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Title: Apparatus and methods for aligning holes through wheels and spacers and stacking the wheels and spacers to form a turbine rotor

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.

Inventors:
 [1];  [2];  [2]
  1. Greenville, SC
  2. Clifton Park, NY
Issue Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
873429
Patent Number(s):
6158102
Assignee:
General Electric Co. (Schenectady, NY)
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; methods; aligning; holes; wheels; spacers; stacking; form; turbine; rotor; gas; fixture; upstanding; bolts; reception; aligned; bolt; superposed; disk; alignment; rods; received; openings; assembly; axially; registering; enable; insertion; thin-walled; tubes; circumferentially; rim; tight; tolerances; provide; supply; return; steam; cooling; buckets; radial; dimensions; substantially; circumferential; direction; allow; misalignment; due; thermal; expansion; tolerance; stack-up; wheel-to-spacer; mismatch; rabbet; mechanical; growth; dimension; affords; tightly; toleranced; installed; turbine rotor; thermal expansion; gas turbine; cooling tubes; cooling tube; bolt holes; circumferential direction; radial dimension; aligned bolt; /29/

Citation Formats

Berry, Robert Randolph, Palmer, Gene David, and Wilson, Ian David. Apparatus and methods for aligning holes through wheels and spacers and stacking the wheels and spacers to form a turbine rotor. United States: N. p., 2000. Web.
Berry, Robert Randolph, Palmer, Gene David, & Wilson, Ian David. Apparatus and methods for aligning holes through wheels and spacers and stacking the wheels and spacers to form a turbine rotor. United States.
Berry, Robert Randolph, Palmer, Gene David, and Wilson, Ian David. Sat . "Apparatus and methods for aligning holes through wheels and spacers and stacking the wheels and spacers to form a turbine rotor". United States. https://www.osti.gov/servlets/purl/873429.
@article{osti_873429,
title = {Apparatus and methods for aligning holes through wheels and spacers and stacking the wheels and spacers to form a turbine rotor},
author = {Berry, Robert Randolph and Palmer, Gene David and Wilson, Ian David},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

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