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How does a Three Lobe Root's Pump Work?
This is a Flash Animation of a helical three Lobes Roots Pump ( Blower ).
In order to make 3D visualization of the lobes I set transparency of the lobes very low.
Each layer is 5 degrees off from the previous layer. I found this adequate to demonstrate the idea.
The Roots type supercharger or Roots blower is a positive displacement pump which operates by pulling air
through a pair of meshing lobes not unlike a set of stretched gears. Air is trapped in pockets surrounding
the lobes and carried from the intake side to the exhaust. The supercharger is driven directly from the
engine's crankshaft via a belt or, in a two-stroke diesel engine, by spur gears.
It is named for the brothers Philander and Francis Marion Roots of Connersville, Indiana, who first patented
the basic design in 1860 as an air pump for use in blast furnaces and other industrial applications. In 1900,
Gottlieb Daimler included a Roots-style supercharger in a patented engine design, making the Roots-type
supercharger the oldest of the various designs now available.
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