Abstract: A pump having a generally hollow housing, an annular rotor rotatively mounted inside the housing, an annular stator fixedly mounted inside the housing and peripherally surrounding the rotor and a closed impeller axially aligned with the annular rotor. The impeller includes a tubular fluid inlet member fixedly mounted within the annular rotor, such that the rotor rotatively drives the impeller.

Abstract: A pump for a cryogenic liquid, in particular liquid oxygen, includes a hydraulic motor which is supplied with a motor liquid under pressure and drives a wheel for pumping the cryogenic liquid, and relative sealing device preventing contamination of the cryogenic liquid by the motor liquid.

Abstract: A gas-turbine engine combustion system comprises a plurality of combustors interconnected by crossfire tube assemblies adapted to pass an ignition flame from an ignited combustor to another combustor on start-up of the engine. Each crossfire tube assembly comprises a cooling air inlet for introducing air into the assembly to film-cool its inner, ignition flame-facing surface, and a cooling sleeve surrounding the crossfire tube assembly in the region in which it opens into the combustor. The cooling sleeve directs the cooling air so as to cool the outer surface of the assembly, the inside of the sleeve and the inside surface of the combustor wall adjacent the cooling sleeve.

Abstract: An integrated gasification combined cycle plant is combined with a Kalina bottoming cycle. High thermal energy streams 31, 69, 169 from the gasification system are provided in heat exchange relation with the two component working fluid mixture at appropriate locations along the Kalina bottoming cycle units to supplement the thermal energy from the gas turbine exhaust 28 which heats the working fluid supplied to the vapor turbines. Particularly, low temperature heat recovery fluid from the low temperature cooling section 50b of the gasification system lies in heat exchange relation 27 with the condensed working fluid from the distillation/condensation sub-system of the Kalina cycle to preheat the working fluid prior to entry into the heat recovery vapor generator 12. Heat recovery fluid from the high temperature gas cooling section 50a of the gasification system is placed in heat exchange relation 23 and 65 with the working fluid at an intermediate location along the heat recovery vapor generator 12.

Abstract: A method for controlling working fluid surge in a centrifugal compressor. According to the method, surge detection is accomplished by calculating the change in the compressible fluid mass flow rate that accompanies surge in a compressor, the compressor having means for sensing a first fluid temperature, means for sensing a first pressure, means for sensing a second pressure, and means for measuring current drawn by a compressor prime mover, the method comprising the steps of: calculating the time rate of change of the first fluid temperature; calculating the time rate of change of the first fluid pressure; calculating the time rate of change of the second fluid pressure; calculating the time rate of change of current drawn by the compressor prime mover; calculating the mass flow rate by combining the calculated rates of change; and comparing the calculated mass flow rate to a predetermined acceptable mass flow rate to determine if surge is present.

Abstract: A water system includes a reciprocating pump operated by pedal and motor delivered solar power, including one-way engagement clutch elements preventing hazardous pedal movement and potential motor damage. The pumpstand includes a housing in which a foot pedal and a drive shaft rotate. An eccentric pin, rotating with the drive shaft, moves a connecting rod, which in turn causes a pushrod to oscillate vertically. The pushrod extends into a pressure-tight chamber formed above the rising main (well pipe). A pumprod connected to the pushrod extends to move a conventional plunger through vertical oscillations. A flywheel is attached to the drive shaft, and a counterweight is mounted on the flywheel diametrically opposite the eccentric pin. The radial distance from the drive shaft to the counterweight can be adjusted. A discharge pipe extends from the pressure-tight chamber to an elevated or pressurized storage tank.

Abstract: An electrically-operated sealed compressor includes a cylinder, a cylinder head mounted on the cylinder and having a suction chamber and first and second discharge chambers, a piston accommodated in the cylinder, and a valve mechanism. The valve mechanism includes a suction muffler and a valve plate having at least one suction port, first and second discharge ports, and first and second pass holes. The first discharge port and the first pass hole communicate with the first discharge chamber, while the second discharge port and the second pass hole communicate with the second discharge chamber. The valve mechanism also includes first and second discharge valves mounted on the valve plate and accommodated in the first and second discharge chambers, respectively, a suction reed having a reed valve for selectively opening and closing the suction port, a discharge gasket for sealing the valve plate and the cylinder head, and a discharge muffler.

