CN115355771A - Redundancy-unlocking-function-redundancy-free expansion pipe separation device and method - Google Patents
Redundancy-unlocking-function-redundancy-free expansion pipe separation device and method Download PDFInfo
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- CN115355771A CN115355771A CN202210910165.7A CN202210910165A CN115355771A CN 115355771 A CN115355771 A CN 115355771A CN 202210910165 A CN202210910165 A CN 202210910165A CN 115355771 A CN115355771 A CN 115355771A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
- F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
- F42B15/38—Ring-shaped explosive elements for the separation of rocket parts
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Abstract
The invention discloses a redundant-unlocking-function-redundancy-free expansion pipe separation device, which comprises an explosive cable, a filler, a flat pipe, two separation plates and an end frame, wherein the two separation plates are provided with weakening grooves and arm plates for placing the flat pipe, the two flat pipes are respectively arranged between the arm plates and the end frame, the explosive cable is positioned in the flat pipe, and the filler is filled between the explosive cable and the flat pipe. The invention comprises a separating surface and two groups of flat pipe assemblies, and the structure separation can be realized when any one group of flat pipe assemblies works. The expansion pipe separating device with redundant functions is beneficial to improving the reliability of the expansion pipe separating device, and simultaneously, the flat pipes after work are tied down, so that no redundant materials are generated.
Description
Technical Field
The invention belongs to the field of space navigation, relates to a linear separation device, and particularly relates to a separation device and a separation method for a redundancy-free expansion pipe, which are used for connection and separation between carrier rocket stages and between a rocket and a payload.
Background
The separating device can be divided into point type separating and linear type separating according to the structure form. The point separation adopts a series structure of a plurality of explosive bolts as a separation device, the separation device is widely used and examined in China, the technical level is quite mature, the reliability of a single product is greatly improved, but when the separation device is applied to an interstage separation part, a plurality of products are required to work together, and the reliability is lower. The linear separation device greatly improves the reliability and the synchronism of separation and changes the stress environment of the separation section. At present, the linear separation device is widely used, the design and manufacturing level of the linear separation device is examined through previous successful flight tests, the linear separation device has the advantages of strong bearing capacity, high connection rigidity and the like, and the linear separation device is a development trend in design and model selection at home and abroad.
The existing expansion pipe separating device only has one set of flat pipe components, if the flat pipes do not normally expand, the separating plate cannot be normally disconnected, and the separation fails, so that the design of the expansion pipe separating device with a redundant function is necessary.
Disclosure of Invention
The invention aims to overcome the defects and provide the expansion pipe separating device without the surplus objects, which has the redundant unlocking function, so that the problem of poor reliability of the conventional expansion pipe separating device is solved.
In order to achieve the above purpose, the invention provides the following technical scheme:
a redundant nothing expansion pipe separator of unblock function redundancy, including explosive cable, filler, flat tube, separation plate group and end frame;
the number of the separation plate groups is more than or equal to 1, and each separation plate group comprises 2 separation plates which are oppositely arranged;
one surface of the separating plate is provided with a weakening groove, the other surface of the separating plate is provided with a first arm plate and a second arm plate, and the first arm plate and the second arm plate are respectively positioned at two sides of the weakening groove;
the separating plate is fixedly connected with the end frame, the end frame comprises an upper end frame and a lower end frame, the upper end frame and the lower end frame are respectively connected with adjacent sections of the carrier rocket, or the upper end frame and the lower end frame are respectively connected with the payload and the carrier rocket body;
the number of the flat tubes is 2, the flat tubes are respectively marked as a first flat tube and a second flat tube, a cavity for accommodating the first flat tube is formed between a first arm plate and an upper end frame of 2 oppositely arranged separation plates, and a cavity for accommodating the second flat tube is formed between a second arm plate and a lower end frame of the 2 oppositely arranged separation plates;
the explosive cable is positioned inside the flat tube, and filler is filled between the explosive cable and the flat tube.
Furthermore, the surface of the score separation plate provided with the weakening grooves is a first surface, the other surface of the score separation plate is a second surface, and the second surface of the separation plate is provided with a first crescent alveolus and a second crescent alveolus which are sunken towards the first surface;
and a cavity for accommodating the first flat tube is formed among the first arm plate and the lower edge of the upper end frame of the 2 separating plates and the first crescent tooth grooves of the 2 separating plates, and a cavity for accommodating the second flat tube is formed among the second arm plate and the upper edge of the lower end frame of the 2 separating plates and the second crescent tooth grooves of the 2 separating plates.
