Evaluation of agrotechnical properties of propulsion units in combine harvest-er-threshers with tires of various design

Abstract

The analysis of the carried out experimental studies has shown that when a combine harvester-thresher is equipped with the experimental tire of size 30.5E-32, it has less pressure on the soil substructure (by 11–28 %) than other options and lower voltage values in the arable horizon. As a result of testings for the impact evaluation of propulsion units in combine harvester-threshers on the soil, it has been established that GOST (All-Union State Standard) 26955-86 requires clarification of coefficients K1 and K2, which should be determined for various structural tire sizes and on different soil backgrounds, as well as the fact that when evaluating the impact of the wheel machines on soil processes it is necessary to take into account the residual normal voltages established at various depths.