Fiber-based reflector supporting structure

Abstract

The invention relates to a fiber-based reflector supporting structure, and belongs to the technical field of space optical machine structure supporting. Comprising a reflector and a plurality of groups of fiber-based reflector supporting structure assemblies, a plurality of fiber yarn bonding grooves are evenly distributed in the side wall of the reflector in the circumferential direction, and the fiber-based reflector supporting structure assemblies are in one-to-one correspondence with the fiber yarn bonding grooves. Each group of fiber-based reflector supporting structure assembly comprises a carbon fiber yarn, a mounting seat and a connecting bolt, a through hole is formed in the center of the mounting seat, an end bonding groove is formed in the end part of the mounting seat, the carbon fiber yarn is arranged on the mounting seat, and the end part of the carbon fiber yarn is bonded with the end bonding groove of the mounting seat through a structural adhesive; the carbon fiber yarn located at the central through hole of the mounting seat is bonded with the fiber yarn bonding groove through a structural adhesive; the mounting base is connected with the remote sensing camera body through a connecting bolt. According to the invention, the weight of the reflector assembly is significantly reduced, and the stability of the reflector assembly is significantly improved through the super-soft characteristic of the carbon fibers.

Description

Technical Field

[0001] The invention belongs to the technical field of space optical-mechanical structure support, and relates to a fiber-based reflector support structure. Background Art

[0002] At present, the reflector support form of general space optical remote sensing cameras is to use flexible metal structures directly bonded to the reflector. By processing special forms of wire cutting grooves on the metal structures, the flexibility of the supporting structures is improved, thereby reducing the impact of assembly stress and temperature fluctuation stress on the reflector.

[0003] In order to ensure the fundamental frequency of the reflector and protect it from vibration and shock during rocket launch, the traditional flexible metal structural support solution for the reflector is generally designed to have a large support structure design weight. In addition, it is difficult to ensure the position stability of the reflector after experiencing launch vibration and shock. Summary of the invention

[0004] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide a fiber-based reflector support structure.

[0005] The solution of the present invention is:

[0006] A fiber-based reflector support structure comprises a reflector and a plurality of groups of fiber-based reflector support structure components;

[0007] A plurality of fiber filament bonding grooves are evenly distributed in the circumferential direction of the side wall of the reflector, and the fiber-based reflector support structure components correspond to the fiber filament bonding grooves one by one;

[0008] Each set of fiber-based reflector support structure components includes carbon fiber filaments, a mounting seat and connecting bolts. The mounting seat is processed with a through hole in the center and an end bonding groove at the end. The carbon fiber filaments are placed on the mounting seat, and the ends of the carbon fiber filaments are bonded to the end bonding grooves of the mounting seat through structural adhesive; the carbon fiber filaments located at the through hole in the center of the mounting seat are bonded to the fiber filament bonding grooves through structural adhesive; the mounting seat is connected to the remote sensing camera body through connecting bolts.

[0009] Preferably, a plurality of protrusions are evenly distributed circumferentially on the side wall of the reflector, fiber filament bonding grooves are processed on the protrusions, the central through hole of the mounting seat is matched and mounted on the protrusions on the side wall of the reflector, and the carbon fiber filaments located at the central through hole are bonded to the fiber filament bonding grooves on the protrusions by structural adhesive.

[0010] Preferably, the carbon fiber filaments are in a cantilever shape except for the ends and the places where they are bonded to the fiber filament bonding grooves.

[0011] Preferably, the reflector adopts a lightweight design, and the lightweight ratio exceeds 90%.

[0012] Preferably, the mounting seat is a thin-walled structure with a wall thickness not exceeding 2 mm.

[0013] Preferably, the overall support stiffness of the reflector assembly can be adjusted by adjusting the diameter of the carbon fiber filaments and the thickness of the structural adhesive.

[0014] Preferably, the mounting seat material is titanium alloy.

