Rotary positive displacement machine

Rotary positive displacement machine
TECHNICAL DESCRIPTION
Notre référence :
85279-01
Status des brevets
French patent
application FR0210959
filed on September 5th,
2002 and entitled
"Machine tournante à
capsulisme"
This positive displacement machine is made of two rotors, one inside the other, which
rotate at different speeds around parallel axes.
There are sliding contacts between the rotors, and cavities of variable volumes are formed
between the consecutive contacts.
The specific feature of the geometry is that each cavity begins and ends with a zero
volume. In the positions where these events occur, the two rotors are osculating (the
relative curvature is zero) and this has several interesting consequences.
There are two types of this geometry: the external rotor may have one lobe more or less
lobe than the internal one.
It may be straight, have a short or long helix with different distribution mechanisms.
The long helix results in geometrically exact instances of the progressive cavity machine
(Moineau pump).
INDUSTRIAL APPLICATIONS
With liquids:
Inventeurs
André KATZ
hydrostatic transmission (pumps and motors)
pumping of delicate fluids (as emulsions)
pumping of liquids in equilibrium with their vapor, even in the cryogenic field.
With gas:
compressors, vacuum pumps and related machines.
Status Commercial
Non-exclusive licenses
and collaborative
research.
Laboratoires
Centre de Physique
Théorique de l’École
Polytechnique (CPHT,
UMR7644), Palaiseau,
France
Mots clés :
Pump
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