Abstract: A dual fuel nozzle for a combustion turbine having a swirl cap that is adapted to securely mount with an atomizing cylinder proximate its discharge end. A nozzle tip that is adapted to removably mount with a liquid fuel pipe is provided. The atomizing cylinder comprises an outer wall having an inlet end and opposing discharge end, and flange portion formed proximate the inlet end. The flange portion is adapted to be securely coupled with the liquid fuel pipe to the combustion turbine. The outer wall and flange portion define a receptacle that extends from the inlet end and substantially downstream to the discharge end. The receptacle is adapted to removably receive the liquid fuel pipe and the nozzle tip. The liquid fuel pipe has an inlet end and discharge end with the discharge end adapted to removably receive the nozzle tip. The liquid fuel pipe defines a liquid fuel flow passage that extends from the inlet end and substantially downstream of the flange portion proximate the discharge end.

Abstract: A generator rotor that reduces friction force transmitted to rotor teeth by a retaining ring is disclosed. The friction force is caused by end windings pushing longitudinally outward against the retaining ring when the windings heat up during operation of the rotor. A ring key diminishes the friction force transmitted to a rotor teeth region by transmitting more of the friction force to a rotor pole region. The present invention accomplishes this reduction in transmission by either forming a gap between the ring key and the teeth regions, by producing only light contact between the ring key and the teeth regions, by the ring key being formed of a lower stiffness material in the areas in which it contacts the teeth regions, or by a combination of the above.

Abstract: An oxide ceramic composite suitable for fabricating components of combustion turbines and similar high temperature environments. The composite is fabricated by dispersing metal particles in a fiber preform and infiltrating the fiber preform with sol-gel matrix precursor material. Alternatively, the metal particles are mixed into the sol-gel matrix precursor material and the preform is infiltrated with the mixture. Later in the fabrication process, the metal particles oxidize and become oxidized metal when the sol-gel matrix precursor material is sintered. The oxidized metal has more volume and mass than the metal particles. As a result, the oxidized metal contributes to increasing the density of the composite so that it is suitable for use in combustion turbines and similar high temperature environments.

Abstract: The combustion turbine system comprises a fuel line connected to the combustor with a portion of the fuel line being disposed in heat transfer relationship with the exhaust gas from the combustion turbine so that the fuel may be heated by the exhaust gas prior to being introduced into the combustor. The system may also comprise a fuel by-pass control system for mixing unheated fuel with the heated fuel to control the temperature of the fuel being introduced into the combustor.

Abstract: A method and a system for creating an improved cutting tool having a helical shaped cutting surface includes a computer, a computer numerically controlled milling machine and an electric discharge machine. The computer can be programmed to form the female shape of a helical spline of a cutting tool that extends longitudinally from the back of the tool to the front of the tool so that it is not parallel to a plane perpendicular to a longitudinal axis of the tool. Disposed along the spline may be a plurality of cutting teeth that each extend outward from the curved spline and have a cutting face that is curved in both a radial direction and in an axial direction with respect to the cutting tool. After forming the female shape of this spline, the computer can develop a cutting path for a tool of a numerically controlled milling machine and operate the milling machine to create an electrode having the female shape of the spline of the cutting tool.