Three-dimensional weaving structure and design method of a composite material intake cowl preform

Abstract

The application discloses a three-dimensional weaving structure of a composite air inlet casing preform and a design method of the three-dimensional weaving structure. The structure comprises an inner ring, an outer ring and a plurality of support plates. The inner ring, the outer ring and the plurality of support plates are all woven by yarns, wherein the yarns comprise warp yarns and weft yarns; the yarns surrounding the inner ring and the outer ring of the composite air inlet casing preform and penetrating through the support plates of the air inlet casing preform are the warp yarns; and the yarns along the axial direction of the concentric ring air inlet casing preform are the weft yarns. Thus, the three-dimensional weaving technology is applied to the forming of the composite air inlet casing preform, and the weight reduction of the mass of the air inlet casing and the integration of the structure are realized compared with the existing metal air inlet casing and the laminated composite air inlet casing.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of composite material preform forming, and particularly relates to a three-dimensional weaving structure design of a composite material inlet casing preform. BACKGROUND

[0002] The inlet casing frame structure of the aero-engine inlet casing is a load-bearing frame of the engine, such as the inlet casing frame structure disclosed in the patent application with the publication number CN111486004A, which comprises an inner ring, an outer ring and a plurality of connecting plates connecting the inner ring and the outer ring.

[0003] Generally, the inlet casing frame structure is made of metal material or laminated composite material. The metal material product has large quality, which greatly limits the thrust-to-weight ratio of the aero-engine and restricts the development of the aircraft. The traditional laminated composite material inlet casing component has poor interlayer performance, and the connecting effect between the inner ring, the outer ring and the connecting plate is poor, which affects the overall performance of the engine.

[0004] Therefore, a new technical solution is needed to solve the above problems. SUMMARY

[0005] The present application provides a three-dimensional weaving structure design of a composite material inlet casing preform, which can be woven by composite material.

[0006] Technical scheme: In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A three-dimensional weaving structure of a composite material inlet casing preform, comprising an inner ring, an outer ring and a plurality of connecting plates, the inner ring and the outer ring are concentric rings, the connecting plates are connected between the inner ring and the outer ring, characterized in that the inner ring, the outer ring and the plurality of connecting plates are all woven by yarn, wherein the yarn comprises warp yarn and weft yarn; the yarn around the inner ring, the outer ring of the composite material inlet casing preform and passing through the connecting plate of the inlet casing preform is the warp yarn; the yarn along the axial direction of the concentric ring inlet casing preform is the weft yarn.

[0008] Further, the yarn of the composite material inlet casing preform comprises four paths, the first path is introduced from one end of the outer ring of the inlet casing preform, and passes around the outer ring of the inlet casing preform to the other end of the outer ring; the second path is introduced from the outer ring of the inlet casing preform, passes through the connecting plate of the inlet casing, passes around the inner ring of the inlet casing preform, and then passes through the connecting plate and out of the outer ring of the preform; the third path is introduced from the outer ring of the preform, directly passes into the inner ring by skipping the connecting plate, and then passes through the connecting plate and into the outer ring; the fourth path is introduced from the outer ring of the preform, passes through the connecting plate, passes into the inner ring, and then directly passes into the outer ring by skipping the connecting plate.

[0009] Further, the three-dimensional organizational structure used by the outer ring, the support plate and the inner ring of the intake manifold preform comprises one or more of the three-dimensional orthogonal organizational structure, the three-dimensional interlaminar angle interlocking organizational structure and the three-dimensional through angle interlocking organizational structure.

[0010] Further, the number of the support plates is six, eight or twelve.

[0011] Further, the size and thickness of the inner ring, the outer ring and the support plate are adjusted by changing the interlaced length and the number of layers of the yarns.

[0012] The application also provides a three-dimensional weaving organizational structure design method for the composite intake manifold preform.

[0013] The yarns around the inner ring, the outer ring of the composite intake manifold preform and the support plate of the intake manifold preform are used as the warp yarns, and the yarns along the axial direction of the concentric ring of the intake manifold preform are used as the weft yarns.

[0014] Further, four paths are designed to guide the yarns, the first path is introduced from one end of the outer ring of the intake manifold preform, and is guided around the outer ring of the intake manifold preform to the other end of the outer ring; the second path is introduced from the outer ring of the intake manifold preform, is guided through the support plate of the intake manifold, is guided around the inner ring of the intake manifold preform, and is guided out of the outer ring of the intake manifold preform through the support plate; the third path is introduced from the outer ring of the intake manifold preform, is directly guided into the inner ring by skipping the support plate, and is guided out of the outer ring through the support plate; and the fourth path is introduced from the outer ring of the intake manifold preform, is guided into the inner ring through the support plate, is directly guided into the outer ring by skipping the support plate.

