EP2816199B1 - Commande d'instabilités de faible débit volumétrique dans des turbines à vapeur - Google Patents
Commande d'instabilités de faible débit volumétrique dans des turbines à vapeur Download PDFInfo
- Publication number
- EP2816199B1 EP2816199B1 EP14170721.6A EP14170721A EP2816199B1 EP 2816199 B1 EP2816199 B1 EP 2816199B1 EP 14170721 A EP14170721 A EP 14170721A EP 2816199 B1 EP2816199 B1 EP 2816199B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- passages
- configuration
- flow
- rotor blades
- vane carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/10—Anti- vibration means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/10—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using sealing fluid, e.g. steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/04—Antivibration arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/04—Antivibration arrangements
- F01D25/06—Antivibration arrangements for preventing blade vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/16—Form or construction for counteracting blade vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
Definitions
- the present invention relates to a configuration of the last stage in a steam turbine for controlling rotating flow instabilities in the last stage rotor blades when the steam turbine operates at low volumetric flow conditions, particularly during starting and low load conditions.
- Stalling is a known phenomenon based on the sudden decrease of the load exerted onto a profile subjected to a flow: in steam turbines, the stalling phenomenon induces rotating flow instabilities in the rotor blades, particularly in the last stage rotor blades.
- the flow structure In steam turbines, during starting and low load conditions (up to around 10% of the design mass flow), the flow structure is very disorderly, particularly in the low pressure stage of the steam turbine: this flow is centrifuged radially outwards in the rotor blades, the flow being centrifuged radially inwards in the stator blades.
- this flow is centrifuged radially outwards in the rotor blades, the flow being centrifuged radially inwards in the stator blades.
- At low load conditions there is high flow incidence onto the last stage rotor blades, which can cause flow separation from the rotor blades surface and flow instabilities, these instabilities are commonly found to rotate at about one half of the blade rotational speed.
- the flow field also contains large toroidal vortex structures are set up. These rotating instabilities can couple with the natural frequency of the rotor blades and produce undesirable vibration effects.
- a solution to windage at low load conditions includes a plurality of nozzle stages located between the bucket stages, a circumferentially extending groove, with the groove located upstream of one of the bucket stages and between that bucket stage and an adjacent nozzle stage, a circumferentially extending extraction chamber, and at least one first bore extending from the groove to the extraction chamber.
- the diaphragm assembly also includes at least one second bore extending from the extraction chamber through an outer surface of the diaphragm assembly. This permits cold steam to be delivered into the tip recirculation zone of the last stage blade to reduce windage heating conditions during startup.
- JPH04308301 A discloses another prior art steam turbine configuration.
- the invention is oriented towards solving these problems.
- the invention as herein claimed relates to a configuration for controlling flow instabilities of a last stage of a steam turbine, as set forth in claim 1. Further embodiments of the invention as herein claimed are set forth in the dependent claims.
- the passages are shaped circumferentially in order to increase the circumferential coverage of each passage.
- the fluid blown through the passages into the rotor blades is such that the swirl injection angle incident on the rotor blades forms an angle from zero to -90 degrees.
- the positive angle being taken in the direction of the turbine rotor rotation, with zero degrees being axial, wherein in the axial/radial plane the jet is directed downwards from the outer flow boundary.
- the present invention relates to a configuration 10 for controlling flow instabilities in the last stage rotor blades 2 of a steam turbine when the turbine operates at low volumetric conditions, particularly during starting and low load conditions.
- the configuration 10 is such that a plurality of passages 20 are located in the vane carrier 1 of the last stage of the steam turbine, these passages 20 being located at specific positions at the circumference of the vane carrier 1. Through these passages 20, a fluid is blown onto the rotor blades 2.
- the number of passages 20 and their specific positions are defined in such a way that the fluid blown through the passages 20 is directed towards the rotor blades 2 avoiding rotating stability problems in these last stage rotor blades 2 that produce undesired vibration effects on them.