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

[0016] Aiming at small-aperture reflectors, the present invention proposes a fiber-based reflector support solution that utilizes carbon fiber filaments to connect a metal support structure with the reflector, thereby significantly reducing the weight of the reflector assembly. At the same time, the ultra-flexible characteristics of the carbon fiber filaments significantly improve the stability of the reflector assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly of a fiber-based reflector support structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the reflector in the present invention;

[0019] Figure 3 is a detailed schematic diagram of the fiber-based reflector support structure assembly of the present invention;

[0020] Figure 4 Detailed connection diagram of the fiber-based reflector support structure assembly of the present invention

[0021] In the figure: 1-reflector, 2-fiber-based reflector support structure assembly, 3-fiber filament, 4-mounting seat, 5-connecting bolt. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] The present invention utilizes carbon fiber bundles to directly connect the reflector to the main support structure, thereby forming a highly lightweight and highly stable reflector assembly support structure.

[0024] The specific ideas are as follows:

[0025] a. For the reflector blank, a fiber bundle glue groove is processed on the reflector structure body, and structural characteristics such as cantilever and thin wall are used to realize a reflector structure with a fiber bundle glue groove that can realize mechanical and thermal stress unloading.

[0026] b. For the reflector support structure, a thin-walled structural shell with fiber bundle glue grooves is adopted to greatly reduce the weight of the support while ensuring the support stiffness.

[0027] c. Use optical structural adhesive to bond the carbon fiber bundle to the reflector blank and the reflector support structure respectively to achieve high-stability support for the reflector.

[0028] like Figure 1 As shown, a fiber-based reflector support structure of the present invention includes a reflector 1 and a plurality of groups of fiber-based reflector support structure components 2.

[0029] like Figure 2 As shown, multiple fiber bonding grooves are evenly distributed on the side wall of the reflector 1. The reflector 1 needs to be highly lightweight, and generally the lightweight ratio of the reflector needs to exceed 90% to ensure the overall support stiffness of the reflector assembly.

[0030] like Figure 3 As shown, the fiber-based reflector support structure assembly 2 is composed of carbon fiber filaments 3, a mounting seat 4 and a connecting bolt 5. The mounting seat 4 is connected to the remote sensing camera body through the connecting bolt 5. The specific design form of the mounting seat 4 is related to the relative position of the reflector and the remote sensing camera body. In general, the mounting seat 4 is designed as a thin-walled structure (wall thickness does not exceed 2mm) to ensure a high lightweight rate of the entire reflector assembly. A through hole is processed in the center of the mounting seat 4.

[0031] like Figure 4 As shown, the detailed internal connection relationship between the fiber-based reflector support structure assembly 2 and the reflector 1 is given. Specifically, the carbon fiber filaments 3 at the central through hole are bonded to the reflector 1 at its fiber filament bonding grooves through structural glue, and the carbon fiber filaments 3 are bonded to the four fiber filament bonding grooves at the end of the mounting seat 4 through structural glue, and then the mounting seat 4 is connected to the camera body through the connecting bolts 5 to complete the support and fixation of the reflector. The overall support stiffness of the reflector assembly can be adjusted by adjusting the diameter of the carbon fiber filaments 3 and the thickness of the structural glue. Since the mass of the carbon fiber filaments 3 and the structural glue accounts for a very small proportion, the overall weight of the reflector assembly is generally not affected during the adjustment process.

[0032] The mount material is titanium alloy.

[0033] Example:

[0034] The present embodiment provides a fiber-based reflector support structure, comprising a reflector 1 and three groups of fiber-based reflector support structure components 2 .

[0035] like Figure 2 As shown, three protrusions are evenly distributed on the side wall of the reflector 1, and fiber filament bonding grooves are processed on the protrusions. The reflector 1 needs to be highly lightweight, and generally the lightweight rate of the reflector needs to exceed 90% to ensure the overall support stiffness of the reflector assembly.

