EP2022944A1 - Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable - Google Patents

Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable Download PDF

Info

Publication number
EP2022944A1
EP2022944A1 EP07014817A EP07014817A EP2022944A1 EP 2022944 A1 EP2022944 A1 EP 2022944A1 EP 07014817 A EP07014817 A EP 07014817A EP 07014817 A EP07014817 A EP 07014817A EP 2022944 A1 EP2022944 A1 EP 2022944A1
Authority
EP
European Patent Office
Prior art keywords
blade
cavity
blade root
arrangement according
base body
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Withdrawn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
EP07014817A
Other languages
German (de)
English (en)
Inventor
Richard Geist
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 EP07014817A priority Critical patent/EP2022944A1/fr
Publication of EP2022944A1 publication Critical patent/EP2022944A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • F01D5/3053—Fixing blades to rotors; Blade roots ; Blade spacers by means of pins
    • 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
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics

Definitions

  • the invention relates to an arrangement with at least one blade of a turbomachine and a base body, wherein the blade comprises an airfoil and a blade root, wherein the blade is secured by means of the blade root on the base body in a recess.
  • turbomachines such as steam turbines, gas turbines or compressors
  • blades attached to a rotor or housing inner wall that form a blade stage in a respective composite.
  • the blades or composites attached to the rotor are referred to as blade stages due to their rotation, and the stator blades attached to the housing. Due to the regularly very high rotational speeds of the rotor, the blades are subject to a higher mechanical load as a result of centrifugal force.
  • the centrifugal force acting on a single blade can reach an order of magnitude corresponding to a weight of 500 t.
  • the individual grooves or recesses for the individual blade are generally grooves with open end walls, in which the blade are inserted with its foot and secured by mechanical fasteners against a substantially axial mispositioning.
  • the receiving groove or receiving recess running in the circumferential direction, there is a problem in that the regularly provided positive locking in the radial direction precludes radial insertion of the blade root into the rotor or the housing. For this reason, at least the rotor is provided at a circumferential position of the circumferential groove with a so-called Einfühllötechnisch into which each individual blade is inserted radially and is displaced in the circumferential direction to its end position.
  • the individual blade roots are introduced and displaced on the open end side of the circumferential groove in the region of the parting line in the circumferential direction.
  • a filling opening is provided in a case without horizontal parting line, which interrupts the circumferential groove.
  • the invention has the object, a To provide arrangement of the type mentioned, which allows a simplified attachment with high reliability.
  • an arrangement of the type mentioned is proposed for solution in which at least one lateral boundary surface of the blade root together with a second boundary surface of the recess forms a cavity, which cavity is filled by means of a thermosetting ceramic material or a hardening ceramic adhesive.
  • the blade with its blade root can also be inserted radially into the recess for receiving and undergoes its radial fixation by means of the ceramic adhesive introduced into the resulting cavity or the ceramic mass.
  • This input ceramic substance cures and also radially fixes the blade to the base body.
  • the cured ceramic substance or the ceramic material or the ceramic adhesive meets all the requirements that regularly occur during operation of a turbo set, in particular, it effortlessly endures particularly high and possibly also very low temperatures.
  • Another advantage is that the input ceramic substance fits precisely into the shape of the cavity and ultimately forms a clearance-free fitting in the cavity. In this way follows the introduction of force as a result of centrifugal forces on the resulting cured ceramic element particularly evenly and distributed over the entire contact surface or boundary surface so that it does not lead to voltage spikes that could lead to failure of the component.
  • the resulting ceramic fitting regularly has a particularly high compressive strength, as it is expedient for such a fitted mold element.
  • Another outstanding advantage is that the lateral first and second boundary surfaces do not require particularly precise production, since the ceramic material or the hardening ceramic adhesive adapt to the predetermined shape as a result of their initially liquid state without play. This attachment method requires no special skills and is flexibly executable almost without any mechanical equipment in any place quickly.
  • the ceramic composition is a substance which consists largely of inorganic, fine-grained raw materials and hardens to a hard, durable element.
  • the ceramic composition also includes the use of metal oxides and fiber reinforced ceramics. It is also conceivable to use silicon-containing organic polymers (polycarbosilanes) as starting material.
  • the ceramic composition may be a two- or more-component casting compound, which may be curing at room temperature. Such compositions have a high temperature resistance of up to 1000 ° C in the cured state.
  • the invention is applicable to an arrangement of a plurality of juxtaposed blades in a blade assembly, wherein the blades have an airfoil and a blade root and into a body in a recess which forms a in a substantially symmetrical to a circumferential direction of a machine axis groove, are used.
  • the blades of the blade assembly are in this case held by means of their blade roots form-fitting radially on the base body, wherein the groove has at least one single opening into which the Blades are insertable and are displaceable in the circumferential direction in an end position, wherein in the circumferential position of the filling opening a closing blade with a blade root and an airfoil is arranged, wherein at least one lateral boundary surface of the closing blade foot together with a second lateral boundary surface of the groove forms a hollow space, which cavity is filled by means of a hardening ceramic material or a hardening ceramic adhesive.