Abstract: A method for totalizing the volume of liquid pumped to or from a vessel by a set of pumps. The method comprises the following steps: Calculating a running time for each of the pumps. Determining a first rate of change of volume when each of the pumps is turned on and a second rate of change a predetermined period after each of the pumps is turned on. Determining a draw down rate for each of the pumps and calculating the volume pumped by each pump based on the running time and draw down rate. Summing the volume pumped by each of the pumps to give a total volume pumped for the vessel over the operating time for the pumps. The totalizing method is incorporated with a control system for controlling the pumping of liquid to or from a vessel using one or more pumps. The control system comprises a level sensor, an actuator for each of the pumps, and a controller. The controller is programmed to issue control signals to the actuators and execute process steps for totalizing the volume of liquid pumped in the vessel.

Abstract: A turbojet engine has a capability for propelling an air-borne vehicle over an extremely wide range of operating speeds. A vehicle can be propelled from take-off conditions through speeds in excess of Mach 5. The engine is equipped with a cooling fluid injection system which cools intake air at high operating speeds. Cooling of intake air permits continued turbojet engine operation at speeds which produce stagnation air inlet temperature in excess of those which critical compressor components can tolerate. The inlet air entering the compressor is pre-cooled with injected fluid so that its temperature is reduced below the critical operating temperature limits of the critical compressor components.

Abstract: A method and apparatus to amplify the magnetic field in an electromagnetic circuit is provided. Amplification factors of several orders of magnitude may be obtained. The system is applicable to a number of different systems, including melt levitation and electromagnetic pumping and propulsion. One embodiment of the invention uses a non-conducting permeable core wound around a dielectric core. An alternating voltage source is connected to a solenoid which is wound around a section of the permeable core. The permeable core has a gap within which a flux concentrating cold crucible is provided. Melt levitation processing takes place within the cold crucible.

Abstract: An electrostatic ion propulsion engine for satellites and spacecraft is equipped with an electron source for neutralizing the propellant gas ion beam or jet emitted by the engine. The electron source includes an anode housing, a hollow cathode tube with gas flowing therethrough, a cathode element at the outlet end of the cathode tube within the interior space of the anode housing, and a pin- or rod-shaped auxiliary electrode arranged along the lengthwise axis in the hollow cathode tube. An ignition pulse is applied to the auxiliary electrode relative to the cathode tube, which causes a pulse discharge in the cathode tube, and in turn ignites the gas discharge between the anode and the cathode which generates the electron current.

Abstract: A pump unit with a drive motor mounted onto a pump block which reduces noise problems which stem from clearance fits that are required in order to be able to mount the drive motor onto the pump block. A pump unit set forth eliminates clearance fits required for the perfect assembly of the pump unit by means of plastic introduced into the clearance fits. The pump unit is particularly provided for slip-controlled vehicle brake systems in motor vehicles.

Abstract: A fuel control system for supplying metered quantities of fuel from a fuel supply (11), through a boost pump (13), a filter (21), a high pressure fuel pump (14), a metering valve (15) and a pressurizing valve (17) to an engine fuel manifold (19) includes an ecology valve (43) which provides a fuel flow path (41, 42, 71, 46, 18) between the pressurizing valve (17) and the engine fuel manifold. The status of the ecology valve (43) is solely determined by the status of the pressurizing valve (17). The ecology valve (43) includes a housing (93, 95, 97) with a piston (61) disposed therein which is reciprocable between two extreme positions. The piston (61) defines, in conjunction with the housing, a variable volume chamber (55) for withdrawing a one piston stroke volume of fuel from the engine fuel manifold when the engine is de-energized and the piston (61) moves from one extreme position to the other thereby purging the fuel manifold of fuel.

Abstract: A piston pump, which is provided as a return feed pump for a slip-regulated motor vehicle brake system. In order to simplify the manufacture, a sleeve in the form of a tubular piece is clamped between a fastening element which is inserted into the cylinder bore using a self-clinching technique, and the cylinder bore, and is thus sealed and fixed in place. In addition to the simple manufacture of the sleeve out of reasonably priced tubular material, the piston pump has the advantage of a sealing of the sleeve in the cylinder bore without a separate sealing element such as a sealing ring.

