WO2014096647A1 - Extension de carter intermediaire a conception amelioree - Google Patents
Extension de carter intermediaire a conception amelioree Download PDFInfo
- Publication number
- WO2014096647A1 WO2014096647A1 PCT/FR2013/053082 FR2013053082W WO2014096647A1 WO 2014096647 A1 WO2014096647 A1 WO 2014096647A1 FR 2013053082 W FR2013053082 W FR 2013053082W WO 2014096647 A1 WO2014096647 A1 WO 2014096647A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- extension
- nacelle
- sectors
- angular
- annular
- Prior art date
Links
- 230000014759 maintenance of location Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 16
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000003380 propellant Substances 0.000 claims 1
- 230000000295 complement effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D29/00—Power-plant nacelles, fairings, or cowlings
- B64D29/06—Attaching of nacelles, fairings or cowlings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/20—Mounting or supporting of plant; Accommodating heat expansion or creep
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/06—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type with front fan
-
- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/36—Application in turbines specially adapted for the fan of turbofan engines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present invention relates to a propulsion unit for an aircraft, of the type comprising a turbomachine, a nacelle enveloping the turbomachine, as well as an attachment pylon provided with a rigid structure and means for fastening the turbomachine on the rigid structure.
- the invention relates to an intermediate casing extension of the turbomachine, intended to provide the interface between the intermediate casing and thrust reverser covers of the nacelle.
- the invention applies more particularly to a propulsion unit comprising a turbojet engine, preferably a double-flow engine.
- Mounting Structure "), or” pylon “or” engine pylon “ allows to suspend the turbojet engine below the wing of the aircraft, or to mount this turbojet engine over this same wing, or else to report it at the rear of the fuselage. It is in fact intended to constitute the link interface between a turbojet engine and a given structural part of the aircraft. It makes it possible to transmit to the structure of this aircraft the forces generated by its associated turbojet, and also authorizes the routing of fuel, electrical, hydraulic and air systems between the engine and the aircraft.
- the nacelle is conventionally equipped with several hoods enclosing the turbojet and allowing access to the latter in the open position, these hoods being known under the names of fan cowls and thrust reverser cowls, the latter being articulated on the primary structure of the rigging mast.
- the turbojet engine comprises a fan casing extended rearwardly by an intermediate casing, comprising an outer shell and a transverse front flange and a rear transverse flange parallel and disposed radially inwardly relative to said outer shell, said intermediate casing comprising in addition, structural arms angularly distributed and extending radially between the front and rear flanges to the outer shell.
- the secondary flow passes through the annular space between the inner and outer ferrules of the intermediate casing.
- the mere penetration of the rib into the groove ensures easy and quick opening of the inverter covers articulated on the mast, this opening being for example made for the implementation of maintenance operations of the aircraft parked at the mast. ground.
- a disadvantage relative to conventional solutions lies in the fact that the annular groove, continuous or interrupted along the circumference of the extension, is made within one and the same annular piece, that it is necessary to change completely in case of degradation of a part of the receiving groove of the covers.
- This disadvantage is extremely disadvantageous, especially since it has been found that the annular groove is generally solicited by the covers disproportionately along the latter, implying the appearance of very localized wear areas.
- Such a solution is for example known from FR 2 925 120.
- the annular groove is thus recomposed using angular sectors arranged end-to-end, and each fixedly fixed by bolts on a joining ferrule, itself mounted. on the outer shell of the intermediate casing.
- these nacelle hood retention means may for example be formed by a retaining flange radially outwardly projecting from said joining ferrule.
- the invention therefore aims to at least partially overcome the disadvantages mentioned above, relating to the achievements of the prior art.
- the invention firstly relates to an intermediate casing extension for aircraft turbomachine, intended to project downstream from an outer shell of said intermediate casing, said extension comprising a downstream portion annular connecting means forming retaining means for receiving nacelle covers, said annular downstream connecting portion comprising at least a first angular sector.
