Robert Boschgmbh

Danfoss Commercial Compressors

Danfoss A/s

Danfoss Commercial Compressors S.a.

Stan Vandesteene

Patrice Bonnefoi

Yves Rosson

Clement Martignago

Jonathan Vlastuin

The centrifugal turbo-compressor () includes a hermetic casing (); a drive shaft () having a longitudinal axis and rotatably arranged within the hermetic casing (); a compression stage including an impeller () connected to the drive shaft (); a gas suction inlet (); and a gas flow path (P) fluidly connected to the gas suction inlet () and configured to supply the compression stage with a gas flow. The gas flow path (P) includes a relaxation chamber () at least partially surrounding the drive shaft (), the gas suction inlet () emerging substantially radially into the relaxation chamber (); and a plurality of inlet flow guide channels () fluidly connected to the relaxation chamber () and angularly distributed around the longitudinal axis of the drive shaft (), the inlet flow guide channels () extending radially towards the drive shaft () and being axially offset from the gas suction inlet () and the relaxation chamber ().

Centrifugal turbo-compressor having a gas flow path including a relaxation chamber

The bearing arrangement includes a one-piece gas bearing sleeve () configured to rotatably support the drive shaft () and made in molybdenum or in a molybdenum alloy, the one-piece gas bearing sleeve () including a radial bearing surface () configured to Surround the drive shaft ().

Bearing arrangement for a drive shaft of a turbo-machine, and a turbo-machine including such a bearing arrangement

The centrifugal turbo-compressor () includes a hermetic casing; a drive shaft (); a first and a second compression stage () configured to compress a refrigerant and respectively including a first and a second impeller () connected to the drive shaft () and being arranged in a back-to-back configuration; an interstage sealing device provided between the first and second impellers (). The hermetic casing includes a main casing portion () in which are arranged the first and second compression stages () and the inter-stage sealing device. The first and second compression stage () respectively includes a first and a second aerodynamic member () each having an annular disc shape and respectively facing front-sides () of the first and second impellers ().

Centrifugal turbo-compressor

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Lyons, France

Stan Vandesteene