Abstract: The invention concerns a device for a submersible machine, such as a pump, a turbine or a mixer. The machine includes a driving unit (1) and a hydraulic unit (2) having an impeller connected to the driving unit via a rotary shaft (3). In order to prevent the medium in the hydraulic unit from entering the driving unit along the driving shaft, an intermediate seal device is arranged. The seal device includes two mechanical face seals (5) and (6) and an intermediate room (7) containing barrier liquid. In order to prevent possible leaking barrier liquid from damaging the shaft bearing (4), a storage tank (9) for collecting said liquid is arranged within the room (7).

Abstract: An apparatus for increasing the flow of liquid in a conduit provides a barrier positioned in the conduit to prevent flow of liquid past the barrier in a lower region and defining a gap region above that lower region and adjacent the barrier. A duct having a first end for positioning within the lower region of the conduit upstream of the barrier and a second end for positioning in the gap region of the conduit to direct the flow of liquid through the duct from an area upstream of the barrier through the gap region to an area downstream of the barrier. An air pump communicates with the duct to force air into the first end of the duct under sufficient pressure to mix with water in the area of the first end of the duct and rise with the water through the duct and out the second end of the duct to the downstream side of the barrier. A plurality of apparatuses may be located at pre-determined intervals along the conduit.

Abstract: An apparatus for moving fluid from a first location to a second location comprises a housing containing a pump body having a central passageway with a fluid inlet and first and second fluid outlets in communication with the passageway. A shuttle having first and second fluid chambers is movable within the passageway of the body between first and second positions. First, second, third, and fourth generally annular shaped fluid passageways provided in the shuttle permit selective fluid communication between the first and second fluid chambers of the shuttle and the inlet and outlet ports of the pump body. First and second inlet passageways provided in the shuttle permits selective fluid communication between the inlet of the pump body and the first and second fluid chambers of the shuttle. A piston is reciprocally movable within the shuttle chambers by a uniquely configured operating mechanism, such as a cam ring.

Abstract: In a swash plate type compressor, a rotational shaft makes a piston reciprocate through a swash plate. A suction valve plate is connected to an eccentric portion of the shaft and caused to orbit around an axis of the shaft by rotation of the shaft. Friction between the suction valve plate and a contacting end wall in which a suction port is formed naturally suppresses the rotational motion of the valve plate. Therefore, the valve plate substantially orbits about the shaft axis without rotating and opens and closes the suction port. A relative velocity between the valve plate and the end wall when the valve plate orbits without rotating is smaller than when the valve plate only rotates.

Abstract: A pressure/vacuum generator is established by coupling the pressure port of a vacuum generator to an air pressure source while coupling a valve in fluid communication with the exhaust port of the vacuum generator. When the valve is in a normally open condition (i.e, the exhaust vented to atmosphere), the vacuum port of the pressure/vacuum generator generates a vacuum. When the valve is closed, thereby closing off the exhaust port, the vacuum port becomes a pressure port. Thus, this pressure/vacuum generator can be used in any number of fluid (liquid and gas) systems (e.g., fluid recovery system, fluid transfer system, etc.)that require both a pressure source and a vacuum source while using a minimum number of components.

Abstract: A power generating method that includes the steps of burning a reformed fuel in the presence of air in a combustor of a gas turbine to generate a hot exhaust gas is disclosed. The hot exhaust gas is then passed through a turbine section of the gas turbine to generate power and, thereafter, the hot exhaust gas is passed through a heat recovery system where the hot exhaust gas is successively cooled as it passes through a series of heat exchangers. Heat exchangers comprising the heat recovery system include combustion air pre-heater(s); a thermochemical recuperator (or reformer), wherein hot exhaust gas provides the endothermic heat of reaction necessary to reform a raw fuel/steam mixture to the combustible, reformed fuel that is eventually burned in the combustor; and one or more water/steam heaters which supply steam to a low-pressure, condensing steam turbine of a bottoming Rankine cycle to generate additional power.

Abstract: A piston pump for a slip-controlled hydraulic brake system for a vehicle. A tubular filter is mounted on a bush of the piston pump; the filter has a filter ring that forms a guide ring and is spaced apart from the bush and axially guides the piston by a part of the piston that protrudes from the bush. A separate guide ring is dispensed with, and the structural length of the piston pump can be shortened.

