| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | Compressor rotating stall detection and warning system | US565486 | 1983-12-27 | US4581888A | 1986-04-15 | Charles W. Schmitzer; James B. Kelly |
| Nonrecoverable compressor rotating stall in a gas turbine engine is detected virtually at its onset by continuously calculating corrected engine speed and measuring the compressor pressure ratio. Associated with each corrected engine speed is a predetermined, empirically calculated critical pressure ratio. When the actual pressure ratio equals or falls below the critical pressure ratio a nonrecoverable stall has been detected and an output signal is generated which warns the pilot or automatically causes corrective action to be taken. | ||||||
| 62 | Device for eliminating rotating stall in axial-flow compressors | US50121455 | 1955-04-13 | US2858974A | 1958-11-04 | BULLOCK ROBERT O; HUPPERT MERLE C |
| 63 | Method and equipment for detecting rotating stall and compressor | US13686290 | 2012-11-27 | US09279431B2 | 2016-03-08 | David Rossi; Daniele Galeotti |
| A method for detecting rotating stall in a compressor is disclosed herein. The method comprises measuring radial vibration of the rotor relative to the stator and generating a vibration measurement signal, calculating a frequency spectrum of the vibration measurement signal, identifying a plurality of frequency bandwidths of the frequency spectrum, neglecting one first frequency bandwidth of the plurality of frequency bandwidths if the rotation frequency of the rotor falls within the first frequency bandwidth, neglecting at least one second frequency bandwidth of the plurality of frequency bandwidths if the rotation frequency of the rotor falls below the second frequency bandwidth, determining the maximum magnitude of the spectrum in each of the non-neglected frequency bandwidths, and comparing each determined maximum magnitude and a predetermined value. Rotating stall is considered occurring if at least one of the comparisons shows that the corresponding determined maximum magnitude is greater than the predetermined value. | ||||||
| 64 | Rotating stall detection using optical measurement of blade untwist | US13936561 | 2013-07-08 | US08854626B2 | 2014-10-07 | Daniel Kominsky |
| Systems and methods are provided for real-time detection of the onset of stall in turbomachinery, such as compressor stall. The methods are capable of detecting and analyzing time of arrival of the chord of the blade at a sensor array to provide an indication of the onset of compressor stall. Systems for detecting the onset of compressor stall include: light sources; a plurality of linearly arranged optical fibers for transmitting light from the light sources and for receiving transmitted light reflected from a blade; a detector for measuring intensity of the reflected light; and a processor for analyzing the intensity of the reflected light to determine blade twist angle and from the blade twist angle identify onset of compressor stall. The invention can prevent the needless loss of life and assets caused by compressor stall that may lead to unexpected catastrophic failure of an engine. | ||||||
| 65 | Rotating stall prevention system for compressor | US497417 | 1995-06-30 | US5586857A | 1996-12-24 | Hiroshi Ishii; Tetsuo Sasada; Masayuki Kasahara; Yasuhiro Katoh; Yasushige Kashiwabara |
| A compressor has inlet guide vanes, rotor blades and stator blades. To prevent rotating stall, baffle vanes 5 capable of having their angles varied are installed upstream of the inlet guide vanes, actuators to vary the angles of baffle vanes are coupled to the baffle vanes, sensors installed upstream of the baffle vanes detect a rotating stall condition inside the flow passage of the compressor, and a control unit is responsive to signals from the sensors to output control signals to the actuators to vary the angles of the baffle vanes so as to prevent the rotating stall condition. Instead of the baffle vanes, fluid jets may be provided upstream of the inlet guide vanes for the same purposes. | ||||||
| 66 | Sub-idle stability enhancement and rotating stall recovery | US859767 | 1992-03-30 | US5269136A | 1993-12-14 | Syed J. Khalid |
| In an aircraft gas turbine engine having a variable area exhaust, gas turbine compressor operating conditions are sensed to determine a sub-idle condition or a rotating stall. The exhaust area is increased to a maximum when a sub-idle condition is present. If a condition associated with a rotation stall is sensed, fuel flow is decremented but not below a minimum flow. When the rotating stall ends, fuel flow is restored to the normal level and then the engine reaches stabilized operating conditions, the nozzle area is restored at a scheduled rate. | ||||||
| 67 | 偵測壓縮機中旋轉失速的方法 | TW097110027 | 2008-03-21 | TWI386557B | 2013-02-21 | 斯塔柏萊 羅伯特E.; STABLEY, ROBERT E.; 艾查柏格E. 寇帝斯; EICHELBERGER, E. CURTIS |
| 68 | Method and system for detecting precursors to compressor stall and surge | EP03256261.3 | 2003-10-03 | EP1406018B1 | 2013-03-13 | Bonanni, Pierino; Venkateswaran, Narayanan; Bharadwaj, Sanjay |
| 69 | DEVICE FOR BLOCKING SLIDE OR ROTATION WITH OVERLOAD PROTECTION | EP09702237.0 | 2009-01-08 | EP2231972A1 | 2010-09-29 | Glogowski, Jacek |
