface. 3. Cleaning according to claim 1 or 2, characterized in that below the end face The end of the screening drum (4) is a post-threshing screw conveyor that is common on combine harvesters (8) is provided, the longitudinal axis direction of which is approximately at right angles to the screen drum axis crosses. 4. Cleaning according to one of claims 1 to 3, characterized in that the feed screw (3) of the sieve drum (4) mounted on the sieve drum shaft (2) by means of a hollow shaft and the feed screw (3) is designed with a higher speed than that of the sieve drum (4). Considered publications:
German Patent Nos. 399 329, 642 914;
U.S. Patent No. 1568,618. 1 sheet of drawings © 109 687/55 8.61