Abstract: A fluid distribution valve which selectively distributes a fluid supplied from a fluid supply source to a plurality of flow channels, includes first and second branch pipes communicated with the fluid supply source; and a valve body selectively closing either one of the two branch pipes, and including a through hole allowing a circulation of the fluid into the second branch pipe from the fluid supply source in a case wherein the first branch pipe is closed. While the valve body closes the first branch pipe in an initial state thereof, the valve body is displaced or deformed according to a pressure difference of the fluid in the a first branch pipe side and the a second branch pipe side when the fluid is supplied from the fluid supply source so as to open the first branch pipe, and to close the through hole.

Abstract: Disclosed is a large-scale submersible sewage pump assembly that includes a pump and a pump seat installation structure, wherein the pump seat installation structure has a concrete installation base layer, and a pump seat for installing the pump. The pump seat is fixed to the pump installation layer, and the bottom of the pump is directly connected onto the pump seat. The pump has a motor cooling apparatus, wherein the cooling apparatus has an internal cooling apparatus installed inside the case of the motor, and an external cooling apparatus installed outside the motor. The pump seat installation structure can stably mount and support the large-scale submersible sewage pump, preventing potential safety hazard during running of the pump.

Abstract: A rotary pump can pump a liquid for pollution control of exhaust gases in a system on board a vehicle and can include a rotor and a stator that are positioned in a casing. The casing can include a wall delimiting a main internal volume and an integral outlet pipe for the pump. A pressure sensor can be positioned within the main internal volume of the casing.

Abstract: A magnetic-drive coupling pump configuration including an attachment/detachment mechanism allowing simple and reliable positioning and fixation is provided. Thrust-direction positioning and radial-direction positioning are achieved, respectively, by surface contact of a convex portion of a pump unit (10) inserted up to a predetermined position in a concave portion (31) of a drive motor unit (30), and contact between an outer circumferential surface of the convex portion (11) and an inner circumferential surface of the concave portion (31).

Abstract: A pump comprising a housing comprising a rotor chamber, inlet and outlet channels opening into the rotor chamber, and inlet and outlet seals mounted on a surface of the chamber, and a rotor rotatably and axially slidably received in the chamber and comprising a first axial extension comprising a liquid supply channel and a second axial extension comprising a liquid supply channel, the first and second axial extensions having different diameters. The inlet and outlet seals engage a surface of the rotor, whereby the liquid supply channel of each axial extension in conjunction with a corresponding seal forms a valve that opens and closes as a function of the angular and axial displacement of the rotor. At least one of the inlet and outlet channels opens transversely into the rotor chamber and at least one of the inlet and outlet seals forms a closed circuit circumscribing said at least one of the inlet and outlet channels.

Abstract: An electrically controllable electromechanical inlet valve (2a) which is closed in the currentless state and is held in the closed state by the force of a spring (2b), an outlet valve (5a), and a displacement element (6), the inlet valve is operated in a self-controlling operating mode after a start command is present. In the self-controlling operating mode, the rail pressure is built without knowledge of the phase position of the displacement element. During the self-controlling operating mode, the phase position of the displacement element is determined. After the phase position of the piston or displacement element is determined, the inlet valve is switched over to a non-self-controlling operating mode.

Abstract: A linear compressor is provided that provides a greater power by changing a frequency at high load. The linear compressor includes a mechanical device having a fixed member, a movable member linearly reciprocated in the fixed member, one or more springs provided to elastically support the movable member, and a motor connected to the movable member, and an electric controller having a rectifier, an inverter that receives a DC voltage from the rectifier, converts the DC voltage to an AC voltage, and supplies the AC voltage to the motor, a voltage sensor that senses the DC voltage, a current sensor that senses a current, and a controller that calculates a required voltage for the motor, generates a control signal, and applies the control signal to the inverter, if the required voltage is greater than the DC voltage of the voltage sensor.

