Reaction turbine

Abstract

A reaction turbine, according to the present invention, includes first and second rotor plates, which are coupled together to form an integrated rotor, and an inner flow path including a combination of first and second flow paths, which are formed on the surfaces of the first and second rotor plates that face each other, respectively, thereby enabling easier manufacturing into a form desired by a designer by eliminating the limitation of a cross-sectional shape of the inner flow path. In addition, a cross section of each of the first and second flow paths can be formed into a semicircular shape thus yielding a circular shape for the inner flow path, which is formed by combining the first and second flow paths, thereby effectively enhancing the performance of a turbine by minimizing pressure loss of a working fluid that passes through the inner flow path.

1 . A reaction turbine comprising:
 a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet;   a rotation shaft that passes through the housing and is rotatably coupled to the housing; and   a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor,   wherein the rotor comprises first and second rotor plates that are coupled to each other in the axial direction, and   first and second flow paths are formed on surfaces of the first and second rotor plates that face each other, respectively, and   a combination of the first and second flow paths constitutes an inner flow path on which the working fluid is guided.   
     
     
         2 . A reaction turbine comprising:
 a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet;   a rotation shaft that passes through the housing and is rotatably coupled to the housing; and   a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor,   wherein the rotor comprises first and second rotor plates that are coupled to each other in the axial direction, and   an inner flow path on which the working fluid is guided, is formed on a surface of the second rotor plate toward the first rotor plate, and   the first rotor plate is formed to cover an entire surface of the inner flow path.   
     
     
         3 . The reaction turbine of  claim 1 , wherein the first and second flow paths have cross sections that are symmetrical with respect to each other based on a surface on which the first and second rotor plates are coupled together. 
     
     
         4 . The reaction turbine of  claim 1 , wherein a cross section of each of the first and second flow paths is formed into a semicircular shape. 
     
     
         5 . The reaction turbine of  claim 1 , wherein a cross section of the inner flow path is formed into a circular shape. 
     
     
         6 . The reaction turbine of  claim 2 , wherein a cross section of the inner flow path is formed into a semicircular shape. 
     
     
         7 . The reaction turbine of  claim 1 , wherein the inner flow path is formed when the first and second rotor plates are manufactured using a casting method and is finished using a ball end mill. 
     
     
         8 . The reaction turbine of  claim 1 , further comprising a nozzle portion that extends from and is formed at a discharge side of the inner flow path and has a smaller cross-sectional area than that of the discharge side of the inner flow path. 
     
     
         9 . The reaction turbine of  claim 1 , wherein a plurality of rotors are stacked and disposed in a multi-stage manner along the axial direction within the housing flow path, and
 the working fluid injected from a rotor in a previous stage toward the outer circumference side of the rotor is introduced toward the center side of a rotor in a next stage through the housing flow path.   
     
     
         10 . The reaction turbine of  claim 1 , wherein at least a part of the inner flow path has an involute curve shape. 
     
     
         11 . The reaction turbine of  claim 10 , wherein a rotor introduction portion into which the working fluid is introduced in the axial direction and which sends the introduced working fluid to the inner flow path, is formed in a center of the rotor, and
 an outer circumferential surface of the rotor introduction portion and an outer circumferential surface of the inner flow path are connected to each other so as to constitute at least one arc shape.   
     
     
         12 . A reaction turbine comprising:
 a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet;   a rotation shaft that passes through the housing and is rotatably coupled to the housing; and   a rotor assembly that comprises a plurality of rotors, which are stacked and disposed in a multi-stage manner along an axial direction within the housing flow path that are integrally coupled to the rotation shaft, and that rotate the rotation shaft as the working fluid introduced from a center of each of the plurality of rotors in the axial direction is injected toward an outer circumference side of each rotor,   wherein the plurality of rotors are integrally formed when two rotor plates are coupled to each other in the axial direction, and first and second flow paths of which cross sections are symmetrical with respect to each other, are formed on surfaces of the rotor plates that face each other, and a combination of the first and second flow paths constitutes one inner flow path.   
     
     
         13 . The reaction turbine of  claim 2 , wherein the inner flow path is formed when the first and second rotor plates are manufactured using a casting method and is finished using a ball end mill. 
     
     
         14 . The reaction turbine of  claim 2 , further comprising a nozzle portion that extends from and is formed at a discharge side of the inner flow path and has a smaller cross-sectional area than that of the discharge side of the inner flow path. 
     
     
         15 . The reaction turbine of  claim 2 , wherein a plurality of rotors are stacked and disposed in a multi-stage manner along the axial direction within the housing flow path, and
 the working fluid injected from a rotor in a previous stage toward the outer circumference side of the rotor is introduced toward the center side of a rotor in a next stage through the housing flow path.   
     
     
         16 . The reaction turbine of  claim 2 , wherein at least a part of the inner flow path has an involute curve shape. 
     
     
         17 . The reaction turbine of  claim 16 , wherein a rotor introduction portion into which the working fluid is introduced in the axial direction and which sends the introduced working fluid to the inner flow path, is formed in a center of the rotor, and
 an outer circumferential surface of the rotor introduction portion and an outer circumferential surface of the inner flow path are connected to each other so as to constitute at least one arc shape.