Side supporting structure of large-aperture foundation reflector

Abstract

The invention, which relates to the technical field of optical component supporting, discloses a large-aperture foundation reflector side edge supporting structure comprising a reflector body and a triangular substrate, and the reflector body is supported above the triangular substrate through three supporting parts uniformly distributed on the outer circumference of the reflector body; the mirror body and the supporting part are bonded through a bonding block, and the bonding block can be connected with a bonding tool to achieve position adjustment and bonding operation. According to the side edge supporting structure of the large-diameter foundation reflector, the connecting form is simplified, the complexity of the overall structure is reduced, and the development cost and the time cost are saved; when the reflector assembly is assembled, a dual bonding link is adopted, the assembly process flow is simplified, and the assembly efficiency is improved; and through the flexible link design of the double-foot frame, the gravity action is effectively unloaded, the influence of assembly stress and thermal stress is eliminated, and the surface shape precision of the reflecting mirror is ensured to fully meet the use requirements of foundation photoelectric equipment in various working states.

Description

Technical Field

[0001] The invention relates to the technical field of optical component support, and in particular to a side support structure of a large-aperture ground-based reflector. Background Art

[0002] Large-aperture optical reflectors are the core part of ground-based optical equipment, and their surface shape accuracy determines the imaging quality of the entire optical system. The use environment of ground-based optical equipment is relatively complex. It not only needs to meet the use requirements under gravity working conditions, but also needs to adapt to large temperature changes in the working environment. The back three-point support structure is a commonly used support form for large-aperture reflector assemblies. It can realize the static constraint of the reflector and has the advantages of simple structure, good processability, strong structural stability, and high reliability of ground installation and adjustment detection. Compared with the back three-point support, the side three-point support avoids the problems of long processing cycle and complex structure caused by the mechanical interface processing of the mirror body, and also avoids the problems of reduced mirror body stiffness caused by the processing of mechanical interfaces. The use of side three-point support can reduce the number of mechanical parts and reduce the complexity of the reflector assembly, while still meeting the design indicators of the reflector under various working conditions. At present, the side three-point support mostly adopts the Bipod support structure, which combines the kinematic installation of optical components with flexible installation, which can effectively eliminate the influence of mechanical stress and thermal stress while fully unloading the gravity of the mirror body itself.

[0003] The patent with publication number CN 115016095 B discloses a large-aperture space reflector with a novel Bipod flexible support structure. The side wall of the reflector body has three rectangular sections, and the rectangular sections are installed with rectangular bosses. The space reflector also includes a Bipod flexible support assembly connected to the rectangular bosses, and a reflector support plate connected to the Bipod flexible support assembly. The shortcomings of the prior art are: first, there is a stress concentration problem: the boss is designed to be rectangular, which may cause stress concentration and reduce the safety factor of the reflector assembly; second, the axial stiffness is poor: the Bipod flexible support assembly adopts a biaxial flexible link, and the middle section of the flexible structure is thin, which makes the axial stiffness poor and there is a risk of introducing large displacement and angular errors; third, the bonding process is poor: since the rectangular boss needs to be tightly bonded to the reflector body, when the distributed circular glue injection groove is used for glue injection bonding, the sealing and pressing process of this structure is difficult to implement, and it is easy to cause problems such as glue overflow and glue leakage during bonding, resulting in uneven distribution of bonding stress, thereby affecting the surface accuracy of the reflector; fourth, the connection reliability is poor and the assembly stress is large: since the rectangular boss and the Bipod flexible support assembly are connected by left, right and upper three-side screws, due to the thickness limit of the rectangular boss, only screws with a smaller nominal diameter can be used, and the connection reliability is poor; the three-side screw connection has high requirements on the processing accuracy of the rectangular connection frame of the rectangular boss and the Bipod flexible support assembly, and the tightening torque of the screws will introduce a large assembly stress, thereby affecting the surface accuracy of the reflector.

[0004] Based on the above technical problems, technicians in this field urgently need to develop a large-aperture ground-based reflector side support structure that can reduce the structural complexity, simplify the assembly process, and at the same time unload gravity, eliminate the influence of assembly stress and thermal stress, and maintain the surface accuracy of the reflector in the working state. Summary of the invention

[0005] The purpose of the present invention is to provide a side support structure for a large-aperture ground-based reflector, which reduces the complexity of the structure, simplifies the assembly process, and at the same time plays a role in unloading gravity, eliminating the influence of assembly stress and thermal stress, and maintaining the surface accuracy of the reflector in a working state.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A large-aperture ground-based reflector side support structure of the present invention comprises:

[0008] The mirror body; and

[0009] A triangular base plate, wherein the mirror body is supported on the top of the triangular base plate by three supporting parts evenly distributed on the outer circumference of the mirror body;

[0010] The mirror body and the support part are bonded together by a bonding block, and the bonding block can be connected to a bonding tool to achieve position adjustment and bonding operations.

