Substantiation of flat blade parameters for soil loosening

Abstract

Layer-by-layer loosening of soil contributes to an increase in energy consumption for its cultivation. Thus, in order to reduce traction resistance, a blade with a variable crumbling angle has been developed. In the blade stand area, it is proposed to increase crumbling angle of the chisel plow by analogy with working bodies of the chisel plow to 300, and the blade wing should be made in the form of a flat-cutting blade with a small crumbling angle. To substantiate paw profile in the strut zone, a static equation of action of forces has been drawn up depending on curve shape of the front. Distribution regularity of specific soil pressures on the blade has been determined. To verify results reliability of theoretical studies, a field experiment was carried out. Behind the tractor wheel, a beam with 4 proposed blades was installed, first row blades were set to a depth of 7 cm, and second row blades, following the trail of the first blades, to a depth of 15 cm. Using method of soil sifting on sieves with round holes, structural and aggregate composition of soil was determined along the track. Maximum lump size in the traditionally treated area is 105 mm, while maximum lump size in the layer-treated area is 80 mm, which is 24% less. Use of layer-by-layer processing in the areas compacted by the tractor propellers made it possible to improve soil pulverization quality, and thereby reduce negative factors of overcompaction by tractor running system.