A first fluid rotor that has a first fluid intake end and a first fluid discharge end. A second fluid rotor that has a second fluid intake end and a second fluid discharge end. The second fluid rotor is rotatably coupled to the first fluid rotor to rotate in unison with the first fluid rotor along a shared rotational axis. The first fluid intake end and the second fluid intake end are facing opposite directions. A first fluid stator surrounds the first fluid rotor. The first fluid rotor and the first fluid stator form a first fluid stage. The second fluid stator is aligned along the rotational axis. The second fluid stator and the second fluid rotor form a second fluid stage. A flow crossover sub is positioned between the first fluid stage and the second fluid stage.

Stationary diffusers, downhole centrifugal pumps, and methods of pressurizing a fluid may include vanes configured to direct fluid flow through fluid passageways, where at least some of the vanes include a bulge or protrusion extending axially beyond the fluid passageways into an open rotational volume of the diffuser in a direction toward an impeller.

Systems and devices for cooling servers are provided. In one aspect, a cooling device includes a first axial pump including a body having an impeller, the first axial pump coupled to a first pump housing, the first axial pump housing coupled to a chassis, a rack, a row of racks, or one or more racks of the row of racks that are housing one or more servers. The cooling device also includes an inlet pipe coupled to an inlet of the first pump housing, the inlet pipe supplying cooling fluid to the first axial pump. The cooling device also includes an outlet pipe having an outlet coupled to the first pump housing, the outlet pipe receiving the cooling fluid from the first axial pump.

The present disclosure relates to a downhole centrifugal pump system designed to include a diffuser configuration which optimally transfers fluid and builds head pressure at a dead zone between the diffuser and an adjacently upper impeller, the dead zone being defined as an open rotational area between the stationary diffuser and the adjacently upper impeller. The diffuser includes a first side for receiving fluid from a first impeller and a second side for transferring the fluid upwardly to the adjacently upper impeller. The diffuser also includes a plurality of vanes that direct fluid flow from the first side to the second side. Each vane of the diffuser includes an edge at the second side that includes a bulge between a proximal edge and a distal edge on the second side. The bulge advantageously extends upwardly toward the second impeller to reduce the dead zone relative to if the second edge extended linearly from the proximal edge to the distal edge. The structure of the bulge facilitates a head pressure buildup at the dead zone that improves the efficiency of the downhole centrifugal pump system as fluid moves from the diffuser to the adjacently upper impeller.

A suction chamber for use in a surface pumping system includes a central housing that is substantially cylindrical and has a motor end and a pump end opposite the motor end. The suction chamber includes a motor-end plate bolted to motor end of the central housing and a pump-end plate bolted to the pump end of the central housing. The suction chamber also includes an inlet branch connected to the central housing. A method for assembling a non-welded suction chamber is also disclosed.

The present disclosure refers to a pump (1) comprising a rotor shaft (13) extending along a rotor axis (R), a bearing body (19) circumferentially encompassing the rotor shaft (13) and comprising a radially outer bearing surface (32), and a locking ring (25) circumferentially encompassing the rotor shaft (13) and limiting an axial movement of the bearing body (19) relative to the rotor shaft (13),
wherein the locking ring (25) comprises at least two radially inwardly protruding teeth (49, 51, 53, 55), wherein the locking ring (25) is radially expandable from a locking state to a mounting state against an elastic restoring force of the locking ring (25), wherein the locking ring (25) is, in the mounting state, positionable at a desired axial position on the rotor shaft (13), wherein the teeth (49, 51, 53, 55) are configured to press, in the locking state, against a radial outer surface (31) of the rotor shaft (13) by the elastic restoring force of the locking ring (25).

A vertical electric pump for moving a liquid, comprising a containment jacket which encloses inside it: a mechanical section, which comprises an intake port and a delivery port, the mechanical section containing an assembly for the movement of the liquid which comprises one or more impellers, spaced out by diffusers and keyed on a driving shaft, an electromechanical section, comprising an electric motor, which in turn comprises a rotor and a stator that surrounds the rotor, the rotor being keyed on the driving shaft, the electric pump comprising a set of instruments for the control and monitoring of its operation.

The set of instruments for the control and monitoring of the operation of the electric pump is accessible entirely from a single side of the electric pump.

A modular pump system permits combining multiple discrete pump assemblies in serial and/or parallel configurations to tailor system output to user needs. The assemblies may be combined by hand quickly, without the needs for tools, to permit use in remote areas.

An electrical submersible pump has a stack of diffusers within the housing, each of the diffusers having a conical upper shoulder and a conical lower shoulder. The lower shoulder of each of the diffusers is in abutment with the upper shoulder of an adjacent one of the diffusers. The upper and lower shoulders of each of the diffusers slope downward and outward relative to the axis. Impeller hubs have conical upper and lower ends. At least some of the upper ends of the hubs abut and transfer up thrust to the lower end of an adjacent one of the hubs. At least some of the lower ends of the hubs abut and transfer down thrust to the upper end of an adjacent one of the hubs.

A shredding assembly for a grinder pump includes a stationary shredding ring mounted to an inlet of the pump, and a cutting device rotatable about an axial direction and fixed to a shaft of the pump. The shredding ring includes a top face, a bottom face, and a central opening extending from the top face to the bottom face and delimited in a radial direction by an inner periphery. Slots extending in the axial direction are formed in the inner periphery. The cutting device is positioned in the central opening of the shredding ring, and includes a front face and a back face. The front face includes a plurality of first cutting members extending in the axial direction and facing the slots. The back face includes a second cutting member projecting beyond the central opening with respect to the radial direction.