[0036] like Figure 3As shown, the fiber-based reflector support structure assembly 2 is composed of carbon fiber filaments 3, a mounting seat 4 and a connecting bolt 5. The mounting seat 4 is connected to the remote sensing camera body through the connecting bolt 5. The specific design form of the mounting seat 4 is related to the relative position of the reflector and the remote sensing camera body. This embodiment is a cross structure with a through hole in the center and a connecting rod designed at the bottom. Generally, the mounting seat 4 is designed as a thin-walled structure to ensure a high lightweight rate of the entire reflector assembly.

[0037] like Figure 4 As shown, the detailed internal connection relationship between the fiber-based reflector support structure assembly 2 and the reflector 1 is given. Specifically, the mounting seat 4 is mounted on the corresponding boss through its central through hole, the carbon fiber filaments 3 are bonded to the reflector 1 at its fiber filament bonding grooves through structural glue, and the carbon fiber filaments 3 are bonded to the four fiber filament bonding grooves at the end of the mounting seat 4 through structural glue, and then the mounting seat 4 is connected to the camera body through the connecting bolts 5 to complete the support and fixation of the reflector. The overall support stiffness of the reflector assembly can be adjusted by adjusting the diameter of the carbon fiber filaments 3 and the thickness of the structural glue. Since the mass of the carbon fiber filaments 3 and the structural glue accounts for a very small proportion, the overall weight of the reflector assembly is generally not affected during the adjustment process.

[0038] Aiming at small-aperture reflectors, the present invention proposes a fiber-based reflector support solution that utilizes carbon fiber filaments to connect a metal support structure with the reflector, thereby significantly reducing the weight of the reflector assembly. At the same time, the ultra-flexible characteristics of the carbon fiber filaments significantly improve the stability of the reflector assembly.

[0039] 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 fiber-based reflector support structure, characterized in that: It comprises a reflector (1) and a plurality of groups of fiber-based reflector support structure components (2); A plurality of fiber filament bonding grooves are evenly distributed in the circumferential direction of the side wall of the reflector (1), and the fiber-based reflector support structure components (2) correspond to the fiber filament bonding grooves one by one; Each group of fiber-based reflector support structure components (2) comprises carbon fiber filaments (3), a mounting seat (4) and connecting bolts (5); a through hole is processed at the center of the mounting seat (4) and an end bonding groove is processed at the end; the carbon fiber filaments (3) are placed on the mounting seat, and the ends of the carbon fiber filaments (3) are bonded to the end bonding grooves of the mounting seat (4) through structural adhesive; the carbon fiber filaments located at the central through hole of the mounting seat (4) are bonded to the fiber filament bonding grooves through structural adhesive; and the mounting seat (4) is connected to the remote sensing camera body through the connecting bolts (5).

2. A fiber-based reflector support structure according to claim 1, characterized in that: A plurality of protrusions are evenly distributed around the side wall of the reflector, and fiber filament bonding grooves are processed on the protrusions. The central through hole of the mounting seat (4) is matched and mounted on the protrusions on the side wall of the reflector (1), and the carbon fiber filaments (3) located at the central through hole are bonded to the fiber filament bonding grooves on the protrusions through structural adhesive.

3. A fiber-based reflector support structure according to claim 1, characterized in that: Except for the end portion and the bonding position with the fiber bonding groove, the rest of the carbon fiber filament is cantilevered.

4. The fiber-based reflector support structure according to claim 1, characterized in that: The reflector adopts a lightweight design, with a lightweight rate of over 90%.

5. The fiber-based reflector support structure according to claim 1, characterized in that: The mounting base is a thin-walled structure with a wall thickness not exceeding 2 mm.

6. A fiber-based reflector support structure according to claim 1, characterized in that: By adjusting the diameter of the carbon fiber filaments and the thickness of the structural adhesive, the overall support stiffness of the reflector assembly can be adjusted.

7. The fiber-based reflector support structure according to claim 1, characterized in that: The mounting seat material is titanium alloy.

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