Siemens Westinghouse Power Corporation

Siemens Power Generation, Inc.

David D North

David James Wiebe

William Richard Ryan

Jesse Eng

Arthur J Harris, Jr

Hank Reid

A fastening system has at least one peripheral spring and at least one peripherally expandable bushing, with the peripheral spring being at least partially enclosed within the peripherally expandable bushing. The peripheral spring and peripherally expandable bushing each contain axial openings for receiving an elongated fastening member to secure two dissimilar structures together. The peripheral spring can be a spring bushing. The spring bushing can comprise a series of radially outwardly bowed ribs joined at one end by a fixed hoop. The axial spring can be a spring washer. The peripherally expandable bushing can be a split bushing.

Multidirectionally compliant fastening system

A combustor () for a gas turbine engine is provided with a premix pilot fuel stage () in order to reduce the emission of oxides of nitrogen from the engine. An in-service engine may be modified to add the premix pilot fuel stage by delivering premix pilot fuel to a ring manifold () for tip-feeding a premix pilot fuel outlet member such as a swirler vane () or fuel peg (). In this manner, complex and expensive components such as the top hat (), support housing () and diffusion pilot burner assembly () may be used without modification. Thermal stresses caused by the differential cooling of the ring manifold by the premix pilot fuel () are reduced by a heat shield () installed within the manifold.

Premixed pilot burner for a combustion turbine engine

A flame-holding nozzle for a combustion turbine engine is disclosed. The nozzle includes several elongated sleeves in a substantially concentric arrangement. The sleeves cooperatively provide distinct passageways for fluids to move through the nozzle. The nozzle includes conduits that advantageously direct fluids to designated regions of the nozzle, allowing fuel and cooling fluid to move within the nozzle without becoming commingled. Portions of the nozzle sleeves are also strategically arranged to transmit fluids in a manner that provides substantially-uniform thermal expansion, thereby reducing the need for sliding joints or bellows arrangements.

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Palm Beach Gardens, FL, United States of America

David D North