Fluid-cooled seal arrangement for a gas turbine engine

Abstract

A rotational component for a gas turbine engine includes at least one passage with a semi-spherical end.

What is claimed is:  
     
         1 . A rotational component for a gas turbine engine comprising:
 at least one passage with a semi-spherical end.   
     
     
         2 . The rotational component as recited in  claim 1 , wherein said at least one passage is an oil communication passage. 
     
     
         3 . The rotational component as recited in  claim 1 , wherein said at least one passage is a blind hole. 
     
     
         4 . A gas turbine engine comprising:
 a rotational component having at least one passage with a semi-spherical end.   
     
     
         5 . The gas turbine engine as recited in  claim 4 , wherein said rotational component is a seal runner. 
     
     
         6 . The gas turbine engine as recited in  claim 5 , wherein said at least one passage is an oil communication passage. 
     
     
         7 . The rotational component as recited in  claim 6 , wherein said at least one passage is a blind hole. 
     
     
         8 . The gas turbine engine as recited in  claim 6 , wherein said oil communication passage is an outlet passage. 
     
     
         9 . The gas turbine engine as recited in  claim 4 , wherein said rotational component includes a cantilevered section. 
     
     
         10 . The gas turbine engine as recited in  claim 9 , wherein said cantilevered section collects and directs a lubricant toward an internal inlet passage 
     
     
         11 . The gas turbine engine as recited in  claim 10 , wherein said cantilevered section include a hook-shaped end section. 
     
     
         12 . A method of forming a passage in a rotation component comprising:
 forming a semi-spherical end at an end of the passage.   
     
     
         13 . The method as recited in  claim 12 , further comprising:
 drilling the passage;   inserting a ball-endmill into the passage to form the end.   
     
     
         14 . The method as recited in  claim 12 , further comprising:
 drilling the passage with a drill tool having spherical shaped flutes.