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
  • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
  • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
• • 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
  • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
  • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
  • F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
  • F01D11/122—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part with erodable or abradable material
• • 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
  • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
  • F01D21/003—Arrangements for testing or measuring
• • 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
  • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
  • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
  • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/08—Sealings
  • F04D29/16—Sealings between pressure and suction sides
  • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
  • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/52—Casings; Connections of working fluid for axial pumps
  • F04D29/54—Fluid-guiding means, e.g. diffusers
  • F04D29/541—Specially adapted for elastic fluid pumps
  • F04D29/542—Bladed diffusers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
  • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
• • 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
• • 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
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
  • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
  • F05D2230/237—Brazing
• • 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
  • F05D2230/20—Manufacture essentially without removing material
  • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
  • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
  • F05D2230/238—Soldering
• • 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
  • F05D2230/644—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins for adjusting the position or the alignment, e.g. wedges or eccenters
• • 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 invention relates to a method for producing and repairing a turbomachine member, such as a turbine distributor or a stator ring.
• the state of the art includes in particular the documents EP-A2-2 372 101, EP-A2-1 985 807 and DE-A1 -102 59 963.
• a turbine distributor for example low-pressure, comprises an annular row of blades extending between an inner annular platform and an outer annular platform.
• the distributor is part of the stator of the turbine and is interposed between two rotor wheels.
• the outer annular platform of the distributor comprises means for attachment to a turbine casing and its inner annular platform comprises a cylindrical annular wall for fixing a ring of abradable material.
• This ring is for example of the NIDA type (honeycomb) and is intended to cooperate by friction with radially outer annular wipers of the rotor of the turbine, in order to limit air leakage between the distributor and the rotor.
• the abradable ring is fixed on the cylindrical wall by soldering.
• This technology has many drawbacks in particular related to the rectification step.
• This grinding step results in a significant downtime of the turbomachine and a specific installation and tooling that are relatively expensive, in particular because the installation must reproduce the positioning of the distributor vis-à-vis the rotor.
• This ring comprises fastening means on a stator housing and surrounds a rotor wheel. It has an annular supporting wall of an abradable ring which is intended to cooperate by friction with annular radially outer wipers of the rotor wheel, in order to limit air leakage between the casing and the rotor.
• the abradable ring is fixed by brazing on the annular wall of the ring, and must be ground. If worn, it is removed by machining for replacement.
• the invention proposes a solution to the aforementioned problem that is simple, effective and economical.
• the invention proposes a method for producing a turbomachine member, such as a turbine distributor, this member comprising an annular supporting wall of an abradable ring, the method comprising a soldering step of the abradable ring. on the annular wall, characterized in that the abradable ring is finite ribs, the method being devoid of rectification step of the ring after its attachment to the annular wall.
• the method thus differs from the prior art in particular in that it does not include a step of grinding the crown, posterior to its attachment to the annular wall. This is made possible by the fact that the abradable crown is already on the finished ribs before fixing.
• the invention is thus particularly advantageous because it makes it possible to eliminate the prior art rectification step, which is long, expensive and complex to implement.
• the invention furthermore proposes a method for repairing a turbomachine member, such as a turbine distributor, this member comprising an annular supporting wall of an abradable ring, the method comprising first repair steps consisting of:
• Step a) can be performed by machining.
• the annular wall of the distributor is machined so that it has a predetermined radial dimension, referred to as reference.
• the repair method may comprise one or more of the following features or steps, which may be taken separately from one another or in combination with each other:
• step a) is performed by machining
• step a An inner peripheral portion of the annular wall is removed in step a), until the annular wall has a predetermined radial dimension;
• the method comprises second repair steps consisting of:
• the plate is a sheet, which has for example a thickness of 1 mm;
• the method comprises third repair steps consisting of:
• step f) can be performed by machining; advantageously, the distributor plate is machined so that it has a predetermined radial dimension, referred to as reference;
• the plate has a predetermined radial dimension at the end of step f), and in that the fourth ring has a radial thickness identical to that of the second ring;
• the plate and / or the abradable ring may be sectored, and each comprise an annular row of circumferentially end-to-end sectors;
• the method comprises a step of marking the distributor after the or each repair; this marking step is particularly advantageous because it allows a maintenance operator for example to quickly know if the body has already been repaired and, if so, how many repairs he has undergone.
• the present invention also relates to a turbomachine member, comprising an annular support wall of an abradable ring, characterized in that it comprises at least one identification marking of one or more repairs of the body by replacing the crowned.
• the abradable ring may be soldered to a plate which is itself soldered to the annular wall.
• the plate and / or the abradable crown can be sectored.
• This member may be a turbine distributor or a stator ring.
• FIG. 1 and 2 are schematic half-views in axial section of a turbine valve, respectively with and without abradable crown, and illustrate steps of an embodiment of the invention
• - Figures 3 to 5 are partial schematic views on a larger scale of a turbine valve, and illustrate steps of a repair method according to the invention
• FIG. 6 is a flowchart showing steps of a repair method according to the prior art
• FIG. 7 is a flowchart showing steps of a repair method according to the invention.
• FIG. 8 is a diagrammatic half-view in axial section of a stator ring.
• FIG. 9 is a flow chart showing steps of an alternative embodiment of a repair method according to the invention.
• FIGS 1 and 2 illustrate an embodiment of the method according to the invention for producing a turbomachine member, which is here a distributor 1 0 turbine and more precisely low pressure turbine.
• the distributor 10 comprises two annular platforms, respectively internal
• the external platform 14 comprises means 1 8 for attachment to a stator housing, not shown.
• the inner platform 1 2 comprises an annular wall 20, here cylindrical, for supporting an abradable ring 22, for example of the honeycomb type.
• the annular wall 20 extends coaxially and inside another annular wall 24 of the platform 1 2, and is connected to this other annular wall 24 by a substantially radial wall 26.
• the outer annular surface of the wall 24 internally defines the flow vein of the air flow in the turbine.
• the abradable ring 22 is preferably sectorized.
• the abradable ring 22 is fixed on the radially inner surface of the annular wall 20 by brazing, for example by means of a solder strip sandwiched between the wall and the ring.
• the abradable ring 22 is at the finished ribs before its fixing by brazing, so as to eliminate any operation of grinding the ring after its fixing.
• the ring 22 has a radial thickness r1 and the radial side of the distributor, measured between the radially inner and outer ends of the distributor (here between the radially inner end of the ring 22 and the radially outer end of the gripping means 18), is noted e1.
• each step I and II of replacing a worn crown C1, C2 with a new ring C2, C3 is followed by a step of rectification R1 and RII of this new ring.
• a crown is designated by C, this letter being associated with a number corresponding to the number of the crown.
• C1 refers to the first crown or crown of origin of a dispenser
• C2 refers to the second ring of the dispenser, that is to say to the crown of replacement of the first crown (at a first repair or repair / replacement stage), and so on.
• the first repair operation I consists in removing the worn crown C1 by machining the ring and an inner peripheral portion D 'of the annular support wall of this ring (the radial thickness of which decreases), and then to be set by soldering. the new C2 crown.
• This first repair operation I is followed by a step RI for grinding the ring C2 by machining.
• the second repair operation II consists in removing the worn crown C2 by machining the crown and an inner peripheral portion D "of the annular supporting wall of this ring (the thickness of which decreases further) and then fixing by soldering. the new C3 crown.
• This second repair operation II is followed by a step RII for grinding the crown C3 by machining.
• the repair method illustrated in Figures 3 to 5 and 7 does not include a crown grinding step.
• the dispenser As described above with reference to FIGS. 1 and 2, the dispenser
• D is achieved by connecting and fixing by soldering a first ring C1 on the aforementioned annular wall of the distributor.
• the first repair operation I consists in removing the worn crown C1 by machining the ring and an inner peripheral portion D 'of the annular supporting wall of this ring (the thickness of which decreases), and then brazing the new ring C2, for example by means of a solder strip sandwiched between the ring C2 and the wall of the distributor D.
