Grouped reaction nozzle tip shrouds with integrated seals

Abstract

A reaction turbine stator vane segment comprising an integral grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, the arcuate tip shroud formed with plural seal components extending radially inwardly from the tip shroud.

1 . A reaction turbine stator vane segment comprising an integral grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, said arcuate tip shroud formed with plural seal components extending radially inwardly from said tip shroud.  
   
   
       2 . The reaction turbine stator vane segment of  claim 1  wherein said plural seal components include a combination of strip seals and brush seals.  
   
   
       3 . The reaction turbine stator vane segment of  claim 1  wherein said plural seal components include a combination of labyrinth seal teeth and brush seals.  
   
   
       4 . The reaction turbine stator vane segment of  claim 1  wherein said plural seal components include a pair of strip seals, one on either side of a brush seal.  
   
   
       5 . The reaction turbine stator vane segment of  claim 1  wherein said plural seal components include a pair of labyrinth seal teeth, one on either side of a brush seal.  
   
   
       6 . The reaction turbine stator vane segment of  claim 1  wherein said plural seal components are mounted in an arcuate insert and said arcuate insert is received within a groove in said tip shroud.  
   
   
       7 . The reaction turbine stator vane segment of  claim 6  wherein said plural seal components include a brush seal flanked by a pair of labyrinth seal teeth.  
   
   
       8 . The reaction turbine stator vane segment of  claim 1  wherein said integral grouping is machined from a single solid block.  
   
   
       9 . The reaction turbine stator vane segment of  claim 1  wherein said plural seal components include a brush seal insert received in a groove in said tip shroud, with additional seal components on opposite sides of said brush seal insert.  
   
   
       10 . The reaction turbine stator vane segment of  claim 9  wherein said additional seal components comprise strip seals.  
   
   
       11 . The reaction turbine stator vane segment of  claim 9  wherein said additional seal components comprise labyrinth seal teeth.  
   
   
       12 . A reaction turbine stator vane segment comprising a unitary machined grouping of plural vanes, an arcuate tip shroud connected between radially inner tips of the vanes, and an arcuate mounting portion extending across radially outer tips of the vanes, said arcuate tip shroud formed with plural seal components extending radially inwardly from said tip shroud, wherein said plural seal components include a brush seal insert received in a groove in said tip shroud, with additional seal components on opposite sides of said brush seal.  
   
   
       13 . The reaction turbine stator vane segment of  claim 12  wherein said additional seal components comprise strip seals mounted in a radially inner face of the tip shroud.  
   
   
       14 . The reaction turbine stator vane segment of  claim 12  wherein said additional seal components comprise labyrinth seal teeth integrally formed with a radially inner face of the tip shroud.  
   
   
       15 . The reaction turbine stator vane segment of  claim 12  wherein said additional seal components are mounted in said brush seal insert.