Several methods FAG import bearing fault diagnosis technology

FAG import bearings fault diagnosis technology are mainly vibration 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. A, the vibration diagnosis technology imported FAG bearing components surface fatigue spalling, indentation, or the local corrosion, FAG bearing import will appear in the operation of the periodic pulse signal. The periodic signal can be installed on the bearing seat of sensors ( Type speed or acceleration) To receive, and through the analysis of the vibration signal to diagnose the faults of bearing FAG import. Features: vibration diagnosis technology widely used; Can realize on-line monitoring; Diagnosis, diagnosis theory has been mature. Application: apply is especially suitable for imported FAG bearing fault in rotating machinery monitoring. , iron spectrum diagnosis technology FAG 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, on the basis of judging FAG import bearing working condition. Characteristic: the machine without disintegration; Low investment and good effect; Can find FAG bearing import earlier fatigue failure; Can do wear mechanism research. Application range: applicable to use of lubricating oil imported FAG bearing fault diagnosis, with grease lubrication FAG bearing import more difficult. Three, diagnosis technology lubricating oil film resistance good imported FAG bearing, due to the effect of oil film, there is a lot of resistance between inner and outer ring. So by measuring the resistance of the FAG import bearing inner and outer ring, can be imported FAG 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. Four monitoring and diagnosis technology, optical fiber monitoring is a kind of direct import from FAG bearing ring surface to extract the signal diagnosis technology. Made of optical fiber bundle displacement sensor consists of transmitting fiber bundle and receiving optical fiber bundle. Light fiber bundle sensors end face and the launch FAG import clearance reflected on the surface of the bearing ring, by the receiving fiber bundle, converted into electric signal by photoelectric component, through the analysis of the electrical signal processing, can be made to the imported FAG bearing condition assessment. Features: high sensitivity optical fiber displacement sensor; Directly import from FAG bearing surface to extract the signal, to improve the signal-to-noise ratio; Can directly reflect the manufacturing quality of rolling bearing, the surface abrasion degree, load, lubrication and clearance. Application range: applicable to the sensor can be installed inside a FAG bearing import machine. Five, if temperature diagnosis technology FAG bearings imported produce some exceptions, FAG import bearing temperature changes. Thus, according to the change of temperature, can be imported FAG bearing fault diagnosis, but to the anomaly judgment ability is very low. Features: simple diagnosis; Imported FAG bearing burn judgment effect is better. Application range: applicable to the machine imported FAG bearing simple routine diagnosis. Six, acoustic emission diagnosis technology of metal materials due to internal lattice dislocation and grain boundary sliding or due to the occurrence and development of internal crack, all need to release the elastic wave, this phenomenon is called acoustic emission phenomenon. Rolling bearing produces peeling or crack, can produce different types of acoustic emission signal, therefore can be made to the imported FAG bearing condition assessment. Features: diagnosis of quick, easy; Can online monitoring. Application: in recent years the development of new technology, less used in imported FAG bearing condition monitoring.