Lubrication of Flexible Seals with D-Shaped Cross Section for Reciprocating Motion

In order to understand the dynamic characteristics of flexible seals for reciprocating motion, the relationship between film behavior between sealing surfaces and friction characteristics is investigated based on direct observations using the optical interferometry technique. A nitrile rubber band w...

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Bibliographic Details
Published inTransactions of the Japan Society of Mechanical Engineers Series C Vol. 65; no. 640; pp. 4832 - 4839
Main Authors KANETA, Motohiro, TODOROKI, Hikari, NISIKAWA, Hiroshi, KANZAKI, Yoshiyuki, KAWAHARA, Yoshio
Format Journal Article
LanguageJapanese
Published The Japan Society of Mechanical Engineers 25.12.1999
Subjects
D-Ring
Film Thickness
Friction
Lubrication
Machine Element
Reciprocating Motion
Seal
Surface Defect
Tribology
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Summary:In order to understand the dynamic characteristics of flexible seals for reciprocating motion, the relationship between film behavior between sealing surfaces and friction characteristics is investigated based on direct observations using the optical interferometry technique. A nitrile rubber band with a D shaped cross section instead of actual D-rings was pressed against an oscillating glass plate. The effects of the length of stroke and surface defects are also examined. It has been found that even in the mixed-lubrication regime rather thick oil films are formed during the reciprocation. However, when the length of stroke is less than a certain critical value, the film completely collapses even in the hydrodynamic lubrication range and the reciprocating motion is established by the deformation of the rubber specimen. The surface defects such as dents and bumps bring about local fluctuation in film thickness downstream of these defects.
ISSN:0387-5024
1884-8354
DOI:10.1299/kikaic.65.4832