  • This arrangement has advantages which correspond to those of the aforementioned arrangement. All subsequent explanations concerning further developments of the attachment of a blade or of a blade root are correspondingly, in the spirit of the invention, also advantageously applicable to a closing blade or a closing blade root.
  • the blade root has at least one protruding into the cavity or in the cavity on one side of the airfoil limiting lateral first projection.
  • This embodiment provides a particularly robust positive locking, the radial disengagement of the blade, especially under the effect of centrifugal force, reliably prevented.
  • the base body has at least one lateral second projection which projects into the cavity or which delimits the hollow space on the side of the blade. The combination of the first projection with the second projection completes the force flow of the positive connection between the blade over the blade root over the hardened ceramic substance into the base body.
  • the blade root forms with the main body two similar cavities filled with ceramic material or ceramic adhesive.
  • These cavities may be in the case of the blade assembly expedient in the circumferential direction on two opposite lateral boundary walls of a provided in the body groove for receiving the blade roots. In either case, moment loading is prevented or minimized when the cavities are on two opposite sides of the blade root.
  • At least one filling channel should be provided which leads either to the cavity through the main body or through the blade and blade root.
  • the filling should be in the interest of complete filling of the cavity with prior or synchronous venting of the cavity.
  • a separate vent channel lead to the cavity or the filling channel can simultaneously serve the vent, in which in particular a separate filling line through the filling channel leads into the cavity and the vent next to the filling line through the filling channel.
  • the filling channel extends through both the blade root and the blade, so that a particularly comfortable accessibility is given.
  • the corresponding fitting is inserted in a cavity formed by the respective blade and the body by lateral boundary walls in the circumferential direction, until all blades are inserted over the circumference including a closing blade, the closing blade in the absence of a possibility of inserting a fitting without fitting is inserted into the circumferential groove and the corresponding cavity or the corresponding cavities for the fittings are filled by means of a hardening ceramic material or a hardening ceramic adhesive.
  • FIG. 1 and FIG. 2 show a sectional view of an arrangement 1 according to the invention, comprising a blade 2 and a base body 3.
  • the blades 2 shown each consist of an airfoil 4 and a blade root 5, wherein the embodiments of the blade 2 shown always also have a cover plate 6 mounted on the other side of the blade root 5 on the blade 4, which in a blade assembly 7, as in FIG. 6 shown, in the juxtaposition of the blades 2, form a shroud 8.
  • the invention is also applicable to blades 2 without cover plate 6.
  • the blade assembly 7 forms in a extending over an entire circumference of a machine axis 9 arrangement a blade stage, as it is not shown here in full.
  • the main body 3 may be either a housing 10 or a rotor shaft 11.
  • FIG. 1 shows that the blade root 5 with a first lateral boundary surface 15 together with a second boundary surface 16 of the base body 3 includes a cavity 17 in a recess 18, in which the blade root 5 is inserted.
  • This cavity 17 is filled by means of a ceramic material or a ceramic adhesive 19 which hardens.
  • the filling takes place through a filling channel 20, wherein the filling channel 20 in FIG. 1 extending through the airfoil 4 and the blade root 5 into the cavity 17.
  • the arrangement with the cavity 17 is formed symmetrically with respect to a plane 21 extending through a blade longitudinal axis 21, so that two cavities 17, on each side of the blade root 5 one, are provided.
  • FIG. 1 still insight through the body 3 extending venting channel 22 are provided for venting the cavities 17.
  • the venting takes place through the filling channel 20th
  • the cavities 17 are bounded on the other side of the blade 4 by a lateral first projection 31 of the blade root 5. This side of the airfoil 4, the cavities 17 are each bounded by a second projection 32 of the base body 3.
  • the cavities 17 each have a substantially cylindrical shape with a curvature corresponding to a circumferential direction 33, the cylindrical shape having a circular cross-section 34.
  • FIG. 6 and the FIGS. 3, 4 and 5 put the Figures 1 and 2 Possibilities for the formation of a closing blade 40 of the respective blade assembly 7.
  • the blade assembly 7 extending in the circumferential direction 33 for example a blade stage or a guide blade stage, requires, due to the positive radial fastening by means of fitting pieces 44, in cavities 17 between second boundary surfaces 16 of the recess 18. which is formed in the form of a groove 45 and first boundary surfaces 15 are used, the provision of a arranged in a certain circumferential position the filling opening 41 into which a closing blade root 42 of the closing blade 40 is inserted. This is the case in particular because the fitting pieces 44 are inserted into the cavities 17 in the circumferential direction 33.
  • the closing blade 40 of the arrangement, according to the FIGS. 3 to 6 According to the invention in the Figures 1 and 2 shown manner attached to the base body 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP07014817A 2007-07-27 2007-07-27 Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable Withdrawn EP2022944A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07014817A EP2022944A1 (fr) 2007-07-27 2007-07-27 Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07014817A EP2022944A1 (fr) 2007-07-27 2007-07-27 Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable

