EP1496206A1 - Amélioration de la capacité de rétention d'une aube à attache marteau dissymétrique - Google Patents
Amélioration de la capacité de rétention d'une aube à attache marteau dissymétrique Download PDFInfo
- Publication number
- EP1496206A1 EP1496206A1 EP04291705A EP04291705A EP1496206A1 EP 1496206 A1 EP1496206 A1 EP 1496206A1 EP 04291705 A EP04291705 A EP 04291705A EP 04291705 A EP04291705 A EP 04291705A EP 1496206 A1 EP1496206 A1 EP 1496206A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- upstream
- lip
- groove
- blade
- disk
- 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
- 230000014759 maintenance of location Effects 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 25
- 210000003462 vein Anatomy 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000035939 shock 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
- F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
Definitions
- the invention relates to blisk turbomachine disks, arranged in a conical vein, such as those forming the last stages of a low pressure compressor of a double-body turbojet engine double flow with high dilution ratio.
- the radius of the primary flow vein decreases from upstream to downstream in the compressor low pressure.
- the conicity of this vein is very high at the level of last floors.
- the blades of these stages extend obliquely in the vein relative to the plane perpendicular to the axis of rotation of the compressor, that is to say obliquely in relation to the direction of the centrifugal force.
- the invention relates more specifically to the blisk discs of this type in which the blades are retained by a type of fastener hammer in a peripheral groove of the disc, this groove being delimited by an upstream lip and a downstream lip, whose surfaces connected to the bottom of the groove form spans on which the flanks of the dawn feet are supported during the operation of the turbomachine, these spans supporting reaction forces whose resultant is preferably in the plane of centrifugal forces.
- EP 0 695 856 proposed a fastener Asymmetrical hammer, that is to say that the angle of the reach of the lip before, which has the largest diameter, with respect to a perpendicular plane to the axis of rotation, is greater than the angle formed between the reach of the lip downstream and said plane.
- Figure 4B of this document shows the blade-disk link in the case where the dawn, subjected to axial stresses important, rotates around the center of rotation C, consisting of the end of the reach of the downstream lip.
- Figure 1 shows Figure 4A EP 0 695 856.
- a blade whose foot 2 in the shape of a dovetail has an upstream flank 3a and a downstream flank 3b whose surfaces bear on bearings 4a, 4b internal faces of an upstream lip 5 and a downstream lip which delimit a groove 7 formed on the periphery of a disc 12 and whose bottom 8 is connects to the bearings 4a and 4b by rounded surfaces respectively 9a and 9b.
- the span 4a of the upstream lip 5 is located inside the circle (C), and the surfaces common to the geometric circle (C) and at the section of the upstream lip 5, by a plane containing the axis of rotation disc, are in the form of a crescent having a thickness maximum e.
- the object of the invention is to improve the retention capacity a blade asymmetric hammer of the type described above.
- the invention more specifically relates to a method for improve the retention capacity of hammer tie dawn asymmetrical which extends in a conical vein and whose foot is retained in a peripheral groove of a disc, said groove having a upstream lip and a downstream lip with spans that extend into asymmetrical planes with respect to a plane perpendicular to the axis of rotation of said disk and on which the surfaces of the upstream flanks and downstream of said foot are supported, the range of said upstream lip being connected to the bottom of said groove by a rounded surface and the flank upstream including in the vicinity of said rounded surface a heel located at the inside of a geometric circle (C) of radius (R) centered on the axis of possible pivoting of said blade as a result of an axial bias, said geometric circle (C) cutting in the upstream lip a crescent of thickness e.
- C geometric circle
- R radius
- reference 20 represents the section of the material removed from the disc 12 in the connection zone 9a between the 4a of the upstream lip 5 and the bottom 8 of the groove 7. This material can be removed for example by milling, or by grinding.
- the point 32 of the heel 31, furthest from the center of rotation C is distant from this center by a distance R1 greater than R, and the circle geometric (C1) center C and radius R1 cut in the lip 5 a crescent which has a thickness e1 greater than that of the crescent shown in Figure 1, which substantially improves the ability to retention of the modified blade 1 in the modified groove of the disc 12.
