CN112324595B - Putty removal and heat removal protection structure for front swing core flexible spray pipe - Google Patents
Putty removal and heat removal protection structure for front swing core flexible spray pipe Download PDFInfo
- Publication number
- CN112324595B CN112324595B CN202011209989.9A CN202011209989A CN112324595B CN 112324595 B CN112324595 B CN 112324595B CN 202011209989 A CN202011209989 A CN 202011209989A CN 112324595 B CN112324595 B CN 112324595B
- Authority
- CN
- China
- Prior art keywords
- heat
- putty
- flexible
- fixed body
- spray pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- F02K9/97—Rocket nozzles
-
- 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
- F02K9/80—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by thrust or thrust vector control
- F02K9/84—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by thrust or thrust vector control using movable nozzles
-
- 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
- F02K9/97—Rocket nozzles
- F02K9/974—Nozzle- linings; Ablative coatings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
Abstract
The invention provides a putty-removing and heat-insulating protection structure for a front swing core flexible spray pipe, wherein a slender slit formed between a throat liner assembly and an insulating sleeve can isolate most high-temperature and high-pressure gas, and a non-uniform-thickness heat-proof grid structure realizes non-metal reinforcement, putty removal of a flexible joint and long-term storage of the flexible spray pipe.
Description
Technical Field
The invention belongs to the technical field of solid rocket engine spray pipes, and particularly relates to a putty-removing and heat-melting protection structure for a front swing core flexible spray pipe.
Background
The flexible jet pipe is a main means for realizing vector control of the solid rocket engine. With the overall higher and higher requirements on the nozzle indexes, more and more engines adopt a forward swing center flexible nozzle scheme. At present, the forward swing center spray pipe is applied to models abroad.
The SB-735 solid rocket engine is a bundled booster engine for Japanese "Mur-3S 2" (M-232) launch vehicles, 2 for each use, developed by the Japanese research institute for cosmic sciences. The engine spray pipe adopts a front swing center flexible spray pipe and swings in a single shaft. The flexible joint heat insulation layer is composed of a lining and a CFRP heat insulation layer, the lining is wrapped on the outer side of the flexible joint to play a joint heat protection role, and the lining is made of silicon rubber which has excellent heat resistance and low hardness; the CFRP insulation layer serves to protect the liner and flexible joints from direct exposure to gas heat flux scouring and radiation.
The Israel 'monster snake 3' solid rocket engine is an engine of an Israel 'monster snake 3' air-air missile, is developed by Israel Rafael (RAFAEL) company, and is a single-combustion-chamber two-stage thrust type (boosting-cruising) engine. The 'odd snake 3' engine adopts a front swinging core flexible spray pipe, and a flexible joint is insulated by a high-extensibility rubber heat-insulating sleeve.
For the flexible joint of the non-metal reinforcement part, part of putty can be swung out in the swinging process of the spray pipe by using the putty, so that redundant substances are generated, and the long-term storage of the product is influenced. Therefore, a putty-removed thermal protection structure needs to be designed for carrying out effective thermal protection on the nonmetal reinforcing part front swing center flexible spray pipe, and the design and the application of the thermal protection structure for the vector spray pipe of the solid rocket engine can produce positive effects.
Disclosure of Invention
In view of the above, the invention aims to provide a putty-removing heat-protecting structure for a front swing center flexible nozzle, which can isolate most high-temperature and high-pressure gas, reduce damage to a flexible joint and solve the problem of long-term storage of the flexible nozzle.
A flexible joint heat protection structure of a front swing center flexible jet pipe comprises a throat liner assembly (1), a heat insulation sleeve (2), a fixed body heat insulation layer (3) and a heat protection grid (4);
the heat-proof grid (4) is a grid-shaped structure formed by extending and thickening the nonmetal reinforcing part of the flexible joint (5) and increasing the thickness of the reinforcing part;
the lower end of the fixed body heat insulation layer (3) is fixedly connected with a fixed body shell (6) of the flexible spray pipe; one end of the flexible joint (5) is fixedly connected with the throat lining component (1), and the other end of the flexible joint is fixedly connected with the fixed body shell (6); the lower end of the heat insulation sleeve (2) is bonded with the upper end of the heat insulation layer (3) of the fixed body, and a slit is reserved between the upper end of the heat insulation sleeve (2) and the front end of the throat insert component (1);
the heat-proof grid (4) is positioned in a space surrounded by the heat-insulating sleeve (2), the heat-insulating layer (3) of the fixed body, the throat liner assembly (1) and the flexible joint (5).
