초록 ▼

A staged fuel system for a gas turbine engine in which the main burners are supplied with fuel through fluid pressure actuated, servo-controlled valves. All pilot and main burners are supplied from a single manifold. However, fuel flow to the main burners is controlled by the servo-valves which are

A staged fuel system for a gas turbine engine in which the main burners are supplied with fuel through fluid pressure actuated, servo-controlled valves. All pilot and main burners are supplied from a single manifold. However, fuel flow to the main burners is controlled by the servo-valves which are controlled by pressure in a servo-manifold fed with fuel tapped from a high pressure region of the fuel system. Thus, a simple variable control valve on the outlet of the servo-manifold is able to control fuel staging.

대표청구항 ▼

[ I claim:] [1.] A fuel system for a gas turbine engine, comprising:a multiplicity of fuel injector means,a fuel supply manifold with which all fuel injector means are in fuel supply communication, some of the fuel injector means being in free communication with the fuel supply manifold to receive f

[ I claim:] [1.] A fuel system for a gas turbine engine, comprising:a multiplicity of fuel injector means,a fuel supply manifold with which all fuel injector means are in fuel supply communication, some of the fuel injector means being in free communication with the fuel supply manifold to receive fuel from a fuel supply system, and further ones of the fuel injector means being connected to the fuel supply manifold through a plurality of servo-operated valves selectively operable to supply fuel to the further ones of the fuel injector means for increased fuel burning,a servo-pressure manifold interconnecting said plurality of servo-operated valves, said servo-pressure manifold being arranged to carry a flow of fuel from a source of high pressure in the fuel supply system to a region of low pressure in the fuel supply system,restrictor means disposed upstream of the servo-pressure manifold to cause a substantial reduction in pressure of fuel flowing in the servo-pressure manifold, anda variable valve disposed downstream of the servo-pressure manifold to stem the flow of fuel in the servo-pressure manifold whereby to control pressure in the servo-pressure manifold to actuate the servo-operated valves.