Segmented air floating seal
First Claim
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1. A seal assembly to provide a seal against a rotary shaft, comprising:
- a support ring;
a plurality of bias members each connected to the support ring;
a plurality of support plates, each support plates being connected to a respective bias member;
a plurality of seal segments, each seal segment being connected to a respective support plate, each seal segment having a curved seal face of substantially the same radius as the rotary shaft; and
, the seal segments being made of a fiber reinforced ceramic matrix composite material.
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Abstract
A segmented floating seal assembly used in a gas turbine engine to seal a rotary shaft. The segmented seal is made from a fiber reinforced ceramic matrix composite (FRCMC) material having a polymer-derived pre-ceramic resin in its ceramic state, fibers of Nextel, and a filler material. The seal segments are secured to respective support plates, and the support plates are each biased by a spring member secured to a support ring mounted in the engine. The material in the seal segments are resistive to very high temperatures, are not brittle, allow little flow across the seal face, and durable.
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Citations
20 Claims
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1. A seal assembly to provide a seal against a rotary shaft, comprising:
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a support ring;
a plurality of bias members each connected to the support ring;
a plurality of support plates, each support plates being connected to a respective bias member;
a plurality of seal segments, each seal segment being connected to a respective support plate, each seal segment having a curved seal face of substantially the same radius as the rotary shaft; and
,the seal segments being made of a fiber reinforced ceramic matrix composite material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. a process for sealing a rotary shaft in a gas turbine engine, comprising the steps of:
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providing for a plurality of seal segments around the rotary shaft;
providing for a support plate to support each of the seal segments;
providing for a bias means connected to each of the support plates; and
,providing for the seal segments to be made from a fiber reinforced ceramic matrix composite material. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification