Deep groove ball bearing vibration noise root causes

Deep groove ball bearing vibration and noise on the formation mechanism of domestic and international aspects of the control of vibration and noise, there are two different approaches. Bearing vibration mainly from two sources:
One bearing bearing caused by external incentives inherent vibration, referring to the bearing inner ring, outer ring, rolling elements and cage the natural vibration.
Two deep groove ball bearing due to contact between moving parts forced vibration caused by collision, such as ball rolling is not an ideal sphere, inside and outside the channel contact point trajectory is not a perfect circle (roundness, waviness), the raceway not the ideal smooth surface (roughness) and the rolling elements and cage in motion collision and lubricants in the forced vibration caused by impurities, vibration and sound are closely related, but slightly different sense, That is the sound originated in vibration, acoustic vibrations in the air is transmitted to humans by the feeling of hearing, so the ultra-high frequency vibrations are inaudible. However, if the receiver and the sound vibration characteristics of the receiver is the same, two received signals received relevant to the whole, according to this view, controlling vibration or noise control can play the same effect. And because the vibration control is simple, so home and abroad priority control vibration to ensure product quality. Therefore, for the general bearing, it is recommended to concentrate its limited human and financial resources to do a good job of bearing vibration control. Quality standards should not separate the noise, of course, according to foreign experience for a special bearing products, such as computer hard drives, CD recorder drive system bearings, vibration assessment is not easy to use, can develop criteria to assess noise measurement method .