초록 ▼

Blade pitch varying means for use in a gas turbine engine are disclosed. The blade pitch varying means may be used on an engine with a single row or two counterrotating rows of variable pitch blades which are disposed outwardly from an annular gas flowpath and which are connected with a rotating air

Blade pitch varying means for use in a gas turbine engine are disclosed. The blade pitch varying means may be used on an engine with a single row or two counterrotating rows of variable pitch blades which are disposed outwardly from an annular gas flowpath and which are connected with a rotating airfoil within the flowpath. The blade pitch varying means comprise actuation means, bearing means, and gearing means. The actuation means are in a nonrotating reference frame disposed inwardly from the flowpath and deliver an axial force. The bearing means transmit the axial force from the nonrotating into a rotating reference frame which contains both the propulsor blade and the airfoil in the gas flowpath. The gearing means are located in the rotating reference frame and convert the axial force into a force for varying the blade pitch.

대표청구항 ▼

In a gas turbine engine including an annular flowpath, a rotor with rotor blades extending into said flowpath, a hollow static structure inward of and coaxial with said flowpath for supporting said rotor, and a plurality of propulsor blades connected to said rotor blades radially outward of said flo

In a gas turbine engine including an annular flowpath, a rotor with rotor blades extending into said flowpath, a hollow static structure inward of and coaxial with said flowpath for supporting said rotor, and a plurality of propulsor blades connected to said rotor blades radially outward of said flowpath, propulsor blade pitch varying means comprising: actuation means located within said static structure along the engine centerline for delivering an axial force; bearing means for transmitting said axial force into a frame of reference with said rotor; linkage means for connecting said actuation means with said bearing means, said linkage means including a unison ring with a plurality of inwardly facing teeth adapted to slidingly engage a plurality of axially extending splines coaxial with said static structure; and gearing means rotating with said rotor for converting said axial force into a force for varying the pitch of each of said propulsor blades.