CN117741902A - Shock-resistant flexible structure of reflecting mirror - Google Patents
Shock-resistant flexible structure of reflecting mirror Download PDFInfo
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- CN117741902A CN117741902A CN202410184865.1A CN202410184865A CN117741902A CN 117741902 A CN117741902 A CN 117741902A CN 202410184865 A CN202410184865 A CN 202410184865A CN 117741902 A CN117741902 A CN 117741902A
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- 230000035939 shock Effects 0.000 title description 2
- 238000013016 damping Methods 0.000 claims abstract description 21
- 229910001374 Invar Inorganic materials 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000003384 imaging method Methods 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract 2
- 230000008859 change Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of space optics, in particular to an impact-resistant flexible structure of a reflector, which comprises the following components: the flexible support frame is of a circular ring structure, the inner ring of the flexible support frame is used for connecting the reflecting mirror, a plurality of strip-shaped flexible grooves are formed in the flexible support frame, and adjacent flexible grooves are overlapped in an staggered mode; the side surface of the flexible support frame is uniformly provided with a plurality of dampers, each damper comprises a pre-tightening flange and a damping column, and the pre-tightening flanges are connected to the side surface of the flexible support frame; the damping column consists of an invar metal wire, and an inner bonding column and an outer bonding column which are respectively fixed at two ends of the invar metal wire. According to the invention, the reflector is flexibly supported by the flexible support frame, so that the shape of the reflector is prevented from being deformed due to the influence of temperature, gravity and the like; meanwhile, the damper is utilized to provide damping for the flexible support frame, so that when the flexible support frame is subjected to large-magnitude impact vibration, the flexible support frame transmits the vibration to the reflecting mirror, and the imaging quality of the space optical instrument is effectively ensured.
Description
Technical Field
The invention relates to the technical field of space optics, and particularly provides an impact-resistant flexible structure of a reflector.
Background
In optoelectronic devices, mirrors play a critical role, which directly affects the imaging quality of the entire optoelectronic system. In the photoelectric instrument, the reflector needs to have stronger capability of resisting external dynamic interference, and the position deviation or deformation of the reflector caused by the action of external force is prevented. The ability of a mirror to resist external dynamic disturbances is mainly dependent on a fixed support structure that, on the basis of efficient positioning of the mirror, needs to be able to reduce external disturbances to the mirror and the effects on the mirror profile.
The fixed supporting mode of the reflecting mirror directly influences the surface shape value of the reflecting mirror, so that wave aberration of the whole system is influenced, and the imaging capability of the system is also influenced. The fixed support of the reflector needs to have certain flexibility, so that the surface shape of the reflector is prevented from being influenced in the gravity change, temperature change or reflector installation process; meanwhile, a certain rigidity is required to reduce the transmission of large-magnitude impact vibration to the reflecting mirror through the fixed supporting structure, and the two factors are contradictory and difficult to balance.
The solid supporting structure of the reflector in the prior art generally adopts a central shaft supporting mode, a back single-point or multi-point supporting mode, a peripheral supporting mode, a combined supporting mode and the like, is mainly designed to face the influence of factors such as gravity, temperature and the like, is mainly flexible, and is difficult to bear high impact mechanical environments such as missiles, shells and the like. The design of excessive rigidity of flexibility is canceled, the influence of a thermal environment such as a temperature field on the surface shape of the reflector is difficult to adapt, the installation plane is required to have excellent quality in the processing technology, the requirement on the assembly technology is high, and the requirement on mass production is not met.
Disclosure of Invention
The invention aims to solve the problems, and provides an impact-resistant flexible structure suitable for a small-caliber and medium-caliber space reflector, which is characterized in that on the basis of flexibly supporting the reflector, a damper which is consistent with the material of the flexible structure is arranged to provide damping for the reflector, so that the reflector can withstand the environment of large-magnitude impact and has good thermal adaptability, dynamic and static mechanical properties.
