Effect of surface texturing on lubricated contact behaviour

conference paper

English

Various micro-features were produced on rubbing surfaces to observe the effect of their shape on film thick-ness formation under rolling/sliding conditions. It was observed that the presence of deep micro-dents within lubricated contact results in film thickness reduction downstream for positive slide-to-roll ratio when the disc is moving faster than the micro-textured ball. As the depth of micro-dents is reduced this effect diminishes and mostly beneficial effect of micro-dents on film thickness formation has been observed. In case of nega-tive slide-to-roll conditions when the disc is moving slower than the micro-textured ball an increase in film thickness upstream is the predominant feature. Both transversely and longitudinally oriented grooves, even being very shallow, caused significant film thickness reduction. The size (diameter) of micro-features is also an important parameter that must be well balanced to achieve film thickness beneficial effect on film thick-ness. Larger micro-feature can supply more lubricant into the contact; however they can cause lubricant film collapse near contact side-lobes even under well lubricated conditions.

film thickness; lubrication

KŘUPKA, I.; HARTL, M.

2007

1. 10. 2007

Česká strojnická společnost

Praha

978-80-02-01963-3

Sborník 10. mezinárodní konference Tribotechnika v teorii a praxi

61

65

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