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: 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 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: 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 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: 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 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: 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.

Abstract: A pump drive device includes a box body and at least one drive pump. A liquid-phase zone module is arranged in the box body, and the drive pump is arranged in the liquid-phase zone module. A pump drive device liquid inlet, a pump drive device liquid outlet, a liquid supply port, and an exhaust port are arranged on the box body and are located outside the liquid-phase zone module. The drive pump is connected to the pump drive device liquid outlet through a delivery pipe. The pump drive device has a simple structure and a reasonable design. The pump drive device integrates driving, pressure stabilization, exhaust, cavitation prevention, liquid-level monitoring and warning, pressure monitoring and warning, temperature monitoring and warning, medium purification, and other functions, which achieves an integration, miniaturization, and lightweight design, well matches the application of liquid cooling system products in various industries.

Abstract: A thermal control system includes a closed loop arranged to carry a circulating fluid. There is at least a first heat exchanger and a flow unit in the closed loop. The flow unit includes a first electrode and a second electrode offset from the first electrode in a downstream direction of a flow of the circulating fluid. The first electrode and the second electrode are connectable to a voltage source. The first electrode is formed as a grid structure and arranged to allow the circulating fluid to flow through the first electrode.

Abstract: In accordance with presently disclosed embodiments, a hybrid drive system that uses multiple sources of mechanical energy to drive a pump is provided. The hybrid drive system may include a first mover for generating first mechanical energy, a pump, a drivetrain for providing first mechanical energy from the first mover to the pump, and a second mover within the drivetrain to generate and provide second mechanical energy to the pump. The multiple sources of mechanical energy may provide flexibility with respect to system design and allow for alternative sources of fuel and energy to be used to drive pumping systems. This may reduce the total diesel fuel consumption necessary to perform a well stimulation operation as well as provide for configurations in which diesel engines may be excluded from the pumping process in favor of alternative energy sources that typically do not have sufficient torque capacity to power a pump.

Abstract: A system for maintaining a prime of a pump includes a suction line, a discharge line, a pump line, a bypass line, and a pressure tank connected to the bypass line. The pump line includes a pump, an inlet in communication with the suction line, and a discharge in communication with the discharge line. The pump is operable to propel fluid from the suction line to the discharge line through the pump line. The bypass line extends from the suction line to the discharge line. The bypass line includes a control valve operable to selectively permit fluid to flow through the bypass line from the discharge line to the suction line.

Abstract: A battery powered fluid sprayer includes a shelter that the battery is mounted in to provide power to the electric components of the sprayer. The shelter protects the battery from falling fluid droplets. The shelter extends above the battery and projects outward laterally and longitudinally to protect the battery. The battery can move vertically downward to dismount from the fluid sprayer.

Abstract: A pump having a piston (1) sliding in a body (3) having a chamber (5) between an inlet valve (11) and an outlet valve (12), an outlet valve element sliding during actuation in the chamber (5), and a passage (40) wherein, at end of actuation, the outlet valve element (39) cooperates in a non-sealing manner with the passage to open the outlet valve. The inlet valve has an inlet valve element (10) that slides after closure in a sleeve (9) with reduced diameter and a spring (20) bearing on the inlet valve element and on a bottom of the sleeve. The spring (20) returns the piston into its rest position. The sleeve (9) has an inner diameter of less than 4.2 mm. The spring (20) has a force of at least 20 N, so that the pump delivers the fluid product at a pressure (P) of at least 15 bars.

Abstract: A pump injection arrangement can inject a medium at least one process position into a high-pressure process, in particular at least two different pressure levels. The pump injection arrangement includes injection pump apparatuses for the medium and a regulating unit coupled to the injection pump apparatuses and configured for regulating the injection by at least two of the injection pump apparatuses. The pump injection arrangement is configured for synchronized regulation of the injection pump apparatuses with dependence on one another. At least two of the synchronously regulated injection pump apparatuses are double acting bidirectionally operating high-pressure pumps that are functionally coupled with at least single redundancy to the regulating unit such that pressure can be generated via at least two shafts and the pressurized medium can be made available for injection via a joint high-pressure conduit. In this way, advantageous pressure and pumping characteristics can be achieved.

Abstract: A fluid supply system includes a fluid delivery system including a pump, a sensor configured to acquire data regarding the fluid delivery system, and a processing circuit coupled to the sensor. The processing circuit is configured to determine a health level of the fluid delivery system based on the data and provide a notification in response to the health level not satisfying a threshold.

Abstract: A reciprocating-piston machine, in particular a two-stage or multi-stage piston compressor, includes: a first connecting rod for deflecting a first piston and which has a connecting-rod eye, the first connecting rod being a drive connecting rod; a second connecting rod for deflecting a second piston and which has at least one further connecting-rod eye, the second connecting rod being a follower connecting rod; a coupling element which extends through the connecting-rod eye and the at least one further connecting-rod eye and about which the first connecting rod and the second connecting rod are rotationally movable relative to one another; a coupling bearing element arranged between the coupling element and a connecting-rod eye inner surface of the connecting-rod eye; and a damping element with elastic damping action arranged in a damping annular chamber between the coupling bearing element and the connecting-rod eye inner surface of the connecting-rod eye.

Abstract: This pump comprises: a housing; a second cover coupled to the housing; a stator disposed inside the housing; a pump gear disposed so as to correspond to the stator; and magnets disposed on the pump gear, wherein the pump gear comprises a first guide part protruding towards the second cover, and the second cover comprises a guide groove into which the first guide part is inserted.