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US 8,572,974 B2Granted
Variable speed and displacement electric fluid delivery system for a gas turbine engine
AssigneeHamilton Sundstrand Corporation
InventorLeo J. Veilleux, Jr.
Life of this patent
Estimating the term…
Abstract
A fluid delivery system in a gas turbine engine includes an electric motor, a first fluid pump system and a second fluid pump system. The electric motor operates at a variable speed. The first pump system includes a first pump driven by the motor to deliver a first fluid to the gas turbine engine. The second pump system includes a second pump driven by the motor to deliver a second fluid to the gas turbine engine, the second pump having a variable displacement.
Claims17
A fluid delivery system for a gas turbine engine, the fluid delivery system comprising:
- an electric motor having a variable speed;
- a first pump system having:
- a first pump driven by the motor to deliver a first fluid to the gas turbine engine, wherein the first pump comprises a fixed displacement lubrication pump driven at the variable speed to provide a lubricant from a lubricant tank to the gas turbine engine;
- and
- a fixed displacement scavenge pump driven at the variable speed, wherein the scavenge pump returns the lubricant from the gas turbine engine to the lubricant tank;
- and
- a second pump system having:
- a second pump driven by the motor to deliver a second fluid to the gas turbine engine, the second pump having a variable displacement;
- and
- a fixed displacement boost pump driven at the variable speed, wherein the boost pump provides fuel from a fuel tank to the second pump;
- wherein second pump comprises a fuel metering pump driven at the variable speed, wherein the fuel metering pump forwards the fuel from the boost pump to the gas turbine engine.
8 more elements
A gas turbine engine comprising:
- a compressor for compressing gas within the gas turbine engine;
- a fuel system for providing a fuel to the gas turbine engine;
- a combustor that mixes the fuel with the compressed gas and ignites the mixture of fuel and gas, causing the mixture to expand;
- a turbine for extracting energy from the expanding mixture;
- a lubrication system for providing a lubricant to the compressor and turbine;
- fluid pump system for pressurizing the fuel system and the lubrication system, the fluid pump system comprising:
- an electric motor having a variable speed;
- a first pump driven at the speed of the electric motor, the first pump having a variable displacement;
- a second pump driven at the speed of the electric motor;
- a third pump for providing input to the first pump, wherein the third pump is driven at the speed oldie electric motor;
- and
- a fourth pump for providing input to the second pump, wherein fourth pump is driven at the speed of the electric motor;
- wherein the first and third pump move fuel within the gas turbine engine and the second and fourth pump move lubricant within the gas turbine engine, or the first and third pump move lubricant within the gas turbine engine and the second and fourth pump move fuel within the gas turbine engine.
10 more elements
A fluid delivery system for a gas turbine engine, the fluid delivery system comprising:
- an electric motor having a variable speed;
- a first pump system having:
- a first pump driven by the motor to deliver a first fluid to the gas turbine engine, wherein the first pump comprises a variable displacement lubrication pump driven at the variable speed to provide a lubricant from a lubricant tank to the gas turbine engine;
- and
- a fixed displacement scavenge pump driven at the variable, speed, wherein the scavenge pump returns the lubricant from the gas turbine engine to the lubricant tank;
- and
- a second pump system having:
- a second pump driven by the motor to deliver a second fluid to the gas turbine engine, the second pump having a fixed displacement;
- and
- a fixed displacement boost pump driven at the variable speed, wherein the boost pump provides fuel from a fuel tank to the second pump;
- wherein second pump comprises a fuel metering pump driven at the variable speed, wherein the fuel metering pump forwards the fuel from the boost pump to the gas turbine engine.
8 more elements
Dependencies are inferred from the claim text.