EP2788586A1 - Couronne d'aubes d'une turbomachine axiale et procédé permettant d'ajuster la capacité de débit de la couronne d'aubes - Google Patents

Couronne d'aubes d'une turbomachine axiale et procédé permettant d'ajuster la capacité de débit de la couronne d'aubes

Info

Publication number
EP2788586A1
EP2788586A1 EP12786929.5A EP12786929A EP2788586A1 EP 2788586 A1 EP2788586 A1 EP 2788586A1 EP 12786929 A EP12786929 A EP 12786929A EP 2788586 A1 EP2788586 A1 EP 2788586A1
Authority
EP
European Patent Office
Prior art keywords
ring
blade ring
blade
justierschaufel
axial turbomachine
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.)
Granted
Application number
EP12786929.5A
Other languages
German (de)
English (en)
Other versions
EP2788586B1 (fr
Inventor
Armin De Lazzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP12786929.5A priority Critical patent/EP2788586B1/fr
Publication of EP2788586A1 publication Critical patent/EP2788586A1/fr
Application granted granted Critical
Publication of EP2788586B1 publication Critical patent/EP2788586B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • 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
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/167—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes of vanes moving in translation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/30—Application in turbines
    • F05B2220/301—Application in turbines in steam turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines

Definitions

  • Blade ring for an axial turbomachine and method for adjusting the buoyancy of the blade ring
  • the invention relates to a blade ring for an axial turbomachine, an axial turbomachine with the blade ring and a method for adjusting the absorption capacity of the blade ring.
  • the vane rings of Dampftur- bine have a plurality of guide vanes which are arranged evenly distributed over the circumference, wherein Zvi ⁇ rule formed the vanes vane channels.
  • the blade channels are limited on the hub side of a hub contour and the housing side of a housing contour.
  • the absorption capacity of the steam turbine is influenced significantly by the absorption ⁇ ability of the first vane ring, which is substantially determined by the totality of all the effective cross sections of the blade channels of the first Leitschau ⁇ felkranzes.
  • the invention has for its object to provide a blade ring for an axial turbomachine, the axial turbomachine with the blade ring and a method for adjusting the ability to swallow the blade ring, the above ge ⁇ called problems are overcome and in particular the
  • the blade ring according to the invention for an axial turbo ⁇ machine has arranged on an outer ring, radially inwardly facing outer surface and arranged on an inner ring, radially outwardly facing inner surface, which define an annular and tapered in the main flow direction of the axial turbomachine flow channel and concentric and parallel arranged to one another, and at least one Justierschaufel, which is arranged in the flow channel by means of a guide device to a surface line of one of the surfaces displaceable parallel and lockable on at least one of the rings in a predetermined position.
  • a generatrix is characterized in that it is arranged on one of the two surfaces and is directed to the imaginary tip of the respective surface.
  • the diameter of the flow channel decreases in the direction of the taper of the inner surface and the outer surface.
  • the ability to swallow can be increased by the at least one adjusting blade being displaced counter to the direction of tapering with the aid of the guide device.
  • the ability to swallow of the blade ⁇ ring is advantageously changed easily under the operation of the guide device. This may be necessary, for example, when the buoyancy of the blade ring changes due to aging of components of the axial turbomachine or when the swallowing capacity is changing
  • Framework conditions such as a modified process steam mass flow to be adjusted. Furthermore, a correction of the ability to swallow to compensate for manufacturing tolerances or assembly tolerances of a newly manufactured axial turbomachine can be performed. It is conceivable that the inner ring is formed as a disc.
  • the outer surface and the inner surface are preferably Kegelflä ⁇ chen.
  • the outer surface and the inner surface alternatively have along the respective surface line in each cross section perpendicular to the axis of the flow channel segmentally equal radii of curvature, so that remain constant when moving the Justierschaufel the extensions of the radial gaps between the Justierschaufel and the surfaces.
  • each of the cross sections of the outer surface and the inner surface is preferably formed perpendicular to the axis of the flow channel in each case by a polygon or by a plurality of immediately adjacent arranged circle segments.
  • the blade ring is preferably a diagonal stage of the axial ⁇ turbomachine.
  • the diagonal stage advantageously comprises the Strö ⁇ flow duct which is bounded by the two conical surfaces.
  • the blade ring is a vane ring with fixed, non-rotating vanes and a fixed, non-rotating inner surface and