[0011] Furthermore, the support part is a bipedal frame, and the bipedal frame includes a support plate body, and the support plate body is provided with a plurality of threaded holes for connecting the triangular base plate;

[0012] Two legs are fixed obliquely on the support plate body, and longitudinal flexible links and transverse flexible links are orthogonally distributed on the two legs to form a local groove structure;

[0013] A support block is formed at the intersection of the extension lines of the two legs, and a bipod bonding surface is provided on the support block for bonding the bonding block.

[0014] Furthermore, two sides of the bonding block are respectively configured as a rear bonding surface and a front bonding surface, wherein the rear bonding surface is bonded to the side surface of the mirror body, and the front bonding surface is bonded to the support portion;

[0015] A cylindrical boss is provided at the center of the front bonding surface, and a bonding block threaded hole is opened on the cylindrical boss. The bonding tool is connected through the bonding block threaded hole to achieve position adjustment and bonding operations.

[0016] Furthermore, a mounting boss is provided on the mounting surface of the triangular base plate, and a countersunk hole is provided on the mounting boss so that the triangular base plate can be connected to the supporting part by screws.

[0017] Preferably, the mirror body is made of microcrystalline glass or fused quartz material.

[0018] Preferably, the bonding block is supported by indium steel material.

[0019] Preferably, the bipod is made of titanium alloy material, and the support block is located on the neutral plane of the reflector.

[0020] In the above technical solution, the large-aperture ground-based reflector side support structure provided by the present invention has the following beneficial effects:

[0021] A large-aperture ground-based reflector side support structure of the present invention simplifies the connection form and reduces the complexity of the overall structure, thereby saving research and development costs and time costs; when assembling the reflector assembly, a double bonding link is adopted to simplify the assembly process and improve assembly efficiency; through the flexible link design of the double-legged frame, the gravity effect is effectively unloaded, the influence of assembly stress and thermal stress is eliminated, and it is ensured that the surface accuracy of the reflector fully meets the use requirements of ground-based optoelectronic equipment in all working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 An axonometric diagram of a side support structure of a large-aperture ground-based reflector provided in an embodiment of the present invention;

[0024] Figure 2 A front view of a side support structure of a large-aperture ground-based reflector provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a bonding block in a side support structure of a large-aperture ground-based reflector provided by an embodiment of the present invention;

[0026] Figure 4 A reverse schematic diagram of a bonding block in a side support structure of a large-aperture ground-based reflector provided by an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of a bipod in a side support structure of a large-aperture ground-based reflector provided by an embodiment of the present invention;

[0028] Figure 6 A top view of a triangular base plate in a side support structure of a large-aperture ground-based reflector provided in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 10. mirror body; 20. bonding block; 30. bipod; 40. triangular base plate;

[0031] 21. rear bonding surface; 22. bonding block threaded hole; 23. front bonding surface;

[0032] 31. longitudinal flexible link; 32. transverse flexible link; 33. bipedal frame bonding surface; 34. threaded hole;

[0033] 41. Countersunk hole. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1 to Figure 6 As shown;

[0036] A large-aperture ground-based reflector side support structure of the present invention comprises:

[0037] Mirror body 10; and

[0038] A triangular base plate 40, the mirror body 10 is supported on the triangular base plate 40 by three supporting parts evenly distributed on the outer circumference thereof;

[0039] The mirror body 10 and the support portion are bonded together by a bonding block 20 , and the bonding block 20 can be connected to a bonding tool to achieve position adjustment and bonding operations.

[0040] As a further introduction to this embodiment, the support portion is a bipedal frame 30, and the bipedal frame 30 includes a support plate body, and the support plate body is provided with a plurality of threaded holes 34 for connecting the triangular base plate 40;

[0041] The two legs are fixed obliquely on the support plate body, and a longitudinal flexible link 31 and a transverse flexible link 32 are provided on the two legs. The longitudinal flexible link 31 and the transverse flexible link 32 are orthogonal to each other. The flexible structure is formed by local grooving. The groove edge adopts a rounded structure to avoid stress concentration. The intersection of the extension lines of the two flexible legs of each bipod is located on the neutral plane of the reflector.

[0042] A support block is formed at the intersection of the two extension lines of the legs, and a bipod bonding surface 33 is provided on the support block for bonding the bonding block 20. The bonding blocks 20 are evenly distributed along the side wall of the mirror body 10 in a 120° circle, and each bonding block 20 corresponds to a bipod 30. The bonding block 20 is bonded to the side wall of the mirror body 10 by adhesive, and the axial bonding heights of the three bonding blocks 20 are the same. The bonding block 20 is connected to the bipod 30 by bonding, and the bipod 30 is fixed to the triangular base plate 40 by screws, thereby realizing the three-point support of the side of the reflector.

[0043] As a further introduction to this embodiment, the two sides of the bonding block 20 are respectively configured as a rear bonding surface 21 and a front bonding surface 23, wherein the rear bonding surface 21 is bonded to the side of the mirror body 10, and the front bonding surface 23 is bonded to the bipod bonding surface 33, and the relative position of the bonding block 20 and the bipod 30 is controlled to ensure that the thickness of the adhesive layer meets the design requirements;

[0044] A cylindrical boss is provided at the center of the front bonding surface 23, and a bonding block threaded hole 22 is provided on the cylindrical boss. The bonding block threaded hole 22 is connected to the bonding tool to achieve position adjustment and bonding operations. The geometric center of the bonding block 20 is located on the neutral plane of the reflector. The bonding block threaded hole 22 is connected to a special bonding tool to control the distance between the bonding block 20 and the mirror body 10, thereby controlling the thickness of the adhesive layer.

