(1) Scar sound and its control method

       If the rolling surface of the rolling bearing has cracks, indentations or corrosion, periodic vibration and noise like riveting rivets will occur. The period may be fixed, but most of them have a certain corresponding relationship with the speed. The scars will continue to occur on the channel. , The scars appear on the steel ball from time to time, and this noise varies with the installation and lubrication conditions.

       The control methods for this type of noise include: do not knock the bearing during installation, prevent the INA bearing from being installed obliquely when assembling the INA bearing and the shaft into the bearing housing; prevent the SKF bearing from rusting during storage and prevent shock and vibration during transportation; use viscosity High grease.

(2) Dust sound and its control method

      There are foreign objects such as dust in the rolling bearing, and non-periodic vibration and so-called dust noise will occur. The magnitude of the vibration and noise is variable, and may or may not.

      The control methods of dust and sound include: improve the cleaning method of SKF bearings, strictly clean the bearing, shaft, seat hole and matching parts before installation; remove foreign matter in the lubricant; improve the sealing of the bearing; avoid the use of impure materials or Plastic cage with foreign objects embedded.

(3) Noise caused by lubrication factors and countermeasures

       Incorrect selection of lubricant, insufficient lubricant or aging and hardening can cause vibration and noise in SKF bearings, and this noise has no certain rules. In this case, the only way to choose a suitable lubricant, adjust the amount of lubricant, extend the service life of the lubricant and reasonably determine the replacement cycle.
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1. SKF bearing raceway sound and its control method

The raceway sound is a slippery and continuous sound produced by the rolling elements rolling on the raceway surface when the bearing is running. It is a unique basic sound that occurs in all rolling bearings. The general SKF bearing sound is the raceway sound plus other sounds. The raceway sound of a ball bearing is irregular, the frequency is above 1000 Hz, its main frequency does not change with the speed, but its total sound pressure level increases with the speed of the speed. The sound pressure level of the SKF bearing with loud raceway sound decreases with the increase of viscosity; while the sound pressure level of the SKF bearing with low raceway sound decreases when the viscosity increases to about 20mm2/s or more. And it has increased. 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 and main frequency of the raceway sound will increase sharply as the radial clearance decreases. The methods to control the raceway sound are: select low-noise bearings, that is, SKF bearings with small waviness, and carefully choose the conditions of use. The noise of the raceway often affects the noise of the entire machine, reducing the noise of the raceway can reduce the noise of the entire machine.

2. Impact sound of rolling elements and its control method

When larger ball bearings or cylindrical roller bearings run at low speed under pure radial load, the rolling elements in the non-loaded area will impact the cage or raceway and cause noise due to the small centrifugal force of the rolling elements. But as the speed increases, this sound will disappear. The methods for controlling the impact sound of rolling elements include: appropriately reducing the radial clearance and using SKF bearings with a reasonable structure and a flexible cage.

3. Rolling noise of SKF bearing and its control method

Rolling noise is the harsh metal friction noise that may occur in cylindrical roller bearings in all occasions. Most of them occur in larger grease-lubricated SKF bearings, and are more likely to occur in grease with degraded base oil performance. It almost never happens. In addition, it is more likely to happen in winter. When bearing pure radial load, it is easy to happen in occasions with large radial clearance, and depending on the size of the model, it is easy to happen in a specific speed range, and it will happen continuously. It will appear intermittently again. The outer ring raceway adopts a special processing method to prevent the occurrence of rolling noise. If necessary, this SKF bearing can be selected, or the radial clearance of the bearing can be appropriately reduced, the use of high-performance grease and the improvement of the matching parts of the bearing rigidity.