| Device for blocking the slide or rotation around an axis, for instance of a window sash in relation to the frame, with overload protection, comprising at least a casing, slider and a mechanism pressing the slider to the casing, in which, as a consequence of the application of a required force to the axis (7) of the slider intermeshed with the casing, balanced by slider springs (9), the braking surfaces are moved against each other, an operation resulting in a reduction of the thickness of the slider, which allows to unlock and move it free of damage. | ||||||
| 70 | PROCEDE DE SUPPRESSION DU DECOLLEMENT TOURNANT DANS UNE TURBOMACHINE | EP12711950.1 | 2012-02-28 | EP2681429A1 | 2014-01-08 | DJELASSI, Cédrik |
| The invention relates to a method for eliminating rotating stall in the compressor of a turbomachine, characterized in that said method comprises the following steps: - a step (103) of automatically detecting a surge in the turbomachine; - a step (104) of automatically shutting off the turbomachine; - if a surge has been detected, a step (106) of automatically restoring a surge margin; - a step (105) of automatically restarting the turbomachine. | ||||||
| 71 | DEVICE FOR BLOCKING SLIDE OR ROTATION WITH OVERLOAD PROTECTION | EP09702237.0 | 2009-01-08 | EP2231972B1 | 2013-12-18 | Glogowski, Jacek |
| Device for blocking the slide or rotation around an axis, for instance of a window sash in relation to the frame, with overload protection, comprising at least a casing, slider and a mechanism pressing the slider to the casing, in which, as a consequence of the application of a required force to the axis (7) of the slider intermeshed with the casing, balanced by slider springs (9), the braking surfaces are moved against each other, an operation resulting in a reduction of the thickness of the slider, which allows to unlock and move it free of damage. | ||||||
| 72 | Method and system for detecting precursors to compressor stall and surge | EP03256261.3 | 2003-10-03 | EP1406018A2 | 2004-04-07 | Bonanni, Pierino; Venkateswaran, Narayanan; Bharadwaj, Sanjay |
A method and system for detecting precursors to compressor stall and surge in which at least one compressor parameter is monitored (30,32) to obtain raw data representative of said at least one compressor parameter. The raw data is pre-processed using a frequency demodulator (36) to produce pre-processed data, and the pre-processed raw data is post-processed using a Kalman filter (40) to obtain stall precursors (42). |
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| 73 | System and method for detecting rotating stall in a centrifugal compressor | US10641277 | 2003-08-14 | US06857845B2 | 2005-02-22 | Robert Edward Stabley; Gregory Keith Beaverson; James Edwin Bender |
| A system and method is provided for detecting and controlling rotating stall in the diffuser region of a centrifugal compressor. The process begins with the detection or sensing of acoustic energy associated with the onset of rotating stall. A pressure transducer is placed in the gas flow path downstream of the impeller, preferably in the compressor discharge passage or the diffuser, to measure the sound or acoustic pressure phenomenon. Next, the signal from the pressure transducer is processed either using analog or digital techniques to determine the presence of rotating stall. Rotating stall is detected by comparing the detected energy amount, which detected energy amount is based on the measured acoustic pressure, with a predetermined threshold amount corresponding to the presence of rotating stall. Finally, an appropriate corrective action is taken to change the operation of the centrifugal compressor in response to the detection of rotating stall. | ||||||
| 74 | System and method for detecting rotating stall in a centrifugal compressor | US10641277 | 2003-08-14 | US20040037693A1 | 2004-02-26 | Robert Edward Stabley; Gregory Keith Beaverson; James Edwin Bender |
| A system and method is provided for detecting and controlling rotating stall in the diffuser region of a centrifugal compressor. The process begins with the detection or sensing of acoustic energy associated with the onset of rotating stall. A pressure transducer is placed in the gas flow path downstream of the impeller, preferably in the compressor discharge passage or the diffuser, to measure the sound or acoustic pressure phenomenon. Next, the signal from the pressure transducer is processed either using analog or digital techniques to determine the presence of rotating stall. Rotating stall is detected by comparing the detected energy amount, which detected energy amount is based on the measured acoustic pressure, with a predetermined threshold amount corresponding to the presence of rotating stall. Finally, an appropriate corrective action is taken to change the operation of the centrifugal compressor in response to the detection of rotating stall. | ||||||
| 75 | Process for Preventing Rotating Stall and Surge in a Turbomachine | US14515639 | 2014-10-16 | US20150176499A1 | 2015-06-25 | Laurent Balcer |
