Abstract: A method of measuring fluid flow in a system includes providing a fluid supply assembly which includes a fluid supply supplying fluid, a dispensing valve from which the fluid is dispensed, a dispensing line connecting the fluid supply to the dispensing valve, a gear pump including a motor and a gear being rotated by the motor to provide a flow of fluid from the fluid supply to the dispensing line, a revolution counter counting a number of revolutions of an element of the gear pump, a pressure transducer coupled to the dispensing line sensing pressure in the system, and a controller including a processor and a memory to control the system. The method further includes directing fluid from the fluid supply, rotating the gear to provide the flow of fluid from the fluid supply to the dispensing line, and providing a calibration process by modulating the gear pump.

Abstract: A portable fan includes a housing body, a fan assembly, a power supply assembly and a first clamping device. The housing body is provided with an accommodating chamber, an air inlet, and an air outlet; the air outlet, at least part of the accommodating chamber and the air inlet are communicated to each other in sequence along a first preset direction. The fan assembly is located within the accommodating chamber and between the air inlet and the air outlet, and is configured to drive an air flow to flow from the air inlet to the air outlet. The power supply assembly is located within the accommodating chamber, the power supply assembly is offset from a projection of the fan assembly along the first preset direction, and the power supply assembly is electrically connected to the fan assembly to supply power to the fan assembly.

Abstract: A linear compressor includes a shell and a frame disposed in the shell, where the frame includes a body portion and a flange portion extending in a radial direction from a front of the body portion. The linear compressor further includes a cylinder coupled to an inside of the body portion, a piston disposed in the cylinder and configured to reciprocate axially, a drive unit coupled to a rear surface of the flange portion, a stator cover coupled to a rear surface of the drive unit, and a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover.

Abstract: A pump housing having a suction chamber and a discharge chamber. A partition wall dividing the suction chamber and the discharge chamber, and having a communication hole formed at a center thereof for allowing the suction chamber to communicate with the discharge chamber. An impact body disposed toward a suction part so as to come into contact with fluid introduced into the suction chamber through the suction passage; and a gas discharge part disposed at an upper portion of a circumferential surface of the housing and communicating with an outside so that gas, separated from the fluid in contact with the impact body, is discharged. The suction part extends in one direction perpendicular to a virtual center line passing through the housing, and the impact body is disposed in a direction opposite to an extending direction of the suction part with respect to the virtual center line.

Abstract: A controllable pump system can include an inlet line and a pressure controlled pump connected to the inlet line to receive input flow. The pressure controlled pump can have a pressure controlled pump state configured to control a pump output to an output line connected to the pressure controlled pump. The system can include a slew pump connected to the inlet line and configured to output a slew pump pressure, and a slew pressure valve connected to the input line and to a second line and configured to output a control pressure to the pressure controlled pump. The second line can be configured to be in fluid communication with at least the slew pump such that the slew pressure valve can receive the slew pump pressure.

Abstract: A pump assembly includes a diaphragm pump having a diaphragm extending across a chamber to define a gas chamber on a first side of the diaphragm and a mixture receiving chamber on a second, opposite side of the diaphragm. A shaft extends through the diaphragm and moves therewith between a default position and an extended position. The mixture receiving chamber is configured to receive liquid mixture via a mixture inlet and pass mixture to a pressure chamber via a mixture outlet. The gas chamber has an inlet port receiving gas of a desired pressure and an outlet port. The shaft seals between the inlet port and the outlet port until the diaphragm and shaft are in the extended position at which time gas in the gas chamber passes from the gas chamber to the pressure chamber. The pressure chamber has a pressure outlet configured to deliver a pressurized liquid mixture and gas to a freezing chamber.

