author={Krzysztof Nalepa and Paweł Pietkiewicz and Grzegorz Żywica},
  journal={Technical Sciences},
Development of the bearing technology with deformable elements of the bearing sleeve utilization are presented in the paper. Foil or a set of foils with the viscoelastic properties comprise the deformable element. Foil bearing technology is utilized mostly in the high-speed turbo machines, such as the energetic microturbines. This results the bearing operating regime: high rotational speed, high temperature, work in the friction conditions during machine start-up and rundown. Three foil bearing… 

Development of Foil Bearings for Small Rotors

Lubricant free high speed turbo-machineries are one of the emerging fields in the gas turbine technology. Foil bearings are the major contenders in the lubricant free bearings due to their ability to

Influence of intermediate foil on airfoil bearings performance and exploitation properties ( STA 162-15 )

Air-foil technology is an interesting alternative for classic rolling or oil bearings in turbomachinery. It ensures low power losses, do not require external lubrication or pressurization and is

Experimental Investigation of a Foil Bearing Structure with a Polymer Coating under Static Loads

Gas foil bearings can operate at very high temperatures and rotational speeds. The operation under such conditions requires developing an appropriate bearing design, including the use of advanced

Performance of Thrust Airfoil Bearing for Oil-Free Turbomachinery

IntroductionDuring operation of any turbomachinery, the pressure distribution on rotor parts, i.e., impellers, causes an occurrence of radial and thrust forces. These forces must be transferred by

Unbalance Response of the Rotors Supported on Gas Foil Bearing Integrated with Active Magnetic Bearing

Gas Foil Bearings (GFBs) have fulfilled most of the requirements of novel oil-free turbomachinery. It has been considered as an alternative to traditional bearings in turbopumps, turbocompressors and

Experiments and predictions on the performance of double-bump foil bearings: Effects of bearing loads and height difference between bumps

The concept of multilayer bump foils was introduced in the design of bump foil bearings to produce a double-bump foil bearing, which can provide increased load capacity and damping by adding another

Comparable analysis of PID controller settings in order to ensure reliable operation of active foil bearings

In comparison to the traditional solutions, active bearings offer great operating flexibility, ensure better operating conditions over a wider range of rotational speeds and are safe to use. In order

Properties identification for gas foil bearings - experimental instrumentation and numerical approach

The authors introduce the numerical tools and methods proposed to model thermal diffusion and thermomechanical coupling in gas foil bearing and the proposed application of shape memory alloys to improve the elasto-damping properties of GFB.

Landing aerodynamics has leaves

This aerodynamic bearing sheets having a sleeve (4) inside which are arranged: - a said topsheet web (16), and - a corrugated sheet (14) disposed between the topsheet (16) and the sleeve ( 4), - a



Foil Air/Gas Bearing Technology — An Overview

This paper summarizes the chronological progress of foil air bearings for turbomachinery during the last 25 years. Descriptions of various machines which are in production are provided. The foil

Load Capacity Estimation of Foil Air Journal Bearings for Oil-Free Turbomachinery Applications

This paper introduces a simple “Rule of Thumb” (ROT) method to estimate the load capacity of foil air journal bearings, which are self-acting compliant-surface hydrodynamic bearings being considered

Tribological Limitations in Gas Turbine Engines. A Workshop to Identify the Challenges and Set Future Directions

  • D. Grant
  • Engineering, Materials Science
  • 1999
Abstract : Early in the development of the gas turbine aircraft engine, tribology played a key supporting role in extending the life and performance of oil lubricated rolling element bearings

Tribological limitations in gas turbine engines: a workshop to identify the challenges and set future directions, September 15-17, 1999, in Albany, New York

The following report represents a compendium of selected speaker presentation materials and observations made by Prof. O. Pinkus at the NASA/ASME/Industry sponsored workshop entitled "Tribological