Abstract: Accordingly, the present invention provides a ducting system for use on a gas turbine engine having two fans connected to a common shaft, and includes a primary inlet duct that is integral with a plurality of primary discharge ducts, a plurality of secondary inlet ducts that are integral with a secondary discharge duct, each of the ducts includes a port, the ports of the secondary inlet ducts are located radially outward of the port of the primary inlet duct, and the ports of the primary discharge ducts are located radially outward of the port of the secondary discharge duct.

Abstract: An air feeding device for endoscope system includes an air compressor that compresses air and feeds the air in a sealed space, and a pressure sensor that detects air pressure in the sealed space. Further, a pressure setting device and a pressure controller are provided. The pressure setting device is used for setting a pressure value to be achieved in the sealed space, and the pressure controller turns ON and OFF the compressor in accordance with the air pressure detected by the pressure sensor and the pressure value set by the pressure setting device. The air feeding device has a main valve. An inlet of the main valve is connected to the sealed space, and an outlet of the main valve is connected to an outlet of the air feeding device. By opening the main valve, the air enclosed in the sealed space is discharged from the outlet to strike an object at a certain pressure.

Abstract: A radial-piston pump has at least one delivery unit with a delivery element. A pump casing is provided which has a first accommodation space for a medium to be delivered and a second accommodation space for a lubricant, the pump casing further has an eccentric side and a casing side. A separating device separates the first accommodation space and the second accommodation space from one another. The separating device has a first sealing element disposed fluid-tightly on the casing side of the pump casing and a second sealing element disposed on the eccentric side and connected fluid-tightly with the first sealing element. A shaft bearing configuration is disposed in the pump casing and supports an input shaft having an end portion. An eccentric element is disposed on the end portion of the input shaft. The second sealing element is disposed so as to be capable of sliding in a circumferential direction of the eccentric element.

Abstract: The hydraulic pump, in particular the hydraulic pump of an electro-pump unit, of a type comprising a pump body enclosing a gear pump and provided with a suction aperture for aspirating a low pressure liquid and an outlet chamber for driving back a high pressure liquid, which communicates with a high pressure outlet channel connected to a user hydraulic circuit, and a hydraulic capacity for dampening of pulses generated by the pump and equipped with deaerating means for a draining of air able to be trapped therein, the deaerating means being formed by the high pressure liquid that is driven by the pump back into the outlet channel.

Abstract: A floor air pump comprises an outer tube, a pressure leaking device, a pressure gauge, and an air discharge tube. The outer tube is provided with two cylinders different in size from each other. The pressure leaking device is disposed in the lower end of the outer tube and is provided in the interior thereof with a receiving compartment in communication with the large cylinder. The receiving compartment is provided with a pressure leaking slide block, and at least two leakproof rings to keep the inner wall of the receiving compartment in the airtight state. The pressure leaking slide block is provided with an annular groove for forming a channel along with the pressure leaking slide block. The receiving compartment is provided therein with a spring to provide the pressure leaking slide block with a recovery force. The pressure gauge is disposed in the outer side of the outer tube such that the pressure gauge is in communication with the interior of the outer tube.

Abstract: A rocket engine nozzle with an outlet portion having a curved profile in axial section. In order to control the flow separation occurring within the nozzle outlet, the radius of the outlet portion, in axial section, varies circumferentially in length.

Abstract: A scroll for a gas turbine having a compressor for generating compressed air and a combustor for receiving the compressed air and generating combustion gas of high temperature, the scroll includes a scroll main body having a predetermined space in which the combustion gas of high temperature supplied by the combustor can flow; and a scroll housing encompassing the scroll main body and separated a predetermined distance therefrom, wherein a path through which compressed air flows is formed between the scroll main body and the scroll housing, and the compressed air flows in the path, wherein one end of the path is connected to an outlet of the compressor and the other end thereof is open toward the combustor. Thus, as the amount of air flowing to cool the scroll sharply increases, an increase in the temperature of the scroll is prevented and the efficiency of cooling and durability of the scroll can be improved.

Abstract: An electric air pump having multiple impellers parallel mounted on the same motor shaft and typically employed for providing a source of low pressure, high volume air for charging inflatable devices. The multiple impellers provide improved motor efficiency in heat dissipation and air volume delivery when compared to a single impeller motor operating at the same RPM, and exhibits a near zero True Indicator Reading (TIR). In its most fundamental embodiment, the electric air pump having multiple impellers exhibits a construction including an outer housing having an air intake port and an air exhaust port. An electric motor is mounted within the outer housing and includes a rotating output shaft. A plurality of air impellers each parallel mounted on the rotating output shaft is employed for drawing a volume of air through the air intake port and across the electric motor.

Abstract: A thruster system includes a power supply and a pulse forming circuit coupled to the power supply. The pulse forming circuit includes a capacitor and first and second diodes. The positively-charged plate of the capacitor is coupled to the anode of the first diode, the negatively-charged of the capacitor is coupled to the anode of the second diode, and the cathode of the first diode is coupled to the cathode of the second diode. A low-impedance thruster is coupled in parallel to the second diode.

