Assessment of self-adjustment of tillage working bodies to soil conditions

AbstractAssessment of self-adjustment, that is, automatically adjusting parameters of tillage working bodies as a result of soil exposure, is an urgent task, since it is associated with the problem of developing energy-efficient tillage units. The purpose of the research is to assess the self-adjustment of typical and dynamic tillage working bodies to specific soil conditions during their functioning. The objects of research are a dynamic tillage working body with an energy-storage transmitting device and a typical tillage working body for continuous surface treatment of various soil types. The subject of research was the indicators of self-adjustment of tillage working bodies to soil conditions. During the research, methods of mathematical modeling, strain measurement of tillage working bodies, analysis and generalization of experimental data were used. The scientific novelty of the work is represented by the selected criteria for assessing the self-adjustment of working bodies and the patterns of their change from the movement speed. As criteria for assessing the self-adjustment of tillage working bodies, the following were selected: the coefficient of terradynamic resistance, the specific traction resistance per unit of its active frontal area, the number of degrees of freedom of the tillage working body and indicators for assessing the tillage quality. Based on the proposed evaluation criteria, it was experimentally established that the dynamic tillage working body developed by the authors with an energy-storage transmitting device is more efficient and adapted to changing soil conditions in comparison with a typical working body, which provides a reduction in traction resistance by an average of 20% and an increase in the degree of soil loosening by an average of 8.4-8.8% compared with typical working bodies.