Development of the Floating Centrifugal Pump by Use of Non Contact Magnetic Drive and Its Performance

Abstract

This article focuses on the impeller construction, non contact driving method and performance of a newly developed shaftless floating pump with centrifugal impeller. The drive principle of the floating impeller pump used the magnet induction method similar to the levitation theory of the linear motor. In order to reduce the axial thrust by the pressure different between shroud and disk side, the balance hole and the aileron blade were installed in the floating impeller. Considering the above effect, floating of an impeller in a pump was realized. Moreover, the performance curves of a developed pump are in agreement with a general centrifugal pump, and the dimensionless characteristic curve also agrees under the different rotational speed due to no mechanical friction of the rotational part. Therefore, utility of a non contacting magnetic-drive style pump with the floating impeller was made clear.

Research on the Analysis Method of Magnetic Field in the Axial Magnetic Drive Mechanism

“…Thus, the permanent magnetic drive mechanisms have following notable advantages: energy conservation and environmental protection, clean production, simplification of the mechanical structure, overload protection and non-contact friction-free transmission, etc.. It is especially suitable for the occasion on which the driven rotor cannot be driven directly by using the mechanical transmission mechanism, or the work medium of the transmission mechanism is liquid and it is difficult to seal [1][2][3][4] . Therefore it is known as the green drive mechanism.…”

Approaches to stable operation of shaftless centrifugal pump

“…The authors have been developed the new type noncontact driving pump without any monitoring and control devices [1] . This pump has no bearing and no seal part.…”