Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Manufacturing, Materials and Metallurgy; Microturbine 2008
DOI: 10.1115/gt2008-50377
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Design, Fabrication, and Performance of Foil Gas Thrust Bearings for Microturbomachinery Applications

Abstract: A methodology for the design and construction of simple foil thrust bearings intended for parametric performance testing and low marginal costs is presented. Features drawn from a review of the open literature are discussed as they relate to bearing performance. The design of fixtures and tooling required to fabricate foil thrust bearings is presented, using conventional machining processes where possible. A prototype bearing with dimensions drawn from the literature is constructed, with all fabrication steps … Show more

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Cited by 13 publications
(13 citation statements)
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“…This model can further be employed to analyze the performance of other types of bump-type GFTBs. 33,37…”
Section: Resultsmentioning
confidence: 99%
“…This model can further be employed to analyze the performance of other types of bump-type GFTBs. 33,37…”
Section: Resultsmentioning
confidence: 99%
“…Consequently, higher axial loads may cause the bump foil strips to deflect laterally (i.e. along the outward normal to the bearing surface) resulting in severe rubbing with the runner surface, especially when the thermal growth of the bump foil is considered; such pattern of top foil wear was reported by Dykas et al 24 for a foil thrust bearing with BFD-2 operating at a temperature of 425 C and under a constant axial load of about 7 kPa; (6) the bearing with BFD-3 can preserve a converging gas film under axial loading and without suffering from such zero deflection of the topfoil trailing edge. Moreover, the BFD-3 ensures a reasonable compliance at the outer section of the bearing; (7) for the introduced bearing designs, the maximum deflection that occurs at the parallelplanes region of the top foil is 3.6 mm and is too small to generate large changes in the gas-film pressure compared with the converging wedge effect; hence, the wedge effect dominates at these operating conditions (i.e.…”
Section: Resultsmentioning
confidence: 93%
“…Fortunately, the introduced configurations for the bump foil strips can be manufactured using bulge metal forming method presented by Dykas et al 24…”
Section: Increasing the Number Of Bumps (Bfd-5)mentioning
confidence: 99%
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