RU211524U1 - Chopper Rotor Impact Body - Google Patents

Abstract

The design of the impact body of the chopper rotor in the form of a monolithic hammer and the principle of operation of the feed chopper are described. To reduce the specific energy consumption and increase the efficiency of the technological process of grinding concentrated feed, less energy-intensive grinding methods are used: “chipping - shearing”, “free impact - abrasion”, due to the installation of monolithic hammers, cast in the form of a hemisphere with six sharp cutting edges. Such a design of the monolithic grinder hammer allows the use of several grinding methods. 4 ill.

Description

The utility model relates to devices for grinding feed, in particular to hammer mills, and can be used for grinding concentrated feed when feeding animals and birds in agriculture.

Known working bodies described in [1], which presents the designs of hammers used in various crushers and grinders when grinding feed. The greatest application was received by the lamellar step normal hammers accepted as analog.

The disadvantage of these hammers is the rapid and uneven wear of the working faces of the hammers, which leads to dynamic unbalance of the hammer drum, a decrease in crusher productivity and an increase in the energy intensity of the grinding process.

The closest in technical essence and achieved technical solution is the device chosen by us as a prototype, described in patent No. 2478008 of the Russian Federation and published on March 27, 2013. Bull. No. 9. "Monolithic hammer of a universal feed chopper" [2].

The disadvantage of this hammer is that the impact working surface of the monolithic hammer is made in the form of a trihedral prism with two sharp cutting edges, which allows grinding the grain material only by the “chipping-cutting” method, which is ineffective when grinding concentrated feed.

The purpose of this utility model is to reduce the energy intensity of the grinding process and increase the efficiency of the technological process of the grinder by using an impact body in the form of a hemispherical monolithic hammer with six sharp cutting edges located along the impact working surface along the entire length of the hammer, parallel to the axis of rotation of the rotor, which is installed in the grinding chamber grinder.

This goal is achieved in that the impact working surface of the monolithic hammer is made in the form of a hemisphere with six sharp cutting edges located along the impact working surface along the entire length of the hammer, parallel to the axis of rotation of the rotor. Sharp cutting edges allow the use of the least energy-intensive methods of grinding materials: the "chipping-cut" method and the hemispherical shape of the hammer allows the use of "free impact - abrasion" when grinding grain material by copying the surface of the working chamber.

Monolithic grinder hammer (Fig. 1, 2) characterized by the fact that it consists of two racks 1 and impact working surface 2, and the impact working surface is cast in the form of a hemisphere with six sharp cutting edges 3, allowing grinding by the "chipping-cut" method and "free blow - abrasion" when grinding grain material, while sharp cutting edges are located along the impact working surface along the entire length of the hammer.

A chopper with rotor percussion bodies in the form of monolithic hammers (Fig. 3, 4) consists of a body 4 with a working chamber 5, in which the rotor 6 is located with monolithic hammers pivotally suspended on its axes 7, a deck 8 and an unloading pipe 9. For grain supply a receiving hopper 10 is installed in the grinding chamber on the body, which is connected to the grinding chamber by means of a neck 11. At the entrance to the neck there is a control damper 12 for dosing the grain material, the grain is fed by gravity tangentially along the direction of rotation of the rotor. The grinder shaft is driven by a single-phase flange motor 13 with a power of 1.1 kW. The shredder body is mounted on a three-bladed stand 14.

The grinder works as follows. Cleaned from foreign and metallic impurities, the feed grain is loaded into the receiving hopper 10 and through the control valve 12 enters the neck 11. Then, by gravity, tangentially in the direction of rotation of the rotor, it is directed to the grinding chamber 5. In the grinding chamber, the grain falls under the impact of a monolithic hammer (grinding method " blow in flight") and receives partial destruction (microcracks). Partially destroyed grain acquires an acceleration directed perpendicular to the fixed edge of the deck 8, where it is completely destroyed between the sharp cutting edges of a monolithic hammer and the sharp edges of the edges of the fixed deck (methods: "chipping-cutting", "free impact - abrasion"). The crushed grain turd is taken out through a window of an unloading branch pipe from the crushing chamber. Depending on the given zootechnical requirements for the quality of the resulting product for different species, groups and ages of animals and birds, two, three or four monolithic hammers are installed on the rotor.

Thus, the use of the impact body of the grinder rotor in the form of a hemispherical monolithic hammer with six sharp cutting edges, made along the impact working surface along the entire length of the hammer, parallel to the axis of rotation of the rotor installed in the grinder, makes it possible to reduce the energy intensity of the process through the use of the least energy-intensive grinding methods. "chipping-cutting", "free impact - abrasion" for grinding concentrated feed and increase the efficiency of the grinding process by installing two, three or four monolithic hammers on the rotor, depending on the given zootechnical requirements for the quality of the resulting product for various species, groups and ages of animals and birds.

The source of information

1. Melnikov S.V. Mechanization and automation of livestock farms. - L .: Kolos. Leningrad. Department. 1978, p. 102-106. (Textbooks and textbooks for higher educational institutions).

2. Patent for the invention RU 2478008 C2 MPK B02S 13/28 Monolithic hammer of a universal feed grinder / Shagdyrov I.B., Baldanov M.B., Sordonova M.N., Mitrofanov E.A. / applicant and patent holder Buryat State Agricultural Academy named after V.I. V.R. Filippova (RU). - No. 2011108145/13; dec. 03/02/2011; publ. 03/27/2013. Bull. No. 9.

Claims (1)

The impact body of the grinder, made in the form of a hemispherical monolithic hammer, is characterized by the fact that it consists of two racks and an impact working surface, moreover, the impact working surface is cast in the form of a hemisphere with six sharp cutting edges, allowing grinding by the method of "chipping - shearing" and "free impact - abrasion" when grinding grain and lumpy materials, while sharp cutting edges are located along the impact working surface along the entire length of the hammer.

Images