| The present application provides a process for preventing rotating stall and surge in a turbomachine compressor. The compressor may include air extraction pipes connecting the compressor to a turbomachine exhaust area or to the atmosphere, at least one of the pipes is fitted with a flow regulation valve, and each valve has an adjustable degree of opening. The process includes, for at least one of the valves, a complete opening command when the compressor rotation speed is less than a predetermined threshold value beyond which there is no longer any risk of rotating stall and surge and a command for lowering the degree of opening of the valve when the rotation speed of the compressor exceeds the threshold value. | ||||||
| 76 | VERFAHREN ZUM ERKENNEN EINES STÖRFALLES "ROTATING STALL" BEI EINEM UMRICHTERGESPEISTEN VERDICHTER | PCT/EP2008/059853 | 2008-07-28 | WO2009016145A1 | 2009-02-05 | MERTENS, Axel; NEESER, Gerhard |
Die Erfindung bezieht sich auf ein Verfahren zum Erkennen eines Störfalls "Rotating Stall" bei einem Verdichter (12), der mittels eines umrichtergespeisten Drehstrommotors (8) angetrieben wird. Erfindungsgemäß wird ein aus gemessenen Stromrichter-Ausgangsströmen (iS1, iS2, iS3) und einem gemessenen drehzahlproportionalen Signals (ω) berechneter Momenten-Schätzwert (^m ) mit einem aus einem gemessenen und einem vorbestimmten drehzahlproportionalen Signal (ω, ω*) bestimmten Momenten-Sollwert (m*) derart verglichen, dass bei Ungleichheit ein Signal (SRS) generiert wird, das anzeigt, dass der Störfall "Rotating Stall" eingetreten ist. Somit kann bei einem Verdichter (12), der mit einem umrichtergespeisten Drehstrommotor (8) angetrieben wird, der Störfall "Rotating Stall" ohne Drucksensoren und/oder Schwingungsaufnehmer ermittelt werden. |
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| 77 | A TECHNIQUE FOR CONTROLLING ROTATING STALL IN COMPRESSOR FOR A GAS TURBINE ENGINE | PCT/EP2017/073669 | 2017-09-19 | WO2018054916A1 | 2018-03-29 | KRISHNABABU, Senthil |
A technique for controlling a rotating stall in a compressor of a gas turbine engine is presented. In the technique a flow injection is introduced into an axial air flow path of the compressor via a flow-injection opening located at a pressure side of a guide vane in the compressor and directed towards a leading edge of a compressor rotor blade located adjacently downstream of the guide vane. The flow injection is introduced when the rotating stall is detected and/or when the compressor is being operated at a speed lower than full load speed. The flow injection reduces an angle of incidence of compressor air on the leading edge of the downstream rotor blade and hence the rotor sees a more favorable velocity. The favorable velocity results into an increase in the operating range of the rotor and hence of the compressor by mitigating and/or reducing the rotating stalls. |
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| 78 | A TECHNIQUE FOR CONTROLLING ROTATING STALL IN COMPRESSOR FOR A GAS TURBINE ENGINE | EP16189719.4 | 2016-09-20 | EP3296573A1 | 2018-03-21 | Krishnababu, Senthil |
A technique for controlling a rotating stall in a compressor of a gas turbine engine is presented. In the technique a flow injection is introduced into an axial air flow path of the compressor via a flow-injection opening located at a pressure side of a guide vane in the compressor and directed towards a leading edge of a compressor rotor blade located adjacently downstream of the guide vane. The flow injection is introduced when the rotating stall is detected and/or when the compressor is being operated at a speed lower than full load speed. The flow injection reduces an angle of incidence of compressor air on the leading edge of the downstream rotor blade and hence the rotor sees a more favorable velocity. The favorable velocity results into an increase in the operating range of the rotor and hence of the compressor by mitigating and/or reducing the rotating stalls.
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| 79 | ANTI-ROTATIONAL LINK FOR VEHICLE POWER SEAT ADJUSTER | EP96943537.0 | 1996-11-27 | EP0863820A1 | 1998-09-16 | PAWLOWICZ, Brian, D.; MONTANO, Joseph, C. |
| A power seat adjuster includes a drive link (84) fixed to a torsion tube (42) rotatably supported between the upper tracks of a pair of track assemblies. One end (88) of the drive link (84) is pivotally connected to a first leg (82) depending from an upper seat support frame member (80). First (94) and second flanges (96) respectively formed on the first end (88) of the drive link (84) and the first leg (82) lie in an intersecting path for engagement upon rotation of the first end (88) of the drive link (84) beyond a normal end travel position to resist continued rotation of the first end (88) of the drive link (84) and the upper seat support frame (80). Similar cooperating flanges are formed on a slave drive link (102) and on the lost motion strut (156) of a rear elevating mechanism. | ||||||
| 80 | Method and apparatus for protecting centrifugal compressors from rotating stall vibrations | US112516 | 1998-07-09 | US6036432A | 2000-03-14 | Vishnu M. Sishtla; Joost J. Brasz |
| A fluid passage extends through the compressor casing from a point near the tip of the impeller to a transducer located externally of the compressor casing. Responsive to fluctuations of pressure sensed by the transducer indicative of rotating stall, the compressor is controlled by varying the diffuser or shutting down the compressor, as is appropriate. | ||||||
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