نتایج جستجو برای: mixed lubrication
تعداد نتایج: 226212 فیلتر نتایج به سال:
In cold rolling of thin strips, i.e., foils (Thickness
High power industrial machinery such as steam turbines and large pumps use journal bearings as rotor supports because this type of bearing is a high load carrying capacity. However, abnormal operating conditions in the journal bearings will degrade machine performance, shorten life time and increase the risk of operation. Bearing condition monitoring can detect faults at early stage and hence m...
OBJECTIVES The lubrication of articulating cartilage surfaces in joints occurs through several distinct modes. In the boundary mode of lubrication, load is supported by surface-to-surface contact, a feature that makes this mode particularly important for maintenance of the normally pristine articular surface. A boundary mode of lubrication is indicated by a kinetic friction coefficient being in...
Effective lubrication performance of metal-on-metal hip implants only requires optimum conformity within the main loaded area, while it is advantageous to increase the clearance in the equatorial region. Such a varying clearance can be achieved by using non-spherical bearing surfaces for either acetabular or femoral components. An elastohydrodynamic lubrication model of a novel metal-on-metal h...
Relevance to family physicians Vaginal speculum examination is routinely performed by most family physicians, most commonly to obtain a Pap smear or to test for sexually transmitted infections, mainly Chlamydia trachomatis and Neisseria gonorrhoeae. The most common reason cited by women for not having routine speculum examination is pain during the examination.1 Whether or not lubrication will ...
Lubrication with ambient air is not quite generally applied. The best known application is the “foil bearing” in tape recording systems for audio, video and computer applications; where the gap height that is needed for effective lubrication may quite easily be attained. This air gap reduces tape friction and wear of tape and recording head substantially. On the other hand, though, the air gap ...
Enhanced basal lubrication and the contribution of the Greenland ice sheet to future sea-level rise.
We assess the effect of enhanced basal sliding on the flow and mass budget of the Greenland ice sheet, using a newly developed parameterization of the relation between meltwater runoff and ice flow. A wide range of observations suggest that water generated by melt at the surface of the ice sheet reaches its bed by both fracture and drainage through moulins. Once at the bed, this water is likely...
Abstract A numerical method is proposed to evaluate the effect of non‐Gaussian roughness on point contact elastohydrodynamic lubrication (EHL). mixed EHL model contact, considering roughness, developed. The oil film pressure in was controlled by Reynolds equation average flow, and asperity obtained rough surface micro‐contact model. influence parameters distribution, thickness profile ratio loa...
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