Method of manufacturing a root pivot assembly of a variable inci

Details Method of manufacturing a root pivot assembly of a variable inci Method of manufacturing a root pivot assembly of a variable inci

1986-05-29

1987-11-17

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29428, 29445, 29525, 29DIG26, 415160, 415161, B21K 304, B23P 1502

Patent

active

047063548

ABSTRACT:
A method of manufacturing a variable incidence stator blade assembly comprising forming a blade with a root which forms an extension of the aerodynamic profile of the blade, forming a bush with a recess accommodating the root by ultrasonic, electro-chemical or electro-erosion machining and assembling the blade and bush in a turbo-machine outer casing and in an inner ring of channel section.
A variable incidence stator blade assembled in a compressor of a gas turbine is also described, the blade assembly being as manufactured by the method. The channel section inner ring carried an abradable layer which co-operates to form a seal with annular lips carried by the compressor rotor drum.

REFERENCES:
patent: 2197335 (1940-04-01), Bohen
patent: 3030072 (1962-04-01), Boyd
patent: 3542484 (1970-11-01), Mason
patent: 3717567 (1973-02-01), Bodine
patent: 3990810 (1976-11-01), Amos et al.
patent: 4604030 (1986-08-01), Naudet
Mecanique Electricite, No. 217, Jan. 1968, "Application de L'Usinage Electrochimique (E.C.M.) Aux Aubes de Turbine", by M. O. Traynard, Chef de production S.N.E.C.M.A.

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