Corrugated plate

Abstract

The invention discloses a corrugated plate which comprises a corrugated curved surface, a fading curved surface, a plane structure and a turnup, the corrugated curved surface is composed of a plurality of curved surfaces which are parallel to one another and have semicircular or approximately semicircular cross sections, and the fading curved surface is composed of a plurality of curved surfaces which are parallel to one another and have gradually changing cross section shapes. The first end of the fading type curved surface is connected with the corrugated curved surface, the section of the joint is semicircular or tends to be semicircular, the section of the second end of the fading type curved surface is a straight line, the first end of the plane structure is connected with the second end of the fading type curved surface, and the flanging is connected with the second end of the plane structure. And an included angle is formed between the turned-over edge and the plane structure. When the corrugated plate serves as a cold edge corrugated plate of the annular radiator, the weight reduction requirement of the annular radiator can be met under the condition that the product strength of the annular radiator is met.

Description

Technical Field

[0001] The invention belongs to the technical field of rotating body aircraft, in particular to corrugated plate parts and connection and assembly structures thereof in special material aircraft. Background Art

[0002] With the improvement of the comprehensive performance indicators of aircraft, the requirements of the main engine customers for the various indicators of the supporting accessories (i.e. the products produced, processed and delivered by the accessory factory) have also increased significantly. For the annular radiator installed between the aircraft air inlet and the engine (for example, the Chinese invention patents CN117308667A annular radiator and CN117346561A a high-efficiency annular radiator and heat exchange method both record the use of corrugated plates as cold-edge corrugated plates in annular radiators), weight reduction indicators are one of the core indicators. Due to the large size of the annular radiator and the special installation position, the product must ensure strength requirements while ensuring light weight. Although the conventional stainless steel structure meets the strength requirements, the weight reduction requirements cannot be met.

[0003] Therefore, it is a feasible solution to choose a lightweight material to replace the original stainless steel material to form the core parts of the product (cold edge corrugated plate). Among the existing materials, titanium alloy is a lightweight and high-strength material, so it can be used as an alternative to stainless steel. Figure 3 As shown in the figure, the existing stainless steel corrugated plate structure adopts the scheme of splicing two stainless steel plates of different thicknesses, wherein the material thickness at position D is δmm, the material thickness at position F is δ'mm, and the position E is the overlapping splicing position, the material with a thickness of δmm and the material with a thickness of δ'mm are overlapped and spliced, and then resistance welded to form a whole, and finally the spliced ​​materials are corrugated. However, if the forming scheme of stainless steel corrugated plates is used, the following problems will be encountered:

[0004] First, the overlapping and splicing of stainless steel materials is to form a connection structure with other parts and ensure the strength of the connection. After replacing with titanium alloy, if the original overlapping and splicing method is retained, the thickness will be too large, resulting in a large amount of titanium alloy material waste and unnecessary weight increase;

[0005] Second, the forming characteristics of titanium alloy are quite different from those of stainless steel. When corrugations are formed according to the thickness and overlapping splicing of stainless steel, cracking problems will occur at the edges. Summary of the invention

[0006] The present invention aims to provide a corrugated plate which can meet the weight reduction requirement of the annular radiator while meeting the product strength of the annular radiator, and also meets the molding requirements of the corrugated plate and the subsequent connection requirements with other parts.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A corrugated plate, comprising:

[0009] A corrugated surface, wherein the corrugated surface is composed of a plurality of parallel curved surfaces with a semicircular or semicircular cross-sectional shape;

[0010] A vanishing curved surface, wherein the vanishing curved surface is composed of a plurality of parallel curved surfaces with gradually changing cross-sectional shapes, wherein a first end of the vanishing curved surface is connected to the corrugated curved surface, and a cross-sectional shape of the connection is semicircular or tends to be semicircular, and a second end of the vanishing curved surface has a straight cross-sectional shape;

[0011] A planar structure, wherein a first end of the planar structure is connected to a second end of the vanishing curved surface;

[0012] The flange is connected to the second end of the planar structure, and an angle is formed between the flange and the planar structure.

[0013] As an option, the corrugated plate is made of titanium alloy.

[0014] As a solution, a cylindrical cold-edge corrugated plate of an annular radiator is formed by rolling along a direction parallel to the corrugated curved surface of the corrugated plate, and the cold-edge corrugated plate includes:

[0015] A main area consisting of a corrugated surface;

[0016] Two transition areas formed by vanishing surfaces, the two transition areas are respectively connected to the two ends of the main area;

[0017] Two extension areas formed by the plane structure, the two extension areas are respectively connected to the outer sides of the two transition areas;

[0018] Two flanges are respectively connected to the outer sides of the two extension areas.

[0019] Furthermore, the two flanges are turned toward the cylindrical outer cylindrical surface corresponding to the cold edge corrugated plate to form a structure for assembly and connection with other parts.

[0020] Furthermore, the area of ​​the main region is larger than the area of ​​the transition region, and the area of ​​the transition region is larger than the area of ​​the extension region.

[0021] Furthermore, the two flanges are both plane flanges.

