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A Rolling Element Tribometer for the Study of Liquid Lubricants in VacuumA tribometer for the evaluation of liquid lubricants in vacuum is described. This tribometer is essentially a thrust bearing with three balls and flat races having contact stresses and ball motions similar to those in an angular contact ball bearing operating in the boundary lubrication regime. The friction coefficient, lubrication lifetime, and species evolved from the liquid lubricant by tribodegradation can be determined. A complete analysis of the contact stresses and energy dissipation together with experimental evidence supporting the analysis are presented.
Document ID
19970004458
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Pepper, Stephen V. (NASA Lewis Research Center Cleveland, OH United States)
Ebihara, Ben T. (NASA Lewis Research Center Cleveland, OH United States)
Kingsbury, Edward (Interesting Rolling Contact Walpole, MA United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1996
Subject Category
Nonmetallic Materials
Report/Patent Number
E-10309
NAS 1.60:3629
NASA-TP-3629
Report Number: E-10309
Report Number: NAS 1.60:3629
Report Number: NASA-TP-3629
Accession Number
97N12601
Funding Number(s)
PROJECT: RTOP 297-40-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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