EP1564381A1 - Levier de commande du calage angulaire d'une aube dans une turbomachine - Google Patents
Levier de commande du calage angulaire d'une aube dans une turbomachine Download PDFInfo
- Publication number
- EP1564381A1 EP1564381A1 EP20050290139 EP05290139A EP1564381A1 EP 1564381 A1 EP1564381 A1 EP 1564381A1 EP 20050290139 EP20050290139 EP 20050290139 EP 05290139 A EP05290139 A EP 05290139A EP 1564381 A1 EP1564381 A1 EP 1564381A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- washer
- control lever
- pin
- control
- 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.)
- Granted
Links
- 238000002788 crimping Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 241000920340 Pion Species 0.000 description 3
- 230000016571 aggressive behavior Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
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
- 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
Definitions
- the present invention relates to a control lever for setting angle of a blade in a turbomachine, in particular the rigging angle of a rectifier in a compressor stage of the turbine engine.
- the setting of the angular setting of certain stator vanes in a turbomachine is intended to optimize the efficiency of this turbomachine and to reduce fuel consumption in different flight configurations.
- This setting is usually done for one or more rows of blades, by means of a control ring which surrounds externally the stator of the turbomachine and which is displaceable in rotation about the longitudinal axis of the stator by means engine such as a cylinder or an electric motor.
- the rotation of the ring is transmitted by control levers of the connecting rod type to the vanes of the row, each control lever being secured to a dawn at one of its ends and carrying at its other end a pawn that is engaged in a cylindrical housing of the control ring.
- the pin is mounted in an orifice of the end of the lever and is fixed on the lever by crimping, this operation consisting in crushing the end of the pin on the end of the lever which rests on an annular collar of the pawn. This operation generates important constraints in the part the lever on which the crimping of the pion is made, which weakens this part of the lever.
- the mechanical strength of the lever being reduced by crimping pawn, cracks or cracks may appear on the lever at the end a certain time of operation of the turbomachine and cause the rupture of the control lever, which can cause the stop of the turbomachine and should therefore be considered a very serious incident.
- the main purpose of the present invention is to remove this risk of breaking control levers.
- a control lever of the angular setting of a blade in a turbomachine said lever having a first end to be mounted on a blade pivot to drive it into rotation and a second end comprising a cylindrical pin of mounting on a control ring, this pin being fixed by crimping one of its ends in an orifice of the second end of the lever and having an annular collar on which the second end of the lever, characterized in that means for distributing constraints are interposed between the second end of the lever and the crimped end of the pawn.
- the distribution means of constraints include a washer.
- the puck allows to distribute the crimping stresses on a sufficient surface and has the advantage to be simple and very inexpensive.
- the washer is made of a softer material than that of the control lever. it allows the washer to absorb the crimping mechanical forces by plastically deforming and effectively protecting the second end lever against any mechanical aggression during crimping.
- the washer is made of a material harder than that of the control lever. This washer has less tendency to deform than in the first mode of realization and better distributes crimping constraints.
- the substantially flat annular surface of the washer applied to the second end of the lever, has an annular edge convex or chamfered at its outer periphery.
- an advantage of the present invention is to avoid in a simple, effective and inexpensive way the risks of rupture levers for controlling the angular setting of the stage rectifiers compressor in a turbomachine, which could result from crimping the pins at the ends of the levers.
- FIG. 1 a portion of a compressor stage 1 is shown high pressure of a turbomachine, in which each stage of the compressor comprises a row of vanes 2 mounted on the stator and a row of blades 3 carried by the rotor.
- the blades 2 of the stator are rectifiers whose orientation angular is adjustable using control levers 4, driven in rotation by a control ring 5 actuated by a cylinder or motor electric.
- Each control lever 4 is fixed by one end 6 on a radial pivot 7 of a blade 2, the pivot 7 being guided in rotation in a bearing 8 mounted in a radial orifice of the housing 9.
- the other end 10 of the lever of control 4 carries a pin 11 which is crimped on this end 10 of the lever 4 and is guided in rotation in a cylindrical sleeve 12 of the control ring 6.
- Figures 2 and 3 illustrate the crimping of a pin 11 on the end 10 of the control lever in the known art, the pin being usually made of steel and the titanium lever.
- the pawn is a straight cylindrical element that has an annular collar 13 in the vicinity of one of its ends.
- This flange 13 forms a support for the end 10 of the lever 4, which has an orifice in which is engaged the upper end 14 of the pawn.
- This end of the pin 11 comprises, above the collar 13, a cylindrical axial bore for crimping the pin on the end 10 of the lever. Crimping is done by pressing a tool suitable in the bore to fold down and flatten the upper end 14 the pin on the end 10 of the lever as shown in Figure 3.
