dimiSim©,  unique design
The special geometry of the design, in connection with the Van-der-Waal-effect of the liquid, secures a seal result, which could not be achieved with labyrinth seal in standard design.

A) Rotating parts in service
The splashing lube oil inside the bearing housing moves down to the static part of the sealing which is trapped of the outer groove and is lead around the seal to the bottom. Oil at the outer conical edge of the rotating seal part is driven to the corner by centrifugal forces and then tossed of 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 the oil down. 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. These connections tend to loosen over the time.

At the dimiSim© the power transmission takes place by clamping the sleeve to the shaft. Six grub screws in a groove in the sleeve of the inner thrower 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.

Advantages

The core advantage of dimiSim is  that it eliminates leakages, happen at conventional labyrinth seals as for instance:

Leaks due to inefficient sealing gaps if it comes to surging flooding

Leaks at a raised oil level as due to the capillary forces, excessive oil is  pumped up and the seal gaps reflooded. This effect can be stopped     only by cleaning after dismantling the seals.

Leaks due to defect O-rings because of axial movement beyond the        limits

Leaks due to increased splashing at sleeve bearings with forced feed      lubrication at higher pressure.

Specials
dimiSim© is highly suitable for machines with high energy concentration as here big diameter, high temperature and longer shafts with bigger elongation are combined.

Highlights
- reliable sealing, even at fast changing service conditions
- bigger axial movements are possible (up to 5mm)
- absolutely non contacting, non-wearing
- mechanical fixation of shaft and sleeve

Conclusion
dimiSim© seals efficiently,
-even if it comes to surging flooding, as the gaps are too wide  to build up the pumping effect due to capillary forces at small    gaps
-at increased axial movement
-as there is no wear at the O-rings due to the fixed position of  seal and shaft, so Live time is also increased
dimiSim© is reliable, safe, non-wearing and therefore service    friendly and cost savinge