Abstract: An improved piston-type vacuum pump comprises a reciprocating piston disposed within a cylinder having a proximal end and a distal end, an inlet port formed in the side of the cylinder near the proximal end, and a spring-biased outlet valve, such as a poppet valve or a rocker valve, disposed at the distal end of the cylinder. The piston stroke is configured to provide zero or negative clearance between the piston head and the face of the outlet valve at the end of the compression stroke. The piston reciprocates within the cylinder from a first position wherein the surface of the piston head is proximal of the inlet port, to a second position wherein the surface of the piston head is beyond the distal end of the cylinder, so as to contact the face of the outlet valve in its open position.

Abstract: A heat dissipation fan as disclosed includes a heat dissipation fan blade, a self-lubricating bearing, a stator having an electrical circuit plate and a casing. The heat dissipation fan blade includes a shaft extending therefrom. The shaft has a rounded free end that and contains a neck to seat a locking plate therein. The casing has a collar extending therefrom to hold the stator in place. The collar contains a recess to securely receive the self-lubricating bearing and forms an internal shoulder to restrain and support the locking plate and the self-lubricating bearing. The locking plate is round and contains a through hole therein. The through hole has a diameter corresponding to that of the neck in the shaft. The locking plate has multiple slits formed on the periphery of the through hole. A washer is placed in the bottom of the recess and contains a hole with a diameter smaller than the shaft to abut the free end of the shaft.

Abstract: A motor system using a totally enclosed fan-cooled (TEFC) electric motor to provide power. The motor enclosure may be sealed with a variety of sealing devices, including a double mechanical seal a single mechanical seal, a double lip seal injected with grease, a labyrinth seal, and/or a repeller positioned adjacent the motor enclosure. A release mechanism prevents the fan from creating excessive drag when the system is immersed in water. The fan cools the motor when the water level is below the motor, and the surrounding water combines with the fan to cool the motor when the water level rises to at least partially surround the motor. When the fan is at least partially immersed, the release mechanism substantially prevents the fan from imposing a load on the motor due to the surrounding water. The release mechanism can take the form of a shear key, a torque-release clutch or flexible fan blades. Alternatively, a separate fan motor may be provided for driving the cooling fan.

Abstract: Connected to a flexible tube 13 which is expandable or shrinkable in the radial direction, are a flowpath 17 on the side of supply, which is provided therein with an on-off valve 21 on the side of supply, and a flowpath 19 on the side of discharge, which is provided therein with an on-off valve 22 on the side of discharge. A bellows 14 elastically deformable in the axial direction is disposed at the outside of the flexible tube 13. This bellows 14 has a small bellows portion 24 and a large bellows portion 25. An incompressible medium 43 is enclosed in a pump chamber 42 formed between the flexible tube 13 and the bellows 14. An operating disk portion disposed between the small bellows portion 24 and the large bellows portion 25 is displaced in the axial direction, whereby the inner volume of the bellows 14 is changed, so that the flexible tube 13 is expanded or shrunk in the radial direction to carry out the pumping operation.

Abstract: An axially symmetric turbojet engine exhaust-nozzle includes a system for masking the exhaust jet, such system including inner hot flaps (7), hinging on a conical shell (4) and driven by a first control ring (10) powered by linear actuators (11), and outer cold flaps (20) hinging on an annular assembly (12) and driven by a second control ring (22) powered by linear actuators (23) to vary the angle of the cold flaps. The annular assembly (12) is axially displaceable by a third set of linear actuators (30). Each cold flap (20) comprises an inner skin (40) fitted with orifices (43) and hinging on the annular assembly(12) and an outer skin (41) spaced radially away of the inner skin (40) to define an air flow channel between the skins.

Abstract: A turbo fan engine nacelle houses an engine which forces engine exhaust through a primary nozzle and a fan nozzle positioned along a common central axis. The primary nozzle is bordered interiorly by a primary nozzle plug and bordered exteriorly by a primary nozzle sleeve. The fan nozzle is bordered interiorly by a core cowl and bordered exteriorly by a fan nozzle sleeve. The primary nozzle plug includes a generally cone shaped outer surface which is concave when viewed in side elevation. The concave outer surface has a radius of curvature (Rc). The core cowl has a distal end which is radially spaced from the outer surface of the primary plug by a distance (&Dgr;H) in a direction perpendicular to the central axis. The primary nozzle plug and core cowl define a ratio Rc/&Dgr;H between approximately 14 and 18. The distal end of the core cowl has a core cowl radius Rp with respect to the central axis.