WO2022208801A1 - ターボファンエンジンのファンケースアッセンブリ - Google Patents
ターボファンエンジンのファンケースアッセンブリ Download PDFInfo
- Publication number
- WO2022208801A1 WO2022208801A1 PCT/JP2021/014003 JP2021014003W WO2022208801A1 WO 2022208801 A1 WO2022208801 A1 WO 2022208801A1 JP 2021014003 W JP2021014003 W JP 2021014003W WO 2022208801 A1 WO2022208801 A1 WO 2022208801A1
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- WO
- WIPO (PCT)
- Prior art keywords
- panel
- fan case
- elastic body
- fan
- axial
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims description 25
- 230000005489 elastic deformation Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 description 16
- 230000004048 modification Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 238000013459 approach Methods 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Images
Classifications
-
- 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
- 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
- F01D25/26—Double casings; Measures against temperature strain in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/78—Other construction of jet pipes
- F02K1/82—Jet pipe walls, e.g. liners
- F02K1/827—Sound absorbing structures or liners
-
- 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
Definitions
- the present disclosure relates to fan case assemblies for turbofan engines.
- Patent Document 1 discloses a cylindrical fan case assembly that radially surrounds a fan of an aircraft turbofan engine.
- the fan case assembly includes a fan case, a first panel that covers the inner peripheral surface of the fan case and faces the fan, and a panel that covers the inner peripheral surface of the fan case and is located upstream or downstream of the first panel. a positioned second panel.
- Each of the fan case, the first panel and the second panel is fixed by adhesive or bolts.
- a fan case assembly for a turbofan engine includes a tubular fan case surrounding a fan of the turbofan engine, and a tubular panel set covering an inner peripheral surface of the fan case, A panel set having a plurality of panels arranged in the axial direction of a turbofan engine, and at least one elastic body compressed by two members selected from the fan case and the plurality of panels.
- the positions of the two members selected from the fan case and the plurality of panels are stably held by the elastic body, and the elastic deformation of the elastic body between the two members causes a difference in thermal expansion. Or processing tolerances are absorbed. Therefore, stress concentrations or vibrations in the fan case assembly can be reduced.
- stress concentration or vibration in the fan case assembly can be reduced.
- FIG. 1 is a cross-sectional view of the turbofan engine according to the embodiment as seen from the radial direction.
- FIG. 2 is a cross-sectional view of the fan case assembly of FIG. 1 viewed from the radial direction.
- 3 is a front view of the fan case assembly of FIG. 2 as seen from the axial direction;
- FIGS. 4A and 4B are enlarged cross-sectional views of modifications of the fan case assembly of FIG.
- FIG. 5 is an enlarged view of the radial elastic body of FIG. 2 and its vicinity.
- FIG. 6(A) is an enlarged view of the axial elastic body and its vicinity in a cross-sectional view taken along line VIa-VIa of FIG. FIG.
- FIG. 6(B) is a diagram of the axial elastic body and its vicinity in FIG. 6(A) viewed from the radial direction.
- FIG. 7 is a cross-sectional view showing a modification of the peripheral structure of the axial elastic body of FIG.
- FIG. 8 is a drawing corresponding to FIG. 5 showing a first modification of the radial elastic body.
- FIG. 9 is a drawing corresponding to FIG. 5 showing a second modification of the radial elastic body.
- FIG. 10A is a drawing corresponding to FIG. 6A showing a first modification of the axial elastic body.
- FIG. 10B is a drawing corresponding to FIG. 6B showing a first modification of the axial elastic body.
- FIG. 11A is a drawing corresponding to FIG.
- FIG. 6A showing a second modification of the axial elastic body.
- FIG. 11B is a drawing corresponding to FIG. 6B showing a second modification of the axial elastic body.
- FIG. 12A is a drawing corresponding to FIG. 6A showing a third modification of the axial elastic body.
- FIG. 12B is a drawing corresponding to FIG. 6B showing a third modification of the axial elastic body.
- FIG. 13A is a drawing corresponding to FIG. 6A showing a fourth modification of the axial elastic body.
- FIG. 13B is a drawing corresponding to FIG. 6B showing a fourth modification of the axial elastic body.
- the axial direction X means the direction in which the rotation axis L of the rotation shaft 2 of the turbofan engine 1 extends
- the radial direction Y means the direction orthogonal to the rotation axis X
- the circumferential direction Z means the direction extending circumferentially around the axis X of rotation.
