Planning of service measures for hammer crushers of “Altai” feed preparation plants

Abstract

At present in livestock farming, hammer crushers with horizontal rotor arrangement are widespread for feed preparation. These are energy-intensive and metal-intensive devices with high productivity; during their operation there is intensive wear of working bodies – hammers; and other parts fail periodically: bearings, axles, sieves, electric motors, etc., which leads to inevitable stoppages of equipment, reduced product quality, and increased operating costs. Therefore, planning of service activities to improve reliability of hammer crushers, increase their overhaul interval, reduce the labor intensity, etc., is an urgent task. The original feed crushers with vertical rotor arrangement, developed by scientists of the Altai State Agricultural University, including the model DM-3.5, installed on feed preparation plants “Altai”, have certain advantages over traditional hammer crushers. As practice shows, crushers of such design are characterized by the following failures: bearing failure, deck wear, electric motor malfunction, coupling breakage, vibration and runout of the bearing shaft, backlash or axial movement of the shaft in the support, difficult shaft rotation, wear of working tools (hammers), etc. Based on the experience of operation of such crushers on the farms of the Altai Region, we propose a set of measures to increase the overhaul interval, plan the timing and change the content of maintenance, improve the technology of maintenance and repair, etc. which increases the reliability of these plants.