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Solid lubrication design methodology, phase 2The high temperature performance of solid lubricated rolling elements was conducted with a specially designed traction (friction) test apparatus. Graphite lubricants containing three additives (silver, phosphate glass, and zinc orthophosphate) were evaluated from room temperature to 540 C. Two hard coats were also evaluated. The evaluation of these lubricants, using a burnishing method of application, shows a reasonable transfer of lubricant and wear protection for short duration testing except in the 200 C temperature range. The graphite lubricants containing silver and zinc orthophosphate additives were more effective than the phosphate glass material over the test conditions examined. Traction coefficients ranged from a low of 0.07 to a high of 0.6. By curve fitting the traction data, empirical equations for slope and maximum traction coefficient as a function of contact pressure (P), rolling speed (U), and temperature (T) can be developed for each lubricant. A solid lubricant traction model was incorporated into an advanced bearing analysis code (SHABERTH). For comparison purposes, preliminary heat generation calculations were made for both oil and solid lubricated bearing operation. A preliminary analysis indicated a significantly higher heat generation for a solid lubricated ball bearing in a deep groove configuration. An analysis of a cylindrical roller bearing configuration showed a potential for a low friction solid lubricated bearing.
Document ID
19870009037
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Pallini, R. A. (SKF Industries, Inc. King of Prussia, PA, United States)
Wedeven, L. D. (SKF Industries, Inc. King of Prussia, PA, United States)
Ragen, M. A. (SKF Industries, Inc. King of Prussia, PA, United States)
Aggarwal, B. B. (SKF Industries, Inc. King of Prussia, PA, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1986
Subject Category
Urban Technology And Transportation
Report/Patent Number
NAS 1.26:175114
AT86D002
DOE/NASA/0323-2
NASA-CR-175114
Accession Number
87N18470
Funding Number(s)
CONTRACT_GRANT: DEN3-323
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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