The effect of an oscillatory entrainment velocity on the film thickness in thermal EHL point contact |
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| Affiliation: | 1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;1. PSA Peugeot Citroen, Route de Gisy, 78140 Velizy, France;2. LTDS, UMR CNRS 5513, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, BP163, 69131 Ecully, France;3. Univ. Paris-Est, Laboratoire Navier (Ecole des Ponts ParisTech, IFSTTAR, CNRS), F-77455 Marne-la-Vallee, France;1. School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China;2. School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China |
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| Abstract: | In this study, the mathematical model for transient thermal elastohydrodynamic lubrication (EHL) was established and the effect of tangential vibration on thermal EHL was investigated. The pressure calculation was carried out by a multi-grid technique, the elastic deformation was evaluated by a multilevel multi-intergration method, and the temperature was calculated by a single-direction sequential column sweeping process. The present study aims to explain the multi-dimple phenomenon observed experimentally by Ehret and Bauget Proc Inst Mech Eng Part J: J Eng Tribol 2001; 215: 289–300]. The results show that a tangential vibration produces significant change of pressure and film thickness and it seems to be the most possible mechanism of the movement of multi-dimples observed by Ehret and Bauget Proc Inst Mech Eng Part J: J Eng Tribol 2001; 215: 289–300]. Furthermore, the effect of the curvature radius, viscosity–pressure coefficient, load and the parameters of vibration was also investigated. |
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| Keywords: | Thermal EHL Tangential vibration Multi-dimple |
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