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US 9,309,782 B2Granted
Flat bottom damper pin for turbine blades
AssigneeGeneral Electric Company
InventorsSpencer Aaron Kareff, Matthew Robert Piersall
Life of this patent
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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.
Claims4
A method of fabricating a damper pin for a bucket of a gas turbine, comprising the steps of:
- a. providing a pin having a generally rounded top portion;
- b. determining an optimal dynamic weight ratio for said pin in said bucket;
- 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, and
- the method further comprising the steps of
- c. installing said damper pin in a bucket damper slot of a gas turbine,
- d. performing an engine test on said gas turbine;
- e. determining from said engine test if said damper pin is performing at said optimal dynamic weight ratio;
- and
- f. if said damper pin is not performing at said optimal dynamic weight ratio, adding or removing material to or from said flat bottom portion along substantially the entire length thereof, maintaining a substantially flat surface along substantially the entire length of said pin.
6 more elements
Dependencies are inferred from the claim text.