EP2310634A2 - Laufschaufelsystem für eine laufschaufelreihe einer strömungsmaschine - Google Patents
Laufschaufelsystem für eine laufschaufelreihe einer strömungsmaschineInfo
- Publication number
- EP2310634A2 EP2310634A2 EP09776055A EP09776055A EP2310634A2 EP 2310634 A2 EP2310634 A2 EP 2310634A2 EP 09776055 A EP09776055 A EP 09776055A EP 09776055 A EP09776055 A EP 09776055A EP 2310634 A2 EP2310634 A2 EP 2310634A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- blades
- turbomachine
- segments
- row
- 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
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008901 benefit Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000003825 pressing 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
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
- F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
-
- 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
- F05D2230/00—Manufacture
- F05D2230/50—Building or constructing in particular ways
- F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
-
- 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
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
-
- 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
- F05D2240/80—Platforms for stationary or moving blades
-
- 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
- F05D2250/00—Geometry
- F05D2250/30—Arrangement of components
- F05D2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
-
- 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
- F05D2250/00—Geometry
- F05D2250/30—Arrangement of components
- F05D2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
- F05D2250/314—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being inclined in relation to each other
-
- 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
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking
-
- 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
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/4932—Turbomachine making
- Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
Definitions
- the invention relates to a blade system referred to in the preamble of claim 1 for a type of blade row of a turbomachine.
- the invention further relates to a turbomachine specified in the preamble of claim 7 and a method for mounting a blade row for a turbomachine.
- the blade system comprises two or more blade segments, of which each blade segment has at least two blades, which are at least predominantly radially arranged between a radially inner and a radially outer shroud with respect to a rotational axis of the blade row and coupled to the shrouds. At least the radially outer shrouds of the blade segments comprise mutually corresponding contact surfaces via which the blade segments abut one another. With the help of the blade segments (so-called cluster), the number of joints and gaps of the blade system can be significantly reduced compared to blade systems from individual o blades.
- attack surfaces provide for guided by the associated turbomachine gases, whereby the durability of such blade systems or blade rows can be increased.
- the blade segments also form mechanically comparatively stable units in the mounted state, whereby relative movements during operation and the associated wear are advantageously reduced.
- a disadvantage of the known blade systems is the fact that the blade segments, in contrast to blade systems from individual o blades, are no longer counteracted by torsion of the blades of a blade row. can be braced each other. As a result, the blade segments are mechanically decoupled from each other and vibrationally difficult to control.
- the object of the present invention is therefore to provide a blade system of the type mentioned at the outset which has improved vibration mechanical properties.
- a rotor blade system according to the invention for a blade row of a turbomachine having improved vibration mechanical properties is provided in that radial equilibrium axes of adjacent blades of the at least two blade segments are each tilted axially at an angle to their respective base pitch, the angles being relative to the base pitch have opposite signs.
- adjacent blades of the at least two blade segments are arranged starting from their respective base inclination tilted like a scissor.
- the base inclination which is also referred to as "lean" usually serves to largely compensate the gas forces which occur during operation of the turbomachine, which generate corresponding bending moments on the rotor blades, at least in certain operating areas of the turbomachine Depending on the design of the turbomachine, this usually amounts to between 0 ° and 2 °, whereby the equilibrium axis can run coaxially or axially parallel to a threading axis of the blade profiles depending on the geometries of the rotor blades. Arrangement of the adjacent blades according to the invention therefore a center of gravity displacement is achieved in particular in the region of the contact surfaces of the radially outer shrouds.
- the blades are cast in the inner shroud and / or in the outer shroud. This allows a cost-effective manner a mechanically stable and reliable connection of the blades to the relevant shroud.
- the contact surfaces are designed as a mechanical latch.
- the pressing forces which can be achieved with the aid of the rotor blade system according to the invention can be distributed over a wide area, so that, in contrast to the prior art, no elastic deformations occur, but the resulting forces in the area of the contact surfaces can be deposited as contact forces.
- This will be a mechanically particularly stable coupling of the at least two blade segments achieved, so that the blade system is not critical vibration mechanics.
- an amount of the angle between 0.1 ° and 10 °, in particular between 0.1 ° and 5 °, and preferably between 0.1 ° and 2 °.
- a turbomachine in particular a thermal gas turbine, with a blade row, which comprises a blade system of at least two blade segments, each of which blade segment at least two blades, with respect to a rotational axis of the blade row at least predominantly radially between a radial arranged inside and a radially outer shroud and are coupled to the shrouds, wherein at least the radially outer shrouds of the two blade segments comprise mutually corresponding application areas, via which the blade segments are coupled together.
- radial equilibrium axes of adjacent blades of the at least two blade segments are each tilted axially at an angle to their respective base pitch, wherein the angles have opposite signs with respect to the base pitch.
- the blade row is arranged in a turbine region, in particular a low-pressure turbine region of the turbomachine.
- a turbine region in particular a low-pressure turbine region of the turbomachine.
- Another aspect of the invention relates to a method for mounting a blade row for a turbomachine, in particular for a thermal gas turbine, in which at least two blade segments of a blade system according to one of the preceding embodiments provided and the respective blades of the at least two blade segments, each axially about an angle (a a, OC 1) are tilted relative to their respective baseline slope, are arranged adjacent to each other, said angle having regard to the base inclination of the blades opposite signs.
- This allows a mechanically stable and vibration-mechanically uncritical assembly of the blade row, whereby a significant reduction in manufacturing costs is given at the same time increased durability.
- Another advantage is that the bracing contact forces between the blade segments only occur speed-dependent during operation of the turbomachine, so that the blade segments are particularly easy to assemble or disassemble in the state.
- Further advantages arise when the connection areas of the blade segments are coupled together without deformation.
- the contact force In contrast to the prior art, in which due to the torsion of the blade profiles against the shrouds, the contact force must be generated at the connection areas by elastic deformation 5 and also acts in the state, can with the aid of the inventive method and the center of gravity displacement of the blades during operation a Preload and thus a vibration mechanical uncritical coupling of the at least two blade segments are achieved without deformation.
- FIGURE shows a schematic perspective view of two coupled blade segments of a blade system for a blade row for arrangement in a low-pressure turbine region of a thermal gas turbine. 5
- each rotor blade segment 10a, 10b comprises in each case four rotor blades 12 (airfoils) which, with respect to an axis of rotation of the blade row mounted in the turbomachine, predominantly radially between a radially inner shroud 14a, 14a 'and a radially outer shroud 14b, 14b 1 arranged and with the.
- Shrouds 14a, 14b and 14a ', 14b' are coupled.
- the radially outer shrouds 14b, 14b 'of the two blade segments 10a, 10b comprise mutually correspondingly formed contact surfaces 16a, 16b, with a Z-shaped profile (so-called Z-shroud).
- the contact surfaces 16a, 16b which are arranged at an angle to one another are designed as mechanical latches.
- the blades 12 are respectively cast into the inner and outer shrouds 14a, 14a ', 14b, 14b' to achieve a mechanically stable connection with low weight. As the multiple blades 12 comprehensive
- Blade segments 10a, 10b in contrast to individual blades 12 no longer by torsion opposite the Deckbändem 14a, 14a ', 14b, 14b' can be braced against each other, the required contact force between the contact surfaces 16a, 16b generated during operation of the associated turbomachine that radial equilibrium axes A adjacent blades 12 of at least The angles ⁇ a, a are arranged tilted two blade segments 10a, 1 Whether each axially by an angle (X 3, a compared to their respective baseline slope (the so-called b. Lean).
- the contact forces increase with the speed. Conversely, no contact force acts between the blade segments 10a, 10b in the stationary state, as a result of which they are correspondingly easy to assemble and disassemble.
