Showing papers on "Ram air turbine published in 1979"

Wave powered generator

Abstract: A machine that includes a tank in which air is compressed so the air is used to drive an electricity generating mechanism that includes an air grinder or air turbine powering an alternator in an electric circuit, and the air compressor being driven by natural forces such as ocean waves

Gas turbine power plant with air reservoir and method of operation

Abstract: A gas turbine power plant is disclosed which uses gas turbine engine components in conjunction with an air reservoir and a motor-generator. The compressor unit has low pressure, intermediate pressure and high pressure compressors and control valves which allow operation of the low pressure compressor by a low power auxiliary motor during starting while the other compressors do not absorb significant power. The power plant can operate by the motor-generator to charge the reservoir, can operate on the air cell with a turbine during peak load, and can function as a conventional gas turbine installation when the air reservoir is exhausted.

Method and apparatus for operating a cross-compound turbine generator plant

Abstract: A cross compound turbine apparatus and method of operating the same wherein the apparatus includes a first turbine generator having a high pressure turbine and a first low pressure turbine connected to a first generator driving shaft, with the second turbine generator having an intermediate pressure turbine connected to a second generator driving shaft. Driving steam is supplied to the high pressure turbine and a primary steam line communicates exhaust steam from the high pressure turbine to drive the intermediate pressure turbine during a steady state operation of the first and second turbine generator sections. A bypass steam line communicates steam from the system supplying driving steam to the high pressure turbine to the intermediate pressure turbine in a bypassing relationship to the high pressure turbine. A control arrangement controls the flow of steam in the primary and bypass steam lines during a starting operating of the turbine generator sections, with the control arrangement being adapted to maintain the relative speeds of the first and second generator driving shafts in a predetermined synchronsis ratio. A controllable vent arrangement is provided for venting a portion of the steam flow in the primary steam line during starting operations. By virtue of these features, a speed synchronization of multiturbine sections can be obtained in an efficient and inexpensive manner without causing excessive heat rise in the turbine blades.

Air-powered vacuum cleaner floor tool

Abstract: An air-powered vacuum cleaner floor tool and an air turbine therefor are provided. The floor tool comprises a housing with a rotary agitator mounted on the bottom thereof, and a wand connector means mounted on the rear thereof and aligned with the longitudinal center of the housing. The wand connector is used for connecting the floor tool to a vacuum cleaner wand. The air-powered turbine motor has a turbine chamber and a rotor mounted on the housing, with the turbine chamber having an air inlet and an air outlet. The air inlet is aligned with the longitudinal center of the rotary agitator, and the air outlet is aligned with the longitudinal center of the housing and with the wand connector. The air outlet includes an outlet opening in the turbine chamber. The angle which is formed by the center line of the air inlet of the air-powered motor, and the center line of the outlet opening of the turbine chamber, is less than 55°. Further, the turbine rotor is rotatably mounted in the turbine chamber so that the smallest area between the outer periphery of the rotor and the wall of the turbine chamber is equal to substantially one-half of the area of the outlet opening of the turbine chamber.

Mannmade fishing bank and wave force power generating system combination

Abstract: PURPOSE:To provide a combination of man-made fishing bank of a framework structure with a wave force power generating system installed on its top. CONSTITUTION:A man-made fishing bank-wave force power generating system combination comprising a framework structure 1 having a truss of rigid frame parts 1a to 1c with an artificial sea weed 8 attached thereto is submerged several meters under the ocean surface at predetermined fishing ground with buoys 5 and 6 installed thereto to form a fishing bank, said framework structure 1 being provided with an equipment chamber 2 containing a float type wave force power generating system and other necessary facilities, said power generating system installed in the equipment chamber 2 being of a type, for example, having an air turbine driven generator running on a compressed air supplied from an air compressor driven by vertical movement of a float corresponding to the wave surface motion. This combination provides a wave force power generating system with ease of maintenance and safety and highly productive man-made fishing bank.

Air turbine nozzle

Abstract: PURPOSE:To provide an air turbine, highly efficient and capable of minimizing vibration and noise, in which impellers or runners, each having a multiplicity of vanes with one ends opened and the other ends closed, are coupled together by the intermediary of a separator plate, in the manner that their open ends face toward each other. CONSTITUTION:A multiplicity of vanes 17, 18 are arranged along the axis of turbine. These vanes 17, 18 are provided respectively on right and left impellers or runners 14 and 15, one ends of which are opened and the other ends of which are closed, and a separator plate 16 is disposed between these two impellers 14, 15. Arrangement of these impellers is such that top ends of these vanes 17, 18 may not be in line with each other, and when the impeller 14 and 15 are coupled together by the intermediary of separator plate 16, vane chambers D, E are separated completely from each other by means of separator plate 16, so that communication between these chamber may be prevented positively. Thus, turbine output can be raised since air flow is stabilized by the function of separator plate 16, and at the same time noise can be minimized since vanes 17, 18 are displaced from each other.

Two-phase turbine engines

Abstract: A description is given of a two-phase turbine which utilizes a uniform mixture of gas and liquid accelerated in nozzles of the types reported by Elliott and Weinberg (1968). The mixture acts directly on an axial flow or tangential impulse turbine or is separated into gas and liquid streams which operate separately on a gas turbine and a hydraulic turbine. The basic two-phase cycles are examined, taking into account working fluids, aspects of nozzle expansion, details of turbine cycle operation, and the effect of mixture ratio variation. Attention is also given to two-phase nozzle efficiency, two-phase turbine operating characteristics and efficiencies, separator turbines, and impulse turbine experiments.

Overspeed preventing method and its apparatus for waveforce generator

Abstract: PURPOSE:To prevent the overspeed of a generator by arranging an emergency throttle valve in the air passage of an air turbine and controlling the air flow rate when the speed of the air turbine or wave height reaches over each setting valve CONSTITUTION:An opening and closing apparatus for emergency throttle valve consists of an emergency throttle valve 32, valve shaft 33, driving apparatus 34, and a speed detector 37 such as a tachogenerator The emergency throttle valve 32 for controlling the air stream 35 is arranged in an air passage communicating to an air turbine 31, and the revolution speed is detected by a detecting apparatus 37 directly connected to the top of a turbine generator 16, and the throttle valve 32 is opened and closed by the driving apparatus 34 to control the flow rate of the air 36, and thus the air turbine 31 and the generator 16 are controlled

Deriving power from wave energy

Abstract: A device for extracting energy from wave energy and comprising a plurality of chambers adapted for pressurizing and discharging a working gas, means for collecting the pressurized working gas, and a mechanical device such as an air turbine to which the collected pressurized working gas is conducted to extract energy therefrom and drive a device such as an electric generator.

[Studies on the performance of the dental air turbine handpieces. (Part 1). Air pressure and bur length to be influenced over the rotational performance of the air bearing type handpieces (author's transl)].

Abstract: Air turbine handpieces are used as the dental cutting instruments for the clinical use and many appliances. But, there are no studies on the performance of air turbine handpieces. So, this paper shows the rotational performance of air turbine handpieces which are influenced over the supplying air pressure and cutting bur length. Experimentally used air turbine handpieces is air bearing type and it's set up air pressure to be supplied is 3.5 kg/cm2. So, in this experiments, the range of air pressure is 1.8 approximately 3.5 kg/cm2, which is established five stages. And the bur length of the rotational parts is 5 approximately 9 mm with five steps. As the results, the rotational performance of air handpieces are influenced over these factors of the air pressure and the bur length. And air pressure to be supplied are influenced to be not only over the rotational speed but the load for the putting a stop to the revolutions.