Shrouded aerofoils

Details Shrouded aerofoils Shrouded aerofoils

1991-12-11

1993-05-18

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416191, 416500, F01D 522

Patent

active

052115402

ABSTRACT:
A shrouded aerofoil assembly such as a turbine rotor for a gas turbine engine has a multiplicity of blades with tip shrouds circumferentially distributed around a rotor disk. Inevitably, in use, the assembly vibrates and must be designed so the potentially most dangerous vibratory modes occur outside the engine speed range. The proposed arrangement has a number of neighbouring blades sharing a common shroud segment. Adjacent shroud segments are interlocked by Z-notch abutments. Blade assemblies have sufficient pre-twist load to maintain frictional contact in the interlocks over the speed range to maintain damping constraints.

REFERENCES:
patent: 4076455 (1978-02-01), Stargardter
patent: 4155152 (1978-09-01), Cretella
patent: 4589175 (1986-05-01), Arrigoni
patent: 4710102 (1987-12-01), Ortolano

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