Regular inspection of the bearing is a very important work to Of Imported maintain the bearing in good condition, which can also reflect the discovery of problems. Matters needing attention and relevant knowledge about bearing in use.
First of all, we want to emphasize that it is very important to keep the imported bearings lubricated and clean. Therefore, before we inspect the bearing, we should Of Imported first clean the surface of the bearing, and then disassemble the parts around the bearing.
It should be noted that the oil seal is a very fragile part, so you need to be extra careful during inspection and disassembly. Do not apply excessive force to avoid damage to the parts. Then carefully check the oil seal of the bearing and its surrounding parts.
If there are bad symptoms, be sure to replace it. The bad oil seal will lead to the damage of the bearing and the abnormal cloud shape of the bearing, resulting in the shutdown of the equipment.
Secondly, we have to check the lubricant of the bearing. Of Imported Lubrication is very important, not only for imported bearings, but also for all bearings. However, please note that the bearing should not add too much grease.
The inspection method of bearing lubricant is as follows:
Rub with a little lubricant between your fingers. If there are pollutants, you can feel them; Or apply a thin layer of lubricant on the back of Of Imported the hand, and then conduct light sealing inspection.
Then it’s time to change the lubricant of the bearing.
the imported bearing lubricated with engine oil should be filled with fresh engine oil and let the Of Imported machine rotate at low speed for a few minutes. Make the oil collect residual pollutants as much as possible, and then drain the oil. Attention:
filter the oil before use. When replacing the grease of the bearing lubricated with grease, the arbor used shall avoid connecting the angle of cotton to any part of the bearing. Because these residual fibers may wedge between rolling parts and cause damage, especially in the application of small bearings.
(1) Raceway sound of bearing and its control method
Raceway sound is a smooth and continuous sound made by the rolling body rolling on the raceway surface when the imported Of Imported bearing is running. It is a unique basic sound that will occur in all rolling bearings.
The general bearing sound is the sound of raceway plus other sounds. The raceway sound of ball bearing is irregular, and its frequency is above 1000Hz. Its main frequency does not change with the speed,
but its total sound pressure level increases with the speed. For the bearing with loud raceway sound, the sound pressure level of raceway sound decreases with the increase of viscosity; For bearings with low raceway noise, the sound pressure level changes from Of Imported decrease to increase
when the viscosity increases to more than 20mm2 / s. The greater the rigidity of the bearing pedestal, the lower the total sound pressure level of the raceway sound. If the radial clearance is too small, the total sound pressure level and dominant frequency of raceway sound will increase sharply with the decrease of radial clearance.
The methods to control the sound of raceway are: select low-noise imported bearings, that is, bearings with small waviness, and carefully select the service conditions. Raceway noise often affects the noise of the whole machinery. Reducing raceway noise can reduce the noise of the whole machinery.
(2) Impact sound of rolling element and its control method
When a larger type of ball bearing or cylindrical roller bearing operates at low speed under pure radial load, due to the small Of Imported centrifugal force of the rolling element, the rolling element in the non load area will impact the cage or raceway and make noise.
But as the speed increases, the sound will disappear. The control methods of impact sound of rolling elements are: appropriately reduce the radial clearance, and use the bearing of cage with reasonable structure and flexible material.
(3) Rolling sound of bearing and its control method
Rolling sound is the harsh metal friction sound that can occur in cylindrical roller bearings on all occasions. Most of it occurs in grease lubricated larger bearings, but it is more likely to occur in grease with degraded base oil performance, which hardly occurs in oil lubrication.
In addition, it is easy to occur in winter. When bearing pure radial load, it is easy to occur in the case of large radial clearance, and it is easy to occur in a specific speed range with different models and sizes, both continuously and intermittently. Special processing methods for the outer ring raceway can prevent the occurrence of rolling sound.
If necessary, this kind of bearing can be selected, or the radial clearance of imported bearing can be appropriately reduced, and the lubricating grease with excellent performance can be used to improve the rigidity of parts matching with the bearing.