A sealed corner box for beam-frame connection with a watertight interface

Abstract

The present application provides a beam-frame connection sealing corner box with a watertight interface, which belongs to the technical field of aircraft fuselage design. The beam-frame connection sealing corner box comprises a frame front bottom edge 1, a frame front beam web edge 2, a frame front skin edge 3, a frame web sealing edge 4, a frame edge strip sealing edge 5, a beam web sealing edge 6, a frame rear bottom edge 7, a frame rear beam web edge 8 and a frame rear skin edge 9. The corner box is inserted from one side of the frame through an opening of the frame web to connect the front and rear beams, and sealing edges are added at the frame web and the frame edge strip to make force transmission direct and achieve watertightness at the same time.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft fuselage design, and in particular relates to a beam-frame connection sealing corner box with a watertight interface. Background Art

[0002] Some aircraft fuselages have watertight requirements and are arranged with multiple watertight frames. The longitudinal beams are disconnected at the watertight frames. The longitudinal beams are the main load-bearing components of the aircraft and mainly bear the axial load caused by the bending of the fuselage. The connection of the longitudinal beams at the watertight frames is usually through the connection of the pull angle box, which is not direct enough in transmitting force. Summary of the invention

[0003] In order to solve the problem that the connection of the longitudinal beam at the watertight frame in the related art is not directly enough to transmit force through the connection of the tension angle box, the present invention provides a beam frame connection sealing angle box through the watertight interface, and the technical solution is as follows:

[0004] A beam-frame connection sealing corner box with a watertight interface, wherein the beam-frame connection sealing corner box is divided into a frame front part, a frame rear part and a frame web sealing edge 4. The frame front part includes: a frame front bottom edge 1, a frame front beam web edge 2, a frame front skin edge 3, a frame edge strip sealing edge 5, and a beam web sealing edge 6. The frame front beam web edge 2 and the frame front skin edge 3 are located on both sides of the frame front bottom edge 1. The frame edge strip sealing edge 5 is located on the frame front skin edge 3. The beam web sealing edge 6 is located on the frame front beam web edge 2. The frame rear part includes: a frame rear bottom edge 7, a frame rear beam web edge 8 and a frame rear skin edge 9. The frame rear beam web edge 8 and the frame rear skin edge 9 are located on both sides of the frame rear bottom edge 7. The frame web sealing edge 4 is located between the frame front part and the frame rear part, and is the interface between the frame front part and the frame rear part. After installation, the frame web sealing edge 4 is located at the frame plane, and the beam-frame connection sealing corner box passes through the opening on the frame 10 from front to back and is positioned. The beam-frame connection sealing corner box is used to connect the watertight interface frame and the beam and achieve sealing.

[0005] There is a gap between the front bottom edge 1 of the frame and the front beam edge strip 13 , or between the rear bottom edge 7 of the frame and the rear beam edge strip 14 .

[0006] The front bottom edge 1 of the frame is connected to the front beam edge strip 13, the frame 10, the strip plate 15 and the skin 16 by fasteners.

[0007] The frame rear bottom edge 7 is connected to the rear beam edge strip 14, the frame 10, the belt plate 15, and the skin 16 by fasteners.

[0008] The frame front beam web edge 2 is connected to the front beam edge strip 13 and the front beam web 11 by fasteners.

[0009] The frame rear beam web edge 8 is connected to the rear beam edge strip 14 and the rear beam web 12 by fasteners.

[0010] The front skin edge 3 of the frame is connected to the front beam edge strip 13, the frame 10, the strip plate 15 and the skin 16 by fasteners.

[0011] The frame rear skin edge 9 is connected to the rear beam edge strip 14, the frame 10, the belt plate 15, and the skin 16 by fasteners.

[0012] The frame web sealing edge 4 is connected to the frame 10 via fasteners.

[0013] The frame edge strip sealing edge 5 is connected to the frame 10, the strip plate 15 and the skin 16 by fasteners.

[0014] The beam web sealing edge 6 is connected to the frame 10 and the front beam web 11 by fasteners.

[0015] Wherein, a corrosion protection layer is provided on the surface of the beam-frame connection sealing corner box.

[0016] The fasteners may be bolts, and the specifications and number of the bolts are determined by the component strength verification results.

[0017] The present invention provides a sealed corner box for connecting beams and frames with a watertight interface. The corner box is inserted from one side of the frame through an opening of a frame web to connect the front and rear beams. At the same time, sealing edges are added at the frame web and frame edge strips to make force transmission direct and achieve watertightness at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a structure of a beam-frame connection sealing corner box with a watertight interface provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the connection between the corner box component and the surrounding structure provided in an embodiment of the present application;

[0020] Figure 3 Schematic diagram of the connection between the remaining components of the corner box and the surrounding structure provided in the embodiment of the present application.

