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INA powder metallurgy bearing trajectory check method - bearing knowledge

by:Waxing     2020-05-28
A rolling bearing, the inner ring and outer ring raceway surface, because contact with the moving body is move, as the dark side, thus orbit trajectory are attached to the raceway surface does not belong to abnormal, the change can be learned that load the premise, so in the case of remove the powder metallurgy bearings, please keep close attention to and observe the raceway surface running track. If watch running track, will know that only bear radial load, bear the axial load of big, inherit the torque load, or extreme rigid in bearing box is not equal. It can be said that these reasons the situation more overlap each other. So, want to use machine to fully understand the INA bearing, using the premise, on the basis of the structure of the bearing outer if can make clear before and after the accident, combined with powder metallurgy bearing damage and a variety of reasons, can prevent the similar accidents from happening again. If no wrong choice and can accurately use, to the bearing life before, but with a long period of time, in this case, the damage status to divest. , on the other hand, are also interested in outgoing early damage, and yield to the early damage of use, as the reasons of early damage, not enough to use and 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, etc. INA bearing fault feature late show to the severe fault ( For bearing damage, such as holding shaft commonly, burns, sand spallation, raceway, wear beads, etc. ) Most of time not more than a week, the bigger the equipment capacity, the faster the speed, the shorter the time interval. Therefore, in actual powder metallurgy bearing fault diagnosis, once found late fault characteristics, should be decisive judgment is bearing fault, arrange inspection as soon as possible. Cause noise of rolling bearings is more complex, one is the bearing inner and outer surface wear. Due to the wear and tear, damage to the bearings and shell, bearing and shaft cooperate relationship, lead to axis deviation from the correct position, when axis at high speed movement produces sound. When INA bearing fatigue, its surface metal flake, also can produce sound make bearing radial clearance increases. In addition, the bearing lubrication, forms the dry friction, and bearing broken etc all make abnormal noise. Bearing wear loose after kuang, maintains a looseness damage, also can produce sound. When institutions, installation of bearing parts allowed to have a certain temperature, when the hand touch body shell, should not feel hot as normal, conversely indicates that bearing temperature is too high. The cause of the high bearing temperature are: lubricating oil quality does not conform to the requirements or metamorphism, lubricating oil viscosity is too high; The assemble tight ( Inadequate clearance) ; Powder metallurgy bearing assembly too tight; Bearing race in internal rotation shaft or housing; Too much load; INA bearing cage or rolling body fracture, etc. Determined by bearing structure design parameters of stiffness, flexibility, quality, such as damping of vibration system under the condition of operation will produce that can meet the needs of its mechanical vibration.
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