VEGETABLE RAW MATERIALS DESTRUCTION MECHANISMS IN A ROLLER CRUSHER WITH SET PLATES IN THE FORM OF A RT-PROFILE

Abstract

The purpose of the study is to substantiate the application of a new kinematic scheme for crushing plant materials (cereals and fruit plants) to implement the design of a roller crusher with composite plates in the form of an RT-profile. To achieve the objective of research, a number of tasks were set to study the main object – the kinematic scheme of crushing. The paper examines in detail the specified crushing scheme as a static and kinematic scheme of interaction between the elements of the crusher and the crushed raw material; the possibility of combining a number of different destruction mechanisms in this scheme is noted, namely: compression, tension, abrasion, impact action; the effect of constant change in the direction and magnitude of the forces acting on the crushed material is noted; geometric and power characteristics of the new design of the roller crusher are investigated. The analysis of the new kinematic scheme of grinding allows us to draw the following conclusion: alternating loads appear in the system, ac-ting on the raw material being ground as a result of various destructive forces, which allow us to achieve an additional increase in the intensity of material (raw material) grinding and, as a consequence, an increase in the efficiency of the grinding process as a whole. The substantiation of the kinematic and force effects affecting the raw material being ground in the crushing zone is also given, taking into account the elastic-plastic properties of various types of agricultural products. The result of the analysis of the stress-strain state of the rolls in the grinding zone is given, taking into account the most unfavorable conditions of the impact of substances with different mechanical properties on the working parts of the crusher. The necessity of implementing a new grinding scheme is substantiated and design options are proposed in the form of a crusher with set plates in the form of an RT-profile.