(1) bearing raceway sound and its control method raceway sound when the bearing is running, the continuous sound of the rolling element raceway scroll issued a slippery, the unique sound of all rolling bearings will occur . 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. Control raceway sound: the selection of low-noise bearing waviness small bearings, carefully selected conditions of use. The raceways sound often affect the mechanical noise to reduce the raceways sound can reduce the noise of the machinery.
The impact sound and the control method of the rolling element (2) the larger models of ball bearings or cylindrical roller bearings in a purely radial load low speed operation, due to the centrifugal force of the rolling bodies is smaller, in the non-load area of ??the rolling body will impact cage 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.
(3) bearing the jarring sound and its control method jarring sound Cylindrical roller bearings the harsh metal friction sound may occur on all occasions, mostly in the larger models bearing grease lubrication in the base oil properties more susceptible to deterioration of the grease in almost no oil lubrication. In addition, in the winter are more prone to radial clearance occasions, when exposed to pure radial loads, prone, and different with the model size, likely to occur within a certain speed range, both occur consecutively will intermittently appear. Outer ring raceway special processing method can prevent jarring sound appear necessary choice of such bearings or appropriate to reduce the radial clearance of the bearing, use the excellent performance of the grease and increase the rigidity of the bearing match parts .
 



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