РАСПРЕДЕЛЕНИЕ КРУТЯЩИХ МОМЕНТОВ ПО КОЛЕСАМ ТРАКТОРА

Abstract

The regularities of the distribution of torques on axles and tractor wheels have been studied. An energy-saturated universal tractor of class 2 integrated circuit LTZ-155 with all driving and steered twin wheels of the same size with tires of size 9.5-42 was chosen as the object of research. The studies were carried out under the following layout options and driving conditions: 1) rectilinear movement of a separate tractor - idling; 2) execution of the technological process during operation of the machine-tractor unit in row spacing of row crops - cultivation; 3) rectilinear movement of a machinetractor unit with guns in the transport position - idling. It was found that the total values of torques on tractor wheels under relatively constant driving conditions for all experimental races with an increase in translational speed of movement slightly, by about 5... 18%, increase due to an increase in the frequency of the dynamic impact of the microprofile from the side of the bearing surface on the wheels and fluctuations in the traction load. At the same time, the mean square deviation of the wheel moments does not exceed 18... 25% of their average value, which is constant for a stationary ergodic process. With the considered variants of operation of the machine-tractor unit, the redistribution of torques, both on the axles and on the wheels of each axle, even if we assume that a constant total torque is supplied to the driving wheels, is very complex and dynamic, due to the inaccuracy of landings due to the tolerances of the coupling in the coupling device between the tractor and the cultivator from- due to the inability to comply with the alignment of the covered and encompassing connecting elements of the connecting triangles, this leads to an asymmetry of the normal weight load of the wheels from the mounted guns and the corresponding non-proportional distribution of traction forces on the wheels.