ОБҐРУНТУВАННЯ ПОКАЗНИКІВ КОЛІСНИХ СИСТЕМ ТРАКТОРІВ КЛАСИЧНОЇ КОМПОНОВКИ

The article provides a justification for the approach to determining the indicators of wheel systems of MFWD tractors, including their coordination with the level of ballasting, distribution of power flow across the drive axles, ensuring the required level of kinematic lead in the tire-soil contact zone, ensuring the fulfillment of agroecological requirements regarding the permissible level of maximum soil pressure of wheel systems, implementation of a justified combined dual/triple tires and ballasting of agricultural wheeled tractors. A method is proposed for determining the maximum degree of tractor ballasting and distributing the mass of ballast weights for installation in the rear wheel disks and on the front linkage of the tractor. The effectiveness of the combined use of front/rear tire doubling and appropriate tractor ballasting is shown. The possibility of increasing tractor efficiency is shown using the example of a 250 kW tractor. The wheel system with front single tires and rear dual tires when ballasted allows for increased efficiency in terms of net productivity up to +84%, fuel consumption per hectare up to -15% while ensuring maximum ground pressure at the level of a tractor with all single tires (128 kPa). The wheel system with front and rear dual tires when ballasted allows for increased efficiency in terms of net productivity up to +109%, fuel consumption per hectare up to -19% while ensuring maximum ground pressure of up to 107 kPa.