Loading patent…
AssigneeEx-Cell-O Corporation
InventorsJerome R. Bradley, Robert M. Halvorsen, Jeffrey B. Hurst, Gregory F. Long
Estimating the term…
A pressure atomizing fuel nozzle assembly for a gas turbine engine includes a support housing in which a pressure-responsive fuel check valve and metering valve are disposed in line to provide a flow of primary fuel for engine start-up and low power operation and secondary fuel for higher power operation. The check valve is located upstream between the fuel inlet and a sleeve inside of which the metering valve is disposed. The check valve prevents the fuel manifold from draining after engine shut-down and controls fuel entry to both the secondary fuel chamber within the sleeve and to an annular primary fuel chamber between the sleeve and support housing connected in fuel flow relation to the secondary chamber by a fuel filter. The primary fuel flows through the primary chamber around the exterior of the secondary chamber and through an annular primary fuel conduit disposed around the secondary fuel conduit in the housing strut to the nozzle attached to the strut. The secondary fuel flow is controlled by the downstream metering valve in the sleeve and flows interiorly of the primary fuel to the nozzle. In this way, the secondary fuel flow path is subjected to a cooling action by the primary fuel as it flows to the nozzle. The check valve is configured to provide a high closing force and to cause the secondary fuel to exert a washing action on the fuel filter incorporated into the sleeve under high power engine operation conditions.
A fuel nozzle assembly for a gas turbine engine comprising a housing means having fuel inlet means adapted to receive pressurized fuel from a fuel source, means in the housing means providing a secondary fuel chamber and primary fuel chamber downstream from said inlet means for receiving fuel therefrom, a first valve means in the housing means between the fuel inlet means and fuel chamber-providing means operable in response to a given fuel pressure to admit fuel from said inlet means to said secondary fuel chamber and primary fuel chamber, a second valve means in the housing means downstream of said first valve means operable in response to fuel pressure higher than said given fuel pressure to allow fuel flow from the secondary fuel chamber, secondary fuel outlet means in the housing means for receiving fuel from the secondary fuel chamber as allowed by the second valve means, primary fuel outlet means in the housing means for receiving fuel from the primary fuel chamber, and nozzle means on the housing means for receiving primary fuel and secondary fuel from the respective fuel outlet means and introducing same into the engine for combustion.
A fuel nozzle assembly for a gas turbine engine comprising a housing means having fuel inlet means adapted to receive pressurized fuel from a fuel source, means in the housing means providing a secondary fuel chamber and primary fuel chamber downstream from said inlet means for receiving fuel therefrom, a first valve means in the housing means between the fuel inlet means and fuel chamber-providing means operable in response to a given fuel pressure to admit fuel from said inlet means to said secondary fuel chamber and primary fuel chamber, a second valve means in the secondary fuel chamber operable in response to fuel pressure higher than said given fuel pressure to allow fuel flow therefrom, secondary fuel outlet means in the housing means for receiving fuel from the secondary fuel chamber as allowed by the second valve means, primary fuel outlet means in the housing means for receiving fuel from the primary fuel chamber, and nozzle means on the housing means for receiving primary fuel and secondary fuel from the respective fuel outlet means and introducing same into the engine for combustion.
A fuel nozzle assembly for a gas turbine engine, comprising a housing means having fuel inlet means adapted to receive pressurized fuel from a fuel source, an interior chamber in communication with the fuel inlet means, and fuel outlet means in communication with the interior chamber providing a primary fuel outlet means and a secondary fuel outlet means, a pressure-responsive valve means disposed in the interior chamber to provide a flow of primary fuel for engine start-up and low power operation and a flow of secondary fuel for higher power operation, said valve means comprising a means in said interior chamber providing an inner secondary fuel chamber and an outer annular primary fuel chamber therearound for receiving fuel from the fuel inlet means and discharging fuel to the respective fuel outlet means, a check valve means disposed in said interior chamber between said inlet means and said chamber-forming means and operable in response to a given fuel pressure to admit fuel from said inlet means into said secondary fuel chamber and primary fuel chamber and a metering valve means disposed in the secondary fuel chamber operable in response to fuel pressure higher than said given fuel pressure to meter fuel from the secondary fuel chamber to the secondary fuel outlet means, and comprising nozzle means comprising nozzle means on said housing means for receiving the primary fuel flow and secondary fuel flow from the respective fuel outlet means and introducing same into the engine for combustion.
