CN107238330B - Rotary umbrella - Google Patents
Rotary umbrella Download PDFInfo
- Publication number
- CN107238330B CN107238330B CN201710571304.7A CN201710571304A CN107238330B CN 107238330 B CN107238330 B CN 107238330B CN 201710571304 A CN201710571304 A CN 201710571304A CN 107238330 B CN107238330 B CN 107238330B
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- umbrella
- canopy
- rotary
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- girts
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- 238000009423 ventilation Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 6
- 238000009958 sewing Methods 0.000 claims description 6
- 238000009987 spinning Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 abstract description 21
- 210000001503 joint Anatomy 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
- F42B10/56—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding of parachute or paraglider type
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Walking Sticks, Umbrellas, And Fans (AREA)
- Toys (AREA)
Abstract
The invention discloses a rotary umbrella, which comprises a top frame, a plurality of umbrella fabric surrounding frames and umbrella ropes, wherein the umbrella fabric surrounding frames are of a non-isosceles trapezoid block structure, the umbrella fabric surrounding frames are respectively spliced and surrounded into an integral annular umbrella fabric in a butt joint manner by one trapezoid side edge, the two ends of the trapezoid side edge of each umbrella fabric surrounding frame are connected in an up-down pressing joint manner, a gap is formed between the upper umbrella fabric and the lower umbrella fabric in the middle part and is used as an air inlet/air outlet, the lengths of the upper side and the lower side of the umbrella fabric surrounding frames are different, so that the rotary umbrella can rotate through reaction moment generated when air flow flowing into the umbrella fabric through an air inlet is discharged from the air outlet when in the air descending process; the umbrella ropes are multiple, one end of each umbrella rope is connected with the bottom end of the umbrella cover, and the other ends are converged together and connected with the torsion-preventing ring; the top of the umbrella surface is provided with a top frame which is arranged at the center of the top of the umbrella surface. The rotary umbrella can effectively improve the structural ventilation of the rotary umbrella, improve the umbrella opening speed and reliability of the rotary umbrella, and has simple process and lower cost.
Description
Technical Field
The invention belongs to the technical field of drogue parachutes, and particularly relates to a rotating parachute which is particularly suitable for deceleration gesture adjustment and high-altitude steady-state scanning of bullets.
Background
In the weapon or aviation field, intelligent weapon ammunition mostly needs to realize speed reduction, gesture adjustment or rotation driving through a parachute, and a rotating parachute is a typical device for realizing weapon ammunition gesture reduction or rotation driving.
The rotary umbrella is generally composed of irregular gores and umbrella ropes, the two ends of the gores are spliced together, the left and right edges of the gores are sewn in an overlapping mode, and the reactive moment generated by the exhaust gas in the exhaust port when the rotary umbrella works is realized through the asymmetric structures such as the shape of the gores or the opening defense lines on the gores, the length difference of the umbrella ropes and the like, so that the gores rotate around the central shaft. When the object to be decelerated reaches a preset height and speed, the rotating umbrella is opened, and the rotating umbrella decelerates the object to be decelerated and provides a stable scanning platform so as to drive a bullet and the like to realize steady scanning on a ground target.
Patent document CN203555267U discloses a vortex sail type rotary umbrella, which comprises a plurality of umbrellas, a circumferential reinforcing belt, an umbrella rope and a central rope, wherein the umbrellas are fixed on the circumferential reinforcing belt and spliced into a circumferential umbrella cover, the center of the umbrella cover is provided with a ventilation opening, and a gap is formed between two adjacent umbrellas, and the gap forms an air inlet and an air outlet. The umbrella canopy is in a trapezoid shape which is not isosceles, and the umbrella rope is connected with the outer bottom edge of the umbrella canopy. The circumference reinforcing belt is also provided with a plurality of radial reinforcing belts, the intersection points of the radial reinforcing belts are converged at the center of the umbrella surface, one end of the central rope is fixed at the intersection point of the radial reinforcing belts, and the other end of the central rope is connected with the gathered umbrella rope. The rotary umbrella can provide a deceleration function for a suspended object at the lower end of the rotary umbrella, and can also drive the suspended object at the lower end of the rotary umbrella to rotate at a high speed so as to realize the scanning of a target
However, the rotary umbrella with the structure has large ventilation quantity and low umbrella opening speed, so that the reliability of opening the rotary umbrella is lower, the usability is not high, and the rotary umbrella cannot be suitable for practical demands.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides the rotary umbrella, which can effectively improve the structural ventilation of the rotary umbrella through the optimized structural improvement design, improve the umbrella opening speed and reliability of the rotary umbrella, and has simple process and lower cost.
