Cooled ring segment

Abstract

A ring segment for a gas turbine engine includes a panel and a first mating edge cooling system. Cooling fluid is provided to an outer side of the panel and an inner side of the panel defines at least a portion of a hot gas flow path. A cooling system receives a portion of the cooling fluid provided to the outer side and includes at least one impingement chamber. Each impingement chamber includes at least one metering supply passage and at least one metering discharge passage. The metering supply passage(s) extends from the outer side of the panel to the impingement chamber. Cooling fluid impinges on a surface of the panel defining the impingement chamber as it flows therein through the metering supply passage(s). The metering discharge passage(s) extends from the impingement chamber to a first or second mating edge of the panel.

1 . A ring segment for a gas turbine engine comprising:
 a panel having a leading edge, a trailing edge, a first mating edge, a second mating edge, an outer side, and an inner side, wherein cooling fluid is provided to said outer side and said inner side defines at least a portion of a hot gas flow path through the gas turbine engine;   a first mating edge cooling system within said panel that receives a portion of the cooling fluid provided to said outer side of said panel for cooling said panel at one of said first and second mating edges, said first mating edge cooling system comprising at least one first mating edge impingement chamber, each first mating edge impingement chamber including:
 at least one metering supply passage extending from said outer side of said panel to said first mating edge impingement chamber, wherein cooling fluid impinges on a surface of said panel defining said first mating edge impingement chamber as it flows into said first mating edge impingement chamber through said at least one metering supply passage; and 
 at least one metering discharge passage that extends from said first mating edge impingement chamber to said one of said first and second mating edges of said panel. 
   
     
     
         2 . The ring segment of  claim 1 , further comprising a second mating edge cooling system within said panel that receives a portion of the cooling fluid provided to said outer side of said panel for cooling said panel at the other of said first and second mating edges, said second mating edge cooling system comprising at least one second mating edge impingement chamber, each second mating edge impingement chamber including:
 at least one metering supply passage extending from said outer side of said panel to said second mating edge impingement chamber, wherein cooling fluid impinges on a surface of said panel defining said second mating edge impingement chamber as it flows into said second mating edge impingement chamber through said at least one metering supply passage; and   at least one metering discharge passage that extends from said second mating edge impingement chamber to the other of said first and second mating edges of said panel.   
     
     
         3 . The ring segment of  claim 2 , further comprising a trailing edge cooling system within said panel that receives a portion of the cooling fluid provided to said outer side of said panel for cooling said panel at said trailing edge, said trailing edge cooling system comprising at least one trailing edge impingement chamber, each trailing edge impingement chamber including:
 at least one supply passage extending from said outer side of said panel to said trailing edge impingement chamber; and   at least one discharge passage that extends from said trailing edge impingement chamber to said trailing edge of said panel.   
     
     
         4 . The ring segment of  claim 3 , wherein said impingement chambers of said trailing edge cooling system and said first and second mating edge cooling systems are not in fluid communication with one another. 
     
     
         5 . The ring segment of  claim 3 , further comprising a leading edge cooling system within said panel that receives a portion of the cooling fluid provided to said outer side of said panel for cooling said panel at said leading edge, said leading edge cooling system comprising at least one leading edge impingement chamber, each leading edge impingement chamber including:
 at least one supply passage extending from said outer side of said panel to said leading edge impingement chamber; and   at least one discharge passage that extends from said leading edge impingement chamber to said leading edge of said panel.   
     
     
         6 . The ring segment of  claim 5 , wherein said supply passages of said leading edge cooling system and said trailing edge cooling system comprise metering supply passages, wherein said metering supply passages of said leading edge cooling system include diameters that are larger than diameters of said metering supply passages of said trailing edge cooling system. 
     
     
         7 . The ring segment of  claim 1 , wherein said at least one first mating edge impingement chamber comprising a single first mating edge impingement chamber extending from near said leading edge to near said trailing edge of said panel. 
     
     
         8 . The ring segment of  claim 1 , further comprising an impingement tube located radially outwardly from said panel, said impingement tube comprising a plurality of impingement holes, wherein the cooling fluid that is provided to said outer side of said panel passes through said impingement holes in said impingement tube and impinges on said outer side of said panel. 
     
     
         9 . A ring segment for a gas turbine engine comprising:
 a panel having side edges comprising a leading edge, a trailing edge, a first mating edge, and a second mating edge, said panel further including an outer side, and an inner side, wherein cooling fluid is provided to said outer side, and said inner side defines at least a portion of a hot gas flow path through the gas turbine engine;   a central recessed portion defining a recessed surface formed in said outer side and surrounded by a rim portion comprising an unrecessed portion extending around an outer periphery of the recessed portion along each of said side edges;   recess portion walls defining said outer periphery of said recessed portion, each said recess portion wall extending radially between said recessed surface and said unrecessed portion; and   at least one impingement chamber located in said panel, said at least one impingement chamber including:
 at least one metering supply passage extending from said outer side for passage of cooling fluid into said impingement chamber to impinge on and cool a surface of said impingement chamber; and 
 at least one metering discharge passage extending from said impingement chamber to one of said side edges for passage of cooling fluid from said impingement chamber to said one side edge. 
   
     
     
         10 . The ring segment of  claim 9 , wherein said at least one impingement chamber comprises an elongated dimension extending parallel to said one side edge that is substantially greater than a width dimension extending generally perpendicular to said one side edge. 
     
     
         11 . The ring segment of  claim 10 , wherein said at least one metering supply passage comprises a plurality of metering supply passages located along said elongated dimension of said at least one impingement chamber. 
     
     
         12 . The ring segment of  claim 11 , wherein said at least one impingement chamber comprises a plurality of impingement chambers located along said one edge. 
     
     
         13 . The ring segment of  claim 11 , wherein said at least one metering discharge passage comprises a plurality of metering discharge passages located along said elongated dimension of said at least one impingement chamber. 
     
     
         14 . The ring segment of  claim 13 , wherein said at least one impingement chamber comprises a plurality of said impingement chambers located along both said first and second mating edges. 
     
     
         15 . The ring segment of  claim 14 , wherein:
 said impingement chambers are EDM drilled into said panel from one of said leading edge and said trailing edge of said panel; and   openings of said impingement chambers at said one of said leading edge and said trailing edge are sealed to effect a discharge of cooling fluid from said impingement chambers only through said metering discharge passages.   
     
     
         16 . The ring segment of  claim 9 , wherein said at least one impingement chamber is located in said panel between at least one of said recess portion walls and one of said mating edges. 
     
     
         17 . The ring segment of  claim 9 , further comprising a trailing edge cooling system comprising a plurality of circumferentially spaced apart impingement chambers having an elongated dimension extending parallel to said mating edges and located between said recessed surface and said inner side, each said impingement chamber of said trailing edge cooling system including:
 at least one metering supply passage extending from said recessed surface to said impingement chamber for passage of cooling fluid into said impingement chamber to impinge on and cool a surface of said impingement chamber; and   a discharge passage extending from said impingement chamber to said trailing edge for passage of cooling fluid from said impingement chamber to said trailing edge.   
     
     
         18 . The ring segment of  claim 17 , wherein:
 at least one metering supply passage of at least one of said impingement chambers of said trailing edge cooling system is located near said leading edge; and   said discharge passage of said at least one impingement chamber of said trailing edge cooling system is located at said trailing edge.   
     
     
         19 . The ring segment of  claim 9 , wherein said at least one impingement chamber comprising a single impingement chamber extending from near said leading edge to near said trailing edge of said panel.