A load distribution model for hypoid gears using ease-off topography and shell theory

Kolivand, Mohsen; Kahraman, Ahmet

doi:10.1016/j.mechmachtheory.2009.03.009

Cited by 139 publications

(53 citation statements)

References 26 publications

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“…It transpires that such a fundamental analysis of inlet flow suggests Swift-Stieber boundary condition rather than one which may be derived through numerical predictions or experimental observations alone. The predictions of the lubricant film thickness should also be corrected when non-Newtonian conditions are encountered [2,3,27]. This paper integrates gear pair and vehicle longitudinal dynamics with mixed-thermoelasthydrodynamic contact model of meshing teeth pairs of vehicular differential hypoid gears, an approach not hitherto reported in literature.…”

Section: Introductionmentioning

confidence: 99%

Transient mixed non-Newtonian thermo-elastohydrodynamics of vehicle differential hypoid gears with starved partial counter-flow inlet boundary

Mohammadpour

Theodossiades

Rahnejat

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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The paper presents solutions for transient mixed thermo-elastohydrodynamics of meshing differential hypoid gears of a vehicle under low speed urban driving and high speed cruising.Realistic gear meshing conditions, such as contact load including inertial effects are used, in line with engine power torque and wheel traction. This constitutes simultaneous solution of gear pair dynamics, non-Newtonian elastohydrodynamics as well as vehicle longitudinal inertial dynamics, an approach not hitherto reported in literature. The important link between contact tribology and vehicle gearing dynamics is highlighted. It is also shown that gear teeth pairs are subjected to a starved inlet boundary condition, represented by realistic inlet flow analysis. These conditions lead to the formation of a thin lubricant film with non-Newtonian shear and with modest boundary interactions.

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Section: Introductionmentioning

confidence: 99%

Transient mixed non-Newtonian thermo-elastohydrodynamics of vehicle differential hypoid gears with starved partial counter-flow inlet boundary

Mohammadpour

Theodossiades

Rahnejat

2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…On the downside, the complex geometry of hypoid gears has delayed the development of reliable tools for efficiency estimation tools. Recent work on hypoid gears involves contact models that require a great number of input parameters, extending to tooth cutting [11] or depending on separate software packages [12]. In this study, hypoid gear vehicle axle losses have been quantified through experimental measurement and a simple axle efficiency estimation method is proposed.…”

Section: Introductionmentioning

confidence: 99%

Hypoid gear vehicle axle efficiency

Kakavas

Olver

Dini

2016

Tribology International

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In this paper, a study of a hypoid gear vehicle axle is presented. Using a custom rig, loadindependent losses have been accurately measured and the effect of viscosity on spin loss has been quantified. Solution methods for the calculation of component losses are presented and combined into a complete thermally-coupled transient model for the estimation of axle efficiency. An analysis of hypoid gear kinematics reveals a simplification, commonly adopted by other researchers, regarding the velocity of the point of contact in hypoid gears, to be in error. As a result, the calculation of lubrication parameters has been improved. Finally, experimental measurements are compared to the generated simulation results for a number of operating scenarios and satisfactory correlation is observed.

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“…As a shortcoming, the hypoid gears experience higher sliding velocities, resulting in higher power losses due to excessive sliding frictions. Many researches have been made on design of the hypoid gears, as reviewed by Kolivand and Kahraman (Kolivand and Kahraman, 2009). The hypoid gears are generally machined in face-milling or face-hobbing.…”

Section: Introductionmentioning

confidence: 99%

Cutting force prediction in hypoid gear machining

Shiraishi

Kusaka

Matsumura

2016

JAMDSM

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Hypoid gear machining is a critical process in automobile industries. Many studies have discussed the gear machining in the geometrical model for manufacturing and design of the gears. In terms of the cutting process, the accuracies of the gears largely depend on the cutting forces. Therefore, the cutting force should be estimated to perform the high accurate gear cutting. However, few studies have been done on prediction of the cutting force. Analytical predictions of the cutting forces are required for manufacturing of gears with high qualities. This study presents an analytical model to predict cutting force in the hypoid gear cutting, in which the gear grooves are machined by sets of inner and outer cutting blades. Both of the blades finish the side and the end faces in the gear grooves. Different chip flows occurs on the end and the side edges of the blades. The chip flows are modeled by piling up orthogonal cuttings containing the cutting and the chip flow directions, where the chip flow direction is determined to minimize the cutting energy. The cutting forces loaded on the inner and the outer blades are predicted in the chip flow models. The presented model is validated in the cutting tests with measuring the cutting forces.

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A load distribution model for hypoid gears using ease-off topography and shell theory

Cited by 139 publications

References 26 publications

Transient mixed non-Newtonian thermo-elastohydrodynamics of vehicle differential hypoid gears with starved partial counter-flow inlet boundary

Transient mixed non-Newtonian thermo-elastohydrodynamics of vehicle differential hypoid gears with starved partial counter-flow inlet boundary

Hypoid gear vehicle axle efficiency

Cutting force prediction in hypoid gear machining

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