Preferably, the width of the slit formed between the heat insulation sleeve (2) and the front end of the throat insert component (1) is less than 5 mm.
Preferably, the width of the slit between the heat-proof grids (4) is less than 1 mm.
Preferably, the throat insert component (1) is made of a fine woven puncture C/C composite material and asbestos phenolic.
Preferably, the heat insulation sleeve (2) is made of molded carbon fiber.
Preferably, the fixing body heat insulation layer (3) is molded high-silicon-oxygen.
Preferably, the heat-proof grid (4) is made of high-strength glass cloth/epoxy resin composite material.
The invention has the following beneficial effects:
the invention provides a putty-removing and heat-insulating protection structure for a front swing core flexible spray pipe, wherein a slender slit formed between a throat liner assembly and an insulating sleeve can isolate most high-temperature and high-pressure gas, and a non-uniform-thickness heat-proof grid structure realizes non-metal reinforcement, putty removal of a flexible joint and long-term storage of the flexible spray pipe.
Drawings
FIG. 1 is a schematic view of a putty removing and heat melting protection structure for a front swing center flexible nozzle of the invention;
wherein, 1-a throat insert component; 2-a heat-insulating sleeve; 3-fixing body heat insulating layer; 4-non-uniform thickness heat-proof grid; 5-a flexible joint; 6-fixing the body shell.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The flexible joint 5 consists of an elastic part and a non-metal reinforcing part; the thermal protection method of the front swing center flexible nozzle for the flexible joint of the non-metal reinforcement part is to coat putty between thermal barriers. The putty can leave the heat-proof grid along with swinging in the process of the swinging experiment of the joint and the spray pipe, and is attached to other structures or cavities to form an excess which is difficult to clean. The invention prolongs and thickens the non-metal reinforcement to form a grid-shaped structure with the thickness different from that of the reinforcement, replaces the function of putty, realizes the putty removal of the flexible joint thermal protection structure of the non-metal reinforcement and solves the problem of long-term storage of the flexible spray pipe.
The invention is explained by taking a flexible joint heat protection structure of a certain front swinging center flexible nozzle as an example, as shown in figure 1, the heat protection structure consists of a throat insert assembly 1, a heat insulation sleeve 2, a fixed body heat insulation layer 3 and a heat protection grid 4.
(1) The material of the thermal protection structure is determined according to the use requirement: the throat lining component 1 adopts a fine weaving puncture C/C composite material and asbestos phenolic; the heat insulation sleeve 2 adopts molded carbon fiber; the heat insulating layer 3 of the fixing body adopts mould pressing high silica; the heat-proof grid 4 is made of high-strength glass cloth/epoxy resin composite material.
(2) According to a design task book, through calculation and test verification, the design of the flexible joint thermal protection structure is completed, gaps among all parts and the sizes of all parts are determined, and then all parts are machined;
(3) Firstly, the lower end of the heat insulating layer 3 of the fixed body is bonded and solidified with the shell 6 of the fixed body, the heat-proof grid 4 and the reinforcing piece are integrated, and the heat-proof grid and the reinforcing piece are pressed together to form a flexible joint 5;
(4) Then the throat liner component 1 and the flexible joint 5 are combined and bonded to form a shape;
(5) Finally, the lower end of the heat insulation sleeve 2 is bonded with the upper end of the heat insulation layer 3 of the fixed body, and a long and narrow slit is ensured between the upper end of the heat insulation sleeve 2 and the front end of the throat insert component 1.
(6) And finishing the group bonding forming of the spray pipe flexible joint heat protection structure.
