An electric coolant pump system is presented including a housing having a main body and an end cap. The main body having a hollow interior and an open end. The end cap is operably connected to the main body and closes the open end of the main body. The system includes a rotor shaft operably connected to the housing. The system includes a rotor operably connected to the rotor shaft and positioned within the hollow interior. The system includes an impeller operably connected to the rotor. The system includes a stator configured to generate a rotating electromagnetic field during operation. The rotor is configured to rotate the impeller in response to the rotating electromagnetic field. The impeller is configured to pump a coolant when rotated. One or more components of the electric coolant pump system thermally expand and contract as the coolant is heated and cooled.

An improved leak resistant pump with sealing system for preventing leakage of a fluid from a housing. The sealing system has a housing, wherein the housing contains the fluid. A shaft penetrates the housing. A narrow fluid flow path directs a leaked fluid from the housing. A labyrinth seal constrains the leaked fluid from the narrow fluid flow path. A stationary seal constrains a flow of the leaked fluid from the labyrinth seal and a grease seal for constraining the flow of the leaked fluid from the stationary seal.

A centrifugal pump includes a selectable regenerative style pumping element, including a regenerative pump rotor and at least one side wall flow channel formed by a rotating disc. The regenerative pumping element is selectable between a first state in which the disc does not rotate with the impeller and a second state in which the disc rotates with the impeller.

Disclosed is a lip seal for water pump made of a rubber-like elastic material, fixed to a housing as a fixed side and in sliding contact with a shaft rotating relative to the housing; the lip seal having sliding surface with a surface roughness Ra (according to JIS B0601 corresponding to ISO 4287) of 1 to 30 m, being obtained by vulcanization-molding of a rubber composition comprising 100 parts by weight of the rubber-like elastic material, 1 to 150 parts by weight of a reinforcing filler, 5 to 90 parts by weight of a non-reinforcing filler having an average particle diameter of 1 m or more, 0.1 to 5 parts by weight of a coupling agent, 1 to 15 parts by weight of a co-crosslinking agent, and 0.5 to 10 parts by weight of an organic peroxide. The lip seal effects to prevent softening and volume swelling of the rubber-like elastic material and furthermore the generation of deposits in the rotating shaft, which are problematic for rotation torque and LLC resistance.

The present invention relates to a shaft coupling (also referred to as a spacer coupling) that couples a motor shaft and a pump shaft while both shafts are spaced from each other. The present invention is further relates to a pump apparatus having such a shaft coupling. The shaft coupling (10) includes: a first inner circumferential surface (23) capable of contacting an outer circumferential surface of a motor shaft (6); a second inner circumferential surface (24) capable of contacting an outer circumferential surface of a pump shaft (1); a step portion (26) protruding radially inwardly from the first inner circumferential surface (23) and capable of contacting an end portion of the motor shaft (6); and a spacer portion (28) located between the step portion (26) and the second inner circumferential surface (24).

A device is disclosed including a wear ring made with thermoplastic material formed as a hollow cylinder with an inside diameter and an outside diameter. The hollow cylinder may have multiple holes through at least a portion of the thermoplastic material from the inside diameter towards the outside diameter. The multiple holes may be passages between the inside diameter and the outside diameter that allow fluid under pressure to pass between the inside diameter and the outside diameter through the multiple holes.

An electric submersible motor thrust bearing system is described. An electric submersible motor thrust bearing system includes a thrust bearing assembly carrying a thrust of an electric submersible motor, the thrust bearing assembly including a split ring secured around a shaft of the electric submersible motor inward of a rotatable thrust runner, the rotatable thrust runner coupled around an outer diameter of the split ring and mated above a non-rotatable thrust bearing, the rotatable thrust runner serving as a barrier to radial expansion of the split ring, a lock ring secured to the thrust runner by a threaded connection, at least a portion of the lock ring above the split ring and at least a portion of the thrust runner below the split ring, and the threaded connection securing the split ring axially between the lock ring and the thrust runner.

A detachable water pump reservoir to collect coolant leakage from a housing of an engine water pump to which the reservoir is attached in use is described herein. The reservoir includes a hollow body defining a chamber in which the coolant leakage is collected and having a mouth shaped to complement a surface of the housing, at least one attachment apparatus configured to enable the reservoir to be easily and quickly attached to and removed from the housing of the water pump, and a level indicator to indicate the level of the coolant collected in the reservoir.

A thermal compensator for a motor seal, includes: a guide tube for receiving a shaft of the motor seal; a metallic bag disposed around the guide tube and having an expansion profile formed in at least a portion thereof to accommodate radial and circumferential expansion of the metallic bag; a pair of flanges attached to opposite ends of the metallic bag; and a pair of adapters fastened to the respective flanges and receiving respective ends of the guide tube.

The present invention pertains to an electric submersible pump (ESP) system. The system usually has one or more downhole devices comprising one or more pumps and one or more motors for operating the one or more pumps and surface equipment. The surface equipment includes a controls enclosure configured to operate the ESP system and a power cable configured to provide communication from the controls enclosure to one or more of the downhole devices. The controls enclosure is configured as an enclosure on the surface comprising at least two compartments separated based on exposure to voltage potential.