On the Limiting Load-Carrying Capacity of Foil Bearings

Peng, Z-C.; Khonsari, M. M.

doi:10.1115/1.1792697

Cited by 49 publications

(27 citation statements)

References 9 publications

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“…From the trend of the curve, the calculated static loads can be assumed to eventually approach an asymptotic value when the speed increases to a certain value. These results agree well with the analysis results of Peng et al 30 and Bruckner. 22 The static load also increases with an increase in H at higher speeds, owing to the physical wedge effect.…”

Section: Parametric Analysis Of Static Characteristicssupporting

confidence: 95%

Parametric study on static and dynamic characteristics of bump-type gas foil thrust bearing for oil-free turbomachinery

Feng

Liu

Guo

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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Gas foil bearings have bright application prospects in oil-free turbomachinery such as aircraft air cycle machines, compressors, and gas turbines. To extend the applicability of foil bearings to high-speed and heavy-load systems, the axial force produced primarily by the pressure difference between the turbine and compressor sides must be taken into consideration. The thrust disc of the rotor is typically used to sustain the axial force and maintain the attitude of the rotor in a rotor-bearing system. In an analytical model used to predict the performance of gas foil thrust bearings, fluidstructure interaction must be considered because of the coupling effects of hydrodynamic lubrication and the compliance of bearing surface. In this study, a link-spring structural model was employed to calculate the equivalent vertical stiffness of the bump foil. This model exhaustively considered the effect of three factors: flexibility of the bump foil, interactions between bumps and frictional forces at the contact surfaces. In addition, top foil deflection that directly affects film thickness is calculated using a finite-element shell model. The static and dynamic characteristics of gas foil thrust bearings were predicted after solving the steady-state Reynolds equation and two linearized dynamic coefficient equations which were obtained with perturbation method by using finite-difference method. The structural deformation equation was substituted into the Reynolds equations in the calculation process. The calculated static load was compared with the published experimental data, and the results validated the theoretical analysis. Thereafter, the static and dynamic characteristics including impact of rotational speed, initial minimum film thickness and the ratio of the inlet to outlet film thicknesses were analyzed. Parametric studies were also conducted to evaluate the effect of different structural parameters of the bump foil and journal tilting on the static characteristics of gas foil thrust bearings. Because the proposed analytical model is completely algebraic, it can be easily programmed for accurately and effectively investigating the performance of gas foil thrust bearings.

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Section: Parametric Analysis Of Static Characteristicssupporting

confidence: 95%

Parametric study on static and dynamic characteristics of bump-type gas foil thrust bearing for oil-free turbomachinery

Feng

Liu

Guo

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…[1][2][3]. One of the most intricate applications of air-lubricated foil bearings can be found in magnetic tape drives [4], where a magnetic tape moves over a read/write head and tape drive components such as guides (stationary) and rollers (rotating).…”

Section: Introductionmentioning

confidence: 99%

Enhancing tribological performance of the magnetic tape/guide interface by laser surface texturing

2007

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“…The analytical procedure results shows that the bearing direct stiffness increases with rotor speed and generally decreases with increased bump compliance. Peng and Khonsari [11] determined the ultimate load capacity of ideal foil bearings, showing its dependency on the stiffness (compliance) of the support structure beneath the top foil. Kim and San Andŕes [12] Fig.…”

Section: Introductionmentioning

confidence: 99%

Load Capacity Analysis of Gas Foil Bearing (GFB) for Different Foil Materials

Jamir

Kakoty

2013

Lecture Notes in Mechanical Engineering

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There is a significant attention on GFBs in recent times owing to its oil free technology and suitability over a wide array of operating conditions. However GFBs have considerably low load carrying capacity compared to normal GFBs. The present paper investigated the load capacity of the bump-type GFBs for a simple model considering only deflection of bump foils. The load capacity of GFBs with different foil materials has been inspected in view of comparing the load capacity. Also the variations of GFBs load performance with respect to the compliance of the foil have been reviewed.

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On the Limiting Load-Carrying Capacity of Foil Bearings

Cited by 49 publications

References 9 publications

Parametric study on static and dynamic characteristics of bump-type gas foil thrust bearing for oil-free turbomachinery

Parametric study on static and dynamic characteristics of bump-type gas foil thrust bearing for oil-free turbomachinery

Enhancing tribological performance of the magnetic tape/guide interface by laser surface texturing

Load Capacity Analysis of Gas Foil Bearing (GFB) for Different Foil Materials

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