EP3184180B1 - Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen - Google Patents

Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen Download PDF

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Publication number
EP3184180B1
EP3184180B1 EP16204712.0A EP16204712A EP3184180B1 EP 3184180 B1 EP3184180 B1 EP 3184180B1 EP 16204712 A EP16204712 A EP 16204712A EP 3184180 B1 EP3184180 B1 EP 3184180B1
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EP
European Patent Office
Prior art keywords
erosion coating
component
substrate
recited
layer
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.)
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Application number
EP16204712.0A
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English (en)
French (fr)
Other versions
EP3184180A1 (de
Inventor
William Bogue
Dorel M. Moisei
Bruce R. SAXTON
John D. Riehl
Xiaomei Fang
William J. Brindley
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.)
RTX Corp
Original Assignee
United Technologies Corp
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Publication date
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Publication of EP3184180A1 publication Critical patent/EP3184180A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/005—Repairing damaged coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • 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
    • F01D5/005—Repairing methods or devices
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/80—Repairing, retrofitting or upgrading methods

Definitions

  • the present disclosure relates generally to a remanufactures process and, more particularly, to a repair process for aluminum fan blades.
  • Gas turbine engines such as those that power modern commercial and military aircraft, generally include a fan section, a compressor section to pressurize an airflow, a combustor section to burn a hydrocarbon fuel in the presence of the pressurized air, and a turbine section to extract energy from the resultant combustion gases.
  • the fan section often includes aluminum fan blades designed with a multi-layer polyurethane erosion coating to protect both sides of the airfoil from operational erosion and subsequent corrosion.
  • the erosion coatings sustain erosion, FOD and local damage in service, but there is only minimal repair capability for these coatings.
  • a method according to one aspect of the present invention is defined in claim 1.
  • a corresponding component with a local repair to a multi-layered polyurethane erosion coating according to another aspect of the present invention is defined in claim 5.
  • Preferred embodiments are referred to in the dependent claims.
  • Figure 1 schematically illustrates a general perspective view of an exemplary component 20, e.g., a fan blade with a multi-layer erosion coating system for a gas turbine engine.
  • a component 20 e.g., a fan blade with a multi-layer erosion coating system for a gas turbine engine.
  • FIG. 1 schematically illustrates a general perspective view of an exemplary component 20, e.g., a fan blade with a multi-layer erosion coating system for a gas turbine engine.
  • a component type is illustrated in the disclosed non-limiting embodiment, other components with a multi-layer erosion coating system such as a part in the airstream of the engine with an erosion resistant coating, more specifically an airfoil, and even more specifically, a guide vane or a fan blade will also benefit herefrom.
  • a cross-section of the component 20 is illustrated for an aluminum substrate 30 such as a 2000, 6000, or 7000 series aluminum with a multi-layer coating 35.
  • the coating 35 includes a phosphoric acid anodize layer 40, a corrosion inhibiting epoxy bond primer 50, a corrosion inhibiting paint primer 60, and an elastomeric erosion coating 70 such as a urethane or fluoroelastomer as the outer layer. It should be appreciated that various materials may be utilized in accords with this layer structure.
  • a local repair 100 for the component 20 is performed on an airflow surface. That is, the local repair of damage is performed in response to damage into the erosion coating system 35 and as deep as the aluminum substrate 30.
  • the local repair 100 may be initiated by abrading thru some or all layers in the erosion coating system and may be as deep as the aluminum substrate 30 or for damage that has reached down to the aluminum substrate 30.
  • the erosion coating system adjacent to the damage may be abraded, feathered or otherwise prepared and cleaned with, for example aluminum oxide and an acetone wipe to provide for adhesion of the repair coating system .
  • the corrosion inhibiting paint primer 60 provides corrosion protection to the aluminum substrate 30 and also facilitates receipt of a filled epoxy paste 200 such as Duralco 4525 manufactured by Cotronics Corp., of Brooklyn NY USA. It is recognized that for other composite or metallic substrates, the paint primer may not need to provide corrosion protection to the substrate and the use of the primer layer may be optional or a non-corrosion inhibiting primer may be utilized.
  • the epoxy paste provides for relatively faster thickness build rates than elastomeric coating material options facilitating faster overall repair process times.
  • the filled epoxy paste 200 may then be sanded or otherwise finished to provide an acceptable flowpath surface.
  • the filled epoxy paste 200 facilitates field repairs, provides erosion protection and protects primer layers within the repair coating system.

