Constructive and regime parameters of horizontal impact crusher of grain materials

Abstract

In order to ensure the best digestibility of feed, all the nutrients included in their composition should be given to animals in crushed form. Particle size of feed is different for all species and age categories of animals. The most common “shock” crushers give up to 30% of the dust fraction and up to 20% of the underground one. Nowadays, impact and centrifugal-rotor grain crushers that use a “slice-chipping” are the most effective ones. The small-sized horizontal impact crusher, which constructive and technological scheme of grinding is fixed in the patents of the Russian Federation, was made for carrying out experiments. The quality of the grinding process was assessed by three different indicators (the degree of grinding, the grinding module and the actual effectiveness of the process). Data on joint and separate grinding of wheat, barley, oats and corn were obtained. The conducted multifactorial experiment showed that the proposed design of the impact crusher allows obtaining up to 98% of the finished product balanced by the particle size at specific energy costs up to 2 WH/kg and productivity up to 260 kg/h. The most rational design and operating parameters of the horizontal impact crusher for various types of grinding were established on the basis of existing standards, zootechnical requirements and the latest scientific research. The developed horizontal impact crusher can be used instead of the widely used small-sized hammer mills, since, in comparison with them, its specific energy consumption is reduced to 50%.