Technologies are generally described for pump devices that include an adaptive cutwater and impeller arrangement. The power end of the pump device can be coupled to a motor to drive an impeller. The primer plate and impeller of the pump device are removable from the pump casing such that the primer plate and impeller can be replaced or modified as desired for different applications. In some examples, the pump casing includes a primer plate that is removable from the pump casing, where the primer plate includes a discharge cutwater tongue that is specifically spaced and sized to service an impeller of a desired design. The discharge cutwater tongue and impellers in the pump device may thus be serviced for replacement parts, as well as to modify the pump device for different fluids of different fluids properties or hydraulic requirements as may be needed in different applications.

A double suction impeller is disclosed. In at least one embodiment, the impeller is configured for centrifugal pumps and hydraulic power recovery turbines. The impeller's flow-path arrangement comprises inter-blade channels, intersecting each other at the impeller's outer diameter and defining a variable cross section shape, so that the equivalent number of blades is at least doubled with respect to a conventional configuration obtained by the coupling of two single suction impellers and an improved control over the velocity of the flow within the inter-blade channels is achieved.

A centrifugal impeller is disclosed having a non-axisymmetric flowpath surface. The centrifugal compressor may comprise a hub and a plurality of circumferentially spaced vanes. The hub has a flowpath surface and an axis of rotation. The plurality of circumferentially spaced vanes extend from the flowpath surface, with each of the vanes having a pressure-side fillet and a suction-side fillet extending from a leading edge to a trailing edge of the vane. The pressure-side fillet and suction-side fillet intersect the flowpath surface at a runout. The runout of the pressure-side fillet of a first vane is asymmetric to the runout of the suction-side fillet of the first vane.

Methods and devices for a self-contained device including a hydraulic motor and a hydraulic pump. Preferably, the motor is incorporated either within the interior of the pump, on the exterior of the pump, or a combination of the two. The pump increases the kinetic energy of the fluid by centrifugal means, and in some embodiments is a viscous impeller pump. Applications include building flow systems, industrial processes, and biological circulatory systems.

A fluid pump includes a fluid pump inlet and a fluid pump outlet. A motor includes an armature and a stator such that the armature rotates about an axis. A pump section includes a pump section having a pumping element coupled to the armature such that rotation of the armature rotates the pumping element such that the pumping element pumps fluid from the fluid inlet to a pump section outlet of the pump section. A fluid passage within the fluid pump provides fluid communication from the pump section outlet to the fluid pump outlet such that the armature in part defines the fluid passage. The armature includes blades arranged in a polar array centered about the axis such that each of the blades extends in a helix about the axis and such that the blades define chambers. The chambers are in constant fluid communication with the pump section outlet.

A double-sided impeller with a dual intake fluid housing apparatus is designed to suction an extraneous fluid through both a first intake and a second intake, where gases trapped in the fluid housing may escape and mitigate cavitation. The apparatus includes a fluid impeller, a fluid housing, an output volute, and a shaft. The fluid impeller is double-sided with a first plurality of blades and a second plurality of blades respectively adjacent to the first intake and the second intake. The fluid housing surrounds the fluid impeller and in fluid communication with the extraneous fluid. The shaft is rotationally coupled with the fluid impeller such that torque applied to the shaft applies torque to the fluid impeller. The output volute is in fluid communication with the fluid housing and tangentially positioned such that the motion of the extraneous fluid in the fluid housing is directed toward the output volute.

A centrifugal pump includes a housing and an impeller housed in the housing. The impeller has a main plate, a plurality of first blades, and a plurality of second blades. The first blades and the second blades extend radially along the main plate and have the same radial length. Each of the second blades has a low blade part and a high blade part extending radially from a radially outer end of the low blade part. When comparing the first blades and the second blades with each other at an equal distance from a rotational axis of the impeller, a height of the low blade part measured from the main plate is less than a height of each first blade measured from the main plate, and a height of the high blade part measured from the main plate is the same as that the height of each first blade.

A blood pump includes a housing and a rotor within the housing configured to rotate along an axis. The rotor may include a hub, the hub having regions with blades and regions without blades. The regions without blades may have a constant outer diameter and may extend along at least one fourth the length of the hub. The regions with blades may have an increasing outer diameter. Blades may be disposed on a downstream end region of the hub and extend downstream of the hub. Blades may begin approximately halfway along the axial length of a motor stator located about a hub and extend downstream of the motor stator. Blades may have portions that produce axial fluid flow and radial fluid flow with improved flow characteristics.

A thermo-electric cooler pump system includes a liquid pump. The liquid pump comprises an integrated chiller and a heater. The thermo-electric cooler pump system includes a case component. The case component seals a liquid with the thermo-electric cooler pump system so that the liquid does not enter the thermo-electric cooler pump system except by an inlet port and escape the thermo-electric cooler pump system except by an exit port. The system includes a motor component. The motor component is situated outside of the case component. The motor component is not wetted by the liquid. The shaft of the motor component enters the case through a sealed hole. The system includes an impeller component. The impeller component is contained within the case component, wherein the impeller is wetted by the liquid. The impeller component is attached to the shaft such that the motion of motor component is transferred to the impeller component causing it to move. The motion of impeller component causes the liquid to enter the inlet port and flow toward the exit port. The system includes a chiller/heater component.

A system having a variable diameter impeller device that is operable for reducing an energy consumption of a rotating fluid or gas pump by increasing said impeller diameter as a speed of said rotating fluid or gas pump increases and decreasing said impeller diameter as the speed decreases. An extendable vane mechanism is configured to move along an elongated curved or sloping slot, said movement along said elongated curved or sloping slot is operable for increasing and decreasing a diameter of said impeller device. A spring mechanism having a first end and a second end extends and retracts to dynamically increase or decrease a diameter of the impeller device.