- front means the upstream side in the direction in which air flows within the turbofan engine 1
- rear means the downstream side in the direction in which air flows within the turbofan engine 1 .
- FIG. 1 is a cross-sectional view of the turbofan engine 1 according to the embodiment viewed from the radial direction.
- the turbofan engine 1 is, for example, a gas turbine engine used in aircraft. Note that the use of gas turbines is not limited to aircraft.
- a turbofan engine 1 comprises a rotating shaft 2 , a fan 3 , a compressor 4 , a combustor 5 , a turbine 6 , a casing 7 and a fan case assembly 10 .
- the rotating shaft 2 extends in the longitudinal direction of the turbofan engine 1 .
- the fan 3 is connected to the front portion of the rotating shaft 2 and rotates together with the rotating shaft 2 .
- Compressor 4 , combustor 5 , and turbine 6 are arranged in this order from front to rear along rotating shaft 2 .
- the casing 7 houses the rotating shaft 2 , the compressor 4 , the combustor 5 and the turbine 6 .
- the casing 7 and the fan case assembly 10 are cylindrical bodies having an axis aligned with the rotation axis L of the rotating shaft 2 .
- the turbofan engine 1 is, for example, a two-shaft gas turbine engine, but may be a three-shaft gas turbine engine or the like.
- the compressor 4 has a low-pressure compressor 4a and a high-pressure compressor 4b arranged behind the low-pressure compressor 4a.
- the turbine 6 has a high pressure turbine 6b and a low pressure turbine 6a behind the high pressure turbine 6b.
- the rotary shaft 2 has a low-pressure shaft 2a connecting the low-pressure compressor 4a to the low-pressure turbine 6a, and a high-pressure shaft 2b connecting the high-pressure compressor 4b to the high-pressure turbine 6b.
- the high-pressure shaft 2b is a cylindrical shaft having a hollow space inside.
- the low pressure shaft 2a is inserted through the hollow space of the high pressure shaft 2b.
- the low pressure turbine 6a is connected to the fan 3 arranged in front of the compressor 4 via the low pressure shaft 2a.
- the fan 3 is covered with a tubular fan case assembly 10 from the outside in the radial direction Y thereof.
- the fan case assembly 10 is a cylinder having an axis coinciding with the rotation axis L. As shown in FIG. A cylindrical bypass is formed between the casing 7 and the fan case assembly 10 . The air sucked by the fan 3 flows through this bypass and is jetted rearward to generate a driving force.
- the fan case assembly 10 is covered from the outside in the radial direction Y by an outer cover (not shown).
- FIG. 2 is a cross-sectional view of the fan case assembly 10 of FIG. 1 viewed from the radial direction.
- 3 is a front view of the fan case assembly 10 of FIG. 2 as seen from the axial direction X.
- fan case assembly 10 includes fan case 11 , panel set 12 , radial elastic body 13 , first axial elastic body 14 and second axial elastic body 15 .
- the fan case 11 has a cylindrical shape centered on the rotation axis L, and surrounds the fan 3 from the outside in the radial direction Y.
- the fan case 11 has a fan case body 20 , a front closing plate 21 and a rear closing plate 22 .
- the fan case main body 20 has a tubular shape.
- the front closing plate 21 and the rear closing plate 22 are annular plates whose centers are located on the rotation axis L. As shown in FIG.
- the shape of the front closing plate 21 and the rear closing plate 22 is not particularly limited as long as they can be fixed to the fan case main body 20 .
- the front closing plate 21 is detachably fixed to the front end of the fan case body 20 with fasteners.
- the rear closing plate 22 is detachably fixed to the rear end of the fan case body 20 with fasteners.
- the front closing plate 21 and the rear closing plate 22 protrude inward in the radial direction Y from the inner peripheral surface 20 a of the fan case main body 20 .
- One of the front closing plate 21 and the rear closing plate 22 may be non-detachably fixed to the fan case main body 20 .
- the panel set 12 has a tubular shape that covers the inner peripheral surface 20a of the fan case main body 20.
- the panel set 12 has a plurality of panels arranged from front to back in the axial direction X.
- panel set 12 includes fan track liner panel 30 , first acoustical panel 31 and second acoustical panel 32 .
- the fan track liner panel 30 faces the fan 3 (see FIG. 1) from the outside in the radial direction Y.
