SHAFT & BEARING VIBRATION MONITORING
Description
The amplitude of the radial vibrations on the shaft and its radial position are the main indicators of the overall mechanical condition of rotating machines.
Many machine malfunctions can be detected, with these measurements: rotor unbalance, misalignment, bearing wear and friction. Some machine types produce vibrations that are not easily detected by measuring the relative dynamic movement of the shaft relative to the bearing.
Depending on the rigidity of the bearings, vibrations can be directly transmitted to the bearing housings. This can also occur with displacement amplitudes that are not detected by shaft measurement methods. In such cases, a piezoelectric accelerometer or a seismic velocimeter is used to measure the severity of the bearing vibrations.
Shaft and bearing vibration monitoring is specified in ISO-20816 and is applicable to all rotating machines, such as hydro turbines, gas turbines, steam turbines, pumps, fans, cooling towers, etc.
Typical faults detections
- Wear of roller bearings
- Misalignment
- Damages or wear of plain bearings
- Misc. tribological issues on plain bearings
Typical installation
2 proximity probes or absolute vibration sensors installed at 90° X/Y located in the radial direction.
Monitoring parameters
- MPS: Min gap
- CMS: Blades profile and polar view
LET'S KEEP IN TOUCH
Sign up to receive our newsletters