Laboratory field experimental studies of bridge agricultural unit

Abstract

Goal. To assess the technical implementation and production efficiency of bridge mechanization for the track system of agriculture in the technological processes of tillage and application of technological materials (on the example of an agricultural tool with a developed design). Methods. Experimental studies were performed according to both conventional and developed methods using a modern strain gauge and control measuring equipment with the analog-to-digital conversion of signals from information sensors. Results. According to the results of experimental studies of the bridge agricultural unit as a part of agricultural tools for surface tillage, high adaptability to the implementation of technological processes for tillage has been proved. Comparative graphs are built of normalized correlation functions and normalized spectral densities of profiles of irregularities of traces of a constant technological track and profiles of irregularities of agrophones after the passage of a toothed harrow, as well as a S-shaped spring ripper, and also a rotary harrow. Based on them, it is established that the work of agricultural tools for surface tillage has a good effect on the nature of the non-uniformity of oscillations of their traction resistance. Conclusions. The main generator of the formation of irregularities of the longitudinal profile of the soil traces of the constant technological track is the parameters of the soil hooks of the tires of the wheels of the bridge agricultural unit. The oscillations of the irregularities of the profiles of the treated agrophones by the bridge agricultural unit with attached agricultural tools (S-shaped spring ripper and rotary harrow) are smoother as a result of the movement of the agricultural unit along the compacted traces of a constant technological track. The quality of tillage with units based on bridge agricultural unit is approximately the same as in similar traditional machine-tractor units. But the specific energy consumption per 1 ha of the cultivated area with new units is lower by 40%.