Levered counterweight feathering system
AssigneeGeneral Electric Company
InventorsNicholas M. Daggett, Gert Johannes van der Merwe, Daniel Alan Niergarth, Brian Lewis Devendorf
Life of this patent
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Abstract
A fan assembly for a gas turbine engine includes a fan disk, a trunnion, a fan blade, and a counterweight assembly. The fan disk is configured to rotate about an axial centerline of the gas turbine engine when installed in the gas turbine engine. The trunnion is mounted to the fan disk and defines a slot extending through a portion of the trunnion. The fan blade defines a pitch axis and is rotatably attached to the fan disk about its pitch axis through the trunnion. The counterweight assembly includes a link arm extending to the trunnion and an engagement device mounted to the link arm that is disposed to move through the slot of the trunnion.
Claims18
A fan assembly for a gas turbine engine defining an axial direction and an axial centerline, the fan assembly comprising:
- a fan disk configured to rotate about the axial centerline of the gas turbine engine when installed in the gas turbine engine;
- a trunnion mounted to the fan disk, the trunnion defining a slot extending through a portion of the trunnion;
- a fan blade defining a pitch axis and rotatably attached to the fan disk about its pitch axis through the trunnion;
- a counterweight assembly comprising:
- a link arm extending to the trunnion;
- and
- an engagement device mounted to the link arm, wherein the engagement device is disposed to move through the slot of the trunnion;
- and
- a damper located in the slot and disposed to occupy a portion of the slot, wherein the damper is configured to engage the engagement device as the engagement device moves through a portion of the slot.
A trunnion for a fan assembly of a gas turbine engine defining an axial direction and an axial centerline, the fan assembly comprising a fan disk configured to rotate about the axial centerline of the gas turbine engine when installed in the gas turbine engine and a first counterweight assembly comprising a first link arm, the trunnion comprising:
- a body extending along a pitch axis;
- and
- a disk coupled to or integral with the body, wherein the body is configured to couple to a fan blade of the fan assembly to rotate the fan blade about the pitch axis, wherein the disk defines a slot for engaging with an engagement device extending from the first link arm to facilitate movement of the trunnion relative to the first link arm for a first range of motion;
- a damper located in the slot and disposed to occupy a portion of the slot, wherein the damper is configured to engage the engagement device as the engagement device moves through a portion of the slot.
Dependencies are inferred from the claim text.