Home > Low Carbon > Causes of limit speed noise of deep groove ball bearing

Causes of limit speed noise of deep groove ball bearing

wallpapers Low Carbon 2021-05-08
The deep groove ball bearing is allowed to have slight running noise during operation. If the noise is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.
 
The causes of noise in deep groove ball bearings are complicated. One of them is the wear of the mating surfaces of the inner and outer rings. Because of this kind of wear, it destroys the matching relationship between bearing and shell, rolling bearing and shaft, causes the axis to deviate from the correct position, and produces abnormal noise when the shaft moves at high speed. When the fag bearing is fatigued, the metal spalling on its surface will also increase the bearing radial clearance and produce abnormal noise. In addition, the bearing lubrication is insufficient, the formation of dry friction, and bearing breakage will produce abnormal sound. Bearing wear loose, cage loose damage, will also produce abnormal sound.
 
The raceway sound of the bearing and its control method raceway sound is a kind of continuous and slippery sound produced by the moving body of the fag bearing moving on the raceway surface when the fag bearing is running. What are the sealing types of the bearing?. It's the most important sound in the city. General bearing sound is equal to raceway sound plus other sounds. The raceway sound of ball bearing is irregular, the frequency is more than 1000 Hz, its frequency does not change with the speed, but its partial sound pressure level increases with the speed. For the bearing with high raceway noise, the sound pressure level of raceway noise decreases with the increase of viscosity; However, the sound pressure level of fag bearing with low raceway noise changes from reduced to no increased when the viscosity increases to more than 20mm2 / s. The higher the rigidity of the bearing seat, the lower the partial sound pressure level of raceway sound. If the radial gap is too small, the partial sound pressure level and frequency of raceway will increase sharply with the decrease of radial gap. The way to control raceway noise is: choose low noise bearing, that is, bearing with small waviness, and carefully choose the premise of utilization. Raceway noise often affects the noise of zero machinery. Reducing raceway noise can reduce the noise of zero machinery.
 
The impact sound of moving projectile and its control method when the larger type of ball bearing or deep groove ball bearing is running at low speed under pure radial load, because the centrifugal force of moving projectile is small, the moving projectile in the non load area will impact the coupling frame or raceway and make noise. But with the advance of the speed, that kind of sound will disappear. There is no way to control the impact sound of moving projectile body: properly reduce the radial clearance, and use the bearing of connecting frame without reasonable layout and material harmony.
 
The rolling noise of fag bearing and its control method rolling noise is a kind of harsh metal friction noise that can occur everywhere. Most of it occurs outside the larger type of bearing lubricated by grease, but it is more difficult to occur outside the lubricating grease whose base oil function is deteriorated, and it hardly occurs when the bearing is lubricated by oil. In addition, it is more difficult to occur in winter. When it is under pure radial load, it is more difficult to occur in places with large radial clearance. Moreover, it is more difficult to occur in a specific speed range with the difference of model size, which will occur continuously and intermittently. Special processing method is adopted for outer ring raceway to prevent rolling noise. If necessary, which kind of bearing can be selected, or the radial clearance of bearing can be appropriately reduced, and the poor lubricating grease and rigidity of matching parts of forward bearing can be used.
You might interested in the relevant topics as follow:

Fault diagnosis and maintenance method for running vibration of deep groove ball bearing


Say something
  • All comments(0)
    No comment yet. Please say something!
Prev: No Page
Next: No Page