Gas turbomachinery generator

Abstract

A gas turbomachinery electricity generation apparatus includes a gas turbomachinery arrangement having an associated rotary drive take-off, an electricity generating arrangement which includes a first generator stage including a first generator rotor and generator stator arrangement; a second generator stage including a second generator rotor and generator stator arrangement, at least of the first and second generator stage rotors is driven by the rotary drive take-off.

1 . (canceled)  
   
   
       2 . A rotor of an electric generator or motor, the rotor including an airway extending generally in the direction of the rotor axis permitting cooling air or other gas to be drawn along the rotor.  
   
   
       3 . A rotor according to  claim 2 , wherein the airway extends adjacent the outer surface of the rotor.  
   
   
       4 . A rotor according to  claim 2 , wherein the airway has an inlet portion proximate an end of the rotor.  
   
   
       5 . A rotor according to  claim 2 , wherein a shroud portion overhangs the end of the rotor, defining an air gap between the rotor end and the shroud.  
   
   
       6 . A rotor according to  claim 5 , wherein the shroud portion overhangs the airway inlet.  
   
   
       7 . A rotor according to  claim 2 , further comprising an airway outlet to permit the cooling air to vent from the rotor at a position spaced longitudinally from the inlet.  
   
   
       8 . A rotor according to  claim 2 , wherein the rotor comprises a permanent magnet armature having one or more permanent magnets positioned at the radial periphery of a rotor body.  
   
   
       9 . A rotor according to  claim 8 , wherein the airway extends along the rotor intermediate the permanent magnet and a rotor body.  
   
   
       10 . A rotor according to  claim 8 , wherein a securing rim or annulus extends around the magnet armature.  
   
   
       11 . A rotor according to  claim 2 , wherein the magnet armature is seated in a seat formed on a rotor body.  
   
   
       12 . A rotor for an electric generator or motor comprising: 
 a rotor body having a rotor axis;    an airway extending along said rotor body generally in a direction of said rotor axis, said rotor body having an air inlet and an air outlet to permit cooling air or other gas to be drawn along said rotor body.