Effects of rack-cutter parabolic modification on loaded contact characteristics for crossed beveloid gears with misalignments

Ni, Gaoxiang; Zhu, Caichao; Song, Chaosheng; Shi, Junye; Liu, Siyuan

doi:10.1016/j.ijmecsci.2018.04.003

“…It is deserved to be mentioned that the effects of gear modification techniques on the gear contact characteristics have also been investigated by the author's team [42]. Liu et al [43] proposed a mathematical concave modification model for the beveloid gear tooth surfaces with crossed axes.…”

Section: Gear Materials and Macroscopic Geometriesmentioning

confidence: 99%

A Review on Micropitting Studies of Steel Gears

Liu

¹

,

Liu

²

,

Zhu

³

et al. 2019

Self Cite

View full text Add to dashboard Cite

With the mounting application of carburized or case-hardening gears and higher requirements of heavy-load, high-speed in mechanical systems such as wind turbines, helicopters, ships, etc., contact fatigue issues of gears are becoming more preponderant. Recently, significant improvements have been made on the gear manufacturing process to control subsurface-initiated failures, hence, gear surface-initiated damages, such as micropitting, should be given more attention. The diversity of the influence factors, including gear materials, surface topographies, lubrication properties, working conditions, etc., are necessary to be taken into account when analyzing gear micropitting behaviors. Although remarkable developments in micropitting studies have been achieved recently by many researchers and engineers on both theoretical and experimental fields, large amounts of investigations are yet to be further launched to thoroughly understand the micropitting mechanism. This work reviews recent relevant studies on the micropitting of steel gears, especially the competitive phenomenon that occurs among several contact fatigue failure modes when considering gear tooth surface wear evolution. Meanwhile, the corresponding recent research results about gear micropitting issues obtained by the authors are also displayed for more detailed explanations.

show abstract

“…Ni et. al [30,31] improved the contact performance by a parabolic tip relief by a numerical design approach based on the gear-manufacturing and meshing theory. The dynamic responses of low contact ratio spur gear by linear and parabolic tip relief [32] have been compared for the minimum dynamic load of gears under different working conditions.…”

Section: Introductionmentioning

confidence: 99%

A Novel Tooth Tip Relief Method for Reducing Micro-Pitting of Spur Gears

Xu

¹

,

Liang

²

,

Zuo

³

et al. 2021

Preprint

1

0

View full text Add to dashboard Cite

Micro-pitting is a common fatigue failure mode of spur gears. To reduce it, this paper proposes a novel tooth tip relief method. Gear meshing simulation is firstly performed considering the actual contact path, showing that there are four Hertz contact stress peaks in the transition areas of the tooth flank. Equations are then developed for the novel tooth tip relief method: one focuses on the smooth transition between the involute profile and the tip relief region, the other on the smooth transition between the tip relief region and the tooth tip. The results of curvature radius and Hertz contact stress show that the proposed novel method can effectively reduce the Hertz contact stress peaks, which indicates this tip relief method could benefit for reducing the micro-pitting. Finally, both wear simulations and bench tests are conducted, verifying the effectiveness of the proposed method for reducing the micro-pitting of spur gears.

show abstract

“…Simon 29 presented a linear function for the simultaneous calculation of optimal tooth tip relief and tooth crowning for spur and helical gears, which improved the load and stress distribution considerably. Ni et al 30,31 improved the contact performance by a parabolic tip relief by a numerical design approach based on the gear-manufacturing and meshing theory. The dynamic responses of low contact ratio spur gear by linear and parabolic tip relief 32 have been compared for the minimum dynamic load of gears under different working conditions.…”

Section: Introductionmentioning

confidence: 99%

A novel tooth tip relief method for reducing micro-pitting of spur gears

Xu

¹

,

Liang

²

,

Zuo

³

et al. 2021

Advances in Mechanical Engineering

3

0

View full text Add to dashboard Cite

Micro-pitting is a common fatigue failure mode of spur gears. To reduce it, this paper proposes a novel tooth tip relief method. Gear meshing simulation is firstly performed considering the actual contact path, showing that there are four Hertz contact stress peaks in the transition areas of the tooth flank. Equations are then developed for the novel tooth tip relief method: one focuses on the smooth transition between the involute profile and the tip relief region, the other on the smooth transition between the tip relief region and the tooth tip. The results of curvature radius and Hertz contact stress show that the proposed novel method can effectively reduce the Hertz contact stress peaks, which indicates this tip relief method could benefit for reducing the micro-pitting. Finally, both wear simulations and bench tests are conducted, verifying the effectiveness of the proposed method for reducing the micro-pitting of spur gears.

show abstract

Effects of rack-cutter parabolic modification on loaded contact characteristics for crossed beveloid gears with misalignments

Cited by 20 publications

References 17 publications

A Review on Micropitting Studies of Steel Gears

A Review on Micropitting Studies of Steel Gears

A Novel Tooth Tip Relief Method for Reducing Micro-Pitting of Spur Gears

A novel tooth tip relief method for reducing micro-pitting of spur gears

Contact Info

Product

Resources

About