  • the blade ring has a plurality of blades, wherein the blades are alternately the Justingschaufeln and fixedly attached to the outer surface and / or on the inner surface blades.
  • Each of the fixedly mounted blades is preferably made in one piece with the inner ring and the outer ring, or integrally with a segment of the inner ring and a segment of the outer ring. This advantageously results in a high rigidity of the blade ring. Characterized in that each second blade is fixedly mounted, resulting in the production-of the blade ring advantageously a good accessible ⁇ ness of the blade ring for a production tool.
  • the guide device alau stretti a slide groove in the inner ring and / or in the outer ring as well as by the radius and / or has on the radial inner side of the alignment ⁇ shovel a pin, the pin in the
  • the guide means preferably comprises at least one of the slide grooves downstream of the flow direction of the axial flow turbomachine Hauptströ ⁇ a stop on which the Justierschaufel be fixed in the predetermined position.
  • the Justierschaufel is pressed in the operation of the axial turbomachine by the flowing in the flow channel ⁇ ing fluid against the stop, whereby the Fest ⁇ position of Justierschaufel is accomplished.
  • the posi- tion of the Justierschaufel in the flow channel can ⁇ example, by introducing a spacer to define the stop.
  • the spacer can for example be fixedly mounted by grub screws and / or by welding points on the outer ring and / or on the inner ring.
  • the guide means is arranged such that the at least one adjusting blade is exchangeable with another adjusting blade.
  • the mini- At least one adjusting blade to be replaced with the other adjusting blade with other aerodynamic properties can also be carried out by a suitable exchange, for example by the other adjusting blade having a profile with a shorter or longer chord length.
  • the axial turbomachine according to the invention has the blade ring according to the invention.
  • the ability to swallow of the axial turbomachine is preferably due to the ability to absorb moisture
  • the inventive method for adjusting the ability to swallow of the blade ring has the following steps: Predetermining a desired value of the swallowing ability of
  • Blade ring Determining the actual value of the buoyancy of the blade ring; Comparing the target value of the swallowing ⁇ ability of the blade ring with the actual value of the swallowing ⁇ ability of the blade ring; Moving the at least one adjusting blade by means of the guide device paral ⁇ lel to the surface line such that the desired value of the
  • the figure shows a longitudinal section through an axial flow turbomachine having a before ⁇ ferred embodiment of the blade ring according to the invention.
  • an axial turbo ⁇ machine 1 a housing 22, a shaft 21 and a plurality of blade rings 11 to 13.
  • a fluid 25 is flowable within the housing 22 with a main flow direction 17.
  • a first vane ring 11, a blade ring 12 and a second vane ring 13 are shown, which are arranged in this order in the main flow direction 17 of the fluid 25.
  • the first vane ring 11 has an outer cone ring 24 fastened to the housing 22 with a conical outer surface 2 facing radially inward, and inside the outer conical ring 24 an inner cone ring 23 with a conical inner surface 3 facing radially outward.
  • the conical outer surface 2 and the inner conical surface 3 are concentric angeord ⁇ net, have a same cone angle 18, are arranged parallel to each other in each axial section and define an annular flow channel 4.
  • the inner cone ring 23 and the Outside taper ring 24 truncated cones.
  • the inner cone ring 23 includes its conical tip.
  • the cone axes 26 of the cone outer surface 2 and the inner surface of the cone 3 coincide with the shaft axis 27.
  • the cone ⁇ surfaces 2, 3 are (shown in the figure is half the outer diameter 28) oriented such that the outer diameter 28 of the flow channel 4 in the main flow direction 17 decreases.
  • the inner cone ring 23 and the outer cone ring 24 are modified such that the cone inner surface 3 and the cone outer surface 2 along the respective surface line 6 and along the width of Justierschaufel 7 in each cross-section perpendicular to the shaft 21 have the same curvature radii, so that when moving the Justierschaufel 7 the
  • a Justierschaufel 7 is arranged, which is arranged with its radially outer side 9 on the conical outer surface 2 and with its radially inner side 10 on the cone ⁇ inner surface 3.
  • the Justierschaufel 7 has on its inner radial side 9 and its radial outer side 10 depending Weil ⁇ a pin 15, wherein the pins 15 each engage in a sliding groove 14 in the inner cone ring 23 and the outer taper ring 24.
  • the slide grooves 14 are arranged parallel to each other and each extend along a surface line 6 of the conical surfaces 2, 3, so that the Justierschaufel 7 is parallel to the generatrices 6 slidably.
  • the adjusting blade 7 When the adjusting blade 7 is displaced in the main flow direction 17, the distance in the circumferential direction of the adjusting blade 7 is reduced to the blades arranged adjacent to it in the first guide blade ring 11, whereby the obstruction for the fluid 25 in the first guide blade ring 11 increases. Due to the increasing obstruction, the capacity of the first vane ring 11 is reduced. Conversely, the
