CN110866865B - Space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding - Google Patents
Space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding Download PDFInfo
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- 238000000034 method Methods 0.000 description 6
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Abstract
The invention relates to a space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding, which comprises an air inlet valve, a total inflation connector, a distributed inflation connector, a central column structure, a top annular inflation tube, a middle annular inflation tube, a bottom outer annular inflation tube, a bottom middle annular inflation tube, a radial inflation tube, a longitudinal inflation tube and a skin. According to the invention, folding packaging is carried out according to crease design, folding and folding with large storage ratio can be realized, and ordered inflation and unfolding of the large-scale space flexible inflation and unfolding structure can be realized under the driving of inflation gas. The invention can be widely applied to a large-sized cylindrical space flexible inflatable unfolding structure due to the characteristics of large storage ratio, orderly control of unfolding and the like.
Description
Technical Field
The invention relates to a space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding, and belongs to the field of space flexible structure design.
Background
With further development of space exploration technology, the volume of the spacecraft is gradually increased. However, due to the limitation of the fairing envelope of the carrier rocket, the volume of the spacecraft cannot be built very large, and the on-orbit size volume of the spacecraft is severely limited. In order to realize the large-volume space of the spacecraft in orbit, the space flexible unfolding structure spacecraft is studied at home and abroad.
The spacecraft studied abroad is basically directed to flat-type deployment structures, such as folding deployment applications of solar sails. However, for three-dimensional structures, such as space-based air tanks, the internal inflation is used for deployment, a large amount of inflation is needed to ensure volume, and the volume is limited.
Disclosure of Invention
The invention solves the technical problems that: in order to overcome the defects of the prior art, a space flexible unfolding structure capable of realizing two-dimensional step-by-step unfolding is provided, and the space flexible unfolding structure can simultaneously realize ordered unfolding and has a large structure containing ratio so as to meet the size envelope requirement of a carrier rocket fairing.
The solution of the invention is as follows:
a space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding, which comprises an air inlet valve, a total inflation connector, a distributed inflation connector, a central column structure, a top annular inflation tube, a middle annular inflation tube, a bottom outer annular inflation tube, a bottom middle annular inflation tube, a radial inflation tube, a longitudinal inflation tube and a skin,
the top annular inflation tube, the middle annular inflation tube, the bottom outer annular inflation tube and the longitudinal inflation tube are connected through a skin, and the bottom outer annular inflation tube, the bottom middle annular inflation tube and the radial inflation tube are connected through a skin;
the center column structure is a rigid support of the whole structure at the center of the bottom of the space flexible unfolding structure, the lateral direction of the center column structure is directly connected with 8 radial air charging pipes, the top end of the inside of each radial air charging pipe comprises 1 distributed air charging connector, 8 air charging connectors are used for charging the inside of the radial air charging pipe so as to charge other air charging pipes, the bottom of the center column structure is provided with a total air charging connector used for being connected with an external air source,
the inner top end of the radial inflation tube is connected with the central column structure, the middle section of the radial inflation tube is connected with the middle annular inflation tube at the bottom, the outer top end of the radial inflation tube is connected with the outer annular inflation tube at the bottom, and the connected parts of the relevant inflation tubes are communicated internally so as to ensure the gas to be communicated during inflation;
when in inflation, the top annular inflation tube, the middle annular inflation tube, the bottom outer annular inflation tube, the bottom middle annular inflation tube, the radial inflation tube and the longitudinal inflation tube stretch the outer shape of the unfolding structure, and the skin is stretched under the action of each inflation tube, so that an inner space is enclosed; the space flexible unfolding structure is in a folded state, the central column structure is still connected with the radial inflation tube, and the top annular inflation tube, the middle annular inflation tube, the bottom outer annular inflation tube, the bottom middle annular inflation tube, the radial inflation tube, the longitudinal inflation tube and the skin are folded in two dimensions step by step, so that the large structure storage ratio is realized.
Further, the top annular inflation tube, the middle annular inflation tube and the bottom outer ring annular inflation tube are at least 5 sides, and the side lengths are equal.
