Effect of end sieves on the energy and quantitative indicators of a grain crusher with an increased separating surface

Abstract

Cereals are an integral part of the feed rations of farm animals. When dry feeding, the grains are crushed. Grain grinding can be performed in various ways, such as crushing, splitting, abrasion, and impact. Different equipment is used for this purpose: roller machines, mills, gear, disk and hammer crushers, etc. In Russia, the most common method of grinding grain in hammer crushers. The advantages of hammer crushers include their high reliability, simplicity of design and maintenance, while the disadvantages are high energy consumption for grain grinding and uneven granulometric composition of the finished product. Due to these shortcomings, it is important to improve the design of crushers in order to increase their productivity and reduce specific energy consumption. We have proposed a grain crusher with an increased separating surface. To study the crusher, its structural and logical scheme and research methodology were developed. In accordance with the developed scheme, the influence of the sieve area on the quantitative and energy performance of the crusher was studied, which is the purpose of this work. The research methodology was developed and a prototype of the crusher was made. The conducted research allows us to conclude that it is necessary to change the conditions for entering grain into the grinding chamber by increasing the area of the loading window, installing a mechanism for forced grain feeding or feeding grain through the center of the rotor. The throughput of end sieves when using a rotor with straight hammers is by 2…38% higher than that of peripheral sieves.