CN117662252A - Fan casing energy absorbing layer, aeroengine and aircraft - Google Patents

Fan casing energy absorbing layer, aeroengine and aircraft Download PDF

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Publication number
CN117662252A
CN117662252A CN202211042974.7A CN202211042974A CN117662252A CN 117662252 A CN117662252 A CN 117662252A CN 202211042974 A CN202211042974 A CN 202211042974A CN 117662252 A CN117662252 A CN 117662252A
Authority
CN
China
Prior art keywords
ring member
energy absorbing
panel
absorbing layer
inner ring
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
Application number
CN202211042974.7A
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Chinese (zh)
Inventor
柴象海
杨宵毅
史同承
王少辉
胡志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AECC Commercial Aircraft Engine Co Ltd
Original Assignee
AECC Commercial Aircraft Engine Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AECC Commercial Aircraft Engine Co Ltd filed Critical AECC Commercial Aircraft Engine Co Ltd
Priority to CN202211042974.7A priority Critical patent/CN117662252A/en
Publication of CN117662252A publication Critical patent/CN117662252A/en
Pending legal-status Critical Current

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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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/045—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector for radial flow machines or engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a fan casing energy-absorbing layer, an aeroengine and an aircraft, wherein the fan casing energy-absorbing layer is arranged on the inner wall of a fan casing and comprises an inner ring member and an outer ring member, the inner ring member is arranged far away from the inner wall relative to the outer ring member, and an energy-absorbing main body is filled between the inner ring member and the outer ring member; the energy-absorbing main body comprises at least one layer of panel, energy-absorbing units distributed along the length direction of the panel are arranged between the outer ring member and the panel, between two adjacent panels and between the panel and the inner ring member, each energy-absorbing unit comprises a supporting plate and a connecting plate, wherein the supporting plate is provided with a weak part, and two ends of the supporting plate and two ends of the connecting plate are respectively connected with the panel and the adjacent panel or the inner ring member or the outer ring member. After the blades are broken, the energy absorbing layer of the fan casing is broken or deformed at the weak part in the supporting plate, so that the connecting plates positioned at the side edges of the supporting plate are gathered towards the impact area, the impact energy of the broken fan blades is absorbed, and the containing capacity of the fan casing is enhanced.

