Research into the perforated surface of the double staged grinder-crusher

Abstract

Abstract One of the main ways to increase the productivity of livestock is to feed them with mixed feeds, namely feeds obtained by processing feed grains. Based on this, a constructive and technological scheme for the device for small-scale livestock farms such as maize and other cereals, namely rye, oats, wheat, barley, was developed. On this principle, a two-stage grinder with a fixed blade in the upper chamber and movable hammers in the lower chamber, which performs the work process, was developed, and its upper chamber hole surface dimensions were theoretically and empirically studied. It was found that Nm = 137.5 holes with a diameter of 20 mm are required for the exit of crushed pieces from the crushing chamber under ideal conditions when crushing a piece of corn-cob. In the experiments, the optimum granulometric composition of the primary crushed product was obtained when the holes of the crushing chamber were studied by changing the holes from 10 to 30 mm. According to theoretical calculations, when the holes had a diameter of 20 mm, the optimum granulometric.