Abstract: A pump shaft for a multi-stage pump, in particular a centrifugal pump, includes a peripheral groove region for the engagement of a relief device in order to introduce a force acting in the axial direction of the pump shaft. The groove region includes a plurality of grooves which are spaced apart in the axial direction.

Abstract: A vacuum pump and a vacuum pump rotor blade that can effectively limit deposition of reaction products are provided. The vacuum pump includes a rotating shaft held rotationally, a drive mechanism for the rotating shaft, a first rotor blade made of a first material, a second rotor blade made of a second material having higher heat resistance than the first material, and disposed further toward a downstream side than the first rotor blade, and a casing enclosing the rotating shaft, the first rotor blade, and the second rotor blade. The second rotor blade is disposed, via a heat insulating portion, on the first rotor blade.

Abstract: A connecting structure, an exhaust silencer, a silencer and a compressor are provided. The connecting structure has a connecting housing and an exhaust pipe assembly. The connecting housing has a silencing chamber and a sealing portion. One end of the exhaust pipe assembly passes through the sealing portion and extends into the silencing chamber. Another end of the exhaust pipe assembly is arranged outside the connecting housing. Thus, the silencing chamber is in communication with an outside space of the connecting housing through the exhaust pipe assembly.

Abstract: A method is provided for controlling a pump driven by a motor with the motor connected to a drive. The method can include determining a parameter value related to a fault condition, comparing the parameter value to a threshold value, and adjusting a speed control of the drive based on the comparison of the determined parameter to the threshold value.

Abstract: An electrical machine includes an open-loop or closed-loop control unit and a fluidic actuator, wherein the open-loop or closed-loop control unit is established for open-loop or closed-loop control of the actuator, where the open-loop or closed-loop control unit has a carrier plate cast in a thermally conductive casting compound, and where the open-loop or closed-loop control unit makes contact with a fluid-filled chamber of the actuator in the region of the casting compound such that it becomes possible to dispense with separate cooling devices in the open-loop or closed-loop control unit.

Abstract: An electrical fan having various supplies of electricity includes: a housing; a motor securely fixed in an interior of the housing to generate rotating power; an impeller located in the interior of the housing and connected to the motor to be driven by the motor to rotate; a circuit board arranged in the interior of the housing and electrically connected with the motor and including a boost circuit; an electricity supply hole arranged on the housing and electrically connected with the circuit board to provide a USB-C power supply that is provided from outside; a dry battery box arranged in the housing and electrically connected with the circuit board to accommodate therein a plurality of dry batteries that provide a 9V dry-battery power supply; and a control switch arranged on the housing to serve as a user control interface.

Abstract: The invention comprises a pumping apparatus, system and method for increasing the flow of the in a first direction to boost liquid flow and in a reverse second direction to remove blockages and/or self-clearing, with operation having an rotor/impeller that can use a shredder and/or shearing action utilizing blades for processing to pass solids, debris and other things to prevent clogging and/or self-cleaning of the unit.

Abstract: A high-pressure pump includes a valve member that allows or blocks a flow of fuel to a pressure chamber. A needle is reciprocable inside a cylinder member. One end of the needle facing the pressure chamber is provided with the valve member. Another end of the needle is provided with a movable core that faces a fixed core in an axial direction of the needle. The high-pressure pump includes a coil assembly that includes a coil, a terminal connected to the coil, and first and second yokes that form a magnetic circuit on both sides of the coil in the axial direction. The coil assembly is between a first connection portion and a second connection portion. The first connection portion connects the coil assembly and the fixed core. The second connection portion connects the coil assembly and the cylinder member.

Abstract: A pump arrangement for conveying a liquid, in particular for conveying waste water or service water, includes a pump housing and an impeller rotatably arranged in the pump housing about a rotation axis for conveying the liquid. At least one sensor, in particular a 3D sensor, is present for detecting a surface of the impeller to sense an extent of build-up on the impeller. The at least one sensor is arranged on and/or in the pump housing.

Abstract: The present invention concerns a hydraulic pressure amplifier device comprising a casing (10) having two chambers (12, 14) of different cross-sections which house a staged piston (20) comprising two piston sections (22, 24) with cross-sections respectively el matching the chambers (12, 14), and means (30) for controlling the movement of the piston (20), characterised by the fact that the control means (30) are formed of an electronic control driven by means for estimating the ends-of-stroke of the piston (20) without an end-of-stroke sensor or mechanical stop.

Abstract: To provide a drainage pump capable of reducing the amount of drain water remaining in a drain pan. A drainage pump includes a housing, an impeller housed in the housing, and a motor with a drive shaft connected to the impeller. The housing includes a suction pipe in a cylindrical shape extending in an up-and-down direction. A suction port facing downward and a concave surface in an annular shape around the suction port are disposed at a lower end of the suction pipe.

