Rotor blade system for a gas turbine engine

Details Rotor blade system for a gas turbine engine Rotor blade system for a gas turbine engine

1976-06-28

1978-02-28

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Axially extending shroud ring or casing

416196R, 416217, 416500, F01D 522

Patent

active

040764559

ABSTRACT:
A rotor blade system which is adapted for long term reliable operation in a gas turbine engine is disclosed. Techniques for altering the natural frequency of the blade system to reduce the detrimental combined effects of external excitation and self-excitation are developed. One structure shown utilizes a shroud for the control of self-excitation in combination with a pin root to lower the fundamental first natural bending frequency of the blade system below the level of the 2E frequency at idle.

REFERENCES:
patent: 2317338 (1943-04-01), Rydmark
patent: 2510734 (1950-06-01), Bodger
patent: 2660400 (1953-11-01), Griffith
patent: 2944787 (1960-07-01), Gingras
patent: 2955799 (1960-10-01), Oickle et al.
patent: 3307775 (1967-03-01), Petrie
patent: 3612718 (1971-10-01), Palfreyman et al.
patent: 3768933 (1973-10-01), Bouiller et al.
patent: 3918840 (1975-11-01), Haworth et al.

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