CN104044755A - Curled and folded gas filled tube clamping and unfolding control device and control method thereof - Google Patents
Curled and folded gas filled tube clamping and unfolding control device and control method thereof Download PDFInfo
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- CN104044755A CN104044755A CN201410239557.0A CN201410239557A CN104044755A CN 104044755 A CN104044755 A CN 104044755A CN 201410239557 A CN201410239557 A CN 201410239557A CN 104044755 A CN104044755 A CN 104044755A
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Abstract
The invention discloses a curled and folded gas filled tube clamping and unfolding control device and a method thereof, aiming at realizing curled clamping fixation and unfolding control of the curled and folded gas filled tube. The curled and folded gas filled tube clamping and unfolding control device comprises a plug device, a rigid baffle plate and a flexible baffle plate. According to the curled and folded gas filled tube clamping and unfolding control device and method disclosed by the invention, the frictional resistance between the flexible baffle plate and the curled and folded gas filled tube is used for constraining the unfolding process of the curled and folded gas filled tube, and thus violent vibration and sway caused by non-constrained unfolding are avoided. Gas is filled to the free end of the curled and folded gas filled tube, and the gas filled tube which expanded under pressure can be gradually enfolded along the edge of the flexible baffle against the constraint of the frictional resistance after the pressure reaches a certain level. The curled and folded gas filled tube clamping and unfolding control device is simple in structure, little in occupied space, low in requirements on gas filling pressure, adjustable in frictional resistance and especially applicable to unfolding control of the thin-wall curled and folded gas filled tube; no Velcro fastener is needed to be additionally arranged on the outer wall of the tube.
Description
Technical field:
The present invention relates to a kind of curling foldable inflating pipe clamping deployment control apparatus and control method thereof, its clamping that is applied to spacecraft inflated spatial pipe launches to control.
Background technology:
Because the main composition of inflated spatial expanded structure is partly flexible thin-film material, so inflated spatial expanded structure has that quality is light, packaging volume is little, cost is low and launches reliability high, and can meeting spatial application etc. structural requirement.In space tasks, inflated spatial expanded structure application is more and more extensive.Curling foldable inflating pipe is a kind of simple, typical inflated spatial expanded structure, can be used for spacecraft inflated supporting pipe, deployable antenna and solar sail etc.Without the curling foldable inflating pipe of constraint, in expansion process, will produce violent swing and vibration, and even cause spacecraft unstability, so the control that imposes restriction is the key of its successful Application to expansion process.For curling foldable inflating pipe expansion problems, existing main way is by Velcro thread gluing, to control the gas replenishment process of curling foldable inflating pipe, need to be at the additional Velcro sticking belt of pipe outer wall, added mass, space requirement are higher, and be not easy to regulate to launch dumping force, and for the curling foldable inflating pipe of thin-walled, Velcro sticking belt cannot be used.
Summary of the invention:
The invention provides a kind of curling foldable inflating pipe clamping deployment control apparatus and control method thereof, the required installing space of this clamping deployment control apparatus is little, effect stability, and the clamping that is specially adapted to the curling foldable inflating pipe of elongated thin-walled launches to control.
The present invention adopts following technical scheme: a kind of curling foldable inflating pipe clamping deployment control apparatus, it comprises end cap, rigid baffle and flexible baffle, described end cap comprise left side plug and be installed on left side plug together with right side plug, described left side plug comprises the first matrix and the left side plug axle extending from a side of the first matrix, described right side plug comprises the second matrix and the right side plug axle extending from a side of the second matrix and be connected together with left side plug male thread, rigid baffle is installed successively from left to right between described the first matrix and the second matrix, flexible baffle, curling foldable inflating pipe, flexible baffle and rigid baffle.
Further, described flexible baffle comprises and is arranged at respectively two of curling foldable inflating pipe both sides.
Further, described rigid baffle comprises and is arranged at respectively two of flexible baffle both sides.
Further, on the plug axle of described left side, be recessed to form tapped bore with the right end of the first matrix phase.
Further, described right side plug axle is stepped, and it comprises the second portion that first that the diameter that extends from a side of the second matrix is larger and diameter are less than first.
Further, on the outside face of described second portion, be formed with the screw thread matching with tapped bore.
Further, the side diameter of described rigid baffle and flexible baffle is identical, and described rigid baffle and flexible baffle side diameter dimension equal 1.1～1.3 times of maximum folded thickness of described curling foldable inflating pipe.
