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Title: Gas turbine blade with intra-span snubber

Abstract

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.

Inventors:
;
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1149933
Patent Number(s):
8790082
Application Number:
12/848,456
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B22 - CASTING B22C - FOUNDRY MOULDING
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

Merrill, Gary B., and Mayer, Clinton. Gas turbine blade with intra-span snubber. United States: N. p., 2014. Web.
Merrill, Gary B., & Mayer, Clinton. Gas turbine blade with intra-span snubber. United States.
Merrill, Gary B., and Mayer, Clinton. Tue . "Gas turbine blade with intra-span snubber". United States. https://www.osti.gov/servlets/purl/1149933.
@article{osti_1149933,
title = {Gas turbine blade with intra-span snubber},
author = {Merrill, Gary B. and Mayer, Clinton},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {7}
}

Works referenced in this record:

Components made of hardenable and non-hardenable materials
patent, September 1993


Investment casting
patent, April 1996


Aerodynamically optimized mid-span snubber for combustion turbine blade
patent, December 1997


High efficiency blade configuration for steam turbine
patent, April 2002


Blade with optimized vibration behavior
patent, January 2003


Moving blades for steam turbine
patent, January 2004


Investment casting cores
patent, August 2005


Aero-mixing of rotating blade structures
patent-application, June 2008


Snubber Assembly for Turbine Blades
patent-application, August 2011


Cooled Snubber Structure for Turbine Blades
patent-application, August 2011


    Works referencing / citing this record:

    Turbine blade mid-span shroud
    patent, March 2017


    Turbine blade mid-span shroud assembly
    patent, February 2017


    Tapered part-span shroud
    patent, January 2017