Influence of degree of abrasive particle clinging to wear mechanism of soil-cultivating machines operational mechanisms
DOI:
https://doi.org/10.31548/machenergy2020.02.035Keywords:
operational mechanism, soil-cultivating machine, abrasive particle, soil, surface, wear mechanism.Abstract
While the machine parts operate in the composite heterogeneous environment (soil), the following complex processes occur on the friction surface: mechanical, chemical, physical, and thermal. The ratio between the intensity of these processes defines the mechanism of abrasive wear of the surface of the soil-cultivating machines operational mechanisms. In the overwhelming majority of cases, while the soil-cultivating machines operational mechanisms interact with the soil, the intensity of mechanical processes prevails over the intensity of all other processes combined. One of the main factors influencing the intensity of mechanical processes in the area of friction contact between the ground and the surface of soil-cultivating machines operational mechanisms is the degree of an abrasive particle clinging.
The influence of the degree of an abrasive particle clinging in the soil to the mechanism of abrasive wear of the surface of the soil-cultivating machines operational mechanisms is theoretically determined. As the degree of an abrasive particle clinging increases, the area and depth of plastic deformation enlarge, and the probability of metal separation (micro-cutting) from the surface of the soil-cultivating machines operational mechanisms increases.
Field explorations were carried out on sandy soils within the Ovruch district of the Zhytomyr region. UDA-4.5 universal disc unit, the operational mechanisms of which were made of 65H steel, was used for the explorations. During the explorations, a considerable limitation of micro-cutting signs on the friction surface, as well as reduction of the degree of an abrasive particle clinging were noticed. Field explorations completely confirm theoretical statements.
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