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1. (WO2014191459) ROTATING MACHINE WITH AT LEAST ONE ACTIVE MAGNETIC BEARING AND SPACED AUXILIARY ROLLING BEARINGS

Pub. No.:    WO/2014/191459    International Application No.:    PCT/EP2014/061059
Publication Date: Fri Dec 05 00:59:59 CET 2014 International Filing Date: Thu May 29 01:59:59 CEST 2014
IPC: F04D 29/058
F04D 29/059
F16C 32/04
Applicants: NUOVO PIGNONE SRL
Inventors: FALOMI, Stefano
BIGI, Manuele
FIORAVANTI, Duccio
MEI, Luciano
Title: ROTATING MACHINE WITH AT LEAST ONE ACTIVE MAGNETIC BEARING AND SPACED AUXILIARY ROLLING BEARINGS
Abstract:
The rotating machine comprises a shaft (14), a casing (12), at least one main magnetic bearing connected to the shaft for rotatably supporting said shaft inside the casing, at least one first and one second auxiliary rolling bearings (20, 22) positioned between the shaft and the casing to support axial and radial loads, and first and second axial abutment means (44, 54) positioned on the shaft to transmit axial loads to inner rings of the rolling bearings. The machine further comprises a spacer (28) axially positioned between facing faces of the inner rings (20a, 22a) of said rolling bearings for the transmission of the axial loads between said inner rings, and at least a first axial retaining means (58) positioned on the casing and located axially between facing faces of the outer rings (20b, 22b) for the transmission of the axial loads between at least one of said outer rings and the casing.