Furthermore, 4 middle annular inflation pipes are respectively connected with 16 longitudinal inflation pipes, the 16 longitudinal inflation pipes are divided into 5 sections, 1 air inlet valve is arranged on each of 64 connection surfaces, and after the inflation of the next section of longitudinal inflation pipe is completed, the air inlet valve is opened, and the last section of longitudinal inflation pipe begins to inflate.
Further, the top surface of the bottom outer ring circumferential air charging pipe is connected with the bottom ends of the 16 longitudinal air charging pipes, 1 air inlet valve is respectively arranged in the bottom ends of the longitudinal air charging pipes, 16 air charging valves are arranged in total, when the pressure of the radial air charging pipe, the bottom middle circumferential air charging pipe and the bottom outer ring circumferential air charging pipe reaches 20kPa, the air charging valves are opened when the pressure reaches the opening pressure of the air charging valves, and the 16 longitudinal air charging pipes are filled with air.
Further, the middle circumferential inflatable tube is circumferentially and uniformly distributed on the longitudinal inflatable tube to form a plurality of structural sections with equal size, and the adjacent structural sections encircle the z axis to form an annular frame.
Further, in the folded state of the space flexible unfolding structure, an external air source charges air into the central column structure through the total air charging connector, the air simultaneously enters the radial air charging pipe through the distributed air charging connector, and the air simultaneously enters the bottom middle annular air charging pipe and the bottom outer annular air charging pipe through the radial air charging pipe; when the gas pressure in the radial gas-filled tube, the bottom middle annular gas-filled tube and the bottom outer annular gas-filled tube reaches the opening pressure of the gas inlet valve between the bottom outer annular gas-filled tube and the longitudinal gas-filled tube, the radial gas-filled tube, the bottom middle annular gas-filled tube and the bottom outer annular gas-filled tube are in the same plane.
Further, the gas enters the longitudinal gas tube from the bottom outer ring circumferential gas tube, the annular frames are filled up from bottom to top in sequence, the distributed expansion of the annular frames is realized, each structural section reaches the same size, and the side surfaces of each layer of annular frames are synchronously expanded; until the top circumferential inflation tube is completely filled, so that the deviation of the central axis and the z axis of the space flexible deployment structure is not more than 5% of the side length of the bottom outer circumferential inflation tube.
Further, when the space flexible unfolding structure is folded after unfolding, the total inflation connector, the distributed inflation connector and the air inlet valve are all opened, pressure parallel to the z axis is applied to the top annular inflation tube through the outside, and air is finally discharged from the total inflation connector through the air inlet valve and the distributed inflation connector, so that the longitudinal inflation tube, the bottom outer annular inflation tube, the middle annular inflation tube and the top annular inflation tube are all in a plane perpendicular to the z axis, and the central axis of the plane is coaxial with the z axis.
Further, the wave crests of folds are formed along the connecting lines of the midpoints of the sides of the outer ring circumferential inflatable tube at the bottom and the inner top end of the radial inflatable tube, the wave troughs of the folds are formed along the axis of the outer ring radial inflatable tube, the central column structure is rotated to drive the other structures to synchronously rotate towards the central column structure in a fitting mode, and the storage ratio of the volume of the folded outer envelope to the volume of the unfolded outer envelope is not more than 1:100.
Further, when the folding device is folded, synchronous rotation folding is realized by adopting bottom rotation and Zhou Xiangjia auxiliary tools.
Compared with the prior art, the invention has the beneficial effects that:
(1) The combination of the folding scheme and the rotary folding scheme can realize folding and furling of the cylindrical space flexible unfolding structure with large storage ratio;
(2) In the folding and furling state, the two-dimensional stepwise expansion of the space flexible expansion structure can be realized by controlling the air inlet valve to be inflated step by step, so that the expansion process of the space flexible inflation expansion structure is orderly controlled;
(3) The invention can open the whole shape through the skeleton type inflatable tube structure, and can reduce the gas consumption compared with a pure skin type space inflatable structure, and can be made into a hundred-meter space structure.
