Rotor assembly

Details Rotor assembly Rotor assembly

1999-06-17

2000-12-05

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416193A, 416201R, 416248, F01D 530

Patent

active

061557889

ABSTRACT:
A fan rotor assembly (30) for a gas turbine engine (10) comprises a fan rotor (32) and a plurality of radially extending fan blades (34). Each fan blade (34) has a root (64) which is retained in a corresponding groove (54) in the periphery of the hub (54) of the fan rotor (32). Each fan blade root (64) comprises four axially spaced root portions (66, 68, 70 and 72) which locate in a corresponding number of axially spaced groove portions (56, 58, 60 and 62). The flanks (94, 98) of two of the root portions (66, 70) are arranged at an angle to the axis of the fan rotor (32) and the flanks (96, 100) of the other two root portions (68, 72) are arranged at an angle in the opposite sense. The flanks (74, 76, 78 and 80) of the groove portions (56, 58, 60 and 62) are arranged at the same angle as the flanks (94, 96, 98 and 100) of the corresponding root portions (66, 68, 70 and 72). The arrangement provides improved retention of the fan blades (34) and reduces the weight of the fan blades (34) and fan rotor (32).

REFERENCES:
patent: 2639119 (1953-05-01), Greenwald
patent: 2751189 (1956-06-01), Ledwith
patent: 3378230 (1968-04-01), Toomey
patent: 5340280 (1994-08-01), Schilling
patent: 5913660 (1999-06-01), Knott
patent: 5919032 (1999-07-01), Naudet et al.

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