Modeling Foil Bearings

Abstract

This paper presents selected numerical models of foil bearings developed in a few research centres around the world. The development of reliable foil bearing numerical models still poses many problems. Such difficulties are encountered mainly due to foil bearings' complex structure. In addition to elements found in conventional journal and sleeve bearings, elastic-plastic elements as a foil complex occur. Foil bearing models have to account for the structural base, the fluid lubricating film as well as the interactions between the two factors. A reliable foil bearing models would significantly contribute to bearing design At present, such bearing modeling process requires timeconsuming and costly experiments.

Methodology of Testing Foil Bearings in the Start-Stop Cycle in the Presence of a Working Medium - Stabilization of Temperature in the Test Chamber

“…The use of foil units in the mentioned bearings causes a higher reserve of stability since the shape of the oil gap in a bearing during its operation regularly adjusts to the present conditions. While lower dumping properties of a smear film are at the same time compensated with a bump foil dumping Miąskowski et al, 2009a;Miąskowski et al, 2009b). Tests of multi iteration cycles that perform sequences of run-up -work -rundown -break maintaining stable border conditions provide an answer to many questions that concern behaviour of working foils at various states of loading or various states of aggregation of the working factors of the performed START-STOP cycles including the suggested cooling system.…”

Methods of Research of Foil Bearings in START-STOP Cycle in the Presence of Working Medium

“…The use of elastic liner foil units causes that rotors of machines placed in those bearings show a higher resource of stability since the shape of the oil gap in a bearing during its operation regularly adjusts to present conditions. On the other hand, worse suppressing properties of the oil film are at the same time compensated with suppression of the bump foil Miąskowski et al, 2009b;Miąskowski et al, 2017).…”