Results 91 to 100 of about 137 (128)

Design of aerostatic journal bearings with partially porous walls

International Journal of Machine Tool Design and Research, 1978
Abstract Steady-state characteristics of aerostatic journal bearings fed through rows of porous inserts are investigated. The use of a simplified mathematical model allows to derive relationships for the load-capacity, the stiffness, the gas flow rate and the power consumption of the bearing, as functions of the supply pressure, the relative ...
M. Szwarcman, R. Gorez
openaire   +1 more source

An internally pressurized aerostatic journal bearing for thermoacoustic engines

Tribology International, 2016
Abstract An internally pressurized aerostatic journal bearing suitable for thermoacoustic power converters is designed and experimentally demonstrated using a free piston oscillating in a cylinder between two gas springs. The oscillating pressures in a thermoacoustic power converter׳s cavities can be used to create a near constant flow through an air
Claudio U. Hail, Philip C. Knodel, John G. Brisson   +2 more
openaire   +1 more source

Analysis of an aerostatic journal bearing with a position-sensing restrictor

Wear, 1981
Abstract A variable restrictor, in which the position of the journal is used to change the restrictor resistance, is described. A mathematical model is proposed to study the pressure distribution and air flow in the bearing. The effect of various design parameters on bearing performance characteristics such as the non-dimensional load-carrying ...
PANDE, SS, SOMASUNDARAM, S
openaire   +2 more sources

Studying fluid squeeze characteristics for aerostatic journal bearing

Physica B: Condensed Matter, 2008
The Reynolds equation for studying fluid squeeze of aerostatic journal bearing is solved numerically by considering the quasi-steady behavior of the air film. The radial displacement can influence the air film thickness modifying the pressure distribution in the journal-bearing gap.
openaire   +1 more source

Dynamics of a rotor-aerostatic journal bearings system with asymmetric air feeding

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2022
In 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
openaire   +2 more sources

Multi-recess aerostatic journal bearing with cyclic squeeze

Wear, 1972
Abstract 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.
openaire   +1 more source

The Seal System in Aerostatic Journal Bearings for High Vacuum Chambers

Journal of Tribology, 2004
This 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
openaire   +1 more source

Dynamic Stiffness and Damping Coefficients of Aerostatic, Porous, Journal Bearings

Journal of Mechanical Engineering Science, 1978
A 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
openaire   +1 more source

Research on load characteristics of aerostatic journal bearing with pocketed orifice-type restrictor

2014 20th International Conference on Automation and Computing, 2014
This 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
openaire   +3 more sources

Cyclic squeeze in tapered land aerostatic journal bearings

Wear, 1983
Abstract 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.
openaire   +2 more sources