A fuel nozzle assembly for a gas turbine engine wherein the assembly is subjected to elevated temperature, comprising a housing means having fuel inlet means adapted to receive pressurized fuel from a fuel source, an interior chamber in communication with the fuel inlet means, and fuel outlet means in communication with the interior chamber providing a primary fuel outlet means and a secondary fuel outlet means, a pressure-responsive valve means disposed in the interior chamber to provide a flow of primary fuel for engine start-up and low power operation and a flow of secondary fuel for higher power operation, said valve means including a check valve means disposed in the interior chamber downstream from the fuel inlet means and operable in response to a given fuel pressure to allow fuel to flow downstream from said fuel inlet means, a sleeve means disposed in said interior chamber in spaced relation from the housing means to form an outer annular primary fuel chamber therebetween and a secondary fuel chamber in said sleeve means for receiving fuel from said check valve means and discharging fuel to the respective fuel outlet means and a metering valve means disposed in the secondary fuel chamber and operable in response to fuel pressure higher than said given fuel pressure to meter fuel from the secondary fuel chamber to the secondary fuel outlet means, and comprising nozzle means supported on said housing means for receiving the primary fuel flow and secondary fuel flow from the respective fuel outlet means and introducing same into the engine for combustion, said primary fuel flow through the primary fuel chamber around the secondary fuel chamber providing a cooling action to said housing means and secondary fuel.
A fuel nozzle assembly for a gas turbine engine wherein the assembly is subjected to elevated temperature, comprising a housing means having fuel inlet means adapted to receive pressurized fuel from a fuel source, an interior chamber in communication with the fuel inlet means and a fuel outlet means in communication with said interior chamber providing a primary fuel outlet means and secondary fuel outlet means, fuel pressure-responsive valve means disposed in said interior chamber to provide a flow of primary fuel for engine start-up and low power operation and secondary fuel for higher power operation, and comprising a nozzle means on said housing means for receiving the primary fuel flow and secondary fuel flow from the respective fuel outlet means and introducing same in the engine for combustion, said pressure-responsive valve means comprising
A fuel nozzle assembly for a gas turbine engine wherein the assembly is subjected to elevated temperatures, comprising a housing means having fuel inlet means adapted to receive pressurized fuel from a fuel source, an interior chamber in communication with the inlet means, and a fuel outlet means in communication with said interior chamber providing a primary fuel outlet means and secondary fuel outlet means, fuel pressure-responsive valve means disposed in said interior chamber to provide a flow of primary fuel for engine start-up and low power operation and secondary fuel for higher power operation and comprising a nozzle means supported on said housing means for receiving the primary fuel flow and secondary fuel flow from the respective fuel outlet means and injecting same into the engine for combustion, said pressure-responsive valve means comprising
In the operation of a gas turbine engine, a method for supplying fuel to a nozzle means in the engine comprising, flowing fuel to a first valve means located upstream of the nozzle means and operable in response to a given fuel pressure to admit fuel to a secondary fuel chamber and a primary fuel chamber, pressurizing the fuel to said given fuel pressure to flow fuel through the first valve means into the secondary fuel chamber and primary fuel chamber, including conducting the fuel in the primary fuel chamber to the nozzle means and conducting fuel in the secondary fuel chamber to a second valve means upstream of the nozzle means and operable in response to a fuel pressure higher than said given fuel pressure to allow fuel flow to the nozzle means from the secondary fuel chamber, and pressurizing the fuel to said fuel pressure higher than said given fuel pressure as needed to provide secondary fuel to the nozzle means for desired engine operation.
In the operation of a gas turbine engine, a method for supplying primary fuel and secondary fuel to a nozzle means supported on a housing means in the engine comprising, flowing fuel to a check valve means located upstream of the nozzle means and operable in response to a given fuel pressure to admit fuel to an inner secondary fuel chamber and an outer primary fuel chamber, pressurizing the fuel to said given fuel pressure to flow the fuel through the check valve means into the secondary fuel chamber and primary fuel chamber, including conducting the fuel in the primary fuel chamber to the nozzle means through the housing means and conducting the fuel in the secondary fuel chamber to a metering valve means upstream of the nozzle means and operable in response to a fuel pressure higher than said given fuel pressure to meter fuel to the nozzle means through the housing means interiorly of the primary fuel flow to the nozzle means, and pressurizing the fuel to said fuel pressure higher than said given fuel pressure as needed to provide secondary fuel to the nozzle means in addition to primary fuel for desired engine operation.
Dependencies are inferred from the claim text.