In order to achieve the above object, according to the present invention, there is provided a rotary umbrella for decelerating, adjusting the posture of a bullet and/or rotating it, characterized in that the rotary umbrella comprises a top frame, a plurality of canopy surrounding frames and a plurality of ropes, wherein,
the umbrella canopy is of a non-isosceles trapezoid block structure, a plurality of umbrella canopy girts are respectively spliced in turn by one trapezoid side edge of the umbrella canopy girts to form an integrally annular umbrella surface, the upper end and the lower end of the trapezoid side edge of each umbrella canopy is connected by pressing seams, gaps are arranged between the upper umbrella canopy and the lower umbrella canopy in the middle part to serve as air inlet/air outlet, the lengths of the upper side and the lower side of each umbrella canopy girt are different, and therefore the rotary umbrella can rotate through reaction moment generated when air flow flowing into the umbrella canopy through an air inlet is discharged from the air outlet when descending in the air;
the umbrella ropes are multiple, one end of each umbrella rope is connected with the bottom end of the umbrella cover, and the other ends of the umbrella ropes are connected together in a converging way and are connected with the torsion-preventing ring;
and the top of the umbrella surface is provided with a top frame which is arranged in the center of the top of the umbrella surface, so that the top of the umbrella surface can be reduced to be breathable in the air inlet and exhaust process, and the umbrella opening efficiency and speed are improved.
As a further improvement of the invention, the top web is a wafer, and the material adopts a micro-ventilation or airtight special spinning material.
As a further improvement of the invention, the top frame is spliced with the upper end of each umbrella fabric, namely, the umbrella fabric is spliced around the top frame in a circle, and a gas-proof structure is formed in the middle of the umbrella top.
As a further improvement of the invention, the gore is overlapped with the gore edge and spliced by sewing.
As a further improvement of the invention, a central rope is also included, one end of which is connected to the centre of the top web and the other end is connected to the torsion-preventing ring, the rotation of the canopy being a rotation around the central rope.
As a further improvement of the invention, the gore is preferably twelve.
As a further development of the invention, the said cords are preferably the same number as the gores, and the connection points with the bottom end of the canopy are located where the gores are spliced to each other.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
(1) In the rotary umbrella, the umbrella canopy girts are mutually built through the trapezoid side edges, wherein the two ends of the lap joint part are sewed, and the middle part is used as an air inlet/air outlet, so that the structure can realize that the umbrella canopy can be rotated by the reaction moment generated when the air flow flowing into the umbrella canopy through the air inlet is discharged from the air outlet when the umbrella descends in the air, and the umbrella body can be opened efficiently and stably;
(2) In the rotary umbrella, the top frame is arranged at the upper part of each canopy surrounding frame and is connected with the canopy surrounding frame in a sewing way, so that gaps are not formed between the canopy surrounding frame and the top frame, an airtight structure is formed in the middle of the top frame, and when the umbrella is opened, air flow cannot flow out from the middle position in the umbrella, so that certain air pressure is easily accumulated, and the pressure difference is formed between the inside and the outside of the surface of the canopy, so that the umbrella can be quickly opened;
(3) The rotary umbrella has the advantages of simple structure, small air permeability, high umbrella opening speed, high umbrella opening reliability and strong universality, can be widely applied to modern intelligent weapon ammunition, is simpler than the processing technology of vortex sail type rotary umbrellas, has low manufacturing cost, and particularly has the advantages of greatly reducing the processing and production difficulty because of overlapping and overlapping seams when sewing seams between two gores, and has no need of considering the gap precision.