Furthermore, on the second surface of the separation plate, the lower end of the first crescent moon groove is not lower than the arrangement position of the first arm plate, and the distance between the upper end of the first crescent moon groove and the projection position of the lower edge of the upper end frame on the second surface is less than or equal to 2mm; the upper end of the second February tooth socket is not higher than the setting position of the second arm plate, and the distance between the lower end of the second February tooth socket and the projection position of the upper edge of the lower end frame on the second surface is less than or equal to 2mm.
Further, the depth of the crescent groove is half of the thickness of the separating plate.
Further, the explosive cable is positioned in the center of the flat tube;
the first end of first armboard and the first end of second armboard are connected respectively in the second surface of separator plate, and when 2 separator plates set up relatively, form the gap that just faces first flat pipe between the second end of 2 first armboards, form the gap that just faces the second flat pipe between the second end of 2 second armboards.
Further, the first arm plate and the second arm plate of the separation plate have the same height in the direction perpendicular to the second surface of the separation plate, which is marked as l a The major axis of the flat tube is denoted by b Satisfies the following conditions:
0.43l b ≤l a ≤0.47l b 。
furthermore, chamfers are arranged at the second end of the first arm plate and the second end of the second arm plate;
the angle of the chamfer is 30-50 degrees.
Further, when the number of the groups of the separation plate groups is more than 1, dividing 2 separation plates included in each group of separation plate groups into two types, splicing the first type separation plates in each group of separation plate groups, and splicing the second type separation plates in each group of separation plate groups;
the long axis direction of the flat tube is vertical to the surface of the separating plate;
the separating plate is of an arc plate structure, and the weakening grooves are arc grooves arranged along the circumferential direction of the separating plate; or the separating plate is of a flat plate structure, and the weakening grooves are linear grooves;
the separating plate is fixedly connected with the end frame through bolts.
Furthermore, the combination of the explosive cable, the filler and the flat tube is used as a flat tube assembly, and the energy output to the separation plate by the flat tube assembly is not less than the energy required by the fracture of the separation plate at the weakening groove;
the output energy of the flat tube assembly was tested by the following method:
placing the flat pipe assembly in a testing device with one side made of aluminum alloy and the other side made of aluminum honeycomb;
detonating an explosive cord to enable the flat pipe assembly to do work on the aluminum honeycomb on one side, and measuring the compression l of the aluminum honeycomb;
calculating the energy E output by the flat tube assembly to the aluminum honeycomb S ＝σ s· l, where σ s Is the yield strength of the aluminum honeycomb;
will E S Equivalent to the energy output by the flat tube assembly to the separator plate.
A separation method of redundancy-unlocking-function non-redundancy expansion pipes is realized by adopting the redundancy-unlocking-function non-redundancy expansion pipe separation device, and comprises the following steps:
when the explosive cable in at least one flat tube is ignited, the separating plate is broken at the weakening groove, and the first flat tube and the second flat tube are respectively retained in a cavity formed between the first arm plate and the upper end frame and a cavity formed between the second arm plate and the lower end frame.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention innovatively provides a function-redundant expansion pipe separating device which comprises a separating surface and two groups of flat pipe assemblies, wherein any one group of flat pipe assemblies can realize structural separation during working, so that the reliability of the expansion pipe separating device is improved;
(2) The flat tube is arranged in a cavity formed by the arm plate and the end frame of the separating plate, the flat tube can be tied after the separating plate is broken, no excess is generated, and a tying device does not need to be designed independently;
(3) According to the invention, the crescent groove is arranged on the separating plate, so that the stress on the separating plate is reasonably distributed, namely, under the expansion action of the flat tube, the weakened groove has larger stress, and other parts have smaller stress, so that the reliability of the device is further improved;
(4) The invention utilizes the aluminum honeycomb energy absorption to carry out quantitative equivalence on the energy output of the flat tube, is favorable for optimizing the material and the structure of the flat tube component, simplifies the design method of the device and improves the design efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a redundant expansion pipe separation device without redundancies and with redundant unlocking functions, according to the present invention;
FIG. 2 is a schematic diagram of a separator plate structure according to the present invention;
FIG. 3 is a schematic view of a quantitative evaluation method for the output energy of the flat tube assembly according to the present invention;
wherein, 1-explosive cord, 2-filler, 3-flat tube, 4-separation plate, 5-end frame and 6-bolt;
41-weakening groove, 42-arm plate and 43-crescent groove.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
As shown in fig. 1 to 3, the redundant expansion pipe separating device without unlocking function of the present invention includes a separating plane and two sets of flat pipe assemblies, and any one set of flat pipe assemblies can realize structural separation. Specifically, the separation device comprises an explosive cable 1, a filler 2, flat tubes 3, a separation plate group consisting of two oppositely arranged separation plates 4, an end frame 5 and an optional bolt 6.
