Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Hollow
Reexamination Certificate
2009-05-05
2011-12-20
Lebentritt, Michael (Department: 2829)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Hollow
C416S09600A, C416S09700R, C416S23100A, C415S115000
Reexamination Certificate
active
08079821
ABSTRACT:
A turbine airfoil usable in a turbine engine with a cooling system and a compliant dual wall configuration configured to enable thermal expansion between inner and outer layers while eliminating stress formation is disclosed. The compliant dual wall configuration may be formed a dual wall formed from inner and outer layers separated by a compliant structure. The compliant structure may be configured such that the outer layer may thermally expand without limitation by the inner layer. The compliant structure may be formed from a plurality of pedestals positioned generally parallel with each other. The pedestals may include a first foot attached to a first end of the pedestal and extending in a first direction aligned with the outer layer, and may include a second foot attached to a second end of the pedestal and extending in a second direction aligned with the inner layer.
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Campbell Christian X.
Morrison Jay A.
Lebentritt Michael
Siemens Energy Inc.
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