Índice de avanço cinemático sob diferentes massas no sistema hidráulico frontal e traseiro de um trator 4x2 TDA

Abstract

The kinematic advance index represents relatively the difference in driving speeds between the front and rear tires on a tractor due to the physical size difference between them, which is observed with and without the driven auxiliary front traction, being a factor important in the issue of wear of the transmission system and tires, so it is justified to identify unfavorable parameters in this sense in order to avoid them. Therefore, the work aimed to compare two constructive types of agricultural tires in different operating conditions using greases in the front and rear hydraulic system of a 4x2 TDA tractor, being the diagonal and the radial type, in order to check possible changes in a practical way in the kinematic advance index and observe which conditions are ideal for better performance, and consequently greater work efficiency, and less wear on the transmission system and tractor wheels. The practical visual measurement method was used through the claw counting and the relation of the number of turns of each wheel with the coupled and uncoupled traction, obtaining a relative index between the wheels. The index of advance had a greater variation for the diagonal tires in relation to the radial ones, the latter demonstrated a large amount of inferior results to the ideal, mainly in the use of the lower pressure with front mass combined with the non-use of the rear mass in the three-point system.