Determination of the lift-off speed in foil bearings using various measurement methods

• Autorzy: Bagiński P. , Żywica G.
• Języki publikacji: EN

Abstrakty

EN

One of the most important parameters describing the operation of foil bearings is the speed at which - under certain load conditions - a lubricating film is created. Knowing the value of this parameter, one can determine the nature of the operation of a rotor that is supported by these bearings. The lift-off speed is usually determined during the run-up and coast down of the rotor using the measured moment of friction as a function of the rotational speed. In this article, this method has been compared with other measurement methods proposed by the authors. The first method consisted in recording the temperature of the bearing’s top foil during its operation, while the second method was based on measuring the current-voltage characteristics of the electro-spindle used in the drive system. As a result of the conducted research, a simple method that allows determining the lift-off speed in foil bearings was proposed. This method can be applied to various types of high-speed machines, such as turbocompressors or microturbines.

Słowa kluczowe

EN

foil bearings; measurement methods; lubricant wedge; lift-off speed

PL

łożysko foliowe; metody pomiarowe; kliny smarne; prędkość oderwania

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2018
• Tom: Vol. 22, nr 2
• Strony: 415--424
• Opis fizyczny: Bibliogr. 19 poz., 1 fot. kolor., 1 rys., wykr.

Twórcy

autor

Bagiński P.

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

autor

Żywica G.

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

Bibliografia

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• [14] Feng, K., Zhao, X., Huo, C., Zhang, Z.: Analysis of novel hybrid bump-metal mesh foil bearings, Tribology International, 103, 2016.
• [15] Yan, J., Zhang, G., Liu, Z., Yang, F.: Static characteristics of gas foil thrust bearing based on gas rarefaction model, In Proceedings of the ASME Turbo Expo, 7A, 2015.
• [16] San Andres, L., Ryu, K., Kim, T. H.: Identification of Structural Stiffness and Energy Dissipation Parameters in a Second Generation Foil Bearing: Effect of Shaft Temperature, Journal of Engineering for Gas Turbines and Power, 133, 032501, 2011.
• [17] Sim, K., Lee, Y.-B., Song, J. W., Kim, J.-B., Kim, T. H.: Identification of the dynamic performance of a gas foil journal bearing operating at high temperatures, Journal of Mechanical Science and Technology, 28, 1, 43-51, 2014.
• [18] Duan, W., Sun, Y., Ding, C., Yu, L.: Structural Stiffness of X-750 Alloy Bump Foil Strips for Compliant Foil Bearings with Different Heat Treatments, Journal of Tribology, C, 2015.
• [19] Kim, T. H., Breedlove, A. W., San Andres, L.: Characterization of a Foil Bearing Structure at Increasing Temperatures: Static Load and Dynamic Force Performance, Journal of Tribology, 131, 041703, 2009.

Uwagi

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