A Mixed TEHL Model for the Prediction of Thermal Effect on Lubrication Performance in Spiral Bevel Gears

Wang, Daofei; Ren, Si; Zhang, Ying; Pu, Wei

doi:10.1080/10402004.2019.1688442

Cited by 13 publications

(6 citation statements)

References 28 publications

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“…h, p, and T, exhibit different variation trends in different meshing stages, as observed from Figures 11 to 22 and (c) measured by Omasta et al 35 13. The R x , R y , |u e | gradually increase, and p h decreases sharply in t 1 2 t 3 , so h increases significantly, whereas p and T decrease rapidly with t. In addition, S increase gradually while T decreases rapidly, enabling the viscosity of the lubrication to be recovered.…”

Section: Results Of Tehl With Smooth Tooth Surfacesmentioning

confidence: 59%

“…In order to verify the present TEHL model of VH-CATT cylindrical gear transmission, the film thickness distribution solved by the present model is compared with the data solved by Wang et al 22 and measured by Omasta et al 35 To ensure that the conditions for validation are identical, the same input parameters, solving domain, and the computing grid are obtained via from Wang et al 22 Table 2 and Figure 9 show that the central film thickness and film thickness distribution calculated by present model are substantially consistent with numerical simulation 22 and measured result 35 at same working condition. Thus, the TEHL model has a certain computational accuracy, and the error is small compared with the results in the literature.…”

Section: Model Validationmentioning

confidence: 99%

“…For instance, the effect of load and speed were introduced into the TEHL model of a helical gear. 21 In addition, Wang et al 22 presented a TEHL model of a spiral bevel gear, considering of the velocity vector and the surface roughness. Considering certain time-varying parameters along the meshing trace of a spiral bevel gear, the progressive mesh densification was introduced in the numerical calculation of a EHL model 23 and the behavior of dynamical wear, 24 friction, temperature, and contact fatigue 25 was subsequently discussed.…”

Section: Introductionmentioning

confidence: 99%

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TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

Luo

Liang

et al. 2022

Advances in Mechanical Engineering

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The lubrication characteristics of a cylindrical gear transmission with a variable hyperbolic circular-arc-tooth-trace (VH-CATT) are important theoretical bases for the tribology design of the gear and its fatigue life prediction. Existing lubrication characteristics studies of it are based on simplified linear contact models, which are limited to one specific meshing position only. Therefore, the mathematical models for tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA) are established to calculate most time-varying parameters in a meshing period, such as the kinematic parameters, spatial geometric parameters, and contact parameters, are calculated. Accordingly, a thermo-elastohydrodynamic lubrication (TEHL) model of an elliptical contact of this gear transmission is presented. Using all the proposed mathematical models, the TEHL results with smooth and rough tooth surfaces in a meshing period are analyzed. The obtained results reveal that these models can be used to predict the distribution of the film thickness, pressure, and temperature rise on the smooth and rough tooth surfaces of VH-CATT cylindrical gear transmission in each contact area of a meshing period. And it shows that the time-varying parameters have great influences on lubrication performance. Furthermore, the lubrication mechanism in a meshing period is investigated systematically in VH-CATT cylindrical gear transmission.

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Section: Results Of Tehl With Smooth Tooth Surfacesmentioning

confidence: 59%

Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

Luo

Liang

et al. 2022

Advances in Mechanical Engineering

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“…When the contact is working under mixed TEHL conditions, in particular, a huge instantaneous rise in temperature will take place due to the direct contact between surface asperities. [10][11][12][13][14] This will generate significant thermal stress inside the solid, which will in turn inhibit the elastic deformation of the contact surface and reduce the lubrication performance in the contact area. These cases indicate a need to consider the effects of solid thermal stress and thermal expansion on TEHL.…”

Section: Introductionmentioning

confidence: 99%

Modeling the effects of solid thermal expansion and thermal stress on elastohydrodynamic lubrication

Wang

Jiang

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Temperature has a significant effect on the performance of elastohydrodynamic lubrication (EHL), and this topic has been extensively covered in many studies. These studies are focused on how temperature affects lubrication performance, without considering the effect of temperature on the deformation and the subsurface stress of the contact bodies. However, there will be a significant rise in temperature in the contact area under such conditions as high speeds, heavy loads, and high slide-roll ratios. This will generate significant thermal stress inside the solid, thus inhibiting the elastic deformation of the contact surface and impairing the lubrication performance in the contact area. In such cases, it is essential to consider the effects of solid thermal stress and thermal expansion on thermal elastohydrodynamic lubrication (TEHL). In this paper, a TEHL model that consider solid thermal expansion and thermal stress to solve point contact problems is developed. The effects of solid thermal expansion and thermal stress on pressure, film thickness, temperature, and subsurface stress are investigated. The results show that solid thermal expansion partially inhibits the elastic deformation of the contact surface, resulting in a decrease in film thickness and an increase in pressure. It is also found that solid thermal stress causes the subsurface von Mises stress of the upper contact body to increase and that of the lower contact body to decrease.

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“…Considering the surface roughness, the thermal EHL model, which analyzed the oil film thickness, oil film temperature and surface temperature, was established [20][21][22], and the effects of rotational speed and torque were investigated [21]. Wang et al and Gan et al [23,24] analyzed the temperature field and the effects of different lubricant conditions, respectively. The effects of surface roughness on surface temperature rise were studied and the results show that the temperature rise increases with the increased surface roughness [25].…”

Section: Introductionmentioning

confidence: 99%

A Modified Wear Model Considering Contact Temperature for Spur Gears in Mixed Elastohydrodynamic Lubrication

Zhou

Xing

et al. 2020

Tribol Lett

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In this study, a modified wear model considering contact temperature for spur gears in mixed elastohydrodynamic lubrication (EHL) is proposed. The contact temperature consists of bulk temperature and flash temperature. The bulk temperature is determined by the thermal network model, whereas the flash temperature is estimated through the published method. The bulk temperature, which was rarely included in the previous works, substantially has a considerable influence on the tooth wear in mixed EHL. It is also found that the lower contact temperature contributes to the reduction of gear wear depth. Furthermore, the effects of gear basic geometrical parameter and operating parameter on wear depth are investigated. The results show that the wear depth decreases with the increased tooth width, module, pressure angle and rotational velocity but increases with the surface roughness and torque. It indicates that wear resistance of tooth surfaces can be enhanced by optimising the design parameters of gear drives.

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A Mixed TEHL Model for the Prediction of Thermal Effect on Lubrication Performance in Spiral Bevel Gears

Cited by 13 publications

References 28 publications

TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

TEHL analysis of VH-CATT cylindrical gear transmission in elliptical contact considering time-varying parameters

Modeling the effects of solid thermal expansion and thermal stress on elastohydrodynamic lubrication

A Modified Wear Model Considering Contact Temperature for Spur Gears in Mixed Elastohydrodynamic Lubrication

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