INVESTIGATION OF THE PRESSURE DISTRIBUTION ON THE BLADES OF A ROTARY SOIL RIPPER BY SIMULATION MODELING

The introduction of minimal tillage technologies requires the search for new designs of energy-saving equipment. The use of rotary leavening agents for surface tillage to the depth of seeding has a number of advantages in comparison with traditional tools both in terms of energy intensity and stress on the soil. The purpose of the study is to establish the nature of the distribution of soil pressure on the blades of a rotary ripper by simulated loading. To achieve this goal, a simulation method was used to simulate the loading of rotary ripper blades by the soil environment. The values of the normal pressure at different points of the friction surface of the blades during their movement in a circular soil channel were determined. The values of the normal pressure were determined indirectly by measuring the amount of wear at different points on the surface of the blades. Previously, an easily removable material was applied to the friction surface and the intensity of its abrasion was measured using the magnetoinduction method. The trajectory of the blade blade in the soil is described by the trachoid equation, while the loosening process itself is similar to "digging" and is divided into two stages: deepening and hollowing with the movement of part of the loosened soil to the surface of the field. The equation of movement of the blade in the soil is obtained depending on the angle of its rotation: from the beginning of the excavation to the excavation. A theoretical dependence of the loading pattern of the blade during movement in the soil is obtained. As a result of the simulated loading of the blades, the intensity of abrasive wear was measured at different points of the friction surface and the corresponding regression equations were obtained, which allows us to judge the nature of the external loading of the ripper blades. Thus, cutting the soil when loosening it with a rotary ripper occurs with three cutting edges: the lower blade and two side edges of the ripper blade, which characterizes the peculiarity of soil movement along the working surface of the blade. In the production of rippers, provision should be made for the necessary wear resistance of the lower and side edges of the blades by hardening them.