... was carried out on a rolling bearing rig using the following two techniques: (i) vibration measurement and (ii) shock pulse measurement. A four-ball tester (Ducom Instruments, India) was used to characterize the tribological behavior of greases under the mixed lubrication regime as per the standard ASTM...

...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...

... 2023 28 06 2023 25 07 2023 fluid film lubrication hydrodynamic lubrication mixed lubrication seals surface roughness and asperities A part of the power from the aircraft engines is transferred to accessories with the help of a gearbox. As it is important to ensure good...

...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...

...Chunxing Gu; Li Dai; Di Zhang In order to explore the influence of different acceleration and deceleration forms on the bearing performance during acceleration and deceleration, an isothermal and mixed lubrication model for journal bearings was established. In this model, the fluid mechanics...

... at varying levels at different stages of gear meshing. time-varying mesh stiffness gear crack mixed elastohydrodynamic lubrication planetary gear system contact mechanics elastohydrodynamic lubrication friction mixed lubrication National Natural Science Foundation of China 10.13039...

... formulated engine oil under boundary and mixed lubrication conditions. The friction behavior of the coated material relative to uncoated materials is compared in boundary and mixed lubrication regimes. A traction-merging rolling speed in the mixed lubrication regime is observed, at which friction coefficient...

... observed in the boundary and mixed lubrication regimes. The mean wear scar diameters exhibited positive correlations with the amplitudes of vibration accelerations. The empirical equations provide basic information for the prediction of friction variation by measuring vibration signals. Email: natt.mta...

...Tie-jun Li; Yan-hong Yang; Yi-min Zhang; Chun-yu Zhao The existing fractal contact model fails to solve the problem of online real-time irregular curvilinear contact under mixed lubrication conditions. In this study, a novel arbitrary curve contact model is established, considering the actual...

... mixed lubrication seals two-phase flow CFD In the subsea oil and gas industry, multiphase pumping and wet gas compression systems have met challenges to work efficiently and reliably with process streams having time-varying gas volume fractions (GVF). Note that the interval between regular...

... on the three-dimensional (3D) tribodynamics of piston rings are limited. The tribodynamic model which couples the dynamics, mixed lubrication, and blow-by of piston-ring pack assemblies has not been found yet. Therefore, in this study, a 3D tribodynamic model of the piston-ring pack is developed considering...

.... 59 – 69 . 10.1016/j.bsbt.2016.05.002 [4] Zhang , H. , Hua , M. , Dong , G. N. , Zhang , D. Y. , and Chin , K. S. , 2016 , “ A Mixed Lubrication Model for Studying Tribological Behaviors of Surface Texturing ,” Tribol. Int. , 93 (Part B), pp. 583 – 592 . 10.1016...

... ournal of T ribology . 01 11 2021 20 01 2022 22 01 2022 14 02 2022 scuffing temperature gears mixed lubrication Gear scuffing failure is becoming one of the major challenges in electrical vehicle (EV) drivetrain design, attributed to significantly elevated...

... , “ Contribution of Gear Body to Tooth Deflections—A New Bidimensional Analytical Formula ,” ASME J. Mech. Des. , 126 ( 4 ), pp. 748 – 752 . 10.1115/1.1758252 [34] Zhu , D. , and Hu , Y. Z. , 2001 , “ A Computer Program Package for the Prediction of EHL and Mixed Lubrication Characteristics...

... lubrication. Conventional 2-body mixed lubrication is a special case of 3-body mixed lubrication analysis with particle size of zero. This study revealed that the values of real contact area, film thickness, contact mode, and the solid contact load in 3-body contact were larger than those in ideal 2-body...

... efficiency and its friction value under mixed-lubrication have been studied and discussed actively from around 1950 [ 1 – 8 ]. Churning loss [ 9 ] and windage loss [ 10 ] of gears have also been investigated. Several estimation equations for gear friction have been proposed [ 3 , 11 – 15 ]. In particular...

...@phytobokaz.fr Email: philippe.thomas@univ-antilles.fr Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology . 03 05 2021 28 07 2021 28 07 2021 27 08 2021 friction lubricant additives mixed lubrication solid lubricants...

... efficiency lubrication bearing design and technology bearings elastohydrodynamic lubrication friction mixed lubrication rolling rolling-element bearings sliding surface roughness and asperities The dynamic behavior of rolling elements in a ball bearing is dictated by surface traction...

... of carbide ceramics, promoting the hydrodynamic lubrication for carbide ceramics. B 4 C ceramic shows lower friction coefficients than those of SiC and B 4 C–SiC ceramics in boundary lubrication and mixed lubrication at 20 and 40 N. How does the tribochemical reaction affect the friction behavior...