EP1707747A1 - Système de fixation des pieds d'aubes et procédé de montage correspondant - Google Patents

Système de fixation des pieds d'aubes et procédé de montage correspondant Download PDF

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Publication number
EP1707747A1
EP1707747A1 EP05005990A EP05005990A EP1707747A1 EP 1707747 A1 EP1707747 A1 EP 1707747A1 EP 05005990 A EP05005990 A EP 05005990A EP 05005990 A EP05005990 A EP 05005990A EP 1707747 A1 EP1707747 A1 EP 1707747A1
Authority
EP
European Patent Office
Prior art keywords
blade
blade root
groove
turbine part
conical shape
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.)
Withdrawn
Application number
EP05005990A
Other languages
German (de)
English (en)
Inventor
Frank Brumbi
Markus Kupetz
Ulrich Stanka
Heinrich Dr. Stüer
Mesut Tunc
Jörg Wagemakers
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 EP05005990A priority Critical patent/EP1707747A1/fr
Publication of EP1707747A1 publication Critical patent/EP1707747A1/fr
Withdrawn legal-status Critical Current

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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
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • 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
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/644—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins for adjusting the position or the alignment, e.g. wedges or eccenters
    • 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
    • F05D2250/20—Three-dimensional
    • F05D2250/23—Three-dimensional prismatic
    • F05D2250/232—Three-dimensional prismatic conical
    • 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

