The Effect of Area Contact on the Static Performance of Multileaf Foil Bearings

Du, Jianjun; Zhu, Jianjun; Li, Bing; Liu, Dun; Song, Chao

doi:10.1080/10402004.2014.997907

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…According to Guenat and Schiffmann [161], herringbone grooved journal bearings, as compared with plain journal bearings, are more susceptible to moist air. The load-carrying capacity, which has improved with an expansion in the contact area between leaf foils, was determined using FDM by Du et al [91] and Li et al [92]. When the couple-stress parameter was increased, Laouadi et al [93] observed that the peak pressure, altitude angle, frictional losses, and side leakage were all reduced.…”

Section: Theoretical Research On Patbmentioning

confidence: 99%

“…According to Hu et al [109], the bump-type shim foilsupported new bore-compliant PATB has produced a smaller rotor orbit (with less vibration in both directions) than a traditional bump-type PATB. In comparison to traditional bump-type PATBs, the rotor supported on the innovative bore bearing exhibits significantly reduced subsynchronous vibrations, according to Liu et al [91]. By adding dampening, the metal mesh blocks' enhanced mesh density has resulted in less sub-synchronous vibration amplitudes.…”

Section: Experimental Research On Patbmentioning

confidence: 99%

See 1 more Smart Citation

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

CHAKRABORTY,

CHAKRABORTI

2023

Finnish J. Trib.

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In several applications demanding precise and ultra-precision movements, porous aerostatic thrust bearings had been employed as a crucial precision engineering component and enabling technology. By acting as a lubricant between the moving part and the stationary part in aerostatic bearings, pressurized air almost completely eliminates friction. Since air acts as the lubricant, oil-based lubricants leave no debris behind. The air prolongs the life of the substances by preventing them from slipping and wearing. The aerostatic type uses graphite as a porous film to disrupt the air uniformly over the surface, or a tiny hole is drilled through the centre of the bearing to let the air circulate and produce a thin layer between the components. With an increased reliance on computational and mathematical methodologies for design and bearing performance optimization, this review paper aims to present the state-of-the-art in aerostatic bearings advancement and research. It also conducts a critical analysis of their future research directions and development trends in the next ten years and beyond. Air bearings are utilized in the production of tools like lathes, CMM, and grinders because they are highly precise in their operation and decrease mistakes and production time. Air bearings are available in a variety of forms and sizes. The assessment of future trends and obstacles in aerostatic bearings investigation, as well as their prospective applications in the precision engineering sectors, concludes the study.

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Section: Theoretical Research On Patbmentioning

confidence: 99%

Section: Experimental Research On Patbmentioning

confidence: 99%

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

CHAKRABORTY,

CHAKRABORTI

2023

Finnish J. Trib.

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“…Related numerical models and experimental tests have been proposed to provide theoretical guidance. Du et al 14 presented a one-dimensional beam model for multi-leaf foil journal bearings considering the effect of surface contact between adjacent foils. Their research indicated that the contact area is beneficial for load capacity.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental studies on the thermal and static characteristics of multi-leaf foil thrust bearing

Guo

Hou

Zhao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Foil bearing is considered to be a promising supporting technology in high-speed centrifugal machinery. Due to the high-speed shearing effect in the viscous lubricant film, heat generation could not be ignored. In this paper, a thermo-elastic model of the multi-leaf foil thrust bearing is proposed to predict its thermal and static characteristics. In the model, modified Reynolds equation, energy equation, and Kirchhoff equation are solved in a coupling way. The contact area between the foil and welding plate is taken into account. Besides, the effect of cooling air on the bearing temperature is investigated. The ultimate load capacity and transient overload failure process of the bearing is analyzed and discussed. The effect of rotation speed on the bearing temperature is more obvious than that of the bearing load. The bearing temperature drops obviously by introducing the cooling air, and the cooling effect is improved with the supply pressure. The transient overload failure of the bearing occurs when the bearing load exceeds the ultimate value.

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“…Peng and Carpino (2009) proposed a mathematical model for bump foil journal bearings, which predicted the stiffness and damping coefficients of bump foil bearings and discussed the effect of the bearing compliance on the dynamic coefficients. Du and Zhu (2015) presented a mathematical model for multi leaf foil bearings, which considered the effect of surface contact between foils on bearing characteristics. DellaCorte and Valco (2000) presented a simple rule of thumb method calculating the load capacity of foil bearings.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of aerodynamic lubricated double-decked protuberant foil thrust bearing

Guo

Hou

Wang

et al. 2019

JAMDSM

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Double-decked protuberant foil bearing is a type of foil bearing that uses two stacking-up layers of protuberant foils as supporting structure. In preliminary experiments, wear failure of foil thrust bearing occurs occasionally due to excessive axial load in the bearing. Further improvement of the bearing performance is necessary for its better engineering application. In this paper, a numerical model of this kind of foil bearing is applied to predict its static characteristics. Reynolds equation and Kirchhoff equation are coupled via successive iterations of film pressure and foil deformation. A parametric study is conducted to improve the static characteristics of the bearing, which is conducive to load capacity improvement. The load capacity of the bearing is represented by the bearing load with the given nominal film clearance. Due to point and surface contact between the foils, distribution of protuberances plays an important role in the stiffness distribution of the protuberant foil thrust bearing. Effect of radial location of protuberances on bearing load is analyzed. Furthermore, parametric studies with different foil thickness and diameter are conducted for further optimization. The results indicate that large unevenness of stiffness distribution will deteriorate its static characteristics. Through adjustment of the radial locations of protuberances, static performance of the double-decked protuberant foil thrust bearing can be improved prominently under different operating conditions.

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The Effect of Area Contact on the Static Performance of Multileaf Foil Bearings

Cited by 12 publications

References 27 publications

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

Numerical and experimental studies on the thermal and static characteristics of multi-leaf foil thrust bearing

Numerical analysis of aerodynamic lubricated double-decked protuberant foil thrust bearing

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