Wear simulation of worm gears based on an energetic approach

Daubach, K.; Oehler, Manuel; Sauer, Bernd

doi:10.1007/s10010-021-00525-3

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The worm gear geometry and operating conditions, as well as solid material and oil properties, are listed in Table 1. Geometries of the contacting tooth flanks, velocities, and load distributions for each meshing position across the area of gear contact are obtained from a tooth contact analysis (TCA) by the worm gear software SNETRA [12][13][14]. SNETRA data are transformed from the coordinate system of SNETRA (x S , y S , z S ) to the coordinate system of the numerical EHL model (x, y, z).…”

Section: Object Of Investigationmentioning

confidence: 99%

Thermal Elastohydrodynamic Analysis of a Worm Gear

et al. 2023

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This study explores the elastohydrodynamic lubrication (EHL) between the contacting tooth flanks of a worm gear with nonconjugate meshing action. The contact is characterized by a slender-like elliptical shape and high sliding. The geometry and contact conditions for the considered worm gear were obtained using tooth contact analysis. Based on that, the complete area of the worm gear contact was analyzed using a validated numerical EHL model considering non-Newtonian, thermal, and transient effects. The geometrical and kinematic design factors that influence EHL film formation in worm gears were identified and are discussed. The results show the specific characteristics of worm gear EHL contacts, such as the very slender contact in the tooth root flank area, which diminishes the effect of the entrainment speed on film thickness. EHL film formation could be supported by increasing conformity between the flanks to make the contact less slender. By comparing the film thickness results against analytically obtained ones, relatively large differences were observed except for one formula for minimum film thickness.

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Section: Object Of Investigationmentioning

confidence: 99%

Thermal Elastohydrodynamic Analysis of a Worm Gear

et al. 2023

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“…Hitcher [10] carried out a numerical simulation to study the influence of cutting parameters and to find the optimal manufacturing procedure. Daubach [11] developed a simulation model for the abrasive wear of worm gears based on the energetic wear equation. This simulation model includes tooth contact analysis and tribological calculation to determine friction and wear.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Contact Patterns of Worm-Gear Sets on Friction Heat Generation during Meshing

Miltenović,

Banić,

Vitković

et al. 2024

Applied Sciences

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Friction losses and scuffing failures are interesting research topics for worm gears. One of the factors leading to scuffing is the heat generated in the contact of gear teeth. The contact geometry of worm gears is complex, leading to high friction between contact surfaces. High friction between contact surfaces during operation generates heat friction that causes the occurrence of scuffing, which in turn determines the scuffing load capacity. To analyse the thermal characteristics of a worm-gear pair and the thermal behaviour of contact teeth, a direct-coupled thermal–structural 3D finite element model was applied. The heat flux due to friction-generated heat was determined on the gear tooth to investigate thermal characteristics and predict transient temperature fields. This study permits an in-depth understanding of the temperature fields and the friction heat generation process. Also, better control of the contact pattern between worm-gear teeth would decrease friction heat and increase scuffing load capacity. This paper investigates the transient thermal behaviour among different pinion machine setting parameters that can result in an optimal tooth-contact pattern that produces a lower temperature field, thus achieving higher transmission efficiency.

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