EP4229280A1 - Module de turbomachine comportant des plaques de verrouillage de paires de goujons - Google Patents
Module de turbomachine comportant des plaques de verrouillage de paires de goujonsInfo
- Publication number
- EP4229280A1 EP4229280A1 EP21805564.8A EP21805564A EP4229280A1 EP 4229280 A1 EP4229280 A1 EP 4229280A1 EP 21805564 A EP21805564 A EP 21805564A EP 4229280 A1 EP4229280 A1 EP 4229280A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- orifices
- intermediate section
- flange
- axis
- orifice
- 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.)
- Pending
Links
- 230000000295 complement effect Effects 0.000 claims description 7
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- 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
- F01D25/243—Flange connections; Bolting arrangements
-
- 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
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
-
- 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
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
- F05D2260/31—Retaining bolts or nuts
Definitions
- the invention relates to the field of turbomachines and more particularly to the turbomachine modules that constitute them.
- a turbomachine is produced, during its final assembly, by an assembly of modules comprising compressor, combustion chamber and turbine modules which are assembled with each other.
- Each module comprises a fixed element, or stator, receiving a rotatable element, or rotor, carrying compressor or turbine blades depending on whether the module is a compressor or turbine module.
- the stator is made up of an assembly of tubular casings which include, for their fixing, annular flanges assembled to each other by bolting.
- annular flanges of the tubular casings are assembled with each other by studs and nuts.
- first annular flange of a first tubular casing with a second annular flange of a second tubular casing is carried out by means of a series of studs which are received in a fixed manner in the first annular flange, and more particularly in captive nuts which are fixed to the back of this first annular flange in order to be integral with it.
- the assembly is also carried out by means of a series of corresponding nuts tightened on the back of the second annular flange. More particularly, the first flange, carrying studs, receives the second flange whose bores are threaded onto the studs, then the second annular flange is bolted onto the first by means of nuts which are received at the end of the studs.
- This assembly is subjected in operation to significant vibrations and thermal stresses which subject the bolted connections to stresses which can lead to their loosening.
- the ends of the studs generally comprise an intermediate section of hexagonal shape intended to be immobilized in rotation.
- this intermediate section is immobilized in rotation with respect to the second flange by means of a substantially transverse locking plate, which comprises a hexagonal-shaped orifice received on the intermediate section of hexagonal shape, and a body extending transversely relative to the axis C, which is immobilized to prevent the rotation of said plate and that of the pin.
- the body has two radial tabs, which extend to the periphery of the second annular flange on which the two radial tabs are nested. Therefore, the body, which is immobilized with respect to the second annular flange, prohibits the rotation of the intermediate section of hexagonal shape of the stud, and consequently, the rotation of the stud.
- a ventilation sheet is generally interposed axially between the annular flanges, and this sheet is fixed to the second annular flange by means of screws whose ends project from an outer face of the second flange. The presence of these screws would make it necessary to carry out additional machining in such a plate or such a locking disc so that it can rest on the second flange.
- document US-2001/18399-A1 has proposed a locking plate trapping two angularly consecutive studs.
- a plate is not compatible with the aforementioned projecting screws.
- the invention overcomes the drawback of locking plates known from the state of the art by proposing a simplified locking plate which is immobilized by means of a common support between at least two studs.
