Seal for turbine engine

Details Seal for turbine engine Seal for turbine engine

2006-07-06

2009-08-11

Nguyen, Ninh H (Department: 3745)

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Resilient, flexible, or resiliently biased

C415S174500, C415S135000, C277S413000, C277S931000

Reexamination Certificate

active

07572099

ABSTRACT:
A turbine engine includes a first turbine structure that supports a seal. The seal is movable within a recess of the first turbine structure. The seal is arranged in close proximity to a seal land of a second turbine structure for preventing a fluid from leaking past the seal and seal land. A thermal expansion member interconnects the first turbine structure and the seal. The thermal expansion member expands in response to an increase in temperature to move the seal toward the seal land preventing the typical enlarged gap between the seal and seal land resulting from thermal growth. In one example, the thermal expansion member, which is arranged at each opposing end of a seal segment, is a bimetallic coil spring supported on the first turbine structure by a cage. A free end of the coil spring is secured to the seal at the opposing end portions.

REFERENCES:
patent: 6435514 (2002-08-01), Aksit et al.
patent: 6840519 (2005-01-01), Dinc et al.
patent: 6969231 (2005-11-01), Ghasripoor et al.
patent: 7140382 (2006-11-01), Kempf et al.

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