Process for repairing labyrinth seal flanges

Details Process for repairing labyrinth seal flanges Process for repairing labyrinth seal flanges

1985-04-02

1986-08-19

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291564R, 292835, 2940202, 2940205, 2940206, 2940219, 29557, 29DIG19, 72 98, 72102, 415170R, 416174, B23P 1500, B23P 600, B21D 314

Patent

active

046061029

ABSTRACT:
The invention relates to a process and an apparatus for repairing worn labyrinth seal flanges. The seal flanges are repaired by spin-forming them to increase their radial height to at least equal that of an unworn labyrinth seal. A tool for carrying out the process has a pair of parallel rollers displaced a constant distance which is advanced radially inwardly over the seal flange so as to deform the sides and cause the material to creep in a radially outward direction to increase the height of the flange. The flange may be ground to remove any residual defects caused by the spin-forming operation.

REFERENCES:
patent: 3846899 (1974-11-01), Gross
patent: 4028788 (1977-05-01), DeMusis
patent: 4285108 (1981-08-01), Arrigoni

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