- said extension comprises a body made in one piece comprising a joining ferrule and at least a second angular sector of said annular downstream connecting portion, said first angular sector being attached to said extension body .
- the casing extension comprises a plurality of first angular sectors as well as a plurality of second angular sectors, the set of second angular sectors extending over at least 80% of the circumference of the body.
- the invention is mainly advantageous in that the joining ferrule is made in one piece with one or more angular sectors of the annular downstream portion of the extension defining the groove. These sectors, said second angular sectors, thus no longer need to be reported fixed by bolts on the joining ferrule, and the overall mass of the shell is advantageously reduced.
- the tolerances obtained are better than in the solution of the document FR 2 925 120, where the parts are stacked.
- the invention retains the advantage that when one or more first angular sectors must be replaced, it is no longer necessary to change the entire extension, but only the first angular sector or sectors concerned.
- segmentation of the nacelle hood retention means advantageously makes it possible to reduce the duration of the maintenance operations performed on the extension, and also provides a saving in material. As the wear of these cap retention means is generally located at predetermined locations, it is sufficient to implant the first sectors, easily exchangeable.
- the first and second angular sectors may advantageously differ from each other, in terms of design and / or material, depending on the level of stress to which they are intended to be subjected.
- the parts of means of annular retention located opposite these control means are generally the most solicited. Adequate material and / or design can then be adopted to achieve the angular sector (s) corresponding to the highly stressed parts, so that they are more resistant to wear.
- the highly stressed parts of the groove are preferably made with the first exchangeable angular sectors.
- the casing extension comprises a plurality of first angular sectors as well as a plurality of second angular sectors, the set of second angular sectors extending over at least 80% of the circumference of the body, it It follows that the rest of the circumference is completed, entirely or partially, by the first angular sectors.
- the first angular sectors are mounted by screws on the body, in recesses formed between two second directly consecutive sectors of said body.
- said first angular sectors are made of a first material
- the second angular sectors are made of a second material different from the first.
- the first material is titanium or one of its alloys
- the second material is aluminum or one of its alloys. More generally, the first material is more resistant than the second, used for the second sectors arranged at the most stressed locations of the extension of the intermediate casing.
- each first and second angular sector comprises a portion of the retention means, this portion extending over the same angular amplitude as that of the sector concerned.
- each sector could have a portion of the retention means on a smaller amplitude than the sector concerned, without departing from the scope of the invention.
- said retention means are formed by a groove open radially outwardly, intended to receive the nacelle covers.
- said retention means are formed by a radially outwardly projecting retention flange, said retention flange being preferably provided for retaining the nacelle hoods with the aid of a holding structure enclosing the retention flange and a portion of said nacelle hoods.
- the invention also relates to a turbomachine for an aircraft, preferably a turbojet, comprising an intermediate casing equipped at the downstream end of its outer shell of an extension as described above.
- the joining junction of the body is equipped with an annular collar for fixing the body on the downstream end of the outer shell of the intermediate casing.
- the invention also relates to a propulsion unit for aircraft comprising such a turbomachine, and a nacelle comprising pod covers cooperating with the retention means.
- the propulsion unit also comprises a latching mast of the turbomachine, comprising a rigid structure as well as means for fastening the turbomachine to said rigid structure, said nacelle hoods being hinged to said rigid structure.
- a latching mast of the turbomachine comprising a rigid structure as well as means for fastening the turbomachine to said rigid structure, said nacelle hoods being hinged to said rigid structure.
- FIG. 1 shows a schematic side view of a propulsion system for aircraft according to the present invention, the nacelle having been removed for reasons of clarity;
- FIG. 2 represents a partial view in more detailed section of the assembly shown in FIG. 1, and taken along the line 11 of the same figure;
- FIG. 3 shows a partial perspective view of a thrust reverser cover belonging to the nacelle shown in Figure 2;
- FIG. 4 represents a perspective view of a thrust reverser system intended to equip the hood shown in FIG. 3;
- FIG. 5 shows a schematic view of the thrust reverser system shown in the actuated configuration
- FIG. 6 shows an enlarged partial view in schematic section of that shown in Figure 2, showing the cooperation between the intermediate casing extension and one of the nacelle covers;
- Fig. 7 is a perspective view of the extension shown in Fig. 2, according to a first preferred embodiment of the present invention.
