FAG flat needle roller bearing clearance maintenance performance characteristics - bearing knowledge

FAG bearing if there is no wrong choice can be used correctly, to a flat before the service life of the needle roller bearing, can be used for a long time, on the other hand, there are unexpected early damage, and yield to the early damage of use, as the reasons of early damage, not enough to use the consideration on the lubrication and, in turn, and foreign invasion, the error of the bearing assembly and axis deflection of big, not enough research on shaft and bearing box and so on, so to speak, these reasons the situation more overlap each other. In the use of a variety of mechanical design life and comparative study of various durable bearing limit, FAG bearing has to be decided at the same time. In choosing a FAG bearings, flat needle roller bearing is often inclined to think that grease life in aging, the fatigue life of oil, abrasion resistance, low noise, also need to fully research. When FAG bearing ring rotating load, such as using clearance fit, the installation is in the process of flat needle roller bearing of rotating the ring with the surface creep phenomenon will happen, easy generation micro wear and tear, at this point with surface will appear burns, cracks and other damage. Therefore, bearing slewing ring and mechanical parts of the load of the axis or hole with interference fit should be adopted. In the bearing parts of the machine, flat needle bearing should be in the radial, axial and circumferential ( Tangential) The positioning of the fixed three directions have different requirements. In general, FAG bearing axial fixation is using axial closed or part with radial tight fit, free side in institutions supporting bearings are often not be fixed in axial, to compensate for agency system in the axial dimensional change in the process of installation or heat bilges cold shrink. 1. Bearing is high precision, stable work, reliable. 2. Can run in high temperature, cryogenic and vacuum environment. 3. Complicated structure, which requires strict, has magnetic disturbance to the environment, but no other pollution. 4. Small friction, low power consumption, which can realize high-speed operation. 5. Dc excitation type bearing type can only be active ( Active) 。 6. Permanent magnet type bearing is only passive type (the Passive) Passive type bearing, and can't be stable in three directions, at least one direction should adopt active type. 7. Repulsion type magnetic bearing, because of the low utilization rate of magnetic force, structure of the suction type complex, rarely used. 8. Pure type electromagnet bearing is only five degree of freedom control type bearing, its size, quality and power consumption is larger.