Abstract
The main condition for feed preparation is to ensure the high quality of the finished product. At the sametime, it is necessary to increase the efficiency and durability of the feed chopper by optimizing its design parameters,taking into account the physical and mechanical properties of the processed material. The authors studied the technologicalprinciple of crushing root and tuber crops. The paper considers the operation of an industrial rotary feed chopper whenprocessing beets and carrots. The experiment planning method is applied. The strength characteristics of the grinderelements were checked during design (selection of the shape and sharpening angle of knives) and verificationcalculations for strength (assessment of the strength characteristics of knives). The authors show the influence of the main geometric parameters of the working implement of the grinder – the knife inclination and the sharpeningangle of the knives – on the preparation of high-quality feed. It was revealed that the sharpening angle of the grinderknives should be calculated depending on the friction coefficient of the initial material against the grinder body, aswell as the type and properties of the supplied material. Based on the data obtained during the laboratory experimentand simulation modeling, in order to achieve greater versatility with the feed chopper, a combined shape of the cuttingedges of the knives was chosen – that with a straight and serrated cutting edge of the chopper. Samples of cutting edgesat 30x magnification, obtained using an instrumental microscope MMI-2, showed that the optimal shape of the knifeis a wedge with a double escapement
Published Version
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