Influence of Free Water Droplets on Film Formation Under Point Contact Grease Lubrication

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU150538" target="_blank" >RIV/00216305:26210/23:PU150538 - isvavai.cz</a>
Result on the web
<a href="https://asmedigitalcollection.asme.org/tribology/article/145/7/074101/1159647" target="_blank" >https://asmedigitalcollection.asme.org/tribology/article/145/7/074101/1159647</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1115/1.4056944" target="_blank" >10.1115/1.4056944</a>

Result language
angličtina
Original language name
Influence of Free Water Droplets on Film Formation Under Point Contact Grease Lubrication
Original language description
The influence of the grease-water two-phase emulsion on the bearing tracks on the film formation has been studied by carrying out optical interferometry experiments on a ball disk test rig to observe the dynamic film-forming behavior of lubricating grease under steady-state and micro-oscillation conditions. It is found that free water causes a brief rise in the grease film under steady-state conditions, specifically due to the grease-water phase connecting the oil reservoirs on both sides. The experiment determines that the state of the phase before entering the elastohydrodynamic lubrication (EHL) contact is water-in-oil. For the reciprocating motion and oscillation, the effects of the amount of free water and the length of the motion stroke are discussed in detail. It is found that for reciprocating movements with long stroke lengths, the effect of free water is summarized to enhance the fluidity of the fibrous mass of the grease thickener in the first few cycles of the movement. For shorter stroke lengths, the effect of free water is a scouring effect on the contact zone grease after 100 cycles. This paper provides new insights into the effects that cause water pollution to the point of contact lubrication during the transformation from reciprocating motion to fretting.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20301 - Mechanical engineering

Project
<a href="/en/project/GA21-28352S" target="_blank" >GA21-28352S: Rheological properties of thin lubricating films in point contacts at transition to mixed lubrication</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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