EP2526301A1 - Liaison diffuseur-redresseur pour un compresseur centrifuge - Google Patents
Liaison diffuseur-redresseur pour un compresseur centrifugeInfo
- Publication number
- EP2526301A1 EP2526301A1 EP11704655A EP11704655A EP2526301A1 EP 2526301 A1 EP2526301 A1 EP 2526301A1 EP 11704655 A EP11704655 A EP 11704655A EP 11704655 A EP11704655 A EP 11704655A EP 2526301 A1 EP2526301 A1 EP 2526301A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diffuser
- rectifier
- flange
- assembly
- screw
- 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
- 230000007717 exclusion Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 210000003462 vein Anatomy 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- 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
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/246—Fastening of diaphragms or stator-rings
-
- 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
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers 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
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
Definitions
- the field of the present invention is that of turbomachines and, in particular, that of the compressors of these turbomachines.
- the aeronautical turbomachines are conventionally constituted by a set of assembled modules, comprising in the direction of air circulation, one or more compressors, a combustion chamber, one or more turbines which drive the compressor or compressors via drive shafts by drawing power on the gases leaving the combustion chamber, and at the outlet, a nozzle in which the exhaust gases are ejected to produce thrust, or a free turbine which recovers the energy of the gas to produce mechanical power.
- the compressors are conventionally either of the axial type where the flow of air passing through them follows a substantially axial direction from the inlet to the outlet, or of the so-called centrifugal type where the air enters axially to come out in a radial direction.
- a centrifugal compressor the air is collected at the outlet of the compression wheel by a radial part, called a diffuser, then transferred to a second part, called a rectifier, which brings back the flow of compressed air in a direction substantially axial, before its introduction into the combustion chamber.
- One-piece rectifiers are also known which are fixed by bolting on flanges connected to the motor structure, but these configurations are characterized by additional parts which induce a penalty in terms of mass. Moreover, these flanges can deform under the action of vibration or thermal expansion and do not ensure perfect continuity of the vein between the diffuser and the rectifier.
- the present invention aims to overcome these disadvantages by providing a connection device between the diffuser and the rectifier that does not have at least some of the disadvantages of the prior art and, in particular, which is lightweight, simple to mount and to disassemble and which ensures a good alignment of the air circulation ducts at the outlet of the compressor.
- the subject of the invention is an assembly consisting of a diffuser and a rectifier of the air flow at the outlet of a centrifugal compressor of a turbomachine, said diffuser having substantially the shape of a double disk. radially oriented ring, and said rectifier being a double O-piece, positioned in the extension of the double disk of the diffuser and curved to deflect the air flow downstream of the engine, characterized in that said rectifier is fixed on said diffuser by a link positioned in the immediate vicinity of the contact surface of the two parts and dismountable by means of a standard tool, to the exclusion of any other support means.
- connection eliminates the risk of misalignment of the two parts, while remaining easily removable, without the operator needing to resort to means other than those currently available.
- a standard tooling must be understood as a tool transportable by the operator that is adapted to be implemented on the mounting station or disassembly of the turbomachine.
- the connection is a connection by screw and nut.
- the diffuser comprises on one of its disks, at its contact surface with said rectifier, a flange parallel to said disk and delimiting with it a groove adapted to receive the head of said screw and having at least one notch adapted to let the rod of said screw.
- the rectifier comprises, at its contact surface with said diffuser, a ring-shaped ring whose section comprises a first portion L, which envelops the end of the diffuser, followed by a second part having the form of a flange that comes to wrap the corresponding flange of the diffuser.
- the rectifier at its surface intended to cooperate with the disk of the diffuser opposite to the disk carrying said flange, comprises a ring-shaped ring with L. section.
- the diffuser comprises, on its disc opposite the one carrying said flange, an L-shaped flange, which extends axially towards the outside of the diffuser and projects radially so as to form a flange. cross stop for the rectifier.
- the screw comprises on its head a truncated portion so as to constitute an anti-rotation member by cooperation with the bottom of the groove.
- the invention also relates to a compressor module for a turbomachine, comprising a diffuser-rectifier assembly as described above and, finally, a turbomachine comprising such a diffuser-rectifier assembly positioned at the outlet of a centrifugal compressor.
- FIG. 1 is a sectional view of a diffuser-rectifier assembly for a centrifugal compressor, according to one embodiment of the invention
- FIG. 2 is a sectional view of the diffuser-rectifier connection according to one embodiment of the invention.
