CN110985237A - Connecting and fixing device for failure at high temperature based on memory alloy technology and application method - Google Patents
Connecting and fixing device for failure at high temperature based on memory alloy technology and application method Download PDFInfo
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- CN110985237A CN110985237A CN201911109540.2A CN201911109540A CN110985237A CN 110985237 A CN110985237 A CN 110985237A CN 201911109540 A CN201911109540 A CN 201911109540A CN 110985237 A CN110985237 A CN 110985237A
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- memory alloy
- temperature
- high temperature
- solid
- rocket engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
- F02K9/32—Constructional parts; Details not otherwise provided for
- F02K9/38—Safety devices, e.g. to prevent accidental ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/72—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid and solid propellants, i.e. hybrid rocket-engine plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Plates (AREA)
Abstract
The invention relates to a connecting and fixing device which is invalid at high temperature based on a memory alloy technology and an application method thereof, wherein the connecting and fixing device comprises a connecting structure body, an elastic clamping key or a check ring and a temperature-sensitive clamping block made of memory alloy; the connecting structure body is provided with a groove; the elastic clamping key or the retaining ring and the temperature-sensitive clamping block made of the memory alloy are arranged in the groove, and the temperature-sensitive clamping block made of the memory alloy exerts a restraining force on the elastic clamping key or the retaining ring. The invention can decompose the solid rocket engine when the solid rocket engine is subjected to temperature excitation such as fast burning and slow burning in the processes of storage, transportation, maintenance and the like, thereby forming a combustion chamber pressure release channel and avoiding secondary disasters such as explosion, detonation and the like of the engine.
Description
Technical Field
The invention relates to the field of initiating explosive devices and aircraft power devices, in particular to a memory alloy technology-based connecting and fixing device failing at high temperature and an application method thereof.
Background
The greater the destructive power generated with increasing energy of the solid propellant. When the solid rocket engine loaded with the solid propellant is excited by heat, flame, impact and other external parts, the danger of accidental ignition exists, so that explosion and even detonation occur, the solid rocket engine loses the function, and serious life and property loss is caused.
Solid rocket engines in missile weapons, in addition to requiring high performance, also place stringent demands on safety. The safety and reliability of the solid rocket engine can be greatly improved by adopting a low-vulnerability technology, the explosion or detonation of the engine under external stimulation is avoided, and the hidden danger of a using unit and a platform is reduced. Therefore, the solid rocket engine is widely concerned in the field of solid propulsion, becomes an important development direction of the solid rocket engine, and has a definite application direction and important significance for military equipment. The engine is decomposed when being excited by danger, which is an effective way for implementing low-vulnerability technology, and the combustion chamber can be quickly decompressed under the dangerous environment, so that the engine can not explode.
Disclosure of Invention
The invention aims to provide a connecting and fixing device which is invalid at high temperature based on a memory alloy technology and an application method thereof, and when the connecting and fixing device is excited at high temperature, a solid rocket engine can be decomposed to form a combustion chamber pressure relief channel, so that the explosion or detonation of the engine is avoided.
In order to achieve the purpose, the invention provides a connecting and fixing device which fails at high temperature based on a memory alloy technology, comprising a connecting structure body, an elastic clamping key or a retainer ring and a temperature-sensitive clamping block made of memory alloy; the connecting structure body is provided with a groove; the elastic clamping key or the retainer ring and the temperature-sensitive clamping block made of the memory alloy are arranged in the groove, and the temperature-sensitive clamping block made of the memory alloy exerts a restraining force on the elastic clamping key or the retainer ring.
According to the connecting and fixing device which loses efficacy at high temperature based on the memory alloy technology, when the environmental temperature is higher than the deformation temperature of the temperature-sensitive clamping block made of the memory alloy for a period of time, the temperature-sensitive clamping block made of the memory alloy deforms to lose the restraint on the elastic clamping key or the check ring, the elastic clamping key or the check ring restores to the original shape, and the connecting and fixing function fails.
The connection fixing device based on the memory alloy technology failure at high temperature further comprises a safety bolt, and the safety bolt is connected with the elastic clamping key or the check ring in a fighting state and used for fixing the state of the elastic clamping key or the check ring.
