...Yiming Han; Petr Sperka; Jing Wang; Ivan Krupka; Martin Hartl; Weimin Li; Xiaobo Wang; Weimin Liu 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...

... between the lubricating angle and sliding angle is made clear, and the lubricating angle is recommended to determine the lubricating weak point. The kinematic-geometric coefficient of oil film thickness is proposed to evaluate preliminarily the lubricating characteristics of the gear drive. This theory...

... years, many chemicals were screened for evaluating the bonding strength on silver surfaces. Finally, a mono-octadecanethiol (ODT) film was solidly bonded with silver surfaces in the laboratory utilizing an ultrasonic bath. To apply this technology for industry, the process must be tested in a real...

... on preferential load support by fillers. Recent studies found that tribochemical polarization of PTFE could trigger the formation of highly protective transfer films, thus resulting in exceptionally low wear-rates (k ∼ 10 −7 mm 3 /Nm) in certain composites. Although tribochemical interactions were believed...

..., and machining roughness. The distribution of the center film thickness of the LSR gear along the meshing line was predicted through an example the result of which was compared with a typical line contact EHL formula to verify the model. In addition, the difference was investigated in film thickness distribution...

... of the helical fluid film, mm h aL = axial fluid thickness of the left nut thread, mm h aR = axial fluid thickness of the right nut thread, mm h s = normal fluid film thickness, mm p s = steady-state pressure, Pa p z = disturbance pressure caused by Δ z , Pa/mm...

... shows that, with consideration of texture effect, the friction torque of the bearing is reduced, there exists an optimal texture parameter for a given film thickness, under which the bearing has the maximum load-carrying capacity, no obvious change rule is found for the volume flowrate...

... contact area dry friction films hardness sliding surface layers surface properties and characterization surfaces tribological systems wear The B4C monolayered coating PVD deposition process was carried out using an industrial CemeCom CC800/9ML PVD Unbalanced Magnetron Sputtering...

... boundary lubrication elastohydrodynamic lubrication films fluid film lubrication gears lubricants mixed lubrication tribological systems wear cooling heat transfer Modern jet engines for civil applications are characterized by high bypass ratios (BPR), high pressure ratios, and high...

...) linear time-varying (LTV) system. The system's film thickness and normal vibration are analyzed by Newmark- β method at two typical load cases. Results show that the new hybrid guideway's load capacity is greater than the hydrostatic guideway, and the normal vibration is small. Additionally...

...Zhaoli Liu; Hang Li; Jianliang Li; Jiewen Huang; Jian Kong; Dangsheng Xiong In this study, the Mo-alloyed HfN films were prepared by DC-magnetron sputtering and studied their tribological properties at 25–600 °C under dry friction conditions. The relationship between H/E value and tribological...

... and tribochemical properties of nitride samples. oxy-nitriding sulfur nitriding nitriding tribo-chemistry zinc dialkydithiophosphate films friction hardness lubricant additives lubricants surface layers surface properties and characterization surface treatments tribological systems wear...

...Sudesh Singh; Xinchun Chen; Chenhui Zhang; Rakesh Kumar Gautam; Rajnesh Tyagi; Jianbin Luo To explore the potential of directly grown multi-layer graphene as an agent in reducing friction and wear of steel on steel tribo-pair, multi-layer graphene films were synthesized on GCr15 steel in a low...

...Michael Branagan; Neal Morgan; Christopher Goyne; Roger Fittro; Robert Rockwell; Minhui He To compensate for an extremely heavy journal, jacking pockets can be added to the surface of pads in fluid film bearings. Jacking pockets can range in size and shape and will have an influence...

... , “ Enhancing Sealing and Dynamic Performance With Partially Porous Mechanical Face Seals ,” Tribol. Trans. , 37 ( 4 ), pp. 701 – 710 . 10.1080/10402009408983349 [22] Naduvinamani , N. B. , Hiremath , P. S. , and Gurubasavaraj , G. , 2001 , “ Squeeze Film Lubrication of a Short Porous...

...Jianzhong Cui; Jun Liu; Fangwei Xie; Cuntang Wang; Pengliang Hou The object of this work is to investigate the effect of the change of film pressure resulting from axial squeeze-film motion between driving and driven disks on the performance of hydroviscous drive (HVD). A simplified mathematical...

...Adolfo Delgado; Bugra Ertas The following paper focuses on an experimental and analytical study aimed at identifying the dynamic force coefficients of hydrostatic gas films for recessed flat plates. The motivation for the effort was brought upon by the necessity of generating more accurate models...

...David Nečas; Tomáš Jaroš; Kryštof Dočkal; Petr Šperka; Martin Vrbka; Ivan Křupka; Martin Hartl The present paper deals with an investigation of film formation in compliant lubricated contact. Despite these contacts can be found in many applications of daily life including both biological...

...Ce Guo; XiJing Zhu; Jia Liu; Dan Zhang During ultrasonic vibration honing (UVH), a thin hydrodynamic oil film formed can seriously affect the cavitation effect in the grinding fluid, but the mechanism is still unclear now. Based on the hydrodynamics theory, a revised cavitation bubble model...

...-BN can reduce coefficient of friction (COF) and improve antiwear property of composites under room temperature. Gr can accelerate the formation of transfer film under high temperature without sacrificing the wear resistant of composites. Transfer film of composites reinforced with Gr and h-BN...