Abstract: A recirculation passageway for a turbine engine provides stall protection in a booster by directing high pressure airflow from a flow path of the booster to the passageway. The high pressure airflow loses energy and decreases in pressure while traveling through the passageway until re-entry into the booster flow path. The airflow recirculates in the passageway until the airflow is discharged through a high pressure compressor.

Abstract: A high efficiency blower (14) includes a body (18) having an inner venturi surface (22) aligned with a flow axis (38) through the body. A motor/fan assembly (36) includes a motor (42) and a fan blade assembly (46) mounted to a shaft (48) extending from the motor. Several flow-straightening supports (40) support the motor/fan assembly within the body and locate the fan blades at the throat (28) of the venturi surface. High efficiency is created by mounting the motor fan assembly within the venturi surface and by the use of the flow-straightening supports. The high efficiency blower may be used as a part of a relatively simple, inexpensive, self-contained soil remediation system (2) which requires no external source of power and very little upkeep.

Abstract: A method for lifting liquids with airlift consisting of a lift pipe having a suction port, a discharge port, and an air feed including steps of (a) feeding air into the lift pipe, (b) sucking liquid in the suction port, (c) discharging liquid and air at the discharge port, and (d) inducing rotational motion of liquid at the discharge port, whereby the efficiency of said airlift is increased and splashing and heisering are eliminated. An airlift apparatus with means for inducing rotational motion at the discharge port is also provided. The means for inducing rotations can be an inclined flat or curvilinear baffle.

Abstract: A vacuum pump, such as a turbomolecular pump, a molecular drag pump or a hybrid pump, is adapted for use with a backing pump. The vacuum pump includes a housing having an inlet port and an exhaust port for coupling to the backing pump, one or more vacuum pumping stages disposed in the housing, each of the vacuum pumping stages having a stationary member and a rotating member, and a gas turbine. The gas turbine includes a gas inlet, a gas outlet coupled to the exhaust port, and a rotor coupled to the rotating members of the vacuum pumping stages. A gas flow, produced by the backing pump, through the gas turbine causes the rotor and the rotating members of the vacuum pumping stages to rotate, wherein gas is pumped by the vacuum pumping stages from the inlet port to the exhaust port.

Abstract: A single headed piston type refrigerant compressor having a cylinder block forming therein a plurality of cylinder bores receiving a plurality of single-headed pistons for reciprocation therein, and a front housing joined to the cylinder block to define a crank chamber for receiving therein a cam plate. An extended bore-forming portion of the cylinder block having partial cylindrical guide surfaces each being continuous with the corresponding cylinder bore and capable of being in slide contact with the piston head portion of the single-headed piston and the outer circumference of a shoe-holding portion of the single-headed piston is formed by extending a peripheral portion of a front end of the cylinder block into the crank chamber. A projecting portion formed on each single head piston protrudes from a side end surface of the shoe-holding portion extending behind the piston head portion into the crank chamber.

Abstract: Plurality of fuel nozzles X1 and X2 in combustor X are supplied with fuel gas from fuel gas system and fuel oil from fuel oil system, respectively. Gas turbine operation is done with fuel being changed over to either gas or oil. Fuel oil distribution control system A controls oil flowing into plurality of fuel pipings. When oil is changed over to gas, fuel oil purge system B is supplied with air of appropriate temperature and pressure from purging air supply system C. This air flows into fuel oil pipings and nozzles X2 for purging residual oil therein. Fuel nozzle wash system D is supplied with water by-passing from wash water tank for compressor washing. This water flows through nozzles X2 for washing thereof.

Abstract: This invention discloses a method for limiting a critical variable (such as, discharge pressure or suction pressure or pressure ratio) of either a compressor station or an individual compressor when these machines are subjected to large, fast disturbances. Each configuration, whether a station or an individual compressor, is equipped with two PID controllers: (1) a main controller for compressor critical variables and (2) a limiting controller that participates in modulating recycle valves. At the onset of sudden, large changes of mass flow at a compressor's or station's discharge, the effectiveness of the two controllers (acting independently) may be insufficient to prevent discharge pressure from reaching the shutdown set point which, in turn, disrupts the process supported by the compressors, and the longevity of the drivers is diminished. For these reasons, this disclosure relates specifically to a technique that combines the functions of the main and limiting controllers.

