Results of experimental studies of a grinder with curved cutting elements

The article discusses the grinding process, which is one of the important ways of processing feed. Serially produced crushing machines, mainly of the hammer type, well-known and widely used in production. Along with the advantages, they have a number of significant distinctive disadvantages: very metal-intensive, a large proportion of the dust fraction that goes beyond the zootechnical requirements, high energy costs for the technological process. Therefore, the search continues to develop grinding machines and devices where the quality of grain dirt, as a grinding product, meets modern requirements for quality indicators. Crushers based on the method of “crushing using the so-called “pinched” impact of the blade on the grain” are worthy of attention. The authors propose a grinder design with curved cutting elements developed and tested in production conditions. Based on the research results, the working parts of the grinder with optimal cutting angles are recommended: for the first stage the value is β = 30°; for the second stage - β = 35°. Presumably, such values of the cutting angles of the cutting elements will make it possible to achieve an increase in the uniformity of the granulometric composition of the finished grinding product and the likelihood of reducing energy costs for the technological process. The results of experimental studies of the proposed feed grain grinder with curved cutting elements are presented. It was established that “for the proposed grinding method, the specific energy intensity decreased by an average of 11.9%, the uniformity of the granulometric composition of the finished product increased by 5-10%, the amount of dust fraction decreased by 10-15% and there are no whole grains in the finished product.” The presented experimental results convincingly confirm the prospect of “using the so-called crushing method of a “pinched” impact with a blade on a grain” [10].