Blade of a turbine

Abstract

The present invention relates to a blade of turbine having an aerofoil, a platform and a root portion configured to be slidingly received in mounting slots of a rotor disc. The blade further includes a locking member disposed on the root portion and engaged with the rotor disc to make axial fixation of the blade to the rotor disc. With the technical solution of the present invention, it provides a blade with simple and cost effective axial locking system to make axial fixation of the blade relative to the rotor disc, and also a fail-safe solution during assembly process.

1 . A blade of turbine, comprising an aerofoil, a platform, a root portion configured to be slidingly received in mounting slots of a rotor disc, and a locking member disposed on the root portion and engaged with the rotor disc to make axial fixation of the blade to the rotor disc. 
     
     
         2 . The blade of  claim 1 , wherein the locking member is a locking pin disposed between the root portion and the rotor disc, the locking pin comprising a first protrusion to engage with a first groove in the root portion and a second protrusion to engage with a second groove in the rotor disc. 
     
     
         3 . The blade of  claim 2 , wherein the first and second protrusion are arranged at one end of the locking pin to be received by the first and second groove respectively. 
     
     
         4 . The blade of  claim 2 , wherein the locking pin comprises a third protrusion at the other end thereof to abut on a component arranged next to the blade in the axial direction of the rotor. 
     
     
         5 . The blade of  claim 4 , wherein the component comprises a heat shield with an anti-rotation member to engage with the third protrusion of the locking pin. 
     
     
         6 . The blade of  claim 5 , wherein the anti-rotation member is sized and positioned so that the anti-rotation member is engaged with the third protrusion of the locking pin as the first and second protrusions of the locking pin are engaged with the first and second grooves respectively. 
     
     
         7 . The blade of  claim 1 , wherein the locking member is disposed at the both sides of the root portion. 
     
     
         8 . The blade of  claim 2 , wherein the locking pin is disposed at the both sides of the root portion.