Micro-scale abrasive wear of some sealing elastomers

Farfán-Cabrera, Leonardo Israel; Gallardo-Hernández, Ezequiel Alberto; Rosa, C. Sedano-de la; Vite-Torres, M.

doi:10.1016/j.wear.2017.02.004

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…Besides, the low hardness of the EJB's coating (Sn alloy) promotes the indention of SiC particles, as reported for softer materials, namely, elastomers. 33 So, the abrasion caused at the ball was produced mainly by two-body abrasion of the SiC particles fixed in the EJB's surface since the hardness of SiC is higher than that of the steel ball used. Furthermore, the accumulations of SiC particles in the wear scar allowed the formation of a harder layer in the scar protecting the EJB's soft coating from the wear caused by the ball sliding.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the wear of engine journal bearings approaching severe lubrication conditions using a microabrasion tester

Hernández-Peña

Farfán-Cabrera

Gallardo-Hernández

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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Ideally, engine journal bearings are expected to operate under hydrodynamic lubrication regime to limit wear and promote minimal friction by sliding. Nevertheless, engine journal bearings fail since wear caused by severe conditions in actual engine operation, such as start/stop, misalignment, lubricant degradation, overheating, and debris contamination, producing a transition from hydrodynamic to mixed and boundary lubrication regimes and wear increased in both engine journal bearings and crankshaft. Thus, this work aims to study the influence of boundary lubrication, engine mineral oil aging, and debris contamination on wear of engine journal bearings. An adapted microscale abrasion tester using a ball-on-concave flat configuration was used to reproduce boundary lubrication under controlled conditions. Steel balls having a similar surface than crankshafts and concave flat samples cut from actual engine journal bearings were tested. The tests were run under boundary lubrication at a constant load, speed, and sliding distance at 26 ℃ and 100 ℃ using separately clean fresh and aged engine mineral oil, and then, tests were conducted using the oils contaminated with hard abrasive particles. The engine mineral oil was degraded by a laboratory aging process approaching oxidation of an engine mineral oil used in actual use conditions. Oxidation, additives depletion and changes in viscosity were evaluated. The wear volumes and scar morphologies of engine journal bearing samples were analyzed. The results suggested that high temperature was the main contributor for wear increase in engine journal bearings, while oil aging and debris did not influence considerably on the wear. However, the oils contaminated with hard particles produced a wear decrease in engine journal bearing samples but increased wear in rotary balls.

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Section: Resultsmentioning

confidence: 99%

Investigation of the wear of engine journal bearings approaching severe lubrication conditions using a microabrasion tester

Hernández-Peña

Farfán-Cabrera

Gallardo-Hernández

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…At the same time, under the action of extrusion and shearing force, the rubber produces a plowing to form grooves, tear lines, and ridges morphology. 50 When the texture area ratio is 5%, that is, the two pits are far apart, the lubricating medium stored in the pits is limited, and cause the friction surface quickly into dry friction, resulting in rubber wear being very large. With the increase of the texture area ratio, in the texture area ratio of 10%, the distribution of the lubricating medium is uniform, and the friction surface is relatively smooth.…”

Section: Number Of Textures (M )mentioning

confidence: 99%

Study of the effect of laser textured rotors on the starting performance of metal–rubber mating pairs under different lubricating media environments

Wang,

Huang,

Qian

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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To solve the problem of premature failure of the rubber stator of the screw pump due to wear, reduce the frictional resistance torque of the screw pump to solve the problem of difficulty in starting after the shutdown of the screw pump production system in Daqing Oilfield. The effects of micron dot texture and lubricating medium on the tribological properties of 42CrMo metal and acrylonitrile–butadiene rubber mating surfaces were studied by theoretical analysis and tribological tests. The friction coefficient, wear amount, and rubber wear morphology were used as the measurement indexes of drag reduction, wear resistance, and wear degree, respectively. The results showed that the best combination of texture area ratio and the lubricating medium was 10% silicone grease, the friction coefficient and wear amount were reduced by 11% and 10.7%, respectively, compared with untextured, and the main order of chip storage and oil supply effect was 10% > 5% > 15%.

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“…Nitrile butadiene rubber is usually utilized as the main material of the O-ring due to the characteristics of high elasticity, oil resistance, resistance to abrasion and reasonably good compliance to the contacting surface [1]. In the sealing process, the O-ring relies on its own elastic deformation to prevent the leakage of liquids or gases, thereby achieving the effect of self-sealing.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of surface roughness on improving the tribological performance of sealing pairs in magnetorheological damper

Li¹,

Xiu²,

Song³

et al. 2022

Smart Mater. Struct.

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Comprehension of the tribological behavior of magnetorheological fluid (MRF) is crucial in many fields, particularly those related to seal wear. The sealing conditions are more complex than traditional media due to composition and rheological characteristics of MRF. The sealing pairs are prone to wear failure when in contact with magnetic particles. To this end, the paper focuses on the influence of surface roughness on MRF tribological properties with and without magnetic field. The whole experiment is carried out by a self-developed device to reproduce the wear evolution between the sealing pairs for magnetorheological damper (MRD). Experimental results show that higher surface roughness exhibits lower friction coefficient and better friction performance under MRF, especially in the absence of magnetic field. This is in stark contrast to the best wear resistance exhibited by polished samples under MSO (Methyl Silicone Oil, a carrier fluid of MRF). This means that the effective coupling between surface roughness and iron particles helps to improve the friction and wear performance of sealing pairs. On this basis, the optimum surface roughness values of metal pin under MRF are obtained. Subsequently, the effect of pin surface morphology on the dynamics of iron particles are confirmed through the analysis of scanning electron microscopy (SEM) images. It is further demonstrated that wear mechanism varies with surface roughness, that is, as the roughness increases, from sliding to mixing, and finally to rolling. Consequently, this research is of great significance for improving the wear resistance of sealing pairs under MRF.

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Micro-scale abrasive wear of some sealing elastomers

Cited by 18 publications

References 20 publications

Investigation of the wear of engine journal bearings approaching severe lubrication conditions using a microabrasion tester

Investigation of the wear of engine journal bearings approaching severe lubrication conditions using a microabrasion tester

Study of the effect of laser textured rotors on the starting performance of metal–rubber mating pairs under different lubricating media environments

Experimental study of surface roughness on improving the tribological performance of sealing pairs in magnetorheological damper

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