... between the hydrodynamic and mixed lubrication regimes with the fluctuation in wind speed, which brings challenges to the long life of gearboxes. Decreasing the critical speed of the lubrication regime transition can help PGJBs expand the wind speed range operating under hydrodynamic lubrication...

... ), p. 041501 . 10.1115/1.4002542 [11] Wang , B. , Li , X. , Peng , X. , Li , Y. , Chen , Y. , and Jin , J. , 2024 , “ Thermoelastohydrodynamic Mixed Lubrication of Combined Rod Seals Operating at High Pressures and Speeds: Mathematical Modeling and Numerical Analysis...

...Shaoyu Zhu; Xiangjun Zhang; Jun Sun; Jie Zhu The dynamic behavior of journal bearing lubricated by non-Newtonian fluid (conforms to the Carreau model) during start-up is investigated. A mixed lubrication model consisting of a GT (Greenwood–Tripp) contact equation and a transient modified average...

.... The improvement in motor oil performance with the addition of CB was evident in the mixed lubrication regime, with a more than 20% reduction in frictional and wear losses compared to the reference motor oil. This improvement in the oil's lubrication performance is attributed to the presence of CB particles...

... lubrication friction surface power density mixed lubrication tribological system The main design criteria of gearboxes are (i) power density and load capacity; (ii) noise, vibration, and harshness; and (iii) efficiency and heat balance. Ever since it has been a goal to meet these criteria, but due...

... of bubbly oil bubble surface tension measurement of bubbly oil viscosity observation of bubble distribution mixed lubrication rheology Bubbly oil lubrication has been a focus of tribology researchers [ 1 – 3 ], which shows great potential for widespread application in high-speed mechanical...

... lubricating medium wettability gradient film-forming ability journal bearings lubricants mixed lubrication Water lubrication has become immensely popular due to its environmental friendliness, low cost, and good cooling performance, thereby, more and more stern shafts of ships have adopted water...

... mixed lubrication model to comparatively analyze the behaviors and performances of the HCRS with or without a cavity structure. The leakage control mechanism of the HCRS is revealed, namely that it is achieved by increasing the interface contact pressure and reducing the fluid film thickness through...

... phenomenon. Existing EHL models are modified for mixed lubrication and electrical contacts by incorporating a solid rough surface asperity contact model and a flow factor modified lubrication model. The model accounts for transient effects and considers changes in speed and other parameters during operation...

... ribology . 15 04 2024 12 07 2024 12 07 2024 11 09 2024 Graphical Abstract Figure thrust bearing misalignment topology optimization lubrication regime water lubrication fluid film lubrication hydrodynamic lubrication journal bearings mixed lubrication...

... for the engagement dynamics of a wet clutch. The numerical and experimental analyses demonstrate the importance of thermal effects when evaluating the dynamics of squeeze-film flow between two rotating disks. Heat transfer affects the viscous and mixed lubrication phases of the engagement process significantly...

...: (a) upstream, (b) inlet, and (c) outlet This study primarily focuses on water-lubricated bearings operating under severe working conditions such as low speeds, heavy loads, and impact loads. In these scenarios, lubrication typically occurs within the boundary or mixed lubrication regime. Therefore...

...S. Hutt; A. Clarke; H. P. Evans Lubricated non-conformal contacts, such as between gear teeth, operate with high levels of mixed lubrication, where the amount of direct asperity contact depends on operating parameters that influence the film thickness. Understanding of the levels of surface...

... 22 02 2024 25 03 2024 Graphical Abstract Figure loss of lubrication gears power loss frictional behavior scuffing boundary lubrication mixed lubrication surface properties and characterization tribological systems To reduce the fuel consumption of airplanes...

... Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology . 22 09 2023 30 01 2024 30 01 2024 26 02 2024 friction gears mixed lubrication Recently, the trend of electric vehicle (EV) shift in the automobile industry has been increasing...

...Bingqing Wang; Xiaoxuan Li; Xudong Peng; Yuntang Li; Yuan Chen; Jie Jin Thermoelastohydrodynamic (TEHD) mixed lubrication characteristics of a step-combined rod seal under high-pressure and high-speed conditions are analyzed in this article. A novel TEHD mixed lubrication model for combined rod...

... in the J ournal of T ribology . 12 04 2023 02 08 2023 04 08 2023 14 09 2023 grease tribology nanoparticle bearing vibration nano-CaCO 3 bio-lubricants grease lubrication lubricant additives mixed lubrication nano-tribology Grease is a semi-solid lubricant...

... hydrodynamic lubrication mixed lubrication seals surface roughness and asperities In 1992, Salant and Holmiller [ 6 ] conducted a parametric numerical study to understand the influence of the geometry of the grooves on the behavior of a liquid lubricated seal. The same authors showed...

...Chunjie Wei; Hui Song; Zhaowen Hu; Wei Wang The tribological performance of scrolls lubricated with CO 2 /oil mixture is investigated using a combination of the mixed lubrication model and the homogeneous model. The physical characteristics of the CO 2 /oil mixture were established prior to using...

... for publication in the J ournal of T ribology . 21 11 2022 03 02 2023 09 02 2023 07 03 2023 nitrogen-doped graphene friction and wear high temperature lubrication mechanism mixed lubrication nano-tribology piston rings wear mechanisms National Natural Science...