...Subrata Barman; Kritesh Kumar Gupta; Subrata Kushari; Sudip Dey This investigation presents the deterministic and stochastic responses of the journal bearing with a two-layered porous bush. Pressure equations in the porous layers and modified Reynolds equations in the clearance region are governed...

... and load capacity of the coupled journal-thrust bearing and the laminar flow assumption is no longer applicable to the actual operating conditions of the water-lubricated bearings at a high rotation speed. In addition, optimal micro groove depths for both journal bearing and thrust bearing exist to reach...

... and Valve-Train ,” Proc. Inst. Mech. Eng. J.: J. Eng. Tribol. , 232 ( 6 ), pp. 749 – 756 . 10.1177/1350650117727231 [10] Sander , D. E. , Allmaier , H. , Priebsch , H. H. , Witt , M. , and Skiadas , A. , 2016 , “ Simulation of Journal Bearing Friction in Severe Mixed...

... contact mechanics sag ratio gas (air) bearings hydrodynamic lubrication journal bearings References [1] Barnett , M. A. , and Silver , A. , 1970 , “ Application of Air Bearings to High-Speed Turbomachinery ,” SAE Technical Paper No. 700720. [2] Dellacorte , C...

... of T ribology . 30 08 2022 13 12 2022 21 12 2022 17 01 2023 bearings journal bearings rolling rolling element bearings rolling fatigue Tapered roller bearings are widely used in industrial machinery such as construction machinery, agricultural machinery...

...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...

... lubrication journal bearings rotordynamic seals e ~ = eccentricity (m) h ~ = gap function (m) h ¯ ~ = mean gap height (m) p ~ = pressure (Pa) F ~ = force on the rotor (N) L...

... 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...

... 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, such as centrifugal pumps, multiple narrow annular gaps like media...

... a problem in precision control of mechanisms, as discussed in the recent review paper by Huang et al. [ 1 ]. Experimental studies of hydrodynamic oscillatory journal bearings are scarce compared with their steady-speed counterparts. Table 1 provides bearing dimensional and duty specifications...

...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...

... hydrodynamic 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...

...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...

...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...

... journal bearings fault identification rotating systems diagnostics fluid film lubrication Conselho Nacional de Desenvolvimento Científico e Tecnológico 10.13039/501100003593 424899/2018-3 307941/2019-1 Fundação de Amparo à Pesquisa do Estado de São Paulo 10.13039/501100001807...

...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...

...-in scheme. This study provides a reference for formulating running-in specifications for sliding 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...

...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...