Abstract: A sump pump system may implement adaptive learning and machine learning techniques to facilitate improved control of sump pumps. A sump pump system may implement the described techniques to generate, train, and/or implement a machine learning model that is capable of predicting or estimating one or more conditions of the sump pump system (e.g., water level in the basin, motor malfunction, stuck impeller, geyser effect, blocked outlet pipe, faulty level sensor/switch, faulty bearing, failure to engage pump at high-water mark, etc.) based on one or more detected input variables (e.g., acceleration or vibration patterns detected in water, on a pump, or on a pipe; capacitance values of water; audio signatures; electrical signatures, such as power or current draw; pump motor rotation speed; water pressure signatures or values, such as those detected at the bottom of a sump basin; etc.).

Abstract: A method for controlling a gear pump by a control device to compensate a tooth engagement-induced volume flow pulsation to reduce noise emissions. The method includes acquiring a gear angle and an actual speed of the gear pump; keeping a relationship between a respective modulation angle and an amplitude of a pilot control torque of the gear pump to compensate the volume flow pulsation to an actual speed; modulating the pilot control torque on the basis of the acquired gear angle, a predetermined correction angle, the modulation angle, a number of teeth of the gear pump and the amplitude; and driving the gear pump with a drive torque overlaid with the modulated pilot control torque. The modulation angle is calculated using a PT element with the actual speed as the input variable.

Abstract: A pump assembly includes a pneumatic pump with a pump body having a discharge passage. The pump is operable to discharge compressed air through the discharge passage. The pump assembly also includes a cap adjacent the pump body and at least partially enclosing a first volume in communication with the discharge passage, and a casing at least partially surrounding the pump. The pump assembly further includes a second volume defined between the casing and the cap, the second volume in fluid communication with the first volume via an opening in the cap, and a casing outlet in fluid communication with the second volume. The pump assembly is configured such that the compressed air flows through the first volume and the second volume before being discharged from the casing through the casing outlet.

Abstract: A longitudinal stretching based wave pumping system and corresponding methods. A stretchable tube is configured to hold a fluid. An actuator is coupled to the tube. The actuator is configured to longitudinally stretch and release the stretchable tube to create waves on the stretchable tube and within the fluid that propagate and reflect at one or more reflection sites along the stretchable tube to create wave pumping, which drives the fluid and generates net flow in a flow direction.

Abstract: A vacuum system has a condenser and a root vacuum pump set, wherein the condenser is an independent inlet condenser set connected to a generator including an air cooling power generator condenser. A pressure sensor is installed on the independent inlet condenser set for detecting a first input pressure. Air outputted from the independent inlet condenser set is compressed by the root vacuum pump set. A backing pump receives an air outputted from the root vacuum pump set through an output pipe. A bypass pipe is connected between an output end of the root vacuum pump set and a vapor-liquid separator connected to the backing pump. A central controller serves to receive the first input pressure and determine to control the air from the root vacuum pump set to be outputted to the output pipe or the bypass pipe by a control valve.

Abstract: A flexible impeller pump designed for use in dispensing a flowable food product includes a cover, impeller assembly and a pump body that are assembled to create the pump without other separate components. The components can be permanently connected to each other to create a disposable pump or can be disassembled for cleaning and reuse. The impeller assembly includes an impeller shaft and a flexible impeller molded over the impeller shaft to prevent separation. The impeller assembly is received within the pump body and the cover is secured to the pump body. The cover includes a seal that is molded over the pump body to prevent separation of the seal from the cover. The impeller shaft extends through the pump body and is coupled to a drive shaft of an electric motor that is operable to drive the impeller pump.

Abstract: Embodiments of the invention provide a pump assembly for a hydraulic tool. The pump assembly can include a reciprocating element that is configured to move between a retracted position and an extended position, a cam surface in the reciprocating element that can engage cam followers, a rotating element that can receive rotational input, and a base that can at least partially surrounds the rotating element. Movement of the cam followers along the cam surface can move the reciprocating element from the retracted position to the extended position.

