Wind turbine bearing monitoring (BT bearing)-with acoustic emission technology

Wind turbine bearing monitoring (BT bearing) - QingCheng AE Institute
BT bearings are double-row tapered roller bearings. They have a double-race outer ring and two inner rings. There is a spacer between the two inner rings. The bearing clearance can be adjusted by changing the thickness of the spacer. This type of bearing can bear both radial loads and axial loads in both directions, and can limit the axial displacement of the shaft and the housing within the axial clearance of the bearing. It is mainly used to bear radial and axial combined loads dominated by radial loads. It has the characteristics of large load-bearing capacity and low limit speed.

Rotating Machinery Condition Monitoring System Using Acoustic Wave (Acoustic Emission)

The acquisition module is arranged on the relatively stationary inner ring of the bearing. If there is a pit, the rollers in the same row will produce impact (collision) every time they pass by. When the speed is constant, the acoustic emission signal should have a periodic pattern.

The data is uploaded to the cloud, and a certain algorithm is used to determine whether a fault or wear occurs, and an alarm message is pushed to the client.

The BT bearing is located between the rotating shaft and the fixed shaft, at the front end of the main shaft. The rear end of the acoustic emission sensor is connected to the main machine with a signal line, so it can only be arranged on the inner side of the fixed shaft, close to the BT bearing.

Structural diagram

Sensor and collector installation layout

P.S.

Rotating Machinery Condition Monitoring System Using Acoustic Wave (Acoustic Emission)