Results 101 to 110 of about 153 (135)
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Dynamics of a rotor-aerostatic journal bearings system with asymmetric air feeding
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2022In this study, the effect of the symmetric and asymmetric air feeding on the dynamics of a shaft-aerostatic journal bearing system is theoretically investigated. In this scope, the pressure distribution of the air in the clearance is modeled with Reynold's equation and the lubrication forces are calculated using this distribution.
Abdurrahim Dal, Tuncay Karaçay
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Multi-recess aerostatic journal bearing with cyclic squeeze
Wear, 1972Abstract A theoretical analysis concerning load, flow and stiffness of an aerostatic journal bearing with several recesses is made. The solution is obtained numerically for a four-recessed finite journal bearing and results are presented in the form of performance curves.
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Measurement, 2018
Abstract The present study analyzed the influences of journal misalignment on the static and dynamic performance of aerostatic journal bearings. An effective numerical approach was proposed to solve the unsteady Reynolds equation. Based on this, the bearing’s static and dynamic characteristics under different misalignment angles were obtained.
Xinkuan Wang +4 more
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Abstract The present study analyzed the influences of journal misalignment on the static and dynamic performance of aerostatic journal bearings. An effective numerical approach was proposed to solve the unsteady Reynolds equation. Based on this, the bearing’s static and dynamic characteristics under different misalignment angles were obtained.
Xinkuan Wang +4 more
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Tribology International, 2017
Abstract The investigation of journal rotation and bearing surface waviness on the dynamic performance of aerostatic journal bearings is presented in this paper. The linear perturbation theory and an iterative procedure are proposed to solve the unsteady Reynolds equation.
Xinkuan Wang +4 more
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Abstract The investigation of journal rotation and bearing surface waviness on the dynamic performance of aerostatic journal bearings is presented in this paper. The linear perturbation theory and an iterative procedure are proposed to solve the unsteady Reynolds equation.
Xinkuan Wang +4 more
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The Seal System in Aerostatic Journal Bearings for High Vacuum Chambers
Journal of Tribology, 2004This paper investigates the performance of a seal system for an aerostatic journal bearing used in a high vacuum chamber. The seal system consists of axially spaced viscous seals and annular exhaust grooves that are located between the viscous seals. Each exhaust groove is coupled to a separate vacuum pump in order to achieve a vacuum chamber pressure ...
S. Yoshimoto, Y. Yoshida, K. Yagi
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Dynamic Stiffness and Damping Coefficients of Aerostatic, Porous, Journal Bearings
Journal of Mechanical Engineering Science, 1978A periodic (displacement) disturbance is imposed on an aerostatic, porous, journal bearing of finite length under steady-state conditions. The dynamic pressure distribution is obtained by a pressure perturbation analysis of Reynolds equation and a modified flow continuity equation in a porous medium.
N. S. Rao, B. C. Majumdar
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Effect of surface waviness on the static performance of aerostatic journal bearings
Tribology International, 2016Abstract A numerical study of the effect of the bearing surface waviness on the performance of aerostatic journal bearings is presented. The finite difference method (FDM) and an iterative procedure are proposed to solve Reynolds equation and derive the air film pressure distribution.
Xinkuan Wang +5 more
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Research on load characteristics of aerostatic journal bearing with pocketed orifice-type restrictor
2014 20th International Conference on Automation and Computing, 2014This paper presents a simulation study of load characteristics of aerostatic journal bearing with pocketed orifice-type restrictor. In order to analyze the influence of characteristic parameters of aerostatic journal bearing and lubricating gas, the computational fluid dynamics (CFD) software, FLUENT, is adopted and the whole three-dimensional models ...
Dongxu Wu, Bo Wang, Xichun Luo
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Cyclic squeeze in tapered land aerostatic journal bearings
Wear, 1983Abstract The analysis of the squeeze film operation of tapered land aerostatic journal bearings is presented. By considering the quasi-steady behaviour of the air film, the Reynolds equation is solved for a known bearing geometry by a finite difference numerical technique.
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Dynamic Characteristics of Aerostatic Porous Journal Bearings With a Surface-Restricted Layer
Journal of Tribology, 2010Aerostatic porous bearings have been successfully applied to various precision devices such as machine tools and measuring equipment to achieve a higher accuracy of motion. However, aerostatic porous bearings have a disadvantage in that they are prone to cause pneumatic hammer instability.
Yuta Otsu +2 more
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