Labyrinth seals are also called puller seals and comb tooth seals. They are widely used in fan products. The interstage seals on centrifugal fan products basically use labyrinth seals. The shaft end seal for conveying air is not high in pressure. The case also uses a labyrinth seal.

The floating ring seal uses the pressure oil film formed between the main shaft and the floating ring, and the balance between the combined pressure of the oil film and the external load (pressure of the working medium) to seal the axial leakage of the working medium. Because the floating ring seal has the advantage of self-aligning the center, the sealing gap can be smaller, the leakage amount can be reduced, the pressure of the sealing body can be adjusted according to the pressure of the sealed medium, and the liquid friction between the floating ring and the shaft is maintained. condition, thus avoiding mechanical wear.

This seal is used when the pressure is high or when corrosive gas is transported, so that the transport gas does not leak out.