The invention provides an impact-resistant flexible structure of a reflecting mirror, which comprises the following components: a flexible support frame and a damper; the flexible support frame is of a circular ring structure, and the inner ring of the flexible support frame is used for being connected with the reflecting mirror; a plurality of strip-shaped flexible grooves are formed in the circumferential direction of the flexible support frame, the flexible grooves are perpendicular to the diameter of the flexible support frame, radial fall is formed in the middle section of each flexible groove, and adjacent flexible grooves are overlapped in a staggered mode;
the damper is arranged on the side surface of the flexible support frame and comprises a pre-tightening flange and a damping column, wherein the pre-tightening flange is connected to the side surface of the flexible support frame; the damping column is composed of invar wires, and an inner side bonding column and an outer side bonding column which are respectively fixed at two ends of the invar wires, wherein the inner side bonding column is abutted against the inner side of the flexible groove, and the outer side bonding column is bonded with the pre-tightening flange.
Preferably, at least 3 mounting holes are uniformly formed in the flexible support frame for mounting the flexible support frame to the working position.
Preferably, 3 flexible grooves are uniformly formed along the circumferential direction of the flexible support frame, and the central angle of each flexible groove is 154 degrees.
Preferably, the radial distance of each flexible groove is equal, and the flexible groove is provided with a plurality of radial drops at the middle section position.
Preferably, the radial distance of each flexible groove is equal, the flexible groove is provided with 1 radial drop in the middle position, and the radial drop distance is equal to the radial distance of the staggered lap joint position between the adjacent flexible grooves.
Preferably, the flexible support frame and the damper are made of invar steel materials with the same thermal expansion coefficient as that of the reflector.
Preferably, at least two through holes are formed in the edge position of the pre-tightening flange, and the pre-tightening flange is fixed to the side face of the flexible supporting frame through bolts.
Preferably, a through hole is arranged in the middle of the pre-tightening flange and is used for being connected with the outer bonding column.
Preferably, both ends of the flexible groove are provided with round corner structures.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the reflector is flexibly supported by the flexible support frame, so that the shape of the reflector is prevented from being deformed due to the influence of temperature, gravity and the like; simultaneously, utilize the attenuator to provide the damping for flexible support frame, avoid when receiving the impact vibration of a large scale, flexible support frame will vibrate the transmission to the speculum, avoided among the prior art pure rigid support to produce concentrated stress easily, lead to mirror surface deformation, also avoided among the prior art pure flexible support to transmit external impact vibration to the speculum easily, lead to speculum vibration scheduling problem. The invention can not only ensure the imaging quality of the space optical instrument, but also reduce the development period and the development cost of the reflecting mirror component.
Drawings
FIG. 1 is a front view and a side view of a reflector impact resistant flexible structure provided in accordance with an embodiment of the present invention;
fig. 2 is a front view and a side view of a flexible support frame provided in accordance with an embodiment of the present invention;
FIG. 3 is an exploded view of a reflector impact resistant flexible structure provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic structural view of a damper provided according to an embodiment of the present invention.
Wherein the reference numerals include: mirror 1, flexible support frame 2, annular body 201, flexible groove 202, radial head 2021, mounting hole 203, damper 3, pre-tightening flange 301, through hole 3011, round hole 3012, damping post 302, outside bonding post 3021, invar wire 3022, inside bonding post 3023.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention.
As shown in fig. 1, the embodiment of the invention provides an impact-resistant flexible structure of a reflector, which is mainly used for supporting and fixing a reflector 1 with a small and medium aperture, and the main structure of the impact-resistant flexible structure comprises a flexible supporting frame 2 and a damper 3, wherein the flexible supporting frame 2 and the damper 3 are made of invar steel materials with the same thermal expansion coefficient as the reflector 1.
