Tilting pad gas bearing design for micro gas turbines

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Nabuurs, M.J.H.W.^1 ; Al-Bender, F.^1 ; Reynaerts, D.^1

Department Mechanical Engineering, Katholieke Universiteit Leuven, Leuven, Belgium^1

关键词: Eigenvalue analysis;    Fully nonlinear;    Micro gas turbines;    Orbit simulations;    Rotor bearing dynamics;    Rotor instability;    Stiffness and damping;    Tilting pad bearings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012027/pdf
DOI  :  10.1088/1742-6596/476/1/012027

来源: IOP

【 摘 要 】

This paper presents the results of a dynamic stability investigation of a micro gas turbine supported by two flexible tilting pad bearings. The pad flexibility allows centrifugal and thermal shaft growth of the rotor but can also introduce undesirable rotor instabilities. An eigenvalue analysis on the linearised rotor-bearing dynamics is performed to estimate the required pad stiffness and damping for stability. Results of the eigenvalue analysis are evaluated by fully nonlinear orbit simulations.