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US 2016/0238034 A1Published application
Fan assembly
AssigneeROLLS-ROYCE plc
InventorsRoy D. Fulayter, Jonathan M. Rivers
Life of this patent
Estimating the term…
Abstract
A fan assembly for use in a gas turbine engine includes a fan wheel and a plurality of blades extending radially from the fan wheel away from a central axis of the fan assembly. Each of the blades includes a root coupled with the fan wheel and an airfoil extending radially outwardly from the root. The blades are adapted to rotate about the central axis to push air.
Claims20
A fan assembly for use in a gas turbine engine, the fan assembly comprising
- a fan wheel,
- a plurality of blades extending radially from the fan wheel away from a central axis, each of the blades including a root coupled with the fan wheel and an airfoil extending radially outwardly from the root, and
- an annular mistuning band positioned adjacent to the fan wheel along the central axis and engaged with the roots of a predetermined number of more than one but less than all of the plurality of blades.
A fan assembly for use in a gas turbine engine, the fan assembly comprising
- a fan including a fan wheel and a plurality of blades extending radially outward from the fan wheel relative to a central axis, each of the blades including a root coupled with the fan wheel and an airfoil extending radially outward from the root,
- a fore retainer coupled to the fan wheel and adapted to limit axial movement of the plurality of blades along the central axis,
- an aft retainer spaced apart axially from the fore retainer to locate the plurality of blades therebetween, the aft retainer coupled to the fan wheel and adapted to limit axial movement of the plurality of blades, and
- an annular mistuning band extending around the central axis, the annular mistuning band positioned axially between the fore retainer and the aft retainer and engaging the root of a predetermined number of more than one but less than all of the plurality of blades.
1 more element
A method of assembling a fan assembly, the method comprising
- coupling roots of a plurality of blades to a fan wheel so that the blades extend radially from the fan wheel away from a central axis to provide a fan, and
- positioning an annular mistuning band that extends around the central axis adjacent to the fan along the central axis such that the annular mistuning band contacts the root of a predetermined subset of more than one but less than all of the plurality of blades.
Dependencies are inferred from the claim text.