Improvements in multi-stage centrifugal compressors

F - Mech Eng,Light,Heat,Weapons – 04 – D

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F04D 17/12 (2006.01) F04D 25/06 (2006.01) F04D 27/02 (2006.01) F04D 29/58 (2006.01)

Patent

CA 2750662

The invention relates to an improved multi-stage centrifugal compressor (10) comprising at least four centrifugal compression stages (11,12,13,14), each including an impeller. The impellers of one pair of the stages (12,13) are mounted on a first shaft (23) coupled to a first high speed direct drive motor (16), and the impellers of another pair of the stages (11,14) are mounted on a second shaft (24) coupled to a second high speed direct drive motor (15). The speed of the first and second motors is controlled by at least one drive (25) such that the impellers are all driven at the same speed.

L'invention concerne un compresseur centrifuge multiétagé (10) amélioré, comprenant au moins quatre étages de compression centrifuge (11,12,13,14), chacun doté d'une roue. Les roues d'une paire d'étages (12,13) sont montées sur un premier arbre (23) accouplé à un premier moteur à entraînement direct à grande vitesse (16), tandis que les roues d'une autre paire d'étages (11,14) sont montées sur un second arbre (24) accouplé à un second moteur à entraînement direct à grande vitesse (15). La vitesse des premier et second moteurs est commandée par au moins un entraînement (25) de sorte que les roues soient toutes entraînées à la même vitesse.

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