- Figure 1 shows the flow pattern in the last stage low pressure vane carrier 1 during starting and low load conditions (up to around 10% of the design mass flow), showing that the flow structure is very disorderly.
- the through flow in the vane carrier 1 adopts a wavy shape, as shown in Figure 1 , existing large toroidal vortex structures 30: the last stage low pressure vane carrier 1 actually acts as a radial pump and there is net energy input to the stage.
- a solution is to use water sprays injected in the exhaust diffuser to cool the exhaust casing vane carrier walls and last stage blades, but this solution has not been found to be reliable.
- the purpose of the configuration 10 of the invention is to design the passages 20 to eliminate the rotating flow instabilities in the last stage rotor blades 2 during starting and low load conditions of the steam turbine.
- the positions of the passages 20 upstream of the last stage rotor blade 2 is such that the injection flow is directed through the last stage vane carrier 1 to approximately 80% last stage blade height, as measured from the blade platform to the tip, so as to blow into the torodial vortex 30 typically formed upstream of the rotor blade 2 tip region.
- Figs. 4a , 4b and 4c shows a series of tests that demonstrate the surprising effect that a negative injection angle results in a more stable and steady separated flow, decoupled from resonance can be seen.
- the tests were carried out in a one third scale model low pressure steam turbine over a range of mass flow rates and condenser pressure. During the tests measurement were made of last stage blade stress using a strain gauge located on the surface of the last stage blade. Results of these measurements are shown as lines representation vibrational amplitude in Figs. 4a , 4b and 4c .
- An additional dynamic pressure sensor acting as a microphone, was additional located in the flow to detect the formation of the rotating events that can give rise to blade vibration. From the pressure signal it was possible to determine frequency, which is transformable into fractional speed, and represent this as spheres in Figs 4a , 4b and 4c . The amplitude from the pressure sensor was then used in Figs. 4a , 4b and 4c to define the size of the grey spheres on each of the graphs.
- the fluid injected from the passages 20, which preferably is steam, is such that the injection angle incident on the rotor blades 2 forms an angle from zero to -90 degrees, the negative angle being taken in the direction counter to the turbine rotor rotation.
- the preferred injection angle range is -45 to -75 degrees, the most preferred injection angle being -60 degrees.
- the flow injected from the passages 20 is up to 10% of the mainstream flow.
- the number of passages 20 relative to the number of rotor blades 2 is set to provide sufficient stabilization of the rotating events. In the case of the test results given, 12 passages were used. Other embodiments of this invention may use a different number of passages to obtain sufficient stabilization.
- the passages are equally spaced around the circumference. In an alternative embodiment the passages are unevenly spaced around the circumference for enhanced performance or for practical considerations.
- the following parameters influence the performance of the configuration 10 of the invention maintaining the trajectory length of the fluid blown from the passages 20 as small as possible; maintaining the velocity of the fluid injected as high as possible; and maximizing the circumferential extent of the passages 20 in the vane carrier 1.
- the passages 20 are circumferentially shaped to increase the circumferential coverage in the vane carrier 1 as shown in Fig. 2 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Claims (11)
- Configuration (10) pour réguler des instabilités de flux d'un dernier étage d'une turbine à vapeur où des pales de rotor (2) tournent encerclées par un support d'aube (1), dans laquelle une pluralité de passages (20) sont situés dans le support d'aube (1), de telle sorte qu'un fluide est soufflé à travers ces passages (20) en amont des pales de rotor (2) et agencés pour former un flux qui arrive sur les pales de rotor (2), caractérisé en ce que ce flux arrive sur les pales de rotor avec un angle d'injection négatif entre zéro et -90 degrés dans une direction contraire à la rotation des pales de rotor (2), zéro degré étant axial, caractérisé par les passages (20) configurés et agencés pour souffler un fluide en direction d'un point qui est à 80 % d'une hauteur de la pale de rotor de dernier étage (2) pris à partir d'une base jusqu'à une extrémité de la pale de rotor (2).