Publications (1)

Publication Number Publication Date
EP2022944A1 true EP2022944A1 (fr) 2009-02-11

Family

ID=39031356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07014817A Withdrawn EP2022944A1 (fr) 2007-07-27 2007-07-27 Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable

Country Status (1)

Country Link
EP (1) EP2022944A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102869890A (zh) * 2012-04-04 2013-01-09 弗拉斯季米尔·塞德拉切克 用固定索将叶片固定在叶片环中的方法
EP2700788A1 (fr) * 2012-08-21 2014-02-26 Alstom Technology Ltd Aube de stator ou de rotor avec capuchon d'extrémité
WO2014143286A1 (fr) 2013-03-15 2014-09-18 United Technologies Corporation Lubrification de pales de soufflante
EP2818638A1 (fr) * 2013-06-27 2014-12-31 MTU Aero Engines GmbH Assemblage aubes-disque, procédé et turbomachine
EP2886799A1 (fr) * 2013-12-20 2015-06-24 Siemens Aktiengesellschaft Couronne d'aubes de turbomachine et procédé de montage des aubes d'une couronne d'aubes de turbomachine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE829685C (de) * 1945-03-17 1952-01-28 Bayerische Motoren Werke Ag Befestigung der Schaufeln in der Radscheibe, insbesondere von Abgasturbinen
FR1484321A (fr) * 1966-06-22 1967-06-09 Ass Elect Ind Perfectionnements apportés aux rotors de turbines à vapeur
DE2822627A1 (de) * 1978-05-24 1979-11-29 Volkswagenwerk Ag Ceranox-verbindung und verfahren zu ihrer herstellung
US4790723A (en) * 1987-01-12 1988-12-13 Westinghouse Electric Corp. Process for securing a turbine blade
US5087174A (en) * 1990-01-22 1992-02-11 Westinghouse Electric Corp. Temperature activated expanding mineral shim
DE4314160A1 (de) * 1992-05-13 1993-11-18 Siemens Ag Fügeverbindung und Verfahren zu ihrer Herstellung
US5372481A (en) * 1993-11-29 1994-12-13 Solar Turbine Incorporated Ceramic blade attachment system
GB2298680A (en) * 1995-03-06 1996-09-11 Mtu Muenchen Gmbh Stator vane seal support

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE829685C (de) * 1945-03-17 1952-01-28 Bayerische Motoren Werke Ag Befestigung der Schaufeln in der Radscheibe, insbesondere von Abgasturbinen
FR1484321A (fr) * 1966-06-22 1967-06-09 Ass Elect Ind Perfectionnements apportés aux rotors de turbines à vapeur
DE2822627A1 (de) * 1978-05-24 1979-11-29 Volkswagenwerk Ag Ceranox-verbindung und verfahren zu ihrer herstellung
US4790723A (en) * 1987-01-12 1988-12-13 Westinghouse Electric Corp. Process for securing a turbine blade
US5087174A (en) * 1990-01-22 1992-02-11 Westinghouse Electric Corp. Temperature activated expanding mineral shim
DE4314160A1 (de) * 1992-05-13 1993-11-18 Siemens Ag Fügeverbindung und Verfahren zu ihrer Herstellung
US5372481A (en) * 1993-11-29 1994-12-13 Solar Turbine Incorporated Ceramic blade attachment system
GB2298680A (en) * 1995-03-06 1996-09-11 Mtu Muenchen Gmbh Stator vane seal support

