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Design considerations in mechanical face seals for improved performance. II - LubricationThe importance of sealing technology in the U.S. industrial chemical-orientated society in regard to maintenance and environmental contamination is pointed out. It is stated that seal performance (leakage, life) is directly related to seal lubrication, which is a mechanism not well understood. Current thinking in regard to seal lubrication is reviewed, the effect of energy dissipation in the thin lubricating film separating the sealing faces is pointed out, and the results of vaporization due to heating are illustrated. Also, hydrodynamic lubrication is reviewed, and an inherent tendency for the seal to operate with angular misalignment is pointed out. Recent work on hydrostatic effects is summarized and the conditions for seal instability are discussed. Four different modes of seal lubrication are postulated with the mode type being a strong function of speed and pressure.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Ludwig, L. P.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Greiner, H. F.
(Sealol, Inc. Providence, R.I., United States)
Date Acquired
August 9, 2013
Publication Date
November 1, 1977
Subject Category
Mechanical Engineering
Report/Patent Number
Meeting Information
Meeting: American Society of Mechanical Engineers, Winter Annual Meeting
Location: Atlanta, GA
Start Date: November 27, 1977
End Date: December 2, 1977
Sponsors: American Society of Mechanical Engineers
Accession Number
Distribution Limits

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