Raceway sound is due to deep groove ball bearing rolling elements rotate in the raceway and rolling out a smooth and continuous excitation noise, or tone only if its sound pressure level when aroused great attention. In fact, inspired by the sound of roller acoustic energy is limited, as in normal circumstances, high-quality sound for the 6203 roller bearing 25 ~ 27dB. This noise is to load single row deep groove radial ball bearings for the most typical, it has the following characteristics:
a. noise, vibration is random;
b. vibration frequency at 1kHz or more;
c. Whether the changes in speed, noise, sound pressure level of the main frequency is almost constant and increases with the speed increase;
d. When the radial clearance increases, the sound pressure level increased dramatically;
e. bearing rigidity increases, the total sound pressure level is lower, even if the speed increases, the total sound pressure level has also increased little;
f. lubricant viscosity, the higher the sound pressure level is lower, but for grease lubrication, the viscosity, the shape of soap fiber noise can affect the size of the value.
Raceway sound source is generated by the ring after load due to the inherent vibration. As the rings and rolling elements constitutes a non-linear elastic contact vibration system. When the lubricant or processing accuracy is not high and this will stimulate the inherent flexibility characteristics of the vibration, the air is passed to become noise. As we all know, even using the highest levels of modern manufacturing technology process deep groove ball bearing parts, the work surface there will always be varying degrees of small geometric errors, so that the raceway and rolling elements between the excited vibration systems produce small fluctuations in the natural vibration.
Despite the deep groove ball bearing raceway noise is inevitable, however, high-precision machining parts can be taken to the work surface, use the correct selection of bearings and precision bearings make noise damping.
