Combined connecting structure for concentrated force binding joint and nose cone

Abstract

A combined connecting structure for a concentrated force binding connector and a nose cone is suitable for a connecting combined structure for connecting a rocket nose cone with concentrated force and a short shell to the binding connector, serves as a connecting structure design in a complex stress environment and comprises the binding connector, a connecting assembly, a nose cone inserting end, a base plate fixing angle piece and a base plate assembly. On the basis of the design of the short shell, the assembly operability of the nose cone and the short shell is improved through the special-shaped connection design, the structural form is optimized, and the machining efficiency of inserting the inserting end of the nose cone into the connecting position of the external booster is improved.

Description

Technical Field

[0001] The invention relates to a combined connection structure for a concentrated force binding joint and a nose cone, belonging to the technical field of aerospace vehicle structure design. Background Art

[0002] In order to increase the carrying capacity, current launch vehicles mostly use a combination of core stage rocket + booster rocket. The booster rocket works together with the first stage rocket to push the rocket body into the air. After the rocket is sent to a predetermined height, the booster rocket stops working and separates. The booster rocket and the core stage rocket are connected by a binding joint + connecting rod set at the front (or rear) end of the core stage and the booster. The binding joint bears the functions of fixing, bearing, and transmitting force. The force environment is relatively complex. Therefore, high-strength materials and high-margin solutions are usually used to ensure reliability.

[0003] The location of the binding joint is generally between the booster nose cone and the short shell of the tank. Due to limited space, axial height constraints and other reasons, the structure of the binding joint + nose cone + short shell is complex and difficult to assemble. In the existing scheme, in order to simplify the difficulty of assembly, the plug-in part of the nose cone adopts an avoidance method at the binding joint, and the corresponding notches are processed according to the size and number of the binding joints to ensure the assembly relationship and the theoretical external dimensions of the rocket body structure. This scheme causes multiple discontinuities in the connection between the nose cone and the short shell, affecting the structural load-bearing and force. If the size of the nose cone plug-in end produces a processing error, the amount of assembly finishing will be increased due to the existence of the notch. Summary of the invention

[0004] The technical problem solved by the present invention is: in view of the problem that the connection structure between the booster nose cone and the tank short shell in the current prior art is complex in design and difficult to assemble, a combined connection structure for a concentrated force binding joint and the nose cone is proposed.

[0005] The present invention solves the above technical problems by the following technical solutions:

[0006] A combined connection structure for a concentrated force binding joint and a head cone, comprising a binding joint, a connection assembly, a head cone plug-in end, a pad fixing angle piece, and a pad assembly;

[0007] The head cone plug-in end is tightly arranged on the top of the pad assembly, and the pad assembly is connected to the mounting surface of the short shell body through the pad fixing angle piece. A connecting hole is arranged at the center position of the pad assembly, and the connecting assembly is further fixedly installed on the mounting surface of the short shell body through the connecting hole; the head cone plug-in end is arranged with a mounting hole, and the head cone plug-in end and the pad assembly are both fixed by the connecting assembly; the binding joint is arranged on the other side of the mounting surface of the short shell body, and the short shell body is connected to the external booster through the head cone plug-in end that has been set.

[0008] The head cone plug-in end and the backing plate assembly are arranged on the same side installation surface of the short shell body, and the binding joint and the backing plate assembly are arranged on the opposite side installation surface of the short shell body.

[0009] The pad assembly is machined from a 7050 aluminum alloy thick plate, and the mounting holes and mounting end faces are designed in an equidistant array to accommodate the connection requirements between the nose cone plug-in end and the external booster.

[0010] The connection assembly adopts Ti alloy bolts and Ti alloy nuts. The connection assembly is fixed on the short shell body through the connection hole. The Ti alloy nut is arranged on the top of the pad assembly, and the other side is connected and fixed after the Ti alloy bolt is inserted.

[0011] The pad fixing angle piece is connected between the pad assembly and the short shell body to increase the stiffness continuity and coordination between the short shell body and the pad assembly; the top end of the head cone plug-in end is inserted into the connection position of the external booster, and the bottom end of the head cone plug-in end is limited by the upper end surface of the pad assembly.

[0012] A limiting step is arranged on the outside of the head cone plug-in end to ensure that the head cone plug-in end is inserted into place and to control and limit the insertion depth of the head cone plug-in end.