• This maintenance operation is advantageously followed by a step MI of the distributor to clearly identify that the distributor D has been repaired once.
• the distributor of FIG. 3 is then obtained.
• the ring C2 is finite ribs and does not undergo rectification after fixing by brazing.
• the thickness of material D which is removed from the annular wall of the distributor is here controlled so that the radial thickness of the ring C2 catches this loss in thickness. It is thus understood that the thickness of the ring C2 is greater than that of the ring C1 and that a radial material thickness is initially advantageously provided on the annular wall to allow the machining operation during the first repair operation. I.
• d1 'here represents the radial reference coast of the distributor without crown.
• a second repair operation II is implemented.
• the second repair operation II consists in removing the worn crown C2 by machining the crown and an inner peripheral portion D "of the annular supporting wall of this ring (the thickness of which decreases further) and then fixing by soldering. the new crown C3 but via a sheet metal plate P interposed between the ring C3 and the annular wall of the distributor, for which a first solder strip is inserted between the plate P and the annular wall and a second solder strip is interposed between the ring C3 and the plate P.
• the plate P is preferably sectorized.
• This maintenance operation II is advantageously followed by a mil marking step of the distributor to be able to clearly identify that the distributor D has been repaired twice.
• the distributor of FIG. 4 is then obtained.
• the crown C3 is on the finished ribs and does not undergo a correction after fixing by soldering.
• the thickness of material D "which is removed from the annular wall of the distributor is here controlled so that the radial thickness r1 of the ring C2 and / or the thickness h1 of the plate P compensates for this loss in thickness.
• C3 is less than that of C2 and may be identical to that of C1.
• the plate P has, for example, a thickness h1 of about 1 mm.
• a third repair operation III is implemented.
• the third repair operation III consists in removing the worn crown C3 by machining the ring and an inner peripheral portion P 'of the plate P (the thickness of which decreases), and then brazing the new ring C4 onto the plate P, for example by means of a solder strip sandwiched between the plate and the ring.
• This maintenance operation III is advantageously followed by a MIII marking step of the distributor to be able to clearly identify that the distributor D has been repaired three times.
• the distributor of FIG. 5 is then obtained.
• the crown C4 is on the finished ribs and does not undergo any grinding after fixing by soldering.
• the thickness of material P ' which is removed from the plate P is here mastered in particular so that the radial side d1' of the distributor without the crown C4, is equal to the aforementioned reference radial coast (see Figure 3).
• the number of repairs that a turbine distributor can undergo can be limited to three. Alternatively and as shown in Figure 7, this number may be higher.
• the invention can be applied to a stator ring 30 as shown in FIG. 8.
• the various steps represented in FIG. 7 in particular being applicable directly to this ring, which can thus undergo several successive repair operations with a view to replacing its abradable crown.
• FIG. 9 represents an alternative embodiment of a repair method according to the invention, which incorporates the references I, II, III, C1, C2, etc., already used in the foregoing.
• Z1 is the value of the effective radial rib of the distributor after removal of the ring C1 and an inner peripheral portion of its annular wall or plate.
• the annular wall of the distributor is machined so that it has the aforementioned radial reference coast, d1 '. If its effective radial dimension Z1 is greater than this reference value d1 ', the annular wall is machined to this reference value. If, on the other hand, its radial side Z1 is smaller than this reference value d1 ', the first repair step I can not be carried out and the distributor must be repaired as if it were a second repair II . During the second repair II, the annular wall of the distributor is machined so that it has the radial side d1 ". During the third repair III, the plate P is machined so that it has the rib reference radial above, d1 '.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Supercharger (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=52627269

Family Applications (1)

Country Status (8)

Families Citing this family (1)

Family Cites Families (17)

• 2014
  • 2014-06-23 FR FR1455759A patent/FR3022578B1/fr active Active
• 2015
  • 2015-06-15 CN CN201580032991.4A patent/CN106460536B/zh active Active
  • 2015-06-15 BR BR112016029952-3A patent/BR112016029952B1/pt active IP Right Grant
  • 2015-06-15 WO PCT/FR2015/051582 patent/WO2015197942A1/fr not_active Ceased
  • 2015-06-15 RU RU2016152178A patent/RU2713230C2/ru active
  • 2015-06-15 CA CA2952750A patent/CA2952750C/fr active Active
  • 2015-06-15 US US15/320,708 patent/US10443427B2/en active Active
  • 2015-06-15 EP EP15733839.3A patent/EP3158171B1/de active Active

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