- FIGS. 8a and 8b show enlarged perspective views of an upper portion of the extension shown in Figure 7, respectively seen from the rear and from the front of this extension;
- Fig. 9 is an exploded perspective view of the extension portion shown in Figs. 8a and 8b;
- FIGS. 10 and 11 respectively represent sectional views taken along lines X-X and XI-XI of FIG. 7;
- Fig. 12 is a perspective view of the extension shown in Fig. 2, according to a second preferred embodiment of the present invention.
- FIG. 13 represents a sectional view of the extension shown in FIG. 12, to which the nacelle covers are assembled.
- Figs. 14 and 15 show sectional views taken along lines XIV-XIV and XV-XV of Fig. 13, respectively.
- FIG. 1 there is shown schematically a propulsion unit 1 for an aircraft according to a preferred embodiment of the present invention. invention, this assembly 1 being intended to be fixed under an aircraft wing (not shown).
- the propulsion unit 1 also called integrated propulsion system, is composed of a turbojet engine 2, a nacelle (not shown in this figure), and a latching mast 4 provided with attachment means 10 of the turbojet engine on this mast, these means preferably consisting of a front engine attachment 6a, a rear engine attachment 6b, as well as a device for taking up the thrust forces in the form of two connecting rods 8 (the one being masked by the other in Figure 1).
- the assembly 1 comprises another series of fasteners (not shown) to ensure the suspension of this assembly 1 under the wing of the aircraft.
- X is the longitudinal direction of the assembly 1 which is also comparable to the longitudinal direction of the turbojet engine 2, this direction X being parallel to a longitudinal axis 5 of the turbojet engine 2.
- Y is the direction transversely oriented relative to the propulsion unit 1 and also comparable to the transverse direction of the turbojet engine 2
- Z is the vertical or height direction, these three directions X, Y and Z being orthogonal. between them.
- the terms “front” and “rear” are to be considered with respect to a direction of advancement of the aircraft encountered following the thrust exerted by the turbojet engine 2, this direction being represented schematically by the arrow 7 Similarly, the terms “upstream” and “downstream” are to be considered with respect to a main direction of flow of the flows within the turbojet, direction opposite direction 7.
- the turbojet engine 2 has a generally conventional design, namely having at the front a fan casing 12, extended rearwardly by an intermediate casing 21.
- the intermediate casing 21 comprises an outer shell 23 located in the rear aerodynamic extension of the fan casing, as well as transverse flanges 25, 27 disposed radially inwardly relative to this outer shell 23, the intermediate casing 21 further comprising structural arms 17. angularly distributed and extending radially between the flanges 25, 27, to the outer shell 23 they contact.
- the turbojet also comprises a central casing 16, also called “core” casing, extending the intermediate casing 21 rearwards, from the rear transverse flange 27 to which it is connected. It is noted that the central casing extends to a rear end 19 of larger size, also called ejection housing.
- the outer shell 23 of the intermediate casing is extended downstream by an annular extension 30, also object of the present invention, the main purpose of which is to establish a connection between the outer shell 23 and the directly adjacent nacelle hoods downstream.
- the extension 30 will be presented in detail below.
- the front engine attachment 6a is interposed between the front end of the rigid structure 11, also called the primary structure, and the fan casing 12 or the outer shell 23 of the intermediate casing 21.
- the rear attachment 6b is interposed between the rigid structure 11 and the rear end 19 of the central casing 16.
- the two front engine attachments 6a, 6b are traversed by a median plane P oriented vertically and longitudinally, and passing through the The same plane P constitutes a plane of symmetry for the two connecting rods 8 of the thrust forces, on both sides of which they are, respectively.