Abstract: A motor shroud for an electric submersible pump is described. A motor shroud includes a shroud collar secured around a base of a centrifugal pump, the shroud collar including a plurality of sealant pathways extending around an inner surface and an outer surface of the shroud collar, wherein at least one of the plurality of sealant pathways has an aperture extending radially through the shroud collar between the inner surface and the outer surface, a shroud hanger tubularly surrounding the outer surface and fixedly coupled to a shroud jacket, the shroud hanger including a sealant entry port, and a sealant occupying a first space between the shroud hanger and the shroud collar and a second space between the shroud collar and an intake of the centrifugal pump, wherein the sealant cures from an aerosol spray to form a hardened foam barrier to a flow of well fluid.

Abstract: In a magnetic coupling pump including a closed impeller, and a casing that houses the impeller in such a way that the impeller is rotatable around a rotation axis and movable in an axis direction in which the rotation axis extends, reduction in the rotational frequency of the impeller can be suppressed even if thrust balance collapses temporarily and the impeller and the casing come into contact with each other. A tapered surface (24) or (55) is formed in at least a portion of at least one of a surface (24) or (53) of the impeller (10) and a surface (66) or (86) of a pump casing (60) that faces each other in an axis direction (Da) so that the distance between both the faces varies gradually as it goes in a radial direction (Dr) perpendicular to the axis direction (Da).

Abstract: A pump device may include a first case provided with a circular ring-shaped protruded part, a second case provided with a circular ring-shaped stepped part into which the circular ring-shaped protruded part is coaxially inserted, an O-ring which is mounted on a circular outer peripheral face of the circular ring-shaped protruded part and is crushed between the circular outer peripheral face of the circular ring-shaped protruded part and a circular inner peripheral face of the circular ring-shaped stepped part in a direction perpendicular to an axial line of the circular ring-shaped protruded part, and a turning prevention mechanism which prevents the first case and the second case from being relatively turned to each other around the axial line when the circular ring-shaped protruded part of the first case is inserted into the circular ring-shaped stepped part of the second case to form the pump chamber.

Abstract: Systems and methods for transporting a hydrocarbon are provided. The method can include introducing a fluid at a first pressure and a first temperature to an inlet of a pump and pressurizing the fluid within the pump to produce a pressurized fluid having a second pressure and a second temperature. The method can also include flowing at least a portion of the pressurized fluid through a first heat exchanger and back to the inlet of the pump. The heat exchanger can include a coil having an inlet and an outlet and a housing at least partially enclosing the coil and having a first opening and a second opening. A first end of the coil can be disposed proximate the first opening. The heat exchanger can also include a foundation for supporting the coil and the housing.

Abstract: A two-stage medium-pressure screw air compressor includes a primary screw compressor (21) and a secondary screw compressor (22) communicating with the gas-liquid separator (6) via the first gas-liquid inlet (61). A first oil outlet (63) is connected to a mid section of a gas-liquid separator (6). The oil is injected into the lubricating components of the compressor is the first oil outlet (63), a first filter (64). A secondary oil-water separator (9) is connected to the first oil outlet (63) of the gas-liquid separator (6), the second oil-water separator (6) has an upper separating tank (91) and a lower separating tank. The water and the impurities contained in the lubricating oil can be eliminated at a largest extent, so as to create essential condition thr ensuring the screw compressor to operate continuously, stably and safely and provide high operational reliability, safety and long service life.

Abstract: A household fan for providing the feel of a natural breeze includes a motorized impeller for providing airflow, a controller coupled to the motorized impeller for changing characteristics of the airflow, and an interface in communication with the controller for receiving human instructions. The fan further includes a breeze setting to be selected by way of the interface and implemented via the controller to operate the motorized impeller. The breeze setting varies intensity of the airflow that is output by the motorized impeller such that local extrema of the intensity are related to numbers selected by way of random number generation within a bounded range or numbers drawn from a sequence of substantially non-consecutive numbers.

Abstract: The invention relates to an underwater delivery unit with a pump and a drive device that is sealed against the surrounding water and a process medium. According to the invention, the pump (31) and the drive device (32) are combined into a module with a module housing (3) and are arranged in a pressure housing (2), wherein the pressure housing (2) is filled with the process medium and surrounds the module housing (3).