- FIG. 3 also shows that the angle A1 formed by the tangent to the circle (C1) at point 32 and the span 4a of the upstream lip 5 is greater than the corresponding angle A of the prior art
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Percussive Tools And Related Accessories (AREA)
- Food-Manufacturing Devices (AREA)
Abstract
Description
Claims (1)
- Procédé pour améliorer la capacité de rétention d'une aube (1) à attache marteau asymétrique qui s'étend dans une veine conique et dont le pied (2) est retenu dans une gorge périphérique (7) d'un disque (12), ladite gorge comportant une lèvre amont (5) et une lèvre aval (6) présentant des portées (4a, 4b) qui s'étendent dans les plans asymétriques par rapport à un plan perpendiculaire à l'axe de rotation dudit disque et sur lesquelles les surfaces (3a, 3b) des flancs amont et aval dudit pied sont en appui, la portée (4a) de ladite lèvre amont (5) étant raccordée au fond (8) de ladite gorge (7) par une surface arrondie (9a) et le flanc amont comportant au voisinage de ladite surface arrondie un talon (11) situé à l'intérieur d'un cercle géométrique (C) de rayon (R) centré sur l'axe de pivotement possible de ladite aube (1) par suite d'une sollicitation axiale, ledit cercle géométrique (C) découpant dans la lèvre amont (5) un croissant d'épaisseur e, caractérisé par le fait que :a) l'on modifie le raccord entre la portée (4a) de la lèvre amont (5) et le fond (8) de la gorge (7) par enlèvement de matière dudit disque, etb) on équipe ledit disque avec des aubes (30) dont le flanc amont (3a) présente un talon (31) plus volumineux afin d'augmenter la valeur du rayon (R) et la valeur de la distance e.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0308295A FR2857405B1 (fr) | 2003-07-07 | 2003-07-07 | Amelioration de la capacite de retention d'une aube a attache marteau dissymetrique |
| FR0308295 | 2003-07-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1496206A1 true EP1496206A1 (fr) | 2005-01-12 |
| EP1496206B1 EP1496206B1 (fr) | 2008-04-30 |
Family
ID=33443241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04291705A Expired - Lifetime EP1496206B1 (fr) | 2003-07-07 | 2004-07-06 | Amélioration de la capacité de rétention d'une aube à attache marteau dissymétrique |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7029237B2 (fr) |
| EP (1) | EP1496206B1 (fr) |
| JP (1) | JP4047837B2 (fr) |
| CA (1) | CA2472299C (fr) |
| DE (1) | DE602004013400T2 (fr) |
| ES (1) | ES2305684T3 (fr) |
| FR (1) | FR2857405B1 (fr) |
| RU (1) | RU2346165C2 (fr) |
| UA (1) | UA85164C2 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1726786A1 (fr) * | 2005-05-26 | 2006-11-29 | Snecma | Roue aubagée de rotor |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2861128B1 (fr) * | 2003-10-16 | 2007-06-08 | Snecma Moteurs | Dispositif d'attache d'une aube mobile sur un disque de rotor de turbine dans un turbomachine |
| EP1801355B1 (fr) * | 2005-12-23 | 2015-02-11 | Techspace Aero | Dispositif pour bloquer les aubes d'un disque de turbomachine |
| KR101014797B1 (ko) * | 2008-08-07 | 2011-02-15 | 김병길 | 이중 바닥 배선용 현수식 시스템 박스 |
| GB201416505D0 (en) | 2014-09-18 | 2014-11-05 | Rolls Royce Plc | Gas turbine engine |
| GB201502612D0 (en) * | 2015-02-17 | 2015-04-01 | Rolls Royce Plc | Rotor disc |
| US10683765B2 (en) * | 2017-02-14 | 2020-06-16 | General Electric Company | Turbine blades having shank features and methods of fabricating the same |