Drawings
FIG. 1 is a schematic view of a rotary umbrella structure according to one embodiment of the present invention;
FIG. 2 is an enlarged detail view of the rotary umbrella of FIG. 1;
like reference numerals denote like technical features throughout the drawings, in particular: 1-top frame, 2-canopy surrounding frame, 3-side umbrella rope, 4-center rope, 5-torsion-proof ring and 6-bullet.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
FIG. 1 is a schematic view of a rotary umbrella according to one embodiment of the present invention. As shown in fig. 1, the rotary umbrella of the present embodiment includes a top frame 1, a plurality of gores 2, and a plurality of cords 3. The rotary umbrella is used for decelerating and adjusting the posture of intelligent weapon ammunition such as a bullet and/or driving the intelligent weapon ammunition to rotate so as to realize the scanning of a target.
As shown in fig. 1, canopy girth 2 is used to enclose a rotating canopy, which is formed by mutual stitching. In particular, the gores preferably have a non-isosceles trapezoid block structure, i.e. different lengths on both sides. The trapezoid side edges of the multiple canopy surrounding webs are used as adjacent edges, and the trapezoid side edges are butted and spliced to form the umbrella cover which is in an annular shape as a whole. The top end of the umbrella surface is surrounded by the upper bottom edges of the trapezoids, and the bottom end is surrounded by the lower bottom edges of the trapezoids.
When the umbrella cover is formed, one side edge of one umbrella gore 2 is connected with one side edge of the adjacent other umbrella gore 2, and the two side edges are overlapped after overlapping a certain width, for example, the two side edges can be connected in a sewing mode or in other modes such as bonding.
And gaps are formed between the two mutually connected side edges to serve as air inlet/air outlet, and the length of the two sides of each canopy girth is different, so that when the rotary umbrella descends in the air, a certain reaction moment is generated when air flow flowing into the canopy through the air inlet is discharged from the air outlet, and the canopy can be rotated.
Of course, the shape of the gore girth 2 is not limited to trapezoids, and other shapes can be spliced, so long as the length of the splicing surfaces is ensured to be different, the air inlet and the air outlet which enable the gore to rotate can be formed, and corresponding rotation action moment can be generated.
The number of cords 3 is generally a plurality, preferably the same as the number of gores 2, although the number may be different. One end of each umbrella rope 3 is connected with the bottom end of the umbrella cover, and the other ends are connected together in a converging way and are preferably connected with the torsion-proof ring 5. The anti-torsion ring 5 mainly plays a role in preventing the umbrella rope from being twisted when the umbrella is opened, so that the umbrella rope is smooth.
Preferably, the device also comprises a central rope 4, one end of which is arranged at the top center of the umbrella surface, the other end of which is fixedly connected with the torsion-proof ring 5, and the rotation of the umbrella surface is the choice of winding the central rope 4, thereby driving the bullet below to adjust the gesture or rotate and scan.
The top of the umbrella surface is provided with the top frame 1 which is arranged at the center of the top of the umbrella surface, so that the top of the umbrella surface is breathable in the air inlet and exhaust process, and the umbrella opening efficiency and speed are improved.
Specifically, as shown in fig. 2, the top web 1 is disposed on top of the umbrella cover, and is preferably circular, i.e. the top web is a disc, and the material of the top web is a micro-ventilation or airtight special spinning material. The top panel is connected with the upper end face seam of each canopy girth panel, for example, by bonding, sewing or other modes.
According to the umbrella top structure, the middle part is in an airtight structure form, and when the umbrella is opened, air flow cannot flow out from the middle position in the umbrella, so that certain air pressure is easily accumulated, and the pressure difference is formed between the inside and the outside of the surface of the umbrella cover, so that the umbrella can be opened quickly; if the middle part is a breathable structure, air flows easily from the top of the umbrella, a pressure difference cannot be formed, and the canopy is not easy to open, so that the reliability of opening the umbrella is not ensured.
