Grinding Husks of Agricultural Waste in a Hammer Crusher

The disposal of waste obtained after processing agricultural crops (sunflower husks, buckwheat, millet, etc.) is a crucial problem in Russia. Recycling husks for usage in various types of production will help to solve the global environmental problem. An important operationsin the technological process of recycling husks is its grinding. The most common crushing machines in agricultural production are hammer crushers. However, their design and organization of the work process include a number of deficiencies, which leads to a decrease in productivity and significant energy consumption when crushing crop husks. The purpose of the article is to analyze the influence of design and technological factors influencing the process of grinding husks of agricultural crops through the development of a new perspective design of a hammer crusher. The developed perspective design and technological scheme of a hammer crusher with a feeding device permits the crushed material to be uniformly supplied to the hammer rotor of the crusher, thereby reducing the dynamic load on the crusher rotor shaft. In addition, the energy intensity of the grinding process was reducing and productivity was rising. To ensure stability of crushed material flow, a feeding device is used, which is a cylinder with four gutters, the opposite sides of which are rotated relative to each other. During the research, theoretical dependencies were obtained that made it possible to determine the influence of the design, operating and technological parameters of the hammer crusher on the productivity and energy intensity of the grinding process. The experimental hammer crusher allows obtaining the size of grinding 0.15… 0.4 mm at a feed rate 300 kg/h and a peripheral speed of the hammers 40 m/s.