Abstract: A gas turbine generally comprises a compressor, a combustor and a turbine body operatively connected to the compressor through a rotation shaft, and the turbine body is composed of a plurality of rotors formed with turbine. discs and movable blades which are arranged in plural stages along an axial direction of the turbine body, in which a rear shaft is connected to a downstream side of a final stage disc of the turbine discs so as to extend rearward from the final stage turbine disc and supported by means of a bearing. The rear shaft is formed with a cooling medium supply passage for supplying a cooling medium to the turbine disc and a cooling medium recovery passage for recovering the cooling medium from the turbine disc, and a further cooling medium passage is formed between the rear shaft and either one of the cooling medium supply passage and the cooling medium recovery passage.

Abstract: An in-line axial piston hydraulic pump has a cylinder block with a plurality of bores in which separate pistons slide. The cylinder block is supported on one side by a bearing and axle arrangement. The other side of the cylinder block has an integral shaft with a ball that is received in a spherically concave socket coupled to the housing. The socket provides a drive surface that is non-orthogonal to the rotational axis of the cylinder block and the pistons ride against that surface. The engagement of the pistons with that socket surface produces the sliding movement of the pistons within the bores and thus the pumping action.

Abstract: Disclosed is an air-tight type reciprocating compressor which can decrease discharge pulsation to reduce the vibration of a discharge line as well as to reduce an overall value in a high-frequency band as a problem frequency. The compressor, which has case members, each of which being coupled on the lower parts of a block, for receiving discharge refrigerant flowing through at least two discharge holes on the block, a connecting pipe which is adapted to communicate with the case members, and a discharge pipe which is connected to one of the case members, includes one of the at least two discharge holes having the larger diameter by at least 50-70% than that of the other which is installed on the case member to which the discharge pipe is connected.

Abstract: A combustor includes outer and inner liners joined at one end to an annular dome. A swirl cup is mounted to the dome and includes a flare cone extending therethrough. The flare cone has an obtuse flare angle for discharging fuel in a wide spray from an outlet of the cone. A flared beat shield surrounds the cone, and extends in part aft from the cone outlet, and is offset in part forwardly from the cone outlet to define a radially outwardly facing step.

Abstract: A scroll compressor has a shell within which is positioned a frame. The frame is supported by a base portion of the shell to prevent axial movement of the frame with respect to the shell. A motor stator, a main bearing housing and a lower bearing housing are each positioned within the shell by engagement with the frame. A drive member which includes a motor rotor is rotatably supported by both the main bearing housing and the lower bearing housing. The frame, by positioning the motor stator, the main bearing housing and the lower bearing housing, allows the “air gap” between the motor stator and the motor rotor to be accurately controlled.

Abstract: A piston pump for a hydraulic brake system for a vehicle with a slip control system. For economical production, the piston pump includes a piston as a composites part with a core of steel that is surrounded by a lubricant jacket of plastic. By way of example, the lubricant jacket is applied to the core by spray-coating, or is pressed onto the core or slipped onto the core. The lubricant jacket economizes by dispensing with expensive post-machining of the piston surface by grinding, for instance, and improves the sliding properties of the piston.

Abstract: A variable length pre-mixer assembly comprises an upstream end for receiving compressed air from a compressor and a downstream end disposed in flow communication with a combustor. Pre-mixer assembly comprises an upstream forward clamp, a swirler assembly having a plurality of circumferentially spaced apart vanes disposed adjacent the upstream end for swirling compressed air channeled therethrough. An elongate centerbody has a first end joined to and extending through the swirler and a second end disposed downstream therefrom. A downstream fuel nozzle shroud has an outlet in flow communication with the combustor. Additionally, at least one removably disposed fuel nozzle spacer is alternatively disposed between a first position between the upstream forward clamp and the swirler assembly and a second position between the swirler assembly and the downstream fuel nozzle so as to change the relative position of the swirler assembly and alter the pre-mixer assemblies acoustical resonance characteristics.

Abstract: A rotor system for a rocket engine comprises a first hollow shaft portion and a surrounding annular duct. The interior of the first hollow shaft portion is adapted to receive a first propellant component, and is in fluid communication with a first rotary orifice. The annular duct is adapted to receive a second propellant component, and is in fluid communication with a second rotary orifice located proximate to the first rotary orifice. The rotor system further comprises a third rotary orifice operatively connected to second hollow shaft portion and in fluid communication with the interior of the first hollow shaft portion for discharging a second portion of the first propellant component at second location. The rotary orifices are operatively connected to respective rotary pressure traps that isolate the pressure at the respective rotary orifices from the respective inlet pressures of the respective propellant components.

Abstract: The invention relates to a piston pump, in particular for an antilock and slip-controlled vehicle brake system. In order to embody a filter, the invention proposes providing a bushing of the piston pump with a bushing that encompasses it, wherein the bushing has beads on its ends, which are provided with grooves after the fashion of a knurling, through which incoming brake fluid flows between a wall of a pump bore and the bead into the piston pump and is therefore filtered.

Abstract: A combustor liner includes a row of primary dilution holes disposed aft of a forward end thereof, and a row of secondary dilution holes disposed between the primary holes and an aft end of the liner. The secondary holes vary in size circumferentially to a maximum size offset circumferentially from the primary holes.

Abstract: In a method for reliably removing liquid fuel from the fuel system of a gas turbine after shutting down the same, in the case of which fuel system liquid fuel is fed via at least a first feeder line in normal operation of the gas turbine to a burner and injected there into a combustion chamber via fuel nozzles, a high reliability against explosion and coking is achieved in a simple way by virtue of the fact that the liquid fuel is flushed from the fuel system by the use of an inert auxiliary medium.