Transition piece impingement sleeve for a gas turbine

Abstract

An impingement sleeve for a transition piece of a gas turbine is disclosed. The impingement sleeve generally includes a first casing configured to surround a portion of an inner duct of the transition piece and a second casing configured to surround a portion of the inner duct. Additionally, the impingement sleeve may include a joint defined between the first and second casings. The joint may include a plurality of fasteners configured to attach the first casing to the second casing.

1 . An impingement sleeve for a transition piece of a gas turbine, the impingement sleeve comprising:
 a first casing configured to surround a portion of an inner duct of the transition piece;   a second casing configured to surround a portion of the inner duct; and   a substantially flat joint defined between said first and second casings, said substantially flat joint including a plurality of fasteners configured to attach said first casing to said second casing.   
     
     
         2 . The impingement sleeve of  claim 1 , wherein said substantially flat joint is configured as a lap joint. 
     
     
         3 . The impingement sleeve of  claim 1 , wherein said first casing includes at least one flange and said second casing includes at least one shoulder, said at least one flange being attached to said at least one shoulder at said substantially flat joint. 
     
     
         4 . The impingement sleeve of  claim 3 , wherein said at least one flange and said at least one shoulder each define a plurality of openings, said plurality of openings being configured to receive said plurality of fasteners. 
     
     
         5 . The impingement sleeve of  claim 3 , wherein said at least one flange is disposed substantially parallel to said at least one shoulder at said substantially flat joint. 
     
     
         6 . The impingement sleeve of  claim 3 , wherein at least one of said at least one flange and said at least one shoulder is configured to extend substantially tangent to a profile of the impingement sleeve at said substantially flat joint. 
     
     
         7 . The impingement sleeve of  claim 1 , further comprising a plurality of threaded nuts mounted to an inner surface of at least one of said first casing and said second casing, said plurality of fasteners comprising a plurality of threaded fasteners being configured to be secured within said plurality of threaded nuts. 
     
     
         8 . The impingement sleeve of  claim 7 , wherein each of said plurality of threaded nuts is configured as a floating nut. 
     
     
         9 . The impingement sleeve of  claim 7 , wherein said plurality of threaded nuts is grouped within at least one channel mounted to said inner surface. 
     
     
         10 . The impingement sleeve of  claim 9 , wherein a profile of said at least one channel is configured to generally correspond to a profile of said inner surface such that said at least one channel is positioned substantially flush against said inner surface. 
     
     
         11 . The impingement sleeve of  claim 1 , wherein said first casing includes at least one lip extending substantially perpendicularly from an end of said first casing and said second casing includes at least one lip extending substantially perpendicularly from an end of said second casing, said at least one lip of said first casing being configured to be attached to said at least one lip of said second casing. 
     
     
         12 . An impingement sleeve for a transition piece of a gas turbine, the impingement sleeve comprising:
 a first casing configured to surround a portion of an inner duct of the transition piece;   a second casing configured to surround a portion of the inner duct;   a joint defined between said first and second casings, said joint including a plurality of threaded fasteners configured to attach said first casing to said second casing; and   at least one channel mounted to an inner surface of at least one of said first casing and said second casing, said at least one channel including a plurality of threaded nuts attached thereto.   
     
     
         13 . The impingement sleeve of  claim 12 , wherein said joint is configured to be substantially flat. 
     
     
         14 . The impingement sleeve of  claim 12 , wherein said first casing includes at least one flange and said second casing includes at least one shoulder, said at least one flange being attached to said at least one shoulder at said joint. 
     
     
         15 . The impingement sleeve of  claim 14 , wherein said at least one flange and said at least one shoulder each define a plurality of openings, said plurality of openings being configured to receive said plurality of fasteners. 
     
     
         16 . The impingement sleeve of  claim 14 , wherein said at least one flange is disposed substantially parallel to said at least one shoulder at said joint. 
     
     
         17 . The impingement sleeve of  claim 14 , wherein at least one of said at least one flange and said at least one shoulder is configured to extend substantially tangent to a profile of the impingement sleeve at said joint. 
     
     
         18 . The impingement sleeve of  claim 12 , wherein each of said plurality of threaded nuts is configured as a floating nut. 
     
     
         19 . The impingement sleeve of  claim 12 , wherein a profile of said at least one channel is configured to generally correspond to a profile of said inner surface such that said at least one channel is positioned substantially flush against said inner surface. 
     
     
         20 . The impingement sleeve of  claim 12 , wherein said first casing includes at least one lip extending substantially perpendicularly from an end of said first casing and said second casing includes at least one lip extending substantially perpendicularly from an end of said second casing, said at least one lip of said first casing being configured to be attached to said at least one lip of said second casing.