Turbine blade damping device with controlled loading
Abstract
A damping structure for a turbomachine rotor. The damping structure including an elongated snubber element including a first snubber end rigidly attached to a first blade and extending toward an adjacent second blade, and an opposite second snubber end positioned adjacent to a cooperating surface associated with the second blade. The snubber element has a centerline extending radially inwardly in a direction from the first blade toward the second blade along at least a portion of the snubber element between the first and second snubber ends. Rotational movement of the rotor effects relative movement between the second snubber end and the cooperating surface to position the second snubber end in frictional engagement with the cooperating surface with a predetermined damping force determined by a centrifugal force on the snubber element.
- Inventors:
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1096039
- Patent Number(s):
- 8540488
- Application Number:
- 12/637,106
- Assignee:
- Siemens Energy, Inc. (Orlando, FL)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- DOE Contract Number:
- FC26-05NT42644
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Marra, John J. Turbine blade damping device with controlled loading. United States: N. p., 2013.
Web.
Marra, John J. Turbine blade damping device with controlled loading. United States.
Marra, John J. Tue .
"Turbine blade damping device with controlled loading". United States. https://www.osti.gov/servlets/purl/1096039.
@article{osti_1096039,
title = {Turbine blade damping device with controlled loading},
author = {Marra, John J},
abstractNote = {A damping structure for a turbomachine rotor. The damping structure including an elongated snubber element including a first snubber end rigidly attached to a first blade and extending toward an adjacent second blade, and an opposite second snubber end positioned adjacent to a cooperating surface associated with the second blade. The snubber element has a centerline extending radially inwardly in a direction from the first blade toward the second blade along at least a portion of the snubber element between the first and second snubber ends. Rotational movement of the rotor effects relative movement between the second snubber end and the cooperating surface to position the second snubber end in frictional engagement with the cooperating surface with a predetermined damping force determined by a centrifugal force on the snubber element.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 24 00:00:00 EDT 2013},
month = {Tue Sep 24 00:00:00 EDT 2013}
}
Works referenced in this record:
Damping element for independent turbomachine blades
patent, March 1988
- Battig, Josef
- US Patent Document 4,734,010
Coupling devices of moving blades of steam turbines
patent, March 1981
- Fujii, Mineo
- US Patent Document 4,257,743
Turbine engine blade with airfoil projection
patent, March 1981
- Betts, Robert K.; Grisik, John J.; Zelahy, John W.
- US Patent Document 4,257,741
Aerodynamically optimized mid-span snubber for combustion turbine blade
patent, December 1997
- Pfeifer, Nathan R.; Thomas, John P.; Dangerfield, Wally N.
- US Patent Document 5,695,323
Steam turbine
patent, January 2002
- Namura, Kiyoshi; Saito, Eiji; Yamazaki, Yoshiaki
- US Patent Document 6,341,941