- Each connecting rod 8 has a rear end articulated on a body of the rear engine attachment 6b and a front end connected to the transverse flange 27.
- nacelle 32 of the propulsion unit 1 forms a continuous aerodynamic outer surface, constituted by an air inlet 34, fan cowlings 36 , thrust reverser hoods 38, and a fixed rear hood 40, these elements being arranged adjacent from front to rear.
- the thrust reverser cowlings 38 delimit in known manner an annular channel of secondary flow 42, by means of external annular skins 44 and internal skins 46.
- each thrust reverser cowl 38 also referred to as the "rear” or “core” cowl, has the general shape of a half-cylinder, the upper end 48 being intended to be hinged to the structure rigid of the mast, and the lower end 50 being adapted to be locked at the lower end of the other cover 38, by conventional means.
- a housing 52 for the implementation of a thrust reverser system here taking the form of a pivot door system 54 shown in Figure 4.
- this system 54 form therefore a door capable of pivoting about the axis defined by the two facing pins 56 formed in the opening 52, respectively intended to be housed in the receiving orifices 58 of the door 54.
- control means such as a jack or the like is capable of ensuring the rotation of the gate 54, as shown in FIG. 5, in which the deployed jack 60 makes it possible to maintain the door 54 in a thrust reversal configuration.
- the air passing through the secondary channel 42 is forced out of the hood 38 because of the closure of this channel downstream by the inclined door 54, this extraction of air outside the nacelle substantially counter-current due to the inclination of the door 54, as shown by the arrow 62.
- the cylinder 60 has a front end connected to the frame of the housing 52 and a rear end connected to the door herself.
- the cover 38 cooperates with the extension 30.
- the extension 30 has an annular downstream connecting portion 64 forming an annular groove 66 radially outwardly, and receiving a ridge 68 of complementary shape carried by the cover 38, at the upstream end of its outer annular skin 44.
- the annular groove 66 is here a first way to perform a function of retention of hoods 38.
- the annular groove 66 preferably has a V-shaped cross-section, in which the rib 68 protruding radially inwards and also having a V-shaped section is housed.
- the cooperation between the rib 68 and the complementary groove 66 allows the transmission of the aerodynamic forces of the inverter cover 38 to the turbojet, in particular the axial forces, and even more particularly the axial thrust forces passing through the cylinders 60 when the doors 54 are deployed, as this is the case in Figure 5.
- FIG 7 there is shown an arrangement also referred to as "thrust reverser kit", integrating the extension 30 as radially outer end.
- This arrangement comprises, radially inwardly, a ring 70 intended to be centered on the axis 5 of the turbojet, and the purpose of which is to establish the mechanical connection with the inner annular skin 46 of the thrust reverser cowlings 38
- the ring 70 and the concentric annular extension 30 are rigidly connected to each other by means of radially arranged structural arms 72, for example four in number and spaced approximately 90 ° apart from one another. .
- the extension 30 intended to establish the mechanical connection with the outer annular skin 44
- the latter has an integral joining ferrule 74, whose front end in the form of an annular flange 75 allows the fixing by screw of the arrangement on the downstream end of the outer shell 23 of the intermediate casing.
- the joining ferrule 74 extending over 360 °, is part of an extension body 77 made in one piece, and incorporating angular sectors 76a. forming part of the annular downstream end of connection 64.
- the other part of the annular downstream end of connection 64 is formed by other angular sectors 76b preferably mounted by bolts on the body 77.
- the sectors 76b are called first angular sectors, while sectors 76a are referred to as second angular sectors.
- first and second angular sectors 76b, 76a together forming the annular downstream connecting portion 64, this downstream end portion of the extension 30.
- they together form a structure extending substantially substantially continuous 360 ° about the axis 5, defining the annular groove 66 which can itself be continuous along the circumference of the extension.
- the annular downstream end of connection 64 can be interrupted in certain places over limited angular amplitudes.
