| 摘要 |
The invention relates to a device for recentering a rotor shaft (1) in relation to the X axis of a staler structure (3) in the event of decoupling caused by excessive unbalance. Under normal operating conditions, the aforementioned shaft is coaxial with the X axis and is radially supported by a bearing bracket (5) which is disposed in a bore having axis X of the stator structure (3). Moreover, the bearing bracket (5) is provided with an outer diameter that is smaller than that of the bore, such that the bearing bracket can orbit around the X axis in the event of decoupling and, in addition, the bearing bracket is connected to the stator structure (3) by means of radially fusible elements (6), said | device comprising means of recentering the bearing bracket after decoupling. The invention is characterised in that the means of recentering the bearing bracket (5) comprise: means (10) of 7 moving the bearing bracket (5) in a precessional manner P in the opposite direction to the orbiting direction after decoupling, and numerous devices (20) for reducing the authorised travel of the bearing bracket (5) in relation to axis X, said travel-reducing devices being regularly distributed around the axes (X, 11) of the two parts formed by the stator structure (3) and the bearing bracket (5) and each comprising a first inclined surface (21) which is provided on one of the aforementioned two parts and a projection (22) which is provided on the other of said parts. Under normal operating conditions, the above-mentioned projection (22) is spaced radially from the first inclined surface (21) and can come into contact with the first inclined surface during the precessional movement P of the bearing bracket (5). |