The invention also provides another technical scheme that the application method of the connecting and fixing device which fails at high temperature based on the memory alloy technology is used for a solid rocket engine, a solid-liquid hybrid rocket engine or a solid gas generator, and when the connecting and fixing device fails at high temperature based on the memory alloy technology is excited by external unexpected high temperature, the solid rocket engine, the solid-liquid hybrid rocket engine or the solid gas generator is decomposed by the connecting and fixing device which fails at high temperature based on the memory alloy technology.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention can decompose the solid rocket engine when the solid rocket engine is subjected to temperature excitation such as fast burning and slow burning in the processes of storage, transportation, maintenance and the like, thereby forming a combustion chamber pressure release channel and avoiding secondary disasters such as explosion, detonation and the like of the engine.
Drawings
The invention relates to a connecting and fixing device based on memory alloy technology failure at high temperature and an application method thereof, which are provided by the following embodiments and attached drawings.
FIG. 1 is a schematic view of a memory alloy technology-based high temperature failure connection fixture for conventional solid rocket engine combustor and nozzle connections, according to a preferred embodiment of the present invention.
FIG. 2 is a schematic view of a connection fixture failing at high temperature based on the memory alloy technology according to a preferred embodiment of the present invention.
Detailed Description
The connection fixing device and the application method based on the memory alloy technology failure at high temperature according to the present invention will be described in further detail with reference to fig. 1 to 2.
The connecting and fixing device which fails at high temperature based on the memory alloy technology comprises a connecting structure body, an elastic clamping key or a check ring and a temperature-sensitive clamping block made of memory alloy;
the connecting structure body is provided with a groove; the elastic clamping key or the retaining ring and the temperature-sensitive clamping block made of the memory alloy are arranged in the groove, and the temperature-sensitive clamping block made of the memory alloy exerts a restraining force on the elastic clamping key or the retaining ring.
The connecting and fixing device of the invention utilizes the matching of the connecting structure body and the elastic clamping key (or the check ring) to fix the relative position of the connected parts, thereby achieving the purpose of connecting and fixing, and the elastic clamping key or the check ring has the functions of limiting and positioning. In the normal working state (realizing the purpose of connecting and fixing), the elastic clamping key or the retainer ring can not loosen and move, otherwise, the elastic clamping key or the retainer ring loses the functions of limiting and positioning. When the temperature-sensitive clamping block made of the memory alloy is excited by high temperature, the temperature-sensitive clamping block made of the memory alloy is heated to generate deformation, the deformation enables the temperature-sensitive clamping block made of the memory alloy to lose constraint on the elastic clamping key or the check ring, and the elastic clamping key or the check ring loses the limiting and positioning functions, so that separation at the position is realized.
The connection and fixation device based on memory alloy technology failure at high temperature according to the present invention will now be described in detail with reference to the specific embodiments.
FIG. 1 is a schematic view of the memory alloy technology-based high-temperature failure connection fixture of the present embodiment for use in conventional solid rocket engine combustor and nozzle connections; fig. 2 is a schematic view of the connection fixing device failing at high temperature based on the memory alloy technology according to the embodiment.
Referring to fig. 1, a throat liner heat insulation layer 8 is sleeved on one section of a throat liner 9 at the tail part of a combustion chamber of a solid rocket engine, a shell heat insulation layer 1 is sleeved on the throat liner heat insulation layer 8, a diffusion section 10 is sleeved on the rest section of the throat liner 9, a diffusion section support 3 is sleeved on the diffusion section 10, a nozzle shell 2 is sleeved on the diffusion section support 3, and the throat liner heat insulation layer 8, the throat liner 9, the diffusion section 10 and the diffusion section support 3 are bonded into a whole; the inner wall of the spray pipe shell 2 is provided with a groove, and a retainer ring or an elastic clamping key is arranged in the groove and used for limiting the movement of the bonding body (namely the throat lining heat-insulating layer 8, the throat lining 9, the diffusion section 10 and the diffusion section support 3) in the axial direction, so that the bonding body and the spray pipe shell 2 are connected and fixed.
