Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

A mobile emergency water supply and drainage device is provided, which relates to the technical field of emergency rescue and disaster relief equipment. The device includes a submersible pump, relay pumps, and an electric power supply device for providing electric power for the submersible pump and the relay pumps. Frequency conversion control cabinets are arranged between the submersible pump as well as the relay pumps and the electric power supply device, and the submersible pump and the relay pumps are connected in series by pipelines for remote water supply and drainage. The device further includes a floating body for suspending the submersible pump in water, and the floating body floats on a surface of the water and is connected with the submersible pump through a lifting chain.

A propeller assembly to facilitate the cleaning of aquaculture nets. The propeller assembly has a centrally disposed hub with a plurality of plastic composite blades extending outwardly to a perimeter ring. A plurality of triangular shaped rigid knuckles are coupled to the perimeter ring. A blade spacer is attached to a leading edge of each blade, the knuckle and blade spacer are constructed of a wear resistant non-ferrous material, ferrous material, or combination thereof. In operation, rotation of the blades provides thrust for positioning the knuckles against an aquaculture net, whereby the knuckles remove fouling from the aquaculture net by violently shaking the aquaculture net. The blade spacer positions the propeller assembly a predetermined distance from the aquaculture net to protect the leading edge by distance and/or use of the wear resistant material.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.

A propeller assembly to facilitate the cleaning of aquaculture nets. The propeller assembly has a centrally disposed hub with a plurality of plastic composite blades extending outwardly to a perimeter ring. A plurality of triangular shaped rigid knuckles are coupled to the perimeter ring. A blade spacer is attached to a leading edge of each blade, the knuckle and blade spacer are constructed of a wear resistant non-ferrous material, ferrous material, or combination thereof. In operation, rotation of the blades provides thrust for positioning the knuckles against an aquaculture net, whereby the knuckles remove fouling from the aquaculture net by violently shaking the aquaculture net. The blade spacer positions the propeller assembly a predetermined distance from the aquaculture net to protect the leading edge by distance and/or use of the wear resistant material.

A rotor assembly and an electronic water pump are provided, and the rotor assembly includes an impeller cover, an impeller base and a rotor. One end of the impeller base is connected to the impeller cover, an outer wall of the other end of the impeller base is provided with a ring-shaped mounting recess, and the rotor is mounted in the mounting recess. The rotor comprises a rotor iron core, a sleeve and at least two end plates, the rotor iron core is sleeved on an outside of the impeller base and located in the mounting recess, the sleeve is sleeved on an outside of the rotor iron core to seal the rotor iron core in the mounting recess, the at least two end plates are located on both ends of the rotor iron core, respectively. And the at least two end plates are connected to the sleeve.

A pressure bushing for a centrifugal pump for fluid, the pressure bushing having a substantially cylindrical shape, and comprising at least: a bottom portion, an outer side portion, and an inner side portion opposing the outer side portion and having an inner circumference surface, wherein the inner circumference surface of the inner side portion tapers at least partially towards the bottom portion of the pressure bushing.

Embodiments of the presently disclosed subject matter relate to systems and methods for a pool pump. The pool pump may comprise an impeller, an inlet for receiving a liquid, an outlet for supplying the liquid, a chamber above the impeller configured to receive air from the liquid. The pool pump may further comprise a buoy or an exhaust plug configured to release exhaust gas from within the pool pump. A seal configured to seal against a sealing surface of a top cover to seal the chamber.