Influence of machine tool setting parameters on EHD lubrication in hypoid gears

Simon, Vilmos V.

doi:10.1016/j.mechmachtheory.2008.06.005

Cited by 32 publications

(27 citation statements)

References 27 publications

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“…This model, widely used for non-linear, non-Newtonian traction [20,32,34,40] does not include a limiting shear stress, There is also an underlying presumption that viscoelastic behaviour occurs at relatively high slideroll ratios. However, high wear rates have also been noted for even low slide-roll ratios under tractive conditions [41], where one would normally assume Newtonian shear.…”

Section: 1-non-newtonian Lubricant Shear Characteristicsmentioning

confidence: 99%

“…Simon [20] presented a thermo-elastohydrodynamic analysis of hypoid gear pairs. He considered the contact as an elliptical point contact.…”

Section: -Introductionmentioning

confidence: 99%

“…Simon [20] assumed the entrainment flow vector to be along the minor axis of the contact ellipse. This ignores the side leakage of lubricant from the contact and leads to the breach of continuity of flow condition.…”

Section: -Introductionmentioning

confidence: 99%

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Non-Newtonian mixed elastohydrodynamics of differential hypoid gears at high loads

et al. 2013

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Section: 1-non-newtonian Lubricant Shear Characteristicsmentioning

confidence: 99%

“…Simon [20] presented a thermo-elastohydrodynamic analysis of hypoid gear pairs. He considered the contact as an elliptical point contact.…”

Section: -Introductionmentioning

confidence: 99%

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Non-Newtonian mixed elastohydrodynamics of differential hypoid gears at high loads

et al. 2013

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“…However, a line contact geometry was assumed. Simon 38 presented a thermo-elastohydrodynamic analysis of hypoid gear pairs with elliptical point contact geometry, but with the entrainment flow vector was along the minor axis of the contact ellipse. Furthermore, a low applied input torque, not representative of vehicular differentials, was used.…”

Section: Introductionmentioning

confidence: 99%

Non-Newtonian mixed thermo-elastohydrodynamics of hypoid gear pairs

Mohammadpour

Theodossiades

Rahnejat

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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Transmission efficiency is the main objective in the development of vehicular differential systems, comprising hypoid gear pairs. The overall aim is to contribute to improved vehicle fuel efficiency and thus levels of harmful emissions for modern desired eco-drive axles. Detailed predictive analysis plays an important role in this quest, particularly under realistic operating conditions, comprising high contact loads and shear rates. Under these conditions, the hypoid gear pairs are subject to mixed non-Newtonian thermo-elastohydrodynamic conditions, which is the approach undertaken in this paper. Such an approach for hypoid gear pair has not hitherto been reported in the literature.

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“…Xu and Kahraman (2007) and Kolivand et al (2010) have investigated mechanical inefficiencies in gearing arising from the EHL of meshing gear pairs, where a line contact approximation is made with flow along the contact width. Simon (2009b) presented a thermo-elastohydrodynamic analysis of hypoid gear pairs with point contact geometry, but at relatively low input torque, not representative of vehicle differentials. Again, the flow vector is assumed along the minor axis of the contact ellipse, this being a shortcoming as experimental evidence, for example by Gohar (1971) and numerical work by and Jalali-Vahid et al (2000) suggest significant side-leakage flow along the major axis of the contact ellipse.…”

Section: Introductionmentioning

confidence: 99%

Elastohydrodynamic lubrication of hypoid gear pairs at high loads

Mohammadpour

Theodossiades

Rahnejat

2012

Proceedings of the Institution of Mechanical Engineers, Part J:

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The definitive version can be found at: century. Transmission efficiency as well noise and vibration concerns require combined elastohydrodynamic and tooth contact analysis of hypoid gear teeth pairs through mesh. Although such analyses have been reported for general cases of elliptical point contact conjunctions with angled flow entrainment, they do not comply with the prevailing load and kinematic conditions in differential gears. In particular, teeth pair contacts are subject to significant loads of order of several kN requiring solution to the EHL problem at such high loads. The current analysis reports solutions for rolling and sliding elastohydrodynamics of hypoid gear teeth pairs at realistic drive torques, not hitherto reported in literature.

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Influence of machine tool setting parameters on EHD lubrication in hypoid gears

Cited by 32 publications

References 27 publications

Non-Newtonian mixed elastohydrodynamics of differential hypoid gears at high loads

Non-Newtonian mixed elastohydrodynamics of differential hypoid gears at high loads

Non-Newtonian mixed thermo-elastohydrodynamics of hypoid gear pairs

Elastohydrodynamic lubrication of hypoid gear pairs at high loads

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