Taking a check ring as an example, referring to fig. 2, a spray pipe shell 2 is a connecting structure body, an annular groove is formed in the inner wall of the spray pipe shell 2, the check ring 4 and a temperature-sensitive clamping block 5 made of memory alloy are combined into an annular body, and the annular body is placed in the annular groove; the retainer ring 4 is an elastic retainer ring and has certain telescopic capacity, and when the retainer ring is placed in the annular groove, the thermosensitive clamping block 5 made of memory alloy applies force to the retainer ring 4 to compress the retainer ring 4; a ring body formed by combining the retainer ring 4 and the temperature-sensitive clamping block 5 made of memory alloy limits the bonding body, fixes the relative position between the bonding body and the spray pipe shell 2 and achieves the effect of connection and fixation. The temperature-sensitive clamping block 5 made of memory alloy exerts force on the retaining ring 4, so that the retaining ring 4 can be prevented from loosening and moving and separating from the original position, and the effect of connection and fixation is guaranteed to be effective.
When the solid rocket engine is subjected to sudden conditions of rapid burning, slow burning and the like caused by accidents such as external explosion, fire, impact and the like, the temperature of the temperature-sensitive fixture block 5 made of the memory alloy reaches a certain value (the ideal temperature is about 110 ℃) and is kept for a period of time and then begins to deform and separate from the retainer ring 4, the retainer ring 4 restores to the original shape due to the loss of the constraint of the temperature-sensitive fixture block 5 made of the memory alloy, the limiting fixing fails (namely the connecting and fixing function of the connecting and fixing device fails), and the throat liner heat-insulating layer 8, the throat liner 9, the diffusion section bracket 3 and the diffusion section 10 which are integrally bonded fall off under the action of internal pressure, so that a large pressure relief opening is formed, and the explosion and even detonation of the engine caused by high pressure formed after the combustion.
When the elastic clamping key is used for limiting and fixing, grooves are formed in the inner wall of the spray pipe shell 2 at positions where limiting fixed points need to be designed, and if a plurality of limiting fixed points exist, a plurality of grooves need to be formed; an elastic clamping key and a temperature-sensitive clamping block 5 made of memory alloy are arranged in each groove, the temperature-sensitive clamping block 5 made of memory alloy applies force to the elastic clamping key, so that the elastic clamping key is compressed, the elastic clamping key is prevented from loosening and moving and is separated from the original position, and the effect of connection and fixation is guaranteed to be effective. When the solid rocket engine is excited by external unexpected high temperature, the temperature of the temperature-sensitive fixture block 5 made of the memory alloy reaches a certain value and is kept for a period of time, then the temperature-sensitive fixture block 5 is deformed and separated from the elastic fixture key, the elastic fixture key is recovered due to the loss of the constraint of the temperature-sensitive fixture block 5 made of the memory alloy, the limiting and fixing are invalid, and the throat liner heat-insulating layer 8, the throat liner 9, the diffusion section bracket 3 and the diffusion section 10 which are bonded into a whole integrally fall off under the action of internal pressure, so that a large pressure relief opening is formed, and the phenomenon that the engine explodes or even explodes due to high pressure formed after the solid propellant in.
In a fighting state, the connecting and fixing function of the connecting and fixing device is guaranteed to be effective, and in order to prevent the influence of high temperature on the connecting and fixing device in the fighting process, the connecting and fixing device can further comprise a safety bolt, as shown in fig. 2, the safety bolt is connected with an elastic clamping key or a check ring and is used for fixing the state of the elastic clamping key or the check ring, so that even if the high temperature in the fighting process is higher than the deformation temperature of the temperature-sensitive clamping block 5 made of the memory alloy, the temperature-sensitive clamping block 5 made of the memory alloy is deformed, and the elastic clamping key or the check ring cannot be loosened or moved and is separated from the original position, so that the reliability of the connecting and fixing function is guaranteed. The connection fixing device comprises a safety bolt, and the safety bolt is not installed (namely not used) in a state (such as storage, transportation, maintenance and the like) of responding to unexpected dangers, and is installed before the missile is launched.
If the temperature in the fighting process is always lower than the deformation temperature of the temperature-sensitive clamping block 5 made of the memory alloy, the connecting and fixing device can omit a safety bolt.
The connecting and fixing device failing at high temperature based on the memory alloy technology can be used for a solid rocket engine, a solid-liquid hybrid rocket engine or a solid gas generator, and when the connecting and fixing device failing at high temperature based on the memory alloy technology is excited by external unexpected high temperature, the solid rocket engine, the solid-liquid hybrid rocket engine or the solid gas generator are decomposed.
