Justification of rational scientific methods of acquisition tractor units as part of the tractor with a continuously variable transmission

Abstract

Acquisition, or as it is often called, unitization, is primarily reduced to finding the optimal relationship between the kinematic parameters of working machines and high-speed modes of operation the tractor engine. Overall conclusion about the correctness of the choice of a particular transmission is needed to meet the maneuvering characteristics of the tractor and kinematic parameters of working machine. With increasing width of the unit increases in proportion to its performance, and for sowing machines, sprayers and some other higher quality of work, due to the reduction of the size of a field which is exposed to navigation systems. This working width is limited on one side by the power of the engine of the tractor and deterioration of maneuverability on turns and crossings. The speed of movement of the unit must be installed with quality work. In many cases, the speed, which is determined by emergency cheese tractor cannot be implemented due to agro-technological or physiological limitations. Economic speed limit machine units due to a change in energy consumption for the execution of operational reliability of machines in the unit, as well as some deterioration in the use of time shifts. In each case high-speed modes of operation need to be clarified with respect to physical and mechanical soil properties, surface conditions, field, phases of plant development, soil moisture and other factors that affect the quality of the work. The rational combination of working width and speed of the unit depends mainly on the technical and economic indicators of work.