There is provided a resin molded rotor, comprising: a rotor configured to hold a magnet; a main shaft provided with the rotor mounted thereto and configured to transmit power to outside; and a resin mold configured to integrally cover the rotor and part of the main shaft on respective sides in an axial direction of the rotor, wherein an O-ring is placed between the resin mold and the main shaft to seal between the resin mold and the main shaft.

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.

The present invention relates to a filtration unit for filtering the water in a pool or basin, in particular a swimming pool, said unit being mounted behind a wall of said pool, and communicating with said pool via a suction intake (3, 6) and via a delivery orifice to generate a forced flow of water from and back into the pool through a filtration tank and through a suction column by means of centrifugal hydraulic pump. The centrifugal hydraulic pump has an electric motor coupled to a centrifugal turbine housed in a pump body. The electric motor is a sealed, brushless, autonomously controlled motor that is powered at very low voltage and that may advantageously be immersed inside the filtration unit below the level of the water contained in said pool, thereby enabling said motor to be cooled and sound-proofed naturally by the forced flow of the water from the pool, thereby forming a filtration unit and a pool that have low energy consumption.

An electric pump includes: a motor; an impeller rotated by the motor; a motor housing portion that houses the motor; an impeller housing portion that houses the impeller and is positioned at one side with respect to the motor housing portion in a rotation axis of the motor; an introduction pipe portion that introduces a fluid into the impeller housing portion and is positioned at the one side with respect to the motor housing portion; a discharge pipe portion that discharges the fluid from the impeller housing portion; a printed circuit board electrically connected to a coil of the motor and positioned at the one side with respect to the motor housing portion; and an electronic part mounted on the printed circuit board, wherein the printed circuit board includes a cutout portion and faces the impeller housing portion.

An electric water pump of which productivity, maintainability, and use convenience may be improved by simplifying a production process through a change in a structure, and a method of manufacturing the same. The electric water pump includes: a pump housing accepting a motor therein; an acceptor having a cylindrical shape of which one side is opened and formed at one side of the pump housing; a control substrate installed in the acceptor; an external terminal formed of a conductor and penetrating through the acceptor to electrically connect the control substrate to an external power supply; and an internal terminal formed of a conductor and penetrating through the pump housing and the acceptor to electrically connect the motor and the control substrate to each other.

A pump group of a cooling system of a vehicle engine is provided. The pump group extends with respect to an axis (X-X) and has an impeller, a shaft, the impeller being integrally mounted on the shaft, an electric motor having a rotor integrally mounted on the shaft and a stator. A pump body, extending with respect to the axis (X-X), has an impeller casing housing the impeller in an impeller chamber, and a motor casing housing the electric motor in a motor chamber. The motor casing has an intermediate tubular wall positioned between the rotor and the stator so as to define a rotor chamber and a stator chamber sealingly separated from each other. The stator chamber contains a predefined amount of cooling oil, the predefined amount of cooling oil at least partially filling the stator chamber so that the stator is cooled by convection.

Provided is a water pump including: a housing; a support shaft fixed to the housing; an impeller disposed on an upper portion of the housing; a stator disposed inside the housing; a rotor rotatably supported to the support shaft; and a connecting member inserted in the supporting shaft to rotatably support the rotor and connecting between the rotor and the impeller, thereby reducing the number of parts and simplifying a manufacturing process.

A canned motor device includes a fixed seat, a motor unit, and a rear cover protector and a leakproof member. The rear cover protector has a main body portion disposed between a case body and a stator of the motor unit and sleeved around a cylindrical portion of the case body, and an extended portion connected to the main body portion, perpendicular to an axis, fluid-tightly abutting against a flange portion of the case body, and having an outer periphery that surrounds the axis and that has an outline larger than that of an annular periphery of the flange portion of the case body. The leakproof member is mounted between the flange portion of the case body and the extended portion of the rear cover protector.

A centrifugal pump for conveying a fluid includes a housing having an inlet and an outlet for the fluid. An impeller is arranged in the housing for rotation in an axial direction to convey the fluid from the inlet to the outlet, a shaft extends in the axial direction for driving the impeller, and a stationary guide device for guiding the fluid from the impeller to the outlet is connected to the housing. A resilient compensating element is disposed between the housing and the guide device, is arranged around the shaft, and holds the guide device in a centered position to the impeller during a radial relative movement to the housing.

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.