The solution of bearing noise

The bearing will produce noise after being used for a period of time. Even the silent bearing is inevitable. What is the reason? This is an inevitable problem in the use of bearings. Years of bearing operation experience to share with you several ways to reduce noise

The raceway sound of the bearing and the method of controlling the raceway sound. The raceway sound is the sound produced by the rolling elements of the bearing rolling on the raceway when the bearing is running. The characteristic is slippery and continuous. This sound is all rolling bearings. The basic sound will be produced. For some bearings with particularly loud raceway sound, the sound pressure level of its raceway sound is inversely proportional to the viscosity range, that is, the greater the viscosity, the smaller the raceway sound; while for some bearings with low raceway sound, its raceway sound pressure level is inversely proportional to the The viscosity is proportional, that is, the greater the viscosity, the greater the sound pressure level. The change of raceway sound is also related to the rigidity of the bearing seat. The stiffness of the bearing seat is inversely proportional to the sound pressure level of the raceway sound. That is, the greater the stiffness of the bearing seat, the lower the total sound pressure level of the raceway sound. Also related is the radial clearance. The radial clearance and the sound pressure level and main frequency of the raceway sound are inversely proportional. The smaller the radial clearance, the greater the sound pressure level and main frequency.

The impact sound of the rolling elements and the control method The impact sound of the rolling elements is generated because the larger ball bearings or cylindrical roller bearings are in the non-load area due to the relatively small centrifugal force of the rolling elements when they are running at low speed under pure radial load. The rolling elements will impact the cage or raceway and cause noise. But this kind of sound will decrease with the increase of speed until it disappears. The control methods for this sound include: appropriately reducing the radial clearance, and using a bearing with a reasonable structure and a flexible cage.

The rolling sound produced by the bearing and its control method The rolling sound of the bearing is mainly produced in cylindrical roller bearings, and most of them occur in larger grease-lubricated bearings. This kind of sound may be produced in any occasion. It is: the harsh metal rubbing sound. This kind of sound is more likely to occur in grease with degraded base oil performance, but it is much less likely to occur during oil lubrication, or even not occur. If you want to reduce the occurrence of this situation, a special processing method can be adopted for the outer ring raceway, which can effectively prevent the occurrence of rolling noise. This kind of bearing can be used when necessary, or the radial clearance of the bearing can be appropriately reduced, the use of high-performance grease and the rigidity of the matching parts with the bearing can be very effective to make this happen. The probability is reduced.