- the first sound absorbing panel 31 is arranged on one side (front side) of the fan track liner panel 30 in the axial direction X.
- the second sound absorbing panel 32 is arranged on the other side (rear side) of the fan track liner panel 30 in the axial direction X.
- the fan case 11 and the panel set 12 are made of different materials.
- the coefficient of linear expansion of the fan case 11 and the coefficient of linear expansion of the panel set 12 are different from each other.
- the linear expansion coefficient of the fan case 11 is smaller than that of the panel set 12 .
- the fan case 11 may be made of fiber-reinforced resin, metal, or the like
- the panel set 12 may be made of metal, resin, fiber-reinforced resin, or the like.
- the fiber-reinforced resin is preferably FRP composed of carbon fiber and epoxy resin, but may be another FRP.
- Aluminum is preferably used as the metal, but other metals may also be used.
- the fan case 11 and the panel set 12 may be made of the same material, and the coefficient of linear expansion of the fan case 11 and the coefficient of linear expansion of the panel set 12 may be the same.
- the fan case 11 (fan case main body 20) and the panel set 12 are arranged with a radial gap Gr between them.
- a radial gap Gr is a space (air layer) formed between the inner peripheral surface of the fan case 11 and the outer peripheral surface of the panel set 12 .
- the fan track liner panel 30 and the first sound absorbing panel 31 are arranged with a first axial gap Ga1.
- the fan track liner panel 30 and the second sound absorbing panel 32 are arranged with a second axial gap Ga2 therebetween.
- Each of the first axial gap Ga1 and the second axial gap Ga2 is a space (air layer).
- Each of the fan track liner panel 30, the first sound absorbing panel 31 and the second sound absorbing panel 32 is, for example, an integral body having a tubular shape.
- each of the fan track liner panel 30, the first sound absorbing panel 31, and the second sound absorbing panel 32 is composed of a plurality of tubular parts (for example, a pair of semi-cylinders are engaged with each other to form a tubular shape). ), or a quasi-cylindrical shape having a C-shaped cross section. That is, each of the panels 30-32 may be substantially cylindrical as a whole.
- the inner peripheral surface of the fan track liner panel 30 is made of a material with lower abrasion resistance than the inner peripheral surfaces of the first sound absorbing panel 31 and the second sound absorbing panel 32 . That is, when the fan 3 contacts the inner peripheral surface of the fan track liner panel 30, the fan track liner panel 30 is worn and the fan 3 is protected.
- Each of the first sound absorbing panel 31 and the second sound absorbing panel 32 has a plurality of sound absorbing holes formed in its inner peripheral surface, and has a plurality of resonance chambers communicating with the respective sound absorbing holes.
- each of the fan track liner panel 30, the first sound absorbing panel 31, and the second sound absorbing panel 32 may have a structure in which a honeycomb panel is sandwiched from both sides in the radial direction Y by an outer plate and an inner plate.
- the inner panel of the fan track liner panel 30 is made of a material with lower abrasion resistance than the inner panels of the first sound absorbing panel 31 and the second sound absorbing panel 32, 2 Sound absorbing holes are formed in the inner panel of the sound absorbing panel 32 .
- the fan case 11 can be made of fiber reinforced resin, for example.
- the sound absorbing panels 31, 32 may be made of aluminum, for example.
- the honeycomb panel of the fan track liner panel 30 may be formed, for example, by filling the interstices of meta-aramid fibers with epoxy. This material configuration is merely an example and is not limiting.
- the radial elastic body 13 is arranged in the radial gap Gr.
- a radial elastic body 13 is arranged between the fan case 11 and the panel set 12 .
- the radial elastic body 13 is compressed in the radial direction Y by the fan case 11 and panel set 12 .
- the radial elastic body 13 is configured to be elastically deformable in the radial direction Y.
- the radial elastic body 13 may be, for example, a spring or a member made of an elastic material such as rubber.
- the radial elastic bodies 13 are arranged at equal intervals in the circumferential direction Z on the outer peripheral surface of the panel set 12 .
- the radial elastic bodies 13 may be arranged at arbitrary intervals in the circumferential direction Z on the outer peripheral surface of the panel set 12 .
- the first axial elastic body 14 is arranged in the first axial gap Ga1.
- the first axial elastic body 14 is arranged between the fan track liner panel 30 and the first sound absorbing panel 31 .
