Attachment of a gas turbine engine blade to a turbine rotor disc

Details Attachment of a gas turbine engine blade to a turbine rotor disc Attachment of a gas turbine engine blade to a turbine rotor disc

1990-11-19

1992-05-05

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

F01D 530

Patent

active

051102625

ABSTRACT:
In a gas turbine firtree root tooth structure in which a firtree root is retained in a shaped slot in a turbine rotor disc by virtue of teeth cooperating with notches in the slot, the bearing surface of a root tooth is barrelled against a planar surface of the respective notch so as to give point contact against that surface, whereby, under load, the barrelled surface crushes so as to override pitch tolerances and even out load distribution. If the barrelling is located at or in the vicinity of the tooth face center, the tendency of the tooth to crack under repeated loadings is minimized.

REFERENCES:
patent: 4169694 (1979-10-01), Sanday
patent: 4191509 (1980-03-01), Leonardi
patent: 4260331 (1981-04-01), Goodwin
patent: 4692976 (1987-09-01), Andrews
patent: 4820126 (1989-04-01), Gavilan
patent: 4824328 (1989-04-01), Pisz et al.

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