Gas turbine engine with variable guide vanes and a unison ring
AssigneeROLLS-ROYCE plc
InventorMichael G. Kennedy
Life of this patent
Estimating the term…
Abstract
A gas turbine engine comprises a plurality of variable guide vanes, a unison ring, and a lever arrangement connecting the unison ring to the variable guide vanes. The lever arrangement comprises a lever pin received by the unison ring, and a bush provided between the lever pin and the unison ring. The bush comprises a sprung region biased outwardly away from the lever pin towards the unison ring.
Claims20
A gas turbine engine comprising:
- a plurality of variable guide vanes;
- a unison ring;
- a lever arrangement connecting the unison ring to at least one of the variable guide vanes, wherein the lever arrangement comprises a lever pin received by the unison ring;
- and
- a bush provided between the lever pin and the unison ring, wherein the bush comprises a spring biased outwardly away from the lever pin towards the unison ring, wherein the spring and the lever pin define a volume into which the spring is deflected.
A method of manufacturing a gas turbine engine having a plurality of variable guide vanes, a unison ring, a lever arrangement connecting the unison ring to the variable guide vanes, wherein the lever arrangement comprises a lever pin received by the unison ring, and a bush provided between the lever pin and the unison ring, wherein the bush comprises a spring biased outwardly away from the lever pin and towards the unison ring, wherein the spring and the lever pin define a volume into which the spring is deflected, the method comprising:
- compressing the spring of the bush and inserting the bush into the unison ring whilst the spring is compressed.
A gas turbine engine comprising:
- a plurality of variable guide vanes;
- a unison ring;
- a lever means for connecting the unison ring to at least one of the variable guide vanes, wherein the lever means comprises a pinning means received by the unison ring;
- and
- a bush provided between the pinning means and the unison ring, wherein the bush comprises a first sprung means for spring biasing the bush outwardly away from the pinning means towards the unison ring, wherein the first sprung means and the pinning means define a volume into which the first sprung means is deflected.
Dependencies are inferred from the claim text.