Results 31 to 40 of about 146 (125)

A Design for High-Speed Journal Bearings with Reduced Pad Size and Improved Efficiency

Lubricants, 2022
Improving efficiency is a general task in the design process of high-speed journal bearings. A specific fixed-pad bearing geometry featuring reduced pad length and additional design measures with the intention of reducing frictional power loss is ...
Thomas Hagemann, Daniel Vetter, Sören Wettmarshausen, Michael Stottrop, Alexander Engels, Christoph Weißbacher, Beate Bender, Hubert Schwarze   +7 more
doaj   +1 more source

Coupled Model of Point-Contact Thermo-Elastohydrodynamic Lubrication and Dynamics with Double-Impact Mechanism for High-Precision Quantitative Diagnosis of Rolling Bearings

Lubricants
Accurate quantitative diagnosis of spall sizes in rolling bearings is often hindered by the limitations of conventional dynamic models in characterizing temperature-dependent contact behavior.
Wei Jin, Chao Liu, Tongtong Liu, Jinfeng Huang, Chengshi Zhang, Feng Jin, Feibin Zhang, Chao Zhang   +7 more
doaj   +1 more source

Review article: Hadal-zone gearbox multi-physics lubrication dynamics: synergistic effects of hydrostatic pressure and thermal suppression [PDF]

Mechanical Sciences
Deep-sea gear transmission systems face critical lubrication challenges due to the combined effects of extreme hydrostatic pressure and cryogenic temperatures.
Y. Wang, X. Wang, J. Ruan, X. Chen, W. Zou   +4 more
doaj   +1 more source

On Friction Reduction by Surface Modifications in the TEHL Cam/Tappet-Contact-Experimental and Numerical Studies [PDF]

Coatings, 2019
The overall energy efficiency of machine elements and engine components could be improved by using new technologies such as surface modifications. In the literature, surface engineering approaches like micro-texturing and the application of diamond-like carbon (DLC) coatings were frequently studied separately, with focus on a specific model contact and
Max Marian, Tim Weikert, Stephan Tremmel
openaire   +1 more source

Analysis on Filtering Reducer Turning Arm Bearing Based on Thermal Mixed Lubrication

工程科学与技术, 2018
The lubrication state of the working interface of the filtering reducer turning arm bearing is affected by load,contact geometry,rough surface thermal effect and other factors.It is difficult to figure out the lubrication condition of the working ...
Xiaopeng WANG, Wenyu PENG, Hongliang TIAN, Xinze ZHAO, Meiyun ZHAO   +4 more
doaj  

Analysis of Gear System Dynamics Based on Thermal Elastohydrodynamic Lubrication Effects

Lubricants
Lubrication plays a crucial role in reducing gear surface damage and defects such as pitting, wear, and scuffing; therefore, analyzing the influence of lubrication is essential for preventing such failures in gear transmission systems.
Zhaoxia He, Xiangjun Wang, Yinan Li, Yunfei Yang   +3 more
doaj   +1 more source

A Mixed-TEHL Analysis of Cam-Roller Contacts Considering Roller Slip: On the Influence of Roller-Pin Contact Friction

Journal of Tribology, 2018
In this work, a mixed lubrication model, applicable to cam-roller contacts, is presented. The model takes into account non-Newtonian, thermal effects, and variable roller angular velocity. Mixed lubrication is analyzed using the load sharing concept, using measured surface roughness.
Alakhramsing, Shivam S., de Rooij, Matthias B., Akchurin, Aydar, Schipper, Dirk J., van Drogen, Mark   +4 more
openaire   +1 more source

Analysis of Thermal Elastohydronamic Lubrication of Inclined Double-roller Enveloping Hourglass Worm Drive

Jixie chuandong, 2018
To improve the lubrication performance,anti-scuffing capacity and efficiency of enveloping worm,the elastohydrodynamic lubrication（ EHL） line contact model is established based on the research of meshing performance of inclined double-roller enveloping ...
Ou Yue, Li Jinkuan, Zhu Yan, Liu Zaixin, Liao Honghui   +4 more
doaj  

A Computational Fluid Dynamics Study on Shearing Mechanisms in Thermal Elastohydrodynamic Line Contacts

Lubricants, 2019
A computational fluid dynamics (CFD) model of the thermal elastohydrodynamically lubricated (EHL) line contact problem has been developed for the purpose of exploring the physical processes that occur inside a thin EHL film subjected to shearing motion ...
Marko Tošić, Roland Larsson, Janko Jovanović, Thomas Lohner, Marcus Björling, Karsten Stahl   +5 more
doaj   +1 more source

In Situ Measurement and Mapping of Lubricant Film Temperature in Cylindrical Roller Thrust Bearings Using Thin-Film Sensors

Machines
This study explores the in situ measurement of contact temperature in thermo-elastohydrodynamic lubrication (TEHL) within cylindrical roller thrust bearings (CRTBs) utilizing vapour-deposited resistive thin-film sensors.
Manjunath Manjunath, Patrick De Baets, Dieter Fauconnier   +2 more
doaj   +1 more source