Foil air bearing having herringbone pattern

Abstract

Provided is a foil air bearing having a herringbone pattern to sustain a load of a rotor rotating in a predetermined rotation direction around a center line, the foil air bearing including an upper top foil disposed to face a surface of the rotor, a middle top foil disposed under the upper top foil, a lower top foil disposed under the middle top foil, a bump foil provided as an elastically deformable member and disposed under the lower top foil, and a plurality of slots provided as holes penetrating from an upper surface to a lower surface of the middle top foil, and extending along a lengthwise direction forming a predetermined angle with a rotation direction of the rotor, wherein the upper top foil is deformed in a downward concave shape at locations corresponding to the slots due to air pressure generated by rotation of the rotor.

Dependencies are inferred from the claim text.