Rolling bearings are equipped with cor responding seals at both ends. With a dust cover and with a seal, two different performance, one is dust proof, one is sealed. Seal is to make the bearing internal grease (oil) in the use of the process does not lose, outside the unclean grease is not easy to inflow, to ensure that the bearing in a lubricated state; dustp roof is to protect the outside of the bearing from dust or harmful gases into the bearing cavity, in order to prevent bearing damage.
Fist. bearing and sealing
In recent years, bearings are equipped with sealing devices. In the past, the bearings are open. In order to ensure the lubrication and dust proofing of the bearings, sealing devices were installed on the shafts at both ends of the bearings. With the development of industry, especially the food industry, the popularity of modern office machinery and home appliances requires compact equipment design to reduce weight and prevent four-roller non-contact seal leakage and air leakage bearings. This means that the bearings themselves have sealing devices.
Commonly there are rubber or engineering plastic seals, and steel plate stamping seals (or dust caps). Sealing rings are available in a variety of sealing configurations, with different sealing effects. If there is a gap between the seal and the shaft, this is called a non-contact seal. The smaller the clearance, the better the sealing effect, but the lower the permitted shaft speed; and vice versa. If there is no clearance between the seal and the rotating shaft, it is called a contact seal. The larger the contact area of the seal contact lip, the better the sealing effect, but the lower the speed of the shaft, and vice versa.
Second, the bearing dust proof sealing method of expression
Dust proof with Z said, sealing with S said (felt ring seal with FS said; rubber seal with LS said).
1.Dust proof cover
Retaining ring type steel plate bearing dust cover, for miniature bearings, stamping metal steel plate with spring tight ring fixed on the outer ring structure.
Stamped steel plate bearing dust cover, reduce oil seepage, metal steel plate in the outer ring stamping to strengthen the structure.
2.Sealing ring
Retaining ring type Teflon bearing seal, mainly used for miniature bearings. Outer ring with glass fibre Teflon sealing ring structure, with spring tight ring.
Contact type rubber bearing seal, effectively prevent foreign body intrusion. The rubber seal is embedded in the outer ring of the bearing and the seal is in micro contact with the inner ring.
Depending on the specific environment in which the bearings and seals are used, the materials used for the dust caps and seals vary.
Post time: Apr-18-2023