[0022] Compared with the prior art, the present invention has the following characteristics:

[0023] 1) The complete corrugated structure of the existing corrugated plate is improved to a multi-curved surface structure composed of corrugated surface + fading surface + plane, which solves the edge cracking problem during the corrugation forming process of titanium alloy;

[0024] 2) The material state of the corrugated plate is changed from stainless steel to titanium alloy, which meets the requirements of lightweight and realizes the corrugated plate structure scheme suitable for titanium alloy corrugated forming;

[0025] 3) The raw material thickness of the corrugated plate is changed from the existing δmm+δ'mm overlapping combination to a single δmm, which greatly reduces the weight of the material, and the connection structure with other parts is adjusted to a flanging structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of the improved corrugated plate of the present invention;

[0027] Figure 2 for Figure 1 Enlarged views of corrugated surfaces, vanishing surfaces, flat structures, and flanges;

[0028] Figure 3 This is a three-dimensional schematic diagram of the corrugated plate before improvement of the present invention;

[0029] In the figure: 1-corrugated surface, 2-vanishing surface, 3-planar structure, 4-flanged edge. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0031] like Figure 3 As shown, it is a traditional stainless steel corrugated plate structure, the corrugated plate is made of two plates of different thicknesses spliced ​​and overlapped, and the profile only includes the corrugated curved surface 1.

[0032] like Figure 1 and Figure 2 As shown, a light-weight material gradually disappearing multi-curved corrugated plate structure designed by the present invention is formed. The corrugated plate has been rolled into a cylindrical cold edge corrugated plate used in an annular radiator, which includes:

[0033] Corrugated surface 1, the cross-sectional shape of the corrugated surface 1 is close to a semicircle, and the main function of this part of the structure is to increase the contact and heat dissipation area of ​​cold air and improve the heat dissipation efficiency;

[0034] The vanishing curved surface 2, which is a transition from the corrugated curved surface 1 to the flat surface 3;

[0035] The plane structure 3 is a transition from the vanishing curved surface 2 to the flange 4, which plays a role in ensuring the forming quality during the corrugated plate forming process. On the one hand, it avoids the cracking of the titanium alloy edge, and on the other hand, it is convenient to form the flange 4, because there is still a corrugated shape at one end of the vanishing curved surface 2, which cannot be directly flanged;

[0036] The flange 4 is a structure to ensure that the corrugated plate can be assembled with other parts after forming. That is, as an assembly structure, the folding direction of the flange 4 is toward the axis direction away from the cylindrical surface where the cold edge corrugated plate is located.

[0037] when Figure 1 and Figure 2 When the corrugated plate is applied to the annular radiator as the cold edge corrugated plate, the key to the lightweight material gradual disappearing multi-curved corrugated plate structure is that the cold edge corrugated plate can be completely formed into corrugations and reserve the assembly structure with other parts under the premise of selecting titanium alloy as the processing material. Due to the large difference in material properties between titanium alloy and stainless steel, titanium alloy materials of the same specifications are more difficult to form than stainless steel materials, and there is cracking. In addition, there is a lack of assembly structure with other parts on the annular radiator, and subsequent processing cannot be guaranteed. Therefore, it is necessary to improve the existing corrugated plate structure to meet its forming and assembly requirements.

[0038] The solution of the present invention is as follows:

[0039] 1) On the premise that the heat dissipation performance of the cold-edge corrugated plate meets the requirements, the formed curved surface begins to be changed at the edge of the curved surface structure of the corrugated plate, so that the wave cross section gradually decreases until it disappears, that is, the semicircular or semicircular cross-sectional shape of the corrugated curved surface 1 gradually transitions to a plane, and the curved surface of the transition section only requires a smooth transition, and there is no specific cross-sectional shape requirement;

[0040] 2) After the corrugated section of the cold edge corrugated plate disappears into a flat state, the flat state of this part of the cold edge corrugated plate is maintained for a certain length (a flat structure 3 of about 50 mm in length) to facilitate the forming of the flange 4;

[0041] 3) Flanging is performed on the cold edge corrugated plate at a length dimension of about 50 mm in the plane state.

[0042] 4) After the cold edge corrugated plate is formed, it is assembled with other parts through the flanges 4 at both ends, such as Figure 1 The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A corrugated plate, characterized in that: include: A corrugated surface, wherein the corrugated surface is composed of a plurality of parallel curved surfaces with a semicircular or semicircular cross-sectional shape; A vanishing curved surface, wherein the vanishing curved surface is composed of a plurality of parallel curved surfaces with gradually changing cross-sectional shapes, wherein a first end of the vanishing curved surface is connected to the corrugated curved surface, and a cross-sectional shape of the connection is semicircular or tends to be semicircular, and a second end of the vanishing curved surface has a straight cross-sectional shape; A planar structure, wherein a first end of the planar structure is connected to a second end of the vanishing curved surface; The flange is connected to the second end of the planar structure, and an angle is formed between the flange and the planar structure.

2. A corrugated plate according to claim 1, characterized in that: The corrugated plate is made of titanium alloy.

3. A corrugated plate according to claim 1, characterized in that: A cylindrical cold-edge corrugated plate of an annular radiator is formed by rolling in a direction parallel to the corrugated curved surface of the corrugated plate, and the cold-edge corrugated plate includes: A main area consisting of a corrugated surface; Two transition areas formed by vanishing surfaces, the two transition areas are respectively connected to the two ends of the main area; Two extension areas formed by the plane structure, the two extension areas are respectively connected to the outer sides of the two transition areas; Two flanges are respectively connected to the outer sides of the two extension areas.

4. A corrugated plate according to claim 3, characterized in that: The two flanges are turned toward the cylindrical outer cylindrical surface corresponding to the cold edge corrugated plate to form a structure for assembly and connection with other parts.

5. A corrugated plate according to claim 3, characterized in that: The area of ​​the main body region is larger than that of the transition region, and the area of ​​the transition region is larger than that of the extension region.

6. A corrugated plate according to claim 3, characterized in that: The two flanges are both plane flanges.

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