Gas Foil Bearing Technology Enhanced with Smart Materials

Martowicz, Adam; Roemer, J.; Kantor, S. I.; Zdziebko, Paweł; Żywica, Grzegorz; Bagiński, Paweł

doi:10.3390/app11062757

Cited by 14 publications

(7 citation statements)

References 37 publications

(73 reference statements)

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“…Nowadays, to address the above-stated issues, various approaches are extensively investigated by the researchers for GFBs [10]:…”

Section: Introductionmentioning

confidence: 99%

Enhancement of dynamic properties for a gas foil bearing using structural components made of shape memory alloys – experimental study

2023

IJM

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Bearings are commonly employed in various types of rotating machineries.Their properties indisputably influence the overall performance and time of maintenance-free operation of the mechanical systems in which they are used to support the shafts. Consequently, much effort is considered to provide reliable bearings' solution and develop new methods and technical tools for measurement and possibly modification of the operational characteristics of the above-mentioned parts. In reference, the concept of a smart bearing is developed as providing the means for real-time passive and active control of the bearings' behavior as well as different types of smart materials are used to enhance their characteristics. The current study deals with an application of structural components made of shape memory alloys to gas foil bearings (GFB). The paper presents and discusses the results of experimental tests conducted for the bearing's prototype to characterize the efficiency of thermally-induced modifications of geometric properties of one of the crucial parts of the investigated GFB.

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“…Nowadays, to address the above-stated issues, various approaches are extensively investigated by the researchers for GFBs [10]:…”

Section: Introductionmentioning

confidence: 99%

Enhancement of dynamic properties for a gas foil bearing using structural components made of shape memory alloys – experimental study

2023

IJM

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“…Researchers have introduced many designs to ameliorate the above technical hurdle, such as thick top foil [7], three-pad structure [3], and metal mesh block [8]. Moreover, the possibility of applying novel smart structures [9] in GFJB is also explored, including the shape memory alloy and piezoelectric actuators [8]. Apart from these complicated schemes, GFJB with surface texturing on the top foil, namely, textured foil journal bearing (TFJB), is considered one of the simplest solutions [10] and has been attracting increasing attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Analysis of misalignment characteristics for textured foil journal bearing based on multigrid method

Xu,

Zhang,

Han

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Surface texturing is an excellent solution to the load capacity deficiency of foil journal bearings. However, it will also introduce significant discretization efforts. This paper explored the possibility of searching the static balance locus of textured foil journal bearing using the multigrid method to ensure design efficiency. The modified Reynolds equation characterized the ultra-thin gas film behavior inside bump-type foil bearing, and two foil models were adopted simultaneously to obtain the foil’s structural deflection. The predicted load capacity agreed well with the experimental data. The results indicate that multigrid can accelerate the solution process of the compressible pressure governing equation, and the speed can be increased up to 70% when the nonlinear discretization scheme is adopted. It is recommended that textures are located in the pressure-rising region along the shaft’s rotating direction and that the axial direction is fully textured to improve load capacity. Moreover, the above texture distribution scheme can increase the tolerable maximum misalignment angle by 11.8% and enhance the stability of rotors operated in light-load and high-speed cases.

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“…Moreover, the modified contact conditions between the bumps of the foils and the bushing, as well as the use of additional springs, are considered to change the elasto-damping properties [ 17 , 18 ]. Finally, various types of smart materials have been proposed to advantageously modify the thermomechanical properties of the bearings, including shape memory alloys, piezoelectric and thermoelectric materials [ 19 , 20 , 21 ]. Other structural modifications introduced to GFBs are presented in [ 2 , 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Characterization of a Gas Foil Bearing—A Novel Method of Experimental Identification of the Temperature Field Based on Integrated Thermocouples Measurements

Martowicz

Zdziebko

Roemer

et al. 2022

Sensors

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Maintenance of adequate thermal properties is critical for correct operation of a gas foil bearing. In this work, the authors present the results of the experimentally conducted thermal characterization of a prototype installation of the bearing. A novel method of temperature identification, based on integrated thermocouples readings, has been employed to determine the thermal properties of the specialized sensing top foil mounted in the tested bearing. Two measurement campaigns have been subsequently completed, applying freely-suspended and two-node support configurations, to gather complementary knowledge regarding the bearing’s operation. Apart from the rotational speed and temperature field measurements, the authors have also studied the friction torque and the shaft’s journal trajectories based on its radial displacements. The temporal courses for the above-mentioned quantities have enabled inference on the effects present during run-up, run-out and stable state operation at a constant speed. As confirmed, the applied distribution of the integrated sensors allows for temperature readings on the entire outer surface of the foil, and therefore, provides useful data for the bearing characterization. The work is concluded with presentation of the recommended directions regarding future improvements of the proposed measurement technique and more comprehensive study of the bearing’s characteristics.

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Gas Foil Bearing Technology Enhanced with Smart Materials

Cited by 14 publications

References 37 publications

Enhancement of dynamic properties for a gas foil bearing using structural components made of shape memory alloys – experimental study

Enhancement of dynamic properties for a gas foil bearing using structural components made of shape memory alloys – experimental study

Analysis of misalignment characteristics for textured foil journal bearing based on multigrid method

Thermal Characterization of a Gas Foil Bearing—A Novel Method of Experimental Identification of the Temperature Field Based on Integrated Thermocouples Measurements

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