Abstract
Introduction. Farmers make extensive use of two-wheel tractors equipped with traction and drive interchangeable units. Two-wheel tractors are required to move evenly with minimal slip of the drive wheels on the soil. The tractive force on the drive wheels of the tillage unit is the decisive power factor in this case. An objective traction force value can be measured only by carrying out experimental studies. Materials and Methods. To determine the traction force on the drive wheels of the twowheel tractor, the design of the experimental stand was proposed and substantiated (RF patent for useful model No. 188610 “Movable module of the test stand”), and a methodology for planning and conducting a multifactor experiment to determine the traction force was developed. Results. As a result of the laboratory tests the calculation dependencies of the tractive force on the drive wheels of the Neva MB23-MultiAGRO Pro two-wheel tractor were obtained. Soil conditions, design and technological parameters, operating modes of the two-wheel tractor, and rolling resistance forces were taken into account. Discussion and Conclusion. The use of the developed regression models of the traction force under the condition of ensuring uniform movement with the minimum permissible slipping of the driving wheels of the two-wheel tractor on the soil will allow obtaining the permissible values of the two-tractor motion speed and form the zones of its most effective functioning.
Highlights
Farmers make extensive use of two-wheel tractors equipped with traction and drive interchangeable units
Design and technological parameters, operating modes of the two-wheel tractor, and rolling resistance forces were taken into account
The use of the developed regression models of the traction force under the condition of ensuring uniform movement with the minimum permissible slipping of the driving wheels of the two-wheel tractor on the soil will allow obtaining the permissible values of the two-tractor motion speed and form the zones of its most effective functioning
Summary
Farmers make extensive use of two-wheel tractors equipped with traction and drive interchangeable units. Согласно исследованиям основными критериями обеспечения высокой эффективности функционирования мотоблоков, агрегатируемых с тяговыми и тягово-приводными сменными адаптерами, являются условия их прямолинейного движения при минимально допустимом буксовании ведущих колес, основанном на условии тягового баланса [5,6,7]. Согласно рисунку 1 данное условие для почвообрабатывающего агрегата на базе мотоблока с тяговыми и тягово-приводными сменными адаптерами будет иметь вид: FТКΣ – FСКΣ – FСМ.А. Где FТКΣ – сила тяги на ведущих колесах (суммарная), Н; FСКΣ – сила сопротивления при перекатывании колес, Н; FСМ.А. Из анализа условия (1) следует, что для функционирования почвообрабатывающего агрегата необходимо обеспечить преодоление сил FСКΣ и FСМ.А. Определяющим фактором для преодоления данных сопротивлений, согласно техническому регламенту, является сила тяги FТК на ведущих колесах.
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