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US 10,480,568 B2Granted
Foil bearing
AssigneeNtn Corporation
InventorMasato Yoshino
Life of this patent
Estimating the term…
Abstract
Particles (23) are supplied to a bearing gap of a foil bearing. A step (24) is formed in a top foil portion (12a1), to thereby generate an air flow from both end portions (121 and 122) in a direction (N) along a surface of the top foil portion (12a1) and orthogonal to a rotation direction (R) of a shaft (6) toward a region between the both end portions.
Claims16
A foil bearing comprising:
- a plurality of foils, each of the foils including:
- a top foil portion having a bearing surface which forms a bearing gap with a shaft to be supported;
- and
- an under-foil portion arranged on a back side of the top foil portion,
- wherein the foil bearing is configured to support relative rotation of the shaft in a non-contact state with fluid pressure generated in the bearing gap,
- wherein particles are supplied to the bearing gap,
- wherein the top foil portion of each of the foils comprises a fluid control portion which is configured to generate a fluid flow from both end portions of the top foil portion in a direction along a surface of the top foil portion and orthogonal to a direction of the relative rotation toward a region between both the end portions,
- wherein the foils are arranged at a plurality of positions in the relative rotation direction,
- wherein the under-foil portion of each of the foils is configured to elastically support the top foil portion of an adjacent one of the foils from a back side, and
- wherein a cutout portion, which is recessed in the relative rotation direction, is formed at a rear end of each of the under-foil portions.
7 more elements
A foil bearing comprising:
- a top foil portion having a bearing surface which forms a bearing gap with a shaft to be supported;
- and
- a support portion, which is arranged on a back side of the top foil portion, and is configured to elastically support another top foil portion,
- wherein the foil bearing is configured to support relative rotation of the shaft in a non-contact state with fluid pressure generated in the bearing gap,
- wherein particles are supplied to the bearing gap, and
- wherein the top foil portion comprises a surface having a particle collecting portion which forms a recessed sectional shape.
3 more elements
Dependencies are inferred from the claim text.