SU535920A1 - Louvre sieve - Google Patents

Description

(54) BLINDS SOLUTIONS

This invention relates to grain cleaning devices of combine harvesters and threshers.

A known louvre sieve, comprising successively located on the frame, one after the other comb-shaped plates, is fixed on the 1st and ons x 1.

When there is a large mass of the heap of a pile located on a known sieve, it is difficult to blow it with an air stream. The smooth ridges of the plastil do not sufficiently loosen the grain heap, so the release of grain from the pile is reduced and at the same time the sieve performance decreases. In addition, the location of the ridges against each other contributes to the orientation of long straws along the slit and their passage through the slit.

The purpose of the invention is to increase the sieve capacity and quality of the separator.

This is achieved by the fact that, in the louvered sieve, the crests of the plates are made with cogged m and side edges with the direction of the teeth in the direction of movement of the grain heap and are placed in the chessboard.

FIG. 1 (The proposed sieve is shown, side view; in Fig. 2 it is the same, top view; in Fig. 3, a cross section of the sieve (along A-A).

The louvre sieve contains a frame / s sequentially installed one after the other

comb plates 2, hinged. But fixed on the axis x 3.

The edges of the crests 4 are provided with toothed protrusions 5 in the direction of the grain heap, and the crests are arranged in a checkerboard pattern.

The proposed louvre sieve works as follows.

The frame / sieve is installed in the sieve pan of the grain cleaning device of the combine harvester and is driven in a forward-learning motion.

A pile of grain fed to the sieve is blown with a double flow of air, transported along the toothed projections 5 of the crests of the 4 plates 2, which contribute to the heaving of the pile and the increased adhesion of the sieve to the straw and the concrete. The chess arrangement of the ridges 4 of the plates 2 disrupts the orientation of the straws along the cracks and this makes it difficult for them to slip under the sieve.

The crests of the plates are provided with stiffeners.

The proposed louvre sieve increases the throughput of the реш-sieve, by 20–25% of small and small changes in the manufacturing technology of a conventional serial sieve, does not require large expenditures.

Formula of invention

A louvre sieve containing a frame with successively arranged one after the other and a sharN | Ir: but fixed with axes with comb-shaped plates, from l; with the direction of the zooey, the movement of the grain pile 1I is placed in a checkerboard.

The source of information taken into consideration during examination:

1. Copyright certificate of the USSR

№ 388879 M. CL. F 12/44, dated 1971 (prototype).

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