EP0950797B1 - Verfahren zur Verminderung des Spiels zwischen Fluidzuleitung und Leitschaufelkammer eines Turboreaktors - Google Patents

Verfahren zur Verminderung des Spiels zwischen Fluidzuleitung und Leitschaufelkammer eines Turboreaktors Download PDF

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Publication number
EP0950797B1
EP0950797B1 EP99400783A EP99400783A EP0950797B1 EP 0950797 B1 EP0950797 B1 EP 0950797B1 EP 99400783 A EP99400783 A EP 99400783A EP 99400783 A EP99400783 A EP 99400783A EP 0950797 B1 EP0950797 B1 EP 0950797B1
Authority
EP
European Patent Office
Prior art keywords
vane cavity
guide vane
liner
clearance
brazing
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.)
Expired - Lifetime
Application number
EP99400783A
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English (en)
French (fr)
Other versions
EP0950797A1 (de
Inventor
Anne-Marie Arraitz
Eric Stéphan Bil
Michel Gérard Paul Hacault
Laurent Philippe Yves Leray
Michel Jean Loubet
Marc Roger Marchi
Jean Manuel Morcillo
Didier Marie Mortgat
Michel Jean-Pierre Pernot
Thierry Christian Sanz
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.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA Moteurs SA
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 SNECMA Moteurs SA filed Critical SNECMA Moteurs SA
Publication of EP0950797A1 publication Critical patent/EP0950797A1/de
Application granted granted Critical
Publication of EP0950797B1 publication Critical patent/EP0950797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like
    • F01D9/065—Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49318—Repairing or disassembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making

Definitions

  • the invention relates to the high turbine pressure of a turbomachine, such as that used on turbojets intended for the propulsion of aircraft. More specifically, it concerns the fixing of the shirt inside a dispenser the high pressure turbine and, in particular, the reduction of the play between this distributor and its shirt, lower platform level, to improve the tightness of the assembly.
  • the invention also relates to soldering partial or complete of metal parts.
  • FIG. 1 shows a partial section a turbojet engine on which the process is used according to the invention.
  • the chamber 1 followed by the high pressure turbine 2.
  • a series of rectifiers 3 fixed on the one hand to an upper sheet 5, placed between the hot runner and the cold runner, and, on the other hand, on a lower platform 6, separating the hot runner of an annular circulation pipe air 7.
  • the jacket 8 therefore allows free movement an air, or a cooling gas, on the part and other rectifiers 3, especially in the annular air circulation pipe 7 se located at the level of the lower platform 6.
  • Each distributor 3 is crossed by a pipe materialized by a jacket 8 opening into the air supply line 7.
  • This shirt is a component part of a cooling circuit of a part of the turbojet engine, in particular distributors and other bodies.
  • Figure 2 therefore shows, in a more detailed, the location of the folder 8, that is to say in the middle of the stiffener 3 which is inclined with respect to the direction of the air flow, so that straighten it downstream, towards the low turbine pressure.
  • the shirt 8 must be fixed in the stiffener 3. It is fixed in its part superior by brazing 9 at the level of the sheet superior 5. Taking into account the marked differences in temperatures prevailing during operation of the turbomachine, very large expansions occur occur on all metal parts. It is therefore necessary to leave a degree of freedom to the shirt 8 and not to attach it to its lower part at the level of the lower platform 6. Therefore, there is a clearance between the sleeve 8 and the stiffener 3 at the lower platform 6.
  • the object of the invention is therefore to remedy this drawback by trying to resolve this sealing problem at the bottom of the jacket 8 of a stiffener 3 of a high turbine pressure.
  • the main object of the invention is a method for reducing the existing play between a high pressure turbine distributor of a turbojet engine, at the level of the lower platform, and the shirt going through such a dispenser and in front be fixed inside the dispenser, at the upper sheet.
  • the reduction in clearance by brazing is made by reloading by diffusion brazing.
  • a bonding paste for superalloy comprising, among other things, an element of filler making it more fusible than superalloys.
  • Brazing ends with an operation consisting in passing the assembly in the oven so that the dough diffuse in the game between the shirt and the distributor.
  • the protective deposit is a non-stick ceramic deposit, of the zirconate type.
  • this protective deposit is that the subsequent soldering does not come to weld, or fix, the folder 8 to stiffener 3. It is recommended to use a non-stick ceramic type deposit of the type zirconate, or other equivalent product. We use, in particular, a product marketed under the name of NETCO 204 NS, by the SULZER Company.
  • the jacket 8 is then introduced into the hole 11 of rectifier 3 and is fixed at its level higher by brazing 9, as shown in the figure 2.
  • the reduction of the game, at the level of the platform lower 6, between the outer surface of the jacket 8 and the hole 11 of the rectifier 3 in which it is introduced, is done by brazing recharging broadcast (RBD).
  • brazing recharge diffusion is carried out by means of a paste which one apply around the bottom of the shirt 8, at the level of the soldering which it is desired to carry out. A heat treatment must then take place so that the paste melts and diffuses. The assembly thus assembled is then put in the oven for diffusion of the dough in the game that is to be filled. Brazing 10, thus represented in FIG. 2, is therefore produced without the jacket 8 is fixed at this level to the rectifier 3. The dough thus spreads in the game to be quenched by capillarity. We note that the laying of the dough is done preferably when mounting between platform 6 and the lower sheet.
  • diffusion brazing is a process which uses a paste comprising mainly a powder composed of the alloys or metals constituting both parties involved in soldering.
  • An additive is however added to this paste to make it more fuse. It is, in general, an additive to nickel base, in a content such as its liquidus temperature is lower than the temperature solidus of the alloys and metals constituting the base powder.
  • the metals generally making up these elements are nickel-based superalloys, or cobalt.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (5)