In a preferred embodiment, the number of gores 2 is preferably twelve, with the twelve gores 2 being sewn around a central top in a circular plane, with top 1 being sewn to the top of the gores and the opposite side of the center being connected to a central cord. The left and right edges of the gores 2 are overlapped and sewn to form an air inlet and outlet, the upper ends of the air inlet and outlet are connected with the central top web 1, and the twelve gores 2 are sewn around the central top web to form a circular plane shape. The upper ends of the umbrella ropes 3 are sewn between every two umbrella fabric girts 2, the lower ends of the two side umbrella ropes 3 are connected together to form one through the outside of the anti-torsion ring 5, the upper ends of the central ropes are connected to the connecting belt below the center of the top fabric 1, the lower ends of the central ropes are divided into three branch forks, each branch fork is connected with the lower ends of the two side umbrella ropes, and one branch fork is connected to every other two side umbrella ropes.
The extended surface type rotary umbrella is characterized in that a top frame, an umbrella fabric surrounding frame and umbrella ropes are adopted, twelve umbrella fabric surrounding frame seams with non-isosceles trapezoid block structures are overlapped with a round top frame in the middle to form a three-dimensional skirt-shaped rotary umbrella, two umbrella fabric surrounding frame ends are connected, the umbrella fabric surrounding frame and the umbrella fabric surrounding frame edges are overlapped and sewn, an air inlet and an air outlet are formed through different lengths of the upper side and the lower side of the umbrella fabric surrounding frame, and twelve side umbrella ropes and a central rope are also arranged. When the rotating umbrella reaches the preset umbrella opening speed and height, the rotating umbrella opening program is started, the rotating umbrella is pulled out from the umbrella bag, and is opened, inflated and fully opened, and simultaneously, the suspended object at the lower end of the rotating umbrella is decelerated, and the aim of scanning the lower object is achieved.
Compared with a common rotary umbrella, the extended surface type rotary umbrella provided by the invention has the advantages that one more circular top frame 1 is arranged, gaps are not reserved between every two umbrella fabric surrounding frames 2, the umbrella fabric surrounding frames 2 form a cylindrical skirt-shaped structure, the structural ventilation of the rotary umbrella is smaller, and the resistance coefficient is larger.
The resistance coefficient of the structure of the rotary umbrella is relatively large, generally can reach about 1.2, and the resistance characteristic is larger under the condition of the same area. In some cases, where it is desirable to achieve the same resistance characteristics, a smaller area umbrella may be used with the rotating umbrella of the present invention, saving space and cost. In addition, the invention has the remarkable characteristic that the umbrella can be reliably opened under the condition of high speed, the umbrella opening speed is limited when a common rotating umbrella is used, and the umbrella is required to be opened at a lower speed, but the invention is not limited by the speed.
The asymmetry of the gores of the rotary umbrella of the present invention causes the reactive moment created by the air flow into the gores as they are discharged from the exhaust ports to rotate the gores about the central cord as the rotary umbrella descends in the air. The middle part of the umbrella canopy is provided with a circular top amplitude, so that the structure ventilation volume of the rotary umbrella is small, and the umbrella is easy to open and has high speed.
