LABORATORY EXPERIMENTAL STUDY OF THE TRACTION CHARACTERISTICS OF AN “AUTO-TRACTOR” BASED ON AN OFF-ROAD VEHICLE
ЛАБОРАТОРНЕ ЕКСПЕРИМЕНТАЛЬНЕ ДОСЛІДЖЕННЯ ТЯГОВИХ ВЛАСТИВОСТЕЙ “АВТОТРАКТОРА” НА БАЗІ АВТОМОБІЛЯ ВИСОКОЇ ПРОХІДНОСТІ
DOI : https://doi.org/10.35633/inmateh-78-117
Authors
Abstract
The relevance of the study stems from the need to substantiate the traction-adhesion and traction-speed characteristics of a new type of mobile power unit designed to perform transport and technological operations involving the aggregation of agricultural machinery coupled with tractors of traction classes 1.4–2. The aim of the work was to experimentally determine the influence of mass and transmission operating modes on the traction force, the drive wheel slip coefficient and the speed of the multifunctional mobile power unit “Avtotraktor”. Experimental studies of the machine’s traction characteristics on an asphalt concrete surface were conducted for two MEZ mass variants – without additional load and with installed ballast – using statistical methods for data analysis. Based on the research results, regression relationships were established between the slip coefficient and speed of movement as a function of traction force for various transmission operating modes. It was found that ballasting the “Avtotraktor” significantly reduces slip across the entire range of traction forces and enhances the efficiency of the machine’s traction potential. Rational ranges for the use of first and second gears have been determined depending on the magnitude of the tractive effort. It has been experimentally confirmed that, under ballast conditions and with the correct selection of transmission operating modes, the “Avtotraktor” meets the requirements for mobile power units of tractive classes 1.4–2. The results obtained can be used in the further improvement of the design of “Avtotraktor”-type mobile power units, as well as to justify their operating modes during transport and technological operations in agricultural production.
Abstract in Romanian



