Nuovo Pignone Srl

Nuovo Pignone Tecnologie Srl

Andrea Cianti

Leonardo Baldassarre

Emanuele Rizzo

Simone Amidei

Daniele Panara

Andrea Bernocchi

Michele Fontana

Alberto Armenzani

The shaft seal arrangement for a rotating turbomachine shaft having a rotation axis, comprises a rotor part and a stationary part. A dry gas seal is further provided, in combination with a cooling fluid volume arranged for receiving a cooling fluid and in heat exchange relationship with the dry gas seal. A venting arrangement collectively vents exhaust cooling fluid and dry sealing gas from the shaft seal arrangement.

Dry gas seal cooling arrangement and method

A method for operating a rotating machinery comprising a rotor, a rotor shaft, and at least one journal bearing supporting the rotor shaft is disclosed. The bearing comprises a bearing housing, a bearing surface in the bearing housing, a sleeve torsionally and axially fitted on the shaft, and a lubrication oil film filling a clearance between the outer surface of the sleeve and the bearing surface. The method comprises the step of modifying the clearance by modifying a radial dimension of the outer surface of the sleeve as a function of a rotation speed of the shaft.

Rotating machinery with adaptive bearing journals and methods of operating

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Florence, Italy

Andrea Cianti