Showing papers on "Ram air turbine published in 1986"

Multifunction power system for an aircraft

Abstract: The multifunction power system is a combination auxiliary power unit, environmental control system, engine start system, and emergency power system for an aircraft. The system is essentially a four-wheel auxiliary power unit comprising two compressors driven by one turbine by means of a common shaft and in addition a free turbine. The pressurized flow from the second compressor can be directed to parallel combustors and thereafter to the two turbines. A starter-generator and motor are coupled to the compressor drive shaft and the free turbine is used to power a generator and for engine starting. Ducts, heat exchangers, valves, etc., are so arranged as to provide the four functions by proper selection and routing of air.

Advanced integrated propulsion system with total optimized cycle for gas turbines

Abstract: A gas turbine system with integrated high and low pressure circuits having a power transmission for extracting work from one of the circuits, the volume of air and fuel to the respective circuits being varied according to the power demand monitored by a microprocessor, wherein the turbine system has a low pressure compressor and a staged high pressure compressor with a combustion chamber and high pressure turbine associated with the high pressure compressor, and, a combustion chamber and a low pressure turbine associated with the low pressure compressor, the low pressure turbine being staged with the high pressure turbine to additionally receive gases expended from the high pressure turbine and a microprocessor to regulate air and gas flows between the compressor and turbine components in the turbine system.

Cooled gas turbine operable with a controlled cooling air quantity

Abstract: A cooled gas turbine power plant has a compressor and a high pressure turbine connected to the compressor. The cooling air quantity for the turbine is controlled in response to instantaneous load conditions and in direct response to the cooling air quantity control of the compressor. This control of the cooling air quantity for the turbine is achieved by a direct mechanical coupling of a slide valve for the turbine cooling air control with the control of the compressor, whereby good power output values and low fuel consumption values are achieved for the high pressure turbine, especially under partial load operating conditions. The compressor may be controlled by an adjustment of the angular position of its guide vanes or blades or by an adjustment of the quantity of its discharge air.

A pneumatic hydro-electric power conversion system

Abstract: The invention provides for the generation of electrical power from low head water, such as the flowing water of rivers or the like, the electrical power is generated by passing the water in sequence over flexible bags (22, 24) or membranes to displace air under the flexible bags or membranes. The displacement of the air is utilised for the driving of a power generator such as an air turbine, and smooth power flow is achieved by diverting air displaced from the underside of one membrane into the cavity under the other membrane. The water flows over the membranes in sequence so that a self oscillating system is set up with the air being displaced back and forth from the cavities, and the displacement air being used to drive the air turbine. Preferably a bi-directional air turbine such as a Wells turbine is used.

Ram air turbine

Abstract: Complexity, and thus reliability difficulties, are avoided in a ram air turbine including a stationary shaft 14 defining an axis of rotation 16. A hub 24 is journalled on the shaft 14 and in turn movably mounts at least one blade 38 for positioning between a feathered position and a plurality of positions of different pitch. A selectively operable brake 96, 100, 116 is mounted on the shaft 14 and a screw 112 is journalled on the shaft for rotation about the axis 16. The screw has a head 114 engageable by the brake 96, 100, 116 and exterior, widely spaced threads 120. A governor plate 50 is disposed about the shaft 14 and includes a sleeve 124 with widely spaced internal threads 126 surrounding the screw 112. The governor plate is connected to the blades 38 to position the same in response to movement of the governor plate 50. A torsional spring 130 is connected to the screw 112 to effect rotation of the same when the brake 90, 100, 116 is disengaged.

Ultra-high-pressure rotary water jet gun

Abstract: An ultra-high-pressure rotary water-jet gun capable of removing rust, scale, burrs, paint film and other unwanted deposits from the surface of metal, concrete and other materials. An air turbine serves to rotate an eccentric rotor within the gun housing. A high pressure water line passing through the rotor is connected to a nozzle head on which are mounted several nozzle tips. The nozzle head is rotated in a circular path by the eccentric rotor while directing the high pressure water jets against the work piece. A pneumatic circuit and a hydraulic circuit with certain controls are provided.

