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WO2009067992A2 - Dispositif actif de régulation du jeu pour des carters de rotor - Google Patents

Dispositif actif de régulation du jeu pour des carters de rotor Download PDF

Info

Publication number
WO2009067992A2
WO2009067992A2 PCT/DE2008/001916 DE2008001916W WO2009067992A2 WO 2009067992 A2 WO2009067992 A2 WO 2009067992A2 DE 2008001916 W DE2008001916 W DE 2008001916W WO 2009067992 A2 WO2009067992 A2 WO 2009067992A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
control device
housing segments
gap control
segments
Prior art date
Application number
PCT/DE2008/001916
Other languages
German (de)
English (en)
Other versions
WO2009067992A3 (fr
Inventor
Erwin Bayer
Roland Huttner
Original Assignee
Mtu Aero Engines Gmbh
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 Mtu Aero Engines Gmbh filed Critical Mtu Aero Engines Gmbh
Priority to AT08854397T priority Critical patent/ATE519923T1/de
Priority to EP08854397A priority patent/EP2212522B1/fr
Publication of WO2009067992A2 publication Critical patent/WO2009067992A2/fr
Publication of WO2009067992A3 publication Critical patent/WO2009067992A3/fr

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
    • 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
    • F01D11/14—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing
    • F01D11/20—Actively adjusting tip-clearance
    • F01D11/22—Actively adjusting tip-clearance by mechanically actuating the stator or rotor components, e.g. moving shroud sections relative to the rotor
    • 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
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/11—Shroud seal segments
    • 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
    • F05D2260/00—Function
    • F05D2260/50—Kinematic linkage, i.e. transmission of position
    • F05D2260/52—Kinematic linkage, i.e. transmission of position involving springs
    • 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
    • F05D2260/00—Function
    • F05D2260/50—Kinematic linkage, i.e. transmission of position
    • F05D2260/56—Kinematic linkage, i.e. transmission of position using cams or eccentrics

