Principle
A) Rotating parts in service
The splashing lube oil inside the bear- ing housing moves down to the static part (light blue) of the sealing is trap- ped of the outer groove and is lead around the seal to the bottom. Oil at
the outer conical edge of the rotating seal part (violet) is driven to the corner by centrifugal forces and then thrown off by the spin of the disc. Oil on the vertical part is thrown off by centrifugal forces too. An additional conical ring at the sleeve takes off the oil, which might leak to the inner side of the disc, if the seal is flooded or during down coasting.
B) During downtime
the circumferential grooves lead away the oil to the sump. The trapping groove and labyrinth with drain assure, that no liquid leak through the rotating and static part of the seal. Neither from inside out, nor from the outside in.
C) At conventional non-contacting seals,
the axial and radial forces were transmitted by the elastomer seal rings (O-rings). These connections tend to loosen over the time.
At the dimiSim the power transmission takes place by clamping the sleeve (violet) to the shaft. Six grub screws in a groove in the sleeve of the inner thrower (orange) ensure an optimized result. The sleeve is kept in line. Axial and radial.
This fix connection allows a circumferential speed up to 130m/s for the biggest size. (See also the diagram on page eight)