Patent ID: 6726365
Filing Date: 2004-04-27
Classification: F16C

Abstract:
A foil type fluid bearing including:a stationary retaining member that surrounds an outer periphery of a rotating journal so as to form an annular gap therebetween; and a foil assembly disposed in the gap and supporting the journal, the foil assembly comprising: a top foil having a first end and a second end opposite the first end, wherein the first end faces a slit formed in an axial direction and is fixed to the stationary retaining member, and wherein the top foil is wound in a cylindrical manner from the first end to the second end and supports an outer circumference of the journal via a fluid film layer; a mid foil section having a first end and a second end opposite the first end, wherein the first end faces a slit formed in an axial direction being fixed to the stationary retaining member and the mid foil section is wound in a cylindrical manner from the first end to the second end, and an inner circumference of the mid foil section is in frictional contact with the outer circumference of the top foil in a slidable manner, thereby generating a frictional damping force that counteracts a radially outward movement of the journal; and a corrugated bump foil disposed between the mid foil section and the stationary retaining member, wherein the mid foil section comprises a plurality of at least two mid foils, and wherein the mid foils are superimposed on each other in a slidable manner so as to be in frictional contact with each other.