SU35475A1 - Threshing device - Google Patents

Description

  J / V modern gear (pin)

grain threshing drum, capturing with its teeth not threshed eolom, pulls it between the teeth of the deck (sub). At the same time, the action of the centrifugal force of the straw is easy. It creeps from the teeth of the drum,

the working (front) face of the tooth in the direction from its base to the free end (top). This creep is facilitated by the usually existing deviation of the working face of the tooth back from the radial direction.

 The chaff of straw, pulled by the tooth of the drum, slipping from this tooth, is found at the base of some of the teeth of the deck, which prevented further movement of the straw along the bottom). Slide off the tooth of the deck, slide along its working face in the direction from the contraction to the free end of the tooth, and not slit. may, since the workers of the face of the teeth of the drum and deck, when one tooth passes past the other, are close to the mutual parallel position. Therefore, the straw that is carried by the drum into the further X movement on the bottom must either be torn off, which requires great and unnecessary for the removal of grains, the power cost of the engine, or slide, along its length,.

(459),; ,, across the teeth of the deck, having a sawing effect on it. Such movement of straw along the teeth of the soundboard causes very fast wear and excessive friction work, since the length of the tracks with friction points when sliding the straw across the tooth for each straw can be accepted, on average, approximately half the length of the straw, while sliding along the tooth Straw describes a path equal to the length of the working face of the tooth. .

By means of the proposed threshing device, it is intended to facilitate the operation of the threshing drums and increase their productivity.

In FIG. 1 shows the deck and the drum in schematic form; FIG. 2-3 details of the device; fng 4-section along the line L5 in FIG. 2, and FIG. 5-section along the line of VG in FIG. 2

In the proposed perforated device, the teeth of the drum and the deck are attached to such a structure, at which their working faces are projected onto. the plane perpendicular to the drone ala intersected, in the processing of a datum, by a constant angle (Fig. 1), by a larger double angle of friction of the straw on the material

these teeth, if the teeth of the deck and drum are of the same size and the same material. If the teeth of the deck and drum are paired from paaifijij meteors, then the angle 2a should be greater than the sublimation of the friction angles of the straw on the material of the teeth of the deck and about the materials of the teeth of the drum. For this: it is possible, on a single, working (front edge of the tooth of the drum to perform straight,

S-working edge of the tooth of the deck you | 10: a thread along a certain curve, observing the above condition. The convenient pattern is used for the working face of the drum tooth with a logarithmic curve forming a constant angle with the radius vector equal to the angle of straw against the tooth material, and the radius vector must be the radius C) of the drum, continued in {{jaj6aH3). The working rpas and teeth of the deck in projection on the plane, perpendicular to the shaft of the drum, are also obtained in the form of logarithmic spirals.

The drum teeth, constructed according to the stated principle, differ little from ordinary ones in shape. The teeth of the deck get a very peculiar appearance and are greatly stretched along its base (in the course of straw), which entails postural changes in the usual construction not only of the teeth, but also of the whole deck.

Ugolch) The drum's h8ata increases very much in comparison with the toothed threshers of a conventional device and approaches the angle of coverage in the saw threshers;

The threshing process with the teeth of the described construction is carried out in the following way. The portions of the rim, captured 5 times by the teeth of the drum, are carried along by the deck. In addition, with each tooth of the drum, the haul of a piece of straw slides along the tooth under the action of centrifugal force and is dropped by it to the base of the tooth.

The tooth of the drum, which immediately follows this data, only releases the straw from the tooth, seizes this portion of straw that has stopped on the tooth of the decks, and unhindered pulls it from this tooth of the deck according to the direction indicated; R arrow. This straw slides along the tooth of the deck along its working face in the direction from the base of its free end, and the irao worker holds the arzbahn's tooth from the loose end to the base of the tooth. When observing, the condition is relative to the angle; With intersecting projections, killing the deck and the drum, and the plane perpendicular to the shaft of the drum (2 l), the straw is not trapped between the deck and the drum ,; as in women, and freely accomplishes the described movement. Having appeared again at the base of the tooth of the barzban, the portion of straw under consideration again slides down to the base of the next tine of the deck and so on, and it is threshed until this portion of straw reaches the extraction and is not thrown out of the deck working space. Thus, the movement of straw gets a completely different character, not peculiar to the toothed threshers of ordinary

devices.

As a result, according to the inventor, Israel equals the ability to serve; Bread is placed in the drum as when the SRI of straw is located, which is perpendicular to the drum shaft, as is the case with straw, and the threshing in both cases is the same, successfully and with weakened crushing of solos. The BosJfWK feed feeding straw into the drum in a position parallel to its shaft allows, when using this nilting device in combine harvesters, to exclude from the design of the combine one traysporter, transferring bread from the heder cloth to the drum, in the direction perpendicular to the heder (with

the direction of movement of bread on. Besides; unnecessary crushing of straw is avoided by tearing the teeth into decks and wasting mechanical energy for this crushing, as well as reducing the length of the paths made by the straw friction points of the p tooth, as it slides along the edges of the teeth along these faces, rather than along oneself (across the teeth), which reduces the waste of mechanical energy on the unnecessary rubbing of straw in the bottom. This increases the thresher's productivity per unit of power consumed.

Per unit of time. The wear of the working faces decreases and becomes equal in length, in contrast to the wear pattern of teeth of a conventional design, for example, a deck tooth. Combine Advans Rumeli.

The deck with the teeth of the proposed shape is most convenient to be made from individual glass or cast FLAT sections of which 1 planes in the deck are perpendicular to the drum shaft. These sections are somewhat similar to the grate and represent the arcs described by the radii for which the deck should be described. The tooth, decn are stamped or molded together with these arcs, being one of them and becoming a complication of their shape. Deca is assembled from these sections, which are installed mutually in parallel and fastened by wires piercing them, missed through the corresponding holes, in sections. To maintain 1; the necessary distances between section planes between

They are arranged with one or another construction of the struts (for example, lateral projections or sections of tubes that are put on fastening rods between sections). The bars at the ends of the edges of the deck are bent or the nuts are screwed on them, and all sections of the deck are thus firmly tightened between themselves. The bottom of the deck is in this case lattice, which is required for skipping the threshed grain. The entire deck structure is extremely simplified; it reduces the cost, since its sections can be cast from cast iron and do not require separately manufactured teeth.

The subject matter of the invention.

A threshing device consisting of a deck and a drum, characterized in that the working faces of the threshing teeth are formed along a logarithmic curve, the working faces of the teeth of the deck and the drum are angled at a large sum of the friction angles of the threshing products about the tooth material.

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