CN114415447A - Large-scale space expandable film hood based on composite material large storage ratio superelastic structure - Google Patents
Large-scale space expandable film hood based on composite material large storage ratio superelastic structure Download PDFInfo
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- CN114415447A CN114415447A CN202210097884.1A CN202210097884A CN114415447A CN 114415447 A CN114415447 A CN 114415447A CN 202210097884 A CN202210097884 A CN 202210097884A CN 114415447 A CN114415447 A CN 114415447A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/045—Lens hoods or shields
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than super bullet structure greatly, by combined material super bullet can extend spring, guider, spring rope, stay cable, go up to connect ring subassembly, under connect ring subassembly, film and base and constitute. The base is glued joint or spiro union with guider, and lower part combined material super elasticity can extend spring one end and be connected with guider, and the lower adapter ring subassembly is connected under the other end. Two ends of the upper composite material superelastic and extensible spring are respectively connected with the upper adapter ring component and the lower adapter ring component. And guiding devices are arranged at two ends of each composite material super-elastic extensible spring. Four ropes are arranged around each composite material super-elastic extensible spring, and a plurality of stay cables are arranged on the large-size space expandable film light shield. The film is arranged around the periphery of the supporting structure in a mechanical hinge connection or a gluing mode. The invention has the advantages of simple structure, high rigidity, high reliability, high connection precision and convenient realization of folding and unfolding functions. Therefore, the invention has very good engineering application value.
Description
Technical Field
The invention provides a large-scale space extensible film light shield based on a composite material high storage ratio superelastic structure, and belongs to the field of space navigation.
Background
Space optical cameras all require a light shield to perform the functions of suppressing stray light and controlling the temperature of the camera. The lens hood can isolate the large-density heat flow received by the space optical camera during observation, the thermal stability of the space optical camera structure is kept, meanwhile, the surface material characteristics are utilized, stray light entering the inside of the lens hood is absorbed to the maximum extent, a higher imaging signal-to-noise ratio is ensured, and the lens hood has important significance for improving the imaging contrast and the imaging quality of an optical system. At present, a fixed light shield is generally adopted for small and medium-sized space optical cameras, and the fixed light shield is simple in structure and high in reliability. However, as the space optical camera is developed to have a large field of view and a high resolution, the aperture size of the light shield becomes larger, and the longer light shield generally causes problems such as an increase in weight and a decrease in natural frequency. The traditional fixed light shield is not suitable for the development of a large-caliber space optical system, and an expandable light shield is urgently needed. Therefore, the invention provides the large-scale space expandable film light shield based on the composite material super-elastic structure with the large storage ratio, and the large-scale space expandable film light shield has the advantages of simple structure, high rigidity, high reliability, high connection precision, convenience for realizing the folding and expanding functions and the like. Therefore, the invention has very good engineering application value.
Disclosure of Invention
1. The purpose is as follows:
the invention aims to provide a large-size space expandable film light shield based on a composite material super-elastic structure with a large storage ratio, so as to solve the problems of large volume, heavy weight, low natural frequency and the like of the traditional fixed light shield.
2. The technical scheme is as follows:
the invention relates to a large-scale space expandable film hood based on a composite material large storage ratio super-elastic structure. The base is glued joint or spiro union with guider, and lower part combined material super elasticity can extend spring one end and be connected with guider, and the other end is connected with lower adapter ring subassembly. Two ends of the upper composite material superelastic and extensible spring are respectively connected with the upper adapter ring component and the lower adapter ring component. And guiding devices are arranged at two ends of each composite material super-elastic extensible spring. Four spring ropes are arranged around each composite material super-elastic extensible spring, and a plurality of stay cables are arranged on the large-size space expandable film light shield. The film is arranged on the periphery of the supporting structure in a surrounding mode through mechanical hinge connection or a gluing mode, and the supporting structure plays a supporting role in supporting the film.
