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Title: Inefficiency predictions in a hypoid gear pair through tribodynamics analysis
Authors: Paouris, Leonidas I.
Rahmani, Ramin
Theodossiades, Stephanos
Rahnejat, Homer
Hunt, Gregory
Barton, William
Keywords: Mechanical transmission inefficiency
Hypoid gears
Lubricant rheology
Viscosity modifiers
Issue Date: 2017
Publisher: © Elsevier
Citation: PAOURIS, L.I....et al., 2017. Inefficiency predictions in a hypoid gear pair through tribodynamics analysis. Tribology International, 119, pp. 631-644.
Abstract: A tribo-dynamics model, predicting the conjunctional inefficiency and dynamic response of automotive hypoid gear pairs is presented. A dynamics model is coupled with an analytical friction model (viscous and boundary). The temperature rise at the centre of the conjunction is accounted for through use of thermal network model and Time Temperature Superposition (TTS) method, as well as the time varying geometry of the meshing gear teeth. Newtonian and non-Newtonian lubricant shear behaviour are both considered Surface topography measurements of a run-in pinions are obtained. Inefficiency calculations are performed for typical automotive drive cycle snapshots. Precisely measured lubricant shear characterstics for lubricants different blended viscosity modifiers and evolving surface topography are used in the study of transmission inefficiency. The integrated thermal-tribodynamic analysis is shown to distinguish between different viscosity modifier types, an approach not hitherto reported in literature.
Description: This paper was published in the journal Tribology International and the definitive published version is available at https://doi.org/10.1016/j.triboint.2017.11.035.
Sponsor: The authors would like to express their gratitude to Lubrizol Ltd. for sponsorhip of this research.
Version: Accepted for publication
DOI: 10.1016/j.triboint.2017.11.035
URI: https://dspace.lboro.ac.uk/2134/27584
Publisher Link: https://doi.org/10.1016/j.triboint.2017.11.035
ISSN: 1879-2464
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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