- Configuration (10) selon la revendication 1, dans laquelle la pluralité de passages (20) sont espacés de façon circonférentiellement uniforme dans le support d'aube (1).
- Configuration (10) selon la revendication 2, dans laquelle le nombre de passages (20) espacés de façon circonférentiellement uniforme dans le support d'aube (1) est de huit.
- Configuration (10) selon la revendication 2, dans laquelle le nombre de passages (20) espacés de façon circonférentiellement uniforme dans le support d'aube (1) est de douze.
- Configuration (10) selon la revendication 1, dans laquelle les passages (20) sont circonférentiellement profilés.
- Configuration (10) selon la revendication 1, dans laquelle l'angle d'injection est dans une plage de -45 à -75 degrés.
- Configuration (10) selon la revendication 1, dans laquelle l'angle d'injection est d'environ -60 degrés.
- Configuration (10) selon la revendication 1 dans laquelle le flux injecté à travers les passages (20) va jusqu'à 10 % du flux de courant principal circulant à travers les pales de rotor (2) et le support d'aube (1).
- Configuration (10) selon la revendication 1, dans laquelle le fluide soufflé à travers les passages (20) est de la vapeur.
- Configuration (10) selon une quelconque revendication précédente, dans laquelle dans un plan axial/radial, le flux est dirigé vers le bas à partir d'une limite de flux externe.
- Turbine à vapeur comprenant une configuration de dernier étage (10) selon l'une quelconque des revendications 1 à 10.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14170721.6A EP2816199B1 (fr) | 2013-06-17 | 2014-06-02 | Commande d'instabilités de faible débit volumétrique dans des turbines à vapeur |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13172223 | 2013-06-17 | ||
EP14170721.6A EP2816199B1 (fr) | 2013-06-17 | 2014-06-02 | Commande d'instabilités de faible débit volumétrique dans des turbines à vapeur |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2816199A2 EP2816199A2 (fr) | 2014-12-24 |
EP2816199A3 EP2816199A3 (fr) | 2015-03-04 |
EP2816199B1 true EP2816199B1 (fr) | 2021-09-01 |
Family
ID=48669768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14170721.6A Active EP2816199B1 (fr) | 2013-06-17 | 2014-06-02 | Commande d'instabilités de faible débit volumétrique dans des turbines à vapeur |
Country Status (5)
Country | Link |
---|---|
US (1) | US20140369815A1 (fr) |
EP (1) | EP2816199B1 (fr) |
JP (1) | JP6239447B2 (fr) |
CN (1) | CN104234757B (fr) |
IN (1) | IN2014DE01617A (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016094409A1 (fr) * | 2014-12-09 | 2016-06-16 | Villarreal Anna | Procédés et dispositifs de surveillance de la santé féminine |
US10662802B2 (en) | 2018-01-02 | 2020-05-26 | General Electric Company | Controlled flow guides for turbines |
JP6916755B2 (ja) * | 2018-03-09 | 2021-08-11 | 三菱重工業株式会社 | 回転機械 |
WO2019236062A1 (fr) | 2018-06-05 | 2019-12-12 | Siemens Energy, Inc. | Agencement d'un dernier étage avec des bloqueurs de flux et procédé correspondant pour supprimer des cellules d'instabilité de flux rotatives |
EP3816397B1 (fr) * | 2019-10-31 | 2023-05-10 | General Electric Company | Aubes de turbines avec écoulement contrôlé |
CN112699505B (zh) * | 2020-12-28 | 2022-11-25 | 哈尔滨汽轮机厂有限责任公司 | 一种用于核电机组低压缸长叶片的动应力有限元计算方法 |
CN113153453B (zh) * | 2021-03-02 | 2022-10-11 | 哈尔滨工业大学 | 汽轮机末级叶片容积流量估计方法、颤振预警方法及系统和装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04308301A (ja) * | 1991-04-03 | 1992-10-30 | Mitsubishi Heavy Ind Ltd | 蒸気タービン翼の振動防止方法 |
US20130017066A1 (en) * | 2011-07-14 | 2013-01-17 | Honeywell International Inc. | Compressors with integrated secondary air flow systems |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57180101U (fr) * | 1981-05-12 | 1982-11-15 | ||
