Overspeed limiter for gas turbine fuel control

Patent · Tue Apr 01 04:00:00 EST 1986

OSTI ID:5821793

Peck, R E; White, A H

An improved fuel control is described for a gas turbine engine of the type having a main fuel supply conduit, a positive displacement pump for pumping fuel through the main fuel supply conduit, a metering valve positioned in the main fuel supply conduit downstream of the pump for metering the flow of fuel therethrough, a bypass conduit fluidly connecting the main fuel supply conduit on the discharge side of the pump to the main fuel supply conduit on the inlet side of the pump, a metering head regulator valve in the bypass conduit responsive to the pressure differential across the metering valve for regulating the flow in the bypass conduit so as to maintain a constant differential pressure across the metering valve and an overspeed valve mounted in the main fuel supply conduit for restricting fuel flow therethrough in response to overspeeds, the overspeed valve being mounted in the main fuel supply conduit downstream of the metering valve, means for referencing the metering head regulator valve to a pressure downstream of the overspeed valve and means for operating the overspeed valve. The improvement in the operating means described here consists of: a pressure directing valve in the fuel control for directing high pressure to the overspeed valve for producing a displacement thereof to a position in which fuel flow is restricted; a solenoid for operating the pressure directing valve; means responsive to engine speed for operating the solenoid, the engine speed responsive means comprising: first and second means responsive to engine speed for respectively generating two first signals which are functions of the engine speed and engine acceleration.

• Assignee: Chandler Evans Inc., West Hartford, CT
• Patent Number(s): US 4578945
• OSTI ID: 5821793
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
ACCELERATION
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLOWMETERS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METERING
METERS
PRESSURE EFFECTS
PUMPS
SIGNALS
SOLENOIDS
SPEED REGULATORS
SWITCHES
VALVES
VELOCITY