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Title: Bore tube assembly for steam cooling a turbine rotor

Abstract

An axial bore tube assembly for a turbine is provided to supply cooling steam to hot gas components of the turbine wheels and return the spent cooling steam. A pair of inner and outer tubes define a steam supply passage concentric about an inner return passage. The forward ends of the tubes communicate with an end cap assembly having sets of peripheral holes communicating with first and second sets of radial tubes whereby cooling steam from the concentric passage is supplied through the end cap holes to radial tubes for cooling the buckets and return steam from the buckets is provided through the second set of radial tubes through a second set of openings of the end cap into the coaxial return passage. A radial-to-axial flow transitioning device, including anti-swirling vanes is provided in the end cap. A strut ring adjacent the aft end of the bore tube assembly permits axial and radial thermal expansion of the inner tube relative to the outer tube.

Inventors:
 [1];  [2]
  1. (Ballston Lake, NY)
  2. (Clifton Park, NY)
Issue Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874655
Patent Number(s):
6435812
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
bore; tube; assembly; steam; cooling; turbine; rotor; axial; provided; supply; hot; gas; components; wheels; return; spent; pair; inner; outer; tubes; define; passage; concentric; forward; communicate; cap; sets; peripheral; holes; communicating; radial; supplied; buckets; set; openings; coaxial; radial-to-axial; flow; transitioning; device; including; anti-swirling; vanes; strut; adjacent; permits; thermal; expansion; thermal expansion; hot gas; axial flow; axial bore; gas component; /415/416/

Citation Formats

DeStefano, Thomas Daniel, and Wilson, Ian David. Bore tube assembly for steam cooling a turbine rotor. United States: N. p., 2002. Web.
DeStefano, Thomas Daniel, & Wilson, Ian David. Bore tube assembly for steam cooling a turbine rotor. United States.
DeStefano, Thomas Daniel, and Wilson, Ian David. Tue . "Bore tube assembly for steam cooling a turbine rotor". United States. https://www.osti.gov/servlets/purl/874655.
@article{osti_874655,
title = {Bore tube assembly for steam cooling a turbine rotor},
author = {DeStefano, Thomas Daniel and Wilson, Ian David},
abstractNote = {An axial bore tube assembly for a turbine is provided to supply cooling steam to hot gas components of the turbine wheels and return the spent cooling steam. A pair of inner and outer tubes define a steam supply passage concentric about an inner return passage. The forward ends of the tubes communicate with an end cap assembly having sets of peripheral holes communicating with first and second sets of radial tubes whereby cooling steam from the concentric passage is supplied through the end cap holes to radial tubes for cooling the buckets and return steam from the buckets is provided through the second set of radial tubes through a second set of openings of the end cap into the coaxial return passage. A radial-to-axial flow transitioning device, including anti-swirling vanes is provided in the end cap. A strut ring adjacent the aft end of the bore tube assembly permits axial and radial thermal expansion of the inner tube relative to the outer tube.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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