About NSK bearings in the causes of noise limit speed

NSK bearings allow running noise slightly in the work, if you have any abnormal noise or excessive noise or sound, suggests that the bearing failure. NSK bearings causes of noise is more complex, one is the bearing inner and outer surface wear. Due to the wear and tear, damage and shell, rolling bearing and the bearing axis of cooperate relationship, lead to axis deviation from the correct position, when axis at high speed movement produces sound. When auto 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. Bearing raceway is rolling way voice and moderation when auto bearing operation, its move is raceway surface move and send out the voice of a class of gliding continued, what type of bearing seal? 。 Is no move by bearing the foundations of the cities, no sound. General is equal to the raceway bearing voice and other sound. Sound of ball bearing raceway is not law, frequency is above 1000 hz, it from the frequency does not change with the rotational speed, but its sound pressure level added along with the acceleration of speed. Raceway large bearings, the rolling sound of sound pressure level with the adding of viscosity reduction; And raceway small car bearing, its viscosity of sound pressure level is about 20 was delete to/s above from cuts to delete large. The rigidity of the bearing, the greater the raceway sound sound pressure level is lower. As the radial gap is too small, raceway of sound pressure level and from the frequency will be destroyed with the radial around gap cutting and adding sharply. Rolling way voice of moderation: choose low noise bearing is bearing waviness is very small, that is, carefully choose use premise. Race often zero mechanical noise, cutting groove can cut down the noise of zero machinery. Move body sound and abstemious way larger models of ball bearing or NSK bearings are pure radial load under low speed, centrifugal force due to move body is small, in the load zone move body will impact links or race and making noises. But with out the speed, the class will eliminate noise. Temperance way of moving body impact sound: appropriate cutting radial gap, use without reasonable layout and material of mild relate to the bearing frame. Auto bearing of rolling mill and its control way is the roll bearing is no place can happen by sharp metal friction sound when most needed is least heeded, mostly happens is larger models bearing grease lubrication, grease base oil degradation function are much harder, is hardly happen when the oil lubrication. In addition, is difficult to occur in winter, when under pure radial load, radial around gap is big places difficult to occur, and with the size differences, is a specific speed category difficult to occur, both continuous and intermittent flush. External ring raceway adopt special processing methods to prevent line on the roll, when need can choose the kind of bearing, or appropriate cut bearing radial clearance, using the function of the inferior show grease and the former enterprise bearing rigidity of matching parts.