The paper deals with the experimental analysis of the torque and of the lift-off velocity of a foil thrust bearing. The geometric characteristics of the foil thrust bearing follow the design recently proposed by Dykas et al. (2009, “Design, Fabrication, and Performance of Foil Gas Thrust Bearings for Microturbomachinery Applications,” ASME J. Eng. Gas Turbines Power, 131(1), p. 012301-1). A dedicated test rig was developed and enables the measurement of the speed, the torque, and temperatures under the foils. The measurements underlined the importance of managing heat transfer in a foil thrust bearing. Results are presented for mild static loads ranging from 5 to 60 N and rotation speeds comprised between 20 and 35 krpm. The value of the start-up torque was validated by comparisons with results obtained with a rapid camera.
Experimental Analysis of the Start-Up Torque of a Mildly Loaded Foil Thrust Bearing1
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Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received September 27, 2012; final manuscript received March 29, 2013; published online May 2, 2013. Assoc. Editor: Daniel Nélias.
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Balducchi, F., Arghir, M., Gauthier, R., and Renard, E. (May 2, 2013). "Experimental Analysis of the Start-Up Torque of a Mildly Loaded Foil Thrust Bearing." ASME. J. Tribol. July 2013; 135(3): 031702. https://doi.org/10.1115/1.4024211
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