[0021] Description of reference numerals:

[0022] 1-frame front bottom edge, 2-frame front beam web edge, 3-frame front skin edge, 4-frame web sealing edge, 5-frame edge strip sealing edge, 6-beam web sealing edge, 7-frame rear bottom edge, 8-frame rear beam web edge, 9-frame rear skin edge, 10-frame, 11-front beam web, 12-rear beam web, 13-front beam edge strip, 14-rear beam edge strip, 15-strip plate, 16-skin, 17-bolts. DETAILED DESCRIPTION

[0023] The present application is further described in detail below through specific implementation methods and drawings.

[0024] The present invention provides a beam-frame connection sealing corner box with a watertight interface, see Figure 1 The beam-frame connection sealing corner box is divided into a frame front part, a frame rear part and a frame web sealing edge 4. The frame front part includes: a frame front bottom edge 1, a frame front beam web edge 2, a frame front skin edge 3, a frame edge strip sealing edge 5, and a beam web sealing edge 6. The frame front beam web edge 2 and the frame front skin edge 3 are located on both sides of the frame front bottom edge 1. The frame edge strip sealing edge 5 is located on the frame front skin edge 3. The beam web sealing edge 6 is located on the frame front beam web edge 2. The frame rear part includes: a frame rear bottom edge 7, a frame rear beam web edge 8 and a frame rear skin edge 9. The frame rear beam web edge 8 and the frame rear skin edge 9 are located on both sides of the frame rear bottom edge 7. The frame web sealing edge 4 is located between the frame front part and the frame rear part, and is the interface between the frame front part and the frame rear part. After installation, the frame web sealing edge 4 is located at the frame plane.

[0025] The beam-frame connection sealing corner box is used to connect the watertight interface frame and the beam and achieve sealing.

[0026] The dimensions of the various components of the above-mentioned corner box structure can be determined based on the dimensions of the surrounding structures and the results of strength verification.

[0027] like Figure 2 As shown, the beam-frame connection sealed corner box passes through the opening on the frame 10 from front to back and is positioned.

[0028] A gap is left between the front bottom edge 1 of the frame and the front beam edge strip 13, or between the rear bottom edge 7 of the frame and the rear beam edge strip 14, as a process compensation.

[0029] The front bottom edge 1 of the beam-frame connection sealed corner box is connected to the front beam edge strip 13, frame 10, strip plate 15, and skin 16 by bolts. The specifications and number of bolts are determined by the component strength check results. The width of the front bottom edge 1 of the frame depends on the width of the beam edge strip, and the length and thickness are determined according to the strength check results.

[0030] The front beam web edge 2 of the beam-frame connection sealing corner box is connected to the front beam edge strip 13 and the front beam web 11 by two rows of bolts, and the specifications and number of the bolts are determined by the strength check results. The width of the front beam web edge 2 depends on the bolt specifications, and the length and thickness are determined according to the strength check results.

[0031] The front skin edge 3 of the beam-frame connection sealing corner box is connected to the front beam edge strip 13, frame 10, strip plate 15, and skin 16 by two rows of bolts. The specifications and number of the bolts are determined by the strength check results. The width of the front skin edge 3 of the frame depends on the bolt specifications, and the length and thickness are determined according to the strength check results.

[0032] The frame web sealing edge 4 of the beam-frame connection sealing corner box is connected to the frame 10 by two rows of bolts. The specifications and number of the bolts are determined by the sealing requirements and the strength check results. The width of the frame web sealing edge 4 depends on the bolt specifications and the size of the frame opening, and the thickness is determined according to the strength check results.

[0033] The frame edge strip sealing edge 5 of the beam-frame connection sealing corner box is connected to the frame 10, the strip plate 15, and the skin 16 by two rows of bolts. The specifications and number of the bolts are determined by the sealing requirements and the strength check results. The width of the frame edge strip sealing edge 5 depends on the width of the frame edge strip, the length depends on the bolt specifications, and the thickness is determined according to the strength check results.

[0034] The beam web sealing edge 6 of the beam-frame connection sealing corner box is connected to the frame 10 and the front beam web 11 by two rows of bolts. The specifications and number of the bolts are determined by the sealing requirements and the strength check results. The width of the beam web sealing edge 6 depends on the width of the frame reinforcement, the length depends on the bolt specifications, and the thickness is determined according to the strength check results.

[0035] like Figure 3 As shown, the frame rear bottom edge 7 of the beam frame connection sealing corner box is connected with the rear beam edge strip 14, frame 10, strip plate 15, and skin 16 by bolts, and the specifications and number of the bolts are determined by the strength check results. The width of the frame rear bottom edge 7 depends on the width of the beam edge strip, and the length and thickness are determined according to the strength check results.

[0036] The frame rear beam web edge 8 of the beam frame connection sealing corner box is connected with the rear beam edge strip 14 and the rear beam web 12 by two rows of bolts, and the specifications and number of the bolts are determined by the strength check results. The width of the frame rear beam web edge 8 depends on the bolt specifications, and the length and thickness are determined according to the strength check results.