Description

Fan casing energy absorbing layer, aeroengine and aircraft
Technical Field
The invention relates to a fan casing energy absorbing layer, an aeroengine and an aircraft.
Background
The main function of the fan casing of the turbofan engine with large bypass ratio is to contain broken fan blades, and in a typical aeroengine design, a thicker honeycomb layer is generally embedded in the casing. When the fan blade breaks, the broken piece collides with the honeycomb layer of the containing ring with great impact force, the honeycomb layer is compressed and deformed when the blade collides, and in the deformation process, the impact energy of the blade can be absorbed, so that the impact load born by the containing ring of the fan casing is reduced. In addition, the honeycomb structure can provide certain rigidity to prevent the fan casing from being worn with the fan rotor after deformation.
However, the traditional honeycomb layer adopts a hexahedral equal-wall-thickness structure, the honeycomb wall plates are radially parallel to the aero-engine, and are impacted by broken fan blades, so that the honeycomb wall plates are generally broken and fail, and the containing effect is poor.
Disclosure of Invention
The invention aims to overcome the defects that a honeycomb layer inside a casing is easy to break and the containing effect is poor in the prior art, and provides a fan casing energy absorbing layer, an aeroengine and an aircraft.
The invention solves the technical problems by the following technical scheme:
the invention provides a fan casing energy-absorbing layer which is arranged on the inner wall of a fan casing, wherein the fan casing energy-absorbing layer comprises an inner ring member and an outer ring member, the inner ring member is arranged away from the inner wall relative to the outer ring member, and an energy-absorbing main body is filled between the inner ring member and the outer ring member;
the energy absorbing body comprises at least one layer of panel, energy absorbing units distributed along the length direction of the panel are arranged between the outer ring member and the panel, between two adjacent panels and between the panel and the inner ring member, each energy absorbing unit comprises a supporting plate provided with a weak part and a connecting plate positioned on at least one side of the supporting plate, two ends of the supporting plate and two ends of the connecting plate are respectively connected with the panel and the adjacent panel or the inner ring member or the outer ring member, the weak part is arranged in the supporting plate after the inner ring member is impacted by blades, and the weak part can be broken or deformed in the supporting plate, so that the distance between the panel, the inner ring member, the panel, the outer ring member and the panel positioned on two sides of the supporting plate is reduced.
In the scheme, the structural form is adopted, and under the condition that the fan blades work normally, the supporting plate enhances the structural rigidity of the fan casing and provides support between the panel and the adjacent panel or the inner ring member or the outer ring member; after the fan blade is broken, the broken piece bumps into the inner ring component with very big impact force, the weak part in the supporting plate breaks or deforms, so as to ensure that the connecting plate can deform, the reaction force is generated in the energy absorbing main body after the force is transmitted to the outer ring component, the area between the supporting plate in the panel and the next layer of energy absorbing unit and the connecting plate is sunken towards the direction far away from the fan casing, the connecting plate positioned at the side edge of the supporting plate is applied with tension force towards the stressed position, the connecting plate is subjected to compression bending deformation and protrudes towards the direction close to the supporting plate, the connecting plate gathers towards the impact area, a negative poisson ratio effect is generated, the impact force of the fan blade part is absorbed, the impact force of the fan blade on the fan casing containing ring is reduced, the material concentration of the impact area can better resist the penetration of broken fan blade, the impact energy of the broken fan blade is absorbed, and the containing capacity of the fan casing is enhanced.
Preferably, the connecting plate is an arc plate, and the middle part of the connecting plate protrudes towards the direction close to the supporting plate.
In this scheme, adopt above-mentioned structural style, the inner ring component is suffered after the blade striking, and curved connecting plate can guide the direction of deformation, and the connecting plate compresses the effect of deformation better to the direction that is close to the backup pad.
Preferably, the two sides of the supporting plate are provided with the connecting plates.
In the scheme, the structure is adopted, and the connecting plates positioned at the two sides of the supporting plate gather towards the impact area, so that the containing capacity of the fan casing is further enhanced.
Preferably, the panel has a recess, two ends of the recess are respectively connected with the support plate and the connection plate in the energy absorbing unit of the next layer, and a connection part of the recess and the connection plate of the energy absorbing unit of the previous layer protrudes in a direction away from the fan casing.
In this scheme, adopt above-mentioned structural style, the inner ring component is suffered the blade striking back, and the depressed part can guide the deformation direction, and depressed part camber increases, further applys the pulling force to the connecting plate of side, and the connecting plate deformation effect is better.
Preferably, the connecting plate and the supporting plate are arranged at intervals.
