Abstract: A hermetic compressor includes: a cylinder including a compression chamber, an injection vertical hole, and a communicating part, and closing parts fixed to both end surfaces of the cylinder in the height direction to close the compression chamber, wherein the closing part that is fixed to one end surface of the cylinder has a discharge port through which the refrigerant compressed is discharged to the outside of the compression chamber and, in a plan view, a straight line connecting a center of the injection vertical hole and a center of a boundary part between the communicating part and an inner periphery of the cylinder passes through a region obtained by projecting the discharge port in the height direction of the cylinder.

Abstract: In some embodiments, a fluid-flow system comprises an internal magnetic array coupled to at least one set of rotor blades. The internal magnetic array comprises magnets arranged to provide alternating polarity around its periphery. The system may further comprise at least one external magnet. The internal magnetic array and the at least one external magnet are arranged such that actuation of one magnetically induces actuation of the other. In some embodiments, actuation of the at least one external magnet induces, though magnetic coupling, rotation of the internal magnetic array, thereby causing rotation of the at least one set of rotor blades to drive a fluid flow. In some embodiments, a fluid flow through the at least one set of rotor blades induces rotation of the internal magnetic array and actuation of the at least one external magnet. In other embodiments, a step-up or step-down system is provided by magnetic coupling.

Abstract: A method for operating a linear compressor of an appliance includes operating a motor of the linear compressor in order to drive a rotor of the motor. The method also includes obtaining, via a controller of the linear compressor, a current feedback measurement of the motor. Further, the method includes determining, via the controller, one or more phasor parameters of a piston velocity based, at least in part, on the current feedback measurement. In addition, the method includes, based, at least in part, on the one or more phasor parameters of the piston velocity, controlling, via the controller, the motor of the linear compressor using a single-phase vector-like control scheme.

Abstract: The invention relates to a vertical turbine pump having a riser pipe extending along an axis, a motor shaft arranged in the riser pipe, an elbow housing with an elbow arranged therein and connected on a pressure side to the riser pipe, a lantern housing arranged on the elbow housing and accommodating the motor shaft, and a motor arranged on the lantern housing and driving the motor shaft, wherein the elbow housing and/or the lantern housing is formed mould-free and has a rectangular cross section.

Abstract: An electric compressor includes a rotary shaft and a housing having a motor chamber and a suction passage. In an axial view of the rotary shaft, a second imaginary line intersects an inner peripheral surface of the housing at a first intersection point. A third imaginary line intersects the inner peripheral surface of the housing at a second intersection point. A fourth imaginary line passes through the first and second intersection points located below an axis of the rotary shaft in a vertical direction. A part of the motor chamber below the fourth imaginary line in the vertical direction and surrounded by the inner peripheral surface of the housing and the fourth imaginary line serves as a reservoir. The reservoir stores a refrigerant liquified in the motor chamber while restricting the refrigerant liquified from being introduced into a compression chamber from the motor chamber through the suction passage.

Abstract: A stator assembly for an ESP. The assembly can include stators with tabs and corresponding slots that prevent rotation of the stators during use in downhole activities.

Abstract: Reciprocating pump seal devices, systems, and methods are disclosed. A pump system comprises first and second assemblies. The first assembly includes a housing, suction and discharge nozzles coupled to the housing, and an actuator apparatus contained within the housing and configured to drive flow of a substance from the suction nozzle to the discharge nozzle. The actuator apparatus includes a first section with a first notch, a second section coupled to the first section and including a second notch, and a seal clamped between the first and second sections via the first and second notches. The seal is configured such that leakage of the substance around a perimeter of the actuator apparatus is mitigated and/or prevented when the seal is clamped between the first and second sections and when the pump is operating. The second assembly includes a piston that drives reciprocating motion of the actuator apparatus.

Abstract: Provided are a fan casing, a blower assembly, and a vehicle air conditioning system, relating to the field of fan technology. The fan casing includes a mounting shell, a heat dissipation member, and a damping assembly. The mounting shell is provided with multiple limiting grooves and a mounting space for holding a stator-rotor assembly. The heat dissipation member includes a heat dissipation plate located inside the mounting shell. The multiple securing portions are disposed at the edge of the heat dissipation plate. The damping assembly includes multiple damping members. The multiple damping members are spaced apart along a first direction. The damping member is disposed in a corresponding limiting groove, and a pocket groove is disposed at the end of the damping member facing the central axis of the mounting shell. Each of the multiple securing portions is limited in a corresponding pocket groove.

Abstract: A refrigerant compressor includes a hermetically encapsulated compressor housing, an electric drive unit including a rotor rotatable about an axis of rotation, a stator, and a crankshaft connected to the rotor in a torque-proof manner, a piston-cylinder unit, a lubricant receptacle for conveying lubricant from a lubricant sump vertically via the crankshaft, wherein the crankshaft is partially arranged in a bush-like section of a compressor block, wherein, viewed in radial directions, an interspace is formed between a second stator section and the compressor block, in which interspace a second rotor section is arranged at least partially, wherein, viewed in the radial directions, a gap is formed between the second rotor section and the compressor block. According to the invention, for the lubricant at least one through-hole is provided in the compressor block between the crankshaft and the gap.

