Magnetic gear concept for a sealless power transmission of a rotary piston pump

Pumps are used to transport fluids or to compress gases [1]. One of the main problems is to separate the fluid of the pump from the environment. Such sealings are in the focus of studies for linear, rotational and centrifugal pumps. To overcome this problem a new electromagnetic concept based on a rotary piston engine is introduced. This particular construction consists of two fluid chambers. Most conventional designs consist of a rotor with a toothed wheel which is mechanically connected to the shaft of an external, electrical motor. Here, a magnetically force transmission, similar to a magnetic gear [2] is introduced, which offers the advantage of minimal contact surfaces [3]. This avoids the problem of impurities and the tribological behavior could be minimized as well. The mechanical power is transmitted via a magnetic coupling to achieve a closed housing.