Optionally, the explosive cord 1 is a lead sheath explosive cord.
Optionally, the number of groups of the separation plate groups is more than or equal to 1; specifically, the present invention may only include 2 separation plates arranged oppositely, or may use multiple separation plate groups to perform splicing combination under the condition of a large diameter of the launch vehicle, for example, each separation plate group includes two separation plates with arc-shaped plate structures, and after splicing multiple groups of separation plates, an overall annular separation plate can be obtained, at this time, 2 separation plates in each separation plate group are divided into two types, one type of separation plate in each separation plate group is spliced to form an annular inner separation plate, and the other type of separation plate is spliced to form an annular outer separation plate.
Optionally, as shown in fig. 2, the separating plate 4 includes a weakening groove 41 and two arm plates 42, the arm plates 42 are used for fixing the flat tube 3, a crescent groove 43 is formed in the vertical side of the separating plate 4, the crescent groove 43 is an optimized structure, and it can be ensured that the stress of the weakening groove is maximum and the stress of other parts is minimum.
Optionally, the depth of the crescent groove 43 is about half of the thickness of the side wall of the separating plate 4, that is:
t f ≈0.5t
taking the crescent groove 43 located above as an example, the lower end of the crescent groove 43 is close to and does not exceed the arm plate, and the upper end is close to or slightly exceeds the lower edge of the upper end frame. In order to prevent the arm plate 42 of the separating plate 4 from being broken in the action process, the length of the arm plate 42 is not suitable to be too long, and the part opposite to the explosive cable 1 needs to be avoided, and the long axis of the flat tube 3 is set to be l b The height dimension l of the arm plate a ＝0.45l b And a chamfer is required to be arranged at the end part of the arm plate 42 at the left and right sides, the angle of the chamfer is about 40 degrees, and the chamfer can also be arranged to ensure that the wall plate can avoid the position opposite to the explosive cable.
The end bell 5 and the separator plate 4 are connected by bolts 6. The flat tubes 3 are disposed between the arm plates and the end frames 5 of the separator plates 4. The end frame 5 is connected with other parts of the rocket through bolts. The expansion pipe-double-groove plate separation structure mainly has the functions of connecting adjacent sections of the carrier rocket or connecting the carrier rocket and a payload and unlocking at the moment of separation, and specifically comprises the following steps:
the connection function is as follows: the rocket body is connected with an end frame 5 through bolts, and the end frame 5 is connected with a separating plate 4 through bolts 6 to complete load transmission.
Unlocking function: when the separation device is unlocked, the explosive cable 1 in the flat tube 3 is ignited to generate detonation, the flat tube 3 expands outwards under the action of the internal detonation to act on the separation plate 4, so that the separation plate 4 is broken at the weakening groove 41 to complete separation.
Optionally, in the design process, in order to optimize the size and material of the flat tube assembly and quantitatively obtain the capacity of the flat tube assembly for doing work externally, the flat tube is expanded to do work on the aluminum honeycomb on one side, and the capacity of the flat tube is quantitatively measured by using the compression amount of the aluminum honeycomb, and the specific method comprises the following steps:
referring to fig. 3, the flat tube assembly is placed in a device of a high-strength aluminum alloy on one side and an aluminum honeycomb on one side, an explosive cord 1 in the flat tube is detonated, the aluminum honeycomb is crushed under the expansion and extrusion action of the flat tube 3, the compression amount l of the aluminum honeycomb is measured, and the product is multiplied by the yield strength sigma of the aluminum honeycomb s ，E S ＝σ s· And l is the energy output to the aluminum honeycomb by the flat tube assembly. Also similar to the expansion tube separator, the flat tube assembly outputs energy to the separator plate 4. The flat tube size and the filler material which can lead the aluminum honeycomb to be compressed maximally are obtained by a plurality of equivalent test methods. According to the testing method, the equivalent model which is simple to operate and low in cost is used for testing the energy output of the flat tube, the structure of the flat tube is optimized, the energy output from the flat tube in the lateral direction is the largest, and the energy consumed by the separation plate can be quantitatively evaluated.
Compared with a traditional expansion pipe-double-groove plate separation structure, the expansion pipe-double-groove plate separation structure has the advantages that the unlocking function redundancy is taken as an idea, two groups of flat pipes are arranged in the expansion pipe-double-groove plate separation structure, any one group of flat pipes can be separated in structure, the flat pipes are still limited between the separation plates and the end frames after separation, and a mooring structure does not need to be designed independently. . Meanwhile, the crescent groove is formed in the separating plate, so that stress distribution on the separating plate is optimized to the maximum extent.
