WO2018037187A1 - Pièce d'interface pour reconditionner un anneau de commande d'un compresseur de moteur, et procédé de reconditionnement associé - Google Patents
Pièce d'interface pour reconditionner un anneau de commande d'un compresseur de moteur, et procédé de reconditionnement associé Download PDFInfo
- Publication number
- WO2018037187A1 WO2018037187A1 PCT/FR2017/052259 FR2017052259W WO2018037187A1 WO 2018037187 A1 WO2018037187 A1 WO 2018037187A1 FR 2017052259 W FR2017052259 W FR 2017052259W WO 2018037187 A1 WO2018037187 A1 WO 2018037187A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- control ring
- interface piece
- deformation
- machined
- Prior art date
Links
Classifications
-
- 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
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
- F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
-
- 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
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
-
- 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
- F05D2230/00—Manufacture
- F05D2230/80—Repairing, retrofitting or upgrading methods
-
- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
- F05D2240/128—Nozzles
Definitions
- the invention relates to engines, in particular of high power, and more precisely the high-pressure compressors which form part of such engines.
- Each control ring is equipped with guide pads which serve, on the one hand, to ensure its concentricity around the casing by adjusting the guide shoe / casing clearance, and, on the other hand, to limit its deformation caused by the forces aerodynamics on the blades with variable wedges which are exerted on the kinematics during operation.
- Each guide shoe is partially inserted into a corresponding housing of a control ring and is coupled thereto by a set screw.
- the latter comprises a first thread having a standard pitch "inch" (or thumb) which serves to secure its guide pad to the control ring (in its housing) and which is immobilized in rotation relative to the control ring by a clamping nut, and a second thread having a metric fine pitch which is screwed into the guide pad locked in rotation in its housing.
- the guide shoe slides in its housing through the presence of a game. Yet, in operation, the presence of this game causes, under the effect of friction forces when the guide pad is in contact with the casing, a pressure at the guide shoe / control ring interface. In some cases, this pressure is large enough to cause deformation (or damage) of the housing of the control ring, in particular by matting effect.
- control ring In the presence of such deformation (or damage), the control ring is considered to be non-compliant during an inspection visit, and therefore it is scrapped and must be replaced by a new control ring, which which turns out to be expensive.
- this deformation causes an increase in clearance between the housing and the guide shoe, which induces an increase in the bending forces experienced by the adjusting screw during operation of the motor, and therefore can induce a plastic deformation, see a rupture (in extreme cases, in particular of motor pumping), of this adjustment screw.
- the invention is therefore particularly intended to avoid a replacement of the control rings with housing (s) deformed (s), thanks to a repackaging intended to restore their links with the guide pads.
- the (each) deformed housing is machined so that it has dimensions adapted to the housing of an interface piece comprising holding lugs and a through housing having substantially identical dimensions to initial dimensions of the housing before deformation, then
- the interface piece is introduced into this machined housing until its retaining lugs ensure its immobilization with respect to the control ring.
- a control ring can be reconditioned to be used again in a high pressure compressor after standard guide pads have been housed in its housings (not deformed) and the housing (s) through (s) ) of its interface part (s) introduced into its machined housing (s).
- the interface piece can be introduced into the machined housing by force-fitting, inducing its deformation via a deformation slot that it comprises.
- the invention also proposes an interface piece intended to equip a control ring of a high-pressure compressor of a motor, this control ring having at least one housing intended to partially accommodate a guide shoe.
- This interface piece is characterized in that it comprises a central wall to which are secured two retaining tabs delimiting a through housing having dimensions substantially identical to initial dimensions of the housing, and suitable to be introduced into this housing , after it has been machined to accommodate it consecutively to a deformation, until its holding tabs ensure its immobilization relative to the control ring.
- the interface piece according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
- Its central wall may include a deformation slot adapted to allow its deformation during its introduction into the machined housing; > its deformation can be elastic;
- each holding tab can be flexible
- each holding lug may have a general L shape so as to bear tightly and partially on a lateral face of an edge of the control ring;
- each retaining tab may have a generally U-shaped so as to surround a portion of an edge of the control ring and to partially rest on a front face of this edge; >
- Each holding tab may comprise an end having at least one curvature so as to rest on a central portion of the control ring, located before the edge.
- the invention also proposes a control ring capable of equipping a high-pressure compressor with an engine, and comprising at least one a housing for partially accommodating a guide pad and at least one interface piece of the type shown above, partially introduced into this housing, after it has been machined to accommodate it consecutively to deformation.
