Bearing cage damage degree, why keep frame can be broken?

Bearing in the work, more or less because the friction caused a certain degree of damage and wear, especially when high temperature operation even damage of bearing cage. Cage is part of the bearing structure, that is to say, cage damaged, bearing also cannot run normally, there are many reasons that cause bearing damaged, but we are in the process of using, when damage to the bearing cage must according to the situation to determine the damage of the bearing cage, so as to find the root cause, finally take the corresponding measures, and prevent damage to repeat. Bearing cage damage degree: bearing cage damage the first level: the bearing start malfunctioning infancy, when temperature is normal, normal noise and vibration velocity and total spectrum is normal, but the peak signs, total energy and spectrum reflect the beginning of the bearing fault. When the real bearing failure frequency in ultrasonic period of approximately 20 - 60 KHZ range. Bearing cage damage degree 2: normal temperature, noise increases slightly, the total vibration velocity increases slightly, vibration frequency change is not obvious, but the peak energy has a big increase, spectrum is also more prominent. At this time of the bearing fault frequency in about 500 hz - 2 KHZ range. Bearing cage damage degree 3: temperature is a little higher, but the ear heard the noise and vibration velocity has a large amount of increase, and the vibration velocity spectrum is clearly visible on the bearing fault frequency and its harmonics and sideband, the other on the vibration velocity spectrum noise significantly elevated horizon, rush total energy compared to the second stage become bigger, the spectrum is also more prominent. At this time of the bearing fault frequency in about 0 1 KHZ range. Suggest that late in the third stage to replace its bearing, so at this time should have appear to the naked eye can see the rolling bearing fault characteristics such as wear and tear. Bearing cage damage degree 4: temperature rise obviously, noise intensity change obviously, the total amount of vibration velocity and vibration displacement are increased, the vibration velocity spectrum on the bearing fault frequency began to disappear, broadband high frequency noise is more random horizon; Total peak energy increases rapidly, and some unstable changes may occur. Never let bearing in the fourth stage of fault development, otherwise will may be catastrophic damage. Damage to the bearing cage reasons: 1, the bearing lubrication oil or grease to kill, not timely to add ( Maintenance) , lubricating oil or grease with the wrong label. 2, the impact of the bearing load impact load intense vibrations occurring in the roller of a cage collision. 3, bearing the cleanliness of bearing in the bearing box sealing is not good, there is dust to enter, add friction to rolling element and cage, so that the damage of cage. 4, installation issues bearing installation is not correct, cage is damage when installed. More than 5, bearing creep phenomenon of creep refers to the ring sliding phenomenon, in under the condition of the mating surface interference is enough, because the sliding and make the load point to move around, produce relative axial ring or shell to circumferential direction location deviation phenomenon. 6, bearing cage abnormal load installation does not reach the designated position, slope, etc of the large amount of interference of the clearance is reduced, increasing friction heat production, the surface of the softening, abnormal early spalling, along with the expansion of peeling, flaking, foreign body into the cage pocket hole lead to keep running block and generate additional load, aggravated the wear and tear in the cage, the cycle of such deterioration, it may cause maintains a fracture. 7, bearing retainer material defects cracks, large pieces of different metal inclusions, porosity, bubble and riveting defects of nails, nail mat or half cage in combination with surface gap, riveting injury etc are likely to cause serious maintains a fracture. 8, bearing hard foreign invading foreign hard the intrusion of foreign bodies or other impurities things, exacerbating the cage of the wear and tear. According to above to solve a variety of reasons, the life of the bearing will be very long. Many bearing life to the cause of the damage is not bearing itself, but a lot of external environment, such as insufficient lubrication, dust to enter, installation error, heavy load, high temperature, coupling medium. 9, other causes such as the coupling not bearing the skew, uneven; Belt installation too tight; Environmental problems, and so on are likely to damage the bearing or cage. Optimize the use of cage, reduce the damage of bearing cage, we can be analyzed from two aspects: 1, the bearing itself under the premise of precision guarantee: a, welding of the welding process optimization, the argon arc welding technology, and adjust the welding depth, in the case of security pillar length and welding the most. B, thread end, use silk thread, must be absolutely tighten in place, and the use of special process to keep pillar with frame washer interference fit all the time. C, surface hardening treatment technology on pillar, surface rolling body and pillar lowest consumption. D, rolling body center hole, the aperture special processing, guarantee a lower roughness values. E, reasonably reduce the central hole roller and the mainstay of fit clearance, minimize for start-stop impact damage in cage. 2, a bearing applications, lifting, must guarantee of the uniform stress of hole for hoist, bore four or three segments. B, changing stress area is disassembled the same security hole for hoist of uniform stress, and any card resistance because of the deformation resistance card or a foreign body, must stop lifting removed, changed to press to remove. C, put clean back-up bearing must be carried out in accordance with the new bearing way of equipping placement after equipping standby, avoid maintains a long-term stress deformation.