- the present invention makes it possible to eliminate this risk by means of means of distribution of stresses interposed between the crimped end of pin and the end 10 of the control lever 4.
- Figures 4 and 5 illustrate two embodiments of these stress distribution means, which are formed of a flat washer 16, 17 with a circular contour having an axial circular orifice whose diameter is slightly greater than the diameter of the peg 11.
- the thickness of the washer is of the order of a millimeter and the outer diameter of the washer does not exceed that of the flange 13 of the pin 11.
- the washer 16 is a washer with two parallel flat and identical faces and is made in one softer material than that of the lever 4, that is to say in material which has a Young's modulus lower than that of the material of the lever 4, which is usually made of titanium.
- the washer 16, for example in polymer, can deform plastically during crimping without damage the control lever 4 and spreading the stresses on the end 10 of the lever 4.
- the washer 17 interposed between the crimped end of the pin and the lever 4 is made of a material having a Young's modulus greater than that of material of the control lever 4.
- This material may be, for example, a polymer or a metal.
- the washer 17 has a surface 18 in contact with the end 10 of the lever 4, which is formed with an annular edge 19 convex over its entire outer periphery ( Figure 6) or with an edge 20 chamfered outside (figure 7).
- This configuration of the washer 17 makes it possible not to create peaks in the lever 4 at the outer periphery of the washer, when crimping, the convex rounding 19 or the chamfer 20 to release progressively the constraints in the material of the lever 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Turbines (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
Description
- la figure 1 est une vue schématique partielle illustrant le montage d'un levier de commande du calage angulaire d'un redresseur dans un étage de compresseur d'une turbomachine, selon la technique antérieure ;
- les figures 2 et 3 sont des vues schématiques de côté illustrant le sertissage du pion sur le levier de commande dans la technique antérieure ;
- la figure 4 est une vue schématique partielle d'un premier mode de réalisation du levier de commande selon l'invention ;
- la figure 5 est une vue schématique partielle d'un second mode de réalisation du levier de commande selon l'invention ;
- les figures 6 et 7 sont des vues schématiques agrandies en coupe axiale de la rondelle de répartition de contraintes du second mode de réalisation de l'invention.
Claims (10)
- Levier de commande du calage angulaire d'une aube dans une turbomachine, ledit levier (4) ayant une première extrémité (6) destinée à être montée sur un pivot (7) d'aube (2) pour l'entraíner en rotation et une seconde extrémité (10) comportant un pion (11) cylindrique de montage sur un anneau (5) de commande, ce pion (11) étant fixé par sertissage d'une de ses extrémités dans un orifice de la seconde extrémité (10) du levier (4) et comportant une collerette (13) annulaire sur laquelle est appliquée la seconde extrémité (10) du levier (4), caractérisé en ce que des moyens (16, 17) de répartition de contraintes sont interposés entre la seconde extrémité (10) du levier (4) et l'extrémité sertie (14) du pion.
- Levier de commande selon la revendication 1, caractérisé en ce que les moyens de répartition de contraintes comprennent une rondelle (16, 17).
- Levier de commande (4) selon la revendication 2, caractérisé en ce que la rondelle (16) est réalisée en un matériau plus souple que celui du levier de commande (4).
- Levier de commande selon la revendication 3, caractérisé en ce que la rondelle (16) est en polymère.
- Levier de commande selon la revendication 2, caractérisé en ce que la rondelle (17) est en matériau plus dur que celui du levier de commande (4).
- Levier de commande selon la revendication 5, caractérisé en ce que la rondelle (17) est en polymère ou en métal.
- Levier de commande selon la revendication 5 ou 6, caractérisé en ce que la rondelle (17) comporte une surface annulaire sensiblement plane appliquée sur la seconde extrémité (10) du levier (4) et présentant un bord annulaire convexe (19) ou chanfreiné (20) à sa périphérie extérieure.
- Levier de commande selon l'une des revendications 2 à 7, caractérisé en ce que l'épaisseur de la rondelle (16, 17) est de l'ordre du millimètre.
- Levier de commande selon l'une des revendications 2 à 8, caractérisé en ce que la rondelle (16, 17) a un diamètre extérieur égal ou légèrement inférieur à celui de la collerette (13) du pion (11).
