Enhancing stability of industrial turbines using adjustable partial arc bearings

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Chasalevris, Athanasios^1 ; Dohnal, Fadi^2

GE Oil and Gas, Newbold Road, Rugby

CV212NH, United Kingdom^1

Lindenstrasse 13, Wettingen

5430, Switzerland^2

关键词: Bearing properties;    High Speed;    Industrial turbines;    Partial arcs;    Periodical variation;    Rotor vibrations;    Stiffness and damping;    Variable geometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012152/pdf
DOI  :  10.1088/1742-6596/744/1/012152

来源: IOP

【 摘 要 】

The paper presents the principal of operation, the simulation and the characteristics of two partial-arc journal bearings of variable geometry and adjustable/controllable stiffness and damping properties. The proposed journals are supposed to consist of a scheme that enables the periodical variation of bearing properties. Recent achievements of suppressing rotor vibrations using plain circular journal bearings of variable geometry motivate the further extension of the principle to bearings of applicable geometry for industrial turbines. The paper describes the application of a partial-arc journal bearing to enhance stability of high speed industrial turbines. The proposed partial-arc bearings with adjustable/controllable properties enhance stability and they introduce stable margins in speeds much higher than the 1stcritical.