EP2149404A1 - Procédé de traitement d'une surface d'une pale de turbine dans un espace creux de la pale de turbine et dispositif de traitement d'une surface d'un composant - Google Patents

Procédé de traitement d'une surface d'une pale de turbine dans un espace creux de la pale de turbine et dispositif de traitement d'une surface d'un composant Download PDF

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Publication number
EP2149404A1
EP2149404A1 EP08013546A EP08013546A EP2149404A1 EP 2149404 A1 EP2149404 A1 EP 2149404A1 EP 08013546 A EP08013546 A EP 08013546A EP 08013546 A EP08013546 A EP 08013546A EP 2149404 A1 EP2149404 A1 EP 2149404A1
Authority
EP
European Patent Office
Prior art keywords
cavity
component
turbine blade
mechanical
abrasives
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Withdrawn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
EP08013546A
Other languages
German (de)
English (en)
Inventor
Jens Birkner
Jan Dr. Steinbach
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 EP08013546A priority Critical patent/EP2149404A1/fr
Publication of EP2149404A1 publication Critical patent/EP2149404A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/002—Cleaning of turbomachines

Definitions

  • the invention relates to a method for treating a surface of a component, for example a turbine blade, in particular a surface in a cavity of the component, in which cleaning agent is introduced into the cavity.
  • the invention relates to a device for treating a surface of a component with a blasting chamber, a device for generating a negative pressure, with a device for applying mechanical abrasives and with a device for suction with abrasion contaminated mechanical abrasives.
  • the object of the invention is achieved by a method for treating a surface of a component, for example a turbine blade, according to claim 1 and an apparatus according to claim 11.
  • a method for treating a surface of a component for example a turbine blade, according to claim 1 and an apparatus according to claim 11.
  • the dependent claims contain advantageous embodiments of the invention.
  • cleaning agents are introduced into a cavity in which a surface of the component is present.
  • the method is characterized in that the cleaning agents are sucked through the cavity.
  • the cavity may in this case be in particular a cavity of the component.
  • the surface to be cleaned or decoated may in particular be an inner surface of the component.
  • the term "treating" a surface particularly includes cleaning a surface and / or stripping a surface of a component, in particular a turbine blade.
  • oxidic residues or layers and / or higher aluminum-containing residual layers of an original surface coating can be achieved and removed with exceptional reliability within a cavity of, for example, a turbine blade.
  • a subsequent crack cleaning process may subsequently be performed on the turbine blade.
  • the term “treating” thus describes a removal of material layers on cavity walls of a component.
  • Such a secondary crack cleaning process can be, for example, a hydrofluoric acid cleaning process or a fluoride ion cleaning process.
  • the component can be of various shapes.
  • it is a turbine blade, in particular a gas turbine blade, which preferably has at least one cavity through which cooling air can flow through the turbine blade, especially during operation.
  • cavity herein describes an inner region of a component which is at least partially enclosed by a component body and at least accessible through two access openings from the outside.
  • the cavity is enclosed by a shell, which is formed by an inner component surface. It is understood that the component, and in particular a turbine blade, may also have a plurality of such cavities.
  • cleaning agent covers any means or structures by means of which, in particular, a mechanical removal of undesirable surface layers can be achieved.
  • a chemical cleaning or stripping for example. With hydrochloric acid, take place. The process can also be repeated several times. Otherwise, blasting alone can take a relatively long time, possibly not uniformly cleaning or de-coating all parts of the component interior.
  • the cleaning agents sucked through for example, only oxide deposits on the inner surface should be removed at sufficiently many points so that the hydrochloric acid then has better access, for example, to an aluminum-rich coating, which is then chemically dissolved or etched away. As a result, the remaining oxide coatings are infiltrated and removed, since they now lack the primer.
  • the cleaning agents can be procedurally simply sucked into the cavity, if a vacuum or vacuum in and / or on the cavity of the turbine blade is generated for sucking the cleaning agent.
  • a suitable negative pressure or a suitable vacuum can also be provided structurally simply in and / or on the cavity.
  • the invention is also achieved by a device for treating a surface of a component with a device for generating a negative pressure, with a blasting chamber, a device for applying mechanical abrasives and with a device for suction with removal contaminated mechanical abrasives.
  • the component can be arranged in the blasting chamber between the device for applying the mechanical abrasive and the device for sucking off the abrasives contaminated with mechanical abrasives.
  • the component may, for example, be a turbine blade, in particular a gas turbine blade.
  • the component for example a turbine blade
  • the component is intrinsically a component of a vacuum cleaning circuit through which cleaning agents, such as mechanical abrasives, can be passed.
  • mechanical abrasive in the present case describes solid particles which can be moved by means of a carrier medium. A cleaning effect can then be additionally improved by means of swirling in the carrier medium Abrasive.
  • the abrasive contaminated with abrasion can be advantageously collected when the detergent is sucked through the cavity of the component into a vacuum chamber.
  • the component may have at least one coolant inlet opening and at least one coolant outlet opening, and the surface of the component to be treated may be located in the cavity.
  • the component can be arranged in the blasting chamber in such a way that the device for dispensing the mechanical abrasive and the device for extracting the abrasive abrasives contaminated with abrasion are pneumatically connected to one another via the cavity.
  • the structure described above can be realized when the means for applying the mechanical Abrasive and / or the means for sucking the abraded contaminated mechanical abrasives can be sealed with a coolant inlet opening and / or a coolant outlet opening of the component.
