Abstract
The article deals with the problem of reducing energy consumption when moving mobile power sources on deformable support bases. On basis of experimental studies using test-bench equipment, the main output parameters of 1020x420-18 tire of Bel-79 model were determined. Analysis of the results obtained made it possible to determine an optimal range of intra-tire pressure, when the realized propulsive efficiency takes maximum values, and energy consumption for selfpropulsion is minimal.
Highlights
The use of wheel propellers with low intra-tire pressure in the structures of various mobile power sources for agricultural purposes is based on their high environmental compatibility when driven on waterlogged and weak soils.Due to large overall dimensions and high relative deformation of such tires, a significant decrease in the values of contact pressures at the tire-soil border is provided and the track depth decreases after the passage of the wheel, resulting in the reduction of power losses for rolling and rutting
In the works of various scientific teams [1, 2] it was noted that with a decrease in the internal air pressure in the tire, there is a progressive increase in hysteresis losses, which in turn leads to an increase in power losses for wheel rolling
In [3], it is noted that when a highly elastic tire moves on deformable soil, there is a range of optimal intratire pressure, at which the total rolling resistance becomes minimal, and the propulsive efficiency takes maximum values
Summary
The use of wheel propellers with low intra-tire pressure in the structures of various mobile power sources for agricultural purposes is based on their high environmental compatibility when driven on waterlogged and weak soils.Due to large overall dimensions and high relative deformation of such tires, a significant decrease in the values of contact pressures at the tire-soil border is provided and the track depth decreases after the passage of the wheel, resulting in the reduction of power losses for rolling and rutting. In the works of various scientific teams [1, 2] it was noted that with a decrease in the internal air pressure in the tire, there is a progressive increase in hysteresis losses, which in turn leads to an increase in power losses for wheel rolling. In [3], it is noted that when a highly elastic tire moves on deformable soil, there is a range of optimal intratire pressure, at which the total rolling resistance becomes minimal, and the propulsive efficiency takes maximum values. The issues of assessing the influence of operating modes of ultra-low-pressure tires on its energy consumption during rolling have not been studied enough
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