... 2023 27 01 2023 10 02 2023 Email: jjdu@hit.edu.cn Email: HITChina_lcl@outlook.com Email: lijie@stu.hit.edu.cn contact mechanics gas (air) bearings hydrodynamic lubrication journal bearings Accepted Manuscript Not Copyedited Journal of Tribology. Received November 28...

..., and in transportation machinery such as automobiles and aircraft. For example, double row tapered roller bearings are often used as axle bearings in railway vehicles, which require high reliability. bearings journal bearings rolling rolling element bearings rolling fatigue Copyright © 2023 by ASME...

...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...

...-darmstadt.de bearings fluid-film lubrication hydrodynamic lubrication hydrostatic lubrication journal bearings rotordynamic seals References [1] Childs , D. W. , 1983 , “ Finite-Length Solutions for Rotordynamic Coefficients of Turbulent Annular Seals ,” ASME J. Lubr...

... support. The distribution of hydrodynamic pressure inside the bearing can be obtained by solving the Reynolds equation. Improving the efficiency of solving the Reynolds equation plays an essential role in the design and analysis of journal bearings. A numerical model has been developed to support...

... fluid film lubrication hydrodynamic lubrication hydrostatic lubrication journal bearings seals Allianz Industrie Forschung 10.13039/501100002723 19225/BG 2 Bundesministerium für Wirtschaft und Energie 10.13039/501100006360 03ET7052B In modern turbomachinery...

... with experimental trends. Fully hydrodynamic lubrication is predicted over a large range of load numbers for minimum oscillation amplitudes of approximately π/2 radians. hydrodynamic lubrication journal bearings Cylindrical fluid-film bearing systems subjected to non-reversing loading under oscillatory...

...Nathan Hess; Lizhi Shang This paper presents a machine learning neural network capable of approximating pressure as the distributive result of elastohydrodynamic (EHD) effects for a journal bearing at steady state. Design of efficient, reliable fluid power pumps and motors requires accurate models...

... lubrication journal bearings Ministry of Education and Science of the Russian Federation 10.13039/501100003443 MD - 129.2020.8. Most of the work in the field of active bearings is associated with electromagnetic bearings [ 1 – 5 ]. A comparative study of adaptive and non-adaptive...

...Jiaojiao Ma; Chao Fu; Weidong Zhu; Kuan Lu; Yongfeng Yang Misalignment is common in hydrodynamic journal bearings and the causes of it can be diversified, making the lubrication performance exhibits stochasticity. Lubricant viscosity often heavily depends on temperature, which may vary during...

... problems (LCPs), the coupling of film thickness h and density ratio θ disappeared. The modified equation achieved a new discrete scheme that ensured a complete second-order-accurate central difference scheme for the full film region, avoiding a hybrid-order-accurate discrete scheme. A journal-bearing case...

..., some rotor dynamic effects that are not considered in the mathematical model, such as misalignment. Another advantage of using AMBs is to set the shaft at a specific position inside the journal bearing. So, for experimental and numerical tests, the journal static position was maintained initially...

...Dongil Shin; Junho Suh; Alan B. Palazzolo This paper investigates the journal asymmetric temperature-induced thermal bow vibration of a rotor, as supported by a flexure pivot journal bearing (FPJB). Thermal bow-induced vibration, known as the Morton effect (ME), is caused by non-uniform viscous...

...Artur Schimpf; Markus Ortelt; Helge Seiler; Yandong Gu; Alexander Schwarzwälder; Martin Böhle This study describes experimental results using carbon fiber-reinforced carbon (C/C) material for porous journal bearings under static conditions. Exerted radial forces of up to 90 N, a supply pressure...

... of the pump pressure rise, is entirely supported by the hybrid journal bearings. Lubrication of these is accomplished using low viscosity aviation fuel, which makes the design and analysis of journal bearings particularly challenging. Furthermore, considering the operating conditions of these journal bearings...

... . 14 02 2021 16 08 2021 17 08 2021 08 09 2021 multi-stage running-in running-in quality friction coefficient phase trajectory journal bearings sliding National Natural Science Foundation of China 10.13039/501100001809 51705216 52005226 Natural Science...

... ournal of T ribology . 26 11 2020 11 08 2021 11 08 2021 03 09 2021 journal bearings thermoelastohydrodynamic lubrication The Morton effect (ME) occurs most frequently in high-performance, high-speed machines with rotors having large overhung masses, and supported...

...Jongin Yang; Alan Palazzolo Uncertainty in mixing coefficients (MCs) for estimating pad leading-edge film temperature in tilt pad journal bearings reduces the reliability of predicted characteristics. A three-dimensional hybrid between pad (HBP) model, utilizing computational fluid dynamics (CFD...

...S. Boedo This paper describes a computationally efficient, finite element implementation of a generalized short bearing (GSB) formulation to account for mass conservation in cavitated bearing regions. The method is applied to a set of examples representing partial and full journal bearings under...

...-rate, elastic deformation of the bearing, film thickness, fluid pressure, and contact pressure are calculated by the numerical model. Furthermore, the calculated results of the misaligned journal bearing are compared with those of the aligned journal bearing. The results show that the distributions...