- an aircraft turbomachine module comprising a first X-axis tubular casing, provided with a first annular flange, and a second X-axis tubular casing, provided with a second flange annular, assembled to the first annular flange by a plurality of C-axis studs parallel to the X axis, distributed around the X axis, each stud passing through the second flange, and comprising an end which projects from an external face of the second flange and which is capable of receiving a tightening nut, each stud further comprising an intermediate section of hexagonal shape, said turbomachine module comprising at least one locking plate applied to the second annular flange, which comprises a first orifice received on said intermediate section and of which at least two opposite walls cooperate with said intermediate section of hexagonal shape, said insert plate comprising a body extending transversely with respect to to the axis C, which is immobilized to prevent the rotation of the said plate and that of the
- each stud is received in a fixed manner in the first flange
- the opposite walls of the first and second orifices are parallel to a direction passing through the axes of the studs, and at least one stud can slide in at least the first and second orifices in said direction,
- first and second orifices is an open U-shaped orifice which opens at one end of the body and which comprises two bottom walls, complementary to two sides of the intermediate section of hexagonal shape, which connect the two opposite walls,
- the first and second orifices are identical and open opposite to each other at opposite ends of the body
- one of the first and second orifices is of hexagonal shape, complementary to the intermediate section of hexagonal shape of the stud,
- At least one of the first and second orifices has the shape of an oblong hole delimited by the two opposite walls and, at each of its ends, by a junction wall,
- one of the first and second orifices is hexagonal in shape and the other of the first and second orifices is in the shape of an oblong hole, the orifices being arranged at opposite ends of the body,
- first and second orifices are hexagonal in shape and the other of the first and second orifices is an orifice open in U-shaped, the orifices being arranged at opposite ends of the body.
- Figure 1 is a sectional view of the assembly of a first and a second tubular casing
- Figure 2 is a perspective view of a locking plate according to the state of the art resting on a second annular flange and received on a stud of a first annular flange,
- Figure 3 is a perspective view of the assembly of the first and second annular flanges
- Figure 4 is a perspective view of the second annular flange, bare, equipped with the only annular sheet,
- Figure 5 is a front view of a first embodiment of the invention comprising a locking plate of two studs comprising two U-shaped open holes,
- Figure 6 is a front view of a second embodiment of the invention having a locking plate of two studs having a hexagonal hole and a hole having an oblong hole.
- a turbomachine module comprises a rotor, generally carrying blades (not shown) surrounded by a stator consisting of an assembly of tubular casings assembled together.
- a stator consisting of an assembly of tubular casings assembled together.
- such an assembly comprises a series of tubular casings associated with different stages of a high pressure turbine, an inter-turbine casing TCF (acronym Anglo-Saxon for Turbine Center Frame), and a series of tubular casings associated with different stages of a low pressure turbine.
- TCF cronym Anglo-Saxon for Turbine Center Frame
- Figure 1 illustrates, in a non-limiting way of the invention, the detail of the assembly of a first tubular casing 12 of axis X, which here is a low pressure turbine casing, with a tubular casing 14, also of axis, which is a TCF inter-turbine casing. It will be understood that this provision is not limiting of the invention and that the invention could relate to the assembly of two tubular casings whatever they may be.
- the first tubular casing 12 is provided with a first annular flange 16, and the second tubular casing 14 is provided with a second annular flange 18, assembled to the first annular flange 16 via a plurality of dowel pins.
- axes C parallel to the axis X, distributed around the axis X.
- the first annular flange 16 is for example centered in the second annular flange 18 by means of an annular flange 20 which extends from the second flange 18 and which receives the periphery of the first flange 16.
- Figure 1 there is shown a single stud 24.
- Each stud 24 is received in a fixed manner in the first flange 16. It could for example be received in a blind thread of the first flange 16. However, preferably, the stud 24 is received in a prisoner nut 26. It crosses the first and second flanges, and has an end 28 projecting from a face 30 of the second flange 18. The stud 24 receives at its end 28 a clamping nut 32, shown in Figures 1 and 3.
- the pin 24 further comprises an intermediate section 34 of polygonal shape, which is intended to allow the immobilization of the pin 24 in rotation.
- an intermediate section 34 of hexagonal shape is shown, but it will be understood that this configuration is not limiting of the invention and that it could be for example a fluted intermediate section or section square.
- the turbomachine module comprises at least one locking plate 36, which is applied to the second annular flange 18 and which is attached to each pin 24 .
- this locking plate 36 has a first orifice 38, which is received on said intermediate section 34 of the pin 24 and which is traversed by the latter.
- This first orifice 38 comprises at least two opposite walls 58 which cooperate with the intermediate section 34 of hexagonal shape.
