Determination of optimal design and technological parameters of a hammer crusher with sieves in end surfaces

When preparing compound feeds, the main machines used for grain crushing are hammer crushers. To obtain a better-quality finished product with lower energy costs, it is necessary to determine the optimal design and technological parameters of a hammer crusher. To this end, the laboratory of livestock production mechanization has designed a hammer crusher with sieves in the end surfaces. The hammer crusher has adjustable cross-sections of the sieve holes, so there is no need to replace the sieves. Experimental studies have been carried out at the production facilities of the North-East Federal Agency of Scientific Institutions to determine the impact of changes in structural and technological parameters of the crusher on its main performance indicators. According to the results of experimental studies, mathematical models of the working process of the hammer crusher have been obtained. As a result, the optimal design and technological parameters of the hammer crusher have been determined: the area of the sieve openings 58.6 мм²; the height of the material separation ring 40 mm and the size of the air filter area 6 m², while the throughput capacity of the crusher is 1.23 t/h, specific energy consumption is 3.44 kWh/(t×units of fineness degree), the average size of crushed particles is 1.45 mm, the share of whole grains in the finished product is 0.17%.

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