The expansion pipe separating device with redundant functions can greatly improve the separation reliability of the separating device.
The expansion pipe separating device has the advantages that when only one group of flat pipes works, the flat pipes expand to outwards support the arm plates of the separating plates, outwards force is applied to the weakening grooves, and finally the separating plates are mainly sheared to break at the weakening grooves. When the two groups of flat tubes work, the separating plate is simultaneously stressed by the outward supporting force of the two arm plates, and the separating plate is broken mainly by stretching at the weakening groove. The angle at which the blades flare outwardly is limited and the flattened tube remains captive in the separator after breaking. The whole ring of separating plates can be formed by adding through a forging machine or by combining a plurality of separating plates.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the invention. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (10)
1. A non-redundant expansion pipe separation device with redundant unlocking function is characterized by comprising an explosive cable (1), fillers (2), flat pipes (3), a separation plate group and an end frame (5);
the number of the groups of the separation plate groups is more than or equal to 1, and each group of the separation plate groups comprises 2 separation plates (4) which are oppositely arranged;
one surface of the separating plate (4) is provided with a weakening groove, the other surface is provided with a first arm plate and a second arm plate, and the first arm plate and the second arm plate are respectively positioned at two sides of the weakening groove;
the separating plate (4) is fixedly connected with the end frame (5), the end frame (5) comprises an upper end frame and a lower end frame, the upper end frame and the lower end frame are respectively connected with adjacent sections of the carrier rocket, or the upper end frame and the lower end frame are respectively connected with the payload and the carrier rocket body;
the number of the flat tubes (3) is 2, the flat tubes are respectively marked as a first flat tube and a second flat tube, a cavity for accommodating the first flat tube is formed between a first arm plate and an upper end frame of 2 oppositely arranged separation plates (4), and a cavity for accommodating the second flat tube is formed between a second arm plate and a lower end frame of 2 oppositely arranged separation plates (4);
the explosive cable (1) is positioned in the flat tube (3), and the filler (2) is filled between the explosive cable (1) and the flat tube (3).
2. The surplus expansion pipe separation device without redundancy in unlocking function according to claim 1, wherein the surface of the score-off plate (4) provided with the weakening groove is a first surface, the other surface is a second surface, and the second surface of the score-off plate (4) is provided with a first crescent socket and a second crescent socket which are recessed toward the first surface;
a cavity for accommodating a first flat tube is formed among the first arm plate and the lower edge of the upper end frame of the 2 separating plates (4) and the first crescent moon grooves of the 2 separating plates (4), and a cavity for accommodating a second flat tube is formed among the second arm plate and the upper edge of the lower end frame of the 2 separating plates (4) and the second crescent moon grooves of the 2 separating plates (4).
3. The separation device for the expansion pipe without redundancy in unlocking function according to claim 2, wherein on the second surface of the separation plate (4), the lower end of the first crescent socket is not lower than the setting position of the first arm plate, and the distance between the upper end of the first crescent socket and the projection position of the lower edge of the upper end frame on the second surface is not more than 2mm; the upper end of the second February tooth socket is not higher than the setting position of the second arm plate, and the distance between the lower end of the second February tooth socket and the projection position of the upper edge of the lower end frame on the second surface is less than or equal to 2mm.
4. The debris-free expansion pipe separation device with redundant unlocking functions according to claim 2, characterized in that the depth of the crescent groove is half of the thickness of the separation plate (4).
5. The expansion pipe separation device without redundancy in unlocking function according to claim 1, characterized in that the explosive cable (1) is located in the center of the flat pipe (3);
the first end of first armboard and the first end of second armboard are connected respectively in the second surface of division board (4), and when 2 division boards (4) set up relatively, form the gap just to first flat pipe between the second end of 2 first armboards, form the gap just to the second flat pipe between the second end of 2 second armboards.
6. A redundant expansion pipe separation device without unlocking function according to claim 5, characterized in that the height of the first arm plate and the second arm plate of the separation plate (4) in the direction perpendicular to the second surface of the separation plate (4) is equal, denoted by l a The major axis dimension of the flat tube (3) is expressed as l b Satisfies the following conditions:
0.43l b ≤l a ≤0.47l b 。
7. the excess-free expansion pipe separating device with redundant unlocking functions of claim 6, wherein the second end of the first arm plate and the second end of the second arm plate are provided with chamfers;
the angle of the chamfer is 30-50 degrees.