| CN114451680B (zh) * | 2021-01-19 | 2024-03-19 | 江西阳光安全设备集团有限公司 | 一种除尘低噪音型密集架 |
| CN115163206A (zh) * | 2022-07-29 | 2022-10-11 | 中国航发沈阳发动机研究所 | 一种具有防错功能的轮盘 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3165294A (en) * | 1962-12-28 | 1965-01-12 | Gen Electric | Rotor assembly |
| FR2504975A1 (fr) * | 1981-04-29 | 1982-11-05 | Rolls Royce | Dispositif de fixation des aubes de rotors de turbomachines |
| FR2571099A1 (fr) * | 1984-10-01 | 1986-04-04 | Gen Electric | Agencement de montage d'aubes. |
| EP0695856A1 (fr) * | 1994-08-03 | 1996-02-07 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Disque de compresseur de turbomachine muni d'une gorge circulaire asymétrique |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB549109A (en) * | 1941-04-04 | 1942-11-06 | William Needham | Improvements in and applicable to knitting machines and the production of fabric thereon |
| US4460315A (en) * | 1981-06-29 | 1984-07-17 | General Electric Company | Turbomachine rotor assembly |
| SU1460430A1 (ru) * | 1987-06-30 | 1989-02-23 | Предприятие П/Я Р-6654 | Рабочее колесо осевого вентил тора |
| DE59200524D1 (de) * | 1991-06-28 | 1994-10-27 | Asea Brown Boveri | Laufschaufelbefestigung. |
| US5271718A (en) * | 1992-08-11 | 1993-12-21 | General Electric Company | Lightweight platform blade |
-
2003
- 2003-07-07 FR FR0308295A patent/FR2857405B1/fr not_active Expired - Fee Related
-
2004
- 2004-06-22 CA CA2472299A patent/CA2472299C/fr not_active Expired - Lifetime
- 2004-06-30 US US10/879,744 patent/US7029237B2/en not_active Expired - Lifetime
- 2004-07-02 JP JP2004196665A patent/JP4047837B2/ja not_active Expired - Lifetime
- 2004-07-06 DE DE602004013400T patent/DE602004013400T2/de not_active Expired - Lifetime
- 2004-07-06 UA UA20040705399A patent/UA85164C2/ru unknown
- 2004-07-06 ES ES04291705T patent/ES2305684T3/es not_active Expired - Lifetime
- 2004-07-06 EP EP04291705A patent/EP1496206B1/fr not_active Expired - Lifetime
- 2004-07-06 RU RU2004120675/06A patent/RU2346165C2/ru active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3165294A (en) * | 1962-12-28 | 1965-01-12 | Gen Electric | Rotor assembly |
| FR2504975A1 (fr) * | 1981-04-29 | 1982-11-05 | Rolls Royce | Dispositif de fixation des aubes de rotors de turbomachines |
| FR2571099A1 (fr) * | 1984-10-01 | 1986-04-04 | Gen Electric | Agencement de montage d'aubes. |
| EP0695856A1 (fr) * | 1994-08-03 | 1996-02-07 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" | Disque de compresseur de turbomachine muni d'une gorge circulaire asymétrique |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1726786A1 (fr) * | 2005-05-26 | 2006-11-29 | Snecma | Roue aubagée de rotor |
| FR2886336A1 (fr) * | 2005-05-26 | 2006-12-01 | Snecma Moteurs Sa | Perfectionnement a une roue aubagee de rotor pour renforcer le verrouillage des aubes |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2346165C2 (ru) | 2009-02-10 |
| FR2857405A1 (fr) | 2005-01-14 |
| CA2472299C (fr) | 2012-10-16 |
| CA2472299A1 (fr) | 2005-01-07 |
| JP2005030395A (ja) | 2005-02-03 |
| UA85164C2 (ru) | 2009-01-12 |
| DE602004013400D1 (de) | 2008-06-12 |
| RU2004120675A (ru) | 2006-01-10 |
| US20050008491A1 (en) | 2005-01-13 |
| EP1496206B1 (fr) | 2008-04-30 |
| ES2305684T3 (es) | 2008-11-01 |
| US7029237B2 (en) | 2006-04-18 |
| FR2857405B1 (fr) | 2005-09-30 |
| JP4047837B2 (ja) | 2008-02-13 |
| DE602004013400T2 (de) | 2009-05-07 |
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