Definitions

  • the invention relates to a turbine part with a number of blades, which are held in a groove of the turbine part, wherein a blade has a blade root arranged in the groove.
  • the invention further relates to a method for mounting a blade in a turbine part, in which a turbine part is provided with a groove and a blade root of a blade is arranged in the groove.
  • a turbine is subjected to the production of rotational energy in a flow channel with working fluid.
  • a number of blades is arranged, which are flowed through by the working medium.
  • a blade has an airfoil projecting into the flow channel and a blade root attached to the turbine part.
  • a turbine part may be understood to mean a turbine rotor and / or a turbine housing or another part.
  • a distinction is made between a vane and a rotor or rotor blade.
  • a blade is disposed with its blade root in a groove of the rotor, and a blade blade receives kinetic energy of the working fluid such that the rotor is rotated by the blades.
  • a vane is attached to the non-rotatable turbine housing.
  • a vane is held with its vane root in a groove of the turbine housing, wherein a vane has a arranged in the groove Leitschaufelfuß.
  • a vane blade protrudes into the flow channel and serves to guide the flow medium in order to guide it as effectively as possible onto a blade blade.
  • a blade ring is formed by a number of blades, the blade roots being held in a groove of the turbine part oriented along an annular periphery, and an airfoil oriented along a ring radius is.
  • the blade With a blade, the blade is facing outward from the rotor into the flow channel.
  • the vane blade With a guide vane, the vane blade from the turbine housing radially inwardly into the flow channel.
  • a bucket may also have a bucket tip.
  • a previously known possibility of the high load to meet is to set the blade root by a specially adapted to the geometry between the blade root and its surroundings fitting.
  • the geometrically adapted fitting is z. B. specially shaped and inserted on the geometry of a gap or gap between the blade root and Nutberandung. Accordingly, a geometrically adapted fitting piece can be shaped and inserted especially for a geometry between two blade roots. In this way, a fitting completely fills the space between a blade root and a groove or between two adjacent blade roots and sets the blade root either against a Nutberandung and / or against an adjacent blade root.
  • Another possibility is to fix a blade root on the turbine part in the groove, for example by a welded or soldered connection.
  • the invention begins, whose task is to provide a device and a method, on the one hand, a tight fit of a blade is ensured and on the other hand, a mounting of a blade is facilitated.
  • the object is achieved by the invention with a turbine part of the type mentioned, in which according to the invention the blade root is fixed by a conical shape exhibiting Stemm collaboration.
  • the object is achieved by the invention with a method of the type mentioned, in which according to the invention the blade root is staked by a conical shape exhibiting Stemm strat by the Stemm judges is introduced with a conically tapered side in a gap next to the blade root.
  • the blade root can also be staked by a Stemm von having a conical shape by the Stemm collaborate is introduced with a conically tapered side in a gap between two adjacent blade roots of two adjacent blades.
  • the invention has recognized that, unlike a fitting previously used in attachment of a blade, the use of a conically shaped Stemm Huaweis for caulking a blade root in a groove has considerable advantages in a mounting and at the same time a firm seat of the blade to the groove and a ensure tight fit of blades with each other.
  • the conical shape can namely the tolerance of the components, d. H. the groove and the blade foot, coarser than previously chosen. In particular, it largely eliminates the need for each space on each blade root to perform a separate survey in order to then form a fitting fit accurately.
  • a conically shaped caulking piece can be made in a relatively wide range of dimensions of interspaces, i. H. are used largely independent of a present in a single blade root geometric environment, for staking a blade root against the groove or against an adjacent blade root.
  • the invention is based on the consideration that a conical shape of a Stemmfurs usually ensures that a plurality of distances between two opposite sides of the Stemm concernss are provided. Depending on the existing geometric situation so can a Stemm thoroughly situationally more or less deeply placed next to a blade root to festsstemmen this. If there is a gap of larger dimension adjacent the blade root, the caulking piece is inserted comparatively deep into the gap to firmly stare the blade root with the wider base of the butted form. If there is a gap of smaller dimension next to the blade root, it may be sufficient to place the caulking piece relatively low in the gap to stare the blade root with the less wide tip of the butted form.
  • the conical shape extends over a majority of a longitudinal axis of the Stemm couples. This has the advantage that a wider range of distances with a finer pitch can be provided by the caulking piece. Thus, the same Stemm sau can be used for a wider range of gaps and on the other hand, due to the finer pitch, a blade root particularly well.
  • the conical shape can be, for example, multiple butted, for example having a plurality of sections of different pitches.
  • the conical shape could also be variably butted, for example with a suitably curved curve.
  • the caulking behavior of the caulking piece can be increased as needed in the region of the base or the tip of the conical shape or, overall, can be suitably adapted to a space next to a blade root.
  • a particularly simple embodiment is achieved in that the conical shape has two non-parallel clamping surfaces.
  • an opening angle of the conical shape between 4 ° and 20 ° is particularly useful.
  • an opening angle of the conical shape between 5 ° and 8 ° has proven advantageous in order to clamp a blade root in a groove of a turbine part.
  • the Stemm consortium can be arranged between the blade root and a boundary of the groove.
  • a first of two non-parallel extending caulking surfaces bears against a blade root and a second of two non-parallel caulking surfaces against a groove inner side.
  • the Stemm consortium can be arranged between two adjacent blade roots of two adjacent blades. For example, a first of two non-parallel stemming surfaces abut a first blade root of a first blade and a second of two non-parallel extending caulking surfaces abut a second blade root of a second adjacent blade.
  • This has the advantage that a number of blades of a blade ring are clamped relative to each other and yet sufficient freedom of movement degrees are available in relation to the groove. This can be advantageous, for example, for a readjustment or within the scope of thermal movements of the individual blades.
  • the turbine part is formed in the form of a turbine housing, wherein a blade in the form of a guide vane is formed.
  • the guide vane may be part of a guide vane ring.
  • a blade root of a blade in a groove is staked by a conically shaped Stemm ma.
  • the Stemm von Gies is practically used as a wedge, so that an installation process of a blade in a groove of a turbine part, although basically can be carried out as before.
  • a conically shaped Stemm congress proves to be advantageous because a considerable time savings and cost savings during assembly arises because less measuring and adjustment effort is available and beyond coarseness tolerances of the components, such as the blade root or the groove , can be accepted.
  • FIG. 1 shows a not-shown turbine part 1 in the form of a turbine housing with a groove 5 oriented along a ring circumference 3.
  • FIG. 1 thus shows the guide blade 7 practically in the direction of the circumference of the ring.
  • a number of schematically illustrated guide vanes 7 is held in the groove.
  • the number of guide vanes 7 thereby form a blade ring (not shown) which is arranged around a flow channel 17 which can be acted upon by working medium.
  • a vane 7 has a blade root 9, an airfoil 11 and a blade head 13.
  • the blade root 9 is arranged in the groove 5 and the blade 11 is oriented with the blade head 13 along a ring radius 15, so that the blade 11 extends into the flow channel 17, not shown.
  • FIG 2A This situation is shown in FIG 2A as a plan view, ie in a viewing direction in the direction of the ring radius 15, wherein the same reference numerals are used as in FIG.
  • two blades 9 are shown in FIG 2A as part of a blade ring, not shown, which arises from a number of blades 9, which are held in a groove 5 of the turbine part 1 oriented along the ring circumference 3.
  • the turbine part 1 For mounting a blade 7 in a turbine part 1, the turbine part 1 is provided with the groove 5 and a blade root 9 of the blade 7 is arranged in the groove 5.
  • a blade root 9 of the blade 7 is inserted into the groove 5 along the guide provided by the tongue and groove connection 21.
  • the blade root 9 is staked by a caulking piece 25 having a conical shape, with the caulking piece 25 having a conically tapered side 27, ie in the direction of the arrow 29 in FIG the gap 5 is placed next to the blade root 9.
  • the blade root 9 is clamped by the Stemm Culture 25, which is similar to a wedge in the space 35 between the blade root 9 and Nutberandung 31, between the Nutberandung 31 and another Nutberandung 33.
  • the Stemm lab 25 may have a conical shape, which is suitable for a plurality of intermediate spaces 35 in order to clamp the blade 7 in the groove 5 between the Nutberandungen 31, 33.
  • the concept of the preferred embodiment described hereinbefore has the advantage that a certain degree of freedom, for example for compensating thermal expansions, is still present in the case of a blade 7 which is not firmly attached or a blade 7 which has not been fixed precisely. Overall, therefore, a setting effort in the assembly of a blade 7 is reduced, since the tolerances for the production of the components, in particular in the form of a blade root 9 and the groove 5, can be coarser than usual methods.
  • FIG 2B a particularly preferred embodiment of a Stemm Kunststoffs 25 is shown in section.
  • the cut has a trapezoidal surface.
  • the caulking piece 25 has a first caulking surface 37 and a second caulking surface 39, which do not run parallel.
  • a schematically represented angle ⁇ between The first caulking surface 37 and the second caulking surface 39 in the particularly preferred embodiment of the caulking piece 25 shown here are 7 ° and in particular lie between 5 ° and 8 °.
  • the conical shape of the Stemm griss 25 formed by the two non-parallel Stemm vom 37, 39 extends over the entire longitudinal axis 41 of the Stemm coupless.
  • the Stemms can also have a multi-conical conical shape or have a variably conical conical shape to adapt the Stemm to certain applications.
  • different Stemm thoroughlye can be used for the case that the Stemmcreme between a blade root 9 and a boundary 31 of a groove 5 is arranged or for the not explained in the context of the figure description case that a Stemm suit between two adjacent blade roots 9 is arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP05005990A 2005-03-18 2005-03-18 Système de fixation des pieds d'aubes et procédé de montage correspondant Withdrawn EP1707747A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05005990A EP1707747A1 (fr) 2005-03-18 2005-03-18 Système de fixation des pieds d'aubes et procédé de montage correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05005990A EP1707747A1 (fr) 2005-03-18 2005-03-18 Système de fixation des pieds d'aubes et procédé de montage correspondant