- the first axial elastic body 14 is compressed in the axial direction X by the fan track liner panel 30 and the first sound absorbing panel 31 .
- the second axial elastic body 15 is arranged in the second axial gap Ga2.
- a second axial elastic 15 is positioned between the fan track liner panel 30 and the second acoustic panel 32 .
- the second axial elastic body 15 is compressed in the axial direction X by the fan track liner panel 30 and the second sound absorbing panel 32 .
- the first axial elastic body 14 and the second axial elastic body 15 are configured to be elastically deformable in the axial direction X. As shown in FIG.
- the first axial elastic body 14 and the second axial elastic body 15 may be, for example, springs or members made of an elastic material such as rubber.
- the axial elastic body 16 may be arranged in the axial gap Ga3 between the front closing plate 21 and the first sound absorbing panel 31, as shown in FIG. 4(A). Further, as shown in FIG. 4B, the axial elastic body 17 may be arranged in the axial gap Ga4 between the rear closing plate 22 and the second sound absorbing panel 32. That is, the axial elastic body is compressed between at least two adjacent elements selected from the front closing plate 21, the first sound absorbing panel 31, the fan track liner panel 30, the second sound absorbing panel 32 and the rear closing plate 22. may be placed.
- FIG. 5 is an enlarged view of the radial elastic body 13 in FIG. 2 and its vicinity.
- the radial elastic body 13 attached to the first sound absorbing panel 31, the radial elastic body 13 attached to the fan track liner panel 30, and the radial elastic body 13 attached to the second sound absorbing panel 32 all use the same radial elastic body 13. can be used. Therefore, in FIG. 5, the radial elastic body 13 attached to the first sound absorbing panel 31 will be described as a representative. Note that the radial elastic bodies 13 may be made of different materials and shapes in consideration of the difference in thermal expansion and processing tolerance among the first sound absorbing panel 31, the fan track liner panel 30 and the second sound absorbing panel 32. can.
- the radial elastic body 13 has a mounting portion 13a and an elastic portion 13b continuous in the axial direction X with the mounting portion 13a.
- the mounting portion 13 a is fastened to the first sound absorbing panel 31 with a fastener B ⁇ b>1 inserted through the mounting hole 31 b of the first sound absorbing panel 31 .
- the elastic portion 13b is configured to be elastically deformable in the radial direction Y. As shown in FIG.
- the elastic portion 13b protrudes outward in the radial direction Y from the first sound absorbing panel 31 by a larger amount than the fastener B1.
- the mounting portion 13a may be fixed to the first sound absorbing panel 31 by other means such as an adhesive.
- the radial elastic body 13 may be attached to the fan case main body 20 instead of being attached to the first sound absorbing panel 31 .
- the radial elastic body 13 is, for example, a leaf spring extending in the axial direction X.
- the attachment portion 13a has a shape (for example, an arc shape) corresponding to the outer peripheral surface 31a of the first sound absorbing panel 31 .
- the elastic portion 13b has at least one portion that protrudes outward in the radial direction Y.
- the elastic portion 13b has one arch-shaped projecting portion.
- the shape of the elastic portion 13b is not limited to this.
- the end opposite to the mounting portion 13a is the unfixed end 13c. Note that the end portion 13 c may be fixed to the first sound absorbing panel 31 .
- the elastic portion 13b has a tapered shape that tapers toward the fan case main body 20 of the fan case 11 .
- the elastic portion 13b has a slope surface 13ba continuous with the mounting portion 13a.
- the slope surface 13ba is an inclined surface that gradually approaches the outer peripheral surface 31a of the first sound absorbing panel 31 as it approaches the mounting portion 13a.
- the first sound absorbing panel 31 is inserted from the front into the fan case body 20 from which the front closing plate 21 has been removed. It is compressed inward in the radial direction Y. At that time, the end portion 13 c of the radial elastic body 13 slides in the axial direction X on the outer peripheral surface 31 a of the first sound absorbing panel 31 .
- a stopper 31c is formed on the outer peripheral surface 31a of the first sound absorbing panel 31 with an arbitrary distance from the end portion 13c of the radial elastic body 13.
- the stopper 31 c protrudes outward in the radial direction Y from the outer peripheral surface 31 a of the first sound absorbing panel 31 .
- the first sound absorbing panel 31 moves toward the fan case body 20 in the radial direction Y by the radial elastic body 13. elastically supported.