Abstract: A hydraulic pump includes a work port configured to supply fluid to a hydraulic tool. A high-flow piston supplies fluid along a first flow path to the work port and plurality of high-pressure pistons supplies fluid along a second flow path to the work port. An unloading valve is positioned along the first flow path and actuates from an open state to a closed state when a pressure level of the fluid in the second flow path exceeds a first threshold pressure. A controller allows a user to select a mode of operation. The controller sets a second threshold pressure of the hydraulic pump based on the selected mode of operation, and the second threshold pressure corresponds to an end operation of the hydraulic tool.

Abstract: A tool includes a core ring including a first end and an opposing second end. An opening is defined through the first and second ends. The core ring includes a first radial engagement component. The tool also includes a pin including a shaft having first and second sides. The first side of the shaft is disposed at least adjacent the opening of the core ring. The pin further comprises a second radial engagement component configured to engage with the first radial engagement component of the core ring. The second side of the shaft extends axially outwardly from the second end of the core ring. The tool also includes a sleeve connected to the core ring. The first side of the shaft of the pin is slidable with respect to the sleeve. At least a portion of the sleeve extends axially outwardly from the first side of the core ring.

Abstract: In some embodiments, electrochemical actuators include a sealed electrolytic chamber with two or more electrodes disposed therein and associated reservoirs. In some embodiments, the electrochemical actuators include one or more rigid structures that are overmolded onto one or more electrodes to form the electrolytic chambers. In some embodiments, multiple rigid structures that are overmolded onto two separate electrodes may be connected to form one or more electrolytic chambers with a desired configuration of electrodes contained therein. In some embodiments, manufacturing methods and structures relate to the formation of an array of electrochemical actuators.

Abstract: A fluid transportation system and method use a negative pressure driving mode to absorb fluids from a fluid storage assembly and a positive pressure driving mode to load the absorbed fluids into the fluid-using system. At least two working modules are used to transport fluids to the fluid-using system, the process of transporting fluid in each working module being divided into the processes of absorbing fluids into a fluid transfer assembly, and loading fluids into a fluid transfer assembly. The process of absorbing fluids in each working module and the processes of absorbing fluids and/or loading fluids in any other working module overlap at least partially along the time axis. With the present disclosure, the accuracy and speed of fluids transportation are improved, a device utilizing the system and method is also disclosed.

Abstract: A fluid routing plug for use with a fluid end section. The fluid end section being one of a plurality of fluid end sections making up a fluid end side of a high pressure pump. The fluid routing plug is installed within a horizontal bore formed in a fluid end section and is configured to route fluid between an intake and discharge bore. The fluid routing plug comprises a plurality of first and second fluid passages. The first and second passages do not intersect and are offset from one another. The first fluid passages are configured to direct fluid delivered to the horizontal bore from intake bores towards a reciprocating plunger. The second fluid passages are configured to direct fluid pressurized by the plunger towards a discharge bore.

Abstract: Pump body assembly, fluid machinery, and a heat exchange device. The pump body assembly includes: an upper flange; a lower flange; a cylinder arranged between the upper flange and the lower flange; a sliding block structure, rotatably arranged inside the cylinder, where the sliding block structure includes a connecting portion and two sliding sub-blocks arranged on the connecting portion, and the two sliding sub-blocks and an inner wall surface of the cylinder form a first sliding hole; a piston, slidably arranged inside the first sliding hole, where a variable volume cavity is formed between the piston and an inner wall of the cylinder, and the piston has a second sliding hole; and a rotation shaft, where at least a portion of the rotation shaft is slidably arranged inside the second sliding hole.

Abstract: An automotive cooling fan assembly includes fan driven by a motor. The motor supported by a motor support structure of a shroud. The motor support structure includes a motor carrier and support arms extend radially outward from an outer surface of the motor carrier. The fan includes a central hub and blades that extend radially outward from the side of the hub. An axial operating gap is disposed between an end of the hub and the motor support structure. The motor support structure includes a protrusion that protrudes axially into the operating gap and serves to govern an extent of deflection of the fan during a water fording event.