TECHNOLOGICAL CAPABILITIES OF CELL RELIEF TO PROVIDE THE PERFORMANCE PROPERTIES OF CYLINDRICAL SURFACES OF TECHNOLOGICAL UNITS

Abstract

The work is aimed to study the cylindrical surfaces of parts with a cellular shape surfaces, which is an elliptical paraboloid with unequal positive parameters. The hypothesis of the study is the high potential of using a cellular relief, associated with a decrease in the running-in wear of technological units, while providing the hydrodynamic bearing capacity of the lubricating layer with the shape of the relief. The objectives of the study are reduced to a parametric analysis of the behavior of the lubricating layer in a gap with a relief cell using the construction of an analytical model based on the theory of hydrodynamic lubrication. In addition, the computer fluid dynamic simulation in the ANSYS Fluent software, where the SST turbulence model is adopted to close the transport equations k–ω. It is found that the maximum hydrodynamic bearing capacity occurs at a cell depth of 0.128 mm and falls on 21/25 of the major axis of the cell ellipse. It is shown by both models, which verified their acceptable accuracy. The maximum lifting hydrodynamic pressure on one cell is also calculated, which amounted to 3 kPa. The results of parametric analysis state a significant potential for using a cellular relief to ensure the operational properties of cylindrical surfaces.