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (10)

  1. Verfahren zur lokalen Reparatur eines beschädigten Bereichs eines mehrschichtigen Polyurethan-Erosionsbeschichtungssystems auf einer Schaufelprofiloberfläche einer Gebläselaufschaufel, umfassend:
    Vorbereiten der Erosionsbeschichtung angrenzend an die Beschädigung durch Abreiben und/oder Verschleifen; und Reinigen der Erosionsbeschichtung angrenzend an die Beschädigung;
    Aufbringen einer Anstrichgrundierung auf ein Substrat in dem beschädigten Bereich; und
    Aufbringen einer gefüllten Epoxidpaste auf die Anstrichgrundierung in dem beschädigten Bereich.
  2. Verfahren nach Anspruch 1, wobei das Vorbereiten des Erosionsbeschichtungssystems angrenzend an den beschädigten Bereich das Abreiben der Erosionsbeschichtung bis hin zum Substrat umfasst, wobei das Substrat für das Erosionsbeschichtungssystem ein Aluminiumsubstrat ist.
  3. Verfahren nach Anspruch 1, wobei das Vorbereiten des mehrschichtigen Polyurethan-Erosionsbeschichtungssystems angrenzend an den beschädigten Bereich das Verschleifen der Erosionsbeschichtung in die Schaufelprofiloberfläche angrenzend an den beschädigten Bereich umfasst.
  4. Verfahren nach Anspruch 1, wobei das Substrat für das Erosionsbeschichtungssystem ein Aluminiumsubstrat ist und die mehrschichtige Polyurethan-Erosionsbeschichtung auf dem Substrat eine Phosphorsäure-Anodisierschicht, eine korrosionshemmende Epoxidhaftgrundierung, eine korrosionshemmende Anstrichgrundierung und eine elastomere Erosionsbeschichtung als Außenschicht umfasst.
  5. Komponente mit einer lokalen Reparatur einer mehrschichtigen Polyurethan-Erosionsbeschichtung, umfassend:
    einen lokalen Bereich mit fehlender mehrschichtiger Polyurethan-Erosionsbeschichtung, wobei der lokale Bereich mit einer gefüllten Epoxidpaste über einem Substrat, das eine Schaufelprofiloberfläche bildet, gefüllt ist, und ferner eine Anstrichgrundierung zwischen der gefüllten Epoxidpaste und dem Substrat umfassend.
  6. Komponente nach Anspruch 5, wobei das Substrat für das Erosionsbeschichtungssystem ein Aluminiumsubstrat ist und die mehrschichtige Polyurethan-Erosionsbeschichtung eine Phosphorsäure-Anodisierschicht, eine korrosionshemmende Epoxidhaftgrundierung, eine korrosionshemmende Anstrichgrundierung und eine elastomere Erosionsbeschichtung umfasst, wobei die elastomere Erosionsbeschichtung als Außenschicht fungiert.
  7. Komponente nach einem der Ansprüche 5-6, wobei die Komponente eine Gasturbinentriebwerkskomponente ist.
  8. Komponente nach Anspruch 7, wobei die Komponente ein Teil im Luftstrom des Triebwerks ist.
  9. Komponente nach einem der Ansprüche 5 bis 8, wobei die Komponente ein Schaufelprofil ist.
  10. Komponente nach einem der Ansprüche 5 bis 9, wobei die Komponente eine Leitschaufel oder eine Gebläuselaufschaufel ist.
EP16204712.0A 2015-12-24 2016-12-16 Lokale reparatur oder wiederaufarbeitung von polymer-erosionsbeschichtungen Active EP3184180B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201562387453P 2015-12-24 2015-12-24

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EP3184180A1 EP3184180A1 (de) 2017-06-28
EP3184180B1 true EP3184180B1 (de) 2020-06-10

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11260421B2 (en) * 2017-07-21 2022-03-01 Raytheon Technologies Corporation Method to strip and recoat erosion coatings applied to fan blades and structural guide vanes
US20190024256A1 (en) * 2017-07-21 2019-01-24 United Technologies Corporation Method to strip and recoat erosion coatings applied to fan blades and structural guide vanes
US10677068B2 (en) * 2018-01-18 2020-06-09 Raytheon Technologies Corporation Fan blade with filled pocket
US10828667B1 (en) * 2019-06-07 2020-11-10 United Technologies Corporation Removal of epoxies from metal substrates
US11274950B2 (en) 2019-06-17 2022-03-15 United Technologies Corporation Fabrication of high density sensor array

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6171704B1 (en) * 1995-12-29 2001-01-09 Sermatech International, Inc. Coating for aerospace aluminum parts
US7033673B2 (en) * 2003-07-25 2006-04-25 Analytical Services & Materials, Inc. Erosion-resistant silicone coatings for protection of fluid-handling parts
EP1753798B1 (de) * 2004-05-24 2021-01-27 Hontek Corporation Abriebfeste beschichtungen

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* Cited by examiner, † Cited by third party
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