Parker-hannifin Corporation

Fady Bishara

Jeffrey R Lehtinen

Curtis F Harding

Jie Qian

Bryan T Runkle

Stephen C Paskevich

A nozzle tip assembly and method characterized by the use of a retention device including at least one tab that cooperates with a ledge for coupling a nozzle shroud to a nozzle adaptor. The retention device can be used as a secondary retention feature to prevent nozzle separation and/or to enable the fuel injector to be repaired without having to replace the entire assembly. The latter advantage is of particular benefit when there is damage during assembly or when the nozzle tip assembly is being overhauled.

Nozzle tip assembly with secondary retention device

Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.

Gas turbine fuel injector assembly with overlapping frictionally engaged members for damping vibrations

Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction as a function of frequency. Accordingly, low frequency vibration can be undamped, while vibration above a prescribed frequency can be damped. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.

Vibration damper

Vibration damper for fuel injector

A method for increasing and/or suppressing a natural frequency of a fuel injector feed strip while increasing in the axial direction the flexibility of the feed strip, without the use of additional structure or damping devices. More particularly, and by way of example, the present invention provides a fuel feed strip that is shaped in a shape corresponding to a first vibration mode (e.g., a bow shape) of a fuel feed strip of a desired shape (e.g., a straight fuel feed strip). By forming the fuel feed strip in a shape corresponding to a first vibration mode of the fuel feed strip of a desired shape, a vibration mode of the fuel feed strip is suppressed while the axial flexibility of the fuel feed strip is increased.

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Cincinnati, OH, United States of America

Fady Bishara