JPS5813105A (ja) * | 1981-07-16 | 1983-01-25 | Toshiba Corp | 蒸気タ−ビン |
JPS63179101A (ja) * | 1987-01-20 | 1988-07-23 | Mitsubishi Heavy Ind Ltd | 軸流タ−ビン |
JPH0430203A (ja) * | 1990-05-25 | 1992-02-03 | Fanuc Ltd | ロボットの加減速時定数制御方法 |
JPH0430203U (fr) * | 1990-07-09 | 1992-03-11 | ||
US5486091A (en) * | 1994-04-19 | 1996-01-23 | United Technologies Corporation | Gas turbine airfoil clocking |
JP3816150B2 (ja) * | 1995-07-18 | 2006-08-30 | 株式会社荏原製作所 | 遠心流体機械 |
JP3786458B2 (ja) * | 1996-01-19 | 2006-06-14 | 株式会社東芝 | 軸流タービン翼 |
CH697101A5 (de) * | 2004-01-31 | 2008-04-30 | Zhengji Zhang | Verfahren zur Unterdrückung der Strömungsinstabilität und rotierender Ablösung in Strömungsmaschinen. |
US7594388B2 (en) * | 2005-06-06 | 2009-09-29 | General Electric Company | Counterrotating turbofan engine |
JP2005299680A (ja) * | 2005-07-11 | 2005-10-27 | Toshiba Corp | 軸流タービン翼 |
US7744343B2 (en) * | 2006-09-21 | 2010-06-29 | General Electric Company | Method and apparatus for controlling the operation of a steam turbine |
US8322972B2 (en) * | 2009-11-05 | 2012-12-04 | General Electric Company | Steampath flow separation reduction system |
EP2434164A1 (fr) * | 2010-09-24 | 2012-03-28 | Siemens Aktiengesellschaft | Traitement de carter variable |
US20130064665A1 (en) * | 2011-09-13 | 2013-03-14 | General Electric Company | Low pressure steam turbine including pivotable nozzle |
JP2013060931A (ja) * | 2011-09-15 | 2013-04-04 | Toshiba Corp | 蒸気タービン |
US20130280050A1 (en) * | 2012-04-18 | 2013-10-24 | General Electric Company | Turbine vibration reduction system |
-
2014
- 2014-06-02 EP EP14170721.6A patent/EP2816199B1/fr active Active
- 2014-06-16 IN IN1617DE2014 patent/IN2014DE01617A/en unknown
- 2014-06-16 US US14/305,316 patent/US20140369815A1/en not_active Abandoned
- 2014-06-17 JP JP2014124549A patent/JP6239447B2/ja active Active
- 2014-06-17 CN CN201410269622.4A patent/CN104234757B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04308301A (ja) * | 1991-04-03 | 1992-10-30 | Mitsubishi Heavy Ind Ltd | 蒸気タービン翼の振動防止方法 |
US20130017066A1 (en) * | 2011-07-14 | 2013-01-17 | Honeywell International Inc. | Compressors with integrated secondary air flow systems |
Also Published As
Publication number | Publication date |
---|---|
IN2014DE01617A (fr) | 2015-06-19 |
CN104234757A (zh) | 2014-12-24 |
CN104234757B (zh) | 2016-10-05 |
US20140369815A1 (en) | 2014-12-18 |
EP2816199A3 (fr) | 2015-03-04 |
JP6239447B2 (ja) | 2017-11-29 |
JP2015001228A (ja) | 2015-01-05 |
EP2816199A2 (fr) | 2014-12-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2816199B1 (fr) | Commande d'instabilités de faible débit volumétrique dans des turbines à vapeur | |
RU2264541C2 (ru) | Способ модификации лопатки ротора для паровой турбины, лопатка ротора для паровой турбины и многоступенчатая паровая турбина | |
JP2021050739A (ja) | ディフューザにおける偏向通路およびこうしたディフューザを設計する対応する方法 | |
US10443626B2 (en) | Non uniform vane spacing | |
US9488064B2 (en) | Turbomachine with variable-pitch vortex generator | |
US20150322803A1 (en) | Rotor for a gas turbine engine | |
JP6971564B2 (ja) | ターボ機械およびそのためのタービンノズル | |
US11156089B2 (en) | Steam turbine | |
US9316107B2 (en) | Static vane assembly for an axial flow turbine | |
Yue et al. | Experimental investigation of the unsteady tip clearance flow in a low-speed axial contra-rotating compressor | |
Alone et al. | Performance characterization of the effect of axial positioning of bend skewed casing treatment retrofitted to a transonic axial flow compressor | |
Alone et al. | Experimental investigation on the effect of porosity of bend skewed casing treatment on a single stage transonic axial flow compressor | |
Buffaz et al. | Aerodynamic instabilities in transonic centrifugal compressor | |
