Abstract: A technique for refurbishing nozzle diaphragm sections of a gas turbine replaces an eroded section of the nozzle diaphragm with a replacement part designed to engage a slot machined in the nozzle diaphragm. The replacement part is formed of a material with capable of sustained exposure to higher temperature than the original eroded section, and with a similar coefficient of expansion as the material used for manufacture the original nozzle diaphragm. The combination of the nozzle diaphragm and the replacement part conform to the original manufacturer's dimensional specifications for the nozzle diaphragm.
Type:
Application
Filed:
December 8, 2010
Publication date:
March 24, 2011
Applicants:
LEADING EDGE TURBINE TECHNOLOGIES, LTD., CALPINE OPERATING SERVICES, INC.
Abstract: A technique for refurbishing nozzle diaphragm sections of a gas turbine replaces an eroded section of the nozzle diaphragm with a replacement part designed to engage a slot machined in the nozzle diaphragm. The replacement part is formed of a material with capable of sustained exposure to higher temperature than the original eroded section, and with a similar coefficient of expansion as the material used for manufacture the original nozzle diaphragm. The combination of the nozzle diaphragm and the replacement part conform to the original manufacturer's dimensional specifications for the nozzle diaphragm.
Type:
Application
Filed:
May 12, 2009
Publication date:
November 18, 2010
Applicants:
LEADING EDGE TURBINE TECHNOLOGIES, LTD., CALPINE OPERATING SERVICES, INC.
Abstract: A gas turbine nozzle can be refurbished to reduce downstream deflection. The outer shroud of the gas turbine nozzle is held in a fixture, and then the nozzle is heated. The heated nozzle is then reshaped by a force exerted upon the inner shroud of the gas turbine, reducing the downstream deflection of the nozzle. After the deformation of the nozzle, an aft hook of the nozzle that has been adjusted by previous refurbishment efforts can be rebuilt to remove the previous adjustments.
Type:
Application
Filed:
August 15, 2008
Publication date:
February 18, 2010
Applicant:
Leading Edge Turbine Technologies, Ltd.