Drawings
FIG. 1 is a three-dimensional layout of the present invention;
FIG. 2 is a schematic illustration of the folding process of the present invention;
FIG. 3 is a schematic illustration of a rotary folding crease of the present invention;
fig. 4 is a schematic diagram of the deployment process of the present invention.
Detailed Description
The invention is further illustrated below with reference to examples.
The two-dimensional step-by-step expansion space flexible expansion structure mainly aims at the requirement of a large space flexible expansion structure of future on-orbit flight, and is folded and folded with a large storage ratio during launching, and the whole structure is orderly expanded by controlling the inflating sequence of an air inlet valve on the orbit, so that the designed large space structure is obtained.
In the launching state, the space flexible unfolding structure spacecraft is in a folding and folding state so as to meet the size envelope requirement of the fairing of the carrier rocket. After the launching is carried out, the space flexible unfolding structure is unfolded through inflation, and the design outline dimension is gradually achieved, so that the requirement of large volume space on the track is met.
The invention relates to a large-storage-ratio and no more than 1:100, and the size of the outer package after being unfolded is no less thanThe size of the outer envelope after the storage is not more than +.>As shown in fig. 1, the space flexible unfolding structure comprises an air inlet valve 11, a total air charging connector 10, a distributed air charging connector 9, a central column structure 8, a top annular air charging tube 7, a middle annular air charging tube 6, a bottom outer annular air charging tube 5, a bottom middle annular air charging tube 4, a radial air charging tube 3, a longitudinal air charging tube 2 and a skin 1.
The top annular inflation tube 7, the middle annular inflation tube 6, the bottom outer annular inflation tube 5 and the longitudinal inflation tube 2 are connected through the skin 1, and the bottom outer annular inflation tube 5, the bottom middle annular inflation tube 4 and the radial inflation tube 3 are connected through the skin 1.
In addition to the inlet valve 11, the total air charge connector 10, the distributed air charge connector 9, and the central column structure 8, other structures are flexible materials that are capable of withstanding the space environment, such as polyimide-based materials.
The number of edges of the top annular inflation tube 7, the middle annular inflation tube 6 and the bottom outer annular inflation tube 5 is at least 5, and the edge lengths are equal. The longitudinal inflation tube 2 must be perpendicular to the plane of the top 7, middle 6, and bottom 5 circumferential inflation tubes. The middle annular inflation tube 6 is uniformly distributed on the longitudinal inflation tube 2 in the annular direction to form a plurality of structural sections with equal size, and the adjacent structural sections encircle the z axis to form an annular frame.
In the folded state, the external air source charges air into the central column structure 8 through the total air charging connector 10, the air simultaneously enters the radial air charging tube 3 through the distribution air charging connector 9, and the air simultaneously enters the bottom middle annular air charging tube 4 and the bottom outer annular air charging tube 5 through the radial air charging tube 3. When the gas pressure in the radial gas-filled tube 3, the bottom middle annular gas-filled tube 4 and the bottom outer annular gas-filled tube 5 reaches the opening pressure of the gas inlet valve 11 between the bottom outer annular gas-filled tube 5 and the longitudinal gas-filled tube 2, the radial gas-filled tube 3, the bottom middle annular gas-filled tube 4 and the bottom outer annular gas-filled tube 5 are in the same plane. The gas enters the longitudinal gas-filled tube 2 from the bottom outer ring circumferential gas-filled tube 5, the annular frames are filled up from bottom to top in sequence, the distributed expansion of the annular frames is realized, each structural section reaches the same size, and the side surfaces of each layer of annular frames are synchronously expanded. Until the top circumferential inflation tube 7 is completely filled such that the central axis of the spatial flexible deployment structure is not offset from the z-axis by more than 5% of the side length of the bottom outer circumferential inflation tube 5.
When the space flexible unfolding structure is folded after being unfolded, the total inflation connector 10, the distributed inflation connector 9 and the air inlet valve 11 are opened, pressure parallel to the z axis is applied to the top annular inflation tube 7 through the outside, and air is finally discharged from the total inflation connector 10 through the air inlet valve 11 and the distributed inflation connector 9, so that the longitudinal inflation tube 2, the bottom outer annular inflation tube 5, the middle annular inflation tube 6 and the top annular inflation tube 7 are all in a plane perpendicular to the z axis, and the central axis of the plane is coaxial with the z axis.
