Analysis of the form and function of the bearing seal

Bearing seal of the main type refers both end faces of the rolling bearing , the effect of mounting a sealing device . Bearing Sealed With industrial development gradually into the horizon , in recent years that it has been the focus of a technology before the development of the bearing seal bearings are all open bearings .
In the form of bearing seal
Different structure of the bearing seal ring , the sealing effect is also a difference . Seal and the shaft bearing bolt seals a gap between , called non-contact bearing seals , which seal the sealing is better the smaller the gap , but the gap is reduced to allow the shaft will reduce the rotational speed , and vice versa The greater the gap sealing effect is worse , the higher the rotational speed of the shaft allows .
Bearing seal between the shaft seal and the gap does not exist , is known to be contact seals . Bearing seal with contact seal type, seal lip contact with the contact surface of the shaft determines the sealing effect , the greater the contact surface of sealing better, but allows lower speed shaft , otherwise the smaller sealing surface in contact with the sealing effect is more poor, but the shaft allow higher speed .
The role of bearing seal
Maintained a rolling bearing seal the inside and the outside is basically in isolation , bearing the added variety of internal lubricants, grease substances minimal wastage , and lubrication effect has been significantly improved , thus bearing seal can to a large extent to maintain bearing lubrication state.
Another effect of the bearing seal is cut off from the outside world inside the bearing contact with various substances to reduce dust ,strap seals harmful gases and other substances into the bearing cavity chance to reduce impurities inside the bearing because of the formation of a variety of injuries infringement . From one hand, the relative bearing seal can improve bearing life.