Abstract: The frame-supported pump is assembled without the use of tools. In place of bolts or threaded connections, an external frame provides the support necessary to resist the internal pressure of the pump. Upper and lower pump housings include grooves that slide into a slotted support or frame—a slip-in mount. In alternative embodiments the grooves are replaced with holes that slide over rods, or other means of external support prevent the pump housings from moving away from each other during pumping. A pin is optionally used to prevent the housings from sliding out of the frame, or friction is sufficient. When the pumps are in service, the internal pressure attempts to push the housings away from each other, but this force is passed to the frame, which responds with a matching force, keeping the housings in place.

Abstract: A piston pump includes: a sleeve housing which is provided with a discharge hole and defines a bore; a piston which has an inlet flow passage for drawing oil into the bore and is reciprocally movably inserted into the bore; an inlet valve which is configured to open/close the inlet flow passage; an outlet valve cover which is coupled to the sleeve housing to surround a portion at which the discharge hole is formed; an outlet valve which is configured to open/close the discharge hole; and a sealing member which is interposed between the sleeve housing and the piston to provide a sealing therebetween. The sealing member is provided with a separation prevention protrusion against which the piston is blocked to prevent a separation of the piston.

Abstract: A water lubrication screw type air compressor includes a compressor, an air-loop system and a water-loop system. The water-loop system includes a water supply device, a first water-loop unit and a second water-loop unit. The water supply device includes a first water-treatment device to modify the water quality and provide purified water. The first water-loop unit includes a second water-treatment device to modify water quality and reduce the corrosion of metal components. The second water-loop unit includes a water filter to remove the impurities in water and maintain the purity of cycling water. Therefore, the water-loop system in the present disclosure includes multiple water-treatment devices and filters to maintain the water quality. The purified water ensures better cooling, lubrication and air proofing when injected into the compressor.

Abstract: The present invention provides a high-pressure pump. The high-pressure pump comprises a motor assembly, a gear assembly, a plunger assembly, a pump head assembly and a water inlet and outlet valve assembly. The motor assembly comprises a motor and a dual-layer housing. An annular water channel surrounding a motor stator is formed at the dual-layer housing. The periphery of the motor stator coil is filled with heat-conductive material, and the heat of the motor stator coil is conducted to the annular water channel through the heat-conductive material to perform active heat dissipation for the motor stator coil. Therefore, the cooling efficiency is high and the structure is simple.

Abstract: The invention provides a hinged raft wave energy conversion device (WEC) comprising: a first fore floating body; and a second aft floating body; wherein the first and second floating bodies are connected by a hinge joint for rotation of the bodies relative to each other, in use, about an axis parallel to the still water surface and transverse to the direction of wave propagation; wherein the first and second bodies extend away from the hinge joint in opposite directions; and wherein at least one of the first and second bodies has a sloped surface extending in the direction away from the hinge joint, at least a portion of the sloped surface being under the waterline at least when the device is in the still water rest position.

Abstract: An actuator for a compressor element, the actuator comprising an electrical motor with a motor casing which defines a motor chamber in which a motor rotor is positioned rotatably with the help of one or more motor bearings in relation to a motor stator, whereby the motor stator is built of laminations around which windings are attached and whereby the motor rotor is built of a shaft with laminations, whereby the actuator is further equipped with a cooling circuit for a coolant, wherein the coolant is water, the motor bearings are water-lubricated, the shaft on the motor rotor is made from stainless steel, the windings are embedded in an epoxy resin and a composite sleeve is applied around each of the laminations on the motor rotor and on the motor stator.

Abstract: A variable speed compressor includes a housing assembly having a suction port and an inlet port, a motor disposed within the housing assembly, and at least one rotatable element mounted within the housing assembly. The at least one rotatable element is driven by the motor about an axis of rotation. The variable speed compression additionally includes an unloading system having at least one valve. The unloading system is selectively operable to supplement an unloading of the variable speed compressor defined by an operational speed of the variable speed compressor.

Abstract: A fluid control apparatus includes a valve and a pump. The valve has a valve chamber. The first main plate has a first aperture through which the valve chamber communicates with the outside, and the second main plate has a second aperture through which the valve chamber communicates with the outside. The valve further includes a valve diaphragm disposed inside the valve chamber. The valve diaphragm is configured to switch the communication state. The pump includes a piezoelectric device. The pump has a pump chamber. The pump chamber communicates with the valve chamber through the second aperture. In addition, in flexural vibration of the vibration unit, a frequency coefficient of the first main plate is greater than a frequency coefficient of the second main plate.

Abstract: A cylindrical symmetric volumetric machine, includes a housing (2) with an inlet opening (3) and an outlet opening (4), with an outer rotor (6a) which is mounted rotatably in the housing (2) and an inner rotor (6b) which is mounted rotatably in the outer rotor (6a), whereby liquid is injected in the machine (1). At the outlet opening (4) on the level of the inner rotor (6b) and outer rotor (6a) a liquid separation takes place, whereby the separated liquid ends up in the machine (1) again, and in that the outer rotor (6a) has an axial extension (17) on the level of the outlet opening (4) which extends around this outlet opening (4) almost up against the housing (2) such that a space (19) is located between the axial extension (17) and the housing (2).

Abstract: A pump adapted for use in desalination systems that has four cylinders, with a double acting piston in each cylinder. Each cylinder and piston thereby defines a feed chamber and a recovery chamber. The pistons are connected to a common drive. The connection to the common drive is such that the pistons reciprocate in a sequence equally spaced in time. Reciprocating valving for each piston is driven by the common drive to be 90 degrees out of phase with the respective piston. The valving connects the recovery chamber alternately to an inlet manifold for an intake stroke of the piston relative to the recovery chamber, and to an outlet manifold for a discharge stroke of the piston relative to the recovery chamber. There is a brief period of closure coinciding with top dead centre and bottom dead centre of the piston, during which the recovery chamber is blocked off from both the inlet and outlet manifolds.

