Platform mounted components

Details Platform mounted components Platform mounted components

2007-04-03

2007-04-03

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Integrally shaped or blended into hub

C415S200000, C029S889230, C029S889710

Reexamination Certificate

active

11282602

ABSTRACT:
A platform arrangement for components such as aerofoil vanes1, 21is provided whereby the necessary rigidity provided by the platform does not create excess problems with respect to stress and strain fatigue failure at thinner sections of the component. The leading edge6, 26and trailing edge7, 27of a vane generally have a thinner section and so when subject to greater flex deformation such flex deformation may lead to premature failure through stress and strain. Structural configurations are now provided which comprise cut out windows24in the platform22beneath the edges26, 27or alternatively differential material types at these locations with a less stiff nature. Generally, a backing member25is provided below an integral platform layer22to create generally greater stiffness in the platform unit formed by the combination but in accordance with the present invention this backing member25may include the cut out windows24or have the necessary differential material types for variable flexibility compliance at portions of reduced component cross-section.

REFERENCES:
patent: 3266771 (1966-08-01), Morley
patent: 3731360 (1973-05-01), Stone, Jr.
patent: 4850090 (1989-07-01), Catlow
patent: 6419447 (2002-07-01), Watanabe
patent: 6431835 (2002-08-01), Kolodziej
patent: 6805534 (2004-10-01), Brittingham
patent: 2004/0126239 (2004-07-01), Gautreau
patent: 1 426 553 (2004-06-01), None
patent: 1 141 270 SP (1969-01-01), None
patent: 2 401 657 (2004-11-01), None

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