MATHEMATICAL MODEL OF FURROW FORMATION BY AN ELLIPTICAL KNIFE OF AN ACTIVE DRIVEN ROTARY TILLAGE TOOL
DOI:
https://doi.org/10.52269/KGTD2531159Keywords:
rotary tillage tool, mathematical model of furrow formation, elliptical knife, angle of attack, kinematic parameterAbstract
Machines and implements equipped with active rotary tillage tools are widely used in surface tillage operations. However, the furrow formation process by these tillage tools remains insufficiently studied. This work develops a mathematical model of furrow formation and investigates the technological process of furrow formation by an elliptical knife of an active driven rotary tillage tool under the following parameters: angle of attack 40º, kinematic parameter range 0.8 to 2.2. The knife of the tillage tool has an angle of deviation from the axis of rotation and is designed in the form of an elliptical blade along the major semi-axis of the ellipse. The operating element (elliptical knife) of the tillage tool, shaped along the elliptical line of the blade, forms a groove having the shape of a parallelogram geometry when viewed from above and in cross-section the shape of a part of an ellipse. At a sharp angle of attack (20-40º), this elliptical knife forms a short, narrow furrow that deviates from the travel direction of the unit, staying within the limits of the working width of the rotary tillage tool. The points of the blades of the tillage tool of both shapes move along identical trajectories in the soil. The obtained data make it possible to select the parameters of the rotary tillage tools under study, which will ensure the formation of optimal furrows. Due to this, the alignment of the furrow bottom will increase with the required agrotechnical parameters.