Results 51 to 60 of about 62,392 (135)

An Advanced Approach for the Analysis of the Rotor Dynamics of a Ball Bearing Turbocharger

Engineering Proceedings
Turbochargers operate under highly transient conditions, which impose significant mechanical and thermal loads on their rotating components. When supported by ball bearings combined with squeeze film dampers, the rotor system exhibits complex nonlinear ...
Pavel Novotný, Jiří Vacula, František Kocman, Antonín Krmíček   +3 more
doaj   +1 more source

Study on the tooth surface wear characteristics of helical gears under mixed elastohydrodynamic lubrication [PDF]

Mechanical Sciences
Existing research on tooth surface wear of helical gears has insufficiently considered the complex and variable lubrication conditions between meshing tooth surfaces.
Z. Yin, Z. Yin, Z. Yin, B. Liu, C. Yang, H. Wang, X. Fu, J. Xu, Z. Fan   +8 more
doaj   +1 more source

Multiscale Homogenization-Based Modeling of Micro-EHL and Load-Bearing Performance in Textured Gear Interfaces

Applied Sciences
In the ElastoHydrodynamic Lubrication (EHL) meshing contact model for rough interfaces with convex–concave textured micro-asperities, the geometric morphology of the meshing interface exhibits pronounced multiscale characteristics: the macroscale ...
Weiqiang Zou, Xigui Wang, Yongmei Wang, Jiafu Ruan   +3 more
doaj   +1 more source

Viscosity Loss in PFPE Lubricant for Space Applications under EHL Conditions

Tribology Online, 2007
An unbranched perfluoropolyether (PFPE) 815Z is the current ball bearing lubricant for space applications. Measurements of elastohydrodynamic lubrication (EHL) oil film thickness have been carried out to assess the lubricating performance of PFPE with ...
Sobahan Mia, Hidekazu Komiya, Shinichiro Hayashi, Shigeki Morita, Nobuyoshi Ohno, Shingo Obara   +5 more
doaj   +1 more source

Robust Numerical Solution for Solving Elastohydrodynamic Lubrication (EHL) Problems using Total Variation Diminishing (TVD) Approach

, 2017
In this study, we propose a class of total variation diminishing (TVD) schemes for solving pseudo-monotone variational inequality arises in elasto-hydrodynamic lubrication point contact problem. A limiter based stable hybrid line splittings are introduced on hierarchical multi-level grid.
openaire   +2 more sources

Effect of TiO₂ and SiO₂ Nanoparticles on Traction, Wear, and High Shear Viscosity of PAG Lubricants Under Elastohydrodynamic (EHL) Conditions for Refrigeration Systems

This study tests TiO₂ and SiO₂ nanolubricants in PAG oil using a Mini Traction Machine and an Ultra Shear Viscometer. The loads were 20 N and 40 N. The entrainment speeds ranged from 2.5 to 500 mm per second. The slide to roll ratio ranged from 25 to 150 percent. The nanoparticle concentrations were 0.01, 0.03, and 0.05 percent. The ball size was 19.05
Sharif Mohd Zaki, Mohd Syafiq Abd Aziz, Ismail Mohd Farid, Abdollah Mohd Fadzli, Abdul Aziz Mohamad Redhwan, Ngatiman Nor Azazi, Ramadhan Anwar Ilmar   +6 more
openaire   +1 more source

Multi-scale analysis of the roughness effect on lubricated rough contact [PDF]

, 2014
Determining friction is as equally essential as determining the film thickness in the lubricated contact, and is an important research subject. Indeed, reduction of friction in the automotive industry is important for both the minimization of fuel ...
DEMIRCI, Ibrahim
core  

Modeling and Analysis of Thermal Elastohydrodynamic Lubrication Characteristic of Asymmetric Gear with a Small Number of Teeth

Jixie chuandong, 2016
The asymmetric gear with a small number of teeth has the advantages of small size,large transmission ratio and high load capacity and so on,it is more and more widely used in various fields.
Deng Xianzhi
doaj  

Effect of boundary slips on thermal EHL in simple sliding finite line contact considering limiting shearing stress

Friction
With the advancement of surface technology, boundary slip in lubrication has become increasingly common. However, theoretical analysis in this area remains limited, necessitating further research to explore the impact of boundary slip, particularly ...
Mingyu Zhang, Jing Wang, C. H. Venner
doaj   +1 more source

Tailored Cage Shapes on Lubricant Migration and Friction Behaviours in Both Ball-Cage and EHL Contacts

Lubricants
The cage shape plays a critical role in controlling lubricant distribution and replenishment and enhancing lubrication performance within rolling bearings.
Kecheng Zhou, Xuyang Jin, Xinming Li, Qinghua Bai, Xiongrong Huang, Hao Jiang, Guohui Zhang, Feng Guo, Chenglong Liu, Jinjie Li   +9 more
doaj   +1 more source