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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/22655

Title: Effect of lubricant rheology on hypoid gear pair efficiency
Authors: Paouris, Leonidas I.
Theodossiades, Stephanos
Rahmani, Ramin
Rahnejat, Homer
Hunt, Gregory
Barton, William
Keywords: Hypoid gear pair
Elastohydrodynamics
Gear dynamics
Friction
Jump phenomenon
Resonance
Lubricant rheology
Issue Date: 2016
Publisher: © The Authors
Citation: PAOURIS, L.I. ...et al., 2016. Effect of lubricant rheology on hypoid gear pair efficiency. Presented at the 3rd Biennial International Conference on Powertrain Modelling and Control (PMC 2016), Loughborough University, 7-9th Sept.
Abstract: A tribo-dynamics model of a differential hypoid gear pair is presented, integrated with lubricated contact of meshing teeth pair with lubricants of varying rheological properties. Particular attention is paid to the effect of lubricant formulation and gear geometry on the system efficiency. The influence of gear torsional dynamic response is taken into account in a 4-Degree of Freedom (DoF) model. The contact geometry and kinematics of the hypoid gear pair are estimated, using Tooth Contact Analysis (TCA). Two fully formulated gear lubricants of the same viscosity grade (SAE 75W-90) blended with the same additive pack, but with different types and concentration of viscosity modifier (VM) are considered. Conjunctional friction is predicted for viscous shear of fully characterised lubricants as well as boundary interaction of rough surfaces. The results show loss of friction resulting in resonant response of the gear pair with impact of meshing teeth exhibiting non-linear jump phenomenon. The predictions also show that lubricants with higher pressure – viscosity (PV) coefficients tend to exhibit increased power loss.
Description: This is a conference paper.
Sponsor: This research was financial supported by Lubrizol Ltd.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/22655
Publisher Link: http://www.pmc2016.net/
Appears in Collections:Conference Papers and Contributions (Mechanical, Electrical and Manufacturing Engineering)

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