CN215943746U

CN215943746U - Three-dimensional woven composite material engine air inlet cover

Info

Publication number: CN215943746U
Application number: CN202120255518.5U
Authority: CN
Inventors: 伍立立; 李茂源; 张典堂
Original assignee: YIXING XINLI WEAVING CO Ltd
Current assignee: YIXING XINLI WEAVING CO Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-03-04
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a three-dimensional woven composite material engine intake hood, which comprises an integrated 2.5D three-dimensional woven member and a high-temperature-resistant resin substrate impregnated and cured on the 2.5D three-dimensional woven member, so that the whole intake hood is an integrated braiding and forming interlayer-free connecting structure; the 2.5D three-dimensional weaving component comprises an installation seat, a transition section, a base body section and an air inlet section which are sequentially arranged, wherein the section radius of the transition section is gradually reduced along the direction from the installation seat to the base body section, and the section radius of the air inlet section is gradually increased along the direction from the installation seat to the base body section. The utility model combines the 2.5D three-dimensional weaving integrated structure design with the resin transfer molding process, achieves the purposes of reducing weight, improving bearing capacity, reducing deformation, having good high-temperature resistance and the like of the air inlet hood, avoids the defect of interlayer connection, and realizes the integrated design of the air inlet hood structure.

Description

Three-dimensional woven composite material engine air inlet cover

Technical Field

The utility model relates to the technical field of engine intake hoods, in particular to a three-dimensional woven composite material engine intake hood.

Background

The air inlet cover of the aero-engine belongs to a solid structure with a complex structure, a large size and no gap, is an important protection component on the aero-engine, and can be subjected to pressure brought by different environments and a large amount of heat generated by combustion in the engine in the service process of the engine. In order to improve the bearing and deformation resistance of the air intake cover in different pressure environments and improve the heat resistance and service time of the air intake cover, new air intake cover materials are continuously explored in various countries.

The traditional aero-engine air inlet cover is made of metal materials, the structural design is complex, the deformation resistance of the air inlet cover can be affected by the connection defects of structural parts, the air inlet cover can be damaged under a large stress condition, the density of the metal materials is high, the lightweight design of the air inlet cover is difficult to achieve, and unnecessary burden is brought to space flight. In order to reduce the weight of the air inlet hood of the engine and realize the safe and stable operation of an aircraft engine system, the air inlet hood of the aircraft engine not only needs to adapt to light weight, but also can bear complex pressure in space, so that the problem that the structural part of the air inlet hood of the aircraft engine with low density, high strength and high ductility is urgently needed to be solved is researched and developed.

The composite material air inlet cover has the advantages of light weight, high rigidity, strong designability and the like, can realize the integrated design of prefabricated parts, and avoids the occurrence of connection defects, but the existing carbon fiber composite material mostly adopts the processes of laminating die pressing and the like, so that the combination between fiber arrangement structural layers is weak, and the manufacturing process is complex and tedious.

In view of the problems, the 2.5D weaving technology is combined with the resin transfer molding technology to realize vacuum rapid curing molding of the 2.5D woven carbon fiber composite air inlet hood, the 2.5D weaving technology effectively improves the stability of the whole structure of the landing gear, eliminates the problem of interface bonding fastness between structural members, and meets the structural strength requirements of the composite material air inlet hood of the aeroengine in different application places.

Disclosure of Invention

The purpose of the utility model is as follows: in order to overcome the defects of the prior art, the utility model provides the three-dimensional woven composite material engine intake hood, which adopts a 2.5D three-dimensional woven integrated structure design and a preparation method of resin transfer molding, introduction, curing and forming, and achieves the purposes of reducing weight, improving bearing capacity, reducing deformation, good high-temperature resistance and the like.

The technical scheme is as follows: in order to achieve the purpose, the utility model provides a three-dimensional woven composite material engine intake cover, which comprises an integrated 2.5D three-dimensional woven member and a high-temperature-resistant resin substrate which is impregnated and cured on the 2.5D three-dimensional woven member, so that the whole intake cover is an integrated braiding and forming non-interlayer connecting structure.

Further, the 2.5D three-dimensional weaving component comprises a mounting seat, a transition section, a base body section and an air inlet section which are arranged in sequence, wherein the section radius of the transition section is gradually reduced along the direction from the mounting seat to the base body section, and the section radius of the air inlet section is gradually increased along the direction from the mounting seat to the base body section.

Furthermore, the transition section and the air inlet section are woven by combining a 2.5D three-dimensional weaving technology with a yarn adding and reducing process, so that the preparation of the integrated prefabricated member is realized.

Furthermore, in order to improve the connecting capacity of the air inlet cover and the engine, a plurality of process holes are formed in the mounting seat and are woven by combining a 2.5D three-dimensional weaving technology with a pre-buried process.

Furthermore, the number of the process holes on the mounting seat is 5-8, and the process holes are uniformly distributed along the circumference.

Further, the 2.5D three-dimensional woven component adopts one or more of 2.5D layer-by-layer orthogonal angle interlocking, lining layer-by-layer orthogonal angle interlocking, layer-by-layer diagonal angle interlocking and lining layer-by-layer diagonal angle interlocking structure.

Further, the fiber volume content in the 2.5D three-dimensional woven structure is 50 to 60%.

Further, the air inlet cover is prepared by adopting a vacuum auxiliary technology or an RTM composite forming process.

Has the advantages that: compared with the prior art, the 2.5D woven composite material engine intake cover provided by the utility model has the following advantages:

(1) according to the requirements of different section radiuses of the air inlet cover of the aero-engine, the 2.5D three-dimensional weaving technology is adopted to perform yarn adding and reducing design on the air inlet cover parts with different section radiuses, and interlayer connection of different parts is not needed, so that the integrated weaving design of the air inlet cover of the aero-engine is realized, the defect of interlayer connection is avoided, the rigidity and the strength of specific parts at variable sections can be improved in a targeted manner, and the bearing capacity and the deformation resistance of the air inlet cover are improved.

(2) Through the design of presetting the fabrication hole at the connecting part of the air inlet hood and the engine, the energy circulation is facilitated to be smoother, the heat resistance of the air inlet hood is increased, the lightweight design of the air inlet hood can be realized, the high heat resistance and the lightweight design of the aero-engine are realized, and the connecting position with the engine is provided.

(3) The matrix adopts high-temperature resistant thermosetting resin as the matrix, and adopts a vacuum auxiliary process or a resin transfer molding process to realize the rapid impregnation of the resin glue solution on the three-dimensional structure of the fiber, so that the composite material product has high forming efficiency and compact preparation, and most importantly, the air inlet cover has good high-temperature resistance.

Drawings

The present invention will be further described and illustrated with reference to the following drawings.

FIG. 1 is a schematic overall structure of a preferred embodiment of the present invention;

FIG. 2 is a front view of a preferred embodiment of the present invention;

FIG. 3 is a bottom view of the preferred embodiment of the present invention;

the parts in the drawings are numbered as follows: 1. a mounting seat; 2. a transition section; 3. a base section; 4. an air intake section; 5. and (5) processing holes.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings to more clearly and completely illustrate the technical solutions of the present invention.

Examples

As shown in fig. 1-3, a preferred embodiment of the three-dimensional woven composite material engine intake cover comprises an integrated 2.5D three-dimensional woven member and a high-temperature resistant resin substrate impregnated and cured on the 2.5D three-dimensional woven member, so that the whole intake cover is an integrated braiding-molding interlayer-free connecting structure.

Further, the 2.5D three-dimensional machine weaving component includes mount pad 1, changeover portion 2, base member section 3, the section of admitting air 4 that sets gradually, the section radius of changeover portion 2 reduces along the direction of mount pad 1 to base member section 3 gradually, the section radius of the section of admitting air 4 increases along the direction of mount pad 1 to base member section 3 gradually, in this embodiment mount pad 1, base member section 3 are the equiaxial section, and the component thickness is unanimous.

Furthermore, the transition section 2 and the air inlet section 4 are woven by combining a 2.5D three-dimensional weaving technology with a yarn adding and reducing technology, so that the preparation of an integrated prefabricated member is achieved, and then the prefabricated member and the high-temperature-resistant resin substrate are subjected to composite forming by a vacuum auxiliary technology or an RTM technology.

Furthermore, in order to improve the connecting capacity of the air inlet cover and the engine, 5-8 process holes 5 which are uniformly distributed along the circumference are formed in the mounting seat 1, the process holes 5 are formed by weaving through a 2.5D three-dimensional weaving technology and a pre-embedding technology, and the process holes 5 penetrate through the transition section 2.

Further, the 2.5D three-dimensional woven member adopts one or more of 2.5D layer-by-layer orthogonal angle interlocking, lining layer-by-layer orthogonal angle interlocking, layer-by-layer diagonal angle interlocking and lining layer-by-layer diagonal angle interlocking structures, wherein the fiber volume content is 50-60%.

