Several methods of the essence of the imported bearing noise

Imported bearing raceway groove sound sound and its control method is when bearing is running, rolling on the surface of the raceway of the rolling element and a line of continuous sound, is unique to occur in all rolling bearings of the basic sound. General bearing ring raceway is combined with other sounds. Ball bearing raceway is irregular, frequency above 1000 hz, its main frequency does not change with speed, but its total sound pressure level increases with speed to speed up. Raceway large bearings, the rolling sound of sound pressure level decrease with the increase of the viscosity; The raceway small bearings, the sound pressure level in the viscosity increases to about 20 was/s above, from decreased to increase somewhat. And the rigidity of the bearing, the greater the raceway of the lower the total sound pressure level. Such as radial clearance is too small, the total sound pressure level and race master frequency will increase sharply with the decrease of radial clearance. Control of raceway acoustic methods are: using low noise bearing is bearing waviness is very small, that is, carefully select and use conditions. Race often affect the mechanical noise, reduce the raceway can reduce the mechanical noise. Impact of the rolling element and its control method for larger models of ball bearings or cylindrical roller bearings under pure radial load speed, due to centrifugal force is lesser, roller in the rolling body will impact the load area or race and making noises. But with the increase of rotational speed, the noise will disappear. Control method of rolling body impact sound: decrease the radial clearance, materials for use with reasonable structure and flexibility of the bearing cage. Imported bearings of rolling mill rolling mill and its control method is cylindrical roller bearing in the harsh metal can occur in all occasions, mostly happens in large type bearing grease lubrication, and in the base oil performance degradation occurred more often in grease, almost does not occur when oil lubrication. In addition, more easily occur during the winter, when under pure radial load, the radial clearance prone to big occasions, and with different size, easy to happen in a certain speed range, both continuous and intermittent. External ring raceway take special processing method can prevent the occurrence of roll ring, can choose this kind of bearing, if necessary or appropriate to reduce bearing radial clearance, the use of high performance grease and improve to suit the bearing parts of rigidity. 1, the bearing inner ring rely on the shoulder and interference of axial fixation, and simple structure, small outer profile size, suitable for both ends fixed supporting structure. 2, bearing inner ring by the shoulder and lock nut, axial fixation and axial structure size is small, affordable small two-way axial load. 3, inner ring by the shoulder and axial fixation lock nut. And a lock washer with locking, safe and reliable, suitable for high speed and overloaded. 4, imported bearing inner ring by the shoulder and shaft end ring axial fixation. Shaft end ring on the shaft end with screws. Set screw should be locking device. Should not be applicable to the shaft end cutting thread or space limit. 5, set set of inner hole of the radial dimension is compressed and clamped on the shaft, to realize the bearing inner ring axial fixation. 6, the withdrawal of clamping way and set the same. But withdrawal sets with special nut, imported bearing loading and unloading of convenient, suitable for radial load is bigger, smaller double row spherical bearing axial load on the optical axis is fixed.