General Electric Company

Michael Joseph Gambone

Christopher Charles Glynn

Jan Christopher Schilling

Randy M Vondrell

Daniel Edward Mollmann

Kenneth Lee Fisher

Barry Lynn Allmon

Bala Corattiyil

Christophe Jude Day

Mark Joseph Gleason

Morris Green Penn

Clifford Edward Allen, Jr

Mark Douglas Ehresman

Clifford Edward Allen

Randy Marinus Vondrell

A method for making a test specimen includes machining out a chordal core from an annular forging and machining the specimen symmetrical about a chordal axis of the core. A linear cutting tool such as a wire EDM machine is used for the machining which includes at least a partially cylindrical cutting about the chordal axis with the linear cutting tool. A copper or brass tubular EDM electrode may be used. The chordal core may be machined from fat of the forging. The test specimen may have with a gauge section diameter in a range of 0.1-0.5 inches. The EDM process may include directing jets of machining fluid or dielectric in up and down along a cutting portion of an EDM wire of the EDM machine or performing the EDM process in a tank of machining fluid or dielectric with the annular forging submerged in the fluid or dielectric.

Extraction of chordal test specimens from forgings

A rotor assembly for a gas turbine engine includes a bearing assembly that reduces dynamic loads to a support frame and static bending to the rotor assembly during periods of rotor unbalance. The rotor assembly includes a rotor shaft coupled to a fan and supported longitudinally with a plurality of bearing assemblies on a support frame. A number two bearing assembly includes a paired race, a rolling element, and a mounting race. The mounting race includes a spherical face and is secured to the bearing assembly with a retainer that plastically fails at a pre-determined moment load.

Method and apparatus for supporting rotor assemblies during unbalances

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Mason, OH, United States of America

Michael Joseph Gambone