Abstract: An assembly for a diaphragm pump includes: a body defining a plurality of diaphragm chambers spaced apart about a body axis, wherein each diaphragm chamber defines a membrane opening, an inlet chamber in fluid communication with each diaphragm chamber, and an outlet chamber in fluid communication with each diaphragm chamber; and a plurality of flexible membranes that each comprise an outer edge, wherein the body is configured to clamp the outer edge of each membrane along a corresponding membrane opening to seal a corresponding one of the diaphragm chambers; wherein the membranes are configured to deflect substantially in parallel to the body axis to suction fluid into each diaphragm chamber from the inlet chamber and discharge fluid from each diaphragm chamber into the outlet chamber; wherein each membrane comprises a coupling section configured to couple the membrane to a pump drive and arranged along a diaphragm axis that extends in parallel to the body axis, and a deflection section arranged radially outw

Abstract: An extremely compact dry-sump reciprocating compressor comprising an underlying external reservoir in which lubricant is collected by gravity and a positive displacement pump that draws lubricant from said reservoir to feed it into a distribution circuit.

Abstract: A contactless control system for a pump monitoring device provides TEST and SILENCE functionality without penetrating a weather-resistant enclosure. A printed-circuit board within the enclosure carries a planar spiral transmit coil on one face and at least one planar receive coil on the opposite face, arranged to form a coupled resonant metal detector. The coils operate at a frequency, optionally a carrier frequency gated at a lower frequency, with optional ferrite material to increase magnetic field density through the enclosure wall. Two spatially separated receive coils may be wired in opposition to reject common-mode noise. Placement of a metallic object adjacent to the exterior wall produces a proximity signal that toggles the system between test and silence modes. The system is suitable for grinder pumps, septic pumps, and lift stations, and eliminates mechanical switches, enclosure penetrations, and sealing gaskets while reducing installation cost and improving reliability in outdoor environments.

Abstract: A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

Abstract: Radial piston pump and a method of assembly of the radial pump in particular radial piston pump, including a drive shaft having an eccentric and at least one piston-and-working-chamber combination, wherein the piston-and-working-chamber combination comprises a cylinder bore and a piston, wherein the cylinder bore has a fluid outlet duct, the cylinder bore is closed with a cover, wherein the cover is received in a cover receptacle bore, the cylinder bore has a longitudinal axis, and the cover receptacle bore has a longitudinal axis, wherein the longitudinal axis of the cylinder bore and the longitudinal axis of the cover receptacle bore are not congruent, in particular are displaced in parallel.

Abstract: A device for actuating a compressor. The device includes a rocker movable between a first stable state and a second stable state, arranged such that on movement of the rocker a piston in a compressor chamber of variable volume is driven; one or more shape memory alloy (SMA) elements coupled to the rocker, actuatable to change between a first shape and a second shape; at least one temperature control region within which at least one of the shape memory alloy (SMA) elements is arranged, wherein the temperature within the temperature control region is controlled to vary the temperature of the SMA contained therein.

Abstract: A gas inflation device is provided, belonging to the technical field of gas inflation devices. The gas inflation device includes the housing, the heat dissipation chamber, the gas inflation pump, and the heat dissipation fan, wherein the housing is provided with the gas inlet and the gas outlet; the heat dissipation chamber is arranged in the housing, and the heat dissipation chamber is communicated to the gas inlet and the gas outlet respectively; the gas inflation pump is arranged in the heat dissipation chamber; the heat dissipation fan is arranged in the heat dissipation chamber and connected to the gas inflation pump; and the gas inflation pump is configured to drive the heat dissipation fan to rotate, so as to drive the gas flow from the gas inlet to the gas inflation pump and flow out via the gas outlet.

Abstract: A pump assembly includes an axial gap motor including a stator, a motor rotor, and a motor shaft, and a pump including a pump rotor configured to be rotated by the motor rotor and a pump housing configured to house the pump rotor. The stator includes a yoke having an annular shape, and a plurality of teeth disposed on a first surface of the yoke. The pump is disposed in an internal space surrounded by the plurality of teeth. The pump housing has a passage space formed in an interior of the pump housing, and a leak passage opened from the passage space toward the motor rotor.

Abstract: A pump or fluid-powered motor and a flange may include a pump housing defining an inlet and an outlet and internal pump components arranged within the housing and operably coupled to a drive shaft extending out of an end of the housing and defining a longitudinal axis. A pump flange may be arranged on the end of the housing and comprising a generally rectangular plate having a plurality of bolt holes. The pump flange may also include a pilot projection defining a pilot diameter, a torque pin feature, and a through bore with the drive shaft extending therethrough. The plurality of bolt holes may define a rectangular pattern with an X-spacing a Y-spacing. The torque pin feature may be arranged a distance from the longitudinal axis and on the Y-axis, wherein a ratio of the distance to the pilot diameter ranges from approximately 0.50 to approximately 0.70.

Abstract: This disclosure describes a diverter assembly, a valve box, and a plunger pump. The diverter assembly includes a diverter, a first valve body, a second valve body, first valve rubber, and second valve rubber. The diverter includes liquid drainage and inlet holes. The liquid drainage hole is communicated with first and second end surfaces facing away from each other in an axial direction of the diverter, and the liquid inlet hole is communicated with a side surface and the first end surface. The first valve body is configured to block the liquid inlet hole and to communicate a communication hole and the liquid drainage hole. The second valve body is configured to block the liquid drainage hole. The first and second valve rubber is configured to hermetically connect the first valve body and the first end surface, and to seal the second valve body and the second end surface, respectively.

Abstract: A portable gas source (PGS) comprising a housing and a compressor disposed within the housing. The compressor includes a first air inlet, a second air inlet, and an air outlet. The PGS further comprises a compressor dampening system including resilient first and second bellows which are each operatively interposed between the compressor and the housing and adapted to dampen movement of the compressor along multiple axes, with the first and second bellows at least partially defining respective ones of the first and second air inlets, and each fluidly communicating with ambient air. The dampening system also includes, among other structures, resilient first and second side bands which are cooperatively engaged to and extend between the compressor and the housing in opposed relation to each other, each of the first and second side bands likewise being adapted to dampen movement of the compressor along multiple axes.