As shown in fig. 2, the flexible supporting frame 2 includes an annular main body 201, a flexible groove 202 and a mounting hole 203, the annular main body 201 is in a circular ring structure, an inner ring of the annular main body 201 is used for mounting the reflecting mirror 1, the reflecting mirror 1 is connected with the annular main body 201 through an adhesive process, good coaxiality between the reflecting mirror 1 and the annular main body 201 needs to be ensured, the reflecting mirror 1 and the annular main body 201 are placed under a constant temperature condition for curing after being adhered, and whether the coaxiality between the reflecting mirror 1 and the annular main body 201 meets the requirement is detected after curing, if not, the reflecting mirror needs to be further adjusted.
On the annular surface of the annular body 201, 3 flexible grooves 202 are uniformly provided, the flexible grooves 202 are provided along the circumferential direction of the annular body 201, the flexible grooves 202 are perpendicular to the diameter of the annular body 201, and the radial distance between each flexible groove 202 and the center of the annular body 201 is equal. The whole flexible grooves 202 are in a strip-shaped arc structure, the central angle corresponding to each flexible groove 202 is 154 degrees, the adjacent two flexible grooves 202 are in front-back staggered lap joint, the flexible support frame 2 is equivalently divided into an inner ring and an outer ring which are connected with each other by 3 flexible grooves 202, the flexible grooves 202 exist between the inner ring and the outer ring, the annular main body 201 has good flexibility, connecting arms are formed at the staggered lap joint positions of the adjacent flexible grooves 202, and the inner ring and the outer ring are connected through the connecting arms. The two ends of the flexible groove are respectively provided with a round corner structure, and a radial drop 2021 is further arranged in the middle of the flexible groove 202, so that each flexible groove 202 is divided into two sections, the two sections are positioned on circles with different diameters, and the radial drop 2021 can enable the flexible support frame 2 to have a deformation allowance along the circumferential direction of the flexible support frame 2. The existing reflector supporting structure is only provided with the grooves on the supporting structure, so that the supporting structure can only have a certain deformation allowance in the radial direction, and the deformation in the circumferential direction can not be realized. In addition, the design can reduce the occupied space of the annular main body 201, reduce the radial width of the annular main body 201 as much as possible, and can be applied to design scenes with strict space size requirements.
Adjacent flexible slots 202 are not in communication with each other, and the radial distance of adjacent flexible slots 202 at the interdigitation location is equal to the radial drop 2021 of flexible slots 202. When the reflector 1 is affected by temperature, gravity, stress generated by gluing and other factors, the flexible groove 202 enables the annular main body 201 to have a certain deformation allowance, so that the phenomenon that the surface shape changes due to larger concentrated stress generated by the mirror surface of the reflector 1 is avoided. Because the space optical instrument is easier to encounter temperature abrupt change, gravity abrupt change and other conditions, the flexible support is of great importance, and the existing rigid support mode is difficult to cope with the conditions, so that the imaging quality is influenced, and the reflector 1 is extremely easy to cause irreversible damage.
As a preferred embodiment, a plurality of radial steps 2021 may be disposed in the middle of the flexible slot 202, where the distance of each radial step 2021 may be designed according to specific requirements and the size of the annular body 201.
The annular body 201 is further provided with a plurality of mounting holes 203, and the annular body 201 and the reflecting mirror are mounted at a specified working position by bolts passing through the mounting holes 203, and the mounting holes 203 may be provided as smooth through holes or as screw holes. Preferably, every 2 mounting holes 203 are formed as a group, and 3 groups of mounting holes 203 are uniformly formed on the annular main body 201, the central angle between two adjacent groups of mounting holes 203 is 120 degrees, and a proper distance is required between two mounting holes 203 in each group to improve the mounting stability of the annular main body 201.
The dampers 3 are uniformly arranged on the side surface of the flexible supporting frame 2, in the embodiment, 3 dampers 3 are arranged in total, and the central angle between two adjacent dampers 3 is 120 degrees. As shown in fig. 3, the damper 3 is composed of a pre-tightening flange 301 and a damping column 302, a plurality of through holes 3011 are formed in the edge position of the pre-tightening flange 301, matched threaded holes are formed in corresponding positions of the side face of the flexible supporting frame 2, and the pre-tightening flange 301 is locked on the side face of the flexible supporting frame 2 through bolts penetrating through the through holes 3011 and the threaded holes. A circular hole 3012 is also provided in the middle of the pre-tightening flange 301 for mounting and locking the damping post 302.
