Turbine assembly and turbine shroud therefor

Details Turbine assembly and turbine shroud therefor Turbine assembly and turbine shroud therefor

2006-12-12

2006-12-12

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Including destructible, fusible, or deformable non-reusable...

C415S173100, C415S173400

Reexamination Certificate

active

07147429

ABSTRACT:
A turbine assembly includes a shroud for being mounted around a last stage of the low pressure turbine rotor. The shroud includes an arcuate body having spaced-apart forward and aft ends and spaced-apart circumferential ends. Attachments are provided for securing the shroud body to the surrounding engine case. An arcuate extension member protrudes rearward from the aft end of the shroud body. The extension member has an inner surface which defines a portion of the gas flowpath through the engine. Seals may be provided to prevent leakage between adjacent shroud segments. The shroud is especially useful for protecting a downstream turbine frame from debris and thermal stress.

REFERENCES:
patent: 4330234 (1982-05-01), Colley
patent: 5593277 (1997-01-01), Proctor et al.
patent: 5971703 (1999-10-01), Bouchard
patent: 6120242 (2000-09-01), Bonnoitt et al.
patent: 6468026 (2002-10-01), Bonnoitt et al.
patent: 6530744 (2003-03-01), Liotta et al.

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