- the annular connecting downstream end 64 when the groove 66 that it defines is intended to cooperate with two thrust reverser covers, is interrupted only at the passage of the rigid structure of the suspension pylon on which are hinged these hoods, and at the lower ends of the same hoods. Therefore, the groove 66 and the downstream connecting end 64 usually have two diametrically opposed interruptions, preferably at 6 o'clock and at 12 o'clock.
- This arrangement therefore comprises the two kinds of angular sectors, arranged alternately in the circumferential direction.
- the second angular sectors 76a are made of a light material such as an aluminum alloy, and are made in one piece with the joining ferrule 74 being arranged in positions where the level of forces transmitted by the covers of thrust reverser is relatively weak.
- these second angular sectors 76a preferably extend over at least 80% of the circumference of the body.
- first angled sectors reported 76b are fixed on the one-piece body 77 at positions where the level of forces transmitted by the thrust reverser covers is greater.
- such sectors 76b are situated at the right, in the longitudinal / axial direction, of the control cylinders 60 of the thrust reversal systems, whether these systems are of the "door" type as described above, or that they are of another design known to those skilled in the art, such as that known as "grids".
- first sectors 76b are provided near the 12 o'clock position, on either side thereof, and two other first sectors 76b close to the 6-position. hours, also on both sides of it.
- Each of the four sectors 76b extends over an angular amplitude, for example between 5 and 20 °. In total, these first angular sectors 76b preferably extend over less than 20% of the circumference of the body.
- a second sector 76a fills the space between the two sectors 76b of each pair at 12 o'clock and at 6 o'clock.
- the two spaces respectively centered on these two diametrically opposite positions can remain free, interrupting the junction end 64 and its groove 66, without departing from the scope of the invention.
- FIGS. 8a and 8b it is shown the body of a single piece 77 including junction ferrule 74 and two second sectors 76a directly consecutive, spaced apart from each other by a recess of material 79 practiced in the body .
- this recess it is placed, respectively at the two ends of this recess 79, two first angular sectors 76b each located in the continuity of one of the two sectors 76a defining the recess.
- the portion of the annular groove 66 defined by each second sector 76a is thus extended by a groove portion defined by the first adjacent sector 76b.
- a space 81 is kept between the first two sectors 76b, for the passage of the rigid structure of the mast and for the attachment of the covers on one another.
- the joining ferrule 74 forming an integral part of the one-piece body 77, extends forwardly to the outer shell 23 of the intermediate casing, or is connected to another ferrule which is fixed at its front end to this same outer shell 23.
- the latter case is the one shown in Figure 8b and Figure 9, on which the joining ferrule 74 is assembled at its periphery on a front ferrule 74 ', which incorporates an annular flange 75 for fixing on the outside. the downstream end of the outer shell 23, also carrying an annular fixing flange 83.
- the joining ferrule 74 extends forward to the intermediate casing, and itself bears the flange 75, also called clamp.
- FIGS. 9 and 11 show that each first angular sector 76b is mounted by means of screws 78 on the body 77, in the recess 79.
- suitable screw-passing orifices 87 are provided on a radial blank 85 which remains on the periphery of the body 77, blank on which the sector 76b bears axially.
- the latter is also in radial support on a strip of material 89 also participating in the delimitation of the recess 79, and forms a seat for this second angular sector 76b.
- the seat 89 and the blank 85 thus delimit a space filled by the added angular sector 76b, which contrasts with the corresponding solid and monoblock portion 91 of the second sector 76a, shown in FIG.
- first sectors 76b therefore comes from their assembly screwed on the extension body 77, with the screws 78 oriented substantially axially.
- a radial screw solution could also be envisaged, without departing from the scope of the invention.
- the segmentation of the downstream end of connection 64 and its groove 66 has been represented as an indicative example. It is noted that the number of these angular sectors 76a, 76b, easily replaceable with respect to the first sectors 76b more mechanically stressed, can be adapted according to the needs encountered. In addition, the second angular sectors 76a can be further lightened by a different design than the first sectors 76b. In this regard, it is noted that the sectors 76a, 76b could alternatively be made of the same material and only differ in their design, or even be of substantially identical design.
