INA oilless bearing load failure detection technology of load analysis

Contact fatigue failure refers to the bearing working surface under the role of alternating stress and failure. Contact fatigue spalling occurred in INA bearing working surface, often accompanied by fatigue crack, first of all, from the maximum cyclic shear stress under contact surface, and then extended to form a different flake shape, such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Refers to the relative sliding friction between the surface abrasion failure lead to constant wear and tear of the working surface of the metal and the failure. Continuous wear will cause bearing parts damaged gradually, and ultimately result in the loss bearing dimensional accuracy and other related issues. Wear may affect the shape change, the increase of fit clearance and working surface morphology change, may affect the lubricant or make its pollution to a certain degree of lubrication function is lost, so that no loss of oil bearing rotating accuracy and will not operate properly. Wear failure is one of the common failure modes of all kinds of imported bearings, according to the wear and tear is usually divided into one of the most common form of abrasive wear and adhesive wear. 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; Can be found without oil bearing early fatigue failure; Can do wear mechanism research. Application range: applicable to oil lubrication INA 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 bearing. 5. The characteristics of the monitoring and diagnosis technology: fiber optic displacement sensor sensitivity; Directly from the oilless bearing surface to extract the signal and improve the signal-to-noise ratio; Can directly reflect the INA 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, less used in bearing condition monitoring. Directly take oilless bearing, with the hand to wash hands fully the sweat, and again after coated with high quality mineral oils, especially in the rainy season and summer to pay attention to rust. In some special operating conditions, INA bearings can get more than the life of the traditional computing, especially in the case of light load. These special operating conditions is, when the rolling surface ( Track and rolling piece) Can be separated by a lubricating oil film effectively and the surface of the limit of pollutants may cause damage. In fact, the ideal condition, the so-called permanent bearing life is probably not allowed powerful punch, are not allowed to use hammer percussion bearing directly, not allowed by transfer roller pressure. INA 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 when removing oilless bearing, please keep close attention and observation on the surface of the raceway.