In the scheme, the space of the cavity formed by the encircling of the supporting plate, the connecting plate, the panel, the adjacent panel or the outer ring member or the inner ring member is enlarged by adopting the structural form, and when the connecting plate is deformed, the space for the deformation of the connecting plate is larger, so that stronger deformation energy absorbing capacity can be obtained.
Preferably, the supporting plate is provided with a groove to form the weak part;
or, an aperture in the support plate to form the frangible portion.
In the scheme, the structure is adopted, so that the processing is convenient.
Preferably, the energy absorbing body comprises energy absorbing units of at least two sizes, and the cavities formed by the enclosing of the supporting plate, the connecting plate, the panel and the adjacent panel or the outer ring member or the inner ring member are larger as the cavities are closer to the inner wall.
In the scheme, by adopting the structural form, the energy-absorbing unit with the small cavity is close to the inner ring member, the energy-absorbing unit with the large cavity is close to the outer ring member, the small-scale energy-absorbing unit close to the inner ring member can provide enough rigidity, the large-scale energy-absorbing unit close to the outer ring member can have enough deformation energy-absorbing capacity, the hollow rate is high, and the structure is light.
Preferably, in each layer of the energy absorbing main body, a plurality of energy absorbing units are uniformly distributed along the circumferential direction of the fan casing.
Preferably, the fan casing energy absorbing layer is formed through an additive manufacturing process.
In the scheme, the additive manufacturing process is adopted to realize the feasibility of manufacturing, metal powder (such as aluminum alloy) is used as a raw material, the fan casing energy-absorbing layer is deposited layer by layer through laser melting/rapid solidification, the fan casing energy-absorbing layer is integrally formed, the structural reliability of the fan casing energy-absorbing layer can be ensured, and the fan casing energy-absorbing layer can be filled along with the shape of the fan casing; in addition, the processing personnel can be according to actual need, and different regional processing thickness in the fan receiver energy-absorbing layer are different.
Preferably, the energy absorbing layer of the fan casing is made of aluminum alloy.
In the scheme, the light weight of the fan casing energy absorption layer structure is realized.
The invention provides an aeroengine, which comprises the fan casing energy absorbing layer.
The present invention provides an aircraft comprising an aeroengine as described above.
The invention has the positive progress effects that:
under the condition that the fan blades work normally, the supporting plate enhances the structural rigidity of the fan casing and provides support between the panel and the adjacent panel or the inner ring member or the outer ring member; after the fan blade is broken, the broken piece bumps into the inner ring component with very big impact force, the weak part in the supporting plate breaks or deforms, so as to ensure that the connecting plate can deform, the reaction force is generated in the energy absorbing main body after the force is transmitted to the outer ring component, the area between the supporting plate in the panel and the next layer of energy absorbing unit and the connecting plate is sunken towards the direction far away from the fan casing, the connecting plate positioned at the side edge of the supporting plate is applied with tension force towards the stressed position, the connecting plate is subjected to compression bending deformation and protrudes towards the direction close to the supporting plate, the connecting plate gathers towards the impact area, a negative poisson ratio effect is generated, the impact force of the fan blade part is absorbed, the impact force of the fan blade on the fan casing containing ring is reduced, the material concentration of the impact area can better resist the penetration of broken fan blade, the impact energy of the broken fan blade is absorbed, and the containing capacity of the fan casing is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of an energy absorbing layer of a fan casing according to a preferred embodiment of the present invention.
FIG. 2 is a schematic view of another angle of the energy absorbing layer of the fan case according to the preferred embodiment of the present invention.
FIG. 3 is a schematic view of a portion of an energy absorbing layer of a fan case according to a preferred embodiment of the present invention.
FIG. 4 is a schematic illustration of a fan case energy absorbing layer suitable for use with a hard-wall containment case according to a preferred embodiment of the present invention.
FIG. 5 is a schematic illustration of a fan case energy absorbing layer suitable for use with a soft wall containment case according to a preferred embodiment of the present invention.
Reference numerals illustrate:
fan case energy absorbing layer 1
Inner ring member 11
Outer ring member 12
Energy absorbing body 13
Panel 131
Recess 1311
Energy absorbing unit 132
Support plate 1321
Weak portion 13211
Connecting plate 1322
Cavity 1323
First containing ring 2
First abradable coating 3
Second containing ring 4
Second abradable coating 5
Kevlar winding layer 6
Detailed Description
The invention is further illustrated by means of the following examples, which are not, however, intended to limit the scope of the invention.