  1. Verfahren zur Verringerung des Spiels zwischen einer Leitschaufel (3) der Hochdruckturbine eines Turbotriebwerks im Bereich der unteren Plattform (6) und der Fluidzuleitung (8), die durch eine solche Leitschaufel (3) hindurch verläuft und in dieser Leitschaufel (3) im Bereich des oberen Blechs (5) befestigt werden muss,
       gekennzeichnet durch die folgenden einzelnen Phasen:
    Aufbringen einer Schutzschicht auf der Außenfläche des unteren Teils der Fluidzuleitung (8);
    Montage der Fluidzuleitung (8) in der Leitschaufel (3);
    Befestigung der Fluidzuleitung (8) in der Leitschaufel (3) im Bereich des oberen Teils; und
    Verringerung des Spiels durch Löten zwischen der Außenfläche des unteren Teils der Fluidzuleitung (8), die mit der Schutzschicht überzogen ist, und der Innenfläche der Leitschaufel (3) im Bereich der unteren Plattform (6).
  2. Verfahren nach Anspruch 1,
       dadurch gekennzeichnet,    dass die Verringerung des Spiels durch Löten durch Auftragen mit Diffusionslöten erfolgt.
  3. Verfahren nach Anspruch 2,
       dadurch gekennzeichnet,    dass das Auftragen durch Aufbringen einer Verbindungspaste für Superlegierungen erfolgt, die ein Zusatzelement enthält, das diese Paste schmelzbarer macht als die Superlegierungen, aus denen die Fluidzuleitung (8) und die Leitschaufel (3) bestehen.
  4. Verfahren nach Anspruch 2 oder 3,
       dadurch gekennzeichnet,    dass der Aufbau sodann einer Wärmebehandlung in einem Ofen unterzogen wird, damit die Paste in dem Spiel zwischen der Fluidzuleitung (8) und der Leitschaufel (3) diffundiert.
  5. Verfahren nach Anspruch 1,
       dadurch gekennzeichnet,    dass die Schutzschicht eine keramische Antihaftschicht des Typs Zirkonat ist.
EP99400783A 1998-04-09 1999-03-31 Verfahren zur Verminderung des Spiels zwischen Fluidzuleitung und Leitschaufelkammer eines Turboreaktors Expired - Lifetime EP0950797B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804423A FR2777318B1 (fr) 1998-04-09 1998-04-09 Procede de reduction du jeu existant entre une chemise et un distributeur de turbine d'un turboreacteur
FR9804423 1998-04-09

Publications (2)

Publication Number Publication Date
EP0950797A1 EP0950797A1 (de) 1999-10-20
EP0950797B1 true EP0950797B1 (de) 2004-05-26

Family

ID=9525041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400783A Expired - Lifetime EP0950797B1 (de) 1998-04-09 1999-03-31 Verfahren zur Verminderung des Spiels zwischen Fluidzuleitung und Leitschaufelkammer eines Turboreaktors

Country Status (6)

Country Link
US (1) US6163959A (de)
EP (1) EP0950797B1 (de)
JP (1) JP3848485B2 (de)
CA (1) CA2268402C (de)
DE (1) DE69917524T2 (de)
FR (1) FR2777318B1 (de)

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US7065955B2 (en) * 2003-06-18 2006-06-27 General Electric Company Methods and apparatus for injecting cleaning fluids into combustors
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Also Published As

Publication number Publication date
EP0950797A1 (de) 1999-10-20
CA2268402C (en) 2006-12-19
CA2268402A1 (en) 1999-10-09
DE69917524T2 (de) 2005-06-16
JPH11324796A (ja) 1999-11-26
US6163959A (en) 2000-12-26
FR2777318B1 (fr) 2000-05-12
JP3848485B2 (ja) 2006-11-22
FR2777318A1 (fr) 1999-10-15
DE69917524D1 (de) 2004-07-01

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