New strategy for reducing the EHL friction in steel contacts using additive-formed oleophobic boundary films

Kalin, Mitjan; Kus, Maja

doi:10.1007/s40544-020-0403-2

Cited by 19 publications

(16 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The NEMD simulation results also suggested that larger reductions in friction might be possible in the high-pressure EHL regime, due to larger slip lengths [123]. This hypothesis was recently confirmed experimentally by Kalin and Kus [124], who showed that OFMs cause large reductions in friction compared to pure base oils under EHL conditions.…”

Section: Flow and Phase Behavioursupporting

confidence: 61%

Contributions of Molecular Dynamics Simulations to Elastohydrodynamic Lubrication

2021

View full text Add to dashboard Cite

The prediction of friction under elastohydrodynamic lubrication (EHL) conditions remains one of the most important and controversial areas of tribology. This is mostly because the pressure and shear rate conditions inside EHL contacts are particularly severe, which complicates experimental design. Over the last decade, molecular dynamics (MD) simulation has played an increasingly significant role in our fundamental understanding of molecular behaviour under EHL conditions. In recent years, MD simulation has shown quantitative agreement with friction and viscosity results obtained experimentally, meaning that they can, either in isolation or through the use of multiscale coupling methods, begin to be used to test and inform macroscale models for EHL problems. This is particularly useful under conditions that are relevant inside machine components, but are difficult to obtain experimentally without uncontrollable shear heating.

show abstract

Section: Flow and Phase Behavioursupporting

confidence: 61%

Contributions of Molecular Dynamics Simulations to Elastohydrodynamic Lubrication

2021

View full text Add to dashboard Cite

show abstract

“…Researchers have explored various techniques, including multilayer microstructure systems [8], surface patterning [9], and mechanical micro-structuring [10], to control uid transport by modifying the wettability of lubricants on surfaces. The wettability of liquid lubricants on solid surfaces can be tuned by utilizing organic additives with different molecular structures [11]. Thin lms of uororganic epilame have been employed as anti-spread barriers in micromachines for long-term lubrication [12].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of lubricant replenishment under limited lubricant supply in rolling bearings

Liu

Guo

et al. 2023

Preprint

View full text Add to dashboard Cite

This paper proposes a stripe-shaped surface pattern, aiming to enhance oil replenishment in rolling bearings that operate in challenging conditions where starved lubrication can result in failure. The pattern can be created through a chemical coating and applied to both sides of the bearing raceway, transforming it into a replenishment-augmented rolling element bearing (RaREB) that exhibits reduced friction. RaREB bearings facilitate better distribution and replenishment of lubricant in the bearing raceway, leading to enhanced anti-friction and extended service life, particularly in situations with limited lubricant supply. Test results confirmed the effectiveness of RaREB bearings in maintaining the desired thickness of the lubricating film and reducing friction torque. Additionally, a droplet transport simulation model was utilized to demonstrate the effect of the stepped wettability on oil replenishment. The proposed design holds practical significance for enhancing bearing performance in extreme operating conditions.

show abstract

“…In general, boundary slip occurs on both hydrophobic and hydrophilic surfaces, and the slip amount is typically at the micro and nanoscale [1][2][3]. For a tribo-pair with microscale clearance, once slip occurs or changes, the load-carrying capacity [4][5][6], friction [7][8][9] and flow characteristics [10,11] vary. The literature [12] indicates that producing and increasing boundary slip is an important means of accelerating the flow and improving the efficiency of micro-nanofluid systems.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of no-wear super-slip design of tribo-pair in load lifting and friction reduction

Hu¹,

Wang²,

Yang³

et al. 2023

Preprint

View full text Add to dashboard Cite

The concept of “super-slip design” is used to investigate the influence of multiple factors on the opening and frictional forces of a tribo-pair with microscale grooves. The results demonstrate that significantly improving the load-carrying capacity and reducing the viscous friction can be simultaneously realised by super-slip modification of the bottom surface of the hydrodynamic groove as a result of the joint action of the super-slip surface, groove geometrical parameters, and operating conditions. This is expected to further enhance the load-carrying capacity and reduce friction by applying shear stress on the interface of the liquid film and superslippery surface of the groove bottom. The superslippery surface does not fail because of rubbing, and the logical relationship between the performance parameters and groove depth changes unusually under this design.

show abstract

New strategy for reducing the EHL friction in steel contacts using additive-formed oleophobic boundary films

Cited by 19 publications

References 53 publications

Contributions of Molecular Dynamics Simulations to Elastohydrodynamic Lubrication

Contributions of Molecular Dynamics Simulations to Elastohydrodynamic Lubrication

Enhancement of lubricant replenishment under limited lubricant supply in rolling bearings

Mechanism of no-wear super-slip design of tribo-pair in load lifting and friction reduction

Contact Info

Product

Resources

About