Frequency tuned hybrid blade
First Claim
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1. A fan blade comprising:
- a metal airfoil having first and second opposite sides extending radially between a root and a tip, and axially between a leading edge and a trailing edge for pressurizing air channeled thereover;
said airfoil further including a plurality of pockets disposed in said first side and separated by corresponding ribs; and
said ribs include radial and diagonal ribs respectively intersecting each other, wherein at least one diagonal rib is integrally joined to said radial rib and said diagonal rib extends toward said leading edge and said trailing edge from said radial rib.
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Abstract
A fan blade includes a metal airfoil having first and second opposite sides extending radially between a root and tip, and axially between a leading edge and a trailing edge. The airfoil further includes a plurality of pockets disposed in the first side and separated by corresponding ribs. A filler is bonded in the pocket, and is coextensive with the airfoil first side. Radial and diagonal ribs respectively intersect solely each other for selectively increasing torsional and bending stiffness to increase frequency margin between adjacent torsional and bending resonant modes of vibration.
78 Citations
19 Claims
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1. A fan blade comprising:
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a metal airfoil having first and second opposite sides extending radially between a root and a tip, and axially between a leading edge and a trailing edge for pressurizing air channeled thereover; said airfoil further including a plurality of pockets disposed in said first side and separated by corresponding ribs; and said ribs include radial and diagonal ribs respectively intersecting each other, wherein at least one diagonal rib is integrally joined to said radial rib and said diagonal rib extends toward said leading edge and said trailing edge from said radial rib. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A turbine fan blade comprising:
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a metal airfoil having first and second opposite sides extending radially between a root and a tip, and axially between a leading edge and a trailing edge for pressurizing air channeled thereover; said airfoil further including a plurality of pockets disposed in said first side and separated by corresponding ribs; a filler bonded in said pockets, and being coextensive with said airfoil first side; and said ribs include radial and diagonal ribs respectively intersecting each other, wherein at least one diagonal rib is integrally joined to said radial rib and said diagonal rib extends toward said leading edge and said trailing edge from said radial rib. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification