EP2212522A2 - Aktive spaltregeleinrichtung für rotorgehäuse - Google Patents
Aktive spaltregeleinrichtung für rotorgehäuseInfo
- Publication number
- EP2212522A2 EP2212522A2 EP08854397A EP08854397A EP2212522A2 EP 2212522 A2 EP2212522 A2 EP 2212522A2 EP 08854397 A EP08854397 A EP 08854397A EP 08854397 A EP08854397 A EP 08854397A EP 2212522 A2 EP2212522 A2 EP 2212522A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- control device
- housing segments
- gap control
- segments
- 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
Links
- 230000001105 regulatory effect Effects 0.000 title abstract 2
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 5
- 238000000149 argon plasma sintering Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003079 width control Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007056895A DE102007056895A1 (de) | 2007-11-26 | 2007-11-26 | Aktive Spaltregeleinrichtung für Rotorgehäuse |
| PCT/DE2008/001916 WO2009067992A2 (de) | 2007-11-26 | 2008-11-20 | Aktive spaltregeleinrichtung für rotorgehäuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2212522A2 true EP2212522A2 (de) | 2010-08-04 |
| EP2212522B1 EP2212522B1 (de) | 2011-08-10 |
Family
ID=40577086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08854397A Not-in-force EP2212522B1 (de) | 2007-11-26 | 2008-11-20 | Aktive spaltregeleinrichtung für rotorgehäuse |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2212522B1 (de) |
| AT (1) | ATE519923T1 (de) |
| DE (1) | DE102007056895A1 (de) |
| WO (1) | WO2009067992A2 (de) |
Families Citing this family (7)
| 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 |
| 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 |
| US10815816B2 (en) * | 2018-09-24 | 2020-10-27 | General Electric Company | Containment case active clearance control structure |
Family Cites Families (3)
| 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 |
-
2007
- 2007-11-26 DE DE102007056895A patent/DE102007056895A1/de not_active Withdrawn
-
2008
- 2008-11-20 AT AT08854397T patent/ATE519923T1/de active
- 2008-11-20 WO PCT/DE2008/001916 patent/WO2009067992A2/de not_active Ceased
- 2008-11-20 EP EP08854397A patent/EP2212522B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009067992A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2212522B1 (de) | 2011-08-10 |
| WO2009067992A2 (de) | 2009-06-04 |
| ATE519923T1 (de) | 2011-08-15 |
| WO2009067992A3 (de) | 2010-01-28 |
| DE102007056895A1 (de) | 2009-05-28 |
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