... lubrication theory was developed. Multivariate operational parameters (compression ratio, −55°C–135 °C temperature, 0.1–0.5 m/s speed, 0.4–6.3 µm roughness) and geometric features (oil-trapping grooves) were systematically analyzed to evaluate micro-contact pressure, oil film thickness, friction and leakage...

...Yanshuang Wang; Zhiwei Feng; Xin Cao; Mingyu Zhang Purpose This study aims to the influence of grease consistency on oil film thickness, friction coefficient (COF) and wear. A novel vibration evaluation model for grease performance is proposed. Design/methodology/approach Measurements...

...Yanshuang Wang; Zhiwei Feng; Xin Cao; Mingyu Zhang Purpose This study aims to the influence of grease consistency on oil film thickness, friction coefficient (COF) and wear. A novel Replenishment evaluation model for grease performance is proposed. Design/methodology/approach Measurements...

...Michal Kráčalík; Boris Gigov; Michele Schirru; Fabio Tatzgern; Christoph Schneidhofer; Shreyas Vaman Jalikop; Georg Vorlaufer Purpose This study aims to develop a procedure to predict the lubricant film thickness of line contacts in real time. It is based on a model by Hamrock and Dowson (H&D...

... intensity method, the film thickness is calculated from the interferometer images which are captured by multiple-contact optical elastohydrodynamic lubricated test rig. Findings The test results reveal that polymers, both PMA and PIB, have a significant contribution to the film-forming capability...

...Punit Kumar Purpose The purpose of this paper is to introduce the concept of stationary inlet zone bump (IZB) for film thickness enhancement in unidirectional pure sliding elastohydrodynamic lubrication (EHL) line contacts and to investigate the effects of maximum Hertzian pressure (load...

... deformation and stress formation. Design/methodology/approach A journal bearing test rig was used to determine the effect of the applied load on the bearing friction, film thickness, lubricant film pressure, etc. A steady-state analysis was performed to obtain the bearing performance. Findings...

... optical elastohydrodynamic (EHL) test rig is constructed to investigate the influences of lubricant properties on film thickness and lubrication conditions at different working conditions. The film thickness is calculated according to the relative light intensity principle. The degree of starvation...

... shaft and input shaft) on grease isothermal lubrication properties are theoretically investigated by using multigrid methods. Findings The results indicate that the grease isothermal elastohydrodynamic lubrication (EHL) film thickness shape and pressure distribution shape of the TSUC are similar...

...Mukesh A. Bulsara; Dhananjay V. Bhatt; Kishore N. Mistry Purpose – The purpose of this paper is to present a measurement technique wherein the film thickness is measured in unfired condition for entire stroke length but without impairing the original condition of piston ring, liner and lubricant...

...Mukesh A. Bulsara; Dhananjay V. Bhatt; Kishore N. Mistry Purpose The aim of this paper is to develop a technique to measure the oil film thickness between piston ring and liner throughout the stroke, without impairing the surface properties of the piston ring and liner. Mechanical properties...