- FIG. 1 schematically illustrates, in a perspective view, a portion of an example of a high-pressure compressor of an engine
- FIGS. 2A and 2B schematically illustrate, respectively in a bottom view and a sectional view, a part of a control ring forming part of the high-pressure compressor of FIG. 1 and comprising an undistorted housing of guide,
- FIGS. 3A and 3B schematically illustrate, respectively in a bottom view and a sectional view, a part of the control ring of FIGS. 2A and 2B, after machining of a deformed housing and before introduction of a interface piece according to the invention
- FIG. 4 schematically illustrates, in a perspective view and partially in section, a first exemplary embodiment of an interface piece according to the invention
- FIG. 5 schematically illustrates, in a perspective view and partially in section, the interface piece of FIG. 4 after it has been inserted into the machined housing of the control ring of FIGS. 3A and 3B,
- FIG. 6 schematically illustrates, in a view from below, the interface piece of FIG. 4 after its introduction into the machined housing of the control ring of FIGS. 3A and 3B, and
- FIG. 7 schematically illustrates, in a sectional view, a second embodiment of an interface piece after its introduction into the machined housing of the control ring of Figures 3A and 3B.
- the object of the invention is in particular to propose a PI interface piece intended to equip a control ring AC adapted to equip a high-pressure compressor CP of a motor and comprising at least one deformed housing, and an associated repackaging process.
- the high-pressure compressor CP is intended to equip a high-power engine of an aircraft, for example of the GE90-Base or GE90-1 15 or GP7200 type.
- a high-power engine of an aircraft for example of the GE90-Base or GE90-1 15 or GP7200 type.
- the invention is not limited to this type of engine. It concerns indeed any engine comprising a high pressure compressor comprising variable-pitch vanes (or VSV) controlled by control rings rotatably mounted around a housing.
- FIG. 1 schematically illustrates a portion of an example of a high-pressure compressor CP of a motor.
- This high-pressure compressor CP comprises in particular a casing CC on which are rotatably mounted control rings AC controlling variable-pitch blades.
- Each control ring AC comprises a plurality of LP housings (one of which (not deformed) is illustrated in FIGS. 2A and 2B) each partially housing a guide pad PG.
- the guiding pads PG ensure the concentricity of the control ring AC around the casing CC (by adjusting the play guide shoe / casing), and limit the deformation of the control ring AC which is generated by the aerodynamic forces on blades with variable timing.
- each housing LP comprises a first portion ("lower”) P1 in which is inserted a portion of the corresponding PG guide shoe, and a second portion (“upper”) P2 which communicates with the first part P1 and with the outside and which allows the passage of a set screw for coupling the PG guide shoe to the control ring AC.
- Each adjustment screw more specifically comprises a first thread having a standard pitch "inch” (or thumb) which serves to secure its PG guide pad to the control ring AC and which is immobilized in rotation with respect to this control ring AC by a tightening nut, and a second Thread having a metric fine pitch which is screwed into the PG guide shoe locked in rotation in its housing LP.
- the invention is intended to allow a reconditioning of a control ring AC having at least one housing LP which has been deformed. This repackaging is achieved by the implementation of a repackaging process according to the invention.
- a repackaging method comprises a step in which the deformed housing of a control ring AC is machined so that it has dimensions adapted to the housing of an interface piece (or " foil ") PI comprising retaining lugs PM and a through housing LT having dimensions substantially identical to initial dimensions that this housing had before it is deformed (and therefore when it constituted a non-deformed housing LP).
- first portion P1 of an LP housing (not deformed) which are concerned here (and not those that presents the first portion P1 of the deformed housing).
- the objective of the machining is indeed to transform the first portion P1 of the deformed housing so that it can accommodate a PI interface piece whose housing through LT is intended to replace "identically" the first part P1 that originally contained the LP housing before being deformed.
- FIG. 4 A first non-limiting exemplary embodiment of an interface piece (or foil) PI according to the invention is illustrated in FIG. 4.
- the PI interface piece comprises a central wall PC1 to which are joined two retaining tabs PM delimiting a through housing LT having dimensions substantially identical to initial dimensions of an LP housing, and suitable to be introduced into a machined housing LP '.
- the process step is continued by introducing a PI interface piece into the machined housing LP 'until its PM holding tabs ensure its immobilization relative to the control ring AC.
- the final position of the PI interface piece in the machined housing LP 'of a control ring AC is illustrated in FIGS. 5 and 6.
- the AC control ring Once the AC control ring has been reconditioned, by machining and coupling of PI interface piece (s), it can be used again in a CP high pressure compressor after standard PG guide pads have been housed in its housings. LP (not deformed) and LT through-hole (s) of its PI interface part (s) inserted into its machined LP housing (s) .
- the PI interface piece is introduced into the machined housing LP 'by force-fitting inducing its deformation via a deformation slot FD which it comprises (see FIG. 4).
