The larger models of the impact sound and its control method of the rolling element bearings in a purely radial load low speed operation, due to the centrifugal force of the rolling bodies is smaller, in the non-load zone of the rolling bodies will impact the holder or raceway noise . As the speed increases, the sound will disappear.
The rolling impact sound control methods: appropriate to reduce the radial clearance, reasonable structure and supple cage bearing material.
Bearing raceway sound and its control method raceway sound when the operation of the bearing rolling element raceway scroll issued a slippery continuous sound, a unique sound all Rolling occurs. The general sound of the bearing raceway sound and other sound. The ball bearing raceway sound is irregular, the frequency of 1000Hz or more, its main frequency does not change with the speed, but the total sound pressure level increases with engine speed to accelerate. Roller Daosheng large bearing raceway sound SPL is reduced with the increase in viscosity; small bearing raceway sound, the level in the viscosity is increased to more than about 20mm2 / s, by reducing transfer is somewhat increased. The greater the rigidity of the bearing raceway sound overall sound pressure level is lower. Such as the radial clearance is too small, the total sound pressure level and the main raceway sound frequency will be increased dramatically with the reduction of the radial clearance.


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