A bearing monitoring system for an air cycle machine includes a housing. Also included is a compressor disposed within the housing. Further included is a turbine disposed within the housing. Yet further included is an axial shaft operatively coupled to the compressor and the turbine, the axial shaft disposed within the housing and between a first plurality of bearings. Also included is a radial shaft extending from the axial shaft, the radial shaft disposed within the housing and between a second plurality of bearings. Further included is at least one sensor mounted to the housing and oriented to monitor deflection of the radial shaft.

A load cell for determining a radial force acting on a crankshaft includes a receiving sleeve for receiving a ring of a bearing; a fastening ring for attaching the load cell in a transmission housing; axial support areas provided on the fastening ring for axially supporting the ring of the bearing; and measuring regions for receiving radial forces of the receiving sleeve and which connect the receiving sleeve with the fastening ring, wherein strain sensors are attached to at least two of the measuring regions; and wherein the measuring regions comprise measuring lugs formed as angle brackets.

A load cell for determining a radial force acting on a crankshaft includes a receiving sleeve for receiving a ring of a bearing; a fastening ring for attaching the load cell in a transmission housing; axial support areas provided on the fastening ring for axially supporting the ring of the bearing; and measuring regions for receiving radial forces of the receiving sleeve and which connect the receiving sleeve with the fastening ring, wherein strain sensors are attached to at least two of the measuring regions; and wherein the measuring regions comprise measuring lugs formed as angle brackets.

Disclosed is a sensor roller for monitoring a lubrication condition of a roller bearing, the sensor roller providing a measuring unit for measuring at least a temperature, a speed change and a load of the roller, and a processing unit for generating a temperature profile, a speed change profile and a load profile of the roller based on the measured temperature and speed change.

Disclosed is a sensor roller for monitoring a lubrication condition of a roller bearing, the sensor roller providing a measuring unit for measuring at least a temperature, a speed change and a load of the roller, and a processing unit for generating a temperature profile, a speed change profile and a load profile of the roller based on the measured temperature and speed change.

A method of identifying at least one pole location on a bearing element formed from a metal source element. The method is non-destructive and does not alter the surface of the bearing element. The method includes applying X-rays to a plurality of regions of a bearing element, and measuring diffracted intensity values of X-ray diffraction vectors or bi-sectors at the plurality of regions. The method includes determining at least one pole location on the bearing element based on the diffracted intensity values.

A method of identifying at least one pole location on a bearing element formed from a metal source element. The method is non-destructive and does not alter the surface of the bearing element. The method includes applying X-rays to a plurality of regions of a bearing element, and measuring diffracted intensity values of X-ray diffraction vectors or bi-sectors at the plurality of regions. The method includes determining at least one pole location on the bearing element based on the diffracted intensity values.

Embodiments are directed to systems and methods for estimating wear in aircraft rotor systems. Data associated with loads and motions of a swashplate actuator is collected. The swashplate actuator drives a swashplate and at least one control link is coupled to the swashplate. The loads and motions of the at least one control link is estimated based upon the loads and motions of the swashplate actuator. Using a wear model, the current wear of control link components is estimated due to the loads and motions of the at least one control link. Wear estimates for the components are aggregated across multiple flights and used to determine when maintenance actions should occur.

Embodiments are directed to systems and methods for estimating wear in aircraft rotor systems. Data associated with loads and motions of a swashplate actuator is collected. The swashplate actuator drives a swashplate and at least one control link is coupled to the swashplate. The loads and motions of the at least one control link is estimated based upon the loads and motions of the swashplate actuator. Using a wear model, the current wear of control link components is estimated due to the loads and motions of the at least one control link. Wear estimates for the components are aggregated across multiple flights and used to determine when maintenance actions should occur.

A guide device includes: a metal component provided with a friction surface intended to receive a mating part in sliding frictional contact; and a detection sensing system of a wear of the friction surface or of a clearance between the friction surface and the mating part. The detection system includes one or more sensors; and a wireless communication system is connected to the detection system and configured to transmit information relating to wear or clearance out of the guide device.