Record Details

A Comparative Study of the Dynamic Stability of a Rotor Supported by an Air-Bearing and an Air-ring Bearing

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title A Comparative Study of the Dynamic Stability of a Rotor Supported by an Air-Bearing and an Air-ring Bearing
 
Creator Muthanandam, Muruganandam
 
Subject Dynamic coefficients
Gas-lubricated
Hydrostatic journal bearing
Self-excited vibration
Stability threshold speed
 
Description 629-645
An exploration to justify the need for an air-ring around an air-bearing is done by comparing the dynamic stability plots of a rotor supported by air-bearings with and without an air-ring. Air-bearing with air-ring or air-ring bearing has pocketed feed-holes. The air-bearing without air-ring has plain feed-holes and it is referred to as air-bearing with a direct feeding system. A linearized free-vibration model rotor-bearing is used to analyze the dynamic stability. The dynamic coefficients of air-bearing with a direct feeding system and air-ring bearing are affected by whirl frequency due to the fluid compressibility effects. The stability threshold speed of the rotor air-ring bearing system is increased well above the threshold speed of the rotor air-bearing with a direct feeding system. The rotor critical mass of the rotor air-ring bearing system is smaller than that of the rotor air-bearing with a direct feeding system. The air-ring of air-ring bearing can prevent self-excited vibration in lightly loaded rotor-bearing systems.
 
Date 2023-11-21T04:49:20Z
2023-11-21T04:49:20Z
2023-11
 
Type Article
 
Identifier 0971-4588 (Print); 0975-1017 (Online)
http://nopr.niscpr.res.in/handle/123456789/62912
https://doi.org/10.56042/ijems.v30i4.5038
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJEMS Vol.30(4) [August 2023]