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:
-
- Ballston Lake, NY
- Clifton Park, NY
- Issue Date:
- Research Org.:
- General Electric Co., Schenectady, NY (United States)
- OSTI Identifier:
- 874655
- Patent Number(s):
- 6435812
- Assignee:
- General Electric Company (Schenectady, NY)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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}
}
Works referenced in this record:
Development Requirements for an Advanced Gas Turbine System
journal, October 1995
- Bannister, R. L.; Cheruvu, N. S.; Little, D. A.
- Journal of Engineering for Gas Turbines and Power, Vol. 117, Issue 4
Advances in Steam Path Technology
journal, April 1996
- Cofer, J. I.
- Journal of Engineering for Gas Turbines and Power, Vol. 118, Issue 2