The connection line between the midpoint of each side of the bottom outer ring circumferential inflation tube 5 and the inner top end of the radial inflation tube 3 forms the crest of the crease, as shown by a solid line in fig. 3, and the trough of the crease is formed along the axis of the outer ring radial inflation tube 3, as shown by a broken line in fig. 3, and is folded. And rotating the central column structure 8 to drive the other structures to synchronously joint and rotate to the central column structure 8, so that the storage ratio of the volume of the folded outer envelope to the volume of the unfolded outer envelope is not more than 1:100.
When the folding device is folded, synchronous rotation folding is realized by adopting bottom rotation and Zhou Xiangjia auxiliary tools.
The central column structure 8 is connected with the radial air charging pipes 3 and is used as a bottom support, and the outer shape of the central column structure is expanded by the top annular air charging pipe 7, the middle annular air charging pipe 6, the bottom outer annular air charging pipe 5, the bottom middle annular air charging pipe 4, the radial air charging pipes 3 and the longitudinal air charging pipes 2, and the skin 1 is stretched under the action of the air charging pipes, so that an inner space is enclosed; under the folding and furling state, the central column structure 8 is still connected with the radial inflatable tube 3, and the top annular inflatable tube 7, the middle annular inflatable tube 6, the bottom outer annular inflatable tube 5, the bottom middle annular inflatable tube 4, the radial inflatable tube 3, the longitudinal inflatable tube 2 and the skin 1 are folded step by step in two dimensions according to the folding scheme design, so that the large structure storage ratio is realized.
The center column structure 8 is a rigid support of the whole structure at the center of the bottom of the space flexible unfolding structure, the side direction of the center column structure 8 is directly connected with 8 radial inflation tubes 3, and the top end of the inside of each radial inflation tube comprises 1 distributed inflation connector 9, 8 distributed inflation connectors are used for inflating the inside of the radial inflation tube 3, so that other inflation tubes are inflated. A general inflation connector 10 is arranged at the bottom of the central column structure 8 and is used for connecting with an external air source,
the inner top end of the radial air charging tube 3 is connected with the central column structure 8, the middle section is connected with the bottom middle annular air charging tube 4, the outer top end is connected with the bottom outer annular air charging tube 5, the connected parts of the relevant air charging tubes are communicated internally so as to ensure the through of air during air charging,
the top surface of the bottom outer ring circumferential air charging pipe 5 is connected with the bottom ends of the 16 longitudinal air charging pipes 2, 1 air inlet valve 11 is respectively arranged in the bottom ends of the longitudinal air charging pipes 2, and 16 air charging valves are respectively arranged in the bottom ends of the longitudinal air charging pipes 2, when the pressures of the radial air charging pipes 3, the bottom middle circumferential air charging pipe 4 and the bottom outer ring circumferential air charging pipe 5 reach 20kPa, the air charging valves 11 are opened, and gas is charged into the 16 longitudinal air charging pipes 2;
the middle annular inflatable tubes 6 are 4 in number and are respectively connected with 16 longitudinal inflatable tubes 2, the 16 longitudinal inflatable tubes 2 are divided into 5 sections, each of the 64 connecting surfaces is provided with 1 air inlet valve 11, after the inflation of the next section of longitudinal inflatable tube 2 is completed, the air inlet valves 11 are opened, and the last section of longitudinal inflatable tube 2 begins to inflate.
The top circumferential gas-filled tube 7 is connected with the top ends of the 16 longitudinal gas-filled tubes 2, the connected parts of the relevant gas-filled tubes are communicated internally so as to ensure the gas to be communicated during gas filling,
the folding scheme is as follows: in the initial overall unfolding state (shown as (1) in fig. 2), the space flexible unfolding structure folds the parts of the 16 longitudinal inflatable tubes 2 among the top annular inflatable tube 7, the middle annular inflatable tube 4 and the bottom outer annular inflatable tube 5, and the folding angles are outward (shown as (2) and (3) in fig. 2). All of the inflation tubes are then flattened (as shown at (4) in fig. 2) along the axis Z of the spatially flexible deployment structure. Finally, the flattened spatial flexible unfolding structures are folded up and down along the lines which are uniformly distributed along the 16 circumferential directions and tangent to the central column structure 8 (as shown in (5) and (6) in fig. 2), and the folding structures are rotated around the central column structure 8 along with the tangent folds until all the folding structures are attached in place (as shown in (7) in fig. 2).