  • the device for applying the mechanical abrasive can be fluidically connected to the interior of the blasting chamber and the device for sucking off the abrasive abrasives contaminated with mechanical abrasives can be connected to a coolant inlet opening or a coolant outlet opening.
  • the device for dispensing the mechanical abrasive can also be sealedly connected to a coolant inlet opening or a coolant outlet opening, and the device for sucking off the abrasives contaminated with mechanical abrasives can be fluidically connected to the interior of the blasting chamber.
  • a sealed connection can be realized by means of a suitable nozzle, which can be placed in front of or in an access opening.
  • the cleaning agents can be of various shapes.
  • the detergents are applied as mechanical abrasives within the cavity to the surface and / or along the surface accelerates the component, whereby a particularly uniform mechanical abrasion of cavity walls of the component can be achieved.
  • the cleaning agents in particular the mechanical abrasives, can be accelerated onto the surface within the component cavity with a particularly high kinetic energy if the cleaning agents are introduced into the cavity of the component by means of a gaseous carrier medium.
  • the mechanical abrasive by means of the gaseous carrier medium can ideally reach the entire cavity of the component, such as a turbine blade, whereby a particularly effective cleaning of the inner surface is possible.
  • a significantly greater cleaning effect can be achieved than in conventional blasting processes, in which cleaning agents are introduced by means of compressed air from outside into the cavity.
  • abrasives are advantageously not accelerated by means of compressed air to a surface to be treated but by means of negative pressure on the corresponding surfaces.
  • a significantly greater cleaning effect can be achieved since a movement of the abrasive is not inhibited by a carrier liquid, whereby the abrasive in the present much easier and thus be swirled with a much higher kinetic energy can.
  • gaseous carrier medium various gases can be used. It is particularly cost-effective if air is used as the gaseous carrier medium.
  • a passing of the cleaning agents can take place procedurally and structurally simple, if the cleaning agents are introduced into the cavity through a coolant inlet opening of the component, for example a turbine blade, and out of the cavity through a coolant outlet opening of the component.
  • cleaning agents can be routed through a turbine blade in a procedurally and structurally simple manner if the cleaning agents are introduced into the cavity through a coolant outlet opening of the turbine blade and are guided out of the cavity through a coolant inlet opening of the turbine blade.
  • Figure 1 which is the sole figure, schematically shows a view of a device for blasting a surface of a gas turbine blade, in which the gas turbine blade is fluidly disposed between a device for applying mechanical abrasive and a device for sucking the Abrasion contaminated Abrasive.
  • the device 1 shown in the figure essentially comprises a device 2 for generating a negative pressure 3, a device 4 for applying mechanical abrasives 5, short application device 4, a device 6 for sucking the abrasive (not shown here) contaminated mechanical abrasives 5, short suction device 6, and a device 7 for storing the mechanical abrasive. 5
  • a blasting chamber 19 in which a gas turbine blade 8 with a cavity 9 can be arranged.
  • the suction device 6 is pneumatically connected to the dispensing device 4 via the cavity 9 of the gas turbine blade 8 at a arranged in the blasting chamber gas turbine blade 8.
  • the suction device 6 in the present embodiment with the interior of the blasting chamber 19 and thus indirectly with coolant outlet openings 11 of the cavity 9 fluidly connected.
  • the application device is fluidically sealed with a coolant inlet opening 10 of the gas turbine blade 8 connectable, ie connected so that the junction is sealed against the interior of the blasting chamber 19 so far that a sufficient proportion of abrasives 5 is sucked through the cavity 9 of the gas turbine blade 8 and the mechanical abrasives 5 in the sense of Detergents 12 can be passed through the cavity 9 of the gas turbine blade 8 by means of a gaseous carrier medium 13.
  • the gas turbine blade 8 is shown after the application device 4 has been fluidically sealed connected to the coolant inlet opening 10 of the gas turbine blade 8.
  • the application device can also be sealedly connected to the coolant outlet openings 11 of the gas turbine blade 8.
  • the gaseous carrier medium 13 is sucked in at a suitable air supply device 14 as air 15 from the environment 16.
  • the discharge device 4 may be fluidically connected to the interior of the blasting chamber 19 and the suction device 6 sealed to the coolant outlet opening 10 or the coolant outlet openings 11 of the cavity.
  • the stated embodiments not only allow the cleaning of the inner surface by means of the abrasive 5, but also the cleaning of the outer surface of the gas turbine blade 8.
  • the proportion of abrasives 5, which pass through the cavity 9 of the gas turbine blade 8 depends on the degree of the above-mentioned seal from. If only the inner surface of the gas turbine blade 8 is to be cleaned, a high degree of sealing can be selected.
  • the device 2 for generating a negative pressure 3 is thus at least indirectly pneumatically connectable to a cavity access opening 10 and 11, respectively.
  • abrasive cleaning or stripping After completion of the abrasive cleaning or stripping, optional dry cleaning or stripping can follow.
  • the process of abrasive cleaning or stripping and subsequent chemical cleaning or stripping can also be carried out repeatedly as part of a cleaning or stripping process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP08013546A 2008-07-28 2008-07-28 Procédé de traitement d'une surface d'une pale de turbine dans un espace creux de la pale de turbine et dispositif de traitement d'une surface d'un composant Withdrawn EP2149404A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08013546A EP2149404A1 (fr) 2008-07-28 2008-07-28 Procédé de traitement d'une surface d'une pale de turbine dans un espace creux de la pale de turbine et dispositif de traitement d'une surface d'un composant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08013546A EP2149404A1 (fr) 2008-07-28 2008-07-28 Procédé de traitement d'une surface d'une pale de turbine dans un espace creux de la pale de turbine et dispositif de traitement d'une surface d'un composant