Auxiliary power unit and gearbox assembly for a gas turbine

Abstract: 1. An auxiliary drive system comprising a transmission (2) for a gas turbine engine (1) in which an auxiliary gas turbine (4) delivers compressed air for driving the transmission (2) through an air turbine (3) coupled via a by-pass opening (10), the transmission system (2) driving auxiliary devices for the gas turbine engine (1) and/or an aircraft, such as a generator (11) comprising a shaft (19) and a hydraulic pump (14), and the transmission (2) being provided via a switchable coupling (13) with a power take-off for a rotor (15) of the gas turbine engine (1), characterised in that the auxiliary gas turbine (4) for driving the transmission (2) transmits energy only via compressed air to the air turbine (3) or the transmission (2), in the transmission (2) the energy from the air turbine (3) is first transmitted to the generator shaft (15), and the energy is transmitted to the remaining auxiliary devices via an auxiliary switchable coupling (12) by a shaft disposed in the transmission (2) behind the by-pass opening, seen in the direction of energy flow from the air turbine (3) to the generator (11), and the first coupling (13), which is provided for driving the rotor, is disposed (considered in the direction of energy flow from the air turbine (3) to the auxiliary devices) behind the second coupling (12) for connecting the shaft to the auxiliary devices, and is connected thereto.

Rotating speed control device of a rotary type electrostatic spray painting device

Abstract: A rotary type electrostatic spray painting device including a rotary shaft driven by an air turbine. A reflecting face portion and a non-reflecting face portion are formed on the rear end face of the rotary shaft. A rotating speed sensor is arranged adjacent to the rear end face of the rotary shaft to detect the rotating speed of the rotary shaft from light reflected from the reflecting face portion. The amount of pressurized air fed into the air turbine is controlled in response to the output signal of the rotating speed sensor so that the rotating speed of the rotary shaft becomes equal to a desired rotating speed.

Deployment-retraction apparatus for aircraft turbines

Abstract: The deployment-retraction device (10) hereinafter described is intended for a turbo-engine (12) of an aircraft to move the turboprop from a retracted position of non-operation within the aircraft to a deployed operating position outside of the aircraft and in the air stream of the aircraft, and is retractable from the extended position toward the retracted position. A piston and cylinder device (30, 32) is used for extending and retracting the air turbine or turbo-propeller. The piston is moved toward an extended position by a mechanical compression spring of great strength (34). The piston is moved to a retracted position by applying pressure of a fluid (82) in opposition to the compression spring. A locking and release mechanism (42) is associated in an effective manner to the piston to hold the latter in the retracted state and releasing the piston upon triggering of an electrical signal (68). The fluid pressure to retract the piston is applied in response to the triggering of an electrical signal (78). The fluid pressure also removes a locking pin (72) which maintains the piston in its extended position.

Gas turbine engine for aircraft

Abstract: In a gas turbine engine with a bypass duct, a rotating stage of airfoils (42) in the bypass duct is supported through and driven by torque transmitting members (84) extending across the core stream flow path, but which are sufficiently flexible in the radial direction to avoid passing centrifugal loads from the rotating stage (42) across the core stream flow path. The rotating bypass stream stage (42) is also supported through a bearing (52) secured directly to the engine main support structure radially outwardly of the core stream flow path. The majority of aircraft maneuver loads are reacted at this bearing (52), and a minor portion of the maneuver loads pass across the core stream to a bearing (85) located radially inwardly thereof. The airfoils (42) may be either variable pitch airfoils or fixed airfoils. If variable pitch, they may be used to reverse the flow in the bypass duct for thrust reversing.

