EP2431572A1 - Revêtement de barrière thermique pour un élément de turbine à vapeur - Google Patents

Revêtement de barrière thermique pour un élément de turbine à vapeur Download PDF

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Publication number
EP2431572A1
EP2431572A1 EP10177861A EP10177861A EP2431572A1 EP 2431572 A1 EP2431572 A1 EP 2431572A1 EP 10177861 A EP10177861 A EP 10177861A EP 10177861 A EP10177861 A EP 10177861A EP 2431572 A1 EP2431572 A1 EP 2431572A1
Authority
EP
European Patent Office
Prior art keywords
steam turbine
turbine component
layer
grooves
thermal insulation
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Withdrawn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
EP10177861A
Other languages
German (de)
English (en)
Inventor
Fabian Bergeron
Christian Böhme
Thorsten Rudolf
Jörg SCHÜRHOFF
Ulrich Setzer
Stefan Swoboda
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 EP10177861A priority Critical patent/EP2431572A1/fr
Publication of EP2431572A1 publication Critical patent/EP2431572A1/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Withdrawn legal-status Critical Current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
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/284—Selection of ceramic materials
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • 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
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • 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
    • F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
    • 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
    • F05D2230/90—Coating; Surface treatment
    • 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
    • F05D2250/10—Two-dimensional
    • F05D2250/12—Two-dimensional rectangular
    • F05D2250/121—Two-dimensional rectangular square
    • 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
    • F05D2250/10—Two-dimensional
    • F05D2250/18—Two-dimensional patterned
    • F05D2250/184—Two-dimensional patterned sinusoidal
    • 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
    • F05D2250/29—Three-dimensional machined; miscellaneous
    • F05D2250/294—Three-dimensional machined; miscellaneous grooved
    • 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
    • F05D2250/60—Structure; Surface texture
    • F05D2250/61—Structure; Surface texture corrugated
    • F05D2250/611—Structure; Surface texture corrugated undulated