- the body 77 is preferably made by machining, even if a solution by molding is also possible.
- FIG. 12 to 15 there is shown an extension 30 according to a second preferred embodiment of the invention.
- the peculiarity lies in the design of the retention means of the nacelle hoods, which, instead of a groove, take the form of a retaining flange 66 projecting radially outwards from the Junction ferrule 74.
- the other elements are identical or similar to those described in the context of the first preferred embodiment. Also, it is noted that in the figures, the elements bearing the same reference numerals correspond to identical or similar elements.
- the annular flange 66 has the same segmented design as that of the groove described above. It thus has first angular sectors 76b reported on the body 77, made in one piece and integrating both the joining ferrule 74 and the second angular sectors 76a. All the features described in connection with the groove of the first preferred embodiment are therefore applicable to this annular flange 66 of the second embodiment.
- the flange 66 has a generally T-shaped section, the T bar being oriented radially outwardly. It cooperates with a holding structure 93 shown in FIGS. 13 and 14, the function of which is to grip the flange 66 and a portion 68 of the nacelle cowlings 38, this portion also being comparable to a flange extending radially towards the yoke. 'outside.
- the holding structure 93 extends continuously around the flange 66 and the nacelle portion 68 in support, or is circumferentially segmented. In section, it takes the general shape of a C-shaped clip oriented radially inwards, the two elements 66, 68 being retained within the hollow defined by C. To do this, the holding structure 93 has a first branch slid under the bar T of the flange 66, and a second opposite branch covering the portion 68, the latter also being pressed under the bar T of the flange.
- this holding structure 93 For the assembly of this holding structure 93, there is for example provided a connection to interconnection between the downstream branch of the C and the nacelle hood portion 68, as can be seen in FIG. 14. Consequently, these two elements each have a succession of teeth and recesses, the teeth being confronted two by two to obtain the attachment as shown in Figure 14.
- the holding structure 93 in the form of a ring is pivoted along the axis 5 so as to bring the teeth facing the recesses, and allow the withdrawal of the holding ring by simple translation upstream.
- conventional means may be used to block the rotation of the ring gear 93, for example bolts screwed into the flange 66.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1510330.2A GB2523507B (en) | 2012-12-18 | 2013-12-16 | Intermediate casing extension of improved design |
US14/652,573 US9920654B2 (en) | 2012-12-18 | 2013-12-16 | Intermediate casing extension of improved design |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1262269A FR2999651B1 (fr) | 2012-12-18 | 2012-12-18 | Extension de carter intermediaire a conception amelioree |
FR1262269 | 2012-12-18 |
Publications (1)
Publication Number | Publication Date |
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WO2014096647A1 true WO2014096647A1 (fr) | 2014-06-26 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2013/053082 WO2014096647A1 (fr) | 2012-12-18 | 2013-12-16 | Extension de carter intermediaire a conception amelioree |
Country Status (4)
Country | Link |
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US (1) | US9920654B2 (fr) |
FR (1) | FR2999651B1 (fr) |
GB (1) | GB2523507B (fr) |
WO (1) | WO2014096647A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3144499A4 (fr) * | 2014-08-22 | 2018-01-24 | IHI Corporation | Boîtier cylindrique |
