Influence of design and technological parameters of machine-tractor units on the traction and coupling qualities of a tractor when working with single-axle trailed machines

Abstract

As the previous studies have shown, the coupling weight of the driving support surfaces affects the towing and coupling capabilities of the power units acting as a tractor. This is especially important for those energy facilities in which not all support surfaces are leading, in other words, tractors with a wheel formula of 4K2. In part, this issue when moving along a horizontal surface can be solved using a device that allows redistributing part of the weight from the front non-driving support surfaces to the rear. But when moving on a surface having an angle of inclination to the horizon, this leads to a decrease in the longitudinal stability and controllability of the power units. One of the factors affecting longitudinal stability is trailed uniaxial agricultural units which act on the trailed device of the power units by transmitting a partial load. In this case, this load can be variable in the case when the mass of the trailed unit itself changes as it performs its function. It is possible to solve this problem through the use of an intermediate trolley which may regulate the redistribution of the load on the trailed device of the power unit (tractor). In this regard, studies were conducted to identify and substantiate the factors affecting the coupling qualities of the tractor when working with trailed uniaxial machines. The studies were carried out using the screening experiment method in order to determine the effect of a number of structural and technological parameters on the load on the rear driving propellers of a tractor with a wheel formula of 4K2. The experimental and theoretical studies made it possible to identify the effect of structural and technological parameters on the coupling weight of the power unit and the trailed uniaxial machine to increase the traction and coupling properties and the longitudinal stability of the power unit.