The imported bearings support additional seals to effectively prevent intrusion of external foreign enemies, but this adds additional sealing mechanism, installs and repairs bearings and inconvenient axial dimensions, and shaft and housing seal performance matches delicate body parts and tolerances Impact. With a good sealed lubrication environment, but also sealed bearings solve the component matching problems, but also eliminates the need for complex lubrication systems. So compact, sealed key components, it is recommended to use sealed bearings. In addition to bearing in mind its own good dust seal, the sealing effect, but also did not provide bearing lubricants and good operating conditions during operation, reducing maintenance costs.
The imported bearing seals are divided into contact and non-contact seals according to their structure. A contact form can be divided into radial and axial seals. The seal structure can be divided into a single seal lip and a lip seal. Dust cover and rubber seals are two non-contact seals. Dust cover seal gap, only applicable to dust, rubber ring seal gap is very small, with a good sealing effect. Contact seal bearing rubber seals have only one very minor part. Rubber lip seals interfere with certain parts of the rotating bearing contact together, thus playing a good dust seal effect, but at lower speed limits and greater frictional torque.
When the imported bearing is in use, if it makes a loud noise, it means that the sliding friction between the metal makes sound. At this time, there is no harmful effect on the bearing, and it will not affect its normal operation. But when this voice is issued, we must check where we can stop the sound. First of all, when the radial clearance of the bearing is large, it is easy to produce a sound, and it is also likely to occur when a certain sharp rotation occurs. The second is that it is easy to appear in the winter, and there are often no rules.
1. Imported bearings are mixed with sand or carbon particles and other impurities. Acids or paints and other contaminants,
2. Mix the moisture in the imported bearings. Play a role in corrosion;
3. The clearance of the imported bearing is too small (not properly matched)
4. The type of lubricating oil or grease is not selected correctly; oil or grease leaks through the seal).
5. Lack of lubrication (The oil level is too low. Or the seat hole is not straight).
6. The imported bearing is clamped by the seat hole (the roundness of the seat hole is not good).
7. The horn of the bottom of the imported bearing housing is uneven (causing the deformation of the seat hole and even the crack of the imported bearing seat) dust particles.
8. There are debris in the bearing housing bore (residual chips).
