Abstract: In order to raise the degree of compression without unduly increasing the dimensions a compressor having at least two stages includes a first centripetal stage and a last centrifugal stage mounted upon the same shaft. The diameter at the centripetal stage inlet does not exceed the diameter at the outlet of the centrifugal stage and the air flows radially inwards in the first stage, and radially outwards in the last stage.

Abstract: In order to obtain a compact and serviceable gas turbine plant including a compressor and a turbine rotating about a common axis and further having at least one combustion chamber and an air preheater, the turbine and the compressor are spaced apart axially to provide a space for mounting the combustion chamber or for the gas discharge, respectively. The air-preheater is divided into at least two box-shaped units, each unit including at least two individually mountable exchanger elements. The power take-off with the pertaining reduction gear is located at the compressor end of the plant, leaving the turbine and heat exchanger easily accessible for servicing.

Abstract: The efficiency and the power output of a gas turbine power plant, to a large extent, depend upon the turbine inlet temperature (TIT). The strength of conventional metallic materials puts an upper limit to the TIT. Ceramic materials will withstand much higher temperatures, but their practically usable strength is considerably less than that of metallic materials.The strains imposed upon a rotor to a large degree is a function of the centrifugal stress and thus the peripheral speed. In order to secure simplicity of design the turbine driving the compressor rotor shall be mounted upon the same shaft as the latter, which means that the turbine will rotate at the same speed as the compressor.The specific power obtainable at, or consumable by, a rotor is approximately a function of the square of its peripheral speed, and in a conventional arrangement the turbine rotor usually has as somewhat smaller diameter then the compressor it drives, assuming that the compressor is the only power consumer.

Abstract: An automotive gas turbine which includes at least one power turbine rotor and at least one further turbine rotor driving at least one compressor, as well as a variable transmission for transferring energy from either of the rotors. The compressor rotor is made of lightweight material and the variable transmission is arranged in such a manner that the power transferring train from the transmission to the compressor rotor will obtain considerably less than moment of inertia than the power transfer train from the pertaining turbine rotor to the transmission. Last-mentioned portions of the power transfer train will thus form a rotatable body, the inertia of which is connectable to the compressor rotor, for instance, during starting or acceleration.

Abstract: In order to obtain a low-cost, light-weight automotive gas turbine plant, the latter is provided with a compressor operating on a first shaft and a turbine operating on a second shaft formed as an element separate from that of the rotor. An infinitely variable transmission interconnects the first and second shafts and ensures that sufficient power for any operational condition is transferred from the turbine to the compressor.

Abstract: The power plant of a crawler vehicle is a gas turbine having at least two turbine rotors interconnected by a variable transmission. One of the rotors is primarily intended for driving the tracks while the other rotor is intended primarily for auxiliary purposes, i.e. steering, operating the working tool and so forth, the variable transmission providing a way of transferring power from any of the rotors to the other, as operating conditions require.

Abstract: The cooling of a gas turbine is a critical problem and will consume a considerable quantity of compressed air at the temperature ordinarily available. To improve the cooling properties, a portion of the air delivered by the compressor is divided off and is conveyed to an expansion member, where it is further divided into a hot and a cold fraction. This cold fraction, which can have a temperature well below the freezing point, is used, preferably mixed with air delivered directly from the compressor, for cooling the turbine inlet means.

Abstract: In order to provide adequate space for bumpers and auxiliaries, the propulsion engine of a vehicle is arranged transversely with respect to the longitudinal axis of the vehicle. The engine is a gas turbine unit having its power take-off shaft parallel to its rotor axis. The power transmission to the wheels of the vehicle includes a differential located outside the engine and below the same, being connected to the power take-off shaft by a transmission including a reversing step.

Abstract: The invention relates to improvements in gas turbine plants by encapsulating the compressor and turbine means in a pressure proof casing, and by arranging the hot and cold process sections, respectively, at opposite ends of the casing, the power output shaft can be arranged in the cold section; the arrangement also permits excellent noise insulation possibilities, by arranging the output power means, e.g. an electrical generator or a hydraulic pump within the casing, rotating shaft sealing problems are eliminated.

Abstract: The parts of a gas turbine plant exposed to the highest temperature are made of ceramic material and are mounted by resilient clamping members permitting freedom for thermal movements. These clamping members are located in passages between spaces containing air and gas, respectively, with the air having the higher pressure. The clamping members are slotted to permit the flow of air through the passages in which they are mounted and will thus be effectively cooled.

Abstract: In order to raise the degree of compression without unduly increasing the dimensions a compressor having at least two stages includes a first centripetal stage and a last centrifugal stage mounted upon the same shaft. The diameter at the centripetal stage inlet does not exceed the diameter at the outlet of the centrifugal stage and the air flows radially inwards in the first stage, and radially outwards in the last stage.

Abstract: An outlet diffusor for a centrifugal compressor built up from two planar discs and a number of elements shaped as segments of a circle interposed therebetween; each element is defined by two opposed shaped edge faces, which together with corresponding faces in adjacent segments form tubular passages in the diffusor; the geometrical form of these passages may be varied by altering the cross section of the channels or the spacing between the segments, and by mounting the segments so they are angularly adjustable so that the flow characteristics of the diffusor may be altered and during use.