Abstract: A pulse plasma thruster (50) utilizes a vapor producing solid (54) and a micro-sized heater (52) to produce a high pressure vapor that is directed into an ignition chamber (58) and to a thrust discharge chamber (70). The thrust discharge chamber (70) comprises two oppositely disposed electrode plates (72, 74) and oppositely disposed fuel propellants sources (60, 62). The passageway (56) leading from vapor producing solid (54) to the thrust discharge chamber (70) is configured to permit uniform feeding of the vapors to the thrust discharge chamber (70). A pair of electrode terminals (82, 84) extend from the electrode plates (72, 74) and through a housing (88). A power source (100) is coupled to the terminals (82, 84) and provides the ignition signals necessary to cause a spark and a breakdown to a useful plasma arc by controlling the voltage-current shape of the ignition signal.

Abstract: A load sensing hydraulic control system for use in a work machine and adaptable for controlling the displacement of a variable displacement hydraulic pump. The control system includes a signal duplicating valve connected in fluid communication with both the pump controller and a fluid pressure source, and a sensor positioned and located for sensing the fluid pressure to the pump controller and outputting a signal to the controller indicative thereof. In response to signals received from the at least one sensor, the controller outputs a representative signal to the signal duplicating valve indicative of the highest pressure sensed by the at least one sensor, the signal duplicating valve being thereafter operable to allow fluid flow to pass therethrough to the pump controller.

Abstract: A variable displacement compressor includes a swash plate, which is rotatably supported on a drive shaft in a crank chamber. The crank chamber is connected to a discharge chamber through a pressurizing passage. An electromagnetic control valve is located in the pressurizing passage. When the control valve opens the pressurizing passage, pressure in the crank chamber increases and inclination of the swash plate decreases. When the control valve closes the pressurizing passage, the pressure in the crank chamber decreases and inclination of the swash plate increases. A fixed restrictor is located in the pressurizing passage. When the control valve suddenly opens the pressurizing passage, the fixed restrictor limits the flow rate of gas in the pressurizing passage so that the pressure in the crank chamber gradually increases. Accordingly, the inclination of the swash plate gradually decreases, thus reducing vibration and noise.

Abstract: A variable displacement type refrigerant compressor including a compressor housing having internally a compressing mechanism for compressing a refrigerant, a displacement varying mechanism for adjustably varying an amount of the refrigerant compressed and discharged by the compressing mechanism, and a displacement control valve unit controlling the operation of the displacement varying mechanism, which is an assembly of a pressure sensing mechanism formed by a flanged bellows element, a valve element, a valve seat having a port cooperating with the valve element, and a valve rod engaging the pressure sensing mechanism with the valve element, and are assembled by using a fixing screw member and a jig tool in position in a pressure sensing chamber, a valve chamber, and a valve rod bore coaxially formed in the compressor housing by drilling or boring from two sides of the compressor housing.

Abstract: A pipeline duct through a discharge opening (17) of a vane support housing (1) and an opening (6) in an outer wall (3) of a compressor housing of a gas turbine. The upper part of the pipe (2) is firmly clamped with a flange (14) and seals (7) between the bleeder connection (15) and the outer wall (3) by means of fastening elements (16). The lower part of the pipe (2) is sealed by a piston ring (8). The piston ring (8) is guided by two fastening rings (9, 10), which are mounted in the vane support housing (1) by fastening elements (16). The fastening rings (9, 10) make possible a free movement of the pipe (2) and the housing (3) in relation to the vane support housing (1) in the horizontal direction due to their free spaces (11, 12, 13).

Abstract: A propulsion system or aircraft engine for a helicopter or other aircraft includes an aerodynamic pod with a forward facing inlet for receiving a flow of ram air and a rearwardly facing exhaust or outlet. The system also includes a vertical shaft and one or more rotatable turbine assemblies mounted on the vertical shaft. Each of the turbine assemblies includes an inner compressor section having a plurality of blades with a first pitch and an outer turbine section having a plurality of blades at a reverse pitch. The compressor and turbine sections both forming part of a single disk or wheel. The system also includes a fuel injector for injecting fuel into the combustion chamber and an igniter for igniting the fuel air mixture within the chamber. A housing or channel directs the ram air through an angle of about 90° and through the compressor section and into the combustion chamber.