EP0854268B1 - Disque aubagé à aubes tripodes - Google Patents
Disque aubagé à aubes tripodes Download PDFInfo
- Publication number
- EP0854268B1 EP0854268B1 EP98400062A EP98400062A EP0854268B1 EP 0854268 B1 EP0854268 B1 EP 0854268B1 EP 98400062 A EP98400062 A EP 98400062A EP 98400062 A EP98400062 A EP 98400062A EP 0854268 B1 EP0854268 B1 EP 0854268B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blades
- disc
- grooves
- feet
- blade roots
- 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.)
- Expired - Lifetime
Links
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 a bladed disc with tripod vanes.
- Machines such as gas turbines all include bladed discs to constitute their turbines and compressors. If we put aside the discs made in one piece with the blades they carry, which are few, we find that concrete achievements of assembling the blades at discs are very diverse but fall into two fairly clearly separated families: that of the disks and the circular groove discs.
- a tool broaching performs axial direction grooves or oblique, straight or in an arc across the width of the outer crown of the disc; the dawn are introduced around the disc by sliding their foot along the pinouts, and the interlocking of feet with bulbous section in pinouts prohibited tear off the blades.
- An example is illustrated in Figure 6, where blades 20 have their curvilinear feet and plugged into form 22 pinouts complementary, established around the edge of a crown outer 23 of the disc, attached to a central part 24 narrower of the disc.
- a single groove extends over the circumference of the outer crown of the disc and the feet of the blades are all engaged.
- the invention constitutes an improvement from mounting blades to a disc within the second family. It retains the advantage inherent in it good uniformity of effort while allowing to transmit significantly higher efforts than with known achievements.
- the bladed disc according to the invention is dug with three circular grooves in which penetrate respectively, for each of the blades, three blade roots located at different angles to the disc, and in addition, these feet are directed on the axis of disc rotation; moreover, the grooves have different sections and the blade roots also have different sections. It may be advantageous to place the grooves at different distances from the axis of disc rotation, always to allow a transmission of high forces depending on the shape (cylindrical or conical) of the disc.
- shock absorbers can be between the blade roots and the bottoms of the grooves to reduce vibrations.
- the document FR-2375440-A describes tripod vanes, but which are mounted in helical grooves: it concerns therefore the first family of achievements.
- the device of document US 2,639,119 A belongs to the same family of achievements as the invention, and it describes multi-groove blades (at least four in the illustrated embodiments) in which respective feet of the disc are engaged and retained by forging. But the grooves and feet all have the same section, and their number is arbitrary and depends the width of the blades and the disc. Such a provision does not allow to adjust the efforts and stresses on the bonding surface between dawn and the disc, and the number of feet implies that they have all a small section. This double disadvantage forbidden to transmit the same efforts as with the invention between the blades and the disc.
- the document US 1,638,639 A deserves the same comments.
- the disc according to the invention carries the reference 1 in the figures, and we can distinguish there a thin and flat central part 2 and at the edge of which is connected to an outer crown 3 in which have been dug a central groove 4 and two lateral grooves 5 and 6 flanking the previous one, all three circular and opening outwards crown 3.
- the three grooves 4, 5 and 6 are narrow at their opening portion to hold respectively three feet 7, 8 and 9 of bulbous shape of blades 10.
- the disc 1 rotates by driving the crown blades 10, the latter are subjected, under the effect centrifugal, aerodynamic and vibratory forces, to mainly radial forces which are transmitted to disc 1 by three components F7, F8 and F9 passing respectively by the feet of the same number. It is thus possible to better distribute the efforts in the disc 1 only if we only had groove 4 central and its 7 foot, as in the designs earlier.
- FIG 2 shows that the camber of the blades 10 requires placing feet 7, 8 and 9 at different angles of the circumference of the disc 1. But as seen in Figure 3, feet 7, 8 and 9 are not parallel but directed on the axis of disc X rotation 1, which favors standardization of constraints.
- FIG. 4 illustrates a method of mounting the blades 10: notches 11 of radial direction are formed on the outer ring 3 so as to locally widen grooves 4, 5 and 6 for make it wider than feet 7, 8 and 9 and allow to insert them.
