Rolling road sound source is due to ring the inherent vibration after the load. Due to the rings and rolling elements of nonlinear vibration of elastic contact form system. When lubricating or when machining accuracy is not high stimulation and the inherent vibration of elastic features, passing into the air becomes noise. It is well known that even the most skilled manufacturing uses contemporary technology of bearing parts, its surface will always exist with varying degrees of tiny geometric errors, so that between the raceways and rolling elements produce micro-wave excited vibration inherent vibration.
1. the diagnosis of oil-film resistor technology
Features: different working conditions you can use the same judging criteria. On surface spalling, differential diagnosis of abnormal effects such as indentation, crack.
Application scope: applies to Rotary shaft exposed locations.
2. vibration diagnosis technology
Features: vibration diagnostic technique widely used; can realize on-line monitoring diagnosis faster, diagnosis theories have matured.
Range of application: FAG bearings particularly suitable for rotating machinery fault monitoring.
3. technology of ferrographic diagnosis
Features: dissolution of the machines do not have to; low investment, the effect is good; to discover early fatigue failure of bearing; to do research on wear mechanism.
Range of application: applied to fault diagnosis of bearings are lubricated by lubricating oil, bearing more difficult for grease lubrication.
4. temperature diagnosis technique
Feature: diagnosing simple; judgment of FAG bearings burn better.
Application scope: applies to simple routine diagnostic machine bearings.
5. optical fiber monitoring and diagnosis technology
Features: fiber optic displacement sensor with high sensitivity; directly extracted from the fag bearing surface signaling, improves signal-to-noise ratio; could directly reflect the level of manufacturing quality, surface of the bearing wear, load, lubrication, and gap.
Application scope: applies to sensor can be installed in housings of machines.
6. acoustic emission diagnosis technology
Features: diagnostic fast, easy online monitoring.
Application scope: new technologies developed in recent years, during periods of low bearing condition monitoring application.
In order to ensure that FAG bearings after installation of raceways and small deformation, interference interference fit cannot be made too large, and thermal expansion of high speed centrifugal force and under high temperature, or offset normal to the mating surfaces of the pressure. Or relax the mating surfaces, interference must therefore take into account the above two factors of these rules carefully calculated, at room temperature under normal speed effective interference for the FAG bearings may not be valid.
If the calculation result that contradiction too large (only in Super FAG is often the case), take the ring of lubrication with static pressure lubrication method of dual lubricating measures, while the value of such programmes has the potential to make bearings DMN break 3 million mark.
Under high temperatures, thermal expansion, or offset normal to the mating surfaces of the pressure. Or relax the mating surfaces, interference must therefore take into account the above two factors of these rules carefully calculated, at room temperature under normal speed effective interference for the FAG bearings may not be valid.
If the calculation result that contradiction too large (only in Super FAG is often the case), take the ring of lubrication with static pressure lubrication method of dual lubricating measures, which have the potential to DMN value of FAG bearings break 3 million mark.
In considering the fag bearing clearance must not only take into account the various factors mentioned above, and taking into account the effect of the thermal elongation of the shaft on clearance, request bearing in working condition, that is, operating temperature, in the best clearance, and this clearance, the outer ball Groove Center, is exact on the formation of the State. Because of FAG bearings to reduce the relative sliding and internal friction, it is best not to adopt the method of inner and outer rings to the relative displacement along an axis to adjust the clearance of the ball bearing.
In collaboration with the bearing when the interference and clearance, to note that the material has become loose and deformation characteristics in high temperature, as well as several times from room temperature to high temperature and temperature changes in a certain possibility of permanent deformation.

 


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