- This deformation slot FD is, preferably and as illustrated in Figures 4 to 6, substantially linear and parallel to the insertion direction of the PI interface piece in the corresponding machined housing LP '. In addition, it preferably extends over the entire height of the central wall PC1.
- the deformation of the PI interface piece is elastic. This allows it to resume, after its introduction, substantially the shape it had before its introduction, and therefore its central wall PC1 contacts the inner face of the machined housing LP '.
- the PI interface piece can, for example, be made of a metallic material, such as the Inco 718. In this case, it can be made from a sheet metal formatting. But it could also be done by molding in a plastic or synthetic material, such as for example Vespel.
- each retaining tab PM of the PI interface piece is flexible. This facilitates the positioning of the PI interface piece in its final position and reinforces the immobilization of the latter (PI) relative to the control ring AC.
- holding tabs PM may have different shapes. Two of them are respectively illustrated in Figures 4 to 6 and 7.
- each retaining tab PM has a generally L-shaped shape so as to rest closely and partially on a lateral face FL of an edge B1 of the control ring.
- the AC control ring has a capital I-shaped section (or H turned 90 °). Therefore, it comprises a "lower" part comprising two lower edges B1, an "upper” part comprising two upper edges BS, and a central part PC2 connecting its lower and upper parts.
- Each lower edge B1 comprises a rear face FR, a front face FV, opposite its rear face FR, and a side face FL connecting its rear faces FR and before FV.
- each retaining tab PM thus surrounds part of the rear face FR and part of the lateral face FL of one of the two lower edges B1, and rests on this lateral face FL.
- the portion of the retaining tab PM which is placed in front of the lateral face FL may have at least one curvature, as illustrated in FIGS. 4 and 6.
- This first embodiment is advantageous because it allows a support on the lateral face FL independently of its height. In other words, it allows the use of the same PI interface piece on AC control rings whose lower edges B1 have different thicknesses.
- each retaining tab PM has a generally U-shaped shape so as to surround part of the lower edge B1 of the control ring AC (ie the rear faces FR, lateral FL and before FV) and to partially rest on the front face FV of this lower edge Bl.
- This second embodiment makes it possible to lock the immobilization of the PI interface piece with respect to the ring of AC command. However, it makes it less easy to position the PI interface piece in its final position with respect to the AC control ring.
- each holding tab PM may comprise an end (placed in front of the front face FV and the central part PC2) which has at least one curvature so as to rely on this central portion PC2 AC control ring (located before the lower edge Bl). This makes it possible to favor the support of the retaining tab PM on the central part PC2 of the control ring AC.
- a coating can be placed at least on the faces of the PI interface piece which are in contact with the inner face of the machined housing LP 'corresponding, so as to limit wear.
- this coating may be a varnish.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1902150.0A GB2567589B (en) | 2016-08-23 | 2017-08-22 | Interface member for reconditioning a control ring of an engine compressor, and associated reconditioning method |
US16/326,866 US11199199B2 (en) | 2016-08-23 | 2017-08-22 | Interface member for reconditioning a control ring of an engine compressor, and associated reconditioning method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1657871 | 2016-08-23 | ||
FR1657871A FR3055374B1 (fr) | 2016-08-23 | 2016-08-23 | Piece d'interface pour reconditionner un anneau de commande d'un compresseur de moteur, et procede de reconditionnement associe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018037187A1 true WO2018037187A1 (fr) | 2018-03-01 |
Family
ID=58213138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2017/052259 WO2018037187A1 (fr) | 2016-08-23 | 2017-08-22 | Pièce d'interface pour reconditionner un anneau de commande d'un compresseur de moteur, et procédé de reconditionnement associé |
Country Status (4)
Country | Link |
---|---|
US (1) | US11199199B2 (fr) |
FR (1) | FR3055374B1 (fr) |
GB (1) | GB2567589B (fr) |
