DefinePK

Abstract

The work is devoted to the development of the technique for choosing the optimal shape of the curved working part of the tooth of the harrow of the Striegel" type. As a criterion of technical and economic efficiency of the application of the curved tooth of the harrow, the area of the projection of the tooth shape is considered taking into account the angle of possible deviation. The task was to find out from the experimental studies obtained how a significant amount of weed plants are destroyed when the force reaches a certain value and at what values of the force the tearing off of the stems and pulling out of the winter wheat occurs. According to the model of the process of removing weeds of weeds, the spring tooth must overcome resistance without longitudinal bending. On the basis of the data obtained, the authors developed a mathematical model characterizing the dependence of the projection area of the tooth shape on the radius of its curvature and the angle of rotation in the soil, a model characterizing the force exerted on the soil from the radius of curvature of the bend of the harrow tooth and the possible tooth deflection in the soil and the model characterizing limiting efforts on the roots of winter wheat, depending on the degree of development of the root system and soil moisture. On the basis of the models obtained, an algorithm is proposed for selecting the optimal geometric shape of the curved part of the tooth of the barrel harrow, depending on the development of the crops and soil moisture.