8. The excess-free expansion pipe separation device with redundant unlocking functions, as claimed in claim 1, wherein when the number of the separation plate groups is greater than 1, the 2 separation plates (4) included in each separation plate group are divided into two types, the first type separation plates in each separation plate group are spliced, and the second type separation plates in each separation plate group are spliced;
the long axis direction of the flat tubes (3) is vertical to the surface of the separating plate (4);
the separating plate (4) is of an arc plate structure, and the weakening grooves are arc grooves which are circumferentially arranged along the separating plate (4); or the separating plate (4) is of a flat plate structure, and the weakening grooves are linear grooves;
the separating plate (4) is fixedly connected with the end frame (5) through a bolt (6).
9. The separation device for the expansion pipe without redundancy in unlocking function is characterized in that a combination of an explosive cable (1), a filler (2) and a flat pipe (3) is used as a flat pipe assembly, and the energy output to a separation plate (4) by the flat pipe assembly is larger than or equal to the energy required by the separation plate (4) to break at a weakening groove;
the output energy of the flat tube assembly was tested by the following method:
placing the flat pipe assembly in a testing device with one side made of aluminum alloy and the other side made of aluminum honeycomb;
detonating an explosive cord (1), enabling the flat pipe assembly to do work on the aluminum honeycomb on one side, and measuring the compression l of the aluminum honeycomb;
calculating the energy E output by the flat tube assembly to the aluminum honeycomb S ＝σ s· l, where σ s Is the yield strength of the aluminum honeycomb;
will E S Equivalent to the energy output by the flat tube assembly to the separation plate (4).
10. A redundancy-free expansion pipe separation method with redundant unlocking functions, which is realized by the redundancy-free expansion pipe separation device with redundant unlocking functions, according to any one of claims 1 to 9, and comprises the following steps:
when the explosive cable (1) in at least one flat tube (3) is ignited, the separation plate (4) is broken at the weakening groove, and the first flat tube and the second flat tube are respectively retained in a cavity formed between the first arm plate and the upper end frame and a cavity formed between the second arm plate and the lower end frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210910165.7A CN115355771A (en) | 2022-07-29 | 2022-07-29 | Redundancy-unlocking-function-redundancy-free expansion pipe separation device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210910165.7A CN115355771A (en) | 2022-07-29 | 2022-07-29 | Redundancy-unlocking-function-redundancy-free expansion pipe separation device and method |
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Citations (7)
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| CN1089225A (en) * | 1992-11-02 | 1994-07-13 | 奥比托科学公司 | Frangible joint separation system |
| CN201317466Y (en) * | 2008-12-03 | 2009-09-30 | 北京宇航系统工程研究所 | Continuous separation device for transversely separating expansion pipe |
| CN201317467Y (en) * | 2008-12-03 | 2009-09-30 | 北京宇航系统工程研究所 | Expansion pipe separation device with explosive cord center positioning function |
| US20150246854A1 (en) * | 2014-02-28 | 2015-09-03 | Ensign-Bickford Aerospace & Defense Company | Fully-redundant frangible separation system |
| US20190168899A1 (en) * | 2017-12-01 | 2019-06-06 | Ensign-Bickford Aerospace & Defense Company | Separation device assemblies |
| CN109869394A (en) * | 2019-04-10 | 2019-06-11 | 罗定市麟千五金科技有限公司 | Setscrew |
| CN112212749A (en) * | 2020-10-16 | 2021-01-12 | 安徽理工大学 | Linear energy-gathering cutter for separating steel materials |
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2022
- 2022-07-29 CN CN202210910165.7A patent/CN115355771A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089225A (en) * | 1992-11-02 | 1994-07-13 | 奥比托科学公司 | Frangible joint separation system |
| CN201317466Y (en) * | 2008-12-03 | 2009-09-30 | 北京宇航系统工程研究所 | Continuous separation device for transversely separating expansion pipe |
| CN201317467Y (en) * | 2008-12-03 | 2009-09-30 | 北京宇航系统工程研究所 | Expansion pipe separation device with explosive cord center positioning function |
| US20150246854A1 (en) * | 2014-02-28 | 2015-09-03 | Ensign-Bickford Aerospace & Defense Company | Fully-redundant frangible separation system |
| US20190168899A1 (en) * | 2017-12-01 | 2019-06-06 | Ensign-Bickford Aerospace & Defense Company | Separation device assemblies |
| CN109869394A (en) * | 2019-04-10 | 2019-06-11 | 罗定市麟千五金科技有限公司 | Setscrew |
| CN112212749A (en) * | 2020-10-16 | 2021-01-12 | 安徽理工大学 | Linear energy-gathering cutter for separating steel materials |
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