Reduction of the influence of the undercarriage of wheeled power vehicle on soil physical and mechanical properties at rolling

Abstract

Reducing the negative impact on the soil of running systems of wheeled power vehicles remains relevant at present. This is justified by the fact that in the process of interaction of wheeled propellers with the soil, its physical and mechanical properties deteriorate: density, hardness, structural composition, etc. At the same time, after the passage of power vehicles across the field, a deep track remains that requires to be eliminated prior to full operations. As the research target, the process of soil rolling using a machine-tractor unit (MTU) consisting of a class 1.4 tractor (MTZ-80) and a rolling unit (three-link smooth water-loading roller 3SWR) was chosen. In the course of research, this MTU was equipped with a device that allowed redistributing the load between the propellers of the power vehicle and the working elements of the rolling unit. The comparison target was a serial machine-tractor unit without an installed device for load redistribution. It was found that the use of the proposed device for load redistribution allowed the following: to reduce the load on the rear wheels of the power vehicle from 2300 N to 1800 N, to reduce by 22.8%; increase the load on the working member of the rolling unit from 12.3 N to 25.2 N per 0.01 m of working width; reduce energy consumption (soil rolling) by 21.36 MJ ha as compared to serial MTU (without an installed load redistribution device); reduce the soil compaction factor along the propulsion track from 1.23 to 1.14, and the soil hardness from 0, 83 MPa to 0.71 MPa.