  • Sucking capability can be increased by the adjusting blade 7 is moved upstream of the main flow direction 17.
  • the maximum possible displacement 8 of the adjusting blade 7 is limited by the length of the flow channel 4 in the main flow ⁇ direction 17 and the length of the Gleitnuten 14.
  • the adjusting blade 7 is replaced by another adjusting blade which has a shorter or longer chord length.
  • the sliding groove 14 in the tapered inner surface 3 is limited in the main flow direction 17 by a stop 29, i. it is not guided to the downstream end 5 of the flow channel 4, so that during operation of the axial turbomachine 1, the Justierschaufel 7 is pressed by the flow of the fluid 25 to the stop 29. It is also possible to limit the sliding groove 14 in the conical outer surface 2 in the main flow direction 17 of a stop or to limit both Gleitnuten 14 of a stop. Upstream in the main flow direction 17, the sliding grooves 14 are not limited, so that the adjusting blade 7 can be removed from the flow channel 4 and exchanged for another adjusting blade.
  • Ab- pieces 16 are provided for detecting the position of the Justierschaufel 7 in the slide grooves 14 .
  • the spacers 16 are arranged both on the downstream side of the pins 15, as well as on the upstream side of the pins 15. It is in principle possible to provide no spacers 16 on the upstream side, because the adjusting blade 7 is pressed in operation against the downstream spacers 16 or against the end of the sliding groove 14. The minimum possible for the Justierschaufel 7 swallowing ability is he ⁇ reaches if none of the spacers 16 are provided on the downstream side ⁇ ing side.
  • All the blades in the first blade ring 11 are designed as adjusting blades 7 and thus designed to be displaceable.
  • the blades could alternately as be performed Justierschaufeln 7 is formed and fixedly attached to the Kegelflä ⁇ chen 2; 3.
  • the inner cone ring 23, the outer cone ring 24 and the fixed blades are made of one piece.
  • a fixed blade to ⁇ together with in each case a segment of the inner cone ring 23 and the outer cone ring 24 is made of one piece and so ⁇ is composed with the first vane ring 11 of a plurality of segments.
  • Inner tapered ring 23 fixedly connected to the shaft 21 and the Justierschaufel 7 arranged with its radially inner side 10 slidably on the inner cone ring 23.
  • the inner cone ring 23 and the Justierschaufel 7 are thus rotating components of the axial turbomachine 1.
  • a gap could be provided between the radial outer side 9 of the movable blade 7 and the cone outer surface 2, a gap could be provided.
  • the adjusting blade 7 could likewise be in engagement with the outer cone ring 24 with its radial outer side 9. In the latter case, the outer cone ring 24 would also be a rotating component.
  • the adjustment of the absorption capacity of the first vane ring 11 is to be carried out as follows: predetermining a desired value of the ability to swallow the blade ring 11; He ⁇ convey the actual value of the absorption capacity of the bucket crane ⁇ zes 11; Comparing the target value of the ability to swallow of the blade ring 11 with the actual value of the ability to swallow the blade ring 11; Moving the at least one adjusting ⁇ blade 7 by means of the guide means parallel to the generating line 6 such that the desired value of the swallowing ability is equal to the actual value of the swallowing ability; Feststel ⁇ len the Justierschaufel 7 with the guide device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne une couronne d'aubes d'une turbomachine axiale (1). Ladite couronne d'aubes comporte une surface extérieure (2) orientée radialement vers l'intérieur, agencée sur une bague extérieure (24), et une surface intérieure (3) orientée radialement vers l'extérieur, agencée sur une bague intérieure (23), lesquelles délimitent un canal d'écoulement (4) annulaire s'amincissant dans la direction principale d'écoulement (17) de la turbomachine axiale (1), et qui sont agencées concentriquement et parallèlement l'une à l'autre. La couronne d'aubes comporte également au moins une aube d'ajustement (7), qui est agencée dans le canal d'écoulement (4) de manière à pouvoir être déplacée au moyen d'un dispositif de guidage (14, 15) parallèlement à une génératrice (6) d'une des surfaces (2, 3) et qui peut être fixée sur au moins une des bagues (23, 24) dans une position prédéterminée.
EP12786929.5A 2012-02-02 2012-11-07 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube Not-in-force EP2788586B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12786929.5A EP2788586B1 (fr) 2012-02-02 2012-11-07 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12153630.4A EP2623717A1 (fr) 2012-02-02 2012-02-02 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube
PCT/EP2012/071992 WO2013113415A1 (fr) 2012-02-02 2012-11-07 Couronne d'aubes d'une turbomachine axiale et procédé permettant d'ajuster la capacité de débit de la couronne d'aubes
EP12786929.5A EP2788586B1 (fr) 2012-02-02 2012-11-07 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube

Publications (2)

Publication Number Publication Date
EP2788586A1 true EP2788586A1 (fr) 2014-10-15
EP2788586B1 EP2788586B1 (fr) 2016-01-20

Family

ID=47178653

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12153630.4A Withdrawn EP2623717A1 (fr) 2012-02-02 2012-02-02 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube
EP12786929.5A Not-in-force EP2788586B1 (fr) 2012-02-02 2012-11-07 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP12153630.4A Withdrawn EP2623717A1 (fr) 2012-02-02 2012-02-02 Couronne d'aube pour une turbomachine axiale et procédé d'ajustement de la capacité de débit massique de la couronne d'aube

Country Status (5)

Country Link
US (1) US20150030431A1 (fr)
EP (2) EP2623717A1 (fr)
JP (1) JP5855768B2 (fr)
CN (1) CN104105844B (fr)
WO (1) WO2013113415A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700061762A1 (it) * 2017-06-06 2018-12-06 Ansaldo Energia Spa Gruppo statorico per uno stadio di espansione radiale-assiale di turbina a vapore

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Also Published As

Publication number Publication date
WO2013113415A1 (fr) 2013-08-08
EP2623717A1 (fr) 2013-08-07
CN104105844A (zh) 2014-10-15
EP2788586B1 (fr) 2016-01-20
CN104105844B (zh) 2016-03-16
JP5855768B2 (ja) 2016-02-09
US20150030431A1 (en) 2015-01-29
JP2015506439A (ja) 2015-03-02

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