Results 1 to 10 of about 1,204 (264)

Linear and Nonlinear Performance Analysis of Hydrodynamic Journal Bearings with Different Geometries

Applied Sciences (Switzerland), 2022
In rotor dynamics, a traditional way of representing the dynamics of hydrodynamic bearings is using stiffness/damping coefficients. It is thus necessary to carry out a linearization of hydrodynamic forces around the shaft’s equilibrium position. However,
Diogo Stuani Alves, Tiago Henrique Machado, Machado Tiago Henrique   +2 more
exaly   +3 more sources

Numerical analysis and optimization of continuous texture geometries in thermo-hydrodynamic journal bearings [PDF]

Scientific Reports
Journal bearings play a critical role in many engineering systems, where their performance directly affects operational efficiency and reliability. This study investigates the effect of surface texturing on the thermo-hydrodynamic (THD) behavior of ...
Omar A. Keshk, Hassan ELGamal, Ossama Mokhiamar, Ahmed M. Saleh   +3 more
doaj   +2 more sources

Modelling and Simulation of Aerodynamic Cylindrical Bearings Using ANSYS Hydrodynamic Bearing Element Types

Vehicles, 2023
Modern power engine concepts and environmental restrictions demand oil-free lubrication of rotors, for example, by gas bearings. However, the stiffness and damping properties ruling the rotor’s dynamics are poorly documented for aerodynamic bearings and ...
Katrin Baumann, Hermann Freund
doaj   +1 more source

Run-Up Simulation of a Semi-Floating Ring Supported Turbocharger Rotor Considering Thrust Bearing and Mass-Conserving Cavitation

Lubricants, 2021
The vibration behaviour of turbocharger rotors is influenced by the acting loads as well as by the type and arrangement of the hydrodynamic bearings and their operating condition.
Christian Ziese, Cornelius Irmscher, Steffen Nitzschke, Christian Daniel, Elmar Woschke   +4 more
doaj   +1 more source

Development of a Robust Test Rig for Tilting Pad Journal Bearing Validation

Machines, 2022
Several theoretical models for predicting the performance of tilting pad journal bearings (TPJB) have been developed by the scientific community over the years.
Danilo Alvaro da Silva, Gregory Bregion Daniel, Katia Lucchesi Cavalca   +2 more
doaj   +1 more source

Investigation of the Wear Resistance of a Journal Bearing with Polymer-Coated Grooved Support Ring

Advanced Engineering Research, 2023
Introduction. In modern heavy-loaded friction units, metallopolymer coated bearings operating in the boundary friction mode are widely used. Their successful application is provided by the viscoelastic deformation of these coatings under load.
V. V. Vasilenko, V. I. Kirishchieva, M. A. Mukutadze, V. E. Shvedova   +3 more
doaj   +1 more source

Investigation of Microflow Effects in Textures on Hydrodynamic Performance of Journal Bearings Using CFD Simulations

Lubricants, 2023
Adequately designed and positioned surface textures are recognized as a promising way to increase load-carrying capacity and reduce frictional losses of journal bearings.
Yujun Wang, Georg Jacobs, Florian König, Shuo Zhang, Stephan von Goeldel   +4 more
doaj   +1 more source

Theoretical Analysis and Optimum Design of High Speed Air Film Thrust Bearings

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2007
Hydrodynamic air film thrust bearings are widely used for very high speed, lightly loaded rotating machinery such as gas expander, compressor, gyroscope and business machines, etc. In the design of hydrodynamic air film thrust bearings, it is of cardinal
Hiromu HASHIMOTO, Masayuki OCHIAI, Tadashi NANBA   +2 more
doaj   +1 more source

Turbulence Effects in Tilting Pad Journal Bearings: A Review

Lubricants, 2022
This paper reviews the current knowledge on turbulence effects in tilting pad journal bearings. Turbulence is becoming increasingly important in the design of hydrodynamic bearings due to the trend to increase power density in turbomachines and ...
Alberto Betti, Paola Forte, Enrico Ciulli   +2 more
doaj   +1 more source

The Tin Coatings Utilisation As Blood Contact Surface Modification In Implantable Rotary Left Ventricle Assist Device Religaheart Rot

Archives of Metallurgy and Materials, 2015
Constructions of the mechanical-bearingless centrifugal blood pumps utilize different types of non-contact physical bearings, which allows to balance the forces that have an impact on the pump impeller, stabilizing its position in the pump house without ...
Kustosz R., Altyntsev I., Darlak M., Wierzchoń T., Tarnowski M., Gawlikowski M., Gonsior M., Kościelniak-Ziemniak M.   +7 more
doaj   +1 more source