Definitions

  • a steam turbine component in particular a housing component of a steam turbine, has the function to guide the steam along a turbine rotor and to hold a Leitbeschaufelung.
  • the steam turbine component such as an inner casing of the steam turbine, is exposed to high thermal stresses by direct contact with a process steam at a temperature of several hundred degrees. Due to the temperature difference of sometimes well above 100 ° C between the inside and the outside of the inner housing, there is a high thermal load on the inner housing.
  • the inner housing in particular in areas of a low-pressure steam turbine exposed to wet steam, is exposed to high mechanical loads due to high flow velocities in interaction with particle impacts, for example of condensed water droplets, on a surface of the inner housing.
  • the invention has for its object to provide a thermal insulation layer for a steam turbine component, in which the above-mentioned problems are overcome and in particular the steam turbine component is protected from high temperature gradients.
  • the object is achieved according to the invention with a thermal insulation layer for a steam turbine component according to claim 1. Furthermore, the object is achieved with a method for spraying the thermal insulation layer for the steam turbine component according to claim 9.
  • Advantageous developments of the invention are described in the dependent claims.
  • thermal insulation layer for the steam turbine component having a base layer of a porous material and a bottom surface adhering the base layer to a surface of the steam turbine component
  • grooves are formed on the underside in the base layer such that a plurality of tiling of the grooves is formed on the grooves porous material are formed, which are dimensioned in size and shape such that a thermal expansion of the steam turbine component is compensated by elastic deformation of the porous material.
  • the underside of the base layer of the thermal insulation layer according to the invention is formed segmented by the bottom of the plurality of grooves is provided which form the tiles of the porous material from which the base layer is formed, wherein the grooves surround the individual tiles.
  • the base layer is adhered to the surface of the steam turbine component with the tiles facing the surface of the steam turbine component and the grooves being quasi closed off from the surface of the steam turbine component.
  • the tiles are limited in their size and shape by the grooves encircling them, so that each individual tile can compensate for thermal expansion of the surface of the steam turbine component covered by it during operation of an associated steam turbine by means of elastic deformation without, for example, raking it off.
  • the base layer of the porous material is formed according to the invention, which has a corresponding elasticity due to its porosity. To avoid stress peaks within the tiles, these are preferably rounded at their corners.
  • the longitudinal extent of the grooves is preferably formed wavy.
  • the tiles of the thermal insulation layer are preferably substantially square.
  • the surface of the steam turbine component is covered with the thermal insulation layer according to the invention.
  • the grooves are of course narrow in cross-section, whereby the material weakening of the base layer by the grooves is low.
  • the thermal insulation effect of the base layer is only slightly affected by the grooves.
  • the steam turbine component is thus thermally insulated on its entire surface, whereby the steam turbine component is protected from high temperature gradients.
  • the base layer of the thermal insulation layer is preferably formed of a first layer package and a second layer package and the steam turbine component facing first layer package is completely penetrated by the grooves, wherein the groove bottom of the grooves is formed by the second layer package. Forming the base layer by the two Layer packages make it possible to form the grooves in the base layer in a time-saving and cost-effective manner.
  • the layer packages of the thermal insulation layer furthermore preferably have a plurality of layers.
  • a protective layer is preferably attached, whereby the base layer is advantageously protected from mechanical stress.
  • This mechanical stress arises in particular through an interaction of high flow velocities of steam along the steam turbine component in the order of several 100 m / s and a particle load of the steam. These particles are in particular condensed water droplets, which are thrown to the surface of the coated steam turbine component with the high flow rate of the steam.
  • the protective layer formed in accordance with the loads erosion wear of the base layer due to particle impacts is prevented.
  • the porous material of the thermal insulation layer is preferably ceramic.
  • the method according to the invention for spraying a thermal insulation layer onto a steam turbine component comprises the step of: spraying the material onto the surface of the steam turbine component to form the base layer such that the material becomes porous and the grooves forming the tiles from the base layer are formed on the underside of the base layer form porous material.
  • the spraying is carried out with a special leadership of a spray gun with regard to a feed of the spray gun and a filling of the same with a sprayed.
  • the method according to the invention is carried out without an additional expenditure of material, such as, for example, attaching a network between a spray jet of the spray gun and the surface of the steam turbine component, whereby the method is extremely simple to use and, moreover, inexpensive.
  • spraying the material onto the steam turbine component comprises the steps of: spraying the material onto the surface of the steam turbine component to form the first layer package, wherein the first layer package is adhered directly to the surface of the steam turbine component and fully penetrated by the grooves; such that the first layer packet has the tiles; Spraying the material onto the first layer package to form the second layer package such that the groove bottom of the grooves is formed by the second layer package.
  • a preferred method comprises the step of: producing the protective layer on the side of the base layer facing away from the steam turbine component.
  • thermal insulation layer 1 which has a base layer 5 made of a porous material, for example ceramic, with a bottom 11.
  • the thermal insulation layer 1 is adhered to the underside 11 of the base layer 5 on a surface 6 of a steam turbine component 7.
  • the base layer 5 has a first layer package 8 and a second layer package 9 as well as a protective layer 10 which is mounted on an upper side 12 of the base layer 5 facing away from the underside 11.
  • the protective layer 10 is such consistently designed to withstand a high flow rate of process steam on the order of 100 m / s passing through an associated steam turbine (not shown), thus protecting the porous layer packages 8, 9 beneath it from abrasion or erosion wear.
  • the process steam may carry particles, for example, water droplets. Due to the high flow rate of the process steam, the entrained particles can exert a large impulse on a struck area of the thermal insulation layer 1 and thereby damage this. Therefore, the protective layer 10 is also made resistant to particle impact.
  • a network of grooves 2 is formed, which intersect at points of intersection 3 ( Fig. 1 ).
  • the grooves 2 form tiles 4 of the porous material, whereby the tiles 4 are surrounded by the grooves 2.
  • the tiles 4 are rounded at their corners to avoid stress peaks in the tiles 7 due to a too large notch effect at the corners.
  • the longitudinal extent of the grooves 2 is wavy, whereby the effective cross-section of the grooves 2 does not increase as much as the change in length of the steam turbine component 7 due to the thermal expansion at a thermal expansion of the steam turbine component 7 and the resulting divergence of the grooves 2.
  • the tiles 4 are formed substantially square, whereby the surface 6 of the steam turbine component 7 is covered with the thermal insulation layer 1 according to the invention with an arrangement tile 4 to tile 4 to form the interposed grooves 2.
  • the grooves are narrow in cross-section, whereby the material weakening of the base layer 5 through the grooves 2 is low.
  • the thermal insulation effect of the base layer 5 is therefore only slightly affected by the grooves 2.
  • the steam turbine component 7 is thus thermally insulated on its entire surface 6, whereby the steam turbine component 7 is protected from high temperature gradients.
  • Fig. 2 a cross section through the thermal insulation layer 1 according to the invention is shown, which is adhered to the surface 6 of the steam turbine component 7.
  • the surface 6 of the steam turbine component 7 is thus not contacted by the process steam during operation of the steam turbine (not shown), whereby according to the invention a high temperature gradient in the steam turbine component 7 is avoided.
  • the base layer 5 is formed from two layer packages 8, 9, wherein the steam turbine component 7 facing layer package 8 is completely penetrated by the grooves 2 and the groove bottom of the grooves 2 is formed by the second layer package 9.
  • the individual layer packages 8, 9 are each formed from a plurality of layers (not shown).
  • the layers were sprayed on one after the other by means of a special guide of a spray gun with regard to an advance of the spray gun and a filling of the same with a sprayed material.
  • the method according to the invention used for this purpose is carried out without an additional expenditure of material, such as, for example, attaching a network between a spray jet of the spray gun and the surface 6 of the steam turbine component 7.
  • the base layer 5 is thus extremely easy and inexpensive adhered to the surface 6.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP10177861A 2010-09-21 2010-09-21 Revêtement de barrière thermique pour un élément de turbine à vapeur Withdrawn EP2431572A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10177861A EP2431572A1 (fr) 2010-09-21 2010-09-21 Revêtement de barrière thermique pour un élément de turbine à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10177861A EP2431572A1 (fr) 2010-09-21 2010-09-21 Revêtement de barrière thermique pour un élément de turbine à vapeur

