Study of destruction process of linseed stems by rollers with trapezoidal teeth

The efficiency of linseed production depends on the degree of use of all components of the crop. As a result of climatic changes caused by global warming, linseed is grown throughout the territory of Ukraine. The yield of linseed stem mass in the northern regions of Ukraine is much higher than in the southern regions, reaching 45 t/ha. The presence of fiber in the linseed stems gives them elastic properties. As a result, there are difficulties with the formation of rolls. The article examines the process of interaction between the linseed stems and the trapezoidal teeth of the rollers. A methodology for studying the static destruction of a single linseed stem is proposed, and the results of experimental studies of stem destruction using a trapezoidal tooth model are presented. During the experimental studies, the factors influencing the values of static displacement and dynamic characteristics of the flax stem layer were determined. An analysis of the process of passing a single linseed stem between the rollers was carried out, and the forces acting on the stem during interaction with the rollers were determined. In order to maintain the integrity of the fiber and ensure the continuity of the stem flow during processing, studies were conducted to determine the breaking strength of the stems. The advantages of using the proposed tooth profile of the decorticator's grinding rollers were determined, and the process of flax stem destruction by the edge of the trapezoidal tooth was calculated. The results of the research show that the treatment of flax stems with the proposed trapezoidal toothed rollers makes it possible to achieve a reduction in the elastic properties of the stems and to preserve the integrity of the fibre, since the force for breaking the stems by hitting the rib of a trapezoidal tooth is lower in comparison with the breaking force. The results of the study allow us to substantiate tooth profile of the decorticator's grinding rollers of the proposed linseed harvesting machine.