Definitions

  • the present invention relates to an active gap control device for rotor housing of a turbomachine according to the preamble of patent claim 1 and to a method for the production thereof.
  • the setscrews of all housing segments are actuated together via a synchronizing ring, whereby a common and simultaneous adjustment of the housing segments is made possible. This allows a uniform adjustment of the gap width between the respective housing segment and rotor blade tip over the entire rotor circumference.
  • biasing elements in the form of leaf or wave springs are used between the individual housing segments and the rotor housing, which are supported on the inner wall of the rotor housing and so the individual housing segments radially inward, i. in the direction of the rotor blades.
  • the present invention is therefore an object of the invention to provide a generic gap control device for rotor housing, which is easier to produce with high reliability. Furthermore, the simplest possible and therefore cost-effective production method should be provided.
  • the essence of the invention is therefore to connect the ring segments together in a housing segment or Shrouds respectively via spring elements which exert a spring force on the housing segments in the design position, which leads to a widening of the ring.
  • the design of the spring elements causes at least a partial widening of the ring with a corresponding enlargement of the gap between the spring elements and the blade tips of the rotor. A scratching of the blade tips on the housing segments is thus prevented in any case.
  • the method according to the invention for producing such a housing segment ring basically envisages the use of a "rapid manufacturing method", ie the spring elements are formed as integral components of the housing segments "(Rapid manufacturing process) using a laser (eg a CO2 laser) made.
  • a laser eg a CO2 laser
  • This enables the cost- favorable production of the housing segments and possibly simultaneously the spring elements, preferably by laser sintering, that is, by a generative method in which the finished product is produced directly from CAD data without the provision of tools.
  • Fig. 1 shows the schematic diagram of a gap control device for rotor housing according to a first preferred embodiment of the invention in cross-section and
  • Fig. 2 shows the schematic diagram of a gap control device for rotor housing according to a second preferred embodiment of the invention also in cross section, wherein the same components are provided with the same reference numerals for the first embodiment.
  • the gap control device for rotor housing of a turbomachine has a number of housing segments 1 assembled into a ring (in FIG. 1, there are only two segments shown) and a number of actuators 2 for actuating the housing segments 1 in the radial direction of the ring formed thereof.
  • the housing segments 1 are formed in an essentially plate-shaped manner and are arranged at a circumferential distance from one another such that a radial gap or expansion joint 3 is formed between each two housing segments 1 adjoining the front side.
  • Each two adjacent housing segments 1 are further connected to each other via a spring element or component 4, which is constructed and connected to the respective housing segments 1, that in the structural position (corresponds to a closed ring) exerts a radially outwardly directed biasing force component on the housing segments 1 which causes a radial expansion of the ring formed by the housing segments 1.
  • the spring component 4 as a the expansion joint 3 bridging, annular spreading or leg spring is shown, which is integrally connected to the two adjacent housing segments 1.
  • This spring acts on the two housing segments 1 substantially in the tangential direction, resulting in the application of two such spring elements on opposite end faces of the housing segment, a resulting biasing force in the radial direction to the outside.
  • the structural design of the housing segment 1 with the spring element 4 arranged on the front side permits the use of the so-called "rapid manufacturing process.”
  • the housing segment or housing segments and at the same time the spring elements are preferably made of a sintered material in layers
  • a laser preferably a CO2 laser powder particle
  • the spring constant can be adjusted in the course of the production process. that the spring element 4 in the idle state (construction position) generates the largest radial gap and thus basically causes a widening tendency of the ring against the actuation force of the actuators.
  • a rocker arm assembly 5 is provided for transmitting the actuating movement of the respective actuator 2 to the associated housing segment. 1
  • each actuator 2 is designed as a hydraulic, pneumatic or electromotive drive with an axially movable piston rod 6, which is articulated at its distal end to a rocker arm 7.
  • Each actuator 2 is preferably fixed to an outer housing 8 surrounding the rotor, not shown, on its outer side.
  • Each associated rocker arm 7, which penetrates the outer housing 8, is L-shaped and has in its central portion a fixed pivot point 9 for the stationary articulation of the lever 7, for example on the actuator housing or, as provided in the preferred embodiment, on the outer or rotor housing 8 of the turbomachine itself.
  • Located within the rotor housing 8 free leg of each lever 7 is preferably hingedly coupled to a single housing segment 1. Alternatively, it is also possible to drive a plurality of housing segments with a single actuator.
  • each L-shaped lever 7 is aligned so that its free leg virtually extends back in the direction of the actuator 2, so that the articulation point 10 between the free leg of the lever 7 and the housing segment 1 radially below Actuator 2 and is located substantially in the middle portion of the housing segment 1.
  • the maximum actuation travel of each housing segment 1 and the actuation force that can be exerted thereon can therefore be pre-set via the lever ratios. This allows a reduction in the actuation force and thus a weaker and thus lighter design of the actuator. 2
  • the operation of the gap control device is as follows: In construction position of the housing segments 1, the expansion joints 3 bridging spring elements 4 are held under pretension, such that they exert a biasing force on the housing segments 1 radially outward. As a result, a counter force is permanently generated by the actuator 2 via the piston rod 6 and the rocker arm 7 articulated thereon for stabilizing the corresponding housing segment 1, as a result of which the articulation points 9, 10 of the rocker arm 7 are free of play.
  • the individual actuators 2 are driven by a control electronics, not shown, to effect a lifting movement of the piston rods 6.
  • This lifting movement is translated via the rocker arm 7 in a radial movement of the housing segments 1, which leads to a radial expansion or constriction of the ring formed thereof.
  • the inevitably occurring change in the circumference of the ring is compensated by the expansion joints 3 or the spring elements 4 connecting the housing segments 1.
  • the housing segments 1 can be operated individually, whereby the ring can also be adapted to an ovalization of the rotor housing 8.
  • each housing segment 1 consists of the shell-shaped plates, as they have already been described with reference to the first embodiment, to which, however, additionally a radially inner side, a guide blade assembly is attached.
  • this comprises a number of radial guide vanes 12, which are connected to one another radially on the inside via a guide plate 13 extending in the circumferential direction. All other structural features with respect to actuators 2, lever assembly 5 and spring elements 4 correspond unchanged to the first exemplary embodiment, so that reference may be made at this point to the above text passages.
  • the production of the housing segments 1 together with the associated guide blade segments 11 is carried out according to the above "rapid manufacturing principle" preferably to a one-piece Shroudmodul.
  • baffles 13 of the frontally adjacent modules are not connected by spring elements, but form an expansion joint 14, which may be sealed with a deformable, flexible filling material.