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102869890A (zh) * 2012-04-04 2013-01-09 弗拉斯季米尔·塞德拉切克 用固定索将叶片固定在叶片环中的方法
EP2700788A1 (fr) * 2012-08-21 2014-02-26 Alstom Technology Ltd Aube de stator ou de rotor avec capuchon d'extrémité
WO2014143286A1 (fr) 2013-03-15 2014-09-18 United Technologies Corporation Lubrification de pales de soufflante
EP2971661A4 (fr) * 2013-03-15 2016-09-28 United Technologies Corp Lubrification de pales de soufflante
US9958113B2 (en) 2013-03-15 2018-05-01 United Technologies Corporation Fan blade lubrication
EP2818638A1 (fr) * 2013-06-27 2014-12-31 MTU Aero Engines GmbH Assemblage aubes-disque, procédé et turbomachine
EP2886799A1 (fr) * 2013-12-20 2015-06-24 Siemens Aktiengesellschaft Couronne d'aubes de turbomachine et procédé de montage des aubes d'une couronne d'aubes de turbomachine

Similar Documents

Publication Publication Date Title
DE10340773A1 (de) Rotor einer Dampf- oder Gasturbine
EP1398499A1 (fr) Fixation des aubes sur le moyeu d'éolienne
DE102007027465A1 (de) Gasturbinenschaufel mit modularem Aufbau
EP2022944A1 (fr) Fixation d'aube dans une rainure circonférentielle au moyen d'une masse céramique durcissable
WO2016116285A1 (fr) Fixation d'aube avec dispositif de blocage pour aubes de turbine
EP1995413B1 (fr) Joint d'étanchéité pour le jeu d'aubes d'une turbomachine
WO2005056983A1 (fr) Rotor a renfort de fibres pour turbogenerateur
CH703775A2 (de) Schaufelanordnung für einen Rotor.
EP2646656B1 (fr) Moyen d'amortissement pour amortir le mouvement d'une aube d'une turbomachine
DE19654471B4 (de) Rotor einer Strömungsmaschine
EP2394028B1 (fr) Dispositif d'étanchéité sur l'arbre à aubes d'un étage de rotor d'une turbomachine axiale et son utilisation
EP3657012B1 (fr) Boulons de centrage destinés à la fabrication d'un raccordement à bride entre deux composants d'une éolienne, procédé de fabrication d'un raccordement à bride ainsi que raccordement à bride
EP1698759B1 (fr) Fermeture de rotor
DE102005000709A1 (de) Regelstufe verringerten Gewichts einer Hochtemperaturdampfturbine
EP2436878A2 (fr) Boulons de couplage pour aubes de turbines
EP1355041A2 (fr) Aube de turbine
EP3536913A1 (fr) Bague intérieure pour une turbomachine et procédé de fabrication de cette bague intérieure
DE102013225572A1 (de) Seilsicherung für Strömungsmaschinen
EP2886799A1 (fr) Couronne d'aubes de turbomachine et procédé de montage des aubes d'une couronne d'aubes de turbomachine
DE10310431A1 (de) Rotor-Schluss
EP3064705B1 (fr) Rotor doté d'une tôle de sûreté destiné à protéger un verrouillage rotatif contre le dévissage
DD155445A1 (de) Axialsicherung von bolzen bei axialen stroemungsmaschinen mit steckfuss-laufschaufeln
EP3971415B1 (fr) Procédé d'essai d'un composant d'une pale de rotor pour une éolienne et composant de pale de rotor
EP2884052B1 (fr) Rotor pour une turbomachine avec bague d'écoulement fermée profilée et son procédé de fabrication
DE2312821A1 (de) Befestigung der laufschaufeln von kreiselmaschinen, insbesondere fuer trommelartige verdichterlaeufer von gasturbinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090812

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566