- the first sound absorbing panel 31 can move toward or away from the fan case body 20 in the radial direction Y while being supported by the fan case body 20 .
- FIG. 6(A) is an enlarged view of the first axial elastic body 14 and its vicinity in a cross-sectional view taken along line VIa-VIa of FIG.
- FIG. 6(B) is a diagram of the first axial elastic body 14 and its vicinity in FIG. 6(A) viewed from the radial direction.
- the first axial elastic body 14 and the second axial elastic body 15 are the same as each other. Therefore, in FIGS. 6A and 6B, the first axial elastic body 14 will be described as a representative.
- the axial elastic bodies 14 and 15 are made of different materials and shapes in consideration of differences in thermal expansion and processing tolerances among the first sound absorbing panel 31, the fan track liner panel 30, and the second sound absorbing panel 32. You may
- the first axial elastic body 14 has a mounting portion 14a and a pair of elastic portions 14b continuous in the circumferential direction Z with the mounting portion 14a.
- the mounting portion 14a is fastened to the fan track liner panel 30 by a plurality of fasteners B2 that are inserted through mounting holes 30b formed in an end surface 30a of the fan track liner panel 30 in the axial direction X.
- the elastic portion 14b is configured to be elastically deformable in the axial direction X.
- the elastic portion 14b protrudes in the axial direction X from the end face 30a of the fan track liner panel 30 by a larger amount than the fastener B2.
- the mounting portion 14a may be fixed to the fan track liner panel 30 by other means such as an adhesive.
- the first axial elastic body 14 may be attached to the first acoustic panel 31 instead of being attached to the fan track liner panel 30 .
- the first axial elastic body 14 is, for example, a leaf spring extending in the circumferential direction Z.
- the mounting portion 14a has a shape (for example, a flat plate shape) along the end face 30a of the fan track liner panel 30.
- the elastic portion 14b has at least one portion protruding in the axial direction X.
- the elastic portion 14b has a corrugated plate shape, but the shape of the elastic portion 14b is not limited thereto. Both ends of the first axial elastic body 14 in the circumferential direction Z are non-fixed ends 14c.
- a stopper 30c is formed on the end face 30a of the fan track liner panel 30 so as to face the end 14c of the first axial elastic body 14 in the circumferential direction Z with a distance therebetween.
- the stopper 30 c protrudes forward in the axial direction X from the end surface 30 a of the fan track liner panel 30 .
- the elastic portion 14 b of the first axial elastic body 14 is pressed in the axial direction X by the first sound absorbing panel 31 . Therefore, the fan track liner panel 30 can move toward or away from the first sound absorbing panel 31 in the axial direction X. As shown in FIG.
- the fan case 11 , the fan track liner panel 30 , the first sound absorbing panel 31 and the second sound absorbing panel 32 have the radial elastic body 13 , the first axial elastic body 14 and the second axial elastic body 15 . Therefore, the two members are stably held, and the difference in thermal expansion or processing tolerance is absorbed by the elastic deformation of the elastic body between the two members. Therefore, problems such as stress concentration or vibration of the fan case assembly 10 can be prevented from occurring.
- the linear expansion coefficients of the fan case 11 and the panel set 12 are different from each other, the difference in thermal expansion is favorably absorbed. Also, the degree of freedom in selecting materials for the fan case 11 and the panel set 12 can be improved.
- stoppers 30c and 31c that limit the elastic deformation of the elastic bodies 13-15 can be provided, it is possible to prevent the elastic bodies 13-15 from being excessively elastically deformed and resulting in an unexpected displacement.
- the panel set 12 can be inserted into the fan case 11 in the axial direction X when the fan case assembly 10 is assembled. Efficiency can be improved.
- the mounting portion 13a of the radial elastic body 13 is mounted to the panel set 12 by means of the fastener B1 that is inserted through the mounting hole 31b of the panel set 12. This eliminates the need to provide the fan case 11, thereby preventing a decrease in the strength of the fan case 11, which requires containment performance.
- the fan track liner panel 30, the first sound absorbing panel 31 and the second sound absorbing panel 32 can be stably mounted. It can flexibly accommodate thermal expansion differences or processing tolerances of the panels 30-32 while supporting them.
- FIG. 7 is a cross-sectional view showing a modification of the peripheral structure of the axial elastic body 14 of FIG.
