Technology mainly include the vibration diagnosis of rolling bearing fault diagnosis technology, iron spectrum diagnostic technology, temperature, acoustic diagnostic technology, the oil film resistor technology and optical fiber monitoring and diagnosis technology, etc., among them, the vibration diagnosis technology application, iron foundry, temperature is the most common.
1. The vibration diagnosis technology
Bearing components work surface fatigue spalling, indentation, or the local corrosion, bearing will appear in the operation of the periodic pulse signal.The periodic signal can be installed on the skf bearing distributor http://www.skf-bearings-lb.com/ seat sensor type (speed or acceleration) to receive, through the analysis of the vibration signal to diagnose the faults of the bearing.
Features: vibration diagnosis technology widely used;Can realize on-line monitoring;Diagnosis, diagnosis theory has been mature.
Application: apply is especially suitable for bearing in rotating machinery fault monitoring.
2. Ferrographic diagnosis technology
Bearing wear particles and their working conditions are closely linked.With wear particles in lubricating oil by a strong magnetic field, under the action of strong magnetic field, grinding grain on precipitation in iron spectrum according to certain rules, can be made on the ferrographic microscope ferrographic pieces in qualitative observation and quantitative instrument testing, judge the working condition of bearing.
Characteristic: the machine without disintegration;Low investment and good effect;Bearing can be discovered early fatigue failure;Can do wear mechanism research.
Application range: applicable to oil lubrication bearing fault diagnosis, with grease lubricated bearings is relatively difficult.
3. The oil film resistor diagnostic technique
Good lubrication of bearings, due to the effect of oil film, there is a lot of resistance between inner and outer ring.By measuring the resistance of the bearing inner and outer ring, bearing abnormal judgment.
Features: can use the same criteria for different working conditions.The surface spalling, indentation and crack the diagnosis of abnormal effect is poor.
Application range: applicable to the axis of rotation exposed.