Extra-high pressure water injector

Abstract: An ultra-high-pressure rotary water jet gun capable of removing rust, scale, burrs, paint film and other unwanted deposits from the surface of metal, concrete and other materials. An air turbine 30 serves to rotate an eccentric rotor 4 within the gun housing l. A high pressure water line l2 passing through the rotor 4 is connecte to a nozzle head 2l on which are mounted several nozzle tips 23. The nozzle head 2l is driven in a circular path by the eccentric rotor 4 while directing the high pressure water jets against the work piece. A pneumatic circuit and a hydraulic circuit with certain controls are provided.

Air turbine for preventing formation of ice on air exposed turbine parts

Abstract: An air turbine is provided and includes a stator having a guide wheel for moist air with guide passages placed between guide blade, a rotor having a runner and inner blade passages placed between the runner blades, and an annular intermediate space between the guide blades of the stator and the runner blades of the rotor. A control unit is provided for controlling the temperature of air to be supplied to the guide wheel. Wet or moist air may expand or cool down to temperatures that are considerbly below the freezing point of water without disturbance or prevention of the operation of the turbine by formation of ice on the faces of such turbine parts as are in contact with the air flow passing through the turbine.

Wave power generation unit with a symmetric wing turbine

Abstract: The utility model relates to a wave power generation device with a symmetric wing turbine, which belongs to the new design of a pneumatic wave power generation device with an air turbine. In the wave power generation device with a symmetric wing turbine, a novel symmetric wing turbine with a blade surface shape of a rectangle sector is designed according to the problems that the impulse turbine has complicated structure, the symmetric wing turbine with a blade surface shape of a rectangular can not obtain better combination property in general, etc. Besides, the utility model provides design parameters, such as the type of a wing, spray mouth ratio, hub tip ratio, the number of blades, etc., to make the newly designed device have simple structure, and better combination property, such as better self starting performance, high efficiency, etc. The utility model can be used for the long acting power supply for beacon lights, marine hydrology and automatic telemetering buoys for weather.

Control device for hand piece of air turbine

Abstract: PURPOSE:To enhance the processing characteristic of an arrangement in which an air turbine is provided on a rotary shaft, which bears a cutting tool for medical use, by furnishing a pressure or flow regulator valve in the exhaust passage in order to change the back pressure of the air turbine. CONSTITUTION:This hand piece 100 for air turbine used in dental care has such a construction that air turbine is borne rotatably in a head housing 111 through bearings, and a cutting tool T is held by a rotary shaft, which is made solidly as in a single piece with the turbine. The air turbine is driven by the compressed air supplied from a source 141 through an air filter 142 and an air feed line 116 equipped with pressure regulator valve 143, and the compressed air after its work is exhausted from the exhaust passage 117. Here the exhaust passage 117 is equipped with a flow (or pressure) regulator valve 144, and by throttling this valve the revolving speed of the air turbine is sunk as well as greater torque is provided.

High speed positive feed drill motor open loop control system

Abstract: A high speed positive feed drill motor open loop control system. The motor system comprises a minimally limited inertia air turbine motor including mounting guidance and control for enabling the drill to advance into the workpiece at a rate exactly proportional to the rotational speed of the drill. The turbine speed is measured with a digital tachometer while a stepper motor/ball screw mechanism is utilized to control and apply the feed rate.

Air-turbine generator system

Abstract: PURPOSE:To enhance the efficiency of a generator, by rotating an air turbine with the use of high speed air stream which is generated due to the pressure differential between two tanks connected respectively to the discharge and suction sides of an air compressor CONSTITUTION:A first tank 2 which is connected to discharge ports 1a, 1b of an air compressor 1 through pipe lines, is connected to a suction port 4a of an air turbine 4 through a valve 3 A discharge port 4b of the air turbine 4 is connected to a second tank 5 which is connected to suction ports 1c, 1d of the air compressor 1 Further, the air compressor 1 is reciprocated by means of, for example, wave power in such a condition that the valve 3 is closed, and therefore, the first tank 2 is set to be in a high pressure condition while the second tank 2 is set to be in a low pressure condition Thereafter, when the valve 3 is opened, the air turbine 4 is rotated by air which flows from the first tank 1 to the second tank 5 at a high speed, and therefore, a generator 7 is driven