- the orifice 38 is shaped in the form of an orifice 38 of polygonal shape, here hexagonal, which is complementary to the section intermediate 34 of polygonal shape, and which is fitted on said intermediate section 34.
- the orifice 38 therefore comprises three pairs of opposite walls 58 corresponding to the hexagons of the hexagonal shape.
- the locking plate 36 also comprises at least one body 40, extending transversely relative to the axis C, which is immobilized to prevent the rotation of the locking plate 36 and therefore that of the pin 24.
- the body 40 comprises two curved lugs 42 which are intended to rest on the periphery 44 of the second annular flange 18.
- the turbomachine module may also comprise, as illustrated in FIG. 1, a support plate 45 which is interposed on the stud 24 between the locking plate 36 and the nut 32.
- each stud 24 is therefore immobilized in rotation by means of a locking plate 36. It is therefore necessary to use as many locking plates 36 as studs 24.
- This configuration increases the cost of assembly of the turbomachine module, involving numerous assembly operations.
- such a locking plate 36 is generally produced by machining so that its curved lugs 42 cooperate with the periphery 44 of the second annular flange 18 and it is particularly expensive for this purpose.
- the invention overcomes this drawback by proposing a simplified locking plate and using another support.
- the turbomachine module comprises as previously a locking plate 36, which is applied to the second annular flange 18 and which is attached to each stud 24a.
- This locking plate 36 comprises a first orifice 38a, received on the intermediate section 34a and of which at least two opposite walls 58a cooperate with said intermediate section 34 of hexagonal shape,
- the locking plate 36 comprises as before at least one body 40, extending transversely with respect to the axis C, which is immobilized to prevent the rotation of the locking plate 36 and consequently, that of the pin 24a.
- each plate 36 is attached to the stud 24a but also to an immediately adjacent pin 24b.
- the body 40 comprises, opposite the first orifice 38a, a second orifice 38b which is received on an intermediate section 34b of the immediately adjacent pin 24b.
- the second orifice 38b comprises at least two opposite walls 58b which cooperate with the intermediate section 34b of hexagonal shape of the pin 24b immediately adjacent.
- the turbomachine module may include an annular plate 46 which is mounted between the first and second flanges 16,18.
- This sheet 46 acts as an insulation sheet.
- the sheet 46 fixed to at least the second flange 18 by screws 48 of axes B which are parallel to the axis X, and are distributed around the axis X.
- Each screw 48 is arranged angularly between two consecutive studs. In Figure 4, we can thus see a screw 48 arranged between two holes 50 of the second flange 18 intended to allow the passage of the studs 24.
- Each screw 48 has one end 52 projecting from the outer face 30 of the second flange 18.
- each locking plate 36 being independent, the projecting ends 52 of the screws 48 do not interfere with these locking plates 36.
- each added plate 36 comprises at least one recess 54 in which the projecting end 52 of the screw 48 is received with play. This configuration makes it possible to ensure plate 36 is fitted around the end of the screw.
- plate 36 is adaptable to different center distances of studs 24a, 24b. It is thus possible to equip turbomachinery modules of different sizes with plates 36 of the same size.
- the opposite walls 58a, 58b of the first and second orifices 38a, 38b are parallel to a direction T passing through the axes C of the studs 24a, 24b and at least one of the studs 24a, 24b can slide in at least one first and second orifices 38a, 38b in said direction T.
- At least one of the first and second orifices here in this case the two orifices 38a, 38b are U-shaped open orifices each of which opens at a corresponding end 60a, 60b of the body 40.
- the orifices 38a, 38b open out at opposite ends 60a and 60b.
- the orifices 38a, 38b each comprise two bottom walls 62a, 32b, complementary to two sections of the intermediate section 34a, 34b of hexagonal shape, which connect the two opposite walls 58a, 58b.
- Plate 36 can therefore immobilize at least two and up to four of the hexagons of each hexagonal intermediate section 34a, 34b.
- first and second orifices 38a, 38b are identical and they open out opposite one another at the opposite ends 60a, 60b of the body 40.