Publications (1)

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EP1707747A1 true EP1707747A1 (fr) 2006-10-04

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EP05005990A Withdrawn EP1707747A1 (fr) 2005-03-18 2005-03-18 Système de fixation des pieds d'aubes et procédé de montage correspondant

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704001A1 (de) * 2010-10-26 2012-04-30 Alstom Technology Ltd Leitschaufelanordnung einer Strömungsmaschine, insbesondere eines Axialkompressors.
CN110434639A (zh) * 2019-08-23 2019-11-12 四川绵竹鑫坤机械制造有限责任公司 一种用于叶片的自动定心装置及其方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024983B (de) * 1954-02-16 1958-02-27 Siemens Ag Anordnung an axial beaufschlagten Turbinen, deren Schaufeln mit Formschluss in eine Ringnut des Schaufeltraegers eingesetzt sind
GB1080026A (en) * 1963-11-01 1967-08-23 Sulzer Ag Improvements relating to the fixing of turbine and compressor blades
US3734645A (en) * 1969-12-12 1973-05-22 Bbc Sulzer Turbomaschinen Turbine blade assembly
US3997280A (en) * 1974-06-21 1976-12-14 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Stators of axial turbomachines
US5236309A (en) * 1991-04-29 1993-08-17 Westinghouse Electric Corp. Turbine blade assembly
US5282720A (en) * 1992-09-15 1994-02-01 General Electric Company Fan blade retainer
US20010022936A1 (en) * 2000-03-14 2001-09-20 Achim Zimmermamm Blade lock and process for manufacturing a blade lock

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024983B (de) * 1954-02-16 1958-02-27 Siemens Ag Anordnung an axial beaufschlagten Turbinen, deren Schaufeln mit Formschluss in eine Ringnut des Schaufeltraegers eingesetzt sind
GB1080026A (en) * 1963-11-01 1967-08-23 Sulzer Ag Improvements relating to the fixing of turbine and compressor blades
US3734645A (en) * 1969-12-12 1973-05-22 Bbc Sulzer Turbomaschinen Turbine blade assembly
US3997280A (en) * 1974-06-21 1976-12-14 Societe Nationale D'etude Et De Construction De Moteurs D'aviation Stators of axial turbomachines
US5236309A (en) * 1991-04-29 1993-08-17 Westinghouse Electric Corp. Turbine blade assembly
US5282720A (en) * 1992-09-15 1994-02-01 General Electric Company Fan blade retainer
US20010022936A1 (en) * 2000-03-14 2001-09-20 Achim Zimmermamm Blade lock and process for manufacturing a blade lock

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704001A1 (de) * 2010-10-26 2012-04-30 Alstom Technology Ltd Leitschaufelanordnung einer Strömungsmaschine, insbesondere eines Axialkompressors.
CN110434639A (zh) * 2019-08-23 2019-11-12 四川绵竹鑫坤机械制造有限责任公司 一种用于叶片的自动定心装置及其方法
CN110434639B (zh) * 2019-08-23 2024-05-07 四川绵竹鑫坤机械制造有限责任公司 一种用于叶片的自动定心装置及其方法

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