FR3117173A1 (fr) * | 2020-12-09 | 2022-06-10 | Safran Aircraft Engines | Ensemble propulsif d’aéronef et procédé d’adaptation d’un ensemble propulsif |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US10060292B2 (en) * | 2013-03-14 | 2018-08-28 | United Technologies Corporation | Castellated latch mechanism for a gas turbine engine |
GB201306674D0 (en) * | 2013-04-12 | 2013-05-29 | Rolls Royce Plc | Rigid Raft for a Gas Turbine Engine |
JP6118721B2 (ja) * | 2013-12-20 | 2017-04-19 | 株式会社Ihi | ファンケース及びファンケースの製造方法 |
FR3032180B1 (fr) * | 2015-01-30 | 2018-05-18 | Airbus Operations | Ensemble propulsif comportant un turboreacteur et un mat d'accrochage permettant une nouvelle distribution des efforts entre le turboreacteur et la voilure |
FR3055655B1 (fr) * | 2016-09-06 | 2019-04-05 | Safran Aircraft Engines | Carter intermediaire de turbine de turbomachine |
FR3098547B1 (fr) * | 2019-07-08 | 2022-04-29 | Safran Aircraft Engines | Assemblage de maintien d’un train d’engrenages dans une turbomachine |
CN117972943B (zh) * | 2024-03-29 | 2024-06-07 | 南京航空航天大学 | 一种基于空地状态等效模拟的航空发动机主轴承载荷预计方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2865002A1 (fr) * | 2004-01-12 | 2005-07-15 | Snecma Moteurs | Turboreacteur a double flux comprenant un support de distribution de servitudes et le support de distribution de servitudes. |
FR2925120A1 (fr) | 2007-12-18 | 2009-06-19 | Snecma Sa | Extension de carter intermediaire pour turboreacteur d'aeronef, comprenant une rainure annulaire sectorisee de reception des capots de nacelle |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4534167A (en) * | 1982-12-27 | 1985-08-13 | The Boeing Company | Inlet cowl attachment for jet engine |
FR2933130B1 (fr) * | 2008-06-25 | 2012-02-24 | Snecma | Carter structural pour turbomachine |
FR2936223B1 (fr) * | 2008-09-23 | 2010-09-17 | Airbus France | Dispositif de liaison entre une entree d'air et une motorisation d'une nacelle d'aeronef |
US9114882B2 (en) * | 2010-10-26 | 2015-08-25 | United Technologies Corporation | Fan case and mount ring snap fit assembly |
US8511973B2 (en) * | 2010-06-23 | 2013-08-20 | Rohr, Inc. | Guide system for nacelle assembly |
US8727269B2 (en) * | 2011-06-06 | 2014-05-20 | General Electric Company | System and method for mounting an aircraft engine |
FR2994712B1 (fr) * | 2012-08-27 | 2018-04-13 | Safran Aircraft Engines | Procede d'assemblage d'une tuyere et d'un carter d'echappement d'une turbomachine |
US8985509B2 (en) * | 2012-08-31 | 2015-03-24 | United Technologies Corporation | Assembly for mounting a turbine engine to a pylon |
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2012
- 2012-12-18 FR FR1262269A patent/FR2999651B1/fr active Active
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2013
- 2013-12-16 GB GB1510330.2A patent/GB2523507B/en active Active
- 2013-12-16 WO PCT/FR2013/053082 patent/WO2014096647A1/fr active Application Filing
- 2013-12-16 US US14/652,573 patent/US9920654B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2865002A1 (fr) * | 2004-01-12 | 2005-07-15 | Snecma Moteurs | Turboreacteur a double flux comprenant un support de distribution de servitudes et le support de distribution de servitudes. |
FR2925120A1 (fr) | 2007-12-18 | 2009-06-19 | Snecma Sa | Extension de carter intermediaire pour turboreacteur d'aeronef, comprenant une rainure annulaire sectorisee de reception des capots de nacelle |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3144499A4 (fr) * | 2014-08-22 | 2018-01-24 | IHI Corporation | Boîtier cylindrique |
FR3117173A1 (fr) * | 2020-12-09 | 2022-06-10 | Safran Aircraft Engines | Ensemble propulsif d’aéronef et procédé d’adaptation d’un ensemble propulsif |
Also Published As
Publication number | Publication date |
---|---|
FR2999651A1 (fr) | 2014-06-20 |
GB201510330D0 (en) | 2015-07-29 |
GB2523507A (en) | 2015-08-26 |
US20150345333A1 (en) | 2015-12-03 |
GB2523507B (en) | 2016-05-04 |
FR2999651B1 (fr) | 2015-01-16 |
US9920654B2 (en) | 2018-03-20 |
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