CPC F04D 17/122 (2013.01) [F01D 5/022 (2013.01); F01D 5/066 (2013.01); F01D 11/005 (2013.01); F04D 29/054 (2013.01); F04D 29/083 (2013.01); F04D 29/286 (2013.01)] | 18 Claims |
1. A compressor rotor comprising:
a tie bolt that extends along a rotor axis;
a first rotor shaft coupled to the tie bolt;
a second rotor shaft coupled to the tie bolt;
a first impeller body disposed between the first rotor shaft and the second rotor shaft, the first impeller body including a frustoconical outer surface having a first angle with respect to the rotor axis;
a second impeller body disposed between the first rotor shaft and the second rotor shaft;
a hirth coupling positioned to couple the first impeller body and the second impeller body for rotation about the rotor axis; and
a seal element having a first end coupled to the second impeller body and a second end that defines a frustoconical inner surface having a second angle that is changeable with respect to the rotor axis, the seal element movable between a first position in which the first angle of the frustoconical outer surface and the second angle of the frustoconical inner surface permit said frustoconical surfaces to contact one another at a point, and a second position in which the first angle of the frustoconical outer surface and the second angle of the frustoconical inner surface permit said surfaces to make surface-to-surface engagement.
|