As shown in fig. 4, the damping post 302 sequentially includes, from the outside to the inside in the radial direction: an outer adhesive post 3021, invar wires 3022, and an inner adhesive post 3023. The outer bonding post 3021 and the inner bonding post 3023 are welded on two sides of the invar wire 3022, the outer bonding post 3021 is matched with a round hole 3012 on the pre-tightening flange 301, and the damping post 302 is bonded with the pre-tightening flange 301 through the outer bonding post 3021. A blind hole is formed in a corresponding position of the flexible support frame 2 and used for accommodating the invar wire 3022 and the inner side bonding post 3023, the depth of the blind hole just penetrates through the flexible groove 202, after the outer side bonding post 3021 is bonded with the round hole 3012, the inner side end face of the inner side bonding post 3023 is abutted against the inner side face of the flexible groove 202 of the flexible support frame 2, and the inner side bonding post 3023 is connected by using a bonding process, namely, is equivalent to that the damping post 302 is abutted against the inner ring of the flexible support frame 2. In the prior art, the design of the damping structure is also available, but the damping structure is applied to resisting micro-vibration, the damping material is rubber or other flexible damping rubber, the design can only resist micro-vibration and cannot bear large-magnitude impact, and the embodiment of the invention also needs to consider the influence of temperature change on the surface shape of the reflector 1, but the thermal expansion coefficient of the damping material such as rubber is larger, serious thermal deformation can occur, the damping material cannot resist large-magnitude impact, and the serious thermal deformation can also cause larger influence on the surface shape of the reflector 1.
According to the anti-impact flexible structure of the reflector, the reflector 1 is flexibly supported, the influence of factors such as gravity change, temperature change, assembly and adjustment processes and the like on the surface shape of the reflector 1 is reduced, meanwhile, when large-magnitude impact vibration is caused on the anti-impact flexible structure of the reflector, the invar steel wires 3022 can play a role in vibration reduction, vibration is prevented from being transmitted to the reflector 1 as much as possible, the stability of the reflector 1 is guaranteed to the greatest extent, the anti-interference capability of the reflector 1 is effectively improved, and a space optical instrument maintains good imaging quality.
While embodiments of the present invention have been illustrated and described above, it will be appreciated that the above described embodiments are illustrative and should not be construed as limiting the invention. Variations, modifications, alternatives and variations of the above-described embodiments may be made by those of ordinary skill in the art within the scope of the present invention.
The above embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (9)
1. A flexible structure for a reflector to resist impact, comprising: a flexible support frame and a damper; the flexible support frame is of a circular ring structure, and the inner ring of the flexible support frame is used for being connected with the reflecting mirror; a plurality of strip-shaped flexible grooves are formed in the circumferential direction of the flexible supporting frame, the flexible grooves are perpendicular to the diameter of the flexible supporting frame, radial fall is formed in the middle section of each flexible groove, and adjacent flexible grooves are overlapped in a staggered mode;
the damper is arranged on the side face of the flexible supporting frame and comprises a pre-tightening flange and a damping column, wherein the pre-tightening flange is connected to the side face of the flexible supporting frame; the damping column is composed of invar wires, and an inner side bonding column and an outer side bonding column which are respectively fixed at two ends of the invar wires, wherein the inner side bonding column is abutted to the inner side of the flexible groove, and the outer side bonding column is bonded with the pre-tightening flange.
2. The flexible structure of claim 1, wherein the flexible support frame is further provided with at least 3 mounting holes for mounting the flexible support frame to a working position.
3. The impact-resistant flexible structure of a reflector as claimed in claim 1, wherein 3 flexible grooves are uniformly formed along the circumferential direction of the flexible support frame, and the central angle of each flexible groove is 154 degrees.
4. The reflector impact resistant flexible structure as defined in claim 1, wherein each of said flexible grooves has an equal radial distance, said flexible groove having a plurality of radial drops at a mid-section position.
