Apparatus and methods for aligning holes through wheels and spac

Details Apparatus and methods for aligning holes through wheels and spac Apparatus and methods for aligning holes through wheels and spac

1999-03-24

2000-12-12

Scherbel, David A.

Metal working

Means to assemble or disassemble

Including means to relatively position plural work parts

292811, B25B 2714

Patent

active

06158102&

ABSTRACT:
A gas turbine rotor stacking fixture includes upstanding bolts for reception in aligned bolt holes in superposed aft disk, wheels and spacers and upstanding alignment rods received in openings of the disk, wheels and spacers during the rotor stacking assembly. The axially registering openings enable insertion of thin-walled tubes circumferentially about the rim of the rotor, with tight tolerances to the openings to provide supply and return steam for cooling buckets. The alignment rods have radial dimensions substantially less than their dimensions in a circumferential direction to allow for radial opening misalignment due to thermal expansion, tolerance stack-up and wheel-to-spacer mismatch due to rabbet mechanical growth. The circumferential dimension of the alignment rods affords tightly toleranced alignment of the openings through which the cooling tubes are installed.

REFERENCES:
patent: 5504987 (1996-04-01), Bergkvist
patent: 5745968 (1998-05-01), Genest et al.
patent: 5830312 (1998-11-01), Weimer et al.

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