- two members for example, the fan track liner panel 130 and the first sound absorbing panel 131 sandwiching the first axial elastic body 14 in the axial direction X are arranged in the radial direction Y.
- a structure 140 is provided for positioning the .
- the positioning structure 140 has, for example, a circumferential projection 130e projecting in the axial direction X from the inner peripheral edge of the end face 130a of the fan track liner panel 130.
- the circumferential projection 130 e is in contact with the inner circumferential surface of the first sound absorbing panel 131 .
- the circumferential protrusion 130 e may protrude from the first sound absorbing panel 131 .
- the fan track liner panel 130 and the first sound absorbing panel 131 can be positioned in the radial direction Y with respect to each other.
- the circumferential convex portion 130e can cover the first axial elastic body 14 from the inside in the radial direction Y. As shown in FIG. Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
- FIG. 8 is a drawing corresponding to FIG. 5 showing the radial elastic body 113 of the first modified example.
- the radial elastic body 113 of the first modified example is made of an elastic material (for example, rubber).
- the radial elastic body 113 has a pair of mounting portions 113a and an elastic portion 113b arranged between the pair of mounting portions 113a in the axial direction X.
- the mounting portion 113 a is fastened to the first sound absorbing panel 31 with a fastener B ⁇ b>1 inserted through the mounting hole 31 b of the first sound absorbing panel 31 .
- the elastic portion 113b has a portion protruding outward in the radial direction Y.
- the elastic portion 113b protrudes outward in the radial direction Y from the first sound absorbing panel 31 by a larger amount than the fastener B1.
- the elastic portion 113b has a tapered shape that tapers toward the fan case main body 20.
- the elastic portion 113b has a slope surface 113ba continuous with the mounting portion 113a.
- the slope surface 113ba is an inclined surface that gradually approaches the outer peripheral surface 31a of the first sound absorbing panel 31 as it approaches the mounting portion 113a.
- FIG. 9 is a drawing equivalent to FIG. 5 showing a second modification of the radial elastic body 13.
- the radial elastic bodies 13 are attached to the fan case main body 20 instead of the first sound absorbing panel 31 .
- the radial elastic body 13 may be arranged so that the slope surface 13ba faces the insertion side (front side) of the first sound absorbing panel 31 .
- the mounting portion 13a may be arranged on the insertion side (front side) of the first sound absorbing panel 31 with respect to the elastic portion 13b. Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
- FIG. 10(A) is a drawing corresponding to FIG. 6(A) showing the axial elastic body 114 of the first modified example.
- FIG. 10B is a drawing corresponding to FIG. 6B showing the axial elastic body 114 of the first modified example.
- the axial elastic body 114 is an annular leaf spring.
- the axial elastic body 114 has a mounting portion 114a, which is a part of the ring, and an elastic portion 114b, which is the rest of the ring.
- the mounting portion 114a is fastened to the fan track liner panel 30 with fasteners B2.
- An opening 114c that exposes the fastener B2 when viewed from the axial direction X is formed in the elastic portion 114b.
- the mounting portion 114a may be fastened to the first sound absorbing panel 31 with a fastener B2.
- the fastener B2 may be covered by the elastic portion 114b.
- the first axial elastic body 114 is pressed in the axial direction X by the first sound absorbing panel 31 with the elastic portion 114b interposed between the fastener B2 and the first sound absorbing panel 31.
- the axial elastic body 114 is elastically deformed so that the contact area of the axial elastic body 114 with respect to the fan track liner panel 30 increases when the elastic portion 114b is pushed in the axial direction X by the end face 31d of the first sound absorbing panel 31 . Therefore, the axial elastic body 114 is prevented from being worn in the fan track liner panel 30 and the first sound absorbing panel 31 . Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
- FIG. 11(A) is a drawing corresponding to FIG. 6(A) showing the axial elastic body 214 of the second modified example.
- FIG. 11B is a drawing corresponding to FIG. 6B showing the axial elastic body 214 of the second modified example.
- the axial elastic body 214 is a bent leaf spring.
- the axial elastic body 214 has a mounting portion 214a and a pair of elastic portions 214b continuous on both sides in the circumferential direction Z of the mounting portion 214a.
- the mounting portion 214a is, for example, flat plate-shaped, and is fastened to the fan track liner panel 30 with fasteners B2. Also, the mounting portion 214a may be fastened to the first sound absorbing panel 31 by a fastener B2.