[0013] After the nose cone plug-in end is inserted into the connection position of the external booster, the combined connection structure is further connected to the external booster through a binding joint, and the connection stiffness between the assembled nose cone plug-in end and the external booster is ensured.

[0014] The size parameters of the pad assembly are adjusted according to the insertion depth of the head cone plug-in end.

[0015] The advantages of the present invention compared with the prior art are:

[0016] (1) The present invention provides a combined connection structure for a concentrated force binding joint and a head cone, and a binding joint pad design scheme that can adapt to the head cone insertion depth. The matching pad parts can be quickly completed by adjusting the number of arrays and the pad size. The parts are machined and integrally formed using a 7050 aluminum alloy thick plate, which has high efficiency and large degree of freedom.

[0017] (2) The present invention adopts an assembly scheme of bundled joint + short shell + nose cone plug-in end / special-shaped pad, which has strong operability and adjustability, high assembly efficiency, and can shorten the work cycle by 1-2 days in the whole process. At the same time, the optimized structural form ensures the stiffness continuity of the nose cone, improves the structural strength and stiffness, and improves the reliability of the arrow body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a binding joint pad that can adapt to the head cone insertion depth provided by the present invention;

[0019] Figure 2This is a schematic diagram of the assembly of the combined connection structure provided by the present invention. DETAILED DESCRIPTION

[0020] A combined connection structure for a concentrated force binding joint and a nose cone, which is suitable for a connection combination structure where a rocket nose cone and a short shell body are connected at a binding joint position under concentrated force. As a connection structure design under a complex force environment, it includes a binding joint, a connection assembly, a nose cone plug-in end, a pad fixing angle piece, and a pad assembly. It takes the short shell body as the design basis, improves the assembly operability of the nose cone and the short shell through a special-shaped connection design, optimizes the structural form, and improves the processing efficiency of inserting the nose cone plug-in end into the external booster connection position.

[0021] In the combined connection structure of the concentrated force binding joint and the head cone, the head cone plug-in end and the pad assembly are both arranged on the mounting surface on the same side of the short shell body, the head cone plug-in end is tightly arranged on the top of the pad assembly, and the size parameters of the pad assembly are adjusted according to the insertion depth of the head cone plug-in end; the pad assembly is connected to the mounting surface of the short shell body through a pad fixing angle piece, a connecting hole is arranged at the center position of the pad assembly, and the connecting assembly is further fixed on the mounting surface of the short shell body through the connecting hole; the head cone plug-in end is arranged with a mounting hole, which is fixed at the same time through the connecting assembly; the binding joint is arranged on the other side of the pad assembly on the mounting surface of the short shell body, and the short shell body is connected to the external booster through the set head cone plug-in end.

[0022] The pad assembly is machined from 7050 aluminum alloy thick plate, and the mounting holes and mounting end faces are designed in an equidistant array to accommodate the connection requirements between the nose cone plug-in end and the external booster.

[0023] The connecting assembly adopts Ti alloy bolts and Ti alloy nuts. The connecting assembly is fixed on the short shell body through the connecting hole. The Ti alloy nut is arranged on the top of the pad assembly, and the other side is connected and fixed after the Ti alloy bolt is inserted.

[0024] The pad fixing angle piece connects the pad assembly and the short shell body to increase the stiffness continuity and coordination between the short shell body and the pad assembly; the top end of the nose cone plug-in end is inserted into the connection position of the external booster, and the bottom end of the nose cone plug-in end is limited by the upper end face of the pad assembly.

[0025] A limiting step is arranged on the outside of the head cone plug-in end to ensure that the head cone plug-in end is inserted into place and to control and limit the insertion depth of the head cone plug-in end.

[0026] After the nose cone plug-in end is inserted into the connection position of the external booster, the combined connection structure is further connected to the external booster through a binding joint, and the connection stiffness between the assembled nose cone plug-in end and the external booster is ensured.

[0027] The head cone plug-in end and the backing plate assembly are arranged on the same side mounting surface of the short shell body, and the binding joint and the backing plate assembly are arranged on the opposite side mounting surface of the short shell body.

