Patent ID: 8905729
Filing Date: 2014-12-09
Classification: F04D

Abstract:
1. A rotodynamic pump having an inner drive electro-magnet coupling disposed inside an impeller comprising: a pump casing defining a pumping cavity; an inlet port connected to the pumping cavity; an outlet port connected to the pumping cavity; an impeller being rotatable about a rotational axis and disposed within the pumping cavity and having vanes; the impeller having a pumping region generally defined by an axial length of the vanes; an electro-magnet coupling that rotatably drives the impeller and that includes outer magnets that are connected to the impeller and a stationary component having multiple electro-magnets that are disposed inside of and are in alignment with the outer magnets; the pumping region being at least partially aligned with the electro-magnet coupling such that an imaginary plane that is perpendicular to the rotational axis of the impeller is able to pass through the pumping region and at least a portion of the electro-magnet coupling; a canister that is sealed to the casing and separates the outer magnets from the multiple electro-magnets; and a nose cone connected to a front end portion of the canister wherein the nose cone is sealed to the front portion of the canister by a static seal.