The rolling sound of bearings and its control method The rolling sound is when the bearing is running, its rolling body in the rolling surface and issued a slippery continuous sound, is all rolling bearings will occur in the unique basic sound. The general bearing sound that is the track sound plus other sounds. The ball bearing's rolling sound is irregular, the frequency is above 1000Hz, its main frequency does not change with the speed, but its total sound pressure level increases with the speed of speed. The sound pressure level of the sound of the raceway increases with the viscosity and decreases; the sound pressure level of the bearing with a small raceway increases to about 20mm2/s or more when the viscosity increases, which is reduced and increases. The greater the rigidity of the bearing seat, the lower the total sound pressure level of the raceway sound. If the radial clearance is too small, the total sound pressure level of the raceway sound and the main frequency will increase sharply with the reduction of the radial clearance. Control of the raceway sound methods are: the use of low-noise bearing that is very small ripple bearing, prudent selection of the use of conditions. Rolling sound often affects the entire mechanical noise, reduce the rolling sound can reduce the noise of the entire machinery.

The impact of the rolling body sound and its control methods Larger models of ball bearings or cylindrical roller bearings in pure radial load at low speed, due to the small centrifugal force of the rolling body, in the non-load area of the rolling body will impact the cage or raceway and issued noise. But with the increase of speed, this sound will disappear. Control methods for rolling body impact sound include: appropriate reduction of radial clearance, use of bearings with reasonable structure and material with flexible cage.

Bearing rolling sound and its control method Rolling sound is cylindrical roller bearing in all occasions may occur in the harsh metal friction sound, mostly occur in grease lubrication of the larger type bearing, and in the base oil performance degradation of grease is more likely to occur, in oil lubrication almost does not occur. In addition, in winter when more likely to occur, when bearing pure radial load, in the radial clearance is easy to occur, and with the model size of different, in a particular speed range is easy to occur, both will occur continuously and intermittently. The outer ring raceway to take special processing method can prevent the appearance of rolling sound, if necessary, can choose this bearing, or appropriate to reduce the bearing radial clearance, the use of good performance grease and improve and bearing with the rigidity of the machine parts.

1) standard (G) level tolerance bearings;

2)radial bearing only bear radial load thrust bearing only bear axial load;

3)=0.1C (C is the basic dynamic load rating of the bearing);

4)rigid bearing housing and shaft;

5)normal lubrication and cooling conditions.

When the bearing in 0.1C load conditions operation, due to rolling body and raceway contact surface between the contact stress increases, resulting in bearing working temperature, lubricant performance relative deterioration, therefore, the bearing limit speed will be reduced accordingly. For C/=10 range, due to the limit speed reduction is very small, so can not be considered, that is, according to f1 = 1 to take the value. For the joint load to the role of the radial bearing, because of its load bearing rolling body number increases, friction resistance, heat, lubrication and cooling conditions become worse, and the role of the force on the cage also increases, therefore, must be based on the type of bearing and the size of the load angle, the bearing limit speed multiplied by a reduction factor f2 to adjust.

If the selected bearing limit speed speed can not meet the requirements of use, can be used to improve some technical measures to improve, in order to achieve more satisfactory requirements. Such as improve the bearing tolerance level; appropriate to increase the clearance; change the use of special materials and improve the structure of the cage; change the way of lubrication, such as the use of oil and gas, oil mist and spray lubrication; improve the cooling conditions.