Disclosed is a rotary pump including a magnetic rotor arranged in a pump housing and having a magnetic rotor plane, which rotor is operatively connected to a drive for conveying a fluid. The drive is a bearingless motor having a stator configured as a bearing stator and drive stator and having a magnetic stator plane, wherein the stator bears a drive coil and a bearing coil lying in the stator plane and/or a drive bearing coil. The rotor is magnetically contactlessly journalled within the stator, wherein an axial height (H) of the rotor is smaller than or equal to half a diameter (D) of the rotor so that the rotor is passively magnetically stabilized by reluctance forces with respect to the magnetic stator plane both against axial displacement and against a tilt from an equilibrium position.

A pump motor having a permanent magnet rotor, a containment shell, a wound stator, a motor housing, a pump head, a shaft, which is secured in the containment shell on the one hand and in the pump head on the other hand, and a fixed bearing, which is pressed or injected into the permanent magnet rotor and rotatably mounts it on the shaft. The pump motor provides a reliable and economically producible bearing of the permanent magnet rotor on the shaft in a generic pump motor, in which the bearing abutting uniformly against the shaft over the entire bearing length and during a complete rotation can be achieved, small angle errors can be compensated, and noises can be reduced.

A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.

A cooling fan and an air-cooled refrigerator are provided. The cooling fan includes a synchronous motor and an impeller. The synchronous motor includes a stator and a permanent magnetic rotor. The permanent magnetic rotor includes a rotary shaft and a permanent magnetic rotor main body attached around the rotary shaft. The stator includes a stator core and a stator winding wound around the stator core and powered by an alternating-current power supply. The permanent magnetic rotor operates at a constant rotational speed of 60f/p during a steady state operation of the motor, where f is a frequency of the AC power source and p is the number of pole pairs of the permanent magnet poles. The impeller is connected to the rotary shaft for rotation under the driving of the rotary shaft.

A centrifugal pump for delivering coolant in vehicles and providing a centering of a pump impeller and a dampening of motor vibrations. The centrifugal pump having a pump housing consisting of a pump head, which forms a single part with a suction nozzle, a discharge nozzle, a spoke, and a bearing support, in which a counter bearing is mounted, in which a first region of a shaft is supported, around which a pump impeller is rotatably mounted via a slide bearing secured in the pump impeller, the spoke retaining the bearing support in a central position within the pump head and having a containment shell, which separates a wet chamber from a dry chamber and in which a second region of the shaft is supported. The invention seeks to solve the problem of providing in a generic centrifugal pump.

A pump includes: a rotor; a magnetic bearing supporting the rotor by a magnetic force; a drive mechanism rotationally driving the rotor; a pump mechanism including an impeller attached to the rotor; and a control unit controlling the magnetic bearing which includes: a bearing rotor member in the rotor formed from a magnetic material; and a bearing stator member facing the bearing rotor member, the bearing stator member has: a core formed from a magnetic material; and a coil wound around the core, the drive mechanism includes: a driven member adjacent in a radial direction to the bearing rotor member; and a drive portion facing the driven member in the radial direction, and magnetically coupled to the driven member to drive the rotor, and the control unit corrects rotational position of the rotor based on a detection signal from a first sensor portion capable of detecting displacement of the rotor.

The present invention relates to a motor pump (10) free from bearings, cooler and mechanical sealing, more specifically to a hydraulic motor pump, which comprises a housing (14) defined by a first chamber (19) isolated from fluids and a second chamber (17). In the second chamber (17) there is an integral rotor/turbine assembly (11), the rotor and the turbine being induced by magnetic forces of a stator (12), which is located in the first chamber (19). A fluid inlet (15) and a fluid outlet (16) are located at the same end of the motor pump (10), so that most of the fluid impelled into the motor pump (10) is guided directly to the outlet (16) with the aid of a fluid guide (20) located at the front end (24) of the rotor/turbine assembly (11), enabling an increase in the flowrate inside the motor pump (10), thus increasing the yield thereof.

A blood pump includes a rotor mounted in a pump housing via a bearing. The housing includes a metal rod extending from the outer wall of the housing towards the inner side of the housing. The rod allows dissipating heat and has a stabilizing action.

The invention provides a subsea pump system, comprising a subsea centrifugal pump with a motor compartment and a process compartment, wherein the motor compartment is separate from the process compartment and comprises an electric motor or stator driving a motor shaft, wherein the process compartment comprises a pump arranged on a pump rotor, an inlet for fluid and an outlet for pressure boosted fluid, and wherein the motor shaft via a coupling preferably drives the pump rotor. The subsea pump system is distinguished in that it further comprises a liquid phase separator arranged downstream to the pump or downstream to at least one pump impeller, the liquid phase separator comprising: an inlet receiving the pressure boosted fluid, an outlet delivering a majority, or a minor part, of the pressure boosted fluid, and a liquid phase outlet, a liquid recirculation line, a flow mixer arranged on the inlet side of the pump, wherein the liquid recirculation line is arranged from the liquid phase outlet to the flow mixer, and a liquid lubricant line arranged from a location containing pressure boosted fluid to one or more process compartment bearings, directly or via other equipment, for lubricating said process compartment bearings.

A pump unit for a centrifugal pump includes a pump housing with an inlet and with an outlet for a fluid to be conveyed, and a rotor arranged in the pump housing to convey the fluid, the rotor configured to be rotated about an axial direction, the pump unit capable of non-contact magnetic levitation of the rotor and non-contact magnetic drive of the rotor by a stator. The pump housing has a cover part and a bottom part to enclose the cover part, the bottom part having a cylindrical cup to receive the rotor, the cylindrical cup configured to be inserted into the cup-shaped recess of the stator. Both the inlet and the outlet of the pump housing are arranged at the cover part.