The large-size space expandable film light shield based on the composite material large storage ratio super-elastic structure has large deformation capacity along the central line direction of the composite material super-elastic expandable spring, when compression loads are applied to two ends of the composite material super-elastic expandable spring, the composite material super-elastic expandable spring is subjected to large deformation, the thread pitch is reduced, strain energy is stored, and the folding function of the large-size space expandable film light shield is realized. And removing the external compression load, and rapidly recovering the strain energy stored by the composite material super-elastic extensible spring to the initial configuration to realize the expansion function of the large-size space expandable film sunshade.
The composite material selected by the composite material superelastic extensible spring consists of a reinforcing material and a polymer material, wherein the polymer material is epoxy resin, styrene-butadiene, trans-polyisoprene, cyanate ester, polyurethane, polynorbornene, polyimide, bismaleimide, polyamide, polyphenylene sulfide, polyaryletherketone and polyvinyl alcohol, the reinforcing material is carbon fiber, glass fiber, Kevlar fiber, boron fiber, plant fiber or the fabric of the fiber or the chopped fiber of the fiber, and carbon powder, carbon nanoparticles or carbon nanotubes of micron or nanometer level.
The guide device is cylindrical in appearance and made of common metal materials, and the possibility of instability of the composite material superelastic extensible spring in the compression and expansion processes is reduced. The extensible film sunshade is characterized in that one end of the guide device is punched, the pin is inserted into the hole, the composite material ultra-elastic extensible spring can be clamped to keep a compression state, the unfolding process of the composite material ultra-elastic extensible spring can be controlled to effectively solve the instability problem in the unfolding process, the folding and unfolding functions of the large-size space extensible film sunshade are simply and efficiently realized, and the impact on a spacecraft is avoided.
The spring rope and the stay cable are Kevlar ropes. Four spring ropes are arranged around each composite material super-elastic extensible spring, so that the natural frequency of the composite material super-elastic extensible spring can be improved, and a plurality of stay cables are arranged on the large-size space extensible film hood, so that the natural frequency of the large-size space extensible film hood can be improved.
The upper adapter ring assembly and the lower adapter ring assembly are composed of three parts, namely an adapter ring, an adapter and an adapter rod, wherein the adapter ring and the adapter are made of common metal materials, the adapter rod is made of carbon fiber, and the adapter rod is connected with the adapter ring in a screwed mode after being connected with the adapter in an adhesive mode.
The film is a double-sided aluminized polyester film. The film has excellent mechanical property, thermal stability and filtering function. The edge of the film is reinforced by adding side ropes, and the required hexagon of the film is maintained by the ridge ropes.
3. Has the advantages that:
(1) the large-scale space expandable film hood based on the composite material super-elastic structure with large storage ratio has high compression ratio;
(2) the large-scale space expandable film light shield can control the folding and unfolding process, simply and efficiently realizes the folding and unfolding functions of the large-scale space expandable film light shield, and avoids the impact on a spacecraft;
(3) the large-scale space expandable film light shield has higher natural frequency in an expanded state and has high stability and reliability.
Drawings
FIG. 1 is a schematic view of a large space expandable film shade in an expanded state.
Fig. 2 is a schematic view of a large space expandable film shade in a folded state.
Fig. 3 is a schematic view of a composite material superelastic extendable spring.
Figure 4 is a schematic view of the guide in connection with the pin.
FIG. 5 is an enlarged, fragmentary schematic view of the large space expandable film shade of FIG. 2 in a collapsed state.
Fig. 6 is a schematic diagram of three-part connection of an adapter ring, an adapter and an adapter rod.
FIG. 7 is a schematic view of a thin film
In fig. 1: 1. the device comprises a composite material super-elastic extensible spring, 2 a guide device, 3 a spring rope, 4 a stay cable, 5 an upper connecting ring component, 6 a lower connecting ring component, 7 a membrane and 8 a base.
In fig. 4: 9. a pin.
In fig. 6: 10. the adapter ring, 11, adapter, 12, the switching pole.
Detailed Description
The invention is further described below with reference to the drawings and the examples.
