INA bearing joints appear all sorts of abnormal sound detection technology analysis - bearing knowledge

Sound the features causes. Zha - Zha, gaga sample not changes over turning speed ( Dust/foreign material) , sound changes over turning speed, Scratch) Dust/foreign material, orbital plane, ball bearings, roller surface coarse, orbital plane, ball bearing, roller surface scratch, yi orbital plane of small small-sized bearing, ball bearings, roller surface coarse. Yi! - Introduction on and off, and the rules of the occurrence and seal department contact contact with the retainer and sealing cover. Whoops di di roar rings by turning speed changes, size are changed. According to the specific speed rotary sound bigger. Sometimes this is approximate alarm or flute. Resonance, cooperate with bad ( Shaft poor shape) 。 Orbital plane deformation of rail surface, ball bearing, roller corrugated ( Large joint bearing such as mild tone on the word, it's normal) 。 I feel when I'm crunching manual rotation orbit scratch ( The rules) 。 Ball bearings, roller scratch ( Irregular) 。 Dust/foreign material, orbital plane deformation ( Department clearance is negative) 。 Rumbling flush large INA bearing high speed continuous tone. Orbital plane of small small-sized bearing, ball bearings, roller surface scratches. Blare - Om - When the detection power resting moment motor electromagnetic sound. Irregular cheep! Cheep! ( Non rotational speed changes) , mainly for small bearings with dust/foreign material. Jingle ring bearing rules and high speed continuous tone. Such as large bearing small bearing retainer clear sound is as normal. Such as at low temperature grease by discomfort - gentle is good. Because of retainer internal wear, lubrication, INA bearing load of work. Hey! Hua when low speed at high speed is more significant in the impact of the retainer internal, and insufficient lubrication. Reduce internal clearance or different tones disappear after preloading. So all the words of roller, roller, the impact between the sound. Raceway acoustic source lies in the inherent vibration caused by ring after exposure to the load. Because of the ring and rolling body elastic contact nonlinear vibration system. When lubrication or the machining accuracy is not high will stimulate the related to the elastic characteristics of natural vibration and passed to the was noise in the air. As is known to all, even if is to use the contemporary the most advanced manufacturing technology and processing joint bearing parts, there will always be the working surface of varying degrees of tiny geometric error, thus make the raceway and rolling body produces slight fluctuations inherent vibration excitation vibration system. 1. Oil film resistance diagnosis technical 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. 2. Vibration diagnosis technology features: vibration diagnosis technology widely used; Can realize on-line monitoring; Diagnosis, diagnosis theory has been mature. Application: apply is especially suitable for INA bearings in rotating machinery fault monitoring. 3. Ferrographic diagnosis technical features: the machine without disintegration; Low investment and good effect; Joint 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. 4. Temperature diagnosis technical features: simple diagnosis; For bearing burn judgment effect is better. Application range: applicable to the machine simple routine diagnosis of joint bearing. 5. The characteristics of the monitoring and diagnosis technology: fiber optic displacement sensor sensitivity; Surface to extract the signal directly from the INA bearing, to improve the signal-to-noise ratio; Can directly reflect the bearing manufacturing quality, the degree of surface wear, load, lubrication and clearance. Application range: applicable to the sensor can be installed on the bearing seat inside the machine. 6. Acoustic emission diagnosis technical features: diagnosis quick, easy; Can online monitoring. Application: in recent years the development of new technology, applied in the joint bearing condition monitoring is less. Despite the rolling bearing noise is unavoidable, but can take work surface precision machining parts, the correct selection of bearing and precise use of bearing noise vibration reduction. Joint bearing a rotation, inner ring and outer ring raceway surface, with rolling body is rolling contact, as the dark side, thus orbit trajectory are attached to the raceway surface does not belong to abnormal, which can be learned that load conditions, so at the time of removal of INA bearings, please keep close attention and observation on the surface of the raceway.