Seal assembly for an intershaft seal in a gas turbine engine
AssigneeUnited Technologies Corporation
InventorsWilliam G. Sheridan, Harold K. Shaffer
Life of this patent
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Abstract
A seal assembly for use in an intershaft seal includes a first seal that seals to a seal plate on an inner rotor shaft, a second seal that seals to a seal plate on an outer rotor shaft, and an intermediate seal that is supported by a stator assembly and seals to the first seal and the second seal. The intermediate seal may include a seal segment affixed to the stator assembly, a ring seal between the seal segment and the first seal, and a ring seal between the seal segment and the second seal. An intershaft seal with this seal assembly has less flex than a prior art intershaft seal and thereby results in greater durability and less seal wear.
Claims20
A seal assembly for use in a gas turbine engine having a stator assembly that provides support for an inner rotor shaft and an outer rotor shaft, the inner rotor shaft being coaxial with and spaced radially inward of the outer rotor shaft, the inner rotor shaft and the outer rotor shaft being rotatable relative to the stator assembly, the seal assembly comprising:
- a first seal that extends circumferentially about the inner rotor shaft and seals said stator to the inner rotor shaft;
- a second seal that extends circumferentially about the outer rotor shaft and seals said stator to the outer rotor shaft;
- and
- an intermediate seal comprising a seal segment that extends circumferentially about the inner rotor shaft and is supported by the stator assembly, and seals the space between said shafts by sealing to the first seal and the second seal independently of one another.
Dependencies are inferred from the claim text.