A rolling bearing assembly includes an inner ring supported by a shaft or formed by a surface of the shaft, an outer ring supported in a housing or formed by a surface of the housing, a plurality of rolling elements disposed between the inner ring and the outer ring, and at least one distance sensor configured to measure a distance between the shaft and the housing in order to detect wear of the rolling bearing.

A device for monitoring the use of a machine component includes a sensor configured to measure at least one operating parameter of the machine component and produce a first output signal indicative of the measured operating parameter, a control unit configured to determine information about a use of the machine based on the received first output signal and to produce a second output signal indicative of the use of the machine, and a service unit configured to receive the second output signal and to permit a continuation of existing services for the machine component and/or to provide further services for the machine component based on the second output signal.

A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a compressor section, a combustor section, a turbine section, and at least one rotatable shaft. The engine further includes a seal assembly including a seal plate mounted for rotation with the rotatable shaft and a face seal in contact with the seal plate at a contact area. The seal assembly includes an abradable coating adjacent the contact area, and the abradable coating includes magnetic particles.

A gas turbine engine according to an exemplary aspect of this disclosure includes, among other things, a compressor section, a combustor section, a turbine section, and at least one rotatable shaft. The gas turbine engine further includes a seal assembly including a static structure and a rotatable structure configured to meet to form a contact area. The seal assembly includes an abradable coating on one of the static structure and the rotatable structure, and the seal assembly further includes a cutter on the other of the static structure and the rotatable structure.

A bearing configured to actively damp vibration of a shaft in a turbine. In one implementation, the bearing can include actuating members that move in a manner that changes properties of fluid, typically a thin film of lubricant, disposed in the bearing to facilitate rotation of the shaft. These changes effectively manipulate the stiffness and damping of the thin film according to a time periodicity that matches a parametric anti-resonance of the bearing. In turn, the resulting interaction of vibrating modes is favorable to damp vibration amplitudes at critical speeds.

A sensorized supporting device for bearings (1) comprises: • a bearing housing (2), configured for being secured to a mounting structure and defining at least one seat (2c) for a bearing (3); and • a sensorized supporting base (4), having a supporting body (4′) prearranged for being at least partially positioned between the mounting structure (S) and the bearing housing (2). The supporting body (4′) has a detection surface (4c) which extends in a longitudinal direction (L) and a transverse direction (W) and is configured for resting, directly or via interposition of at least one further element, on a corresponding surface of one of the bearing housing (2) and the mounting structure, the supporting base (4) being provided with a mechanical-stress sensor. The mechanical-stress sensor comprises at least one piezoelectric transducer (10.sub.1, 10.sub.2, 20) defining at least part of the detection surface (4c), the at least one piezoelectric transducer (10; 20; 10.sub.1, 10.sub.2) being configured for generating an electrical potential difference that is substantially proportional to the magnitude of a mechanical stress (SS) applied to the bearing housing (2).

A shaft monitoring system includes a rotatable shaft having a target element coupled thereto that rotates along with the shaft. A proximity sensor is located adjacent to the target element. The proximity sensor measures an inductance of the target element based on one or both of a volume of the target element and a distance between the target element and the proximity sensor, and generates a proximity sensor output signal based on the measured inductance. A signal processing system determines at least one of a position of the shaft, a rotational speed of the shaft, and a rotational direction of the shaft based on the proximity sensor output signal.

A method for mounting a sensor bearing unit providing a bearing and an impulse ring provided with a target holder and with a target mounted on an axial portion of the target holder. The method including measuring an eccentricity E.sub.1 between the target and the axial portion of the target holder, measuring an eccentricity E.sub.2 between a groove made in the bore of an inner ring of the bearing and the bore, introducing the target holder inside the groove, turning the target holder inside the groove to an angular position in which the eccentricity E.sub.total between the target and the bore of the inner ring is less than or equal to a predetermined value which is lower than the sum of the eccentricities E.sub.1 and E.sub.2, and securing the target holder inside the groove of the inner ring at the angular position.

A rolling bearing (1) has an outer ring (3) and an inner ring (2) that can rotate in relation to the outer ring (3). A sensor (8) is arranged on the outer ring (3) and a master ring (13) is arranged on the inner ring (2). The master ring (13) can be detected by the sensor (8). The master ring (13) has an electrically conductive section (15), and a contact element (10) fixed on the outer ring (3) bears against the electrically conductive section (15) of the master ring (13).

A rotationally compliant bearing roller assembly having a roller, at least one bearing member operably coupled to a base configured to support rotational movement about a rotational axis; and a rotary compliant joint interconnecting the at least one bearing member to the roller. The rotary compliant joint having a first compliance in a rotational direction about the rotational axis to permit movement of the roller in the rotational direction relative to the at least one bearing member, such that the first compliance being greater than a friction induced compliance of the at least one bearing member in the rotational direction. The compliant joint having a second compliance in a direction orthogonal to the rotational direction, such that the second compliance being less than the first compliance.