A water-cooling device includes a pump case, at least one winding, a driver and a heat exchange member. The pump case has a top section, a bottom section and a peripheral section together defining a pump chamber. The winding is disposed on a circuit board. The circuit board is disposed on any of the top section, the bottom section and the peripheral section. The driver is disposed in the pump chamber. At least one magnetic member is disposed on the driver in a position corresponding to the winding, whereby the magnetic member can induce and magnetize the winding on the circuit board. The heat exchange member is connected with the pump case. By means of the structural design of the water-cooling device, the volume of the water-cooling device is greatly minified and the structure of the water-cooling device is thinned.

An electric water pump is configured to reduce an axial distance between a stator and a rotor. Since a separator of a stator casing is formed so as not to cover an upper surface of a stator, the axial thickness of the separator is reduced and the axial distance between the stator and the rotor is also reduced. The reduction in the axial distance allows a motor to have increased output and efficiency.

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 pump includes: a housing in which a pump chamber accommodating an inner rotor and an outer rotor is formed in a pump chamber formation surface, and an O-ring groove is formed around the pump chamber; an O-ring that is placed in the O-ring groove; and a plate that is attached to the pump chamber formation surface and closely contacts the O-ring to close the pump chamber. Inter-hole grooves connecting to an outer edge of the pump chamber formation surface are formed around the O-ring groove.

A fluid pump assembly is provided. The pump has a pair of units magnetically coupled to each other. The first unit contains a drive motor and a magnetic assembly. The second unit contains a magnetic assembly and a blade of a propeller/impeller for imparting movement to a fluid. As the first unit is activated by the drive motor, a magnetic flux is created which in turn rotates the magnetic assembly in the second unit, driving the blade.

A pump assembly can pump fluid with a single moving part. The pump includes a casing with an inlet and an outlet. The pump includes an impeller to rotate inside the casing to create low pressure at the inlet and increase pressure to expel fluid from the output. The impeller is physically connected to a rotor within the pump casing. The rotor includes permanent magnets arranged radially around a surface of the rotor opposite the physical connection to the impeller. A variation replaces the magnets with a switched reluctance path. The pump includes a stator assembly within the casing, magnetically coupled to the rotor, the stator assembly having electrically controllable conductors to drive the rotor with axial flux. The stator assembly includes stacks of multiple layers of coated conductor having multiple spokes as the stator core.

A pump assembly can pump fluid with a single moving part. The pump includes a casing with an inlet and an outlet. The pump includes an impeller to rotate inside the casing to create low pressure at the inlet and increase pressure to expel fluid from the output. The impeller is physically connected to a rotor within the pump casing. The rotor includes permanent magnets arranged radially around a surface of the rotor opposite the physical connection to the impeller. A variation replaces the magnets with a switched reluctance path. The pump includes a stator assembly within the casing, magnetically coupled to the rotor, the stator assembly having electrically controllable conductors to drive the rotor with axial flux.

The present disclosure provides a micro water pump, including: a pump body having a cavity, an inlet communicating with the cavity, and an outlet communicating with the cavity; a drive mechanism installed on the pump body for driving liquid from the inlet into the cavity and discharging from the outlet. The pump body includes a base, an upper cover engaging with the base for forming the cavity, and a barrier member. The upper cover includes a fixed wall located in the cavity. The barrier member protrudes from the fixed wall for preventing the drive mechanism from colliding and rubbing with the fixed wall during rotation. By virtue of the configuration, improved heat-dissipation performance is performed.

A coaxial pump or turbine module includes an integral, modular motor or generator comprising a magnet structure containing radial or axial permanent magnets and/or induction coils detachably fixed to a rotor, and a stator housing detachably fixed to the module housing. Working fluid is directed axially through a flow path symmetrically distributed within an annulus formed between the module housing and the stator housing. The stator housing can be cooled by the working fluid, or by a cooling fluid flowing between passages of the flow path. The flow path can extend over substantially a full length and rear surface of the stator housing. A plurality of the modules can be combined into a multi-stage apparatus, with rotor speeds independently controlled by corresponding variable frequency drives. Embodiments include guide vanes and/or diffusers. The rotor can be fixed to a rotating shaft, or rotate about a fixed shaft.

A pump group of a cooling system of a vehicle is provided. The pump group extends along a main axis and includes an axial flow stator that produces an electromagnetic action in a direction parallel to the main axis, and two command modules positioned at two opposite axial ends of the axial flow stator. Each command module has an impeller, an impeller shaft extending along the main axis and having an impeller end, the impeller being integrally connected to the impeller end, and a control portion configured to receive a rotational control action. A rotor is integrally connected to the control portion that is controllable in rotation by action of the axial flow stator.