Abstract: The invention relates to a plain bearing device having a primary sliding surface between a first pair of concentrically arranged structural elements, wherein, in a normal operating state, a relative rotational movement between the structural elements along the primary sliding surface is possible, characterized by at least one secondary sliding surface between a second pair of concentrically arranged structural elements, wherein a coupling means, in the normal operating state, prevents a relative rotational movement between the second pair of structural elements, and wherein, if a predeterminable event occurs, the coupling means is automatically releasable, such that a relative rotational movement between the second pair of structural elements along the at least one secondary sliding surface is made possible. The invention furthermore relates to a method for operating a plain bearing device, and to a gas turbine engine.

Abstract: An arrangement for detecting a shaft break, including a shaft and a reference shaft that can be rotated together with the shaft, wherein an opening in the shaft overlaps with an opening in the reference shaft in an operational state of the shaft according to the intended use, and a signal conductor that can be severed extends through the two openings and is operatively connected to an evaluation unit, and the evaluation unit is configured to detect a severing of the signal conductor by applying a signal to the signal conductor to detect a shaft break of the shaft. The invention further relates to a turbomachine and a method.

Abstract: A method for determining damage, wear and/or imbalance in a transmission configured as a gear transmission, particularly an epicyclic transmission, by means of at least one electronic sensor apparatus, wherein, while the transmission is operating, ensemble averaging is carried out automatically and periodically for measured values or measured value profiles ((P1,n)*Sew,i) which are acquired repeatedly in a phase-synchronous fashion at a measuring point, in order to determine an ensemble average (<s(w)ref>P1,n) for the measuring point.

Abstract: A device for monitoring a device with a sliding bearing device with a static element for an element movable in a rotatory manner relative to the static element. The movable element has a device for generating a magnetic field and the static element has at a sensor device for detecting the magnetic field, in particular a time-varying magnetic field, wherein data of the magnetic field that is detected, in particular in a contact-free manner, by the sensor device can be transmitted to a data processing device, and a statistic for a spatial arrangement of the static element relative to the movable element can be determined with the data processing device based on the detected data. The invention includes a method for monitoring the device with the sliding bearing device.

Abstract: An arrangement for detecting a shaft break, including a shaft and a reference shaft that can be rotated together with the shaft, wherein an opening in the shaft overlaps with an opening in the reference shaft in an operational state of the shaft according to the intended use, and a signal conductor that can be severed extends through the two openings and is operatively connected to an evaluation unit, and the evaluation unit is configured to detect a severing of the signal conductor by applying a signal to the signal conductor to detect a shaft break of the shaft. The invention further relates to a turbomachine and a method.

Abstract: It is provided an arrangement for detecting a shaft break. The arrangement comprising a shaft, a bearing on which the shaft is mounted so as to be rotatable about a rotational axis, a force sensor which is arranged on the bearing and is configured to measure an axial force component, applied by the shaft, in parallel with the rotational axis of the shaft, and an evaluation unit which is configured to receive measured values of the force sensor and to determine, on the basis of comparison of a plurality of measured values, whether there is a change in the axial force component, in order to detect a shaft break of the shaft.

Abstract: Measuring apparatus and measuring method for detecting ferromagnetic particles which are movably arranged in a liquid volume, characterized by a magnetic means for generating a magnetic field in the liquid volume, a measuring means for the total electrical resistance of the liquid volume with the ferromagnetic particles therein and a means for checking the function of the measuring apparatus with at least one low-value resistor of between 50 and 500? for carrying out a resistance measurement. The invention also describes a magnetic means with an electromagnet which, when in need of cleaning, can be demagnetized by means of correct energization (measured using the normal resistance measurement) and can be magnetized again when started up again.

Abstract: A slide bearing device, includes an inner ring-shaped internal element, an intermediate element that encloses the internal element in the radial direction of the slide bearing device and is at least approximately ring-shaped, and a ring-shaped external element that encloses the intermediate element in the radial direction. The internal element is rotatable relative to the external element, and the intermediate element is rotatable relative to the internal element and relative to the external element. In a default state of the slide bearing device, the internal element is arranged at a distance to the intermediate element in the radial direction of the slide bearing device, and the intermediate element is arranged at a distance to the external element. The internal element and the external element are made of a metallic material and the intermediate element with a non-metallic material.

Abstract: A slide bearing device, includes an inner ring-shaped internal element, an intermediate element encloses the internal element in the radial direction of the slide bearing device and is at least approximately ring-shaped, and a ring-shaped external element that encloses the intermediate element in the radial direction. The internal element is rotatable relative to the external element, and the intermediate element rotatable relative to the internal element and relative to the external element. In a default state of the slide bearing device, the internal element is arranged at a distance to the intermediate element in the radial direction of the slide bearing device, and the intermediate element is arranged at a distance to the external element. The internal element and the external element are made of a metallic material and the intermediate element with a non-metallic material.

Abstract: Measuring apparatus and measuring method for detecting ferromagnetic particles which are movably arranged in a liquid volume, characterized by a magnetic means for generating a magnetic field in the liquid volume, a measuring means for the total electrical resistance of the liquid volume with the ferromagnetic particles therein and a means for checking the function of the measuring apparatus with at least one low-value resistor of between 50 and 500? for carrying out a resistance measurement. The invention also describes a magnetic means with an electromagnet which, when in need of cleaning, can be demagnetized by means of correct energization (measured using the normal resistance measurement) and can be magnetized again when started up again.

