Bearing seal in the form of non-contact

Non-contact sealed bearings, there are three common forms: gap seals, seal and slinger labyrinth seal. Because there is a gap, in addition slinger seals, non-contact seals are used for grease lubrication occasions. In order to improve the reliability of sealing can be combined with various types of sealing.
Non-contact bearing sealing device has the following advantages: at the sealing gap there is a lubricant in addition to internal friction of the friction will not be other, therefore, non-contact seals no wear; use a very long time is not have a significant temperature rise; applicable where high speed. However, sealing the gap can not be too large, otherwise the sealing effect poor.
Bearing support portion includes a non-contact seals: sealing gap. Its structure is simple and can meet the general requirements under seal. E selection of the gap d ≤ 50mm, e = 0.25 ~ 0.40mm; d> 50mm, e = 0.25 ~ 0.6mm. Groove seal. After filling the trench so that dust is hard to invade the grease, with the ring groove and the helical groove forms. Ring groove generally have three. Width b = 3 ~ 5mm; groove depth t = 4 ~ 5mm.
Labyrinth seal. When the maze labyrinth filled with grease and sealed better than trench sealed. Bearing labyrinth seals can be divided into two types of radial and axial. Radial and axial clearance selection: d ≤ 50mm, a = 0.20 ~ 0.30mm, b = 1.0 ~ 1.5mm; d = 50 ~ 200mm, a = 0.30 ~ 0.50mm, b = 1.5 ~ 2.0mm.
Oblique labyrinth seal. It is used for shaft deflection large curved road slope can swing with the center. Oblique curved road labyrinth seal can be achieved after the grease filled in a better sealing effect.
Slinger seal. Oil lubrication, the shaft out of the trench or install a ring, you can drain the oil out of the desire thrown radially through the bearing cap assembly back into the oil chamber with oil sump hole. You can also close the bearings mounted oil ring toss, this structure is often used in combination and crevice seal.
Stamping steel bearing labyrinth seal. The stamped steel labyrinth seal consisting of synthetic, with which we can rely on stamping steel mounted on the shaft or housing, not axially tightened, simple structure. If the stamping steel labyrinth maze filled with grease, with good sealing effect.