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

Berry, Robert Randolph; Palmer, Gene David; Wilson, Ian David

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

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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:

Berry, Robert Randolph ^[1]; Palmer, Gene David ^[2]; Wilson, Ian David ^[2]

Greenville, SC
Clifton Park, NY

Issue Date:: 2000-01-01

Research Org.:: General Electric Co., Schenectady, NY (United States)

OSTI Identifier:: 873429

Patent Number(s):: 6158102

Assignee:: General Electric Co. (Schenectady, NY)

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

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Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T29/4932 - Turbomachine making

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F01D5/066 - {Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T29/53978 - including means to relatively position plural work parts

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
F05D2230/64 - using positioning or alignment devices for aligning or centring, e.g. pins

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T29/49316 - Impeller making
Y10T29/53961 - with work-holder for assembly
Y10T29/49895 - Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]

F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
F05D2230/60 - Assembly methods

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F01D5/06 - Rotors for more than one axial stage, e.g. of drum or multiple disc type

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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.

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                    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.

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                    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.

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@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}

}

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