A process fluid lubricated pump includes a housing with an inlet to receive the fluid, and an outlet to discharge the fluid, a shaft extending from a drive end to a non-drive end and rotatable about an axial direction, the drive end of the shaft arranged outside the housing, a hydraulic unit including impellers mounted on the shaft, a collection chamber to collect leaking process fluid, the collection chamber comprising an exit, through which the shaft passes, and an exit to discharge the process fluid, and a throttle device arranged between the hydraulic unit and the collection chamber, the throttle device comprising a stationary throttle part having first and second axial faces delimiting the stationary throttle part, the first axial face facing the collection chamber, and the throttle device including a throttle gap surrounding the shaft and extending from the first axial face to the second axial face.

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 rotor for an axial-flow blood pump has blades projecting outwardly from a hub and channels between the blades. The blades incorporate hydrodynamic bearing surfaces capable of suspending the rotor during operation. The rotor has a configuration which provides superior pumping action and reduced shear of blood passing through the pump. The forwardly facing pressure surfaces of the blades may include outflow corner surface at their downstream ends. The outflow corner surfaces desirably slope rearwardly and intersect the rearwardly-facing suction surfaces of the blades at outflow ends of the blades.

Provided is an electric water pump in which a portion of a fluid discharged from the vicinity of an outer peripheral edge of an impeller flows between the impeller and a lower casing, flows between a rotor and the lower casing, flows between a shaft and the rotor along a channel formed inside the rotor, and then flows to an inlet side of the impeller such that the fluid circulates outside and inside the rotor, and thus, foreign matters contained in the fluid do not accumulate in an accommodation space between the rotor and the lower casing, and thus, efficiency and durability of a motor can be improved.

A multistage centrifugal pump has a rotatable shaft, a plurality of pump stages and a thrust module. Each of the plurality of pump stages has an impeller connected to the rotatable shaft and a stationary diffuser. The thrust module has a thrust runner and a unitary thrust pad. The unitary thrust pad has an axial wear face adjacent the thrust runner and a radial wear surface adjacent the rotatable shaft. The axial wear face and radial wear surface are integrated as a unitary component. The unitary thrust pad is secured to a thrust pad support with threaded fasteners that are torqued to a predetermined extent.

Provided is an electric motor-integrated rocket engine pump. The electric motor-integrated rocket engine pump comprises: a housing; a rotating body provided in one direction inside the housing; an electric motor provided inside the housing, and integrally shaft-coupled to the rotating body; and a plurality of fluid bearings are mounted on front and rear rotating bodies of the electric motor to support rotation of the rotating body.

An apparatus is provided for providing access to one or more axial proximity probes for monitoring axial position of thrust collars of a pump shaft to enable improved adjustment of the axial proximity probes by the pump operator. The apparatus includes a plurality of side walls configured to surround one or more axial proximity probes configured to measure axial position of one or more thrust collars in a pump bearing housing, at least one access window formed through at least one side wall of the apparatus configured to provide access the one or more axial proximity probes and at least one removable access plate configured to cover the at least one access window.

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).

The pump includes a ring-shaped first inclined surface formed in a portion of a production pipe located above a motor stator and inclined in a direction toward a central axis of the production pipe with respect to a direction from an upper end to a lower end of the production pipe, and a ring-shaped second inclined surface that is formed outside a lower end portion of a pump stator constituting an inner element and comes into surface contact with the first inclined surface.

An electrical submersible pump assembly for pumping well fluid from a well has a motor and a pump. The motor having a motor shaft that drives a pump shaft of the pump. A thrust bearing unit between the motor and the pump has a thrust bearing shaft that rotates a thrust runner in sliding engagement with a non-rotating thrust bearing base. A pump shaft coupling couples the thrust bearing shaft with the pump shaft. A motor shaft coupling couples the thrust bearing shaft with the motor shaft. At least one of the couplings has a one-way clutch that allows forward direction rotation of the thrust bearing shaft and prevents reverse direction rotation.