[0028] The following is further described in conjunction with the accompanying drawings and preferred embodiments of the specification:

[0029] In the current embodiment, a connection structure of a binding joint 1+short shell 6+head cone plug-in end 3 / special-shaped pad 4 suitable for concentrated force bearing is proposed to ensure the integrity of the head cone plug-in end, improve processing efficiency and assembly operability, and optimize the structural form. The specific design is as follows:

[0030] A binding joint 1 adapted to the depth of the head cone plug-in, a short shell body 6, a head cone plug-in end 3, a pad assembly 5, a pad fixing angle piece 4, and a connecting assembly 2. The binding joint 1 adapted to the length of the head cone plug-in can be designed with a pad that can be adaptively adjusted according to the insertion size of the head cone plug-in end 3. It is machined using 7050 aluminum alloy thick plate, and the mounting holes and mounting end faces can be arranged in an equidistant array to meet different needs.

[0031] The assembly method of the binding joint 1+short shell+head cone plug-in end 3 / special-shaped pad is similar to the "sandwich" structure. Use Ti alloy bolts + nuts to first connect the binding joint 1+short shell+special-shaped pad together, and add a pad fixing angle piece 4 between the pad and the short shell to increase the stiffness continuity and coordination between the short shell and the pad. The top layer of fasteners is not installed, and the head cone plug-in end 3 is inserted into the short shell. The end of the head cone can be limited by the upper end surface of the special-shaped pad and the external step of the head cone to ensure that it is installed in place. Enter the interior through the head cone operation port to install the top layer of fasteners, and complete the assembly connection between the head cone and the short shell, which can ensure the stiffness continuity after the head cone is plugged in.

[0032] The connection structure of the bundled joint + short shell + head cone plug-in end / special-shaped pad suitable for concentrated force bearing proposed in this embodiment can ensure the integrity of the head cone plug-in end, improve processing efficiency and assembly operability, and optimize the structural form.

[0033] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0034] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A combined connection structure for a concentrated force binding joint and a head cone, characterized in that: It includes a binding joint, a connecting assembly, a head cone plug-in end, a pad fixing angle piece, and a pad assembly; The head cone plug-in end is tightly arranged on the top of the pad assembly, and the pad assembly is connected to the mounting surface of the short shell body through the pad fixing angle piece. A connecting hole is arranged at the center position of the pad assembly, and the connecting assembly is further fixedly installed on the mounting surface of the short shell body through the connecting hole; the head cone plug-in end is arranged with a mounting hole, and the head cone plug-in end and the pad assembly are both fixed by the connecting assembly; the binding joint is arranged on the other side of the mounting surface of the short shell body, and the short shell body is connected to the external booster through the head cone plug-in end.

2. A combined connection structure for a concentrated force binding joint and a head cone according to claim 1, characterized in that: The head cone plug-in end and the backing plate assembly are arranged on the same side installation surface of the short shell body, and the binding joint and the backing plate assembly are arranged on the opposite side installation surface of the short shell body.

3. The combined connection structure of the concentrated force binding joint and the head cone according to claim 1, characterized in that: The pad assembly is machined from a 7050 aluminum alloy thick plate, and the mounting holes and mounting end faces are designed in an equidistant array to accommodate the connection requirements between the nose cone plug-in end and the external booster.

4. The combined connection structure of the concentrated force binding joint and the head cone according to claim 1, characterized in that: The connection assembly adopts Ti alloy bolts and Ti alloy nuts. The connection assembly is fixed on the short shell body through the connection hole. The Ti alloy nut is arranged on the top of the pad assembly, and the other side is connected and fixed after the Ti alloy bolt is inserted.

5. The combined connection structure of the concentrated force binding joint and the head cone according to claim 1, characterized in that: The pad fixing angle piece is connected between the pad assembly and the short shell body to increase the stiffness continuity and coordination between the short shell body and the pad assembly; the top end of the head cone plug-in end is inserted into the connection position of the external booster, and the bottom end of the head cone plug-in end is limited by the upper end surface of the pad assembly.

6. The combined connection structure of the concentrated force binding joint and the head cone according to claim 5, characterized in that: A limiting step is arranged on the outside of the head cone plug-in end to ensure that the head cone plug-in end is inserted into place and to control and limit the insertion depth of the head cone plug-in end.

7. The combined connection structure of the concentrated force binding joint and the head cone according to claim 5, characterized in that: After the nose cone plug-in end is inserted into the connection position of the external booster, the combined connection structure is further connected to the external booster through a binding joint, and the connection stiffness between the assembled nose cone plug-in end and the external booster is ensured.

8. The combined connection structure of the concentrated force binding joint and the head cone according to claim 4, characterized in that: The size parameters of the pad assembly are adjusted according to the insertion depth of the head cone plug-in end.

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