Buffaz et al. | Impact of tip clearance size and rotation speed on the surge onset in a high pressure centrifugal compressor | |
JP6804265B2 (ja) | タービンの部分を一体化するためのシステム | |
Xin et al. | Numerical investigation of the flow field and aerodynamic load on impellers in centrifugal compressor with different radial inlets | |
Li et al. | Investigation of the wake effect from the centrifugal splitter impeller blade to the vaned diffuser | |
EP2997230B1 (fr) | Section conique de collet de pied d'aube tangentielle | |
Nishioka et al. | Influence of rotating instability on stall inception patterns in a variable-pitch axial-flow fan | |
Tsukamoto et al. | Effect of curvilinear element blade for open-type centrifugal impeller on stator performance | |
Xu et al. | Experimental Research on Inlet Steady Swirl Distortion in an Axial Compressor with Non-Uniform Tip Clearance | |
US10364703B2 (en) | Annular element of a turbomachine casing | |
Numakura | Performance of a small-size two-stage centrifugal compressor | |
Abdelhamid | Control of self-excited flow oscillations in vaneless diffuser of centrifugal compression systems | |
US20180073381A1 (en) | Method for designing a fluid flow engine and fluid flow engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20140602 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: F01D 19/00 20060101AFI20150129BHEP Ipc: F01D 9/04 20060101ALI20150129BHEP Ipc: F01D 21/00 20060101ALI20150129BHEP Ipc: F01D 5/16 20060101ALI20150129BHEP Ipc: F01D 25/24 20060101ALI20150129BHEP Ipc: F01D 5/10 20060101ALI20150129BHEP Ipc: F01D 25/06 20060101ALI20150129BHEP Ipc: F01D 5/00 20060101ALI20150129BHEP Ipc: F01D 25/04 20060101ALI20150129BHEP Ipc: F01D 11/10 20060101ALI20150129BHEP |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20180504 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20201120 |
|
GRAJ | Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted |
Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
INTC | Intention to grant announced (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH |
|
INTG | Intention to grant announced |
Effective date: 20210420 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 1426459 Country of ref document: AT Kind code of ref document: T Effective date: 20210915 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602014079801 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20210901 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211201 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211201 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1426459 Country of ref document: AT Kind code of ref document: T Effective date: 20210901 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20211202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220101 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20220103 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602014079801 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |
|
26N | No opposition filed |
Effective date: 20220602 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20220630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220602 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220630 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220602 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220630 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230523 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20230523 Year of fee payment: 10 Ref country code: FR Payment date: 20230523 Year of fee payment: 10 Ref country code: DE Payment date: 20230523 Year of fee payment: 10 Ref country code: CZ Payment date: 20230526 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20230523 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20140602 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210901 |