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US 9,004,765 B1Granted
Air foil bearing having pressure dam
AssigneeKorea Institute of Science and Technology
InventorsYong Bok Lee, Se Na Jeong, Bokseong Choe
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Abstract
An air foil bearing has a bearing housing having a shaft hole in which a rotary shaft is inserted and a top foil fixed to the shaft hole to support the circumference of the rotary shaft, an air flow path is formed at the top foil by means of a plurality of dams protruding on the inner surface of the top foil, and the air flow path is formed so that air between the top foil and the rotary shaft flows along the circumference of the inner surface of the top foil.
Claims8
An air foil bearing, comprising:
- a bearing housing having a shaft hole in which a rotary shaft is inserted;
- and
- a top foil fixed to the shaft hole to support the circumference of the rotary shaft,
- wherein an air flow path is formed at the top foil by means of a plurality of dams protruding on the inner surface of the top foil,
- wherein the air flow path is formed so that air between the top foil and the rotary shaft flows along the circumference of the inner surface of the top foil,
- wherein when the rotary shaft is rotating, a hydrodynamic pressure concentration region in which a hydrodynamic pressure generated by the air between the top foil and the rotary shaft is concentrated is formed, and
- wherein the plurality of dams includes a closing dam formed in the hydrodynamic pressure concentration region to block the flow of air flowing along the air flow path.
4 more elements
Dependencies are inferred from the claim text.