Non-Newtonian Starved Thermal-Elastohydrodynamic Lubrication of Finite Line Contacts

Mihailidis, A.; Agouridas, Konstantinos; Panagiotidis, Konstantinos

doi:10.1080/10402004.2012.729298

Cited by 26 publications

(21 citation statements)

References 24 publications

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“…On the basis of the Navier-Stokes equation, the thermal EHL model of finite contact lines was established by Bruyere et al [17], considering the highly non-Newtonian behavior and thermal effects of lubricants. Mihailidis et al [18] proposed a new thermal EHL model of finite line contacts, taking into account the external profile of rollers, non-Newtonian properties, and starved lubrication characteristics. e edge-contact effect of finite contact lines on thermal EHL was studied by Najjari and Guilbault [19].…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al [21,22] mainly studied load and velocity effects on the thermal EHL performance of a helical gear pair. At present, most scholars [17][18][19][20][21][22] have studied thermal EHL models of finite line contacts, which consist of two cylindrical surfaces, the synthetic curvature of which is constant, so the EHL model is not needed to consider the scale effect of contact pairs.…”

Section: Introductionmentioning

confidence: 99%

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Thermal EHL Characteristics Investigation on Axle Box Bearings of Railway Vehicle Based on Slicing Method

Huo

Zhou²,

et al. 2019

Shock and Vibration

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Lubrication failures of axle box bearings can lead to accidents, such as bearing burnout and hot axle cutting. Presently, the modeling of the vehicle-track system dynamics rarely considers the nonlinear contact load of axle box bearings, and this leads to imperfection in the vehicle-track system dynamics calculation. And then, the load distribution and lubrication characteristics of axle box bearings are difficult to obtain. Therefore, in this paper, we fully consider the time-varying nonlinear contact load of bearings and track irregularity in establishing the bearing-wheel-rail system coupling-dynamics model. The dynamic response of axle box bearings is obtained by taking the vertical, strong impact-time-varying load on the carrying saddles as the external excitation. The load-balance equation of dynamic pressure lubrication is then obtained, according to the slicing method of bearing rollers. Finally, the elastohydrodynamic lubrication (EHL) model of axle box bearings is established considering thermal and scale effects. The results show that the central film thickness under thermal EHL was decreased by 13.61% compared with that under isothermal EHL. As the velocity of the contact pair increases, the thickness difference between thermal and isothermal EHL became larger. Thermal effects should be considered in the EHL model, in order to truly reflect the characteristics of EHL under a high speed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal EHL Characteristics Investigation on Axle Box Bearings of Railway Vehicle Based on Slicing Method

Huo

Zhou²,

et al. 2019

Shock and Vibration

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“…A newly developed EHL model (25) was employed in order to evaluate the friction coefficient. It is suited for the current case since it successfully converges when the two rubbing surfaces are moving towards opposite directions.…”

Section: Film Thickness and Friction Coefficientmentioning

confidence: 99%

Efficiency of a cycloid reducer

Mihailidis

Αθανασόπουλος

Okkas

2014

International Gear Conference 2014: 26th–28th August 2014, Lyon

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“…Moreover, Mohammadpour et al [6] indicated inlet and outlet boundary condition using entrainment flow with partial counter-flow in pure rolling EHL point contacts. Wolveridge et al [7], Yang et al [8] and Mihailidis et al [9] calculated the starved oil film thickness in the case of line contacts. Chevalier et al [10] pointed out that predicting the reduction in the oil film thickness is difficult in the case of completely starved lubrication where no meniscus lengths exist.…”

Section: Open Accessmentioning

confidence: 99%

Relationship between Supplied Oil Flow Rates and Oil Film Thicknesses under Starved Elastohydrodynamic Lubrication

Maruyama¹,

Saitoh²

2015

Lubricants

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Many studies have already considered starved lubrication. However, there have been no reports on the oil film thicknesses under steady starved EHL (elastohydrodynamic lubrication), where the ultra-low volume of oil supplied per unit time is uniform. The present study examined the relationship between the supplied oil flow rate and oil film thickness under steady starved lubrication. A ball-on-disk testing machine was used in experiments to measure the oil film thickness by means of optical interferometry. A microsyringe pump was used to accurately control the supplied oil flow rate. The supplied oil flow rate was kept constant, and the minimum oil film thickness was measured for 1 h after the start of the tests to determine the relationship between the supplied oil flow rate and oil film thickness.

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Non-Newtonian Starved Thermal-Elastohydrodynamic Lubrication of Finite Line Contacts

Cited by 26 publications

References 24 publications

Thermal EHL Characteristics Investigation on Axle Box Bearings of Railway Vehicle Based on Slicing Method

Thermal EHL Characteristics Investigation on Axle Box Bearings of Railway Vehicle Based on Slicing Method

Efficiency of a cycloid reducer

Relationship between Supplied Oil Flow Rates and Oil Film Thicknesses under Starved Elastohydrodynamic Lubrication

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