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Method of evaluation of lubricating ability of lube oils and fuels in energetistic formulation

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The paper presents an interpretation of operation of a boundary layer of a lubricating medium. A model of the homogeneous Poisson process has been proposed to assess the deterioration process of the layer's operation. The assessment considers the original interpretation of operation of a boundary layer, as a lubricity measure of a boundary layer of any lubricant. In the submitted proposal the operation of a boundary layer is understood as a transfer of energy Ep, resulting from tribological system load at a given time t, in the form of work Lp which may lead to a breakdown of this layer. The operation is equated to a physical quantity with the unit of measure which is joule-second. Hereby, it has been shown that for this interpretation the operation may be determined not only by a number with the unit of measure [Js], but also in the form of an area of operation presented in a graph made on the ''Lp-t'' system, where: Lp(t) − work needed to break a boundary layer of a lubricating medium at time t, t − time of operation of the lubricant boundary layer. The paper also demonstrates usefulness of such understood operation of a lubricant boundary layer for assessment of the lubricity of this layer. The usefulness consists in that the layer operation can be defined as the required operation and possible operation. If the possible operation of a lubricant boundary layer is larger than the required, this medium can be used for lubrication of tribological systems. Otherwise, each tribological system undergoes wear.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Opublikowano w:
Journal of Polish CIMEEAC nr 5, strony 43 - 50,
ISSN: 1231-3998
Język:
angielski
Rok wydania:
2010
Opis bibliograficzny:
Girtler J.: Method of evaluation of lubricating ability of lube oils and fuels in energetistic formulation// Journal of Polish CIMAC. -Vol. 5., nr. No. 1 (2010), s.43-50
Weryfikacja:
Politechnika Gdańska

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