The 2.5D woven composite engine inlet cowl in the preferred embodiment described above is prepared by the following method:

(1) according to the overall shape of the air inlet cover and the assembly requirements of components, the three-dimensional woven structure design of the air inlet cover is carried out, and the air inlet cover comprises a section radius reduction area (transition section) and a section radius increase area (air inlet section);

(2) in the process of preparing the prefabricated member by applying a 2.5D three-dimensional weaving technology, the prefabricated member can be woven from a bottom mounting seat to the top of an air inlet cover, a section radius reducing part is prepared by reducing the section radius of the prefabricated member by a method of reducing warps in an aligned mode, then a section radius increasing part is prepared by increasing the radius structure of the section of the prefabricated member by a method of increasing yarns in a gradual aligned mode (the prefabricated member can also be processed in the opposite direction, a yarn adding area is changed into yarn reduction when the prefabricated member is processed in the opposite direction, and a yarn reducing area is changed into yarn addition), and a fabrication hole is preset to be designed through a pre-adding mold;

(3) the air inlet cover is integrally woven according to the requirement of a 2.5D three-dimensional weaving structure by controlling the weaving path of the carbon fiber yarn carrier, and T700 carbon fiber bundle-shaped twisted yarns are selected as integral yarns of the prefabricated body variable cross-section weaving technology;

(4) the 2.5D woven composite material air inlet cover is prepared by taking high-temperature resistant thermosetting resin glue solution as a matrix and adopting a vacuum auxiliary technology or RTM technology resin composite molding process.

The high temperature resistant thermosetting resin used in the composite molding process includes but is not limited to polyimide, phthalonitrile, bismaleimide and cyanate, a specific stepped temperature rise curing process is formulated according to the thermal property of the thermosetting resin, the temperature rise process is carried out in a large oven, the thermosetting temperature is 80-120 ℃, and the curing time is 5-12 hours.

The utility model adopts the structural design of carbon fiber 2.5D three-dimensional weaving and the preparation method of resin transfer molding introduction curing molding, achieves the purposes of reducing weight, increasing bearing capacity, reducing deformation, having good high temperature resistance and the like of the air inlet hood, solves the problem of poor original interlayer connection performance of the prefabricated member, realizes the integrated design of the air inlet hood structure, and reduces the problems of inevitable defects and the like when designing structural members.

The above detailed description merely describes preferred embodiments of the present invention and does not limit the scope of the utility model. Without departing from the spirit and scope of the present invention, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents. The scope of the utility model is defined by the claims.

Claims

1. The engine intake hood is characterized by comprising an integrated 2.5D three-dimensional woven component and a high-temperature-resistant resin substrate impregnated and cured on the 2.5D three-dimensional woven component; the 2.5D three-dimensional woven member comprises a mounting seat (1), a transition section (2), a base body section (3) and an air inlet section (4), wherein the mounting seat (1), the transition section (2), the base body section (3) and the air inlet section (4) are sequentially arranged, the section radius of the transition section (2) is gradually reduced along the direction from the mounting seat (1) to the base body section (3), and the section radius of the air inlet section (4) is gradually increased along the direction from the mounting seat (1) to the base body section (3).

2. The engine intake cover made of three-dimensional woven composite materials according to claim 1, wherein the transition section (2) and the intake section (4) are woven by combining a 2.5D three-dimensional weaving technology with a yarn adding and subtracting process.

3. The engine intake hood made of three-dimensional woven composite materials as claimed in claim 1, wherein the mounting base (1) is provided with a plurality of fabrication holes (5), and the fabrication holes (5) are woven by combining 2.5D three-dimensional weaving technology with pre-embedding technology.

4. The engine intake hood made of three-dimensional woven composite materials according to claim 3, wherein the number of the fabrication holes (5) on the mounting seat (1) is 5-8, and the fabrication holes are uniformly distributed along the circumference.

5. The woven composite tridimensional engine intake cover according to claim 1, characterized in that said 2.5D tridimensional woven members employ one or more of 2.5D layer by layer orthogonal angle interlocking, lined layer by layer orthogonal angle interlocking, layer by layer diagonal angle interlocking, lined layer by layer diagonal angle interlocking.

6. The air intake cover of the three-dimensional woven composite material engine as claimed in claim 1, wherein the fiber volume content of the 2.5D three-dimensional woven structure is 50-60%.

7. The air intake cover of the engine made of the three-dimensional woven composite material according to the claim 1, wherein the air intake cover is prepared by a vacuum auxiliary technology or a RTM composite forming process.