[0037] The frame rear skin edge 9 of the beam-frame connection sealed corner box is connected with the rear beam edge strip 14, frame 10, strip plate 15, and skin 16 by two rows of bolts. The specifications and number of the bolts are determined by the strength check results. The width of the frame rear skin edge 9 depends on the bolt specifications, and the length and thickness are determined according to the strength check results.

[0038] The connection sealing corner box can be integrally machined from a 7050 aluminum alloy thick plate.

[0039] In the present invention, it is further possible to Figure 1 The connection sealing corner box shown is subjected to surface protection treatment: chromium acid anodizing and two layers of primer spraying are performed. If there are parts that cannot be sprayed with topcoat after assembly due to space problems, these parts can be sprayed with topcoat while in the component state.

[0040] See also Figure 2 and Figure 3 When connecting and sealing the corner box, the contact surfaces where the sides of the corner box are connected to the frame beam are sealed, and the edge sealing is performed on the edge of the corner box.

[0041] See also Figure 2 and Figure 3 , the connecting bolts are wet assembled and sealed.

[0042] In the present invention, during installation, the corner box is inserted from one side of the frame according to the position of the sealing edge of the frame belly plate, and a process compensation is set on one side of the corner box. Compared with the traditional corner box, the present invention achieves sealing while meeting the force transmission requirements, reduces the number of parts, and simplifies the assembly process.

[0043] The above only expresses the implementation methods of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A beam-frame connection sealing corner box with a watertight interface, characterized in that: The beam-frame connection sealing corner box is divided into a frame front part, a frame rear part and a frame web sealing edge (4), wherein the frame front part comprises: a frame front bottom edge (1), a frame front beam web edge (2), a frame front skin edge (3), a frame edge strip sealing edge (5), and a beam web sealing edge (6), wherein the frame front beam web edge (2) and the frame front skin edge (3) are located on both sides of the frame front bottom edge (1), the frame edge strip sealing edge (5) is located on the frame front skin edge (3), and the beam web sealing edge (6) is located on the frame front beam web edge (2). The frame rear part comprises: a frame rear bottom edge (7), a frame rear beam web edge (8) and a frame rear skin edge (9); the frame rear beam web edge (8) and the frame rear skin edge (9) are located on both sides of the frame rear bottom edge (7); the frame web sealing edge (4) is located between the frame front part and the frame rear part, and is the interface between the frame front part and the frame rear part; the beam-frame connection sealing corner box passes through the opening on the frame (10) from front to rear and is positioned; the beam-frame connection sealing corner box is used for connecting the watertight interface frame and the beam and achieving sealing.

2. The beam-frame connection sealed corner box according to claim 1, characterized in that: A gap is left between the front bottom edge (1) of the frame and the front beam edge strip (13), or between the rear bottom edge (7) of the frame and the rear beam edge strip (14).

3. The beam-frame connection sealed corner box according to claim 1, characterized in that: The front bottom edge (1) of the frame is connected to the front beam edge strip (13), the frame (10), the belt plate (15) and the skin (16) by fasteners. The rear bottom edge (7) of the frame is connected with the rear beam edge strip (14), the frame (10), the belt plate (15) and the skin (16) through fasteners.

4. The beam-frame connection sealed corner box according to claim 1, characterized in that: The frame front beam web edge (2) is connected to the front beam edge strip (13) and the front beam web (11) by fasteners. The frame rear beam web edge (8) is connected to the rear beam edge strip (14) and the rear beam web (12) via fasteners.

5. The beam-frame connection sealed corner box according to claim 1, characterized in that: The front skin edge (3) of the frame is connected to the front beam edge strip (13), the frame (10), the belt plate (15) and the skin (16) by fasteners. The frame rear skin edge (9) is connected to the rear beam edge strip (14), the frame (10), the belt plate (15) and the skin (16) through fasteners.

6. The beam-frame connection sealed corner box according to claim 1, characterized in that: The frame web sealing edge (4) is connected to the frame (10) via fasteners.

7. The beam-frame connection sealed corner box according to claim 1, characterized in that: The frame edge strip sealing edge (5) is connected to the frame (10), the strip plate (15) and the skin (16) through fasteners.

8. The beam-frame connection sealed corner box according to claim 1, characterized in that: The beam web sealing edge (6) is connected to the frame (10) and the front beam web (11) via fasteners.

9. The beam-frame connection sealed corner box according to claim 1, characterized in that: The surface of the beam-frame connection sealing corner box is treated by chromic acid anodizing and spray painting.

10. The beam-frame connection sealed corner box according to claim 3, 4, 5, 6, 7 or 8, characterized in that: The fasteners are bolts, and the specifications and number of the bolts are determined by the component strength verification results.

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