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US 10,767,500 B2Granted
Fan blade pitch setting
AssigneeGE Aviation Systems LLC
InventorSukeyuki Kobayashi
Life of this patent
Estimating the term…
Abstract
There are provided techniques and apparatuses for fan blade pitch setting. For example, there is provided an impeller including a ring disposed in a hub of the impeller. The ring can include a recess shaped and positioned to impart a specified pitch angle to a blade extending outwardly from the ring through the hub.
Claims14
An impeller comprising:
- a ring disposed in a hub of the impeller, wherein the hub has a slot formed through a wall of the hub such that the slot has an open end at one edge of the wall and is configured to receive a portion of a blade through the open end, the ring including a non-circular recess shaped and positioned to impart a specified pitch angle to the blade extending outwardly from the ring through the slot of the hub, the non-circular recess being elongated in a direction different from the slot and non-parallel to a vertical axis where the vertical axis is parallel to an axis of rotation of the impeller;
- wherein the blade includes a first portion and a second portion joined by a rod, the second portion engaging the recess to position the blade at the specified pitch angle.
An impeller comprising:
- a blade including a portion shaped to mate with a recess of a ring disposed in a hub of the impeller, the recess being elongated in a direction different from the slot and non-parallel to a vertical axis to provide a specified pitch angle for the blade, the vertical axis being parallel to an axis of rotation of the impeller, and the hub has a slot formed through a wall of the hub such that the slot has an open end at one edge of the wall and is configured to receive a portion of the blade through the open end.
An impeller assembly, comprising:
- a set of blades;
- a hub that has a set of slots formed through one wall of the hub such that each slot has an open end at one edge of the wall and is configured to receive a portion of a blade from a set of blades through the open end;
- and
- a pitch-setting ring disposed on an inner wall of the hub, the pitch-setting ring including a set of recesses, wherein each of the recesses is fully enclosed and elongated in a direction non-parallel to a vertical axis and configured to secure the blade from the set of blades at a specified pitch angle and such that the blade is positioned such that it extends through a slot wherein the vertical axis is parallel to an axis of rotation of the impeller.
1 more element
Dependencies are inferred from the claim text.