Further, the left side plug axle of described end cap is identical with the diameter dimension of the first of right side plug axle, and equal the initial fold diameter of curling foldable inflating pipe, the first matrix is identical with the diameter dimension of the second matrix, and equals 1.4～1.6 times of initial fold diameter of curling foldable inflating pipe.
The present invention also adopts following technical scheme: a kind of control method of curling foldable inflating pipe clamping deployment control apparatus, it comprises the steps:
Step 1: by screw thread rotation, regulate the distance between left side the first matrix of plug and the second matrix of right side plug, and then suffered side direction gripping power while adjusting curling foldable inflating pipe clamping, the size of this power is calculated by following formula:
Wherein, E is the modulus of elasticity of flexible baffle, and A is flexible baffle area of thrust surface, D
0distance when flexible baffle is not out of shape between the first matrix and the second matrix, the distance after D flexible baffle distortion between the first matrix and the second matrix, d is flexible baffle thickness while not being out of shape;
Step 2: the free end at curling foldable inflating pipe connects source of the gas, appendix constantly expands, and the suffered constrained force of appendix is more and more less, after expanding into a certain degree, suffered side direction gripping power in the time of can overcoming curling foldable inflating pipe clamping completely, curling foldable inflating pipe launches gradually.
The present invention has following beneficial effect:
1). compare with existing Velcro sticking belt fixed form, the required installing space of the curling foldable inflating pipe of the present invention clamping deployment control apparatus is little, can save to a great extent the inner nervous space of spacecraft, the curling folding number of turns is more, the space of saving more;
2). the present invention utilizes the distortion restoring force of flexible baffle to retrain curling foldable inflating pipe, and which can provide the constrained force of continous-stable, makes foldable inflating pipe expansion process at the uniform velocity steady;
3). curling foldable inflating pipe is inflated to specific degrees (be appendix cross-sectional width be less than be not out of shape flexible baffle spacing), and the constraint providing in the present invention will be provided completely, and expansion process requires very low to inflation pressure;
4). than existing Velcro sticking belt fixed form, the curling foldable inflating pipe of the present invention clamping deployment control apparatus, the clamping that is specially adapted to the curling foldable inflating pipe of elongated thin-walled launches to control.
Accompanying drawing explanation:
Fig. 1 is the structural representation of the curling foldable inflating pipe of the present invention clamping deployment control apparatus.
Fig. 2 is the structural representation of end cap in curling foldable inflating pipe clamping deployment control apparatus shown in Fig. 1.
Wherein:
1-end cap; 2-rigid baffle; 3-flexible baffle; The curling foldable inflating pipe of 4-; 10-left side plug; 11-right side plug; 100-the first matrix; 101-left side plug axle; 102-tapped bore; 110-the second matrix; 111-right side plug axle; 112-screw thread; 1110-first; 1111-second portion.
The specific embodiment:
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Please refer to shown in Fig. 1 and Fig. 2, the curling foldable inflating pipe of the present invention clamping deployment control apparatus comprises end cap 1, rigid baffle 2, flexible baffle 3 and curling foldable inflating pipe 4.Wherein end cap 1 comprise left side plug 10 and be installed on left side plug 10 together with right side plug 11, wherein left side plug 10 comprises the first discoideus matrix 100 and the left side plug axle 101 extending from the first matrix 100 1 sides, and end relative with the first matrix 100 on left side plug axle 101 has been recessed to form tapped bore 102.Wherein right side plug 11 comprises the second discoideus matrix 110 and the stair-stepping right side plug axle 111 extending from the second matrix 110 1 sides, wherein stair-stepping right side plug axle 111 comprises the second portion 1111 that first 1110 that the diameter that extends from the second matrix 110 1 sides is larger and diameter are less than first, is formed with the screw thread 112 matching with tapped bore 102 on the outside face of the less second portion 1111 of diameter.Wherein the first matrix 100 is identical with the diameter of the second matrix 110, and left side plug axle 101 is identical with the diameter of the first 1110 of right side plug axle 111.The diameter of the first matrix 110 is greater than the diameter of left side plug axle 101 simultaneously, and the diameter of the second matrix 110 is greater than the diameter of right side plug Zhou111 first 1110.