- the blade insertion movement can be purely radial or, as shown here, it can be produced by a rotation of dawn 10 around a hinge point 12 defined by the contact of a edge of dawn 10 and crown 3. In all in this case, the blades 10 are locked in place sliding feet 7, 8 and 9 in their groove 4, 5 and 6 after insertion to make them leave the notch sector 11.
- Figure 5 shows an element cushioning 13 made of elastic material and of arcuate shape, whose ends 14 rest on the bottom 15 of a any of grooves 4, 5 and 6 and the part of which median 16 is engaged under the foot of a blade 10, and kept under this foot despite the risk of movement of element 13 along the groove thanks to two edges 17 which pinch the blade root. Vibrations of radial direction to which the blade 10 is subjected have the effect of crushing and releasing element 13 and to give him the opportunity to dispel energy.
- a boss 18 is advantageously provided under the middle part 16 for abutting against the bottom 15 of the groove when element 13 has been crushed a limit that one wishes not to exceed.
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)
Description
- la figure 1 est une vue en coupe diamétrale d'un mode de réalisation de l'invention,
- la figure 2 est une autre vue de ce mode de réalisation, le disque étant vu de l'extérieur en direction radiale ;
- la figure 3 est une triple vue en coupe transversale des pieds d'aubes et du disque, prise selon la ligne III-III de la figure 2 ;
- la figure 4 illustre un mode d'insertion des aubes ;
- la figure 5 représente un élément du montage ;
- et la figure 6 est une vue de l'art antérieur.
Claims (4)
- Disque (1) aubagé garni d'une couronne extérieure d'aubes (10), caractérisé en ce qu'il est creusé de trois rainures circulaires (4, 5, 6) dans lesquelles pénètrent respectivement, pour chacune des aubes (10), trois pieds (7, 8, 9) d'aube situés à des angles différents du disque et dirigés sur un axe de rotation (X) du disque, et en ce que les rainures (4, 5, 6) ont des sections différentes et les pieds d'aube (7, 8, 9) ont aussi des sections différentes.
- Disque aubagé selon la revendication 1, caractérisé en ce que les rainures sont situées à des distances différentes de l'axe de rotation du disque.
- Disque aubagé selon la revendication 1, caractérisé en ce que des amortisseurs (13) se trouvent entre les pieds (10) d'aube et des fonds (15) de rainure.
- Disque aubagé selon la revendication 3, caractérisé en ce que les amortisseurs consistent en des lames arquées et élastiques ayant des extrémités reposant sur les fonds de rainure, une partie médiane (16) reposant sous les pieds d'aube, et un bossage (18) d'arrêt de débattement attaché sous la partie médiane (16) et dirigé vers les fonds de rainure.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9700383 | 1997-01-16 | ||
FR9700383A FR2758364B1 (fr) | 1997-01-16 | 1997-01-16 | Disque aubage a aubes tripodes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0854268A1 EP0854268A1 (fr) | 1998-07-22 |
EP0854268B1 true EP0854268B1 (fr) | 2000-09-13 |
Family
ID=9502643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98400062A Expired - Lifetime EP0854268B1 (fr) | 1997-01-16 | 1998-01-15 | Disque aubagé à aubes tripodes |
Country Status (6)
Country | Link |
---|---|
US (1) | US5919032A (fr) |
EP (1) | EP0854268B1 (fr) |
JP (1) | JPH10205304A (fr) |
CA (1) | CA2227521A1 (fr) |
DE (1) | DE69800296T2 (fr) |
FR (1) | FR2758364B1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9814567D0 (en) * | 1998-07-07 | 1998-09-02 | Rolls Royce Plc | A rotor assembly |
