Transient thermoelastohydrodynamic lubrication analysis of an involute spur gear

Wang, Youqiang; Li, Hongqi; Tong, Jingwei; Yang, Peiran

doi:10.1016/j.triboint.2004.04.005

Cited by 94 publications

(30 citation statements)

References 7 publications

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“…The pressure-viscosity coefficient is set at a ¼ 9:5 Â 10 À9 Pa À1 and the lubricant density at q f ¼ 790kg=m 3 . Parameters describing the lubricant thermal properties are taken from Table 1, which are very representative of EHL lubricants and are similarly used in Wang et al [14]. Figure 4 shows the meshing-efficiency results predicted by the model for the nine test conditions of PetryJohnson et al [7].…”

Section: Results and Analysismentioning

confidence: 99%

“…The equations may be solved by numerical methods with appropriate pressure and temperature boundary conditions. Various versions of solution have been obtained for the transient problem as presented in Larsson [13], Wang et al [14], Li and Kahraman [9,15]. After the equations are solved at a given point along the line of action, the friction force in the tooth contact can be calculated by integrating the shear stresses over the contact region:…”

Section: Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Analysis of the Meshing Losses of Involute Spur Gears in High-Speed and High-Load Conditions

Chang

Jeng

Huang

2012

Journal of Tribology

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A first-principle based mathematical model is developed in this paper to analyze the meshing losses in involute spur gears operating in high-load and high-speed conditions. The model is fundamentally simple with a few clearly defined physical parameters. It is computationally robust and produces meaningful trends and relative magnitudes of the meshing losses with respect to the variations of key gear and lubricant parameters. The model is evaluated with precision experimental data. It is then used to study the effects of various gear and lubricant parameters on the meshing losses including gear module, pressure angle, tooth addendum height, thermal conductivity, and lubricant pressureviscosity and temperature-viscosity coefficients. The results and analysis suggest that gear module, pressure angle, and lubricant pressure-viscosity and temperature-viscosity coefficients can significantly affect the meshing losses. They should be the design parameters of interest to further improve the energy efficiency in high-performance, multistage transmission systems. Although the model is developed and results obtained for spur gears, the authors believe that the trends and relative magnitudes of the meshing losses with respect to the variations of the gear and lubricant parameters are still meaningful for helical gears.

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Section: Results and Analysismentioning

confidence: 99%

Section: Modelingmentioning

confidence: 99%

Modeling and Analysis of the Meshing Losses of Involute Spur Gears in High-Speed and High-Load Conditions

Chang

Jeng

Huang

2012

Journal of Tribology

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“…A recent overview of deterministic mixed lubrication modelling using roughness measurements [19]. Other essential papers dealing with the topic are studies by Larsson [20] and Wang et al [21]. Cann et al [2] studied the lambda ratio and reported that values as high as 20 can give occasional metallic contact, while for well run-in surfaces, as low as 0.3 can stop all metallic contact.…”

Section: Lubricated Gear Contactmentioning

confidence: 99%

Evaluation of lubrication conditions in gear contacts using contact resistance and bulk temperature measurements

Kleemola

Lehtovaara

2010

Proceedings of the Institution of Mechanical Engineers, Part J:

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Lubrication conditions have a major effect on lifetime and friction in gear contacts. Monitoring of relative changes in protecting film thickness provides an opportunity to understand the operating conditions before an initial fault appears. In this study, the lubrication conditions were detected on-line using contact resistance and bulk temperature measurements, which were applied to a modified FZG gear test device. Measurements were made with polished gear surfaces at operating conditions that are typical of industrial gears. The presented mean contact resistance includes the data points in different positions along the line of action and thus also considers transient effects. The bulk temperature and trend curves of the mean contact resistance at different pitch line velocities, loads, and oil inlet temperatures are reported and discussed as measures for analysing the lubrication condition.

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“…Fajdiga et al investigated the contact fatigue of spur gear pair by considering the EHL condition. By introducing the thermal effect, Wang et al proposed a transient thermal EHL model of spur gear by using simplified multigrid method. Xu systematically studied the EHL problems of spur, helical, and hypoid gears and derived a novel friction coefficient formula for mechanical efficiency analysis.…”

Section: Introductionmentioning

confidence: 99%

Thermal elastohydrodynamic lubrication analysis of helical gear pair under starved lubrication condition

Liu

Zhang

et al. 2019

Lubrication Science

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In the present study, thermal starved elastohydrodynamic lubrication (EHL) model is developed for a helical gear pair. The influences of inlet oil‐supply layer, input speed, lubricant viscosity, and surface roughness on the lubrication behaviour are investigated. The minimum film thickness, temperature rise of teeth surfaces and oil film, and the friction coefficient are predicted along the line of action (LOA). Results show that the effects of inlet oil‐supply layer, input speed, and lubrication viscosity on the tribological performance are remarkable. Under the starved lubrication, the influence of inlet oil supply on the temperature rise is insignificant. Meanwhile, the effect of surface roughness has been discussed. It reveals that the roughness texture along the entrainment velocity direction has significant influence on the lubrication characteristics. The results provide the tribological guidance for design of a helical gear pair in engineering.

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Transient thermoelastohydrodynamic lubrication analysis of an involute spur gear

Cited by 94 publications

References 7 publications

Modeling and Analysis of the Meshing Losses of Involute Spur Gears in High-Speed and High-Load Conditions

Modeling and Analysis of the Meshing Losses of Involute Spur Gears in High-Speed and High-Load Conditions

Evaluation of lubrication conditions in gear contacts using contact resistance and bulk temperature measurements

Thermal elastohydrodynamic lubrication analysis of helical gear pair under starved lubrication condition

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