Patent ID: 11965422
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A variable guide vane assembly for a gas turbine engine stator having a shroud and a hub, the shroud and hub extending circumferentially, the shroud disposed radially outside of the hub, the shroud and hub collectively forming an annular gas path therebetween, the variable guide vane assembly comprising:
a plurality of vanes extending between the shroud and the hub, and the vanes are circumferentially disposed and spaced apart from one another, wherein each vane includes:
an inner radial end disposed adjacent the hub;
an outer radial end disposed adjacent the shroud;
an inner radial post;
an outer radial post; and
a rotational axis extending through the inner radial post and the outer radial post;
wherein each vane is pivotally mounted to rotate about its rotational axis; and

a plurality of rotational—translational mechanisms (RT mechanism), each respective RT mechanism in communication with a respective said vane, and each respective RT mechanism including a collar that remains static relative to the vane during rotation of the vane, the collar having an inner bore receiving the inner radial post of the respective vane, the collar including a ramp slot that extends circumferentially between a first lengthwise end and a second lengthwise end, the collar is in communication with the hub, the RT mechanism including a pin that extends outwardly from the inner radial post and is disposed in the ramp slot, and the RT mechanism is configured such that rotation of the vane relative to the first collar causes the pin to travel within the ramp slot and the respective said vane to translate linearly between the shroud and the hub.