inspired raceway sound acoustic energy is limited

Raceway sound source is to be generated after the load caused by the natural vibration of the ring. Since the elastic rings and rolling contact with nonlinear vibration system constituted. When lubrication or machining accuracy is not high flexibility with this feature will be excited about the inherent vibration transmitted into the air then becomes noise. As we all know, even with the highest levels of modern manufacturing technology machining bearing parts, the work surface there will always be varying degrees of tiny geometric errors, so that between the raceway and rolling elements excite vibrations produce tiny fluctuations inherent in the system vibration.
    Although SKF bearing raceway noise is inevitable, however, precision machined parts can be taken to the work surface, use the correct selection of Slewing bearing and precision bearings make noise damping.
    Raceway sound is due to rotation of the bearing rolling elements and the raceway scroll inspire a kind of smooth and continuous noise, only when its sound pressure level or tone when aroused great attention. In fact, inspired raceway sound acoustic energy is limited, as in normal circumstances, high-quality sound of 6203 bearing raceway 25 ~ 27dB. This noise to withstand the radial load row deep groove ball bearings are the most typical, it has the following characteristics:
    a. noise, vibration is random;
    b. vibration frequencies above 1kHz;
    c. regardless of how the speed of change, the main frequency noise is almost constant with the speed and the sound pressure level is increased with the increase;