Research on the meshing characteristics of asymmetric gears considering the tooth profile deviation

Mo, Shuai; Li, Yuhua; Luo, Bingrui; Wang, Lei; Bao, Heyun; Cen, Guojian; Huang, Yunsheng

doi:10.1016/j.mechmachtheory.2022.104926

Cited by 27 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High performance under harsh operating conditions is demanded from modern gear transmission systems. 56–59 In this regard, the asymmetric tooth concept emerges as an important research area, considering its advantages over symmetric designs. The researchers have so far reported that the asymmetric gears outperformed the standard designs in many aspects, such as bending strength, impact resistance, and fatigue life.…”

Section: Resultsmentioning

confidence: 99%

“…The study parameterized the pressure angle and endeavored to understand the efficacy of asymmetric tooth profile against sliding wear. Mo et al 57 established an analytical model for asymmetric gear pairs in order to analyze TVMS and transmission error. The researchers compared their model’s findings with those obtained through FE simulations and concluded that the TVMS increased with the increment of the DSPA.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Influence of tooth root cracks on the mesh stiffness of asymmetric spur gear pair with different backup ratios

Doǧan

Kalay

Karpat

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Gears are critical machine elements that transmit power and motion in diverse implementation fields. Over time, gears may produce a series of faults due to harsh operating conditions, fatigue, manufacturing errors, etc., leading to severe performance degradation. During the meshing process, the stiffness of a single tooth controls the load sharing, vibration, and noise characteristics of a geared system. An undetected fault could decrease the gear stiffness and thus may lead to a fatal breakdown, substantial economic losses, or even human casualties in safety-critical applications such as helicopters, high-speed trains, and wind turbines. Hence, the accurate quantification of the gear stiffness emerges as an important research area to obtain reliable gear designs. With this in mind, the asymmetric tooth concept offers superior bending strength, fatigue propagation life, and the ability to lessen vibration over the standard (symmetric) designs in applications where unidirectional loadings are predominant. This study investigates the influence of tooth root cracks on the single-tooth and meshing stiffness characteristics of the standard and asymmetric involute spur gears. To this end, the numerical crack propagation paths obtained in our previous works were introduced to the created 3D CAD geometries. Subsequently, the single tooth stiffness of both healthy and cracked (2 5%-50%-75%-100%) gears was calculated through the ANSYS® Workbench, and the time-varying mesh stiffness was obtained. The present study evaluated the effects of backup ratio and the tooth asymmetry on the spur gears’ meshing stiffness characteristics simultaneously and further expanded the scope of the research work. The results indicated that the single tooth stiffness and mesh stiffness could be improved by 35% and 22%, respectively, as the drive side pressure angle increased from 20° to 35°. It has been noted that the gear stiffness decreased as the crack level increased, while the increment of the backup ratio further increased the reduction in the stiffness. The findings could provide significant outputs for a better understanding of the influence of tooth asymmetry on the gear dynamics characteristics, life prediction, and early fault diagnosis.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Influence of tooth root cracks on the mesh stiffness of asymmetric spur gear pair with different backup ratios

Doǧan

Kalay

Karpat

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…One is to study the elastohydrodynamic lubrication of gear lubrication through numerical theory programming, 1 and the other is to use professional fluid simulation software to simulate the real gear lubrication state and judge the lubrication effect of gear. 2 In this paper, the latter is selected to study the lubrication characteristics of spiral gear by CFD fluid simulation. Firstly, the meshing principle and Matlab software are used to obtain the point cloud of the spiral gear tooth surface.…”

Section: The Model Of Computational Fluid Dynamicsmentioning

confidence: 99%

“…At present, the research on gear lubrication characteristics in China and abroad is roughly divided into two categories. One is to study the elastohydrodynamic lubrication of gear lubrication through numerical theory programming, 1 and the other is to use professional fluid simulation software to simulate the real gear lubrication state and judge the lubrication effect of gear 2 . In this paper, the latter is selected to study the lubrication characteristics of spiral gear by CFD fluid simulation.…”

Section: The Model Of Computational Fluid Dynamicsmentioning

confidence: 99%

“…As an important transmission form, gear transmission is widely used in automobile, aviation, medical machinery and other fields. According to the characteristics of gear transmission, people continue to explore new tooth profiles and propose a variety of new gears, such as arc tooth cylindrical gears, 1 asymmetric gears, 2 and face gears 3,4 . The particularity of the arc tooth cylindrical gear in bearing and transmission makes it have a high application prospect.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lubrication characteristic of tooth surface on arc tooth cylindrical gears

Luo

Dang

et al. 2022

Lubrication Science

Self Cite

View full text Add to dashboard Cite

This article studies the lubrication state of the arc tooth cylindrical gears during injection lubrication. The mathematical model of arc tooth cylindrical gears are established based on meshing principle. The lubrication characteristics of arc tooth cylindrical gears under different injection methods and conditions are analysed by using computational fluid dynamics (CFD) model. The variation law of oil volume fraction in the gear-meshing zone is obtained.Comparing the two oil jet methods in into mesh lubrication, when the ratio of the pitch line velocity to the injection velocity is less than 1.5 times, the best lubrication is gained through the concave surface injection method, when the ratio of the pitch line velocity to the injection velocity is more than 1.5 times, the best lubrication is gained through the convex surface injection method. It shows that the tooth shape has significant influence on lubrication when the lubricating oil is injected.

show abstract

Research on pitch error phase matching of herringbone star gear system considering multi-tooth with different backlash

Chen,

Zhu,

Chen

et al. 2024

Acta Mech. Sin.

View full text Add to dashboard Cite

Research on the meshing characteristics of asymmetric gears considering the tooth profile deviation

Cited by 27 publications

References 19 publications

Influence of tooth root cracks on the mesh stiffness of asymmetric spur gear pair with different backup ratios

Influence of tooth root cracks on the mesh stiffness of asymmetric spur gear pair with different backup ratios

Lubrication characteristic of tooth surface on arc tooth cylindrical gears

Research on pitch error phase matching of herringbone star gear system considering multi-tooth with different backlash

Contact Info

Product

Resources

About