- the elastic portion 214b may be partially curved in a C shape or a U shape in a cross section viewed from the radial direction Y, for example. The elastic portion 214b protrudes in the axial direction X from the fastener B2. The elastic portion 214 b is compressed in the axial direction X by the end face 31 d of the first sound absorbing panel 31 . Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
- FIG. 12(A) is a drawing corresponding to FIG. 6(A) showing the axial elastic body 314 of the third modified example.
- FIG. 12B is a drawing corresponding to FIG. 6B showing the axial elastic body 314 of the third modified example.
- the axial elastic body 314 is a bent plate spring.
- the axial elastic body 314 includes a pair of mounting portions 314a, a central elastic portion 314b arranged between the pair of mounting portions 314a, and a side elastic portion 314c arranged outside the pair of mounting portions 314a in the circumferential direction Z. have.
- the mounting portion 314a is, for example, flat plate-shaped, and is fastened to the fan track liner panel 30 with fasteners B2. Also, the mounting portion 314a may be fastened to the first sound absorbing panel 31 by a fastener B2.
- the central elastic portion 314b is curved so as to protrude toward the first sound absorbing panel 31 side.
- the side elastic portion 314c may be partially curved in a C shape or a U shape in a cross section viewed from the radial direction Y, for example. The central elastic portion 314b and the side elastic portions 314c protrude in the axial direction X from the fastener B2.
- the central elastic portion 314 b and the side elastic portions 314 c are compressed in the axial direction X by the end surface 31 d of the first sound absorbing panel 31 . Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
- FIG. 13(A) is a drawing corresponding to FIG. 6(A) showing the axial elastic body 414 of the fourth modified example.
- FIG. 13B is a drawing corresponding to FIG. 6B showing the axial elastic body 414 of the fourth modification.
- the axial elastic body 414 is made of an elastic material (eg, rubber).
- the axial elastic body 414 has a mounting portion 414a and a pair of elastic portions 414b continuous on both sides in the circumferential direction Z of the mounting portion 414a.
- Attachment portion 414a is fastened to fan track liner panel 30 by fastener B2.
- the mounting portion 414a may be fastened to the first sound absorbing panel 31 by a fastener B2.
- the elastic portion 414b protrudes in the axial direction X from the fastener B2.
- the elastic portion 414 b is compressed in the axial direction X by the end surface 31 d of the first sound absorbing panel 31 . Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
3 ファン
10 ファンケースアッセンブリ
11 ファンケース
12 パネルセット
13,113 ラジアル弾性体
13a,113a 取付部
13b,113b 弾性部
14,114,214,314,414 第1アキシャル弾性体
14a,114a,214a,314a,414a 取付部
14b,114b,214b,314b,314c,414b 弾性部
15 第2アキシャル弾性体
20 ファンケース本体
21 前閉鎖板
22 後閉鎖板
30,130 ファントラックライナーパネル
30c ストッパ
31,131 第1吸音パネル
31c ストッパ
32 第2吸音パネル
Gr ラジアルギャップ
