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Identification of Boundary Friction Coefficient Under Mixed Lubrication in Block-on-Ring Friction Tester with Aid of Partial EHL Analysis

Tanaka, S
Research Associate, Professor, Associate Professor and Research Associate,Tokyo Institute of Technology,

Nakahara, T
Research Associate, Professor, Associate Professor and Research Associate,Tokyo Institute of Technology,

Kyogoku, K
Research Associate, Professor, Associate Professor and Research Associate,Tokyo Institute of Technology,

Momozono, S
Research Associate, Professor, Associate Professor and Research Associate,Tokyo Institute of Technology,

Pages: 11    Published: Jan 2001

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Source: STP1404-EB

Abstract

This paper describes an estimation method of the boundary friction coefficient of sliding parts under mixed lubrication condition. The boundary friction coefficients in a mixed lubrication regime have been identified by comparing the measured frictional characteristics with the calculated results obtained from the mixed lubrication analysis solving simultaneously the elastohydrodynamic lubrication equations and the contact ones. A block-on-ring friction tester set in a pressure vessel has been developed which is able to measure frictional characteristics in various lubrication conditions and many kinds of atmosphere. The test has been carried out in a refrigerant atmosphere.

Keywords:
mixed lubrication, boundary friction, surface roughness, refrigerant, refrigeration oil, block-on-ring friction tester

Paper ID: STP10510S
Committee/Subcommittee: D02.L0
DOI: 10.1520/STP10510S
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