Hybrid vibration damper with active magnetic vibrator

摘要

Hybrid vibration damper with active magnetic vibrator comprising: an armature (9) interposed between two viscoelastic structures (2a, 2b) of identical stiffness and damping coefficient, so as to form two damping studs in series between the framework of a rotating machine and the ground or a platform; at least three active magnetic bearing elements, a radial one (21) and an axial one (61) arranged, without contact, respectively facing a radial (15) and axial (18) ferromagnetic armature attached to a ring (12) securely fastened to the armature (9); at least three detectors which are radial or axial to the radial and axial position of the ring (12), respectively; at least one device (80) for detecting vibration, and slaving circuits for the set of radial and axial (21; 61) magnetic bearing elements so as to create omnidirectional reaction forces on the external cylindrical support body (11) of the bearing elements, which forces tend to oppose the vibration forces generated on the armature (9) by the rotating machine. IMAGE