Damped airfoil blade

Details Damped airfoil blade Damped airfoil blade

1991-05-20

1992-11-24

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Having wear liner, sheathing or insert

416500, F01D 516

Patent

active

051658607

ABSTRACT:
The internal blade damper is an elongated member with a damping surface of discrete width in contact with the interior blade surfaces. Contact is continuous throughout a substantial length. The damper extends between 2.degree. and 30.degree. from the radial direction, producing a direction of contact having some radial component. Centrifugal force loads the damping surface.

REFERENCES:
patent: 2689107 (1954-09-01), Odegaard
patent: 2809802 (1957-10-01), Suits
patent: 2920868 (1960-01-01), Ackerman et al.
patent: 2984453 (1961-05-01), Heymann
patent: 3027138 (1962-03-01), Howell et al.
patent: 5056738 (1991-10-01), Mercer et al.
Journal of Engineering for Power Publication entitled "Friction Damping of Resonant Stresses in Gas Turbine Engine Airfoils".

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