Centrifugal compressor unit

摘要

One aspect of the invention provides a centrifugal compressor unit (1) comprising a first motor (3), at least one compressor (2) comprising a drive shaft (9) driven by the rotor (12) of the first motor (3) and a set of impellers (5, 6, 7, 8) mounted on the drive shaft (9). The first motor (3) and the compressor (2) are mounted in a gas-tight common housing (26) operated by the compressor unit (1). The rotor (12) of the first motor (3) and the drive shaft (9) are connected by a flexible coupling (24) placed in the housing (26). The compressor unit includes a second motor (4) that is placed in the housing and of which the rotor (13) is connected to the drive shaft (9) by a second flexible coupling (25).

主权项

1. A centrifugal compressor unit comprising:
a first motor; at least one compressor comprising a drive shaft supported by two radial bearings secured to a common gas-tight housing, and being driven by a rotor of the first motor, the rotor of the first motor being supported by two end radial bearings secured to the housing; and a set of impellers mounted on the drive shaft, wherein:
an assembly comprising the first motor and the compressor are mounted in the housing,the rotor of the first motor and the drive shaft are connected by a flexible coupling placed in the housing, andthe centrifugal compressor unit further comprises a second motor placed in the housing, the second motor comprising a rotor supported by two end radial bearings secured to the housing and connected to the drive shaft by a second flexible coupling, the drive shaft being driven via its two ends by the first and second motors, respectively.