SU429779A1 - HANGERED STRAW BREAKER FOR GRAIN-KEEPER COMBINE - Google Patents

Description

one

The invention relates to the field of agricultural engineering, in particular to machines for harvesting the non-grain part of the crop.

A hinged straw chopper to a combine harvester is known, which contains a grinding machine, an apparatus and a fan, at the outlet nozzle of which a spreader is installed, its nozzle made in the form of a tray with curvilinear yushimi them on its disk. The straw, crushed by the chopping apparatus, enters the fan, the rotor blades of which are thrown onto curved rails.

In the course of experimental studies of a mounted shredder of this type, it was found that the smaller the straw stalks were crushed, the more evenly they spread around the field and better incorporated into the soil with a plow, which ultimately speeds up the process of rotting them in the soil. Therefore, when scattering chopped straw across the field, it is necessary to strive to chop the straw into smaller particles.

In a known mounted straw chopper, this can be achieved, for example, by increasing the peripheral speed of the chopping drum blades, which leads to an increase in the power consumed by the chopper, which is limited by the engine power of the combine.

The purpose of the invention is to improve the quality of grinding straw particles for more uniform distribution over the field and better placement in the soil without increasing the required power for grinding straw particles. This is achieved by the fact that curvilinear

The guides at the point of entry of the mass into the spreading nozzle are provided with cutting edges, which allows regrinding of straws by gliding cutting when throwing the mass of the fan rotor blade onto curvilinear guides, as well as by hitting the straws against the cutting edges.

FIG. 1 schematically shows a spreading nozzle mounted on the output

fan nozzle, side view and section along AA; in fig. 2 - the same, top view.

The chopped straw spreader consists of a fan 1, to the exhaust pipe 2 of which is attached, for example,

using the hinge 3, the scattering nozzle 4, made in the form of a tray, formed by the supporting sidewalls 5 and 6 and the bottom 7 with curved rails 8 fixed on it. In the upper part the nozzle is covered

using a special mechanism 10. The spreading nozzle in the lower part rests on the pipe 2 through the hinge 3, and in the upper part is additionally fixed by bolts 11.

At the point of entry of the mass into the spreading nozzle, the curved guides are provided with cutting edges, for example, interchangeable blades 12 mounted on the guides with rivets 13.

After the chopping unit, the chopped straw is fed by a button (not shown in the drawings) to the fan. The rotor blades 14 of the fan with a speed of 52 m / s throw the crushed mass onto the initial ascending upper portions of the curvilinear guides 8 equipped with knives 12. Straw stalks not placed in the working channels formed by the curved guides slide along the cutting edges of the knives , in sections B-B are cut and with the help of guides are evenly scattered across the field. The straws are crushed and cracked also at the initial moment when the stems are struck against the cutting edges.

Subject invention

A mounted straw chopper to a combine harvester containing a chopping apparatus and a fan, at the outlet of which a spreading nozzle is installed, is made in the form of a tray with curvilinear guides on the bottom, characterized in that, in order to improve the chopping and more evenly distribute the straw, The curved guides at the point of entry of the mass into the spreading nozzle are provided with cutting edges.

FIG. 2