| 摘要 |
The invention relates to a safety bearing (10) for retaining a rotor shaft (2) of a machine (1), in particular of a turbine, wherein the safety bearing (10) has an outer ring (11) and an inner ring (12) arranged so as to be rotatable in relation to the outer ring (11), wherein rolling elements (13), in particular balls, are arranged between the outer ring (11) and the inner ring (12), wherein at least one sealing element (15) is provided on the side (14) of the inner ring (12) facing away from the outer ring (11). The invention further relates to a machine (1), in particular a turbine, comprising a rotor shaft (2), at least two magnetic bearings (20) for rotatably supporting the rotor shaft (2), and at least two safety bearings (10) for retaining the rotor shaft (2) if the magnetic bearings (20) cease to function, wherein at least one of the safety bearings (10) is designed so as to form a contactless seal between the safety bearing (10) and the rotor shaft (2). |
