Nuovo Pignone Tecnologie Srl

Nuovo Pignone Srl

Daniele Panara

Leonardo Baldassarre

Pierluigi Tozzi

Antonio Pelagotti

Michelangelo Bellacci

Alberto Guglielmo

Andrea Bernocchi

Marco Magnasco

Michele Fontana

Mirko Libraschi

Andrea Cianti

Valentina Pivetta

Stefano Franchi

Marco Raveggi

The bearing has a housing and a plurality of pads coupled with the housing. The pads form bearing surfaces facing a shaft receiving space. The pads are provided with cooling micro-channels formed therein, adapted to circulate lubrication fluid and improve heat removal.

Bearing with pads having cooling micro-channels therein, and method

A method for stabilizing transversal oscillations of a rotor including the steps of acquiring a first signal representing a value of transversal oscillations of a rotor; estimating a value of a thermal gradient from the first signal; computing a value of an actuation parameter from the value of thermal gradient; emitting an actuation signal representing the value of the actuation parameter.

Method for stabilizing transversal oscillations of a rotor

The method is used for uniforming temperature in a shaft supported by a fluid bearing during rotation of the shaft; a journal portion of the shaft is located inside the fluid bearing; at least one passage is provided inside the shaft at least along the journal portion so to cross it; at least one flow of heat-exchange fluid is established in the at least one passage; the method allows to overcome the problems due to the 'Morton effect'. A bearing system implementing the method is advantageously used in a turbomachine.

Method for uniforming temperature in a shaft supported by a fluid bearing, bearing system and turbomachine

The bearing system includes a fluid bearing, a shaft with a solid portion, and a bush located around the solid portion and in front of pad or pads of the fluid bearing; the bush includes a hollow portion and a plurality of supporting elements that fix the hollow portion of the bush to the solid portion of the shaft.

Bearing system with a rotary bush and turbomachine

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

Growing community of inventors

Florence, Italy

Daniele Panara