- Levier de commande selon l'une des revendications précédentes, caractérisé en ce qu'il est réalisé en titane et le pion (11) est réalisé en acier.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0401086A FR2866058B1 (fr) | 2004-02-05 | 2004-02-05 | Levier de commande du calage angulaire d'une aube dans une turbomachine |
FR0401086 | 2004-02-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1564381A1 true EP1564381A1 (fr) | 2005-08-17 |
EP1564381B1 EP1564381B1 (fr) | 2015-10-28 |
Family
ID=34684992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05290139.4A Active EP1564381B1 (fr) | 2004-02-05 | 2005-01-21 | Levier de commande du calage angulaire d'une aube dans une turbomachine |
Country Status (7)
Country | Link |
---|---|
US (1) | US7281892B2 (fr) |
EP (1) | EP1564381B1 (fr) |
JP (1) | JP4806199B2 (fr) |
CA (1) | CA2494770C (fr) |
FR (1) | FR2866058B1 (fr) |
RU (1) | RU2355893C2 (fr) |
UA (1) | UA83466C2 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1722073B1 (fr) * | 2005-05-13 | 2013-01-23 | BorgWarner, Inc. | Anneau de commande d'un turbocompresseur à géométrie variable |
US9353643B2 (en) * | 2007-04-10 | 2016-05-31 | United Technologies Corporation | Variable stator vane assembly for a turbine engine |
US8668444B2 (en) * | 2010-09-28 | 2014-03-11 | General Electric Company | Attachment stud for a variable vane assembly of a turbine compressor |
DE102013002968A1 (de) * | 2013-02-22 | 2014-08-28 | Dt Swiss Ag | Laufrad für wenigstens teilweise muskelbetriebene Fahrzeuge und insbesondere Fahrräder |
US9784285B2 (en) | 2014-09-12 | 2017-10-10 | Honeywell International Inc. | Variable stator vane assemblies and variable stator vanes thereof having a locally swept leading edge and methods for minimizing endwall leakage therewith |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3788763A (en) | 1972-11-01 | 1974-01-29 | Gen Motors Corp | Variable vanes |
FR2793521A1 (fr) | 1999-05-10 | 2000-11-17 | Techlam | Biellette de commande d'aube a calage variable |
US20020034439A1 (en) * | 2000-09-18 | 2002-03-21 | Snecma Moteurs | Device for controlling variable-pitch blades |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3788463A (en) * | 1972-01-31 | 1974-01-29 | Maryland Cup Corp | Bundling method and article produced thereby |
GB8913988D0 (en) * | 1989-06-17 | 1989-08-09 | Rolls Royce Plc | Improvements in or relating to control of variable stator vanes |
CA2082709A1 (fr) * | 1991-12-02 | 1993-06-03 | Srinivasan Venkatasubbu | Aubage de stator a incidence variable pour compresseur a ecoulement axial de turbomachine |
FR2835562B1 (fr) * | 2002-02-07 | 2004-07-16 | Snecma Moteurs | Agencement de pivotement d'aube de stator dans une turbomachine |
-
2004
- 2004-02-05 FR FR0401086A patent/FR2866058B1/fr not_active Expired - Lifetime
-
2005
- 2005-01-21 EP EP05290139.4A patent/EP1564381B1/fr active Active
- 2005-01-31 US US11/045,264 patent/US7281892B2/en active Active
- 2005-01-31 JP JP2005023305A patent/JP4806199B2/ja active Active
- 2005-01-31 CA CA2494770A patent/CA2494770C/fr active Active
- 2005-02-03 UA UAA200500994A patent/UA83466C2/uk unknown
- 2005-02-04 RU RU2005102775/06A patent/RU2355893C2/ru active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3788763A (en) | 1972-11-01 | 1974-01-29 | Gen Motors Corp | Variable vanes |
FR2793521A1 (fr) | 1999-05-10 | 2000-11-17 | Techlam | Biellette de commande d'aube a calage variable |
US20020034439A1 (en) * | 2000-09-18 | 2002-03-21 | Snecma Moteurs | Device for controlling variable-pitch blades |
Also Published As
Publication number | Publication date |
---|---|
RU2005102775A (ru) | 2006-07-10 |
JP4806199B2 (ja) | 2011-11-02 |
FR2866058A1 (fr) | 2005-08-12 |
CA2494770C (fr) | 2012-08-28 |
US7281892B2 (en) | 2007-10-16 |
RU2355893C2 (ru) | 2009-05-20 |
FR2866058B1 (fr) | 2006-06-02 |
EP1564381B1 (fr) | 2015-10-28 |
JP2005220907A (ja) | 2005-08-18 |
UA83466C2 (uk) | 2008-07-25 |
US20050175445A1 (en) | 2005-08-11 |
CA2494770A1 (fr) | 2005-08-05 |
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