FAG bearing failure in the process of operation of processing technology

Bearing surface form of fatigue failure is a failure, mainly for fatigue crack initiation, expansion and fracture process, under alternating load generated by the fault of the long-term effects of the metal. Sealed sliding bearing using the special test of high quality lithium grease lubrication. This grease can withstand the high temperature of 120 degrees for a short period of time. If a stable working temperature of 70 degrees or higher, the standard of lithium grease will shorten the service life. Always work under high temperature, special grease must be used, but also pay attention to whether need to use heat resistant materials as sealing device. The use of standard contact seal temperature cannot exceed 110 degrees. One, the bearing temperature is too high, when the agency is running to install turbo bearing parts allowed to have a certain temperature, when the hand touch body shell, should not feel hot as normal, whereas indicates sliding bearing temperature is too high. FAG bearing temperature are: the cause of lubricating oil quality does not conform to the requirements or metamorphism, lubricating oil viscosity is too high; The assemble tight ( Inadequate clearance) ; Turbo bearing assembly too tight; Bearing race in internal rotation shaft or housing; Too much load; Sliding bearing cage or rolling body fracture, etc. Two FAG bearings, bearing noise at work allows running noise slightly, if you have any abnormal noise or excessive noise or sound, suggests that the bearing failure. Sliding bearing causes of noise is more complex, one is the bearing inner and outer surface wear. As this kind of wear and tear, destroy the FAG bearing and shell, turbo bearing and shaft cooperate relationship, lead to axis deviation from the correct position, when axis at high speed movement produces sound. When the bearing fatigue, its surface metal flake, also can produce sound make bearing radial clearance increases. In addition, the sliding bearing lubrication, dry friction, and bearing broken etc all make abnormal noise. After bearing wear loose, loose cage damaged, also can produce sound bearing damage. Maintenance content including: monitoring operation status, supplement and replacement of lubricants, sealed, check regularly, it is to maintain the best conditions of mechanical operation of the corresponding operation standard, on a regular basis. As maintenance issues in the operation, has the sound, vibration, temperature, lubricant, sliding bearing separation type bearing, rolling body, the outer ring raceway surface can be respectively. Check the raceway surface, rolling surface, cooperate with the state, the abrasion of cage, the increase of turbocharged FAG bearing clearance and has nothing to do with dimension precision falling damage. Non separation of small ball bearings, with one hand will support level, the inner ring spinning confirm whether smooth outer ring. Regular bearing temperature measurement by using a thermometer, digital thermometer, for example, can accurate FAG bearing temperature measurement and display by ℃ or Fahrenheit units. Usually only a few microns or less than 1 mu m ( Some literature 20 microns) 。 Usually in the linear bearing is running after a round of or tens of millions of millions into peeling off. In most cases these into a period of flake type will not damage the general purpose, No special requirement) Bearing, and for high precision and high speed bearing, does not allow this into a period of peeling off. It is enough. More than 120 ℃ tempering occur will cause the bearing, the lower hardness and precision of the ring. Place the FAG bearings on the electric hot plate temperature of 100 ℃ for a few minutes, this method is most convenient, such as reverse it a few times can make the bearing heated evenly, and the efficiency is high, the size of bearing can use this method. If the far infrared light bulb, pay attention to the light bulb direction should be down, so as to avoid of infrared radiation is bad for the eyes. This bulb can be energy-saving pump. Bulb heating method is suitable for small and often do not need; To the sliding bearing heating, light bulbs still can make lighting at ordinary times, moreover does not need any other equipment.