Abstract: A hemispherical entrainment-type high-flow self-priming centrifugal pump includes a hemispherical entrainment system, a pump body and a pump inlet pipe. The hemispherical entrainment system is disposed above the pump body. The hemispherical entrainment system comprises four layers of entrainment cavities, including a spherical entrainment interior cavity, a primary entrainment cavity, a secondary entrainment cavity and a tertiary entrainment cavity. The spherical entrainment interior cavity is a double circular pipeline that ascends in a spiral overlapping manner to wrap a hemispherical surface, and improves the entrainment capacity, while increasing the entrainment area. The primary entrainment cavity is allowed to be in communication with the secondary entrainment cavity and the tertiary entrainment cavity by upward sliding of a sliding check core. The secondary entrainment cavity entrains the gas in the pump inlet pipe, and the primary entrainment cavity entrains the gas in a pump cavity.

Abstract: A wound rotor motor is provided, in which a rotary shaft is arranged in the vertical direction, to immerse lower coil portions of a stator and a rotor in cooling oil, thereby improving the cooling effect beyond that of a conventional configuration, in which lower coil portions are partially immersed, and consequently decreasing the capacity of an oil pump. A wound rotor motor is provided, in which a rotary shaft is arranged in the vertical direction and has therein a flow passage, through which cooling oil moves up from the region below the rotor and is sprayed to the region above the rotor by centrifugal force generated by rotation of the rotor, thereby enhancing the motor-cooling effect, decreasing the frictional loss of the rotor due to the cooling oil, and consequently improving the operational efficiency of the motor.

Abstract: The invention relates to a wet gas compression system comprising a compact flow conditioner (21), intended to be placed below sea level in close vicinity to a well head or on a dry installation, said flow conditioner (21) being intended to receive a multi-phase flow through a supply pipe (11) from a sub sea well for further transport of such hydrocarbons to a multi-phase receiving plant, and where preferably avoid sand accumulation or remove as much sand as possible from the multi-phase flow, the gas (G) and the liquid (L) being separated in the flow conditioner (21) whereupon the separated gas (G) and liquid (L) are re-assembled and enters a multi-phase meter (46) prior to boosting by means of a compressor (22). In the combined multi-phase pump and compressor unit (22), as an integrated unit, comprises a combined multi-phase pump and compressor unit (22) functioning on the centrifugal principle, used for trans-porting liquid and gas from a flow conditioner (21) to a remote multi-phase receiving plant.

Abstract: A hydrogen recirculation blower for a fuel cell vehicle includes an ejector integrated with a housing of the blower. An integrated hydrogen recirculation blower for a fuel cell vehicle includes: a blower housing including an inlet and an outlet formed on a top surface thereof; an impeller rotatably installed inside the blower housing; a motor connected to a rear end of the impeller to rotate the impeller; and an ejector formed integrally on a upper surface of the blower housing.

Abstract: In a housing of a pump apparatus having a flow control valve to discharge a part of excess fluid in a deviated slanting way to a bypass pass 11, a pair of suction paths 19, 19? is formed opposite to end portions 119, 119? of the bypass path 11 to send operation fluid to suction ports of the pump apparatus. A dividing wall is equipped at opening portions of said pair of suction paths 19, 19? to distribute the operation fluid to each of suction paths 19, 19?. A cross sectional area of one of said opening portions in a side of a direction of said deviated slanting way is smaller than a cross sectional area of the other of said opening portions in an opposite side of the deviated slanting way to relatively restrict a flow of said operation fluid in said one of opening portions.

Abstract: A self priming pump having a pump housing including a suction passage and a discharge passage. A pump chamber with an inlet and an outlet is also provided in the pump housing. A pump impeller is arranged in the pump chamber and has a suction opening opposed to the inlet of the pump chamber. A working fluid chamber is provided in the pump housing and is connected to the outlet of the pump chamber and to the discharge passage of the pump housing. A jet pump diffuser is provided directly upstream of the pump impeller. The jet pump diffuser has an inlet which is in communication with the suction passage of the pump housing and cooperates with the outlet of a jet pump drive nozzle within the suction passage. The inlet of the drive nozzle is connected to a supply passage which is connected to a supply passage which is connected to the working fluid chamber. A bypass line leads from the suction passage to the outlet of the diffuser while bypassing the inlet thereof.