[0015] Further, the three-dimensional organizational structure used by the outer ring, the support plate and the inner ring of the intake manifold preform comprises one or more of the three-dimensional orthogonal organizational structure, the three-dimensional interlaminar angle interlocking organizational structure and the three-dimensional through angle interlocking organizational structure.

[0016] Further, the size and thickness of the inner ring, the outer ring and the support plate are adjusted by changing the interlaced length and the number of layers of the yarns.

[0017] Further, the yarns at the head and tail of the composite intake manifold preform and around the composite intake manifold preform are not involved in the interlacing, and the composite intake manifold preform is prepared into a whole through the post-processing procedures of pasting and sewing.

[0018] Advantages: Compared with the prior art, the application has the following advantages:

[0019] 1. The composite air intake casing preform three-dimensional weaving structure and design method provided by the application applies three-dimensional weaving technology to the forming of the composite air intake casing preform, and realizes the lightweight of the air intake casing and the integration of the structure compared with the existing metal air intake casing and laminated composite air intake casing.

[0020] 2. The composite air intake casing preform three-dimensional weaving structure design method based on a flat loom can realize design method verification on an ordinary flat loom, reduces the requirements on equipment, makes the forming weaving of the composite air intake casing preform more convenient, and is also beneficial to the batch production of the preform. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the composite air intake casing preform three-dimensional weaving structure before sewing in the application.

[0022] Figure 2 It is a three-dimensional fabric yarn interweaving warp section view of the composite air intake casing preform three-dimensional weaving structure in the application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the application will be further described in detail below in combination with the drawings and examples. It should be noted that the specific examples described here are only used to explain the application, and are not used to limit the application.

[0024] Example 1

[0025] Please combine Figure 1 and Figure 2 shown, the embodiment discloses a composite air intake casing preform three-dimensional weaving structure, which comprises an inner ring 100, an outer ring 200 and a plurality of support plates 300. The inner ring 100 and the outer ring 200 are concentric circular rings. The support plates 300 are connected between the inner ring 100 and the outer ring 200 and a plurality of support plates 300 are unfolded outward along the same center. The number of the support plates can be selected as six support plates, eight support plates or twelve support plates. Six support plates are selected in the embodiment. The inner ring 100, the outer ring 200 and the plurality of support plates 300 are all woven by yarns. The yarns comprise warp yarns and weft yarns, the yarns around the inner ring 100 and the outer ring 200 of the composite air intake casing preform and the yarns through the support plates 300 of the air intake casing preform are the warp yarns, and the yarns in the axial direction of the concentric circular ring air intake casing preform are the weft yarns. In the embodiment, the yarns numbered 1-14 are the warp yarns, and the yarn numbered 15 is the weft yarn. Figure 1

[0026] ​The yarns of the composite air intake casing preform described above include four paths, the first path is introduced from one end of the outer ring of the air intake casing preform, and is wound around the outer ring of the air intake casing preform for half a circle to the other end of the outer ring; the second path is introduced from the outer ring of the air intake casing preform, passes through the support plate of the air intake casing, is wound around the inner ring of the air intake casing preform, and then passes through the support plate and out of the outer ring of the preform; the third path is introduced from the outer ring of the preform, directly passes into the inner ring by skipping the support plate, and then passes through the support plate and out of the outer ring; and the fourth path is introduced from the outer ring of the preform, passes through the support plate, passes into the inner ring, and then directly passes into the outer ring by skipping the support plate. For example, in Figure 1 the warp yarns 7, 8, 5 pass through the lower half of the circular ring, the warp yarns 10, 11, 12 pass through the upper half of the circular ring, the warp yarns 1, 2 and 13, 14 pass into the circular ring from the lower left and upper left of the circular ring respectively, and pass out of the tail end of the circular ring, and the warp yarns 6, 7, 8, 9 pass into the circular ring from the head end of the circular ring and pass out of the upper right and lower right of the circular ring. The warp yarns 1, 2, 13, 14, 6, 7, 8, 9 pass through the inner and outer rings of the circular ring and the support plate.

[0027] Embodiment Two

[0028] The embodiment provides a design method of a three-dimensional weaving structure of a composite air intake casing preform, which corresponds to the three-dimensional weaving structure of the composite air intake casing preform in Embodiment One.

[0029] The design method takes the yarns around the inner ring 100, the outer ring 200 of the composite air intake casing preform and passing through the support plate 300 of the air intake casing preform as warp yarns, and takes the yarns along the axial direction of the concentric circular ring air intake casing preform as weft yarns.

