RU37450U1 - FEED GRINDER - Google Patents

Description

Feed chopper.

The invention relates to agricultural machinery, in particular to feed choppers.

Known feed chopper 1, comprising a feeder, at the output of which there is a counter element and a knife drum with knives with spiral blades fixed to it at a certain angle to the counter plate.

The disadvantage of this grinder is low productivity due to the low neck height, due to the need to ensure complete cutting of the feed layer. This leads to the fact that to increase productivity, it is necessary to install a larger number of knives, as a result of which the radius of the knife drum increases and, accordingly, the overall dimensions of the grinder.

Closest to the proposed technical dryness is the chopping unit 1 of the forage harvester 2, containing 1, the chopping unit, the drum, the crusher roller and the rector, the design feature of which is that the crusher roller has w;

The disadvantage of such a grinding apparatus is the complexity of the design and low productivity due to the low throughput of the crushing roller with the rector.

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The invention solves the problem of increasing the performance of the chopper with the same radius and location of the knives of the chopping drum.

This goal is achieved by the fact that in the proposed grinder the knives have chevron blades forming two adjacent angles t with the counter plate. This allows you to set a larger number of knives and, accordingly, more feed will be cut in one revolution of the grinding drum.

The performance of the drum feed chopper is determined by the formula

where a is the height of the neck of the chopper, m; - width of the grinder drum, m; / - cutting length, m; p is the density of the feed at the outlet of the feed rollers, k is the number of knives on the chopper drum; w the angular velocity of the drum grinder, with

The coefficient of productivity increase is numerically equal to the ratio of the number of knives with chevron blades ktu placed on the drum to the number of knives with spiral blades kc.

For knives with chevron blades

I am OD6ag // 7A: d),

for knives with spiral blades

where R is the radius of the grinding drum, m; t - the angle of inclination of the blade of the knife to the opposing plate, deg.

Then the coefficient of increase in proverbosnost is equal

k w kc Q, 5btgT + a

The value of the angle m must be in the range from 24 to 30 °, which ensures compliance with the required conditions of jamming of the feed. In addition, the axial load components arising during operation applied to the chevron blade are mutually balanced.

Significant differences of the proposed device from the prototype are that the knives of the chopping drum have blades in the form of a chevron, forming two adjacent corners with the opposing plate.

Comparison of the claimed technical solution with the prototype made it possible to establish compliance with its criterion of "novelty. In the study of other well-known technical solutions in this technical field, the features that distinguish the claimed invention from the prototype are not identified and, therefore, OSM provide the claimed technical solution with the criterion of "significant differences."

btgT + a

The listed differences of the proposed technical solution are related to the goal by a causal relationship, that is, they lead to the achievement of the goal, which is a proof of their quality.

Thus, the proposed technical solution has novelty, meets the criterion of "soup; natural differences and ensures the achievement of a positive effect, indicated by the purpose of the invention.

Other well-known technical solutions of a similar purpose with similar sushi; no obvious signs were found by the applicant.

Figure 1 schematically shows the proposed feed chopper, side view and section aa; in FIG. 2 - scan of the grinding drum with spiral blades; on fig.Z - scan grind, its drum with chevron blades.

The feed chopper includes a feeder, made in the form of a feed conveyor 1, above which a pressure conveyor 2 is installed. At the output of the feeder there is a counter plate 3 and a drum 4 with knives 5 having chevron blades 6, forming two adjacent corners with the counter plate 3.

The chopper works as follows. The feed to be chopped by the feeder moves towards the counter plate 3, clamped between the feed

conveyor 1 and pressure conveyor 2. Once in the cutting zone, the feed is crushed.

In addition, in comparison with the prototype, the proposed design of the grinder allows to reduce the diameter of the grinding drum in the case of installing the same number of knives while ensuring the same performance, and with the same performance and diameter of the drum to reduce the frequency of rotation of the drum and thus reduce the noise level.

Literary sources.

1. Patent No. 20112189, cl. A 01 F 29/06, 1994.

2. The author's certificate of the USSR No. 1804748, cl. A 01 F 29/00, 1993.

..A. Ermichev

/ -, X //.,/ N.A. Lapteva

..AND. Kupreenko

-H.M. Isaev

The authors:

1

Patentee:

V.A. Ermichev A.I. Kupreenko H.M. Isaev

ON THE. Lapteva

Claims (1)

A feed chopper, including a feeder, at the output of which there is a counter plate and a grinding drum, characterized in that the knives have chevron blades forming two angles with the counter plate.