Ga1 第1アキシャルギャップ
Ga2 第2アキシャルギャップ
B1,B2 締結具
L 回転軸線
X 軸線方向
Y 径方向
Z 周方向
Claims (10)
- ターボファンエンジンのファンを径方向外方から囲む筒状のファンケースと、
前記ファンケースの内周面を被覆する筒状のパネルセットであって、前記ターボファンエンジンの軸線方向に並んだ複数のパネルを有するパネルセットと、
前記ファンケース及び前記複数のパネルから選ばれる2つの部材によって圧縮された少なくとも1つの弾性体と、を備える、ターボファンエンジンのファンケースアッセンブリ。 - 前記2つの部材の線膨張係数は、互いに異なる、請求項1に記載のターボファンエンジンのファンケースアッセンブリ。
- 前記2つの部材の一方は、前記弾性体の弾性変形を制限するストッパを有する、請求項1又は2に記載のターボファンエンジンのファンケースアッセンブリ。
- 前記少なくとも1つの弾性体は、前記ファンケース及び前記パネルセットによって径方向に圧縮されたラジアル弾性体を含む、請求項1乃至3のいずれか1項に記載のターボファンエンジンのファンケースアッセンブリ。
- 前記ラジアル弾性体は、前記パネルセット又は前記ファンケースの一方に取り付けられる取付部と、前記パネルセット又は前記ファンケースの他方によって径方向に圧縮される弾性部と、を有し、
前記弾性部は、テーパ形状を有する、請求項4に記載のターボファンエンジンのファンケースアッセンブリ。 - 前記パネルセットは、取付孔を有し、
前記ラジアル弾性体の前記取付部は、前記パネルセットの前記取付孔を挿通する締結具によって前記パネルセットに取り付けられる、請求項5に記載のターボファンエンジンのファンケースアッセンブリ。 - 前記少なくとも1つの弾性体は、前記複数のパネルによって前記軸線方向に圧縮された少なくとも1つのアキシャル弾性体を含む、請求項1乃至6のいずれか1項に記載のターボファンエンジンのファンケースアッセンブリ。
- 前記複数のパネルは、
第1吸音パネルと、
第2吸音パネルと、
前記軸線方向において前記第1吸音パネルと前記第2吸音パネルとの間に配置され、前記径方向において前記ファンに対向するファントラックライナーパネルと、を含み、
前記少なくとも1つのアキシャル弾性体は、
前記ファントラックライナーパネル及び前記第1吸音パネルによって前記軸線方向に圧縮された第1アキシャル弾性体と、
前記ファントラックライナーパネル及び前記第2吸音パネルによって前記軸線方向に圧縮された第2アキシャル弾性体と、を含む、請求項7に記載のターボファンエンジンのファンケースアッセンブリ。 - 前記ファンケースは、前記パネルセットの径方向外側に配置されたファンケース本体と、前記パネルセットの前記軸線方向の前端及び後端に配置されて前記ファンケース本体に固定された前閉鎖板及び後閉鎖板と、を有し、
前記少なくとも1つの弾性体は、前記前閉鎖板、前記複数のパネル及び前記後閉鎖板から選ばれる互いに隣り合う2つの要素によって前記軸線方向に圧縮された少なくとも1つのアキシャル弾性体を含む、請求項1乃至6のいずれか1項に記載のターボファンエンジンのファンケースアッセンブリ。 - 前記複数のパネルは、
前記前閉鎖板に対して前記軸線方向に対向する第1パネルと、
前記後閉鎖板に対して前記軸線方向に対向する第2パネルと、を含み、
前記少なくとも1つのアキシャル弾性体は、前記前閉鎖板及び前記第1パネルによって前記軸線方向に圧縮された、又は、前記後閉鎖板及び前記第2パネルによって前記軸線方向に圧縮されたアキシャル弾性体を含む、請求項9に記載のターボファンエンジンのファンケースアッセンブリ。
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PCT/JP2021/014003 WO2022208801A1 (ja) | 2021-03-31 | 2021-03-31 | ターボファンエンジンのファンケースアッセンブリ |
US18/283,965 US20240167434A1 (en) | 2021-03-31 | 2021-03-31 | Fan case assembly of turbo fan engine |
EP21934966.9A EP4317662A1 (en) | 2021-03-31 | 2021-03-31 | Fan case assembly for turbofan engine |
JP2023510080A JP7445822B2 (ja) | 2021-03-31 | 2021-03-31 | ターボファンエンジンのファンケースアッセンブリ |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2305985A2 (en) * | 2009-09-25 | 2011-04-06 | Rolls-Royce plc | Containment casing for an aero engine |
US20150003960A1 (en) * | 2013-03-04 | 2015-01-01 | Rolls-Royce Corporation | Springed fan track liner |
-
2021
- 2021-03-31 US US18/283,965 patent/US20240167434A1/en active Pending
- 2021-03-31 WO PCT/JP2021/014003 patent/WO2022208801A1/ja active Application Filing
- 2021-03-31 EP EP21934966.9A patent/EP4317662A1/en active Pending
- 2021-03-31 JP JP2023510080A patent/JP7445822B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2305985A2 (en) * | 2009-09-25 | 2011-04-06 | Rolls-Royce plc | Containment casing for an aero engine |
US20150003960A1 (en) * | 2013-03-04 | 2015-01-01 | Rolls-Royce Corporation | Springed fan track liner |
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EP4317662A1 (en) | 2024-02-07 |
US20240167434A1 (en) | 2024-05-23 |
JP7445822B2 (ja) | 2024-03-07 |
JPWO2022208801A1 (ja) | 2022-10-06 |
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