THE EFFECT OF OIL POCKET ARRAYS ON FRICTION COEFFICIENT
Journal Title: Tribologia - Year 2017, Vol 274, Issue 4
Abstract
Experiments were carried out using pin-on-disc tester in conformal lubricated contact conditions for different normal loads. Surface texturing was done using abrasive jet machining with the application of laser cut mask. In order to eliminate the effect of different input variables in all the experiments, pit-area ratio and sizes of oil pockets were very similar. Five types of oil pocket arrays were tested: radial, concentric, spiral, of a square arrangement, and of a random arrangement for 5% and 17% of pit-area ratio. Different dimple diameters caused various oil pocket densities. The experiments were also made for untextured polished discs. During tests, the friction force was monitored as a function of time. Before and after tests, disc surface topography was measured using a white light interferometer Talysurf CCI Lite. The beneficial effect of surface texturing was obtained for spiral arrays of dimples on disc surface. The presence of a radial array of oil pockets resulted in the worst tribological properties of tribological assemblies containing textured discs.
Authors and Affiliations
Sławomir WOŚ, Waldemar KOSZELA, Paweł PAWLUS
Keywords
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- EP ID EP238757
- DOI 10.5604/01.3001.0010.6037
- Views 74
- Downloads 0
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