| 摘要 |
A centrifugal pump for use with a liquid forms one aspect of the invention. This pump comprises a housing and a rotor. The housing has an interior surface defining an interior cavity, an axis intersecting the cavity, an intake port for receiving liquid and communicating same to said cavity, and a discharge port in communication with said cavity. The rotor has an impeller, is positioned in said cavity and is rotatable in said cavity about said axis in spaced relation to the interior surface. The impeller is adapted to force said liquid to flow through said discharge port upon said rotation in use. The pump further comprises means for balancing the pressure in said cavity, adapted so as to avoid the creation of pressure differentials in said cavity that would otherwise in use tend to cause translation of said rotor in said cavity. The pump further comprises a rotating magnetic field generation device adapted to drive rotation of said rotor about said axis in use.
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