초록 ▼

A compressor unit for underwater operation is provided. The compressor unit includes a compressor having a compressor rotor and a plurality of compressor stages. The compressor unit also includes an electric motor having a stator, a motor rotor, and a gastight housing which is provided with an inlet

A compressor unit for underwater operation is provided. The compressor unit includes a compressor having a compressor rotor and a plurality of compressor stages. The compressor unit also includes an electric motor having a stator, a motor rotor, and a gastight housing which is provided with an inlet and an outlet. The motor rotor has two radial bearings, namely a first radial bearing and a second radial bearing, each arranged at the ends of the motor rotor. The compressor rotor has two radial bearings, namely a third radial bearing and a fourth radial bearing, each arranged at the ends of the compressor rotor. A coupling which transmits torque is arranged between the two rotors. The above arrangement provides a remedy for vibrations for especially large compressor units.

대표청구항 ▼

1. A compressor unit for underwater operation, comprising: a compressor comprising a compressor rotor and a plurality of compressor stages;an electric motor comprising a stator a motor rotor and a gastight casing with an inlet and an outlet, wherein the motor rotor comprises a first radial bearing a

1. A compressor unit for underwater operation, comprising: a compressor comprising a compressor rotor and a plurality of compressor stages;an electric motor comprising a stator a motor rotor and a gastight casing with an inlet and an outlet, wherein the motor rotor comprises a first radial bearing and a second radial bearing, wherein each of the first and second radial bearings is arranged at the ends of the motor rotor,the compressor rotor comprises a third radial bearing and a fourth radial bearing, each of the third and fourth radial bearings being arranged at an end of the compressor rotor,a torque transmitting coupling arranged between the compressor rotor and the motor rotor that connects the compressor and motor rotors to form a common rotor which extends in the vertical direction,wherein the compressor is designed such that, during operation of the compressor at a nominal rating of the compressor, a pressure difference is established over each of the compressor stages, and wherein, as a result of the pressure differences over the plurality of compressor stages, a thrust ensues, andwherein the ensuing thrust corresponds essentially to a weight force of the common rotor, and the orientation of the thrust is selected such that the thrust compensates for a weight force of the common rotor. 2. The compressor unit as claimed in claim 1, wherein the coupling is a flexible coupling. 3. The compressor unit as claimed in claim 2, wherein the radial bearings are electromagnetic bearings. 4. The compressor unit as claimed in claim 3, wherein at least one thrust bearing is provided on one of the two rotors. 5. The compressor unit as claimed in claim 4, wherein the coupling is a slender and twistable shaft arranged between the two rotors. 6. The compressor unit as claimed in claim 5, wherein the coupling is a quill-shaft. 7. The compressor unit as claimed in claim 6, wherein only one thrust bearing is provided. 8. The compressor unit as claimed in claim 1, wherein, for a vertical arrangement, the motor rotor is arranged vertically above the compressor rotor. 9. The compressor unit as claimed in claim 8, the thrust bearing is arranged in an upper region of the motor rotor. 10. The compressor unit as claimed in claim 9, wherein the motor rotor is formed in a stacked lamination type construction. 11. The compressor unit as claimed in claim 10, wherein the motor rotor is formed via a through-going type construction and with conductor elements inserted in recesses that extend in the longitudinal direction. 12. The compressor unit as claimed in claim 11, wherein the radial bearings and thrust bearing are encapsulated.