- FIG. 3 is a perspective view of an assembly screw of the diffuser-rectifier connection according to one embodiment of the invention.
- FIG. 4 is a perspective view of a notch in the flange of the diffuser for the realization of a connection according to one embodiment of the invention
- FIG. 5 is a perspective view of an assembly screw in place in the groove of a diffuser for a connection according to one embodiment of the invention
- FIG. 6 is a perspective view of a diffuser-rectifier connection according to one embodiment of the invention, before the establishment of the clamping nut;
- FIG. 7 is a perspective view of a diffuser-rectifier connection according to one embodiment of the invention, after the establishment of the clamping nut.
- FIG. 1 there is shown a diffuser 1 placed at the outlet of the mobile wheel of a centrifugal compressor, not shown, and a rectifier 2 which causes the flow of compressed air a deviation of about 120 ° for send it to a combustion chamber, not shown as well.
- the diffuser 1 is substantially in the form of a radially oriented double annular disk in the center of which the compressor wheel is inserted and which forms a conduit for collecting the compressed air.
- the rectifier 2 is a two-sided O-piece, positioned in the extension of the double disk of the diffuser and which is bent to deflect the flow of air downstream of the engine (the downstream being represented on the right in FIG. 1) .
- the downstream disk 3 of the diffuser comprises, positioned outside the diffuser, a flange 4 parallel to the downstream disk 3 and running on its entire circumference, which is connected to the downstream disk by a bridge so as to create a groove 5 between the flange 4 and the downstream disk 3.
- the flange 4 is positioned against the disk located downstream, that is to say the disk accessible last during assembly in the presented configuration; it is obvious that this type of connection may include a flange 4 mounted on the upstream disk, if it is the latter which is accessible last during the assembly of the engine.
- the disk of the diffuser 1 terminates in an L-shaped flange 6, which extends first axially towards the outside of the diffuser so as not to disturb the flow of the air flow at the interior of said diffuser and which then projects radially so as to constitute a transverse stop flange for the rectifier.
- L-shaped flange 6 extends first axially towards the outside of the diffuser so as not to disturb the flow of the air flow at the interior of said diffuser and which then projects radially so as to constitute a transverse stop flange for the rectifier.
- the rectifier 2 terminates at its junction with the diffuser 1, on the upstream side, by an upstream ring 7 of L-shaped section whose axial extension cooperates with the flange L 6 of the diffuser and, on the downstream side by a downstream ferrule 8 also of toric form.
- the section of the downstream ferrule 8 comprises a first portion 8a, L, which envelops the end of the diffuser, and continues with a second portion 8b in the form of a flange which caps the corresponding flange 4 of the diffuser 1.
- Maintaining the rectifier 2 on the diffuser 1 is provided by a screw 9 whose head is placed in the groove 5 and which extends perpendicularly to the wall of the downstream disc 3.
- This screw passes through, on the one hand, the flange 4 of the diffuser at a notch 11 formed in said flange and secondly the second portion 8b of the downstream ferrule 8 at a bore 12.
- the assembly is tightened by means of a nut 10 which cooperates with the screw 9 and which is based on the second part 8b.
- Figures 3 and 4 show the screw 9 whose head is truncated to reveal a flat portion 13 and the notch 11 formed in the wall of the flange 4 of the diffuser.
- Figures 5 to 7 show the sequence of operations for mounting a rectifier 2 on a diffuser 1.
- the rod of the screw 9 is positioned perpendicular to the flange 4 and passes through the notch 11 formed in this flange.
- the rectifier 2 has been installed on the diffuser 1, by an axial translation movement.
- the downstream ferrule 8 is here represented in transparency.
- the first part 8a of the shell extends in the background, in the extension of the downstream disc 3, while the second part 8b covers the flange 4 of the diffuser.
- the rod of the screw 9 passes through the second portion 8b by the bore 12 made for this purpose.
- Figure 7 shows the assembled diffuser-rectifier assembly.
- the nut 10 is screwed onto the rod of the screw 9 and secures the ferrule 8 of the rectifier with the flange 4 of the diffuser.
- the diffuser 1 is preferably made from a piece cut in the mass, the groove 5 being machined in an extra thickness left on the downstream disc 3.
