Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/4047
Título: Film thickness in a ball-on-disc contact lubricated with greases, bleed oils and base oils
Autor: Cousseau, Tiago
Björling, M.
Graça, Beatriz M.
Campos, Armando José Vilaça
Seabra, Jorge
Larsson, R.
Palavras-chave: Grease
Bleed oil
Base oil
EHD optical interferometry
Data: 2012
Editora: Elsevier
Relatório da Série N.º: Tribology International; Vol. 53
Resumo: Three different lubricating greases and their bleed and base oils were compared in terms of film thickness in a ball-on-disc test rig through optical interferometry. The theoretical values calculated according to Hamrock's equation are in close agreement with the base oil film thickness measurements, which validates the selected experimental methodology. The grease and bleed oil film thickness under fully flooded lubrication conditions presented quite similar behaviour and levels. Therefore, the grease film thickness under full film conditions might be predicted using their bleed oil properties, namely the viscosity and pressure-viscosity coefficient. The base and bleed oil lubricant parameter LP are proportional to the measured film thickness. A relationship between grease and the corresponding bleed oil film thickness was evidenced.
Peer review: yes
URI: http://hdl.handle.net/10400.22/4047
ISSN: 0301-679X
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0301679X12001429
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