Publications (1)

Publication Number Publication Date
EP2149404A1 true EP2149404A1 (fr) 2010-02-03

Family

ID=40219982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08013546A Withdrawn EP2149404A1 (fr) 2008-07-28 2008-07-28 Procédé de traitement d'une surface d'une pale de turbine dans un espace creux de la pale de turbine et dispositif de traitement d'une surface d'un composant

Country Status (1)

Country Link
EP (1) EP2149404A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101286A1 (it) * 2010-07-13 2012-01-14 Ansaldo Energia Spa Dispositivo e metodo per la pulizia di una pala di una turbina a gas
ITMI20101709A1 (it) * 2010-09-20 2012-03-21 Tecno S P A Fa Dispositivo di lavaggio pezzi dotati di almeno un condotto presentante un'estremita' sulla base del pezzo e un'altra sulla superficie del pezzo

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339845A (en) * 1993-07-26 1994-08-23 Fuel Systems Textron, Inc. Cleaning apparatus and method for fuel and other passages
DE4441401A1 (de) * 1994-11-10 1996-05-15 Bandelin Electronic Gmbh & Co Vorrichtung zur Reinigung ärztlicher Instrumente
DE19832767A1 (de) * 1998-07-22 2000-01-27 Siemens Ag Vorrichtung sowie Verfahren zur Reinigung eines hohlen Bauteils einer Strömungsmaschine
US20020139399A1 (en) * 2000-07-24 2002-10-03 Kiyomi Kanda Method and apparatus for cleaning drainpipes in movable equipment
US20070068551A1 (en) * 2005-09-29 2007-03-29 Garimella Balaji R Squirter jet ultrasonic cleaning

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339845A (en) * 1993-07-26 1994-08-23 Fuel Systems Textron, Inc. Cleaning apparatus and method for fuel and other passages
DE4441401A1 (de) * 1994-11-10 1996-05-15 Bandelin Electronic Gmbh & Co Vorrichtung zur Reinigung ärztlicher Instrumente
DE19832767A1 (de) * 1998-07-22 2000-01-27 Siemens Ag Vorrichtung sowie Verfahren zur Reinigung eines hohlen Bauteils einer Strömungsmaschine
US20020139399A1 (en) * 2000-07-24 2002-10-03 Kiyomi Kanda Method and apparatus for cleaning drainpipes in movable equipment
US20070068551A1 (en) * 2005-09-29 2007-03-29 Garimella Balaji R Squirter jet ultrasonic cleaning

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101286A1 (it) * 2010-07-13 2012-01-14 Ansaldo Energia Spa Dispositivo e metodo per la pulizia di una pala di una turbina a gas
EP2407254A1 (fr) * 2010-07-13 2012-01-18 Ansaldo Energia S.p.A. Dispositif et procédé de nettoyage d'une pale de turbine à gaz
ITMI20101709A1 (it) * 2010-09-20 2012-03-21 Tecno S P A Fa Dispositivo di lavaggio pezzi dotati di almeno un condotto presentante un'estremita' sulla base del pezzo e un'altra sulla superficie del pezzo

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