Tribological properties of a helical gear pair considering interfacial slip between lubricant and tooth surface

Liu, Mingyong; Deng, Enxi; Zhou, Hongyu; Qi, Dezhong; Qu, Yang

doi:10.1002/ls.1591

Cited by 4 publications

(4 citation statements)

References 41 publications

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“…Te angle between the contact line and the rotation axis of the gear is equal to the helix angle of the base circle, i.e., β b . A coordinate system is established as shown in Figure 1, where the y-axis is located at the contact line direction [9][10][11][12].…”

Section: Te Description Of Helical Gearmentioning

confidence: 99%

“…In this article, a thermal elastohydrodynamic lubrication model is adopted to simulate the lubrication state of the helical gear tooth surface. In addition, the non-Newtonian characteristics of lubricants are considered [9][10][11][12]. Based on the coordinate system shown in Figure 1, the generalized Reynolds equation is given as…”

Section: Termal Elastohydrodynamic Lubrication Modelmentioning

confidence: 99%

“…Liu et al [7,8] proposed a thermal EHL model of the spur gear under starved lubrication and discussed the infuence of oil supply on lubrication performance. Based on the fnite line contact theory, Liu et al [9][10][11][12] established a fnite line contact thermal EHL model for helical gears and systematically studied the infuence of geometric parameters and working conditions on the lubrication performance. Liu et al [13,14] investigated the lubrication performance of spur gear under the dynamic load.…”

Section: Introductionmentioning

confidence: 99%

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A Tribo‐Dynamic Model of a Helical Gear Pair Based on the Finite Line Contact Theory

Liu

Ouyang

Yan

et al. 2023

Mathematical Problems in Engineering

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In this article, a finite line contact tribo-dynamics model of helical gears is established by coupling the tooth surface friction, friction moment, and vibration velocity. To obtain convergent results, a cycle iteration strategy is adopted to solve the two submodels, the dynamic model and the thermal elastohydrodynamic lubrication model. The parameters obtained from the dynamic model such as the dynamic load, dynamic transmission error, and instantaneous speed of the teeth surfaces are used as the boundary conditions for solving the lubrication model. Meanwhile, the friction force and friction moment obtained by the lubrication model are used as parametric excitations of the dynamic model. Based on the proposed model, the influence of dynamic effect, thermal effect, rotational speed, and tooth surface roughness on the tribological and dynamic properties of helical gears are discussed. The results show that the tribological and dynamic parameters deviate significantly from the quasistatic values, especially at the characteristic speed. The vibration along the off-line-of-action direction is obviously affected by the friction excitation. As the rotational speed increases, the friction coefficient and friction force decrease as well as the vibration of the gear pair along the off-line-of-action direction weakens. In addition, the surface roughness has the greatest influence on the vibration of the off-line-of-action direction in all directions of gear vibrations.

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Section: Te Description Of Helical Gearmentioning

confidence: 99%

Section: Termal Elastohydrodynamic Lubrication Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Tribo‐Dynamic Model of a Helical Gear Pair Based on the Finite Line Contact Theory

Liu

Ouyang

Yan

et al. 2023

Mathematical Problems in Engineering

Self Cite

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“…However, during this stage, the oil film is not yet fully formed, and there is still some direct contact between the shaft and the bearing. This is known as the mixed lubrication stage [150,151]. As time passes, the lubricating fluid fills the lubricant, forming a thick oil film that separates the shaft and bearing, preventing any contact.…”

Section: Analysis Of Bearing Lubrication Statusmentioning

confidence: 99%

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Peng,

Zhao,

Shangguan

et al. 2023

Coatings

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With the significant penetration of wind generation, wind turbines require higher and higher lubrication performance for bearings. To improve the lubrication performance of wind power bearings, this study takes wind power bearings as the research object and comprehensively analyzes the wear forms of wind power bearings as well as intelligent lubrication methods. Firstly, the main roles and wear forms of wind turbine bearings are sorted out and analyzed. Secondly, the common lubrication problems of wind power bearings are analyzed from the bearing grease selection, lubrication mode, and lubrication status, highlighting the important influence of lubrication on bearings. Thirdly, the wind turbine bearing wisdom lubrication method research and organization, mainly including the wind power generation bearing lubrication materials, lubrication devices and monitoring methods, and other issues of research and analysis. Finally, current challenges and future development directions are summarized, which are designed to provide theoretical reference and technical support for the related research and engineering practice in the field of wind power engineering.

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Evaluation of Scuffing Load Capacity of Helical Gear Based on the Tribo‐Dynamic Model

Liu,

Chen,

et al. 2024

Lubrication Science

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The scuffing load capacity of gear is closely related to the meshing temperature rise of tooth surface. The key to predict the temperature rise is to establish an accurate meshing temperature rise model. In the paper, a tribo‐dynamic model of helical gear is established through coupling of tooth surface lubrication parameters, and the influence of temperature rise on ambient temperature during meshing process is considered. Then, the effects of oil supply temperature, input speed and torque on tooth surface temperature rise, film thickness, friction excitation and gear dynamic characteristics are discussed. The results show that the temperature rise of the gear is higher during the engaging‐in and engaging‐out regions. Meanwhile, there is local high temperature at the end of the contact line due to the end effect. The vibration of gear along the off‐line‐of‐action direction is mainly determined by friction excitation. With the increase of oil supply temperature, input speed and torque, the risk of scuffing failure increases and the influence of oil supply temperature and input load is more significant. The conclusions of this paper may provide some valuable suggestions for the anti‐gluing failure design of gear in engineering.

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Tribological properties of a helical gear pair considering interfacial slip between lubricant and tooth surface

Cited by 4 publications

References 41 publications

A Tribo‐Dynamic Model of a Helical Gear Pair Based on the Finite Line Contact Theory

A Tribo‐Dynamic Model of a Helical Gear Pair Based on the Finite Line Contact Theory

Review of Wind Power Bearing Wear Analysis and Intelligent Lubrication Method Research

Evaluation of Scuffing Load Capacity of Helical Gear Based on the Tribo‐Dynamic Model

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