US6736602B2 (en) * | 2002-07-31 | 2004-05-18 | United Technologies Corporation | Hollow fan hub under blade bumper |
FR2856105B1 (fr) * | 2003-06-16 | 2007-05-25 | Snecma Moteurs | Amelioration de la capacite de retention d'une aube a attache marteau dissymetrique a l'aide des raidisseurs de plates-formes |
DE10337868A1 (de) * | 2003-08-18 | 2005-03-17 | Mtu Aero Engines Gmbh | Rotor für eine Gasturbine sowie Gasturbine |
DE10357134A1 (de) * | 2003-12-06 | 2005-06-30 | Alstom Technology Ltd | Rotor für einen Verdichter |
US20110158814A1 (en) * | 2009-12-31 | 2011-06-30 | General Electric Company | Turbine engine rotor blades and rotor wheels |
US10465537B2 (en) * | 2016-05-27 | 2019-11-05 | General Electric Company | Margin bucket dovetail radial support feature for axial entry buckets |
GB201800732D0 (en) | 2018-01-17 | 2018-02-28 | Rolls Royce Plc | Blade for a gas turbine engine |
GB201811205D0 (en) * | 2018-07-09 | 2018-08-29 | Rolls Royce Plc | Blade for a gas turbine engine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US846739A (en) * | 1906-07-21 | 1907-03-12 | Gen Electric | Bucket for elastic-fluid turbines. |
US1500787A (en) * | 1922-09-20 | 1924-07-08 | Gen Electric | Turbine rotor |
US1638639A (en) * | 1923-09-18 | 1927-08-09 | Westinghouse Electric & Mfg Co | Turbine blading |
US2327839A (en) * | 1940-03-26 | 1943-08-24 | Bbc Brown Boveri & Cie | Turbine construction |
US2639119A (en) * | 1947-11-14 | 1953-05-19 | Lockheed Aircraft Corp | Rotor blade attachment means and method |
US2751189A (en) * | 1950-09-08 | 1956-06-19 | United Aircraft Corp | Blade fastening means |
US2847187A (en) * | 1955-01-21 | 1958-08-12 | United Aircraft Corp | Blade locking means |
US2928651A (en) * | 1955-01-21 | 1960-03-15 | United Aircraft Corp | Blade locking means |
US3014695A (en) * | 1960-02-03 | 1961-12-26 | Gen Electric | Turbine bucket retaining means |
US3282561A (en) * | 1964-12-14 | 1966-11-01 | Associated Electric Ind Ltd | Turbine rotors |
US3383094A (en) * | 1967-01-19 | 1968-05-14 | Gen Electric | Rotor blade locking means |
US3597112A (en) * | 1970-02-02 | 1971-08-03 | Gen Electric | Compressor-blade-retaining means |
CH572155A5 (fr) * | 1974-05-27 | 1976-01-30 | Bbc Sulzer Turbomaschinen | |
DE2441249C3 (de) * | 1974-08-28 | 1979-01-04 | Motoren- Und Turbinen-Union Muenchen Gmbh, 8000 Muenchen | Axiallaufrad für hochtourige Turbomaschinen |
FR2375440A1 (fr) * | 1976-12-23 | 1978-07-21 | Europ Turb Vapeur | Rotor de turbine axiale |
US4101245A (en) * | 1976-12-27 | 1978-07-18 | United Technologies Corporation | Interblade damper and seal for turbomachinery rotor |
US4767274A (en) * | 1986-12-29 | 1988-08-30 | United Technologies Corporation | Multiple lug blade to disk attachment |
-
1997
- 1997-01-16 FR FR9700383A patent/FR2758364B1/fr not_active Expired - Fee Related
-
1998
- 1998-01-07 US US09/003,635 patent/US5919032A/en not_active Expired - Fee Related
- 1998-01-14 CA CA002227521A patent/CA2227521A1/fr not_active Abandoned
- 1998-01-15 EP EP98400062A patent/EP0854268B1/fr not_active Expired - Lifetime
- 1998-01-15 DE DE69800296T patent/DE69800296T2/de not_active Expired - Fee Related
- 1998-01-16 JP JP10006885A patent/JPH10205304A/ja not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
EP0854268A1 (fr) | 1998-07-22 |
FR2758364A1 (fr) | 1998-07-17 |
DE69800296T2 (de) | 2001-03-29 |
FR2758364B1 (fr) | 1999-02-12 |
DE69800296D1 (de) | 2000-10-19 |
US5919032A (en) | 1999-07-06 |
JPH10205304A (ja) | 1998-08-04 |
CA2227521A1 (fr) | 1998-07-16 |
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