method of producing a rotor component or a stator component

Abstract

A method of producing a rotor component or a stator component includes the steps of providing a disc-shaped element with a plurality of radially projecting and circumferentially spaced blades, an intermediate ring with an inner surface adapted for contacting tips of the blades, and an external ring with an inner surface adapted for contacting an outer surface of the intermediate ring, moving the intermediate ring co-axially in relation to the disc-shaped element to an operative position in which it is located radially outside the blades, and moving the external ring co-axially in relation to the intermediate ring to an operative position in which it is located radially outside the intermediate ring.

1 . A method of producing a rotor component or a stator component, comprising
 providing a disc-shaped element with a plurality of radially projecting and circumferentially spaced blades, an intermediate ring with an inner surface adapted for contacting tips of the blades, and an external ring with an inner surface adapted for contacting an outer surface of the intermediate ring,   moving the intermediate ring co-axially in relation to the disc-shaped element to an operative position, in which it is located radially outside the blades, and moving the external ring co-axially in relation to the intermediate ring to an operative position, in which it is located radially outside the intermediate ring.   
     
     
         2 . A method according to  claim 1 , wherein the external ring comprises a composite structure. 
     
     
         3 . A method according to  claim 2 , wherein the composite structure comprises a circumferentially wound fiber structure. 
     
     
         4 . A method according to  claim 3 , comprising moving the external ring in relation to the intermediate ring while the fiber structure is in a preloaded state. 
     
     
         5 . A method according to  claim 1 , comprising providing the external ring with an inner diameter substantially equal to an outer diameter of the intermediate ring. 
     
     
         6 . A method according to  claim 1 , comprising applying a pressure in an axial direction on the external ring in order to move it to the operative position. 
     
     
         7 . A method according to  claim 6 , comprising using a separate pressure application means for applying the pressure on the external ring. 
     
     
         8 . A method according to  claim 1 , wherein the intermediate ring comprises a metal material. 
     
     
         9 . A method according to  claim 1 , comprising providing the intermediate ring with excess material adapted for providing the intermediate ring with an increased rigidity during the movement, and moving the intermediate ring with the excess material in relation to the disc-shaped element to the operative position. 
     
     
         10 . A method according to  claim 9 , comprising providing the excess material with an external conical surface for interaction with the external ring during the relative movement. 
     
     
         11 . A method according to  claim 9 , comprising removing the excess material after having positioned the external ring radially outside the intermediate ring. 
     
     
         12 . A method according to  claim 9 , comprising removing the excess material after having positioned the intermediate ring in the operative position relative to the disc-shaped element. 
     
     
         13 . A method according to  claim 1 , comprising the sequential steps of first moving the intermediate ring co-axially in relation to the disc-shaped element to its operative position and then moving the external ring co-axially in relation to the intermediate ring to its operative position.