Analysis of Two Surfaces in Line Contact under TEHL with Non-Newtonian Lubricants

Rattapasakorn, Sountaree; Mongkolwongrojn, Mongkol

doi:10.4028/www.scientific.net/amm.148-149.736

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Murched, Leong and Yang [8] founded that the effective thermal conductivity and viscosity of nanofluids were found to significantly increase with the particle volume fraction. Rattapasakorn and Mongkolwongrojn [9] showed a behavior of thin film lubricant with focusing on temperature effect of contact surface. It is found that the film pressure increase but film thickness decrease due to the temperature in the contact regime under TEHL.…”

Section: Introductionmentioning

confidence: 99%

Effect of Solid Particle on TEHL under Line Contact with Solid-Liquid Lubricant

Rattapasakorn

Mongkolwongrojn

2012

AMR

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The two infinitely long surfaces in line contact under thermoelastohydrodynamic lubrication with solid-liquid lubricants were investigated. The time-dependent modified Reynolds equation elasticity equation and the adiabatic energy equation have been formulated and solved numerically with initial conditions using multi-grid multi-level method with full approximation technique. The characteristics of the two surfaces in line contact under thermoelastohydrodynamic lubrication were presented as; film pressure, film temperature and oil film thickness profiles. The results of solid-liquid lubricants with micro-particle and nano-particle under thermal elastohydrohynamic lubrication were compared with the case of pure liquid lubricant.

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Section: Introductionmentioning

confidence: 99%

Effect of Solid Particle on TEHL under Line Contact with Solid-Liquid Lubricant

Rattapasakorn

Mongkolwongrojn

2012

AMR

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The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication

Huang

2020

Lubricants

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With the extensive coverage of the rail transit system, ensuring the safe operation of rail vehicles is an important prerequisite. Insufficient lubrication will cause friction and wear of axle box bearings, which is directly related to ensured safety of high-speed trains. A non-Newtonian elastohydrodynamic lubrication(EHL) between tapered rolling elements and inner ring of axle box bearing in high-speed trains was established by numeric simulation. The input parameters of working conditions, including velocity, acceleration and plastic viscosity, were changed, considering the actual application and their influence trends on film-forming characteristics were analyzed. As a result, a phase of acceleration of starting or a process of braking at a low speed tends to occur mixed lubrication. Therefore, a method of optimizing surface morphology of rolling elements was adopted to improve lubrication. Based on comparison experiments, it was recommended that RMS roughness was greater than 0.03 μm and less than 0.1 μm and kurtosis was three and skewness was negative in a range of −1 to −0.5 and texture direction was parallel to rotation direction. The optimized surface promotes the transition from mixed-lubrication to full film lubrication, which alleviated the problem of surface damage due to insufficient lubrication and prolongated the service life.

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Analysis of Two Surfaces in Line Contact under TEHL with Non-Newtonian Lubricants

Cited by 2 publications

References 5 publications

Effect of Solid Particle on TEHL under Line Contact with Solid-Liquid Lubricant

Effect of Solid Particle on TEHL under Line Contact with Solid-Liquid Lubricant

The Effect of Surface Morphology of Tapered Rolling Bearings in High-Speed Train on Grease Lubrication

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