- the plate 36 can therefore be arranged on any pair of studs 24a, 24b whose center distance is at least equal to a minimum distance according to which the intermediate sections 34a bear against the walls 62a, 62b, and for any greater center distance that the studs 24a, 24b do not escape from the orifices 38a, 38b.
- the plate 36 therefore has a sliding latitude in the direction T but is immobilized by the tightening of the nuts 32.
- At least one of the first or second orifices 38a or 38b may be hexagonal in shape, complementary to the intermediate section 34a or 34b of hexagonal shape of the stud 24a, 24b, while the other orifice offers a latitude of movement in the direction T in order to allow adaptability to different center distances.
- the other orifice can thus be an open U-shaped orifice as described previously with reference to FIG. 5.
- At least one of the first and second orifices 38a, 38b can also have the shape of an oblong hole delimited by the two opposite walls and, at each of its ends, by a junction wall.
- an orifice 38b having the shape of an oblong hole delimited by the two opposite walls 58b and, at each of its ends, by an arcuate junction wall 64b.
- FIG. 6 a second embodiment of the invention has been shown comprising a first orifice 38a of hexagonal shape and a second orifice 38b in the shape of an oblong hole, the orifices 38a, 38b being arranged at opposite ends of the body 40.
- the body 40 could also comprise two orifices 38a, 38b in the form of oblong holes, as long as these orifices comprise opposite walls 58a, 58b parallel to the direction T passing through the axes C of the studs 24a, 24b.
- the invention therefore makes it possible to immobilize the studs 24a, 24b connecting the tubular casings in rotation by reducing the number of locking plates.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Plates (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2010726A FR3115320B1 (fr) | 2020-10-19 | 2020-10-19 | Module de turbomachine comportant des plaques de verrouillage de paires de goujons |
PCT/FR2021/051778 WO2022084604A1 (fr) | 2020-10-19 | 2021-10-13 | Module de turbomachine comportant des plaques de verrouillage de paires de goujons |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4229280A1 true EP4229280A1 (fr) | 2023-08-23 |
Family
ID=74125423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21805564.8A Pending EP4229280A1 (fr) | 2020-10-19 | 2021-10-13 | Module de turbomachine comportant des plaques de verrouillage de paires de goujons |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230392519A1 (fr) |
EP (1) | EP4229280A1 (fr) |
CN (1) | CN116324129A (fr) |
FR (1) | FR3115320B1 (fr) |
WO (1) | WO2022084604A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60034303T2 (de) | 2000-01-31 | 2008-01-03 | Solvay (Société Anonyme) | Verfahren zur Oxidation mit einem Katalysator von einer Antimontrifluorid und Siliziumdioxid enthaltenden Zusammensatzung |
US6641326B2 (en) * | 2001-12-21 | 2003-11-04 | General Electric Company | Removable stud for joining casing flanges |
JP5869051B2 (ja) * | 2014-06-09 | 2016-02-24 | 三菱日立パワーシステムズ株式会社 | 回転機械及び回転機械の組立方法、回転機械のメンテナンス方法 |
FR3039230B1 (fr) * | 2015-07-22 | 2017-07-21 | Snecma | Assemblage comprenant un goujon de fixation verrouille |
FR3090052B1 (fr) * | 2018-12-12 | 2020-11-27 | Safran Aircraft Engines | Assemblage à pièces vissées auto-freinantes |
-
2020
- 2020-10-19 FR FR2010726A patent/FR3115320B1/fr active Active
-
2021
- 2021-10-13 WO PCT/FR2021/051778 patent/WO2022084604A1/fr unknown
- 2021-10-13 CN CN202180071097.3A patent/CN116324129A/zh active Pending
- 2021-10-13 US US18/249,230 patent/US20230392519A1/en active Pending
- 2021-10-13 EP EP21805564.8A patent/EP4229280A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
US20230392519A1 (en) | 2023-12-07 |
WO2022084604A1 (fr) | 2022-04-28 |
FR3115320B1 (fr) | 2023-05-19 |
FR3115320A1 (fr) | 2022-04-22 |
CN116324129A (zh) | 2023-06-23 |
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