- the angles ⁇ a , 0C b are in the illustrated embodiment about ⁇ 1 °. In principle, however, it is possible to choose deviating angles ⁇ or angles of differing magnitude ⁇ a , (X b ) It is preferably provided that the marginal rotor blades 12 of each rotor blade segment 10 are also tilted at mutually opposite angles ⁇ with respect to their respective base inclination can also be provided that inner blades 12 of the respective blade segments 10 are tilted by an angle ⁇ with respect to their respective base inclination.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008038038A DE102008038038A1 (de) | 2008-08-16 | 2008-08-16 | Laufschaufelsystem für eine Laufschaufelreihe einer Strömungsmaschine |
| PCT/DE2009/001094 WO2010020210A2 (de) | 2008-08-16 | 2009-08-01 | Laufschaufelsystem für eine laufschaufelreihe einer strömungsmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2310634A2 true EP2310634A2 (de) | 2011-04-20 |
| EP2310634B1 EP2310634B1 (de) | 2012-03-14 |
Family
ID=41528060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09776055A Not-in-force EP2310634B1 (de) | 2008-08-16 | 2009-08-01 | Laufschaufelsystem für eine laufschaufelreihe einer strömungsmaschine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8684659B2 (de) |
| EP (1) | EP2310634B1 (de) |
| AT (1) | ATE549487T1 (de) |
| CA (1) | CA2734071A1 (de) |
| DE (1) | DE102008038038A1 (de) |
| ES (1) | ES2381817T3 (de) |
| WO (1) | WO2010020210A2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8888459B2 (en) * | 2011-08-23 | 2014-11-18 | General Electric Company | Coupled blade platforms and methods of sealing |
| EP2639004B1 (de) * | 2012-03-15 | 2016-05-11 | MTU Aero Engines GmbH | Schaufelkranzsegment mit Ringraumbegrenzungsfläche mit einem welligen Höhenprofil sowie Verfahren zur Herstellung desselben |
| ITTO20120517A1 (it) * | 2012-06-14 | 2013-12-15 | Avio Spa | Schiera di profili aerodinamici per un impianto di turbina a gas |
| US10774661B2 (en) | 2017-01-27 | 2020-09-15 | General Electric Company | Shroud for a turbine engine |
| CN114233399B (zh) * | 2022-02-23 | 2022-05-17 | 成都中科翼能科技有限公司 | 一种用于控制涡轮转子叶片叶冠接触面接触应力的方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2215407A (en) | 1988-03-05 | 1989-09-20 | Rolls Royce Plc | A bladed rotor assembly |
| GB2251034B (en) * | 1990-12-20 | 1995-05-17 | Rolls Royce Plc | Shrouded aerofoils |
| DE59202211D1 (de) | 1991-08-08 | 1995-06-22 | Asea Brown Boveri | Deckblatt für axialdurchströmte Turbine. |
| FR2851285B1 (fr) | 2003-02-13 | 2007-03-16 | Snecma Moteurs | Realisation de turbines pour turbomachines ayant des aubes a frequences de resonance ajustees differentes et procede d'ajustement de la frequence de resonance d'une aube de turbine |
| WO2005026501A1 (ja) | 2003-09-10 | 2005-03-24 | Hitachi, Ltd. | タービン動翼 |
| US7648334B2 (en) * | 2005-12-29 | 2010-01-19 | Rolls-Royce Power Engineering Plc | Airfoil for a second stage nozzle guide vane |
-
2008
- 2008-08-16 DE DE102008038038A patent/DE102008038038A1/de not_active Withdrawn
-
2009
- 2009-08-01 ES ES09776055T patent/ES2381817T3/es active Active
- 2009-08-01 AT AT09776055T patent/ATE549487T1/de active
- 2009-08-01 EP EP09776055A patent/EP2310634B1/de not_active Not-in-force
- 2009-08-01 CA CA2734071A patent/CA2734071A1/en not_active Abandoned
- 2009-08-01 US US13/059,367 patent/US8684659B2/en not_active Expired - Fee Related
- 2009-08-01 WO PCT/DE2009/001094 patent/WO2010020210A2/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010020210A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE549487T1 (de) | 2012-03-15 |
| CA2734071A1 (en) | 2010-02-25 |
| DE102008038038A1 (de) | 2010-02-18 |
| WO2010020210A2 (de) | 2010-02-25 |
| EP2310634B1 (de) | 2012-03-14 |
| ES2381817T3 (es) | 2012-05-31 |
| US8684659B2 (en) | 2014-04-01 |
| US20110142652A1 (en) | 2011-06-16 |
| WO2010020210A3 (de) | 2010-11-18 |
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