Hypoid gear vehicle axle efficiency

Kakavas, I.; Olver, A.D.; Dini, Daniele

doi:10.1016/j.triboint.2016.04.030

Cited by 15 publications

(11 citation statements)

References 20 publications

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“…They used a specific TNM for heat balance calculations, which correspond closely to the measurements. Further approaches to using TNMs for heat balance and temperature calculations with regard to gearboxes can be found in [26] for worm gears, [14] for hypoid gears, [4,11,19] for spur gears, [6,42] for planetary gears and [38] for helical gears.…”

Section: State Of the Artmentioning

confidence: 99%

Efficiency and heat balance calculation of worm gears

Paschold

Sedlmair

Lohner

et al. 2020

Forsch Ingenieurwes

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Worm gears enable compact gear design and high power density due to a high gear ratio within a single gear stage. However, they often show high sliding speeds within the tooth contact, resulting in high frictional heat and increased thermal stresses. Therefore, an exact calculation regarding efficiency and heat balance is essential in the early stages of gear design. Currently, no calculation method is available to automatically analyze worm gears with regard to efficiency and heat balance. The simulation program "WTplus" is widely used to calculate the efficiency and heat balance of gearbox systems containing cylindrical and bevel gears. The efficiency is determined by adding up load-dependent and no-load power losses of gears, bearings, seals and other rotating components. The calculation of the heat balance of the gearbox is based on the heat transfer between the single components, as well as heat dissipation to the environment. A suitable abstraction of the gearbox by nodal points is conducted for an efficient and accurate calculation of local temperatures using a thermal network model. The simulation program WTplus was extended to automatically analyze the efficiency and heat balance of various designs of worm gears. For this, new approaches for the calculation of load-dependent and no-load losses, as well as new algorithms for nodalization and node-linking, were developed and implemented. Moreover, essential formulas describing the thermal resistances were customized. Simulation results were validated with measurements from research and industry showing very close alignment for various operating points and gear designs.

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Section: State Of the Artmentioning

confidence: 99%

Efficiency and heat balance calculation of worm gears

Paschold

Sedlmair

Lohner

et al. 2020

Forsch Ingenieurwes

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“…The role of super finishing in increasing gear efficiency have been investigated for varying speed by Andersson et al [10]. Additional works related to the efficiency of spur and helical gear pairs [11,12], epicyclical gear trains [13]; hypoid gears [14] can be found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Efficiency and Durability of DLC-Coated Gears

Barbieri

Iarriccio

Pellicano

et al. 2020

Mechanisms and Machine Science

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This paper presents an experimental study on spur gears. Gears with and without tungsten-carbide coatings (WC/C) are compared in terms of efficiency, durability and vibration performance. In order to carry out the experiments, a test rig including two electric motors/brakes is described. Gears are designed for this specific experimental campaign, so that the number of teeth, the selected materials and thermochemical treatments are optimal to investigate gear efficiency and durability. The experimental procedure allows for a simultaneous evaluation of efficiency and dynamic transmission error by varying the rotational velocity of the gear pair. An additional investigation has been performed for varying load, so that a complete characterization of the effect of WC/C coating on gear performance is presented.

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“…Fanghella et al [2] discussed the functional characteristics of a nutating gearbox with bevel gears, for which the expressions of the transmission ratio and efficiency were obtained, including the main design. Kakavas et al [3] proposed a thermal coupled transient model of a hypoid gear for power loss calculation and analyzed and compared numerical simulations and experimental results. Paouris [4] presented a tribodynamic model of differential hypoid gears, for which the lubricated contact of the meshing gear pair was integrated with lubricants of varying rheological properties, and the influence of lubricant formulation and gear geometry on system efficiency was examined.…”

Section: Introductionmentioning

confidence: 99%

Integrated Analysis of Influence of Multiple Factors on Transmission Efficiency of Loader Drive Axle

Chi

et al. 2019

Energies

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In this study, a loader drive axle digital model was built using 3D commercial software. On the basis of this model, the transmission efficiency of the main reducing gear, the differential planetary mechanism, and the wheel planetary reducing gear of the loader drive axle were studied. The functional relationship of the transmission efficiency of the loader drive axle was obtained, including multiple factors: the mesh friction coefficient, the mesh power loss coefficient, the normal pressure angle, the helix angle, the offset amount, the speed ratio, the gear ratio, and the characteristic parameters. This revealed the influence law of the loader drive axle by the mesh friction coefficient, mesh power loss coefficient, and speed ratio. The research results showed that the transmission efficiency of the loader drive axle increased with the speed ratio, decreased when the mesh friction coefficient and the mesh power loss coefficient increased, and that there was a greater influence difference on the transmission efficiency of the loader drive axle.

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Hypoid gear vehicle axle efficiency

Cited by 15 publications

References 20 publications

Efficiency and heat balance calculation of worm gears

Efficiency and heat balance calculation of worm gears

Efficiency and Durability of DLC-Coated Gears

Integrated Analysis of Influence of Multiple Factors on Transmission Efficiency of Loader Drive Axle

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