In addition, the processing technology of the extended surface rotary umbrella is simpler than that of a vortex sail type rotary umbrella, the manufacturing cost is low, and especially when gaps between every two gores are sewn, the processing precision requirement of the vortex sail type rotary umbrella is high, otherwise, the stability of the umbrella is poor, and the extended surface rotary umbrella is a lap joint and overlapping gap, so that the problem of gap precision is not needed to be considered, and the extended surface rotary umbrella is a great advantage.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (2)
1. A rotary umbrella for decelerating and adjusting the posture of bullets and/or driving the bullets to rotate is characterized by comprising a top frame, a plurality of canopy surrounding frames, umbrella ropes and a center rope, wherein,
the umbrella canopy is in a non-isosceles trapezoid block structure, a plurality of umbrella canopy girts are respectively spliced in turn by one trapezoid side edge of the umbrella canopy girts to form an integrally annular umbrella surface, the edges of the umbrella canopy girts are overlapped and are connected by upper and lower pressing seams at two ends of the trapezoid side edges of the umbrella canopy girts, a gap is formed between the upper and lower umbrella canopy girts in the middle part to serve as an air inlet/air outlet, the lengths of the upper and lower umbrella canopy girts are different, and therefore, when the rotary umbrella descends in the air, the rotary umbrella can rotate through reaction moment generated when air flow flowing into the umbrella canopy through the air inlet is discharged from the air outlet;
the number of the umbrella ropes is the same as that of the umbrella gores, one end of each umbrella rope is positioned at the position where the two adjacent umbrella gores are spliced with each other, and the other ends of the umbrella ropes are spliced together and connected with the torsion-preventing ring;
the top of the umbrella cover is provided with a top frame, the top frame is a circular sheet, the circular sheet is made of a special spinning material with micro ventilation or air impermeability, the special spinning material is arranged in the center of the top of the umbrella cover, and the top frame is fixedly connected with the upper ends of the surrounding frame of each umbrella cover in a bonding or sewing mode, so that the top of the umbrella cover can be reduced in ventilation in the air inlet and exhaust process, and the umbrella opening efficiency and speed are improved;
the top end of the center rope is connected to the connecting belt below the center of the top frame, and the bottom end of the center rope is fixedly connected with the torsion preventing ring.
2. A rotary umbrella as defined in claim 1 wherein said canopy is twelve pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571304.7A CN107238330B (en) | 2017-07-13 | 2017-07-13 | Rotary umbrella |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571304.7A CN107238330B (en) | 2017-07-13 | 2017-07-13 | Rotary umbrella |
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| Publication Number | Publication Date |
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| CN107238330A CN107238330A (en) | 2017-10-10 |
| CN107238330B true CN107238330B (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710571304.7A Active CN107238330B (en) | 2017-07-13 | 2017-07-13 | Rotary umbrella |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109737827B (en) * | 2019-02-25 | 2024-04-19 | 北京星际荣耀空间科技股份有限公司 | Pneumatic speed reducer and sub-level structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB516292A (en) * | 1937-06-29 | 1939-12-29 | Axel Raoul Thoernblad | Improvements in or relating to parachutes |
| US3931945A (en) * | 1972-02-11 | 1976-01-13 | Ilc-Steinthal, Inc. | Rotating parachute |
| US4844384A (en) * | 1987-05-15 | 1989-07-04 | Barish David T | Rotating parachute |
| US5174527A (en) * | 1990-09-10 | 1992-12-29 | Alliant Techsystems Inc. | Annular spinning parachute |
| JP3079517B1 (en) * | 1999-04-01 | 2000-08-21 | 防衛庁技術研究本部長 | Rotating parachute |
| CN203555267U (en) * | 2013-11-15 | 2014-04-23 | 航宇救生装备有限公司 | Vortex-sail-type rotating parachute |
| CN207095416U (en) * | 2017-07-13 | 2018-03-13 | 襄阳宏伟航空器有限责任公司 | A kind of rotating parachute |
-
2017
- 2017-07-13 CN CN201710571304.7A patent/CN107238330B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB516292A (en) * | 1937-06-29 | 1939-12-29 | Axel Raoul Thoernblad | Improvements in or relating to parachutes |
| US3931945A (en) * | 1972-02-11 | 1976-01-13 | Ilc-Steinthal, Inc. | Rotating parachute |
| US4844384A (en) * | 1987-05-15 | 1989-07-04 | Barish David T | Rotating parachute |
| US5174527A (en) * | 1990-09-10 | 1992-12-29 | Alliant Techsystems Inc. | Annular spinning parachute |
| JP3079517B1 (en) * | 1999-04-01 | 2000-08-21 | 防衛庁技術研究本部長 | Rotating parachute |
| CN203555267U (en) * | 2013-11-15 | 2014-04-23 | 航宇救生装备有限公司 | Vortex-sail-type rotating parachute |
| CN207095416U (en) * | 2017-07-13 | 2018-03-13 | 襄阳宏伟航空器有限责任公司 | A kind of rotating parachute |
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| CN107238330A (en) | 2017-10-10 |
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