Abstract: A pump control system and an operating method thereof are disclosed. The pump control system includes a pump; a motor mechanically connected to the pump; a motor driving controller electrically coupled to the motor, the motor driving controller configured to control a speed of the motor; a current detection unit electrically coupled between the motor and the motor driving controller or electrically coupled to a power supply input interface of the pump control system; and a main controller electrically coupled to the motor driving controller.

Abstract: A management and control method for at least one operation parameter of a pressurization system operated by an electric motor, the method comprising the steps of: detection of an operating pressure value at a delivery duct of the pressurization system, by means of a single pressure sensor; estimation of a hydraulic flow rate and a hydraulic head by means of an algorithm which is implemented in a control software based on the operating pressure value detected by means of the single pressure sensor; estimation of a motor rotation speed of the pressurization system based on the operating pressure value and on the number of blades of the impeller of said pressurization system as a result of said estimation; and processing of an on/off signal of the pressurization system. Also disclosed is a pressurization system, comprising a pressure value and a control electronic unit adapted to perform said method.

Abstract: An overflow valve is built into a metering head for a metering pump used with aggressive media and under high pressure. The overflow valve follows the suction valve or expands it, and directly lowers a critical pressure that occurs in the metering head, using an overflow line. In this way, the safety of the arrangement is improved, and at the same time, less construction space is used up by the additional valve.

Abstract: A computing device has a fan housing that includes a dual rotor fan with a first rotor and a second rotor. The computing device also includes a controller communicatively coupled to the dual rotor fan. The controller is operable to detect a failure associated with the first rotor. In response to detecting the failure, the controller is operable to drive the second rotor at a higher speed than a fan-speed at which the second rotor was being driven before the failure.

Abstract: A bearing housing for a turbocharger is presented. The bearing housing comprises a bearing housing body configured to receive a rotor shaft along a longitudinal axis of the bearing housing body. The bearing housing further comprises a hub connected to the bearing housing body and defining an opening into the bearing housing body, wherein the opening is configured to receive a rotor shaft bearing. Moreover, the bearing housing comprises at least one arm extending radially from the hub, the at least one arm having a first end connected to the hub and a second end opposite to the first end, wherein the second end of the at least one arm comprises a connection structure configured to connect the bearing housing with a compressor housing of the turbocharger.

Abstract: A pumping finger subassembly for a peristaltic infusion pump has a housing, a pinch member, a block member, and at least one biasing spring. The housing includes a transverse slot, a first side wall, and an open second side through which the pinch member and biasing spring(s) are inserted into the transverse slot. The block member includes a foot portion and a side wall portion. The foot portion is insertable into the housing through the open second side such that the block member is constrained against movement relative to the housing and the side wall portion of the block member opposes the first side wall of the housing, whereby the pinch member is supported on both lateral sides to prevent tilting of the pinch member.

Abstract: Embodiments to help detect operation conditions of a compressor of a TRU in real time by a genset are disclosed. The operation conditions of the compressor can be determined by monitoring a parameter pattern of the genset, such as value changes of a horsepower, a torque, an exhaust temperature, fuel consumption and/or a RPM of a prime mover of the genset, or a current drawn from a generator of the genset, over a period of time. In one embodiment, when a scroll compressor is used in the TRU, the scroll compressor may start a periodical load/unload duty cycle when the TRU reaches its setpoint. The periodical load/unload duty cycle of the scroll compressor can be detected based on a corresponding fluctuation pattern in genset parameters. When this periodically fluctuating pattern of ECU parameters and/or current drawn is detected, the prime mover can be switched to a low operation speed.

Abstract: A fluid control device includes a piezoelectric pump having a piezoelectric element, a driving circuit that receives a driving power supply voltage applied thereto and drives the piezoelectric element, and a startup circuit disposed between the driving circuit and an input terminal for a power supply voltage. The startup circuit increases the driving power supply voltage to a voltage (V1) lower than a constant voltage (Vc) in a first stage (P1) after startup, maintains or decreases the driving power supply voltage in a second stage (P2) following the first stage (P1), and increases the driving power supply voltage to the constant voltage (Vc) in a third stage (P3) following the second stage (P2).

Abstract: An electric liquid pump includes a casing having a central portion, rear cover and front cover, having an inlet and an outlet for the liquid. The central portion has first and second compartments, with the second compartment in fluid communication with the front cover interior. The pump includes an impeller and an electric motor, for operating the impeller, a stator housed in the first compartment, a rotor, coaxial with the stator, housed in the second compartment and an electronic card for supplying the stator at least partly housed in the rear cover. The central portion includes a plurality of walls delimiting a plurality of gaps in fluid communication with the second compartment and the front cover interior such that the liquid circulates in the gaps. The walls at least partly face the stator such that the liquid circulating in the corresponding gap removes heat from the stator.

Abstract: A miniature piezoelectric pump module is provided and includes a piezoelectric pump, a microprocessor, a driving component and a feedback circuit. The piezoelectric pump includes two electrodes and a piezoelectric element and has the best efficiency while operating under an ideal operating voltage. The driving component is electrically connected to the microprocessor and the piezoelectric pump and includes a transform element and an inverting element. The transform element outputs an effective operating voltage to the piezoelectric pump. The inverting element controls the two electrodes to receive the effective operating voltage or to be grounded. The piezoelectric element is subjected to deformation for transporting fluid due to piezoelectric effect. The feedback circuit generates a feedback voltage according to the effective operating voltage.