Effect of varying Stiffness on the Performance of Air Foil Journal Bearing

Abstract

Air Foil bearings (AFBs) are compliant surfaces, self-acting hydrodynamic bearings typically constructed from several layers of sheet metal foils. These foil rest on elastic support structure and their performance largely depends on this support structure. These type of foil structure consists of bump strips and the smooth foil rest on top foil. AFBs are environmentally friendly used in many commercial applications, both terrestrial, turbomachinery system and in aerospace. The compliant foil structure is modelled using the Catia. The foil deflections calculated from the structural model using finite element analysis is coupled to the hydrodynamic gas film .n the Present work of AFBs stiffness of I the foil is varied at different speed condition of the rotor