The working process of the two-dimensional stepwise-unfolded space flexible unfolding structure is the reverse process of the folding process, as shown in fig. 4, and is as follows: the central column structure 8 is inflated through an air source to the total inflation connector 10 in a folded and collapsed state, and then the radial inflation tube 3 is inflated through the distributed inflation connectors 9, so that the whole structure is gradually rotated and unfolded; after the radial inflation tube 3, the bottom middle annular inflation tube 4 and the bottom outer annular inflation tube 5 are inflated, the whole structure is unfolded into an octagonal plane structure; the air inlet valve 11 in the bottom end of the longitudinal air charging pipe 2 is controlled to charge the longitudinal air charging pipe 2, so that the whole structure starts to be unfolded in the axial direction; when the longitudinal inflation tube 2 is fully filled with climate, the top circumferential inflation tube begins to inflate until full.
The foregoing is merely illustrative of the best embodiments of the present invention, and the present invention is not limited thereto, but any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be construed as falling within the scope of the present invention.
What is not described in detail in the present specification belongs to the known technology of those skilled in the art.
Claims (5)
1. The space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding is characterized by comprising an air inlet valve (11), a total air charging connector (10), distributed air charging connectors (9), a central column structure (8), a top annular air charging tube (7), a middle annular air charging tube (6), a bottom outer annular air charging tube (5), a bottom middle annular air charging tube (4), a radial air charging tube (3), a longitudinal air charging tube (2) and a skin (1),
the top annular inflation tube (7), the middle annular inflation tube (6) and the bottom outer annular inflation tube (5) are connected with the longitudinal inflation tube (2) through the skin (1), and the bottom outer annular inflation tube (5), the bottom middle annular inflation tube (4) and the radial inflation tube (3) are connected through the skin (1);
the center column structure (8) is a rigid support of the whole structure at the center of the bottom of the space flexible unfolding structure, the side direction of the center column structure (8) is directly connected with 8 radial air charging pipes (3), the top end of the inside of each radial air charging pipe comprises 1 distributed air charging connector (9), 8 of the center column structure is used for charging the inside of the radial air charging pipe (3) so as to charge other air charging pipes, the bottom of the center column structure (8) is provided with a total air charging connector (10) which is used for being connected with an external air source,
the inner top end of the radial inflation tube (3) is connected with the central column structure (8), the middle section is connected with the bottom middle annular inflation tube (4), the outer top end is connected with the bottom outer annular inflation tube (5), and the connected parts of the relevant inflation tubes are communicated internally so as to ensure the penetration of gas during inflation;
when in inflation, the top annular inflation tube (7), the middle annular inflation tube (6), the bottom outer annular inflation tube (5), the bottom middle annular inflation tube (4), the radial inflation tube (3) and the longitudinal inflation tube (2) expand the shape of the unfolding structure, and the skin (1) is stretched under the action of each inflation tube, so that an inner space is enclosed; the space flexible unfolding structure is characterized in that under the folding and furling state, a central column structure (8) is still connected with a radial air charging tube (3), and a top annular air charging tube (7), a middle annular air charging tube (6), a bottom outer annular air charging tube (5), a bottom middle annular air charging tube (4), the radial air charging tube (3), a longitudinal air charging tube (2) and a skin (1) are folded step by step in two dimensions, so that a large structure storage ratio is realized;
the middle annular inflatable tubes (6) are respectively connected with 16 longitudinal inflatable tubes (2), the 16 longitudinal inflatable tubes (2) are divided into 5 sections, each of the 64 connecting surfaces is provided with 1 air inlet valve (11), after the next section of the longitudinal inflatable tubes (2) is inflated, the air inlet valves (11) are opened, and the last section of the longitudinal inflatable tubes (2) starts to be inflated;