5. The flexible structure of claim 1, wherein each of said flexible grooves has an equal radial distance, said flexible grooves being provided with 1 radial drop at an intermediate location, the radial drop being equal to the radial distance between adjacent ones of said flexible grooves at the interdigitating locations.
6. The flexible impact resistant structure of claim 1, wherein said flexible support frame and said damper are each made of invar material having the same coefficient of thermal expansion as the mirror.
7. The structure of claim 1, wherein the pre-tightening flange has at least two through holes at the edge thereof, and the pre-tightening flange is fixed to the side of the flexible support frame by bolts.
8. The impact resistant flexible structure of claim 7, wherein said pre-tightening flange has a through hole in the middle for connecting with said outer adhesive post.
9. The flexible impact resistant structure of claim 1, wherein both ends of the flexible groove are provided with rounded corner structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410184865.1A CN117741902B (en) | 2024-02-19 | 2024-02-19 | Shock-resistant flexible structure of reflecting mirror |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410184865.1A CN117741902B (en) | 2024-02-19 | 2024-02-19 | Shock-resistant flexible structure of reflecting mirror |
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| Publication Number | Publication Date |
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| CN117741902A true CN117741902A (en) | 2024-03-22 |
| CN117741902B CN117741902B (en) | 2024-05-14 |
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| CN202410184865.1A Active CN117741902B (en) | 2024-02-19 | 2024-02-19 | Shock-resistant flexible structure of reflecting mirror |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262281A (en) * | 2011-08-02 | 2011-11-30 | 中国科学院长春光学精密机械与物理研究所 | Flexible supporting mechanism for space remote sensor reflector |
| CN105283789A (en) * | 2013-02-13 | 2016-01-27 | 齐戈股份有限公司 | Monolithic optical components with integrated flexures |
| CN105353496A (en) * | 2015-11-24 | 2016-02-24 | 北京空间机电研究所 | High-stability off-axis reflecting mirror supporting structure |
| CN109669253A (en) * | 2019-01-31 | 2019-04-23 | 中国科学院西安光学精密机械研究所 | Large caliber reflecting mirror vibration damping flexible support structure and mirror assembly |
| CN109946812A (en) * | 2019-03-29 | 2019-06-28 | 中国科学院上海技术物理研究所 | It is a kind of use at low temperature reflecting mirror shafting support and clamping device |
| CN110231691A (en) * | 2019-07-18 | 2019-09-13 | 长光卫星技术有限公司 | A kind of intersection hinge type flexible support structure |
| US20200049976A1 (en) * | 2017-04-11 | 2020-02-13 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Micromechanical mirror device |
-
2024
- 2024-02-19 CN CN202410184865.1A patent/CN117741902B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262281A (en) * | 2011-08-02 | 2011-11-30 | 中国科学院长春光学精密机械与物理研究所 | Flexible supporting mechanism for space remote sensor reflector |
| CN105283789A (en) * | 2013-02-13 | 2016-01-27 | 齐戈股份有限公司 | Monolithic optical components with integrated flexures |
| CN105353496A (en) * | 2015-11-24 | 2016-02-24 | 北京空间机电研究所 | High-stability off-axis reflecting mirror supporting structure |
| US20200049976A1 (en) * | 2017-04-11 | 2020-02-13 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Micromechanical mirror device |
| CN109669253A (en) * | 2019-01-31 | 2019-04-23 | 中国科学院西安光学精密机械研究所 | Large caliber reflecting mirror vibration damping flexible support structure and mirror assembly |
| CN109946812A (en) * | 2019-03-29 | 2019-06-28 | 中国科学院上海技术物理研究所 | It is a kind of use at low temperature reflecting mirror shafting support and clamping device |
| CN110231691A (en) * | 2019-07-18 | 2019-09-13 | 长光卫星技术有限公司 | A kind of intersection hinge type flexible support structure |
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| CN117741902B (en) | 2024-05-14 |
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