The curling foldable inflating pipe of rigid baffle 2-flexible baffle 3-4-flexible baffle 3-and rigid baffle 2 are installed successively from left to right in the curling foldable inflating pipe of the present invention clamping deployment control apparatus between the first matrix 100 and the second matrix 110, wherein by the screw thread of right side plug 11 112 is rotated to the tapped bore 102 of left side plug 10, can be so that flexible baffle 3 reach certain variations degree, and then provide specific constrained force for curling foldable inflating pipe.
Wherein end cap 1 is applied to constrained force size on curling foldable inflating pipe 4 for controlling, and rigid baffle 2 is for providing support to flexible baffle 3, and the restoring force of flexible baffle 3 is the suffered constrained force sources of folded tube.Free end at curling foldable inflating pipe 4 connects source of the gas, appendix constantly expands, and the suffered constrained force of appendix is more and more less, after expanding into a certain degree, can overcome the constrained force that flexible baffle 3 provides completely, As time goes on appendix launches gradually.
Rigid baffle 2, flexible baffle 3 and end cap 1 side diameter dimension can determine according to the maximum folded thickness of curling foldable inflating pipe 4 and initial fold diameter.1.1～1.3 times of left and right that rigid baffle 2, flexible baffle 3 side diameter dimensions are got maximum folded thickness, the diameter dimension of the left side plug axle 101 of end cap 1 and the first 1110 of right side plug axle 111 can select to equal initial fold diameter, and the diameter dimension of the first matrix 100 and the second matrix 110 is 1.4～1.6 times of left and right of the diameter dimension of the left side plug axle 101 of end cap 1 and the first 1110 of right side plug axle 111.The first matrix 100 and the length between the second matrix 110 of end cap 1 can be according to rigid baffle 2 thickness d
2with flexible baffle 3 thickness d
3and the width of curling foldable inflating pipe 4 folded states (be π r, r is folded tube exterior radius) decision, the length variations scope of end cap (1) is got (2d
2+ 2d
3+ π r) (80%-100%).
In the curling foldable inflating pipe of the present invention clamping deployment control apparatus, left side plug 10 and right side plug 11 regulate distance between the plug matrix of both sides by screw thread rotation, and then suffered side direction gripping power while adjusting curling foldable inflating pipe clamping, the size of this power can be estimated by following formula:
Wherein, E is the modulus of elasticity of flexible baffle, and A is flexible baffle area of thrust surface, D
0distance when flexible baffle is not out of shape between the first matrix and the second matrix, the distance after D flexible baffle distortion between the first matrix and the second matrix, d is flexible baffle thickness while not being out of shape.During due to the friction drag between flexible baffle and curling foldable inflating pipe and curling foldable inflating pipe clamping, suffered side direction gripping power F is roughly proportional relation, suffered side direction gripping power F while therefore adjusting curling foldable inflating pipe clamping by said method, can realize the adjusting of the friction drag that need overcome when curling foldable inflating pipe launches.
Free end at curling foldable inflating pipe 4 connects source of the gas, and appendix constantly expands, when curling foldable inflating pipe is inflated to the constraint that to a certain degree can overcome this friction drag completely.Suppose that it is r that curling foldable inflating pipe is inflated rear its radius completely, the width of unaerated folded tube is half of tube wall girth, i.e. π r; And after curling foldable inflating pipe is inflated completely, its cross-sectional width is 2r.While adopting the curling foldable inflating pipe of the present invention clamping deployment control apparatus, flexible baffle medial surface spacing is set between 2r and π r conventionally.When curling foldable inflating pipe is inflated to a certain degree, its cross section maximum width will be less than flexible baffle medial surface spacing, and this section of involute tortuous folded appendix of time will no longer be subject to the friction drag constraint of flexible baffle.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make some improvement under the premise without departing from the principles of the invention, and these improvement also should be considered as protection scope of the present invention.
Claims (9)
1. a curling foldable inflating pipe clamping deployment control apparatus, it comprises end cap (1), rigid baffle (2) and flexible baffle (3), it is characterized in that: described end cap (1) comprise left side plug (10) and be installed on left side plug (10) together with right side plug (11), described left side plug (10) comprises the first matrix (100) and the left side plug axle (101) extending from a side of the first matrix (100), described right side plug (11) comprise the second matrix (110) and from a side of the second matrix (110), extend and be threadedly connected to left side plug axle (101) together with right side plug axle (111), between described the first matrix (100) and the second matrix (110), rigid baffle (2) is installed from left to right successively, flexible baffle (3), curling foldable inflating pipe (4), flexible baffle (3) and rigid baffle (2).
2. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 1, is characterized in that: described flexible baffle (2) comprises and is arranged at respectively two of curling foldable inflating pipe (4) both sides.
3. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 2, is characterized in that: described rigid baffle (3) comprises and is arranged at respectively two of flexible baffle (2) both sides.
4. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 3, is characterized in that: at the upper end relative with the first matrix (100) of described left side plug axle (101), be recessed to form tapped bore (102).
5. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 4, it is characterized in that: described right side plug axle (111) is stepped, it comprises the second portion (1111) that first (1110) that the diameter that extends from a side of the second matrix (110) is larger and diameter are less than first (1110).
6. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 5, is characterized in that: on the outside face of described second portion (1111), be formed with the screw thread (112) matching with tapped bore (102).
7. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 6, it is characterized in that: described rigid baffle (2) is identical with the side diameter of flexible baffle (3), described rigid baffle (2) and flexible baffle (3) side diameter dimension equal 1.1～1.3 times of maximum folded thickness of described curling foldable inflating pipe.
8. curling foldable inflating pipe clamping deployment control apparatus as claimed in claim 7, it is characterized in that: the left side plug axle (101) of described end cap (1) is identical with the diameter dimension of the first (1110) of right side plug axle (111), and equal the initial fold diameter of curling foldable inflating pipe, the first matrix (100) is identical with the diameter dimension of the second matrix (110), and equals 1.4～1.6 times of initial fold diameter of curling foldable inflating pipe.
9. a control method for the curling foldable inflating pipe clamping deployment control apparatus as described in any one in claim 1-8, is characterized in that: comprise the steps
Step 1: regulate first matrix (100) of left side plug (10) and the distance between second matrix (110) of right side plug (11) by screw thread rotation, and then suffered side direction gripping power while adjusting curling foldable inflating pipe clamping, the size of this power is calculated by following formula:
Wherein, E is the modulus of elasticity of flexible baffle, and A is flexible baffle area of thrust surface, D
0distance when flexible baffle is not out of shape between the first matrix (100) and the second matrix (110), the distance after D flexible baffle distortion between the first matrix (100) and the second matrix (110), d is flexible baffle thickness while not being out of shape;
Step 2: the free end at curling foldable inflating pipe connects source of the gas, appendix constantly expands, and the suffered constrained force of appendix is more and more less, after expanding into a certain degree, suffered side direction gripping power in the time of can overcoming curling foldable inflating pipe clamping completely, curling foldable inflating pipe launches gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410239557.0A CN104044755B (en) | 2014-05-30 | 2014-05-30 | A kind of curling foldable inflating pipe clamping deployment control apparatus and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410239557.0A CN104044755B (en) | 2014-05-30 | 2014-05-30 | A kind of curling foldable inflating pipe clamping deployment control apparatus and control method thereof |
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| CN104044755B CN104044755B (en) | 2016-05-18 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104691783A (en) * | 2015-03-28 | 2015-06-10 | 哈尔滨工业大学 | Inflating extending arm capable of flattening and rolling |
| CN104691785A (en) * | 2015-03-28 | 2015-06-10 | 哈尔滨工业大学 | Inflating extending arm capable of automatically rolling |
| CN106159409A (en) * | 2016-07-19 | 2016-11-23 | 中国科学院国家空间科学中心 | A kind of space thin-walled tubular extending arm expanding unit |
