Investigation of gas foil bearings with an adaptive and non-linear structure

• Autorzy: Żywica Grzegorz , Bagiński Paweł

Identyfikatory

DOI

10.2478/ama-2019-0001

• Języki publikacji: EN

Abstrakty

EN

The article discusses the results of simulation-based and experimental research carried out on gas foil bearings. Owing to the use of a set of flexible thin foils in such bearings, they exhibit certain beneficial features that cannot be found in other types of bearings. They have nonlinear operational characteristics and allow the dissipation of excess energy, thus reducing the vibration level. Moreover, gas foil bearings can self-adapt themselves to the current operating conditions by changing the shape of the lubrication gap. Therefore, they can be used to improve the dynamic performance of rotors, in particular, those operating at very high rotational speeds. This article explains the mechanisms for changes of stiffness and vibration damping in compliant components of a foil bearing. The results of the analysis of the bearing’s subassemblies using advanced numerical models are presented. They are followed by conclusions that were drawn not only from these results but also from the results of the experimental research. It has been proven that the rotor supported on carefully designed foil bearings is capable of maintaining a low vibration level, even if it operates at a high rotational speed.

Słowa kluczowe

EN

foil bearings; high speed rotor; adaptive structure; nonlinear stiffness

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Acta Mechanica et Automatica
• Rocznik: 2019
• Tom: Vol. 13, no. 1
• Strony: 5--10
• Opis fizyczny: Bibliogr. 25 poz., rys., wykr.

Twórcy

autor

Żywica Grzegorz

• Department of Turbine Dynamics and Diagnostics, Institute of Fluid Flow Machinery, Polish Academy of Sciences

autor

Bagiński Paweł

• Department of Turbine Dynamics and Diagnostics, Institute of Fluid Flow Machinery, Polish Academy of Sciences

Bibliografia

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Uwagi

The research was financed by the National Science Centre in Poland, under the research project No. 2016/21/D/ST8/01711 entitled ‘Examination and modelling of anti-vibration processes occurring in high-speed bearings with variable geometry’.

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).