SU1644802A1 - Fodder stalk shredder - Google Patents

Abstract

The invention relates to agriculture, in particular to machines for grinding stalk feeds on livestock farms. The purpose of the invention is to increase the reliability and reduce the energy consumption of grinding. The shredder consists of a drum 1 with knives 2, a casing 3. feed 4 and discharge 5 conveyors. Each knife 2 is made in the form of a plate bent in a transverse drum with cutting blades on straight 6 and bent 7 sections. The plates have a triangular cutout 8, made behind the straight section 6 in the direction of rotation of the drum 1. One of the faces of the cutout 8 is located at an angle to the tangent at the point of intersection with the drum circumference equal to the sliding angle of the blade of the knife 2 along the material. The plot is shifted to the axis of the drum 1 relative to the tip of the blade of section 6 by the value of d, determined by the correlation-V divided by the relation -P where V is the feed rate of the material to the drum, m / s; n is the drum rotation frequency, 1 / s; p is the angle between the top of the bent portion and the point of intersection of the blade of the straight portion with a circle passing through the top of the bent portion, degrees. Knives 2 are placed in a cylindrical spiral on the surface of the drum 1 with the direction of the sections 7 alternately in opposite directions. The feed monolith is fed by the conveyor 4 to the drum 1 and transferred by the knives 2. The cut feed particles are dropped onto the conveyor 5. This increases the reliability and decreases the energy intensity of the grinding of 1 Cpf, 4 Il. sl C o 4 E § 5 Fiie1

Description

The invention relates to agriculture, in particular to machines for grinding stalk feeds on livestock farms.

The purpose of the invention is to increase the reliability and reduce the energy consumption of grinding.

1 shows a feed chopper, side view; figure 2 is the same, top view; on fig.Z - knife, side view; figure 4 is the same, top view.

The chopper of stalk feed consists of: drum 1 with knives 2 mounted in a cylindrical spiral, mounted above drum 1 of casing 3, feeding 4 and taking out 5 conveyors. Each knife 2 is made in the zide of a plane bent in a transverse drum with a cutting blade MOM 8 and bent 7 sites. The plates have a triangular cutout 8, made behind the straight section 6 in the direction of rotation of the drum 1. One of the faces 9 of the cutout 8 is located at an angle to the tangent at the point of intersection with the drum circumference equal to the material slip angle t of the blade 2. The portion of the plate is offset to the axis of the drum 1 relative to the tip of the blade of portion b by an amount d determined by the ratio

l DSL /

° y-n

where V is the feed rate of the feed stalks to the chopping drum, m / s;

n is the drum rotation frequency, 1 / s;

p is the angle between the top of the bent section and the point of intersection of the blade of the straight section with the circle coming through the top of the bent section, degrees.

The knives 2 are arranged in a cylindrical spiral on the surface of the drum 1 with the direction of the bent sections 4 7 alternately in opposite directions.

The grinder works as follows.

Aft monolith, for example bales of pressed straw, is fed by the conveyor 4 to the rotating drum 1. The knives 2 located on the drum are successively cut into the stem mass, making longitudinal-transverse cuts. First, the straight section 6 of the knife 2 cuts into the monolith at a sliding angle, followed straight through it, after a period of time necessary for turning at an angle (p, cutting in the transverse plane at a sliding angle r bent section 7. Deformed at

the bend section of the transverse cutting edge is closed by the apex of the straight section b, which reduces the energy consumption for cutting off the feed particles. The alternating arrangement of knives with the opposite direction of the bent portion 7 ensures uniform distribution of forces over the entire surface of the drum and eliminates the occurrence of axial forces. A uniform cut-off of portions of food is ensured along the entire front of the interaction of knives with a layer of food, which is necessary when grinding pressed feeds with simultaneous distribution to animals in the feeders. The feed layer that has been cut off and, accordingly, freed from pinching in the monolith, is dropped by knives onto the conveyor 5 and retracted for further use, for example, it is discharged into animal feeders. The casing 3 serves to limit the zone of variation of the feed with the drum 1 when unloading onto the conveyor 5.

Claims (1)

Invention Formula 1, A stalk feed chopper containing a drum with knives made in the form of flat plates bent in the transverse axis of the drum with a blade on the straight and bent sections, characterized in that, in order to increase reliability and reduce the energy intensity of grinding, the plates have a triangular cutout made behind the straight section in the direction of rotation of the drum, while one of the edges of the cut is at an angle to the tangent at the point of its intersection with the drum circumference equal to the angle of sliding of the blade of the knife along the material, and bent the plate portion is offset with respect to the drum axis vershiny forward portion of the knife blade on value determined by the relation , 5 30ЈЛ / -п where V is the speed of the conveyor belt that supplies feed to the chopping drum, m / s; n is the drum rotation frequency, 1 / s; p is the angle between the top of the bent section and the point of intersection of the blade of the straight section of the knife with a circle passing through the top of the bent section, degrees. 2, Grinder pop. 1, characterized in that the knives are mounted on the surface of the drum in a cylindrical spiral, and the bent sections are alternately directed in opposite directions, $ Mf DHogodog wo 1Shch - 9 Z08frfr9l 4