| CN106672270A (en) * | 2016-11-16 | 2017-05-17 | 上海卫星工程研究所 | Lightweight storage barrel for spatial reelable and deployable structure |
| CN107323687A (en) * | 2017-06-22 | 2017-11-07 | 中国科学院国家空间科学中心 | A kind of spaceborne flexible microlight-type folding-type carbon fiber boom |
| CN112591145A (en) * | 2021-01-14 | 2021-04-02 | 哈尔滨工业大学 | Flexible film inflatable cylinder with reinforcing sheath and rectangular parallelepiped containing and folding method thereof |
| CN112758357A (en) * | 2021-01-14 | 2021-05-07 | 哈尔滨工业大学 | Flexible film inflatable sphere and multidirectional folding method for accommodating cuboid thereof |
| CN114084384A (en) * | 2021-11-26 | 2022-02-25 | 哈尔滨工业大学 | Winding type inflatable telescopic arm capable of working in large range in long distance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2516585A1 (en) * | 1975-04-16 | 1976-10-28 | Siemens Ag | Inflating device for collapsible balloon tube - has tube winding roller with pressure channel to introduce air |
| CN101353087A (en) * | 2008-08-27 | 2009-01-28 | 哈尔滨工业大学 | On-orbit inflatable deployment and stiffened protection system against space fragment and micrometeoroid |
| CN202355752U (en) * | 2011-12-06 | 2012-08-01 | 西安新竹实业有限责任公司 | Fire-fighting hose reel |
| CN203294959U (en) * | 2013-06-17 | 2013-11-20 | 贵州西牛王印务有限公司 | Positioning device for assembling web on mandrel |
| CN103419955A (en) * | 2013-08-28 | 2013-12-04 | 深圳市沃尔核材股份有限公司 | Method and equipment for packaging pipe material |
| CN103817237A (en) * | 2014-02-18 | 2014-05-28 | 哈尔滨工业大学 | Mould for roll folding of spatial inflation controlled unfolding type supporting arm |
-
2014
- 2014-05-30 CN CN201410239557.0A patent/CN104044755B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2516585A1 (en) * | 1975-04-16 | 1976-10-28 | Siemens Ag | Inflating device for collapsible balloon tube - has tube winding roller with pressure channel to introduce air |
| CN101353087A (en) * | 2008-08-27 | 2009-01-28 | 哈尔滨工业大学 | On-orbit inflatable deployment and stiffened protection system against space fragment and micrometeoroid |
| CN202355752U (en) * | 2011-12-06 | 2012-08-01 | 西安新竹实业有限责任公司 | Fire-fighting hose reel |
| CN203294959U (en) * | 2013-06-17 | 2013-11-20 | 贵州西牛王印务有限公司 | Positioning device for assembling web on mandrel |
| CN103419955A (en) * | 2013-08-28 | 2013-12-04 | 深圳市沃尔核材股份有限公司 | Method and equipment for packaging pipe material |
| CN103817237A (en) * | 2014-02-18 | 2014-05-28 | 哈尔滨工业大学 | Mould for roll folding of spatial inflation controlled unfolding type supporting arm |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104691783A (en) * | 2015-03-28 | 2015-06-10 | 哈尔滨工业大学 | Inflating extending arm capable of flattening and rolling |
| CN104691785A (en) * | 2015-03-28 | 2015-06-10 | 哈尔滨工业大学 | Inflating extending arm capable of automatically rolling |
| CN104691783B (en) * | 2015-03-28 | 2016-09-14 | 哈尔滨工业大学 | A kind of inflation valve for spreading arm that can automatically flatten curling |
| CN106159409A (en) * | 2016-07-19 | 2016-11-23 | 中国科学院国家空间科学中心 | A kind of space thin-walled tubular extending arm expanding unit |
| CN106159409B (en) * | 2016-07-19 | 2019-01-22 | 中国科学院国家空间科学中心 | A kind of space thin-walled tubular extending arm expanding unit |
| CN106672270A (en) * | 2016-11-16 | 2017-05-17 | 上海卫星工程研究所 | Lightweight storage barrel for spatial reelable and deployable structure |
| CN107323687A (en) * | 2017-06-22 | 2017-11-07 | 中国科学院国家空间科学中心 | A kind of spaceborne flexible microlight-type folding-type carbon fiber boom |
| CN112591145A (en) * | 2021-01-14 | 2021-04-02 | 哈尔滨工业大学 | Flexible film inflatable cylinder with reinforcing sheath and rectangular parallelepiped containing and folding method thereof |
| CN112758357A (en) * | 2021-01-14 | 2021-05-07 | 哈尔滨工业大学 | Flexible film inflatable sphere and multidirectional folding method for accommodating cuboid thereof |
| CN112591145B (en) * | 2021-01-14 | 2022-06-17 | 哈尔滨工业大学 | Flexible film inflatable cylinder with reinforcing sheath and rectangular parallelepiped containing and folding method thereof |
| CN114084384A (en) * | 2021-11-26 | 2022-02-25 | 哈尔滨工业大学 | Winding type inflatable telescopic arm capable of working in large range in long distance |
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