- the groove being machined, notches are then performed in the flange 4 of the diffuser, being distributed a priori regularly on the circumference of said flange.
- the rectifier 2 is, for its part, made by an attached sheet which reconstructs the air stream, on which is reported by welding or brazing the upstream and downstream ferrules 7 8 which provide the connection with the diffuser 1.
- This method of realization allows to realize the rectifier independently of the other parts of the turbomachine and in particular to resume the weld seam ferrules in case of overflow of the cord, before mounting the rectifier 2 on the diffuser 1. It can thus s ensure that no burrs from welding protrude into the air stream and disturb the flow by causing pressure drops or unwanted turbulence.
- the first improvement provided by the invention lies in a perfect alignment of the two parts, which remain aligned whatever the operating conditions and, in particular, whatever the level of vibration or thermal deformation of the parts. This characteristic results from the fitting of the ferrule 8 of the rectifier between one side the radial extension of the flange L 6 and the other side flange 4 of the diffuser.
- the tightening of the screw 9 further provides a stressing of this shell which is retained by the L-shaped flange and which is pushed against the flange 4 by the nut 10. This stressing ensures a good holding of the shell 8 and the perfect alignment of the ducts that channel the vein of air.
- the rectifier 2 is mounted directly on the diffuser 1, without connection by flanges with the engine structure, which avoids the deformations due to the flexibility of these holding flanges, as found in the prior art.
- the positioning of the clamping means of the rectifier 2 as close as possible to its connection with the diffuser 1 contributes to this improvement in the rigidity of the assembly and to the constant alignment of the conduits. This avoids the multiplicity of devices for maintaining the rectifier and the mass associated therewith.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1050328A FR2955364B1 (fr) | 2010-01-19 | 2010-01-19 | Liaison diffuseur-redresseur pour un compresseur centrifuge |
PCT/FR2011/050092 WO2011089355A1 (fr) | 2010-01-19 | 2011-01-19 | Liaison diffuseur-redresseur pour un compresseur centrifuge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2526301A1 true EP2526301A1 (fr) | 2012-11-28 |
EP2526301B1 EP2526301B1 (fr) | 2019-03-06 |
Family
ID=42330989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11704655.7A Active EP2526301B1 (fr) | 2010-01-19 | 2011-01-19 | Liaison diffuseur-redresseur pour un compresseur centrifuge |
Country Status (9)
Country | Link |
---|---|
US (1) | US9291171B2 (fr) |
EP (1) | EP2526301B1 (fr) |
JP (1) | JP5755250B2 (fr) |
CN (1) | CN102713308B (fr) |
BR (1) | BR112012017995B1 (fr) |
CA (1) | CA2787480C (fr) |
FR (1) | FR2955364B1 (fr) |
RU (1) | RU2561790C2 (fr) |
WO (1) | WO2011089355A1 (fr) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9469406B2 (en) * | 2014-09-26 | 2016-10-18 | Hamilton Sundstrand Corporation | Method of installing a diffuser in an air cycle machine |
DE102015219556A1 (de) | 2015-10-08 | 2017-04-13 | Rolls-Royce Deutschland Ltd & Co Kg | Diffusor für Radialverdichter, Radialverdichter und Turbomaschine mit Radialverdichter |
US10041365B2 (en) | 2015-11-24 | 2018-08-07 | General Electric Company | System of supporting turbine diffuser |
US10287920B2 (en) | 2015-11-24 | 2019-05-14 | General Electric Company | System of supporting turbine diffuser |
US10041377B2 (en) * | 2015-11-24 | 2018-08-07 | General Electric Company | System and method for turbine diffuser |
US10036283B2 (en) | 2015-11-24 | 2018-07-31 | General Electric Company | System and method for diffuser AFT plate assembly |
US10036267B2 (en) | 2015-11-24 | 2018-07-31 | General Electric Company | System of supporting turbine diffuser outlet |
