Geometry Modification of Helical Gear for Reduction of Static Transmission Error

Park, Jeonghyun; Seo, Chang-Jun; Boo, Kwangsuck; Kim, Heungseob

doi:10.1051/matecconf/201816702013

Cited by 3 publications

(2 citation statements)

References 5 publications

(5 reference statements)

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“…With a two-layer FEM, the PPTE (peak-to-peak transmission error) is assessed at the roll points under different loading conditions. The study focused analytically on reducing the transmission error, but in a constant state with time and not changing [25].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

High-Speed Helical Gear Design Parameters Effect on the Dynamic Stress

Hassan,

Hawas,

Abdullah

et al. 2023

MMEP

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Helical gears, due to their increased contact region during the engagement cycle and consequent reduction in noise, have become ubiquitous in mechanical engineering applications and thus form the focal point of this study. This research paper meticulously examines the position of the helix angle and comprehensively evaluates its influence on the reaction force and its evolution on the gear shaft. The results reveal an optimal helix angle of 30 degrees, which minimizes the stress impact on the shaft. In contrast to the typical 40-degree angle, a reduced helix angle of approximately 5 degrees results in the largest displacement along the x-axis for gear 3 at a rotational speed of 590 rad/s, reaching up to 0.15 micrometers. Furthermore, the lowest percentage error can be observed at the 5-degree angle, with a maximum value of 0.8 degrees. A maximum reaction force of 1080 N is observed at a helix angle of 5 degrees, which increases further with the length of the helix. These results provide compelling evidence in favor of the 5-degree angle as opposed to significantly larger angles. The force exerted on the shaft, viewed from two distinct axes, and its temporal evolution are also meticulously examined, providing valuable insights into the dynamic stress of highspeed helical gears.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

High-Speed Helical Gear Design Parameters Effect on the Dynamic Stress

Hassan,

Hawas,

Abdullah

et al. 2023

MMEP

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“…Furthermore, the impact of tooth modification in the presence of tooth localised defect is studied while its influence on vibration amplitude is also covered in this Divandari et al [11]. The research conducted in [12] investigated the influence of tooth modification on static transmission error and contact stress analysis is implemented in different loading conditions. A novel proposition in [13] for gear noise reduction is presented by analysing the two gearboxes and their optimising micro-geometry.…”

Section: Introductionmentioning

confidence: 99%

Influence of Optimal Tooth Modifications on Dynamic Characteristics of a Vehicle Gearbox

Ullah

Cong

Huan

et al. 2019

IJAME

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Considering the practical problems of gear noise and vibration, this work focuses on the gearbox of the electric vehicle as the research object to analyse the impact of gear micro-tooth modification. First of all, the effort centres itself on minimising the contact stress and making the load distribution better by implementing the tooth modification on both upper and central speed phases. The procedural analysis of gear tooth modification is executed to make the contact pattern better, so edge contact has been avoided and the load is distributed over a wide area of the tooth for both upper and central gear sets. The contact pattern is positioned in the centre of teeth and contact stress is lowered by 20% to 837 MPA. Then, the peak to peak transmission error is decreased under three proposed modification approaches. Also, contact and bending safety factors are improved as a result of tooth modification. Meanwhile, it was noticed by performing dynamic analysis that right bearings of both upper and central phases have a higher radial response for first two orders which is further decreased to an optimum level as a result of micro-tooth modification strategies.

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