Reaction-type steam turbine

Abstract

Disclosed is a reaction-type steam turbine, including: a housing provided at a first side thereof with a steam inlet tube and at a second side thereof with a steam outlet tube, the housing having a space formed therein; and a turbine shaft provided to pass through the space of the housing, with a plurality of disk blades fitted over the turbine shaft, wherein a guide blade assembly is coupled to the turbine shaft at a position between a duct of the steam inlet tube and the disk blades, the guide blade assembly guiding steam introduced through the steam inlet tube into the space of the housing toward the disk blades.

1 . A reaction-type steam turbine, comprising:
 a housing provided at a first side thereof with a steam inlet tube and at a second side thereof with a steam outlet tube, the housing having a space formed therein; and   a turbine shaft provided to pass through the space of the housing, with a plurality of disk blades fitted over the turbine shaft,   wherein a guide blade assembly is coupled to the turbine shaft at a position between a duct of the steam inlet tube and the disk blades, the guide blade assembly guiding steam introduced through the steam inlet tube into the space of the housing toward the disk blades.   
     
     
         2 . The reaction-type steam turbine of  claim 1 , wherein the guide blade assembly is provided with a plurality of drag blades radially arranged along a circumference of the turbine shaft, and facing the steam introduced through the steam inlet tube. 
     
     
         3 . The reaction-type steam turbine of  claim 2 , wherein each of the drag blades of the guide blade assembly is formed such that an end of each drag blade is bent toward the steam inlet tube in a curved shape, such that the steam is guided to flow only toward the disk blades. 
     
     
         4 . The reaction-type steam turbine of  claim 1 , wherein the space of the housing includes:
 a turbine entrance directly connected to the duct of the steam inlet; and   turbine spaces defined at a side of the turbine entrance, with the disk blades installed in the respective turbine spaces, the turbine spaces being arranged such that the turbine shaft having the plurality of disk blades is placed perpendicular to the steam inlet tube, and   the guide blade assembly is coupled to the turbine shaft at a position where the turbine entrance is provided.   
     
     
         5 . The reaction-type steam turbine of  claim 2 , wherein the space of the housing includes:
 a turbine entrance directly connected to the duct of the steam inlet; and   turbine spaces defined at a side of the turbine entrance, with the disk blades installed in the respective turbine spaces, the turbine spaces being arranged such that the turbine shaft having the plurality of disk blades is placed perpendicular to the steam inlet tube, and   the guide blade assembly is coupled to the turbine shaft at a position where the turbine entrance is provided.   
     
     
         6 . The reaction-type steam turbine of  claim 3 , wherein the space of the housing includes:
 a turbine entrance directly connected to the duct of the steam inlet; and   turbine spaces defined at a side of the turbine entrance, with the disk blades installed in the respective turbine spaces, the turbine spaces being arranged such that the turbine shaft having the plurality of disk blades is placed perpendicular to the steam inlet tube, and   the guide blade assembly is coupled to the turbine shaft at a position where the turbine entrance is provided.