Non-contact seals are an effective solution in power transmission for various dynamically sensitive systems. They can be used with both rotating hubs and rotating shafts. Examples are gap seals and labyrinth seals, while gap seals function via interlocking teeth, labyrinth seals seal via a multitude of small hurdles. These create small chambers from which only a fraction of the sealed fluid ever reaches the next chamber.
How do non-contact seals work?
Non-contact seals such as gap seals or labyrinth seals seal without contact, with non-contact seals, the gap between the sealing element and the associated outer ring is so small that the flow resistance is significantly increased. The seal is therefore not created by a mechanical but a physical barrier.