As shown in fig. 1, 2 and 3, the embodiment of the invention provides a fan casing energy absorbing layer 1, which is installed on an inner wall of a fan casing, wherein the fan casing energy absorbing layer 1 comprises an inner ring member 11 and an outer ring member 12, the inner ring member 11 is far away from the inner wall relative to the outer ring member 12, and an energy absorbing main body 13 is filled between the inner ring member 11 and the outer ring member 12. The energy absorbing body 13 comprises at least one layer of panels 131, and energy absorbing units 132 distributed along the length direction of the panels 131 are arranged between the outer ring member 12 and the panels 131, between two adjacent panels 131 and between the panels 131 and the inner ring member 11, and the energy absorbing units 132 in each layer are distributed in a ring shape. The energy absorbing unit 132 includes a support plate 1321 provided with a weak portion 13211 and a connection plate 1322 located at least one side of the support plate 1321, both ends of the support plate 1321 and both ends of the connection plate 1322 are respectively connected with the panel 131 and the adjacent panel 131 or the inner ring member 11 or the outer ring member 12, and the weak portion 13211 is configured such that the weak portion 13211 in the support plate 1321 can be broken or deformed after the inner ring member 11 is impacted by the blade, so that the distances between the panel 131, the inner ring member 11 and the panel 131, and the outer ring member 12 and the panel 131 located at both sides of the support plate 1321 are reduced.
In other words, in the case that the energy absorbing body 13 includes a layer of the panel 131, a layer of the energy absorbing units 132 is distributed between the outer ring member 12 and the panel 131, and a layer of the energy absorbing units 132 is distributed between the inner ring member 11 and the panel 131; a support plate 1321 and a connecting plate 1322 distributed along the length direction of the panel 131 are connected between the outer ring member 12 and the panel 131, a support plate 1321 and a connecting plate 1322 are connected between the inner ring member 11 and the panel 131, and the connecting plate 1322 is positioned on at least one side of the support plate 1321; the weak portion 13211 in the support plate 1321 breaks or deforms after the inner ring member 11 is subjected to blade impact.
In the case that the energy-absorbing body 13 includes at least two layers of panels 131, a layer of energy-absorbing units 132 is distributed between the outer ring member 12 and the panels 131, a layer of energy-absorbing units 132 is distributed between the inner ring member 11 and the panels 131, and a layer of energy-absorbing units 132 is distributed between two adjacent layers of panels 131; a support plate 1321 and a connecting plate 1322 distributed along the length direction of the panel 131 are connected between the outer ring member 12 and the panel 131, a support plate 1321 and a connecting plate 1322 are connected between the inner ring member 11 and the panel 131, a support plate 1321 and a connecting plate 1322 are connected between two adjacent layers of panels 131, and the connecting plate 1322 is positioned on at least one side of the support plate 1321; the weak portion 13211 in the support plate 1321 breaks or deforms after the inner ring member 11 is subjected to blade impact.
In this embodiment, under the condition that the fan blade works normally, the supporting plate 1321 enhances the structural rigidity of the fan casing, provides support between the panel 131 and the adjacent panel 131 or the inner ring member 11 or the outer ring member 12, and can be seen in the dashed line part in fig. 3, which shows a schematic structural diagram of a part of the energy absorbing layer of the fan casing before the inner ring member 11 is impacted by the blade; after the fan blades are broken, the broken pieces collide with the inner ring member 11 outwards (along the direction of the arrow below the inner ring member 11 in fig. 1) with a great impact force, that is, a force F shown in fig. 1 acts on the inner ring member 11, the weak portions 13211 in the support plate 1321 are broken or deformed, and the distances between the panel 131, the inner ring member 11 and the panel 131, and between the outer ring member 12 and the panel 131 on both sides of the support plate 1321 are shortened, so that the connection plate 1322 can be deformed, and the negative poisson's ratio effect can be realized. After the force is transferred to the outer ring member 12, the reaction force is applied to the energy absorbing body 13, i.e. F as shown in FIG. 3 0 The area between the supporting plate 1321 and the connecting plate 1322 acting on the energy absorbing main body 13 in the panel 131 and the next layer of energy absorbing unit 132 is concave in the direction away from the fan casing, a tensile force is applied to the connecting plate 1322 positioned at the side edge of the supporting plate 1321 towards the stress position, the connecting plate 1322 is compressively bent and deformed and protrudes towards the direction close to the supporting plate 1321, the connecting plate 1322 gathers towards the impact area (see the solid line part in fig. 3, which shows the partial structure schematic diagram of the energy absorbing layer of the fan casing after the inner ring member 11 is impacted by the blades), a negative poisson ratio effect is generated, the impact force of the fan blade part is absorbed, so that the impact force of the fan blade on the fan casing containing ring is reduced, and the material concentration of the impact area can better resist the penetration of broken fan blades, absorb the impact energy of the broken fan blades and enhance the containing capacity of the fan casing.
As shown in fig. 4, the fan case energy absorbing layer 1 is adapted to a hard wall containment case, the fan case energy absorbing layer 1 being filled between the first containment ring 2 and the first abradable coating 3. As shown in fig. 5, the fan casing energy absorbing layer 1 is suitable for a soft wall containing casing, the fan casing energy absorbing layer 1 is filled between the second containing ring 4 and the second abradable coating 5, and a kevlar wrapping layer 6 is wrapped on the outer wall of the second containing ring 4.
The connection plate 1322 is an arc plate, and the middle of the connection plate 1322 protrudes toward the direction close to the support plate 1321. After the inner ring member 11 is impacted by the blades, the arc-shaped connecting plate 1322 can guide the deformation direction, and the effect of compression deformation of the connecting plate 1322 in the direction close to the supporting plate 1321 is better.
