Base material with cooling air hole

Abstract

A base material ( 2 ) with a cooling air hole ( 1 ) is disclosed, means being present which prevent particles ( 5 ), which are located in the cooling air ( 4 ) which flows through the cooling air hole ( 1 ) during the operation of the cooling air hole ( 1 ), from closing the cooling air hole ( 1 ). In this arrangement, the means can consist in the edge of the cooling air hole ( 1 ) being uneven or having a ridge ( 3 ) or the cooling air hole ( 1 ) being star-shaped, ellipsoidal or linear or the cooling air hole ( 1 ) being circular and having lateral slots ( 7 ).

What is claimed is:  
     
         1 . A base material ( 2 ) with a cooling air hole ( 1 ), through which cooling air ( 4 ) laded with particles ( 5 ) flows during the operation of the cooling air hole ( 1 ), characterized in that means which prevent the particles ( 5 ) closing the cooling air holes ( 1 ) are present at the cooling air hole ( 1 ).  
     
     
         2 . The base material ( 2 ) as claimed in  claim 1 , characterized in that the means consist of the edge of the cooling air hole ( 1 ) being uneven or having a ridge ( 3 ).  
     
     
         3 . The base material ( 2 ) as claimed in  claim 2 , characterized in that the uneven edge or the ridge ( 3 ) appears due to punching or stamping the cooling air hole ( 1 ) or has already appeared during a process of casting the base material ( 2 ).  
     
     
         4 . The base material ( 2 ) as claimed in  claim 1 , characterized in that the means consist of a stirrup ( 6 ) which is located above the cooling air hole ( 1 ).  
     
     
         5 . The base material ( 2 ) as claimed in  claim 1 , characterized in that the means consists of a wire mesh ( 8 ) which is located above the cooling air hole ( 1 ).  
     
     
         6 . The base material ( 2 ) as claimed in  claim 5 , characterized in that the wire mesh ( 8 ) is arranged as a corrugation above the cooling air hole ( 1 ), so that it is fastened to the base material adjacent to the cooling air hole ( 1 ) and a certain distance exists between wire mesh ( 8 ) and cooling air hole ( 1 ).  
     
     
         7 . The base material ( 2 ) as claimed in  claim 1 , characterized in that the means consist of a star-shaped, ellipsoidal or linear cooling air hole ( 1 ) or of a circular cooling air hole ( 1 ) with lateral slots ( 7 ).  
     
     
         8 . The base material ( 2 ) as claimed in  claim 7 , characterized in that the cooling air hole ( 1 ) is manufactured by a laser, water jet or electrode jet.  
     
     
         9 . The base material ( 2 ) as claimed in one of  claims 1  to  8 , characterized in that the base material ( 2 ) is a part of a gas turbine.  
     
     
         10 . The base material ( 2 ) as claimed in  claim 9 , characterized in that the part of the gas turbine is a cast part or a sheet-metal part.