The invention relates to a large-scale space expandable film hood (as shown in figure 1) based on a composite material large storage ratio super-elastic structure, which is composed of a composite material super-elastic extensible spring 1, a guide device 2, a spring rope 3, a stay cable 4, an upper connecting ring component 5, a lower connecting ring component 6, a film 7 and a base 8. The base 8 is glued joint or spiro union with guider 2, and lower part combined material super elasticity extension spring one end is connected with guider 2, and the other end is connected with lower adapter ring subassembly 6. Two ends of the upper composite material super-elastic extensible spring are respectively connected with the upper connecting ring component 5 and the lower connecting ring component 6. The two ends of each composite material super-elastic extensible spring 1 are provided with guide devices 2. Four spring ropes 3 are arranged around each composite material super-elastic extensible spring 1, and a plurality of stay cables 4 are arranged on the large-size space expandable film light shield. The film 7 is arranged around the support structure in a mechanical hinged connection or a gluing way, and the support structure supports the film.
The large-scale space expandable film light shield based on the composite material super-elastic extensible spring has large deformation capacity along the central line direction of the composite material super-elastic extensible spring 1, when compression loads are applied to two ends of the composite material super-elastic extensible spring 1, the composite material super-elastic extensible spring 1 is subjected to large deformation, the thread pitch is reduced, strain energy is stored, and the folding function of the large-scale space expandable film light shield is realized (as shown in figure 2). The external compression load is removed, and the strain energy stored by the composite material super-elastic extensible spring 1 is rapidly recovered to the initial configuration (shown in figure 3), so that the unfolding function of the large-space expandable film sunshade is realized.
The composite material selected by the composite material superelastic extensible spring 1 consists of a reinforcing material and a polymer material, wherein the polymer material is epoxy resin, styrene-butadiene, trans-polyisoprene, cyanate ester, polyurethane, polynorbornene, polyimide, bismaleimide, polyamide, polyphenylene sulfide, polyaryletherketone and polyvinyl alcohol, the reinforcing material is carbon fiber, glass fiber, Kevlar fiber, boron fiber, plant fiber or fabric of the above fibers or chopped fibers of the above fibers, and micron-sized or nano-sized carbon powder, carbon nanoparticles or carbon nanotubes.
The guide device 2 is cylindrical in appearance (as shown in fig. 4), and is made of common metal materials, so that the possibility of instability of the composite material superelastic and extensible spring in the compression and expansion processes is effectively reduced. One end of the guide device 2 is punched, the pin 9 is inserted into the hole, the composite material super-elastic extensible spring can be clamped to keep a compressed state (as shown in figure 5), meanwhile, the unfolding process of the composite material super-elastic extensible spring can be controlled to effectively solve the instability problem in the unfolding process, the folding and unfolding functions of the large-size space extensible film sunshade can be simply and efficiently realized, and the impact on a spacecraft is avoided.
The spring rope 3 and the stay cable 4 are Kevlar ropes. Four spring ropes 3 are arranged around each composite material super-elastic extensible spring 1, so that the natural frequency of the composite material super-elastic extensible spring 1 can be improved, and a plurality of stay cables 4 are arranged on the large-size space expandable membrane shade, so that the natural frequency of the large-size space expandable membrane shade can be improved (as shown in figure 5).
The upper adapter ring assembly 5 and the lower adapter ring assembly 6 are composed of three parts, namely an adapter ring 10, an adapter 11 and an adapter rod 12, wherein the adapter ring 10 and the adapter 11 are made of common metal materials, the adapter rod 12 is made of carbon fiber, and the adapter rod 12 is connected with the adapter ring 11 in an adhesive mode and then is in threaded connection with the adapter ring 10 (as shown in fig. 6).
The film 7 of the present invention is a double-sided aluminized polyester film. The film has excellent mechanical property, thermal stability and filtering function. The film is reinforced by cords that add cords at the edges of the film and ridges at each edge of the film to maintain the desired hexagonal shape of the film (as shown in FIG. 7).