The two sides of the supporting plate 1321 are provided with connecting plates 1322, after the fan blades are broken, the broken blades act on the inner ring member 11 with the force F shown in figure 1, the weak part 13211 in the supporting plate 1321 is broken or deformed, and the force is transferred to the outer ring member 12 to react with the energy absorbing main body 13, namely F shown in figure 3 0 Acting on the energy-absorbing body 13, applying a tensile force to the connection plates 1322 at two sides of the support plate 1321 towards the stressed position, and compressing, bending and deforming the connection plates 1322 at two sides, and protruding towards the direction close to the support plate 1321, the connection plates 1322 at two sides of the support plate 1321 gather towards the impact area, namely, the connection plates 1322 gather towards the middle along the arrow directions at the left side and the right side in fig. 1, so that the capacity of containing the fan casing is further enhanced.
As shown in fig. 1 and 2, the panel 131 has a recess 1311, two ends of the recess 1311 are respectively connected with the support plate 1321 and the connection plate 1322 in the next energy absorbing unit 132, and a connection part between the recess 1311 and the connection plate 1322 of the previous energy absorbing unit 132 protrudes in a direction away from the fan case. After the inner ring member 11 is impacted by the blades, the concave portion 1311 can guide the deformation direction, the curvature of the concave portion 1311 is increased, and further, the pulling force is applied to the lateral connecting plate 1322, so that the deformation effect of the connecting plate 1322 is better.
The connection plate 1322 is spaced apart from the support plate 1321. By adopting the structure, the space of the cavity 1323 formed by the support plate 1321, the connecting plate 1322, the panel 131, the adjacent panel 131 or the outer ring member 12 or the inner ring member 11 is enlarged, and when the connecting plate 1322 deforms, the space for the deformation of the connecting plate 1322 is larger, so that stronger deformation energy absorbing capability can be obtained.
As shown in fig. 1, the support plate 1321 is provided along the radial direction of the fan casing.
In other embodiments, the support plate 1321 extends obliquely, the oblique direction of the support plate 1321 being coincident with the rotational direction of the blade.
The supporting plate 1321 is provided with a groove to form the weak portion 13211, in other words, the thickness of the weak portion 13211 area of the supporting plate 1321 is thinner than other areas, which is convenient for processing. Preferably, both sides of the support plate 1321 are notched to form the weak portion 13211.
In other embodiments, holes are formed in the support plate 1321 to form the weaknesses 13211 to facilitate processing.
The energy absorbing body 13 comprises at least two sizes of energy absorbing units 132, a backing plate 1321, webs 1322, panels 131, adjacent panels 131 or cavities 1323 defined in the outer ring member 12 or the inner ring member 11, the closer to the inner wall, the larger the cavities 1323. In other words, the cavity 1323 is formed by the support plate 1321, the connection plate 1322, the panel 131 and the adjacent panel 131 being enclosed, or by the support plate 1321, the connection plate 1322, the panel 131 and the outer ring member 12 being enclosed, or by the support plate 1321, the connection plate 1322, the panel 131 and the inner ring member 11 being enclosed. The energy absorbing units 132 with small cavities 1323 are close to the inner ring member 11, the energy absorbing units 132 with large cavities 1323 are close to the outer ring member 12, the small-scale energy absorbing units 132 close to the inner ring member 11 can provide enough rigidity, the large-scale energy absorbing units 132 close to the outer ring member 12 can have enough deformation energy absorbing capacity, the hollow rate is high, and the structure is light.
For example, as shown in fig. 1 and 2, the energy absorbing body 13 includes two sizes of energy absorbing units 132, respectively defined as a large-sized energy absorbing unit 132 and a small-sized energy absorbing unit 132, wherein a cavity 1323 in the large-sized energy absorbing unit 132 is larger than a cavity 1323 in the small-sized energy absorbing unit 132, the large-sized energy absorbing unit 132 near the outer ring member 12 is provided with two layers, and the small-sized energy absorbing unit 132 near the inner ring member 11 is provided with four layers.
In each layer of energy absorbing body 13, the plurality of energy absorbing units 132 are uniformly distributed along the circumferential direction of the fan casing.
The fan case energy absorbing layer 1 is formed through an additive manufacturing process. The manufacturing feasibility is realized by adopting an additive manufacturing process, metal powder (such as aluminum alloy) is used as a raw material, the fan casing energy-absorbing layer 1 is deposited layer by layer through laser melting/rapid solidification, the fan casing energy-absorbing layer 1 is integrally formed, the structural reliability of the fan casing energy-absorbing layer 1 can be ensured, and the fan casing energy-absorbing layer 1 can be filled along with the shape of the fan casing; in addition, the processing personnel can process the thickness difference in different regions in the fan case energy-absorbing layer 1 according to actual needs.
The material of the fan case energy absorbing layer 1 is aluminum alloy, so that the structure of the fan case energy absorbing layer 1 is light.
The embodiment of the invention also provides an aeroengine, which comprises the fan casing energy absorbing layer 1 according to any embodiment.
The embodiment of the invention also provides an aircraft, which comprises the aeroengine.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (12)

