Patent ID: 11959485
Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A rotor structure in a compressor, the rotor structure comprising:
a tie bolt and two rotor shafts respectively affixed to respective ends of the tie bolt;
a plurality of impeller bodies supported by the tie bolt; and
a plurality of hirth couplings to mechanically couple the plurality of impeller bodies to one another along a rotor axis,
wherein a first impeller body of the plurality of impeller bodies is arranged to provide a first stage of compression, and each subsequent impeller body provides a subsequent stage of compression,
wherein each respective impeller body defines a respective Di/D2 ratio,
wherein the Di/D2 ratio of at least one of the impeller bodies is different than the Di/D2 ratio of the remaining impeller bodies,
wherein, based on the different Di/D2 ratio, respective surfaces defined by an inlet of said at least one of the impeller bodies are located at a different distance relative to the rotor axis compared to location of respective surfaces defined by respective inlets of the remaining impeller bodies,
wherein Di is indicative of a respective inner diameter of a flow path into an inlet of a respective impeller body, and
wherein D2 is indicative of respective outer diameter of the respective impeller body.