Flat Bottom Damper Pin For Turbine Blades
First Claim
Patent Images
1. A damper pin for a bucket damper slot in at least one of two adjoining buckets installed in a rotor in a turbine, the damper pin comprising:
- a. a generally rounded top portion, the rounded top portion configured to contact said adjoining buckets prior to full-speed rotation of said rotor; and
b. a generally flat bottom portion.
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Accused Products
Abstract
A damper system for the buckets of a gas turbine engine. The damper system may include damper pins having a generally rounded top portion and a generally flat bottom portion along substantially the entire length thereof. The generally flat bottom portion may allow addition or removal of material to or from the pin in order to achieve an optimal dynamic weight ratio.
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Citations
18 Claims
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1. A damper pin for a bucket damper slot in at least one of two adjoining buckets installed in a rotor in a turbine, the damper pin comprising:
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a. a generally rounded top portion, the rounded top portion configured to contact said adjoining buckets prior to full-speed rotation of said rotor; and b. a generally flat bottom portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A turbine engine comprising:
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a. a rotor having a generally circular periphery; b. a plurality of buckets mounted about the periphery of the rotor, each of said buckets including an airfoil extending outward from a platform; and c. a damper for damping vibrations of said plurality of buckets, the damper including an elongate body, the elongate body being sized and shaped for receipt within a bucket damper slot formed in undercuts of said plurality of buckets so that the elongate body frictionally engages said undercuts to dampen vibrations of said buckets, said damper being generally symmetrical in cross section and comprising a generally rounded top portion, said generally rounded top portion configured to contact adjoining buckets prior to full-speed rotation of said rotor, said damper further comprising a generally flat bottom portion. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of fabricating a damper pin for a bucket of a gas turbine, comprising the steps of:
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a. providing a pin having a generally rounded top portion; b. determining an optimal dynamic weight ratio for said pin in said bucket; c. adding material to, or removing a portion of material from, said pin to create a generally flat bottom portion along substantially the entire length of said pin, the weight of said damping pin following addition or removal of said material corresponding to said dynamic weight ratio for said bucket. - View Dependent Claims (15, 16, 17, 18)
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Specification