Results of experimental investigations of tractor ХТЗ-242К pulling dynamics
Abstract
The paper presents the results of traction tests of the tractor ХТЗ-242K, which are obtained using a measuring system of dynamics and power of mobile machines. The dependencies of wheel slip, theoretical, actual speed and traction power of the tractor on traction force on the hook are calculated. Dynamic properties of the tractor are largely determined by its operational and agro technical indicators, therefore, with an increase in the energy saturation of the tractor, this influence is significantly increased. The creation of promising energy-saturated agricultural tractors requires the development of research methods, as well as research in the field of tractor dynamics. It is established that the main tasks of the dynamics of the tractor can be attributed to the effective use of engine power, the movement and acceleration of the machine-tractor unit, the smooth running, torsional oscillations in the transmission. It was determined that slippage of the tractor's driving wheels is one of the negative phenomena in the interaction of the tire with the ground. To reduce slippage and improve the economic indicators of the tractor used double / three row wheels or ballasting. Experimental studies of the tractor included: preparation of equipment for research; removal of traction characteristics of the tractor ХТЗ-242K with single wheels and ballast; removal of traction characteristics of the tractor ХТЗ-242K with twin wheels and ballast; removal of traction characteristics of the tractor ХТЗ-242K with twin wheels without ballast; removal of traction characteristics of the tractor ХТЗ-242K with single wheels without ballast. The study was conducted on one agrophone. During the research, the traction force was determined on different gears, indeed the speed of movement, the slippage of the propellers, the dynamic radii of the wheels, the traction power, the trajectory of the tractor. The method of traction tests is made in accordance with GOST 7057: 2003.
