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• Not new, but not common

  DeepSOIC • 12/14/2015 at 17:03 • 0 comments

  Thanks to ppemawm user at FreeCAD forum, who pointed out that the design is known for ages. It is called "screw-type labyrinth seal" or "labyrinth pump". The internet is definitely not full of pictures of this design.

  See ppemawm's post here: http://forum.freecadweb.org/viewtopic.php?f=24&t=13507&p=108132#p108125

• First impressions

  DeepSOIC • 12/14/2015 at 00:42 • 0 comments

  So I designed a first model, 3d-printed it, and hacked it around a motor of a conventional fan.

  And it works!

  First, I was very surprised that the rotor itself works like a fan, with no stator. The blowing is quite directional, closer to being axial than radial.

  Then, when I've put it all together, I did a rough comparison with a similarly sized fan (the one on the photo)

  Free-standing:
  * the amount of airflow feels comparable, the conventional fan is probably doing a bit better
  * the amount of noise is similar, but different whine frequencies (my one makes a higher-pitched whine
  Blocked:
  * the suction of my fan is substantially better
  * my fan makes much more noise when blocked. And compared to conventional fan, which starts to spin faster when blocked, my one slows down instead.
  All in all, I think this crude attempt worked absolutely fantastic! It was just a quick test to see if it wound make airflow at all!
  

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