Journal bearing hybrid dampening for increased temperature range
AssigneeHamilton Sundstrand Corporation
InventorsCraig M. Beers, Brent J. Merritt, Paul M. Colson
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Abstract
A bearing system for a rotatable shaft includes a bearing shaft coaxial with the rotatable shaft, a bearing coaxial with the bearing shaft, a bearing housing surrounding the bearing and having a plurality of retention channels disposed axially along the bearing housing, and a dampening assembly comprising a plurality of circumferential seal elements disposed within each of the plurality of retention channels. A first subset of the plurality of seal elements is formed from a first material and a second subset of the plurality of seal elements is formed from a second material.
Claims15
A bearing system for a rotatable shaft, the bearing system comprising:
- a bearing shaft coaxial with the rotatable shaft;
- a bearing coaxial with the bearing shaft;
- a bearing housing surrounding the bearing and having a plurality of retention channels disposed axially along the bearing housing;
- and
- a dampening assembly comprising a plurality of circumferential seal elements, the plurality of circumferential seal elements comprising separate respective seal elements disposed within each of the plurality of retention channels,
- wherein a first subset of the plurality of seal elements comprises a first pair of seal elements and is formed from silicone and a second subset of the plurality of seal elements comprises a second pair of seal elements and is formed from a fluorocarbon elastomer.
An air cycle machine comprising:
- a tie shaft rotatable about an axis;
- and
- a bearing system supporting the tie shaft, the bearing system comprising:
- a bearing shaft coaxial with the tie shaft;
- a bearing coaxial with the bearing shaft;
- a bearing housing surrounding the bearing and having a plurality of retention channels disposed axially along the bearing housing;
- and
- a dampening assembly comprising a plurality of circumferential seal elements, the plurality of circumferential seal elements comprising separate respective seal elements disposed within each of the plurality of retention channels,
- wherein a first subset of the plurality of seal elements comprises a first pair of seal elements and is formed from silicone and a second subset of the plurality of seal elements comprises a second pair of seal elements and is formed from a fluorocarbon elastomer.
Dependencies are inferred from the claim text.