[0045] As a further introduction to this embodiment, a mounting boss is provided on the mounting surface of the triangular base plate 40 , and a countersunk hole 41 is opened on the mounting boss so that the triangular base plate 40 can be connected to the support portion by screws.

[0046] As a preferred technical solution of this embodiment, the mirror body 10 is made of microcrystalline glass, fused quartz or other optical materials, and the side does not need to be processed for external interface.

[0047] As a preferred technical solution of this embodiment, the bonding block 20 is supported by indium steel material, and its thermal expansion coefficient is similar to that of the mirror body 10.

[0048] As a preferred technical solution of this embodiment, the bipod 30 is made of titanium alloy material, and the support block is located on the neutral plane of the reflector.

[0049] The side support structure of the large-diameter ground-based reflector in the present invention requires a special bonding tool during the assembly process. The bonding tool plays a role in reference transmission, which can adjust and fix the relative position between the mirror body and the mechanical parts, ensure the accuracy of the relative position of each part during the bonding process, and maintain stability during the curing process to ensure the bonding quality.

[0050] The specific bonding and assembly process of the large-aperture ground-based reflector side support structure of the present invention is as follows:

[0051] First, the assembly work of the bonding tool and the parts to be bonded is completed, specifically including: connecting the triangular substrate 40 with the bonding tool, installing the mirror body 10 and adjusting the relative position of the mirror body 10 and the reflector substrate 40 through the tool, and fixing the reflector 10 to the tool after the adjustment is completed.

[0052] Secondly, assemble the bonding block 20, apply glue to the rear bonding surface 21, and adjust the bonding tool to control the relative position of the rear bonding surface 21 and the side of the mirror body 10 to reach the designed value. Use anhydrous ethanol to clean the excess adhesive, and after preliminary curing, carry out the subsequent bonding work of the bonding block 20 and the bipod 30;

[0053] Next, the biped frame 30 is installed for trial, and the biped frame threaded hole 34 is connected to the countersunk hole 41 of the triangular base plate 40, and the front bonding surface 23 of the bonding block 20 is bonded, and the gap between the bonding block 20 and the biped frame 30 is ensured to meet the design requirements of the bonding process through the adjustment link of the bonding tool, and the excess adhesive is cleaned with anhydrous ethanol after bonding;

[0054] Finally, disassemble the bonding tooling, let it stand for a week until the glue layer is fully cured, and the bonding and assembly process of the side support structure of the large-aperture ground-based reflector is completed.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A large-aperture ground-based reflector side support structure, characterized in that: The support structure includes: A mirror body (10); and A triangular base plate (40), wherein the mirror body (10) is supported on the top of the triangular base plate (40) by three supporting parts evenly distributed on the outer circumference of the mirror body (10); The mirror body (10) and the support portion are bonded together via a bonding block (20), and the bonding block (20) can be connected to a bonding tool to achieve position adjustment and bonding operations.

2. A large-aperture ground-based reflector side support structure according to claim 1, characterized in that: The support portion is a bipedal frame (30), and the bipedal frame (30) comprises a support plate body, and a plurality of threaded holes (34) are formed on the support plate body for connecting the triangular base plate (40); Two legs are fixed obliquely on the support plate body, and longitudinal flexible links (31) and transverse flexible links (32) are orthogonally distributed on the two legs to form a local groove structure; A support block is formed at the intersection of the extension lines of the two legs, and a bipod bonding surface (33) is provided on the support block for bonding the bonding block (20).

3. The large-aperture ground-based reflector side support structure according to claim 1, characterized in that: The two sides of the bonding block (20) are respectively configured as a rear bonding surface (21) and a front bonding surface (23), wherein the rear bonding surface (21) is bonded to the side surface of the mirror body (10), and the front bonding surface (23) is bonded to the support portion; A cylindrical boss is provided at the center of the front bonding surface (23), and a bonding block threaded hole (22) is formed on the cylindrical boss. A bonding tool is connected through the bonding block threaded hole (22) to achieve position adjustment and bonding operations.

4. The large-aperture ground-based reflector side support structure according to claim 1, characterized in that: A mounting boss is provided on the mounting surface of the triangular base plate (40), and a countersunk hole (41) is provided on the mounting boss so that the triangular base plate (40) can be connected to the support portion by means of screws.

5. A large-aperture ground-based reflector side support structure according to any one of claims 1 to 4, characterized in that: The mirror body (10) is made of microcrystalline glass or fused quartz material.

6. A large-aperture ground-based reflector side support structure according to any one of claims 1 to 4, characterized in that: The bonding block (20) is supported by an indium steel material.

7. The large-aperture ground-based reflector side support structure according to claim 2, characterized in that: The bipedal frame (30) is made of titanium alloy material, and the support block is located on the neutral plane of the reflector.

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