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

Claim 7:
8. 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 first rotational-translational mechanisms (RT mechanism), and a plurality of second RT mechanisms, and wherein for each said vane:
a said first RT mechanism of the plurality of first RT mechanisms includes a first collar and a first pin, wherein the first collar remains static relative to the vane during rotation of the vane, and the first collar has a first inner bore configured to receive the outer radial post, wherein a first said ramp slot extends circumferentially in the first collar and the first pin is attached to the outer radial post and is received within the first ramp slot; and
a said second RT mechanism of the plurality of second RT mechanisms includes a second collar and a second pin, wherein the second collar remains static relative to the vane during rotation of the vane, and the second collar has a second inner bore configured to receive the inner radial post, wherein a second said ramp slot extends circumferentially in the second collar and the second pin is attached to the inner radial post and is received within the second ramp slot.