Abstract: The invention relates to improvements in compressors and, in particular, to improvements in a method of controlling centrifugal compressors to maximize their efficacy. The compressor has an impeller mounted on a shaft supported by an active magnetic bearing unit and is driven by a variable speed motor at a rotational speed under normal on-load conditions at a calculated pre-surge speed for the required delivery pressure. The actual rotational speed and delivery pressure of the compressor is repeatedly measured and recorded at high frequency. The compressor is allowed to surge periodically after a preset re-calibration time and the compressor is put into a surge recovery cycle when surge is detected, during which the compressor is off-loaded and the rotational speed reduced.

Abstract: A system includes a pump that is operative to move liquid out of a reservoir. The system also includes a depth level sensor that is operative to determine a depth level of the liquid in the reservoir, and a controller operatively connected to the depth level sensor. The system further includes a variable frequency drive operatively connected to the motor and the controller. Responsive to the determined depth level of the liquid increasing to a first level, the controller is operative to start operation of the motor. The variable frequency drive is operative to control the speed of the motor. The controller is operative to cause the variable frequency drive to output an optimum frequency that causes the motor to operate at substantially the lowest usage of energy to lower the depth level of the liquid in the reservoir from the first level to a second level.

Abstract: A peristaltic pump includes a plurality of effecters, actuated in a periodic manner upon by obstructive forces of a flexible infusion tube so as flow of infusion fluid is provided along said infusion tube, the magnitude of the obstructive forces being dependent upon the displacement of said moving effecters; and a plurality of balancing magnets providing balancing forces upon one or all the moving effecters, the balancing forces at each point along the path of motion of the moving effecters being of approximately equal magnitude to that of the obstructive forces at the point; such that the parasitic output due to work performed against the obstructive forces is approximately zero and yield is maximized.

Abstract: Reciprocating positive-displacement diaphragm pump (1) intended for liquids and for medical use, has a driving part (10) within which there are an electromagnetic actuator (11), incorporating at least one coil (12) and activating a piston (14) of a moving member (15) capable of cyclic linear motion. The pump comprises a pump body (20) within which there is a pre-loaded diaphragm (22) able to undergo a translational movement by elastic deformation from a normal rest position to an adjacent position through the transmission of the work from a piston (14). It incorporates a device (30) for detecting out-of-tolerance variations in the intensity of the supply current by measurements (33), a device (40) for continuously measuring the position of the moving member (15) and devices (30, 45) for processing and analyzing the measurements, which are able to generate at least one malfunctioning alarm signal (35) indicating the detection of at least one malfunction of the pump.

Abstract: A motor pump unit for a high-pressure cleaning apparatus has an electric motor and a pump. The electric motor has a motor housing that is surrounded by a cooling housing with an annular space having an annular space inlet and an annular space outlet formed therebetween. The pump has a suction inlet connected to the annular space outlet and a pressure outlet. The liquid to be transported by the pump can be supplied to the annular space inlet. In order to improve the motor pump unit such that the motor housing can have a small wall thickness and can still be cooled effectively over a large surface area, the motor housing is configured as a one-piece deep-drawn part which in a front shell area contacts stator laminations of the electric motor and in a rear shell area is arranged at a distance from rear coil heads of the stator and in the rear shell area has stiffness-enhancing depressions, wherein the front and the rear shell areas are surrounded by the annular space.

Abstract: A temperature range in which an electric oil pump to supply oil to a vehicle drive system can start is enlarged to enhance an effective use degree, enhance a start success probability, and suppress malfunction occurrence. When a measured oil temperature To is in a temperature range (T1?To<T2) in which it is not clear whether or not the electric oil pump normally operates, a trial operation is performed with a drive current limited as compared with a regular operation and a target rotation number No while malfunction determination is invalid (a non-established state) (S1?S6), when a rotation number which is not smaller than predetermined rotation number No cannot be achieved, pump driving is stopped (S9, 14), and when the rotation number is achieved, the malfunction determination is allowed (S11), and the pump is driven according to an instruction (S12).