the top surface of the bottom outer ring circumferential air charging pipe (5) is connected with the bottom ends of the 16 longitudinal air charging pipes (2), and the inside of the bottom ends of the longitudinal air charging pipes (2) is respectively provided with 1 air inlet valve (11), 16 air charging pipes are filled when the pressures of the radial air charging pipes (3), the bottom middle circumferential air charging pipe (4) and the bottom outer ring circumferential air charging pipe (5) reach 20kPa, and when the pressure reaches the opening pressure of the air inlet valves, the air inlet valves (11) are opened, and the air is charged into the 16 longitudinal air charging pipes (2);
the middle annular inflation tube (6) is uniformly distributed on the longitudinal inflation tube (2) in the annular direction to form a plurality of structural sections with equal size, and the adjacent structural sections encircle the z axis to form an annular frame;
when the space flexible unfolding structure is folded after being unfolded, the total inflation connector (10), the distributed inflation connector (9) and the air inlet valve (11) are all opened, pressure parallel to the z axis is applied to the top annular inflation tube (7) through the outside, and air passes through the air inlet valve (11) and the distributed inflation connector (9) and is finally discharged by the total inflation connector (10), so that the longitudinal inflation tube (2), the bottom outer annular inflation tube (5), the middle annular inflation tube (6) and the top annular inflation tube (7) are all positioned in a plane perpendicular to the z axis, and the central axis of the plane is coaxial with the z axis;
when the folding device is folded, synchronous rotation folding is realized by adopting bottom rotation and Zhou Xiangjia auxiliary tools.
2. A spatially flexible deployment structure for achieving two-dimensional stepwise deployment according to claim 1, wherein the top hoop gas-filled tube (7), the middle hoop gas-filled tube (6), and the bottom outer hoop gas-filled tube (5) are at least 5 sides and have equal side lengths.
3. A space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding as claimed in claim 1, characterized in that in a folded state, an external air source charges air into the central column structure (8) through the total air charging connector (10), the air simultaneously enters the radial air charging tube (3) through the distributed air charging connector (9), and the air simultaneously enters the bottom middle annular air charging tube (4) and the bottom outer annular air charging tube (5) through the radial air charging tube (3); when the gas pressure in the radial gas-filled tube (3), the bottom middle annular gas-filled tube (4) and the bottom outer annular gas-filled tube (5) reaches the opening pressure of the gas inlet valve (11) between the bottom outer annular gas-filled tube (5) and the longitudinal gas-filled tube (2), the radial gas-filled tube (3), the bottom middle annular gas-filled tube (4) and the bottom outer annular gas-filled tube (5) are in the same plane.
4. A space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding as claimed in claim 3, wherein gas enters the longitudinal inflatable tube (2) from the bottom outer ring circumferential inflatable tube (5), the annular frames are sequentially filled from bottom to top, distributed unfolding of the annular frames is realized, each structural section reaches the same size, and the side surfaces of each layer of annular frames are synchronously unfolded; until the top annular inflation tube (7) is fully filled, so that the deviation of the central axis and the z axis of the space flexible unfolding structure is not more than 5% of the side length of the bottom outer ring annular inflation tube (5).
5. The space flexible unfolding structure capable of realizing two-dimensional stepwise unfolding according to claim 1, wherein a crest of a crease is formed along a connecting line of midpoints of each side of the bottom outer ring circumferential inflatable tube (5) and the inner top end of the radial inflatable tube (3), a trough of the crease is formed along the axis of the outer ring radial inflatable tube (3), folding is performed, the central column structure (8) is rotated, and other structures are driven to synchronously rotate in a laminating mode to the central column structure (8), so that the storage ratio of the volume of the folded outer envelope to the volume of the unfolded outer envelope is not more than 1:100.
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| CN108773502A (en) * | 2018-06-09 | 2018-11-09 | 哈尔滨工业大学 | Based on cylindrical surface or circular conical surface helix can in-orbit expansion hood |
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