MODELLING AND ANALYSIS OF ROTATING SYSTEMS WITH GAS FOIL BEARINGS UNDER TRANSIENT OPERATING CONDITIONS

Journal Title: Tribologia - Year 2017, Vol 272, Issue 2

Abstract

Gas foil bearings are on the cutting edge of bearing systems that spread worldwide. Although it is a common practice to apply such systems to high-speed fluid-flow machinery, their modelling and analysis still pose a number of problems. This article describes the methodology used to assess dynamic properties of a rotor-bearings system supported by foil bearings. Particularly close attention has been paid to the system operation in a transitional state during which a gaseous lubricating film is formed. The conception for the description of the rotor support characteristics was implemented in a computer program that is still under development. The approach that has been taken makes it possible to analyse the system properties throughout a whole range of rotational speeds. Another approach used in the past enabled for analyses of the dynamic performance of rotors, but only on the condition that bearing operation is correct (i.e. only fluid friction in bearing is present). The new model allows for much broader analyses of bearings operation, as confirmed by the obtained results. The article discusses exemplary results of analyses and shows a way one can assess the dynamic properties of rotating machinery equipped with foil bearings even when analysed under transient operating conditions.<br/><br/>

Authors and Affiliations

Grzegorz ŻYWICA, Małgorzata BOGULICZ, Paweł BAGIŃSKI

Keywords

Related Articles

ANALIZA WARTOŚCI TEMPERATURY TARCIA W STYKU STAL – MASA GLEBOWA W ZALEŻNOŚCI OD RODZAJU MATERIAŁU KONSTRUKCYJNEGO

W artykule przedstawiono badanie temperatury tarcia w styku masa glebowa-materiał. Do badań wytypowano próbki ze stali 38GSA napawanej elektrodą El-Hard 63 oraz stal Hardox 600. Eksperyment przeprowadzono w warunkach lab...

EXAMINATION OF THE FRACTURE TOUGHNESS AND WEAR RESISTANCE OF MULTILAYER COATINGS

The paper presents the opportunity of improving fracture and wear resistance of ceramic and carbon coatings through the introduction of metallic interlayers that exhibit an elastic-plastic character of deformation. The r...

THE INFLUENCE OF CHO ADDITIVES ON THE SURFACE LAYER

The paper presents results of investigations of CHO additives, dissolved in the synthetic oils (PAO4 and Priolube), on the change of composition of the surface layer of the wear scar after the tribological tests under co...

EFFECTS OF THE APPLICATION OF LOW-FRICTION COATINGS IN THE GEAR OF A CHAIN CONVEYOR

There are many problems in the operation of spiral bevel gears; for example, difficult lubrication conditions lead to excessively high oil temperature and the risk of severe wear. Thus, the aim of this work was to check...

THE INFLUENCE OF THICKNESS OF TiN AND CrN COATINGS ON ROLLING CONTACT FATIGUE

In this paper, the results of the influence the thickness of TiN and CrN coatings on rolling contact fatigue have been presented. The 100Cr6 bearing steel and TiN and CrN coatings deposited on 100Cr6 substrate with diffe...

Download PDF file
  • EP ID EP240862
  • DOI 10.5604/01.3001.0010.6345
  • Views 78
  • Downloads 0

How To Cite

Grzegorz ŻYWICA, Małgorzata BOGULICZ, Paweł BAGIŃSKI (2017). MODELLING AND ANALYSIS OF ROTATING SYSTEMS WITH GAS FOIL BEARINGS UNDER TRANSIENT OPERATING CONDITIONS. Tribologia, 272(2), 167-173. https://europub.co.uk./articles/-A-240862