Abstract: A compressor system can include a lubricant injection system useful to supply lubricant to an airend. The compressor system can include a variable lubricant flow valve which can be regulated by a controller on the basis of operating conditions of the compressor system. In one form the compressor system also includes an oil separator and/or an oil cooler with or without a thermal control valve. The controller can have one or more modes of operation, including a mode in which the controller regulates the flow of lubricant to the airend to increase an internal flow area of the valve when the airend is operated at an unloaded or loaded condition. In some forms the controller can regulate the lubricant flow valve and/or the thermal control valve and/or the lubricant cooler.

Abstract: An impeller connected to a motor having a drive shaft includes a back plate having a boss having a shaft hole through which the drive shaft is inserted, a ring-shaped rim provided to face the back plate, and a plurality of blades connected to the back plate and the rim and arranged along a circumferential direction of the back plate about the rotation shaft. The back plate includes a first surface portion on which the plurality of blades are formed, a second surface portion provided at a region between the boss and the first surface portion and depressed from the first surface portion in an axial direction of the rotation shaft, and a plurality of projections provided at the second surface portion and extending in the axial direction.

Abstract: A stick pump assembly includes a tube having a first end, a second end, and an axis extending through the first and second ends. The tube accommodates fluid to flow therethrough. The stick pump assembly also includes a pump including a motor and an impeller. The pump has an inlet adjacent the first end and in fluid communication with the tube. The stick pump assembly further includes a handle having an outlet adjacent the second end and in fluid communication with the tube. The handle includes a receptacle configured to receive a battery pack. The stick pump assembly also includes a filter assembly supported by the pump and in fluid communication with the inlet. Fluid flows into the stick pump assembly though the inlet, around the motor, through the tube, and out of the stick pump assembly through the outlet.

Abstract: An electric submersible pump (ESP) assembly. The ESP assembly comprises a centrifugal pump, an electric motor mechanically coupled by a drive shaft to the centrifugal pump, wherein the electric motor comprises a stator and a rotor, a bearing, wherein the bearing is disposed inside the electric motor, and a magnetic shield disposed in the electric motor between bearing and the rotor and stator.

Abstract: The present application relates to a sealing soft water recovery apparatus for a vacuum pump in a vacuum pressure swing adsorption oxygen generation system, including a water tank, a wet Roots vacuum pump, a steam-water separator, and a collecting sink which are sequentially connected, where the collecting sink is connected to the water tank by a delivery tube provided with a delivery pump; and the water tank is connected to the wet Roots vacuum pump by a water inlet tube provided with a solenoid valve for controlling the opening and closing of a water channel. The present application has the effects of recovering sealing soft water and saving resources.

Abstract: An all-polymer reciprocating pump (100) is contemplated. The pump body (160) receives a sliding insert (170) that may be locked in a down position to minimize the extension and profile of the actuator (120) while the pump (100) is not in use (e.g., for purposes of shipping in e-commerce). Projections (171) slide within guides (181) formed on an insert housing (180). Even in this down locked position, minimal compression is applied to the biasing members (130) so as to avoid fatigue, wear, and/or failure of the plastic components.

Abstract: The present invention provides a pump assembly for use in a household appliance comprising a pump, an electric motor having a rotor and a stator and a heat exchanger arranged to be in thermal contact with at least a portion of the stator. There is further provided a heat recovery system for use in a household appliance comprising a main fluid circuit, a fluid reservoir, a heat exchange circuit and a pump assembly for pumping working fluid through the main fluid circuit. The pump assembly comprises an electric motor, a heat exchanger provided in thermal contact with at least a portion of the electric motor, the heat exchanger being configured to transfer heat from the electric motor to a liquid coolant circulating in the heat exchange circuit.

Abstract: A liquid feeding pump is disclosed, including: a pump housing defining a hydraulic chamber, and a water inlet portion and a water outlet portion allowing a first liquid to enter or to be discharged from the hydraulic chamber; a pump chamber member defining a pump chamber isolated from the hydraulic chamber, the pump chamber member being movable between a first configuration in which the pump chamber has a first volume and a second configuration in which the pump chamber has a second volume; a liquid inlet portion and a liquid outlet portion allowing a second liquid to enter or to be discharged from the pump chamber; wherein, the liquid feeding pump is configured such that the first liquid entering the hydraulic chamber via the water inlet portion can urge the pump chamber member towards its second configuration, thereby pumping the second liquid out of the pump chamber.

Abstract: An electric submersible pumping system includes a motor, a pump driven by the motor, and a cable that provides electrical power to the motor. The cable includes a conductor and an insulator surrounding the conductor. The insulator includes a first layer surrounding the conductor and a second layer surrounding the first layer. The insulator may include an H2S scavenger and an H2S reactant in the first or second layers surrounding the conductor. The cable optionally includes a sub-insulator layer that includes a metal or nitride coating applied directly to the conductor.