Turbine blade with spar and shell

Details Turbine blade with spar and shell Turbine blade with spar and shell

2011-01-11

2011-01-11

Look, Edward (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Having spanwise compression means

C416S19300A, C416S226000, C416S233000

Reexamination Certificate

active

07866950

ABSTRACT:
A turbine blade for use in a gas turbine engine, where the turbine blade is made from a spar and shell construction in which a thin walled shell is held in place between the blade tip and the platform by only a mechanical fastener without using any bonding, welding or brazing. The spar is connected to an attachment by a tie bolt, and a separate platform is secured, over the attachment t in which the shell is held against. This provides for a thermally free platform and shell connection. With this arrangement, the shell is held under compression within the 2% yield stress range such that the turbine blade shell can have an infinite life. Also, the turbine blade is much lighter than prior art blades. As a result, the spar and shell blade produces less stress on the rotor disk during engine operation.

REFERENCES:
patent: 3073569 (1963-01-01), Wagner
patent: 4473336 (1984-09-01), Coney et al.
patent: 4650399 (1987-03-01), Craig et al.
patent: 4859149 (1989-08-01), McClain
patent: 5277548 (1994-01-01), Klein et al.
patent: 6234753 (2001-05-01), Lee
patent: 7080971 (2006-07-01), Wilson et al.
patent: 7736131 (2010-06-01), Wilson, Jr.

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