Abstract: A pump (10) for providing water from a source to a remote location includes a casing (11) which receives the water through an inlet port (22) which is provided to the remote location through a discharge port (20). An impeller (30) in the casing (11) is rotated by a motor (23). A diffuser (35) is positioned adjacent to the impeller (30) and has a shoulder (42) facing the inlet port (22). A nozzle (44) is mounted in the inlet port (22) to receive low pressure water from the source which is transmitted to a venturi tube (43) positioned between the diffuser shoulder (42) and the front wall (16) of the casing (11). The venturi tube (43) directs water to the impeller (30) and diffuser (35) which provide water at high pressure, upon demand, through the discharge port (20) and also recirculates high pressure water in the casing (11) to the venturi tube (43) through openings (51) in the wall thereof.

Abstract: An electrically operated fuel pump for automotive vehicles which utilizes a turbine pump rotor operating in an annular pumping channel having circumferentially spaced inlet and outlet ports. The pumping channel has opposed sides with a circumferential array of radially curved grooves axially opposed to the periphery of the impeller and extending radially inwardly from the impeller vanes. The pump has a main outlet leading to the engine to be supplied with fuel. A secondary outlet leads to a fuel jet positioned to direct fuel into a venturi passage to draw fuel from a pump inlet and discharge it into a reservoir in a main fuel tank, the pump being located in the reservoir. A biased valve in the secondary outlet opens when the pump outlet pressure reaches a predetermined pressure to insure adequate fuel flow to the engine upon cold start conditions before fuel is drawn by the jet and venturi and delivered to the reservoir.

Abstract: A self-priming centrifugal pump includes a cylindrical metal plate case forming a pressure chamber and provided with a suction inlet and a pressure outlet. The pressure chamber has a bladed impeller with a peripherally arranged diffuser, an axial ejector device including a venturi tube, and a torus-shaped interspace adapted to convey the emitted flow from the radial diffuser towards the pressure chamber. A single curved blade is arranged in the lower portion of the interspace and extends from the peripheral region of the radial diffuser up to a central annular outlet passage of the interspace which extends all around said ejector device in such a manner to counteract the rotational component of the fluid speed direction and to promote separation of air.

Abstract: A system and process of parallel compressors for compressing fluids miscible with oil. The present invention utilizes parallel-coupled compressors, wherein each compressor comprises a crankcase chamber, discharge chamber, suction chamber, and ejector which operate independent of one another. Means are provided for coupling the ejector in the return of the lubrication pump oil within the crankcase chamber and the maintenance of that oil level in all the crankcase chambers regardless of each compressor capacity and quantity with which they are operating or are not operating. The transference of suction chamber oil to crankcase chamber is performed by the ejector via energy from the lubrication pump contained within each crankcase chamber. Further, transference of oil from suction chamber to crankcase chamber via an ejector performs all necessary equalization functions.

Abstract: The present invention relates to a self-priming centrifugal pump which includes a stator case with a delivery port and an outflow port and a radial-centrifugal bladed impeller. An ejector is provided inside the case and has an induction chamber which is connected to the intake port, an entrainment nozzle connected to the internal chamber of the stator case and a diffusion duct which is coaxial to the impeller and is connected to its inflow section. A conveyor is provided after the impeller and includes at least one radial-centripetal conveyance channel and an annular outflow section which extends peripherally to the diffusion duct of the ejector. The conveyor has a configuration which is suitable for directing the flow which leaves the impeller toward a central portion of the case which is adjacent to the outer portion of the diffusion duct and is distant from the delivery port, and for making the flow laminar so as to facilitate the separation of air and its migration toward the delivery port.

Abstract: In a centrifugal compressor having an ejector for reclaiming the oil which tends to accumulate in a lower portion of the suction housing, the ejector high pressure line is provided with its inlet at the bottom of the collector such that, in addition to providing the high pressure power to the ejector, it also functions to pump out any oil that has accumulated at the bottom of the collector and to discharge it into the oil sump.

Abstract: A shallow well centrifugal pump having a casing forming a fluid flow cavity and having a fluid intake end with a threadless bore and a suction inlet communicating with the cavity through the bore, and a diffuser disposed in the casing cavity and spaced from the casing intake end. The diffuser has a threadless opening defined therein leading to an impeller. A venturi nozzle assembly is supported in the casing cavity between the casing intake end and the diffuser. The assembly has threadless opposite end portions disposed in slidably removable slip fitted relation within the casing intake end and diffuser in the respective threadless bore and opening therein. Endless sealing elements preferably in the form of O-rings are fitted about the respective threadless opposite end portions of the venturi nozzle assembly for providing hermetic seals between the assembly opposite end portions and the casing intake end and the diffuser.