Wave-energy absorbing converter

Abstract: PURPOSE:To convert the wave energy into the energy which can be utilized, by providing a float which moves up and down according to the tidal level, piston-cylinder apparatus which is installed onto the float and operated by waves, and an accumulator. CONSTITUTION:As for a wave-energy absorbing apparatus 10, a station 12 is arranged on the coast part, and an air accumulator 18 is arranged over the station 12. Said air accumulator 18 supplies the compressed air into the air turbine of a power generator 20 through a valve V1 and drives the air turbine. Under the station 12, a piston-cylinder apparatus 22 is arranged, and a wave-energy increasing and absorbing member 24 is installed at the lower edge of the cylinder 221.

Conversion of wave energy

Abstract: PURPOSE:To efficiently utilize the energy in dashing and retreat of waves by installing a plurality of wave-energy taking-in means so as to correspond to the variation of tide level CONSTITUTION:At least two units of wave-energy taking-in means 1 and 1' are arranged in the vertical direction in accordance with the sea surface on ebb and flow Suction check valves 8 and 8' and exhaust check valves 6 and 6' are arranged onto the respective taking-in means 1 and 1', respectively Air is inhaled and discharged from the air chambers 2 and 2' in the taking-in means 1 and 1' which vary in accordance with the movement of waves The upstream side of the suction check valves 8 and 8' is connected to a suction flow passage 9 Exhaust check valves 6 and 6' are connected to an exhaust flow passage 7 While, an air turbine 3 for driving an electric generator 10 is installed The exhaust flow passage 7 is connected to the suction side of the air turbine 3 and the suction flow passage 9 is connected to the discharge side Air is supplied through check valves 4 and 5

Useful resources recovering apparatus in utilization of wave-dissipating generation set

Abstract: PURPOSE:To improve energy efficiency by arranging two air-turbine type power generation ships in reversed truncated chevron-form with respect to the direction of advance of waves and connecting two power generation ships by an inclination plate inclined by an angle of 45 deg. or less with respect to the seal level. CONSTITUTION:Air-turbine type generation ships 1A and 1B are arranged in reversed truncated chevron-form with respect to the direction of advance of waves. Between the air turbine type power generation ships 1A and 1B, an inclination plate 2 is laid at an angle of 45 deg. or less with respect to the sea level so that the opened port side in reversed truncated chevron-form is set downward and the closed port side is set upward. A water tank 3 is installed above the inclination plate 2, and connected to a power generator 5 through a low water-head turbine 4. In the upper part along the inclination plates 2 of the air-turbine type power generation ships 1A and 1B, a number of air chambers 6A and 6B are installed and connected to the pipes 7A and 7B, and directly connected to a power generator through an air turbine.

Combined hot air and steam plant

Abstract: The steam generator (10) comprises a fluidized bed combustor (11), followed by a flue gas pass (14) adjoins. One of a Heisslufftturbine (20) driven air compressor (21) is connected to the hot air turbine outlet side through a fully fluidized bed (11) arranged air heat exchanger (15), the outlet of an exhaust boiler (30) is connected. A water-vapor separation vessel (50) is connected between one arranged in the steam generator (10) evaporator system (17,18) and a likewise arranged in the steam generator superheater (16). In Abluftkesset (30) is arranged a pre-superheater (33) communicating the inlet side with the water-vapor separation vessel (50) and the outlet side to the superheater (16). This causes the exhaust heat to reduce the pressure losses between the air compressor and Heissluftturbine with good utilization.