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention.
Claims (6)
1. The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than superelasticity structure greatly which characterized in that: the large-scale space expandable film hood consists of a composite material super-elastic extensible spring, a guide device, a spring rope, a stay cable, an upper connecting ring component, a lower connecting ring component, a film and a base; the base is glued or screwed with the guide device, one end of the composite material super-elastic extensible spring at the lower part is connected with the guide device, and the other end of the composite material super-elastic extensible spring at the lower part is connected with the lower connecting ring component; two ends of the upper composite material super-elastic extensible spring are respectively connected with the upper adapter ring component and the lower adapter ring component; two ends of each composite material super-elastic extensible spring are provided with guide devices; four spring ropes are arranged around each composite material super-elastic extensible spring, and stay cables are arranged on the large-size space expandable film light shield; the film is arranged on the periphery of the supporting structure in a surrounding mode through mechanical hinge connection or a gluing mode, and the supporting structure plays a supporting role in supporting the film.
2. The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than superelasticity structure greatly which characterized in that: the composite material super-elastic extensible spring has large deformation capacity along the central line direction of the composite material super-elastic extensible spring, when compression loads are applied to two ends of the composite material super-elastic extensible spring, the composite material super-elastic extensible spring is subjected to large deformation, the thread pitch is reduced, strain energy is stored, and the folding function of the large-size space extensible film light shield is realized; and removing the external compression load, and rapidly recovering the strain energy stored by the composite material super-elastic extensible spring to the initial configuration to realize the expansion function of the large-size space expandable film sunshade.
3. The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than superelasticity structure greatly which characterized in that: the 'guide device' in the step one is cylindrical in appearance and is made of common metal materials, so that the possibility of instability of the composite material superelastic and extensible spring in the compression and expansion processes is effectively reduced; the extensible composite material super-elastic film hood is characterized in that holes are formed in one end of the guide device, the composite material super-elastic extensible springs can be clamped to keep a compression state when the pins are inserted into the holes, meanwhile, the expansion process of the composite material super-elastic extensible springs can be controlled to effectively solve the instability problem existing in the expansion process, the large-size space extensible film hood is simply and efficiently folded and expanded, and the impact on a spacecraft is avoided.
4. The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than superelasticity structure greatly which characterized in that: the rope and the stay cable in the step one are Kevlar ropes; four ropes are arranged around each composite material super-elastic extensible spring to improve the natural frequency of the composite material super-elastic extensible spring, and a plurality of stay cables are arranged on the large-size space expandable film light shield to improve the natural frequency of the large-size space expandable film light shield.
5. The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than superelasticity structure greatly which characterized in that: the upper adapter ring assembly and the lower adapter ring assembly are composed of an adapter ring, an adapter and an adapter rod, the adapter ring and the adapter are made of common metal materials, the adapter rod is made of carbon fibers, and the adapter rod is connected with the adapter ring in a screwed mode after being connected with the adapter.
6. The utility model provides a but large-scale space expansion film lens hood based on combined material accomodates than superelasticity structure greatly which characterized in that: the film in the step one is a double-sided aluminized polyester film; the film has excellent mechanical property, thermal stability and filtering function; the edge of the film is reinforced by adding side ropes, and the required hexagon of the film is maintained by the ridge ropes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210097884.1A CN114415447A (en) | 2022-01-27 | 2022-01-27 | Large-scale space expandable film hood based on composite material large storage ratio superelastic structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210097884.1A CN114415447A (en) | 2022-01-27 | 2022-01-27 | Large-scale space expandable film hood based on composite material large storage ratio superelastic structure |
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| CN114415447A true CN114415447A (en) | 2022-04-29 |
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| CN202210097884.1A Pending CN114415447A (en) | 2022-01-27 | 2022-01-27 | Large-scale space expandable film hood based on composite material large storage ratio superelastic structure |
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2022
- 2022-01-27 CN CN202210097884.1A patent/CN114415447A/en active Pending
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Application publication date: 20220429 |