Abstract: Pump system includes a centrifugal pump having an inlet reservoir connected to the upstream end thereof for initially receiving the vapor/liquid mixture entering the system to allow air or vapor to separate from the liquid. Below the liquid level in the reservoir is a mixing tube which provides the only liquid flow path to the centrifugal pump. Also within the reservoir below the liquid level is a main ejector pump which injects liquid into the mixing tube. The injected liquid induces liquid flow from the reservoir into the mixing tube for flow to the centrifugal pump. Also, one or more vapor scavenge ejectors may be provided within the reservoir to induce air or vapor from selected collection areas within the reservoir and propel the air or vapor into the mixing tube intermediate its length where the air or vapor is thoroughly mixed with the liquid contained therein at an intermediate pressure higher than the reservoir pressure before entering the centrifugal pump.

Abstract: A rotating flow pump such as a centrifugal pump is provided with a feed pump unit formed as an ejector. The feed pump unit comprises an inlet portion, a nozzle, and a diffuser arranged in succession, and the diffuser is connected to the inlet opening of the flow pump. The inlet portion, the nozzle, and the diffuser of the ejector are situated in a plane perpendicular to the shaft of the flow pump. The diffuser comprises an inner channel of a uniformly increasing flow cross section at least over part of its length. Furthermore the diffuser comprises an outer jacket situated substantially coaxially about the above channel. Thus the jacket is formed in such a manner that a substantially 180.degree. almost mushroom-shaped turning of the flow direction for the liquid flowing through the diffuser is obtained at the same time as a uniformly increasing flow cross section--seen in the flow direction--is obtained within the annular chamber between the channel and the jacket.

Abstract: A pump assembly having an impeller for pumping a liquid from an inlet to an outlet, said impeller being driven by a motor, and mechanical seal means comprising a pump seal and a motor seal with a seal leakage chamber therebetween, and ejector means for inducing flow of liquid from the seal chamber so that it does not leak across the faces of the seal rings of the motor seal and into the motor housing where it would damage the motor. The ejector means has a nozzle driven by pump liquid and a suction chamber connected to the mechanical seal leakage chamber. By preventing liquid from the seal chamber from leaking across the faces of the motor seal into the motor housing, the ejector means maintains the seal leakage chamber at or near the vapor pressure of the pumped fluid.

Abstract: A sonic pressure wave operated pump is provided with a rotary sonic pressure wave generator which impactingly generates sonic pressure waves of special character in a column of liquid contained in the pump with the generated sonic pressure waves being transmitted through a metallic production tube about the inner walls of the tube to a pumping unit which is in communication with a liquid to be pumped. The pumping unit reflects the generated sonic pressure waves back into the center of the production tube for movement countercurrent to the movement of the generated sonic pressure waves with the pumping unit reacting to the reflection of the sonic pressure waves by intaking the liquid that is to be pumped so that it is carried through the production tube with the reflected sonic pressure waves.

Abstract: A well system comprising a pump having an inlet and an outlet and a combined pressure regulating valve and pressure flow control tank. The tank comprises a hollow container having a diaphragm therein overlying an inlet connected to the outlet of the pump and an outlet connected to the system. The diaphragm is urged by a charge of gas in the container to normally seal the inlet and outlet to said chamber in the absence of fluid pressure from the pump sufficient to move the diaphragm away from the inlet and outlet. Thus, the combined pressure regulator valve and pressure tank functions as a flow control to insure that the flow from the outlet is substantially at a predetermined pressure and that when the pressure falls below a predetermined amount, the diaphragm seals against said inlet and the outlet to said chamber and maintains water in the outlet of the pump sufficient to maintain a prime on the pump and prevent the pump from running dry.

Abstract: A petroleum well has a plurality of centrifugal pump stages, a jet pump stage, and an electrical drive motor. A recirculated portion of the output from high pressure stages of the centrifugal pump provides power fluid for the jet pump, and the jet pump aspirates fluid from lower pressure centrifugal pump stages. The balance of the output of the high pressure stages goes to the surface as production. The output of the jet pump supplies the high pressure stages. A centrifugal cleaner upstream of the power fluid inlet for the jet pump cleans that stream of particulates. The overall flow rate through the centrifugal stages exceeds the production rate of the pump by the amount of power fluid for the jet pump. The jet pump caps the assembly and can be separately removed for servicing and adapting the pump to the flow requirements of the well.