A pump includes an axial inducer. The axial inducer includes a housing that has an internal surface that defines an axial fluid passage. A rotor is disposed about a central axis in the fluid passage. The rotor includes at least one blade that defines at least one blade tip. The internal surface of the housing defines a plurality of grooves adjacent the at least one blade tip. The grooves are elongated in a circumferential direction.

A fuel pump arrangement including a housing and an impeller located within the housing configured for receiving cold fuel through an inlet of the housing, wherein the impeller includes a series of vanes for drawing fluid and a nose cone defining an axis, wherein the nose cone includes a channel therethrough for passing warm fuel to an exterior surface of the nose cone for mixing with the cold fuel.

A surface pumping system has a motor and a pump driven by the motor. The pump has a discharge on a first end of the pump, a suction end on a second end of the pump, and a plurality of stages between the suction end and the discharge. Each of the plurality of stages includes an impeller and a diffuser that encases the impeller. Each diffuser is an independent pressure vessel. In some embodiments, the diffuser and impeller in each stage are large and configured for use in low net positive suction head (NPSH) applications.

The present invention relates to an impeller for an electric water pump capable of preventing a cavitation from occurring in the impeller according to the related art and improving a flow restriction in the impeller by changing an internal structure of the impeller in consideration of a flow of a coolant introduced into the impeller. The impeller for an electric water pump, includes: an inlet member formed in a pipe shape extending to allow a fluid to be introduced; an upper member connected to one end of the inlet member, extending to one side, and having an inner diameter increasing toward the one side; an extension member outwardly extending from one end of the upper member; and a lower impeller member coupled to an upper impeller member formed by the inlet member, the upper member, and the extension member to form a discharge space from which the fluid is discharged.

The invention relates to a canned motor pump (P1) comprising: a housing (10) including a body (11) and a motor casing (12); an electric motor (20) including a stator (30) and a rotor (40) arranged in the motor casing (12); a shaft (50), extending along a central axis (X1), secured with the rotor (40) to rotate therewith about the central axis (X1), and having a front end (52) located outside the motor casing (12), in the body (11) of the housing (10); and a wheel (60) located at the front end (52) of the shaft (50), secured with the shaft (50) to rotate therewith about the central axis (X1) and having a hydraulic profile suitable for moving a fluid (F) in the body (11). The rotor (40), the shaft (50) and the wheel (60) form a rotary assembly (ER1). Within the rotary assembly (ER1), only the shaft (50) is supported by one or more bearings (80), thereby guiding the rotary assembly (ER1) in rotation. The motor pump (P1) is characterized in that the shaft (50) and the wheel (60) form, at least partially, a single-piece part (70). A method for manufacturing such a motor pump (P1) is also described.

A self-priming pump is described that has a housing, an inlet, and an outlet. A first impeller has a first pump section that is arranged in a first chamber, and a second impeller has a second pump section that is arranged in a second chamber. A shaft section is provided between the pump sections, and has a shaft end and penetrates an opening in a housing wall. To improve the net positive section head of the pump, the shaft section between a constriction and the shaft end is formed to taper from the shaft end toward the constriction, and the first impeller and shaft section between the constriction and first pump section has a smooth contour.

An open water pump comprises an upper casing, a lower casing, an impeller having a central shaft and a plurality of blades. Each blade has an upper portion and a lower portion. The upper casing has an upper chamber, the lower casing has a lower chamber. A plurality of inlets attached below and to a side of the lower casing, and a plurality of outlets attached to a side of the upper casing. At least the bottom portion of the lower portion of each blade which attached to the shaft gradually bends along a rotation direction of the impeller, and a ratio of a height of the lower portion of each blade to a height of the upper portion is between 1 and 5. The impeller can be allowed to draw water at a low water level, foam formed by washing liquid or food debris on the surface of water can be less likely to get into the impeller to influence the drawing of water, a sufficient amount of water can be drawn from the water inlets.

A fuel pump includes a cartridge removably received within a canister. The cartridge includes a motor assembly, and a pump assembly that includes a centrifugal pumping element and outlet porting from the centrifugal pumping element. The motor drives the centrifugal pumping element to generate a flow of fluid through a main flow pathway between a pump inlet and outlet through the outlet porting of the pump assembly. The cartridge further includes a pressure relief valve that is movable between a closed position and an open position, and defines a pressure relief flow pathway integrally within the cartridge from the outlet porting to inlet porting of the centrifugal pumping element. When pressure within the pump assembly exceeds a threshold pressure, the pressure relief valve moves from the closed position to the open position to permit a relief flow of fluid through the relief flow pathway. The fuel pump may be employed as part of an aircraft fuel system.

A centrifugal pump includes a motor with a shaft and an adapter mounted to the motor. A volute housing mounted to the adapter defines a volute chamber. The adapter and volute housing define a pumping chamber therebetween. The volute housing includes an impeller inlet wall having an orifice. An impeller is disposed within the pumping chamber and a hub of the impeller is mounted on the shaft while a shroud portion coincides with the impeller orifice. An inducer is coupled to the shaft and extends into the inlet dogleg. A first portion of the inducer resides within the shroud portion of the impeller and a second portion of the inducer resides within the inlet orifice. The inducer includes helical blades whereby, upon rotation of the shaft, a fluid within the inlet dogleg is acted upon by the helical blades of the inducer before the fluid enters the impeller shroud portion.

A strain estimation device according to an aspect of the present disclosure is a strain estimation device that estimates strain of a component provided in a fluid and includes a pressure acquisition unit that acquires a pressure signal including time-series pressure values at a predetermined position in a vicinity of the component, an estimation unit that estimates, based on the pressure signal, a strain signal including time-series strain values occurring at the component, and an output unit that outputs the strain signal. The estimation unit converts the pressure signal into the strain signal using an estimation filter determined based on a power spectral density of pressure and a power spectral density of strain occurring at the component when the pressure is applied to the position.