Publications (1)

Publication Number Publication Date
EP2431572A1 true EP2431572A1 (fr) 2012-03-21

Family

ID=43587641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10177861A Withdrawn EP2431572A1 (fr) 2010-09-21 2010-09-21 Revêtement de barrière thermique pour un élément de turbine à vapeur

Country Status (1)

Country Link
EP (1) EP2431572A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5350599A (en) * 1992-10-27 1994-09-27 General Electric Company Erosion-resistant thermal barrier coating
US5438806A (en) * 1993-12-13 1995-08-08 Reinhall; Per Composition for vibration damping
US5681616A (en) * 1994-12-28 1997-10-28 General Electric Company Thick thermal barrier coating having grooves for enhanced strain tolerance
US20020141872A1 (en) * 2001-03-27 2002-10-03 Ramgopal Darolia Process for forming micro cooling channels inside a thermal barrier coating system without masking material
WO2003010419A1 (fr) * 2001-07-23 2003-02-06 Alstom Technology Ltd Dispositif pour reduire la fente d'etancheite entre composant mobile et composant stationnaire a l'interieur d'une turbomachine
EP1462613A1 (fr) * 2003-03-26 2004-09-29 Siemens Aktiengesellschaft Revêtement refroidissable
EP1645655A1 (fr) * 2004-10-05 2006-04-12 Siemens Aktiengesellschaft Substrat revêtu et procédé de revêtement
EP1970461A1 (fr) * 2007-03-14 2008-09-17 Siemens Aktiengesellschaft Pièce de turbine dotée d'une couche d'isolation thermique
EP2233450A1 (fr) * 2009-03-27 2010-09-29 Alstom Technology Ltd Système de protection thermique multicouches et utilisation d' un tel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5350599A (en) * 1992-10-27 1994-09-27 General Electric Company Erosion-resistant thermal barrier coating
US5438806A (en) * 1993-12-13 1995-08-08 Reinhall; Per Composition for vibration damping
US5681616A (en) * 1994-12-28 1997-10-28 General Electric Company Thick thermal barrier coating having grooves for enhanced strain tolerance
US20020141872A1 (en) * 2001-03-27 2002-10-03 Ramgopal Darolia Process for forming micro cooling channels inside a thermal barrier coating system without masking material
WO2003010419A1 (fr) * 2001-07-23 2003-02-06 Alstom Technology Ltd Dispositif pour reduire la fente d'etancheite entre composant mobile et composant stationnaire a l'interieur d'une turbomachine
EP1462613A1 (fr) * 2003-03-26 2004-09-29 Siemens Aktiengesellschaft Revêtement refroidissable
EP1645655A1 (fr) * 2004-10-05 2006-04-12 Siemens Aktiengesellschaft Substrat revêtu et procédé de revêtement
EP1970461A1 (fr) * 2007-03-14 2008-09-17 Siemens Aktiengesellschaft Pièce de turbine dotée d'une couche d'isolation thermique
EP2233450A1 (fr) * 2009-03-27 2010-09-29 Alstom Technology Ltd Système de protection thermique multicouches et utilisation d' un tel

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