WO (1) | WO2018037187A1 (fr) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1312764A2 (fr) * | 2001-11-15 | 2003-05-21 | General Electric Company | Système de support pour une aube de stator variable |
RU2219378C1 (ru) * | 2002-10-01 | 2003-12-20 | Иванов Адольф Павлович | Статор компрессора газотурбинного двигателя |
EP1439308A1 (fr) * | 2003-01-16 | 2004-07-21 | Snecma Moteurs | Dispositif anti-usure pour système de calage variable d'aube de turbomachine |
US20070048126A1 (en) * | 2005-07-05 | 2007-03-01 | General Electric Company | Variable stator vane lever arm assembly and method of assembling same |
Family Cites Families (21)
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FR2324935A2 (fr) * | 1974-01-11 | 1977-04-15 | Peugeot & Renault | Bague-coussinet a auto-rattrapage de jeux dans les paliers |
US4045637A (en) * | 1976-05-24 | 1977-08-30 | Tower Manufacturing Corporation | Electrical switch assembly having two-part housing with cover part consisting of plural flanges, internal rotation limit stop and external bushing |
FR2524934B1 (fr) * | 1982-04-08 | 1986-12-26 | Snecma | Dispositif de butee de securite pour pivot d'aubes de stator a calage variable |
US4498790A (en) * | 1983-11-21 | 1985-02-12 | United Technologies Corporation | Bushing securing apparatus |
FR2681640B1 (fr) * | 1991-09-25 | 1993-11-19 | Snecma | Turbomachine a aubes de stator a calage variable. |
US5271588A (en) * | 1992-07-17 | 1993-12-21 | General Electric Company | Multi-piece tube clamp |
US5593275A (en) * | 1995-08-01 | 1997-01-14 | General Electric Company | Variable stator vane mounting and vane actuation system for an axial flow compressor of a gas turbine engine |
US6086327A (en) * | 1999-01-20 | 2000-07-11 | Mack Plastics Corporation | Bushing for a jet engine vane |
FR2875559B1 (fr) * | 2004-09-21 | 2007-02-23 | Snecma Moteurs Sa | Levier de commande du calage angulaire d'une aube de stator dans une turbomachine |
US7360990B2 (en) * | 2004-10-13 | 2008-04-22 | General Electric Company | Methods and apparatus for assembling gas turbine engines |
FR2889242B1 (fr) * | 2005-07-27 | 2007-11-02 | Snecma | Douille pour pivot d'aube a angle de calage variable pour turbomachine |
FR2890707B1 (fr) * | 2005-09-14 | 2007-12-14 | Snecma | Douille pour pivot d'aube a angle de calage variable pour turbomachine |
US7588418B2 (en) * | 2006-09-19 | 2009-09-15 | General Electric Company | Methods and apparatus for assembling turbine engines |
GB2444736B (en) * | 2006-12-12 | 2009-06-03 | Rolls Royce Plc | Combustion Chamber Air Inlet |
US7722318B2 (en) * | 2007-02-13 | 2010-05-25 | United Technologies Corporation | Hole liners for repair of vane counterbore holes |
US9404374B2 (en) * | 2008-04-09 | 2016-08-02 | United Technologies Corporation | Trunnion hole repair utilizing interference fit inserts |
FR2964710B1 (fr) * | 2010-09-14 | 2012-08-31 | Snecma | Douille pour aube a calage variable |
US9796055B2 (en) * | 2013-02-17 | 2017-10-24 | United Technologies Corporation | Turbine case retention hook with insert |
US10385719B2 (en) * | 2013-08-28 | 2019-08-20 | United Technologies Corporation | Variable vane bushing |
FR3039226B1 (fr) * | 2015-07-20 | 2017-07-14 | Snecma | Etage d'aubes a calage variable pour une turbomachine |
FR3085060B1 (fr) * | 2018-08-17 | 2020-10-09 | Safran Aircraft Engines | Anneau de guidage d'aubes a calage variable et procede de montage dudit anneau |
-
2016
- 2016-08-23 FR FR1657871A patent/FR3055374B1/fr active Active
-
2017
- 2017-08-22 WO PCT/FR2017/052259 patent/WO2018037187A1/fr active Application Filing
- 2017-08-22 US US16/326,866 patent/US11199199B2/en active Active
- 2017-08-22 GB GB1902150.0A patent/GB2567589B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1312764A2 (fr) * | 2001-11-15 | 2003-05-21 | General Electric Company | Système de support pour une aube de stator variable |
RU2219378C1 (ru) * | 2002-10-01 | 2003-12-20 | Иванов Адольф Павлович | Статор компрессора газотурбинного двигателя |
EP1439308A1 (fr) * | 2003-01-16 | 2004-07-21 | Snecma Moteurs | Dispositif anti-usure pour système de calage variable d'aube de turbomachine |
US20070048126A1 (en) * | 2005-07-05 | 2007-03-01 | General Electric Company | Variable stator vane lever arm assembly and method of assembling same |
Also Published As
Publication number | Publication date |
---|---|
GB2567589B (en) | 2022-03-30 |
US20190195239A1 (en) | 2019-06-27 |
GB2567589A (en) | 2019-04-17 |
GB201902150D0 (en) | 2019-04-03 |
FR3055374A1 (fr) | 2018-03-02 |
FR3055374B1 (fr) | 2018-08-03 |
US11199199B2 (en) | 2021-12-14 |
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