Landscapes

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

Abstract

L'invention concerne un dispositif de régulation du jeu destiné à des carters de rotor d'une turbomachine et comprenant un certain nombre de segments de carter assemblés en un anneau, ainsi qu'un certain nombre d'actionneurs pour l'actionnement des segments de carter en sens radial. Un système de levier basculant sert à transmettre le mouvement d'actionnement de chaque actionneur au ou aux segments de carter correspondants. Les segments de carter, de préférence en matériau fritté, sont précontraints pour un élargissement de l'anneau. Les ressorts nécessaires à cet effet sont réalisés d'un seul tenant avec les segments de carter et relient élastiquement entre eux respectivement deux segments de carter adjacents.
PCT/DE2008/001916 2007-11-26 2008-11-20 Dispositif actif de régulation du jeu pour des carters de rotor WO2009067992A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT08854397T ATE519923T1 (de) 2007-11-26 2008-11-20 Aktive spaltregeleinrichtung für rotorgehäuse
EP08854397A EP2212522B1 (fr) 2007-11-26 2008-11-20 Dispositif actif de régulation du jeu pour des carters de rotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007056895.0 2007-11-26
DE102007056895A DE102007056895A1 (de) 2007-11-26 2007-11-26 Aktive Spaltregeleinrichtung für Rotorgehäuse

Publications (2)

Publication Number Publication Date
WO2009067992A2 true WO2009067992A2 (fr) 2009-06-04
WO2009067992A3 WO2009067992A3 (fr) 2010-01-28

Family

ID=40577086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001916 WO2009067992A2 (fr) 2007-11-26 2008-11-20 Dispositif actif de régulation du jeu pour des carters de rotor

Country Status (4)

Country Link
EP (1) EP2212522B1 (fr)
AT (1) ATE519923T1 (fr)
DE (1) DE102007056895A1 (fr)
WO (1) WO2009067992A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160356169A1 (en) * 2015-06-04 2016-12-08 United Technologies Corporation Turbine engine tip clearance control system with rocker arms
US9752450B2 (en) 2015-06-04 2017-09-05 United Technologies Corporation Turbine engine tip clearance control system with later translatable slide block

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009023062A1 (de) * 2009-05-28 2010-12-02 Mtu Aero Engines Gmbh Spaltkontrollsystem, Strömungsmaschine und Verfahren zum Einstellen eines Laufspalts zwischen einem Rotor und einer Ummantelung einer Strömungsmaschine
GB0916892D0 (en) 2009-09-28 2009-11-11 Rolls Royce Plc A casing component
US9488063B2 (en) * 2013-09-12 2016-11-08 General Electric Company Clearance control system for a rotary machine and method of controlling a clearance
US9915163B2 (en) * 2015-05-15 2018-03-13 United Technologies Corporation Cam-follower active clearance control
US10815816B2 (en) * 2018-09-24 2020-10-27 General Electric Company Containment case active clearance control structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108591A (en) * 1981-11-03 1983-05-18 Rolls Royce Casing of a gas turbine engine rotor
US5104287A (en) * 1989-09-08 1992-04-14 General Electric Company Blade tip clearance control apparatus for a gas turbine engine
CN1215251C (zh) * 1996-08-05 2005-08-17 罗纳德·E·布兰登 流体涡轮机的密封装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160356169A1 (en) * 2015-06-04 2016-12-08 United Technologies Corporation Turbine engine tip clearance control system with rocker arms
US9752450B2 (en) 2015-06-04 2017-09-05 United Technologies Corporation Turbine engine tip clearance control system with later translatable slide block
US9784117B2 (en) * 2015-06-04 2017-10-10 United Technologies Corporation Turbine engine tip clearance control system with rocker arms

Also Published As

Publication number Publication date
WO2009067992A3 (fr) 2010-01-28
EP2212522B1 (fr) 2011-08-10
EP2212522A2 (fr) 2010-08-04
DE102007056895A1 (de) 2009-05-28
ATE519923T1 (de) 2011-08-15

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