Rotary machine, bearing and method for manufacturing a rotary machine

摘要

The invention concerns a rotary machine (1), comprising: a stator assembly (3) and a rotor assembly (4) centered on a central axis (X1); a magnetic bearing (5); and an auxiliary bearing (10) including a first ring (13) held in the stator assembly (3) and a second ring (14) delimiting a gap (G) radially to the central axis (X1) relative to the rotor (4). The second ring (14) is not rotating around the central axis (X1) in a primary operation mode and is dragged in rotation around the central axis (X1) in a secondary operation mode. The rotary machine (1) includes a monitoring system (50) for detecting a transition from the primary operation mode to the secondary operation mode. The monitoring system (50) comprises a target (60) formed on the second ring (14) and a sensor unit (70) fixed relative to the stator assembly (3). The invention also concerns a bearing and a method for manufacturing a rotary machine (1).