Determination of indicators affecting the cross-country capacity of machine-tractor units

Abstract

This study provides an assessment of the traction-coupling qualities of the machine-tractor unit consisting of the Belarus 1221 tractor and the Unia MX1600 mineral fertilizer dispenser. The quantitative evaluation is carried out through the cross-country coefficient. The characteristic of cross-country capacity with different soil conditions on the horizontal section is shown, and it is established that during operation on feeding along seedlings the machine has a sufficient cross-country capacity. At operation on rough relief the passability at speeds up to 8 m/s decreases by 25%. The cross-country ratio depends on the internal tyre pressure. With a drop in pressure from 1.8 to 0.8 kg/cm2, there is an increase in cross-country capacity on any kind of soil. In general, it has been found that the machine-tractor unit has a sufficient reserve of cross-country capacity.