Abstract: A method and a device for adapting a bearing clearance in a ceramic-hybrid bearing having rolling elements in the form of balls or rollers made from a ceramic material and an outer and an inner bearing shell made from ferromagnetic material. In order to be in a position to adapt the bearing clearance also during operation, a magnetic flux is introduced into an outer side of the stationary, non-rotating bearing shell and exits again at the opposite outer side of the bearing shell, with a magnetic field and an associated magnetic flux being generated, and that a deformation of the bearing shell in the sense of a decrease or increase in the circumference of the bearing shell is brought about due to the resulting magnetostrictive effect from a change in the magnetic flux.

Abstract: A method and an apparatus detects defects in raceways of bearing shells and rolling elements of ceramic hybrid bearings. To enable the detection of such defects without falsifying measuring values of the ceramic hybrid bearings installed, the outer or inner ferromagnetic bearing shell of the ceramic hybrid bearing is magnetically coded in at least a partial area and the magnetic coding of the bearing shell is used as generator for testing the raceways of the bearing shells and the ceramic rolling elements by inverse magnetostriction.

Abstract: On a fuel supply system for a gas-turbine engine with a high-pressure supply line and a fuel metering unit, the fuel distribution system connected to staged or non-staged burners includes only one single fuel line (3) and the valve arrangements (7) connected to this fuel line and directly associated to individual burners (4), with the valve arrangements (7) each having several cutoff valves (8 to 10), which are—independently of each other—individually or simultaneously electrically settable to a closed or open limit position, with the cutoff valves each featuring a specific, yet different cross-sectional area. The simply designed, low-wear and low-maintenance fuel supply and distribution system, avoids coking in the one fuel line in the hot engine section, and enables a binary-coded fuel supply to the respective burner. With a sufficient number of valves in each arrangement, the fuel metering unit can be omitted.

Abstract: A method and a device for adapting a bearing clearance in a ceramic-hybrid bearing having rolling elements in the form of balls or rollers made from a ceramic material and an outer and an inner bearing shell made from ferromagnetic material. In order to be in a position to adapt the bearing clearance also during operation, a magnetic flux is introduced into an outer side of the stationary, non-rotating bearing shell and exits again at the opposite outer side of the bearing shell, with a magnetic field and an associated magnetic flux being generated, and that a deformation of the bearing shell in the sense of a decrease or increase in the circumference of the bearing shell is brought about due to the resulting magnetostrictive effect from a change in the magnetic flux.

Abstract: This invention relates to a method and an apparatus for the detection of defects in the raceways of bearing shells and the rolling elements of ceramic hybrid bearings. In order to enable the detection of such defects without falsifying the measuring values of the ceramic hybrid bearings installed, the present invention provides that the outer or inner ferromagnetic bearing shell (outer ring 11 or inner ring 12, respectively) of the ceramic hybrid bearing (10) is magnetically coded in at least a partial area (14) and that the magnetic coding of the bearing shell (outer ring 11 or inner ring 12, respectively) is used as generator for testing the raceways of the bearing shells (outer ring 11 or inner ring 12, respectively) and the ceramic rolling elements (ceramic balls 13) by means of inverse magnetostriction.

Abstract: In order to provide a high electric power for an aircraft via a generator driven by the engine, an additional free turbine is included in the hot-gas flow of the engine, which—equipped with generator-starter magnets (9) and surrounded by annularly arranged generator-starter coils (12)—forms a generator-starter turbine (5) and is connected to the high-pressure shaft (1) via an overrunning clutch (15), and hence, is also used for starting the engine.

Abstract: On a fuel supply system for a gas-turbine engine with a high-pressure supply line and a fuel metering unit, the fuel distribution system connected to staged or non-staged burners includes only one single fuel line (3) and the valve arrangements (7) connected to this fuel line and directly associated to individual burners (4), with the valve arrangements (7) each having several cutoff valves (8 to 10), which are—independently of each other—individually or simultaneously electrically settable to a closed or open limit position, with the cutoff valves each featuring a specific, yet different cross-sectional area. The simply designed, low-wear and low-maintenance fuel supply and distribution system, avoids coking in the one fuel line in the hot engine section, and enables a binary-coded fuel supply to the respective burner. With a sufficient number of valves in each arrangement, the fuel metering unit can be omitted.

Abstract: With a generator-starter arrangement for a gas-turbine engine to supply the aircraft with electric power and to start the engine, the rotor (18) of the generator or starter, respectively, is formed by one of the rotors (4) of the high-pressure compressor (1) of the engine, which is provided with magnets (12) on individual blade tips, with the high-pressure compressor being surrounded in this area by a stator (17) of the generator or the starter, respectively. Such a generator-starter arrangement enables a high power requirement of the aircraft to be met, without causing stability or weight problems on the engine. In addition, the arrangement is easily accessible for maintenance and repair.

Abstract: In order to provide a high electric power for an aircraft via a generator driven by the engine, an additional free turbine is included in the hot-gas flow of the engine, which—equipped with generator-starter magnets (9) and surrounded by annularly arranged generator-starter coils (12)—forms a generator-starter turbine (5) and is connected to the high-pressure shaft (1) via an overrunning clutch (15), and hence, is also used for starting the engine.