1. The fan casing energy absorbing layer is arranged on the inner wall of the fan casing and is characterized by comprising an inner ring member and an outer ring member, wherein the inner ring member is arranged away from the inner wall relative to the outer ring member, and an energy absorbing main body is filled between the inner ring member and the outer ring member;
the energy absorbing body comprises at least one layer of panel, energy absorbing units distributed along the length direction of the panel are arranged between the outer ring member and the panel, between two adjacent panels and between the panel and the inner ring member, each energy absorbing unit comprises a supporting plate provided with a weak part and a connecting plate positioned on at least one side of the supporting plate, two ends of the supporting plate and two ends of the connecting plate are respectively connected with the panel and the adjacent panel or the inner ring member or the outer ring member, the weak part is arranged in the supporting plate after the inner ring member is impacted by blades, and the weak part can be broken or deformed in the supporting plate, so that the distance between the panel, the inner ring member, the panel, the outer ring member and the panel positioned on two sides of the supporting plate is reduced.
2. The fan case energy absorbing layer of claim 1, wherein the connection plate is an arc plate, and a middle portion of the connection plate protrudes in a direction approaching the support plate.
3. The fan case energy absorbing layer of claim 1, wherein the connection plates are provided on both sides of the support plate.
4. The energy absorbing layer of a fan casing according to claim 1, wherein the panel has a concave portion, two ends of the concave portion are respectively connected with the support plate and the connection plate in the energy absorbing unit of the next layer, and a connection position of the concave portion with the connection plate of the energy absorbing unit of the previous layer protrudes in a direction away from the fan casing.
5. The fan case energy absorbing layer of claim 1, wherein the web is spaced from the support plate.
6. The fan case energy absorbing layer of claim 1, wherein the support plate is provided with a groove to form the weak part;
or, an aperture in the support plate to form the frangible portion.
7. The fan case energy absorbing layer of claim 1, wherein the energy absorbing body comprises at least two sizes of energy absorbing units, the cavity defined by the support plate, the connection plate, the panel, adjacent the panel, or the outer ring member or the inner ring member being larger as the cavity is closer to the inner wall.
8. The fan case energy absorbing layer of claim 1, wherein a plurality of the energy absorbing units are uniformly distributed along a circumferential direction of the fan case in each layer of the energy absorbing body.
9. The fan case energy absorbing layer of claim 1, wherein the fan case energy absorbing layer is formed by an additive manufacturing process.
10. The fan case energy absorbing layer of any of claims 1-9, wherein the material of the fan case energy absorbing layer is an aluminum alloy.
11. An aircraft engine, characterized in that it comprises a fan casing energy absorbing layer according to any one of claims 1-10.
12. An aircraft, characterized in that it comprises an aeroengine as claimed in claim 11.
CN202211042974.7A 2022-08-29 2022-08-29 Fan casing energy absorbing layer, aeroengine and aircraft Pending CN117662252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211042974.7A CN117662252A (en) 2022-08-29 2022-08-29 Fan casing energy absorbing layer, aeroengine and aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211042974.7A CN117662252A (en) 2022-08-29 2022-08-29 Fan casing energy absorbing layer, aeroengine and aircraft

Publications (1)

Publication Number Publication Date
CN117662252A true CN117662252A (en) 2024-03-08

Family

ID=90073856

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211042974.7A Pending CN117662252A (en) 2022-08-29 2022-08-29 Fan casing energy absorbing layer, aeroengine and aircraft

Country Status (1)

Country Link
CN (1) CN117662252A (en)

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