Claims (5)
1. The connecting and fixing device which fails at high temperature based on the memory alloy technology is characterized by comprising a connecting structure body, an elastic clamping key or a check ring and a temperature-sensitive clamping block made of memory alloy;
the connecting structure body is provided with a groove; the elastic clamping key or the retaining ring and the temperature-sensitive clamping block made of the memory alloy are arranged in the groove, and the temperature-sensitive clamping block made of the memory alloy exerts a restraining force on the elastic clamping key or the retaining ring.
2. The connection and fixation device that fails at high temperature based on memory alloy technology as claimed in claim 1, wherein when the ambient temperature is higher than the deformation temperature of the temperature-sensitive fixture block made of memory alloy for a period of time, the temperature-sensitive fixture block made of memory alloy deforms and loses the constraint on the elastic fixture key or the retainer ring, and the elastic fixture key or the retainer ring recovers to its original shape, thereby failing in connection and fixation function.
3. The memory alloy technology-based high-temperature failure connection and fixation device as claimed in claim 1, further comprising a safety bolt, wherein the safety bolt is connected with the elastic clamping key or the retainer ring in a fighting state and is used for fixing the state of the elastic clamping key or the retainer ring.
4. The method for applying a connecting and fixing device failing under high temperature based on memory alloy technology as claimed in claim 1, which is used for a solid rocket engine, a solid-liquid hybrid rocket engine or a solid gas generator, wherein the connecting and fixing device failing under high temperature based on memory alloy technology decomposes the solid rocket engine, the solid-liquid hybrid rocket engine or the solid gas generator when being excited by external unexpected high temperature.
5. The method for applying the connecting and fixing device failing at high temperature based on the memory alloy technology in claim 3, which is used for a solid rocket engine, a solid-liquid hybrid rocket engine or a solid gas generator, wherein when the connecting and fixing device failing at high temperature based on the memory alloy technology is excited by external unexpected high temperature, the solid rocket engine, the solid-liquid hybrid rocket engine or the solid gas generator is decomposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911109540.2A CN110985237A (en) | 2019-11-13 | 2019-11-13 | Connecting and fixing device for failure at high temperature based on memory alloy technology and application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911109540.2A CN110985237A (en) | 2019-11-13 | 2019-11-13 | Connecting and fixing device for failure at high temperature based on memory alloy technology and application method |
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| CN110985237A true CN110985237A (en) | 2020-04-10 |
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| CN201911109540.2A Pending CN110985237A (en) | 2019-11-13 | 2019-11-13 | Connecting and fixing device for failure at high temperature based on memory alloy technology and application method |
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| CN (1) | CN110985237A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124247A (en) * | 2021-04-30 | 2021-07-16 | 中国工程物理研究院机械制造工艺研究所 | Pipeline sealing structure capable of realizing high-temperature air leakage safety protection, pipeline sealing and high-temperature air leakage method |
| CN114165355A (en) * | 2021-10-20 | 2022-03-11 | 中国航发四川燃气涡轮研究院 | Intelligent tail jet pipe structure based on shape memory alloy and exhaust system |
| CN117028079A (en) * | 2023-10-08 | 2023-11-10 | 北京星河动力装备科技有限公司 | Jet device, rocket power device and rocket |
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| US20040244358A1 (en) * | 2000-07-03 | 2004-12-09 | Alf Prytz | Method and arrangement for preventing encased explosive being caused to explode by an external fire |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124247A (en) * | 2021-04-30 | 2021-07-16 | 中国工程物理研究院机械制造工艺研究所 | Pipeline sealing structure capable of realizing high-temperature air leakage safety protection, pipeline sealing and high-temperature air leakage method |
| CN114165355A (en) * | 2021-10-20 | 2022-03-11 | 中国航发四川燃气涡轮研究院 | Intelligent tail jet pipe structure based on shape memory alloy and exhaust system |
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| CN117028079A (en) * | 2023-10-08 | 2023-11-10 | 北京星河动力装备科技有限公司 | Jet device, rocket power device and rocket |
| CN117028079B (en) * | 2023-10-08 | 2024-02-20 | 北京星河动力装备科技有限公司 | Jet device, rocket power device and rocket |
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Application publication date: 20200410 |
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