Gas turbine blade with intra-span snubber

Merrill, Gary B.; Mayer, Clinton

Title: Gas turbine blade with intra-span snubber

Patent · Tue Jul 29 00:00:00 EDT 2014

OSTI ID:1149933

Merrill, Gary B.; Mayer, Clinton

A gas turbine blade (10) including a hollow mid-span snubber (16). The snubber is affixed to the airfoil portion (14) of the blade by a fastener (20) passing through an opening (24) cast into the surface (22) of the blade. The opening is defined during an investment casting process by a ceramic pedestal (38) which is positioned between a ceramic core (32) and a surrounding ceramic casting shell (48). The pedestal provides mechanical support for the ceramic core during both wax and molten metal injection steps of the investment casting process.

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Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FC26-05NT42644

Assignee:: Siemens Energy, Inc. (Orlando, FL)

Patent Number(s):: 8,790,082

Application Number:: 12/848,456

OSTI ID:: 1149933

Country of Publication:: United States

Language:: English

References (12)

Damping element for independent turbomachine blades Battig, Josef https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4734010 US Patent Document 4,734,010	patent	March 1988
Device for damping vibrations in turbomachinery blades Roberts, Michael C. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5052890 US Patent Document 5,052,890	patent	October 1991
Components made of hardenable and non-hardenable materials Ortolano, Ralph J.; Ball, Kenneth A.; Serpa, Richard E. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5248241 US Patent Document 5,248,241	patent	September 1993
Investment casting Jago, Michael https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5505250 US Patent Document 5,505,250	patent	April 1996
Aerodynamically optimized mid-span snubber for combustion turbine blade Pfeifer, Nathan R.; Thomas, John P.; Dangerfield, Wally N. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5695323 US Patent Document 5,695,323	patent	December 1997
High efficiency blade configuration for steam turbine Tanuma, Tadashi; Sakamoto, Taro https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6375420 US Patent Document 6,375,420	patent	April 2002
Blade with optimized vibration behavior Huebner, Norbert https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6503053 US Patent Document 6,503,053	patent	January 2003
Moving blades for steam turbine Murakami, Itaru; Suzuki, Toshio; Okuno, Kenichi https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6682306 US Patent Document 6,682,306	patent	January 2004
Investment casting cores Beals, James T.; Draper, Samuel David; Lopes, Jose https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6929054 US Patent Document 6,929,054	patent	August 2005
Aero-mixing of rotating blade structures Truckenmueller, Franl; Stueer, Heinrich; Martin, Harry F. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20080145228 US Patent Application 11/639962; 20080145228	patent-application	June 2008
Snubber Assembly for Turbine Blades Marra, John J. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110194939 US Patent Application 12/701041; 20110194939	patent-application	August 2011
Cooled Snubber Structure for Turbine Blades Mayer, Clinton A.; Campbell, Christian X.; Whalley, Andrew https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110194943 US Patent Application 13/023651; 20110194943	patent-application	August 2011

Cited By (3)

Turbine blade mid-span shroud Collins, Daryl R.; Butz, David https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9587496 US Patent Document 9,587,496	patent	March 2017
Turbine blade mid-span shroud assembly Spracher, David Randolph; Bruce, Kevin Leon; Harris, Jr., John Wesley https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9574450 US Patent Document 9,574,450	patent	February 2017
Tapered part-span shroud Chouhan, Rohit; Davis, Holly Renae; Valliappan, Lakshmanan https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9546555 US Patent Document 9,546,555	patent	January 2017

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