[0030] The three-dimensional weaving structure used by the outer ring 200, the support plate 300 and the inner ring 100 of the air intake casing preform includes one or more of a three-dimensional orthogonal weaving structure, a three-dimensional interlaced angle interlocking weaving structure and a three-dimensional penetrating angle interlocking weaving structure. The size and thickness of the inner ring, the outer ring and the support plate are adjusted by changing the interlacing length and layer parameters of the yarns of the inner ring 100, the outer ring 200 and the support plate 300. There are yarns not participating in interlacing at the head and tail and around the composite air intake casing preform, and the composite air intake casing preform is prepared into a whole through a post-processing process of pasting and sewing.

[0031] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiment. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and refinements without departing from the principles of the present application shall be considered as falling within the protection scope of the present application.

Claims

1. A three-dimensional woven structure of a composite material inlet cowl preform, comprising an inner ring, an outer ring and a plurality of support plates, the inner ring and the outer ring being concentric rings, the support plates being connected between the inner ring and the outer ring, characterized in that, The inner ring, the outer ring and the several support plates are all woven by yarns, wherein the yarns include warp yarns and weft yarns; the yarns around the inner ring, the outer ring of the composite air inlet casing preform and the support plates of the air inlet casing preform are the warp yarns; the yarns along the axial direction of the concentric ring air inlet casing preform are the weft yarns. The yarns of the composite air inlet casing preform include four paths, the first path is introduced from one end of the outer ring of the air inlet casing preform, and is wound around the outer ring of the air inlet casing preform to the other end of the outer ring; the second path is introduced from the outer ring of the air inlet casing preform, passes through the support plate of the air inlet casing, is wound around the inner ring of the air inlet casing preform, and then passes through the support plate to be taken out from the outer ring of the preform; the third path is introduced from the outer ring of the preform, directly passes into the inner ring by skipping the support plate, and then passes through the support plate to be taken out from the outer ring; the fourth path is introduced from the outer ring of the preform, passes through the support plate, passes into the inner ring, and then directly passes into the outer ring by skipping the support plate.

2. The composite inlet manifold preform three-dimensional woven organization structure according to claim 1, characterized in that, The three-dimensional organizational structure used by the outer ring, the support plate and the inner ring of the air inlet casing preform includes one or several of three-dimensional orthogonal organizational structure, three-dimensional interlaminar angle interlocking organizational structure and three-dimensional penetrating angle interlocking organizational structure.

3. The composite inlet-cowl preform three-dimensional woven organization structure according to claim 1, characterized in that, The number of the support plates is six, eight or twelve.

4. The composite inlet manifold preform three-dimensional woven organization structure according to claim 3, characterized in that, The size and thickness of the inner ring, the outer ring and the support plate are adjusted by changing the interweaving length and the layer number of the yarns of the inner ring, the outer ring and the support plate.

5. A method for designing a three-dimensional woven structure of a composite material inlet cowl preform, characterized in that, The three-dimensional weaving organizational structure of the composite air inlet casing preform includes an inner ring, an outer ring and several support plates, the inner ring and the outer ring are concentric rings, and the support plates are connected between the inner ring and the outer ring; the yarns around the inner ring, the outer ring of the composite air inlet casing preform and the support plates of the air inlet casing preform are the warp yarns, and the yarns along the axial direction of the concentric ring air inlet casing preform are the weft yarns; Four paths are designed for yarn introduction, the first path is introduced from one end of the outer ring of the air inlet casing preform, and is wound around the outer ring of the air inlet casing preform to the other end of the outer ring; the second path is introduced from the outer ring of the air inlet casing preform, passes through the support plate of the air inlet casing, is wound around the inner ring of the air inlet casing preform, and then passes through the support plate to be taken out from the outer ring of the preform; the third path is introduced from the outer ring of the preform, directly passes into the inner ring by skipping the support plate, and then passes through the support plate to be taken out from the outer ring; the fourth path is introduced from the outer ring of the preform, passes through the support plate, passes into the inner ring, and then directly passes into the outer ring by skipping the support plate.

6. The method of designing a three-dimensional woven organizational structure of a composite inlet cowl preform according to claim 5, wherein The three-dimensional organizational structure used by the outer ring, the support plate and the inner ring of the air inlet casing preform includes one or several of three-dimensional orthogonal organizational structure, three-dimensional interlaminar angle interlocking organizational structure and three-dimensional penetrating angle interlocking organizational structure.

7. The method of designing a three-dimensional woven organizational structure of a composite inlet cowl preform according to claim 5, wherein The size and thickness of the inner ring, the outer ring and the support plate are adjusted by changing the interweaving length and the layer number of the yarns of the inner ring, the outer ring and the support plate.

8. The method of designing a three-dimensional woven organizational structure of a composite inlet cowl preform according to claim 5, wherein There are yarns not participating in interweaving at the head and tail and around the composite air inlet casing preform, and the composite air inlet casing preform is prepared into a whole through the post-processing procedures of pasting and sewing.

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