Ohjattava laakerijärjestelmä ja kone sisältäen saman laakerijärjestelmän

摘要

Abstract of the disclosure: A controllable bearing system for supporting a rotatable element comprises a bearing (102), spring equipment (105), and at least one electromagnet (106). The bearing is mechanically supported to be movable with respect to the rotatable element in the axial direction of the bearing. The spring equipment generates spring force for axially pressing the bearing so as to make the bearing system to support the rotatable element. The electromagnet is suitable for generating magnetic force directed against the spring force and keeping the bearing system detached from the rotatable element. Electrical current of the electromagnet determines whether the bearing system supports the rotatable element or is detached from the rotatable element. Thus, the bearing system is suitable for an auxiliary bearing that needs to be detached from the rotatable element during a normal operation and to support the rotatable element when main bearings, such as magnetic bearings, are non-operating.