Zero Air Gap Condition in Aerostatic Flat Bearings

  • Federico Colombo
  • Luigi LentiniEmail author
  • Terenziano Raparelli
  • Vladimir Viktorov
  • Andrea Trivella
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)


In the last fifty years, the performance of aerostatic pads has been largely investigated as regards load capacity, consumption, stiffness and damping. However, there are few works studying the effect of other aspects which are not usually taken into account, e.g., deformations, waviness and roughness. This paper investigates the causes of air leakages at zero air gap condition. Different numerical simulations are performed to evaluate which is the deformed shape of the pad under different loading conditions. Experimental air flow measurements at zero air gap condition were also performed. It has been found that, in this instance, pad deflection is one of the main causes producing air leakages.


air bearing gas bearing aerostatic pads lubrication 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Lentini, L., Moradi, M., Colombo, F.: A Historical Review of Gas Lubrication: From Reynolds to Active Compensations. Tribology in Industry. 40, 165–182 (2018).
  2. 2.
    Boffey, D.A., Wilson, P.M.: An experimental investigation of the pressures at the Edge of a gas bearing pocket. Journal of Lubrication Technology. 103, 593–600 (1981)Google Scholar
  3. 3.
    Boffey, D.A., Duncan, A.E., Dearden, J.K.: An experimental investigation of the effect of orifice restrictor size on the stiffness of an industrial air lubricated thrust bearing. Tribology International. 14, 287–291 (1981)Google Scholar
  4. 4.
    Chen, X.-D., He, X.-M.: The effect of the recess shape on performance analysis of the gas-lubricated bearing in optical lithography. Tribology international. 39, 1336–1341 (2006)Google Scholar
  5. 5.
    Colombo, F., Lentini, L., Raparelli, T., Trivella, A., Viktorov, V.: Dynamic Characterisation of Rectangular Aerostatic Pads with Multiple Inherent Orifices. Tribology Letters. 66, (2018).
  6. 6.
    Fourka, M., Bonis, M.: Comparison between externally pressurized gas thrust bearings with different orifice and porous feeding systems. Wear. 210, 311–317 (1997). doi:
  7. 7.
    Yoshimoto, S., Kohno, K.: Static and Dynamic Characteristics of Aerostatic Circular Porous Thrust Bearings (Effect of the Shape of the Air Supply Area). Journal of Tribology. 123, 501 (2001).
  8. 8.
    KWAN, Y.B.P., CORBETT, J.: Porous aerostatic bearings: an updated review. Wear. 222, 69–73 (1998)Google Scholar
  9. 9.
    Colombo, F., Lentini, L., Raparelli, T., Trivella, A., Viktorov, V.: A Lumped Model for Grooved Aerostatic Pad. In: Advances in Service and Industrial Robotics. pp. 678–686. Springer International Publishing (2018)Google Scholar
  10. 10.
    Colombo, F., Lentini, L., Raparelli, T., Trivella, A., Viktorov, V.: Dynamic model of a grooved thrust bearing: Numerical model and experimental validation. Presented at the AIMETA 2017 - Proceedings of the 23rd Conference of the Italian Association of Theoretical and Applied Mechanics (2017)Google Scholar
  11. 11.
    Colombo, F., Lentini, L., Raparelli, T., Viktorov, V.: Experimental Identification of an Aerostatic Thrust Bearing. In: Advances in Italian Mechanism Science. pp. 441–448. Springer (2017)Google Scholar
  12. 12.
    Colombo, F., Lentini, L., Raparelli, T., Viktorov, V.: Actively compensated aerostatic thrust bearing: design, modelling and experimental validation. Meccanica. 1–16 (2017).
  13. 13.
    Colombo, F., Lentini, L., Raparelli, T., Trivella, A., Vladimir, V.: A nonlinear lumped parameter model of an externally pressurized rectangular grooved air pad bearing. In: Advances in Italian Mechanism Science. pp. 490–497. Springer (2018)Google Scholar
  14. 14.
    Charki, A., Diop, K., Champmartin, S., Ambari, A.: Numerical simulation and experimental study of thrust air bearings with multiple orifices. International Journal of Mechanical Sciences. 72, 28–38 (2013).
  15. 15.
    Belforte, G., Colombo, F., Raparelli, T., Trivella, A., Viktorov, V.: Experimental Analysis of Air Pads with Micro Holes. Tribology Transactions. 56, 169–177 (2013).
  16. 16.
    Miyatake, M., Yoshimoto, S.: Numerical investigation of static and dynamic characteristics of aerostatic thrust bearings with small feed holes. Tribology International. 43, 1353–1359 (2010).
  17. 17.
    Lu, L., Chen, W., Yu, N., Wang, Z., Chen, G.: Aerostatic thrust bearing performances analysis considering the fluid-structure coupling effect. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 230, 1588–1596 (2016).

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Federico Colombo
    • 1
  • Luigi Lentini
    • 1
    Email author
  • Terenziano Raparelli
    • 1
  • Vladimir Viktorov
    • 1
  • Andrea Trivella
    • 1
  1. 1.Politecnico di TorinoTurin (TO)Italy

Personalised recommendations