CPC F04D 17/122 (2013.01) [F04D 29/083 (2013.01); F04D 29/102 (2013.01); F04D 29/266 (2013.01); F04D 29/286 (2013.01); F05D 2240/55 (2013.01); F05D 2260/31 (2013.01); F05D 2260/36 (2013.01)] | 14 Claims |
1. A rotor structure for a compressor, the rotor structure comprising:
a tie bolt and two rotor shafts extending along a rotor axis, the two rotor shafts respectively affixed to the tie bolt;
a plurality of impeller bodies disposed between the two rotor shafts, the plurality of impeller bodies supported by the tie bolt;
a plurality of hirth couplings arranged to mechanically couple the plurality of impeller bodies to one another along the rotor axis;
a respective sealing sleeve affixed onto respective radially outward surfaces of any two adjoining impeller bodies of the plurality of impeller bodies, the respective sealing sleeve arranged to span a circumferentially extending junction between the two adjoining impeller bodies to inhibit passage onto the respective hirth coupling of process fluid being processed by the compressor,
wherein the sealing sleeve is affixed to a respective one of the two adjoining impeller bodies by way of an interference fit,
wherein the sealing sleeve is affixed to the other one of the two adjoining impeller bodies by way of a slip fit; and
a circumferentially-extending groove in a first of the radially outward surfaces, and a seal member positioned in the groove to form a seal between the first of the radially outward surfaces and the sealing sleeve.
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