US10837364B2 (en) | 2017-01-27 | 2020-11-17 | Raytheon Technologies Corporation | Thermal shield for gas turbine engine diffuser case |
US11603852B2 (en) | 2018-01-19 | 2023-03-14 | General Electric Company | Compressor bleed port structure |
CN109129267B (zh) * | 2018-10-13 | 2024-01-23 | 中国航发常州兰翔机械有限责任公司 | 一种环形箍带装配用工装及其工作方法 |
US11098730B2 (en) | 2019-04-12 | 2021-08-24 | Rolls-Royce Corporation | Deswirler assembly for a centrifugal compressor |
US11286952B2 (en) | 2020-07-14 | 2022-03-29 | Rolls-Royce Corporation | Diffusion system configured for use with centrifugal compressor |
US11441516B2 (en) | 2020-07-14 | 2022-09-13 | Rolls-Royce North American Technologies Inc. | Centrifugal compressor assembly for a gas turbine engine with deswirler having sealing features |
US11578654B2 (en) | 2020-07-29 | 2023-02-14 | Rolls-Royce North American Technologies Inc. | Centrifical compressor assembly for a gas turbine engine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1062428A1 (ru) * | 1982-07-02 | 1983-12-23 | Всесоюзный научно-исследовательский институт природных газов | Безлопаточный диффузор центробежной машины |
US5052891A (en) * | 1990-03-12 | 1991-10-01 | General Motors Corporation | Connection for gas turbine engine rotor elements |
US5555721A (en) * | 1994-09-28 | 1996-09-17 | General Electric Company | Gas turbine engine cooling supply circuit |
JPH11173296A (ja) * | 1997-12-11 | 1999-06-29 | Ebara Corp | ポンプのディフューザ装置 |
US6279322B1 (en) | 1999-09-07 | 2001-08-28 | General Electric Company | Deswirler system for centrifugal compressor |
US6280139B1 (en) | 1999-10-18 | 2001-08-28 | Pratt & Whitney Canada Corp. | Radial split diffuser |
US6585482B1 (en) * | 2000-06-20 | 2003-07-01 | General Electric Co. | Methods and apparatus for delivering cooling air within gas turbines |
RU2003107779A (ru) * | 2003-03-24 | 2005-01-20 | Открытое акционерное общество "Мовен" (RU) | Направляющее устройство |
US7442006B2 (en) * | 2005-08-15 | 2008-10-28 | Honeywell International Inc. | Integral diffuser and deswirler with continuous flow path deflected at assembly |
US7581397B2 (en) * | 2005-08-26 | 2009-09-01 | Honeywell International Inc. | Diffuser particle separator |
US20070183890A1 (en) | 2006-02-09 | 2007-08-09 | Honeywell International, Inc. | Leaned deswirl vanes behind a centrifugal compressor in a gas turbine engine |
FR2904033B1 (fr) * | 2006-07-19 | 2011-01-21 | Snecma | Ensemble diffuseur-redresseur pour une turbomachine |
US8438854B2 (en) | 2008-05-23 | 2013-05-14 | Honeywell International Inc. | Pre-diffuser for centrifugal compressor |
-
2010
- 2010-01-19 FR FR1050328A patent/FR2955364B1/fr active Active
-
2011
- 2011-01-19 CA CA2787480A patent/CA2787480C/fr active Active
- 2011-01-19 CN CN201180006286.9A patent/CN102713308B/zh active Active
- 2011-01-19 JP JP2012549400A patent/JP5755250B2/ja active Active
- 2011-01-19 WO PCT/FR2011/050092 patent/WO2011089355A1/fr active Application Filing
- 2011-01-19 BR BR112012017995-0A patent/BR112012017995B1/pt active IP Right Grant
- 2011-01-19 US US13/522,854 patent/US9291171B2/en active Active
- 2011-01-19 RU RU2012135461/06A patent/RU2561790C2/ru active
- 2011-01-19 EP EP11704655.7A patent/EP2526301B1/fr active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011089355A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102713308B (zh) | 2017-07-18 |
FR2955364B1 (fr) | 2012-11-16 |
CN102713308A (zh) | 2012-10-03 |
BR112012017995A2 (pt) | 2016-05-03 |
CA2787480C (fr) | 2017-11-21 |
JP2013517426A (ja) | 2013-05-16 |
WO2011089355A1 (fr) | 2011-07-28 |
RU2012135461A (ru) | 2014-02-27 |
EP2526301B1 (fr) | 2019-03-06 |
US20120308374A1 (en) | 2012-12-06 |
CA2787480A1 (fr) | 2011-07-28 |
JP5755250B2 (ja) | 2015-07-29 |
RU2561790C2 (ru) | 2015-09-10 |
FR2955364A1 (fr) | 2011-07-22 |
BR112012017995B1 (pt) | 2022-08-30 |
US9291171B2 (en) | 2016-03-22 |
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