Radial gas turbine

Abstract: The radial gas turbine P3424853 is a turbine in which one part of the turbine wheel circumference is acted upon by combustion gas and the remaining part of the circumference by air. According to the invention its turbine wheel is of double-flow design and combustion gas and air are admitted to each flow in such a way that overall the full circumference of the turbine wheel is acted upon by combustion gas. It is not suitable as a motor vehicle power unit, however, because it does not yield constant power as the load increases. At extremely high combustion temperatures the combustion gases flowing out contain too large a proportion of pollutants. The object of the invention was to improve the power of the above-mentioned turbine and to further develop it as a low-emission power unit for motor vehicles. According to the invention a secondary turbine with secondary combustion chambers, which are connected by air connection pipes to the outlets of the compressor, is connected in a known manner to the outlet side of the turbine on a second shaft. The shaft journals of the turbine wheel are enclosed by high volume annular air ducts. It is intended for use as a low-emission power unit for motor vehicles.

Increase in Absorbed Wave Energy by the Phase Control for Air Flow on OWC Wave Power Device

Abstract: As one of the methods to increase in efficiency of wave energy absorption by the point absorber wave power generator, the phase control was proposed by K.Budal et al.[1]. It is the method to make the float of point absorber oscillate as same as under the condition of resonance in any sea condition. Authors applied this method to the oscillating water column (OWC) type device and investigated the optimum control method, the increase in efficiency and the effect on an air turbine generator [2][3]. The principal results of these studies are reported in this paper.

Improvements relating to hydro-electric power conversion systems

Abstract: The invention provides for the generation of electrical power from low head water, such as the flowing water of rivers or the like, the electrical power is generated by passing the water in sequence over flexible bags or membranes to displace air under the flexible bags or membranes. The displacement of the air is utilised for the driving of a power generator such as an air turbine, and smooth power flow is achieved by diverting air displaced from the underside of one membrane into the cavity under the other membrane. The water flows over the membranes in sequence so that a self oscillating system is set up with the air being displaced back and forth from the cavities, and the displacement air being used to drive the air turbine. Preferably a bi-directional air turbine such as a Wells turbine is used.

Optimization of Wave Energy Absorber of an Attenuator OWC Device with an Air Turbine

Abstract: The purpose of this paper is to establish the optimum design method of a combined system of a primary energy converter with a secondary energy converter of an attenuator OWC (Oscillating Water Column) device as a wave energy extractor which floats in waves, taking account of bottom plate and phase control.

Atmospheric heat generating system

Abstract: PURPOSE:To enable stable generation of power without requiring special heat source or mechanical power by continuing natural circulation of atmospheric air in a chimney through utilization of latent heat of water evaporated through the atmospheric heat thereby rotating a turbine and driving a generator CONSTITUTION:A heatexchanger 34 is coupled to the lower inlet of chimney 31 and the air to be sucked through an air take-in port 35 of the heatexchanger 34 is taken away of its latent heat by the water to be ejected through a carburetor 36 thus to lower the temperature but when passing through the heatexchanger 34, the air will absorb the heat from the outer air to rise the temperature upto the outer air temperature Said wet air will rotate an air turbine 32 for driving a generator 33 then rise through natural circulation in the chimney 31 consequently, the atmospheric pressure will drop to condense the steam in the set air thus to discharge the latent heat thereby the air in the chimney 31 is heated to the temperature higher than the outer air Natural circulation in chimney 31 is continued through said temperature difference thus to generate power

Starting inspection device for driven machine

Abstract: PURPOSE:To make something trouble at the time of revolving speed upping inspectable ever so earlier, by detecting time and revolving speed after generation of a starting command and thereby judging on whether the starting is proper or not, in case of compressed-air starting for a gas turbine. CONSTITUTION:There is provided with an air turbine which starts a gas turbine unit with compressed air. The time elapsed after generation of a starting command device 8 and a revolving speed signal out of a revolving speed detector 6 are taken into an input unit 41. Data of the input unit 41 and a memory 42 are calculated at an operation control unit 43, and the result is outputted to an output unit 44. Each detection of the time elapsed and the revolving speed after the command generation is carried out several times at intervals of the specified time, and when it fails to reach the specified speed set by a speed setter 31, it is judged there is something trouble. With this constitution, the trouble at the time of revolving speed upping is inspectable ever so earlier.