Abstract
Existing grain shredders have disadvantages, the main of which are the following: high metal and energy consumption, uneven granulometric composition of the crushed product, high percentage of pulverized fraction, rapid wear of working bodies, product heating. To eliminate the disadvantages, the design of a rotary-centrifugal grain shredder is proposed. The presented design requires optimization of a number of structural and kinematic parameters. To solve this problem, the method of a multifactor experiment was chosen. The feed of grain material, the rotor speed, the opening of the separating surface, and the number of knives on the inner and outer rings were taken as factors that varied at two levels. As optimization criteria, the plant performance, power consumption during grain grinding, and compliance of the resulting product with zootechnical requirements were considered. As a result of data array processing, adequate and reliable mathematical models were obtained. As a result of model analysis, the influence of factors on optimization criteria was established.
Highlights
Feed intended for animals must be prepared in accordance with zootechnical requirements
The most significant influence on the energy consumption y1 is exerted by factor x1, followed by factors x3 and x5
An increase in the grain feed x1 increases the power consumption y1, an increase in the opening value x3 and a decrease in the number of knives on the outer ring x5 leads to a decrease in the power consumption y1
Summary
Feed intended for animals must be prepared in accordance with zootechnical requirements. When preparing feed mechanically, grinding is mandatory. Grinding is considered more energy-intensive and labor-intensive operation, which takes up more than 50% of the total labor costs in the preparation of compound feeds. The development, research and creation of an optimal and efficient way to grind grain feed encourages many researchers to create new designs for shredders [1,2,3,4,5,6]. The resulting scientific task is to improve the most efficient machines for grain crops grinding, one of which is a centrifugal-rotary shredder. The purpose of the research is to reduce the specific energy consumption of forage grain grinding and increase the uniformity of the granulometric composition of the finished product by improving the main design parameters of the centrifugal-rotary shredder
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