The Moineau Pump

Jens Gravesen
Department of Mathematics
Technical University of Denmark

The Moineau pump is an invention from 1931 by the French engineer René Moineau, US-Patent no. 1 892 217.

In 2006 the large Danish pump manufacturer Grundfos asked for a mathemtical analysis of the pump and brought the problem to the 57th European Study Group with Industry in Denmark.
The report can be found here.

The original design is based on hypo- and epi-cycloid and below the constructions are explained.
Curves Number of "teeths" on the stator and rotor
Hypo-cycloids 2:1 3:2 4:3
Epi-cycloids 2:1 3:2 4:3
Hypo- & epi-cycloids 2:1 3:2 4:3
New designs 3:2

Last modified: March 25 2008 15:29:17.