COMPARISON OF METHODS OF OIL CAPACITY CALCULATION

Wieslaw Grabon, Pawel Pawlus, Rafal Reizer

Abstract

The aim of this work is to compare various methods of oil capacity calculation for surfaces with isolated pockets. These surfaces were measured by stylus profilometer. In reference method, oil capacity was calculated by summation of volume contained in all the separate dimples from measured surface. Oil capacity was calculated also on the basis of material ratio curve using the Svk and Sr2 parameters from the Sk group (areal extension of ISO 13565-2 standard). The second procedure was developed on the basis of Sq parameter group (areal extension of ISO 13565-3 standard). The third method is bases on determination of point of maximum curvature of the normalized material ratio curve. It was found that in most cases it is possible to obtain correct values of oil capacity using the Sk family parameters. However when the slope of material ratio curve in its middle part is small or high, the errors of oil capacity estimation using this approach may be large. In this case the other methods gave better results.

Keywords

surface topography, oil capacity, surface texturing

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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