RU167409U1 - Screw feed chopper - Google Patents

Abstract

The utility model is intended for grinding agricultural products and can be used for grinding root crops, pumpkins, succulent and coarse fodder. The screw feed chopper contains a hollow body with a loading funnel, a feeding screw, each turn of which is formed by two sickle-shaped knives, an unloading window installed in the cavity of the body covered by deck. A concave-shaped two-blade knife with a sharpening angle of not more than 10 ° is installed at the end of the feed screw shaft at an angle of 90 ° to the axis. The claimed utility model significantly expand the functionality of known devices, obtain feed of various sizes, improve the quality of the crushed products and reduce the metal consumption of the structure. 4 ill.

Description

The utility model relates to the field of processing agricultural products and can be used to grind pumpkins, coarse, succulent feed and root crops.

Known small-sized farm shredder-mixer of agricultural products, including a vertical shaft with knives fixed on it and a thrower with blades enclosed in a casing with contradictions, passing into the hopper, a loading tray in the form of sidewalls and a base, as well as an outlet pipe mass [1].

Known feed chopper-mixer, which includes a vertical cutting body located in the housing, is made in the form of a screw thread with cutting edges along its periphery, and a counter member covering the cutting body. At the same time, a screw working element with a tape screw and the directions of winding and rotation opposite to the cutting body is used as a counter element [2].

However, the design solutions of known machines have low functionality and when grinding root crops, large losses of juice.

The prototype of the proposed technical solution is a screw-knife feed chopper [3].

This design contains a hollow cylinder with a loading hopper, a feeding screw, a grinding organ and an unloading window, overlapped deck.

However, the distribution of the crushed product exiting the auger channel by the size of the fragments does not sufficiently correspond to the zootechnical requirements. An additional knife, mounted at the end of the shaft (in front of the outlet), can significantly solve this problem.

Since in the process of grinding root crops under the action of centrifugal force, larger parts of beets are discarded to the periphery of the casing and exit through the discharge window, which in the total mass leads to a different degree of grinding of the product.

The purpose of the claimed utility model is to achieve a minimum change in the fractional composition of the crushed mass during the grinding of root crops.

The technical result is achieved due to the fact that the auger feed chopper, as is well known, contains a hollow body with a loading funnel, a feeding screw installed in the body cavity, each turn of which is formed by two sickle-shaped knives, an unloading window covered by a deck.

In contrast to the known device, in the proposed feed chopper, at the end of the feed screw shaft, at an angle of 90 ° to its axis, a double-bladed concave shape knife with a sharpening angle of not more than 10 ° is installed.

With this shape of the knife, the torque will change with increasing radius of the knife and contribute to regrinding of a larger fraction of beets around the periphery. In addition, unlike the known device, in the proposed chopper, the knives are mounted on one shaft 8, which reduces the metal structure.

In FIG. 1 shows a frontal section of a screw feed chopper. In FIG. 2 shows a section AA in FIG. 1. In FIG. 3 shows a section BB in FIG. 1. In FIG. 4 shape of the cutting edge of a two-blade knife.

The auger feed chopper comprises a hollow body 1 with a loading funnel 2, a feeding screw 3, each turn of which is formed by two sickle-shaped knives 4, mounted in the cavity of the housing 1, an unloading window 7, overlapped by deck 6. At the end of the shaft 8 of the feeding screw 3 at an angle of 90 ° to the axis there is a concave-shaped two-blade knife 5 with a sharpening angle of not more than 10 °.

The shape of the cutting edge of the knife 5 (Fig. 4) and its construction is determined by the following relationship:

where r _in is the radius of the shaft, m;

r _c is the radius of the cylinder, m

The presented expression allows you to build a line of the leading edge of the knife 5 with the required accuracy, since it depends only on the distance of an arbitrary point of the cutting edge from the initial line (plumb line). All other parameters are determined by the design of the grinder.

Screw feed chopper works as follows:

The root crop, coming from the hopper 2, to the feeding screw 3, where it falls under the action of the sickle-shaped knives 4, when moving to the discharge window 7, larger parts of the root crops are discarded to the periphery of the hollow body 1, are crushed with a knife 5 and exit through the through holes of the deck 6. Grinding rate governed by a deck with corresponding end-to-end sector.

The claimed technical solution is aimed at use in small farms and farms with a small number of animals. The versatility of the claimed technical solution is achieved due to the simultaneous grinding of coarse, succulent feed and root crops.

Information sources

1. A.S. No. 1831255 A3 of the USSR, MKI A01F 29/02, В02С 18/22. Small-sized farm chopper-mixer of agricultural products. / IN AND. Shipavalov, V.I. Krasnov, L.M. Beatman, Yu.S. Pleshakov, V.P. Teeth Publ. 07/30/1993. Bull. No. 28. - 4 s: ill.

2. Patent RU No. 2465764, IPC A01F 29/00, В02 from 18/08. Vertical auger chopper-mixer feed. / Goryunov S.V .; Claim November 2, 2010; Publ. 11/10/2012. Bull. No. 31. - 5 s: ill.

3. Utility Model Patent No. 142728 Universal Auger Feed Chopper. Novikov V.V., Mishanin A.L., Uspenskaya I.V., Mishanin A.L., Nikitin V.A., Kamysheva O.A. Claim 01/09/2014; Publ. 06/27/2014. Bull. Number 18. - 8 s: ill.

Claims (5)

1. Auger feed chopper containing a hollow housing with a loading funnel, a feeding screw, each turn of which is formed by two sickle-shaped knives, mounted in the cavity of the housing, an unloading window covered by a deck, characterized in that at the end of the shaft of the feeding screw at an angle of 90 ° to it the axis has a concave-shaped two-blade knife with a sharpening angle of not more than 10 °. 2. Screw feed chopper according to claim 1, characterized in that the shape of the cutting edge of the knife and its construction is determined by the following relationship:

where r _in is the radius of the shaft, m; r _c is the radius of the cylinder, m