The connecting part of the movable body and the fixed body of the front swing center flexible spray pipe inevitably faces high-temperature and high-pressure gas in the combustion chamber, so that the thermal protection is relatively difficult. The core of the flexible joint heat protection structure is to reduce the heat convection between the inner cavity joint and the fuel gas. As shown in figure 1, the width L of a slit formed between the heat-insulating sleeve 2 and the front end of the throat insert component 1 can be controlled within 5mm, so that the heat-insulating sleeve 2, the heat-insulating layer 3 of the fixed body and the flexible joint 5 can move relative to the throat insert component 1, and high-temperature and high-pressure gas entering a space in front of the flexible joint 5 can be effectively reduced; the width d of the slit between the heat-proof grids 4 can be controlled within 1mm, so that the impact of gas on the flexible joint 5 can be further reduced; the control ranges of the slit width formed between the heat insulation sleeve 2 and the front end of the throat insert component 1 and the slit width of the heat protection grid 4 are obtained through tests, and the specific design width value can be checked by finite element simulation so as to ensure that the flexible joint 5 does not have large temperature rise in the working time and works normally. Finally, according to the requirement of the swinging angle of the spray pipe, enough swinging space is reserved among the heat insulation sleeve 2, the heat insulation layer 3 of the fixed body and the heat protection grid 4 to prevent collision and interference among all the parts.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A putty-removing and heat-melting protective structure for a front swinging-core flexible nozzle is characterized by comprising a throat lining assembly (1), a heat-insulating sleeve (2), a fixed body heat-insulating layer (3) and a heat-proof grid (4);
the heat-proof grid (4) is a grid-shaped structure which is formed by extending and thickening the nonmetal reinforcing part of the flexible joint (5) and has the thickness different from that of the reinforcing part;
the lower end of the fixed body heat insulation layer (3) is fixedly connected with a fixed body shell (6) of the flexible spray pipe; one end of the flexible joint (5) is fixedly connected with the throat liner assembly (1), and the other end of the flexible joint is fixedly connected with the fixed body shell (6); the lower end of the heat insulation sleeve (2) is bonded with the upper end of the heat insulation layer (3) of the fixed body, and a slit is reserved between the upper end of the heat insulation sleeve (2) and the front end of the throat insert component (1);
the heat-proof grid (4) is positioned in a space surrounded by the heat-insulating sleeve (2), the heat-insulating layer (3) of the fixed body, the throat lining component (1) and the flexible joint (5).
2. The putty-removing heat protecting structure for front swinging core flexible nozzle as set forth in claim 1, characterized in that the width of the slit formed between the heat insulating sleeve (2) and the front end of the throat insert assembly (1) is within 5 mm.
3. The depickling heat shield structure for front swinging core flexible nozzles according to claim 1, characterized in that the slit width between the heat shields (4) is within 1 mm.
4. The putty removing and heat sealing structure for the front swing core flexible nozzle as set forth in claim 1, characterized in that said throat insert assembly (1) is made of a fine-woven piercing C/C composite material and asbestos phenolic.
5. The putty-removing and heat-insulating protective structure for front swinging core flexible nozzle as set forth in claim 1, characterized in that said heat insulating sleeve (2) is made of molded carbon fiber.
6. The putty-removing and heat-protecting structure for the front swinging core flexible nozzle as set forth in claim 1, characterized in that the heat insulating layer (3) of the fixing body is molded high silica.
7. The putty-removing and heat-protecting structure for the front swing core flexible nozzle as set forth in claim 1, characterized in that the heat-protecting grid (4) is made of high-strength glass cloth/epoxy resin composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011209989.9A CN112324595B (en) | 2020-11-03 | 2020-11-03 | Putty removal and heat removal protection structure for front swing core flexible spray pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011209989.9A CN112324595B (en) | 2020-11-03 | 2020-11-03 | Putty removal and heat removal protection structure for front swing core flexible spray pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324595A CN112324595A (en) | 2021-02-05 |
| CN112324595B true CN112324595B (en) | 2022-11-08 |
Family
ID=74323511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011209989.9A Active CN112324595B (en) | 2020-11-03 | 2020-11-03 | Putty removal and heat removal protection structure for front swing core flexible spray pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324595B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074062B (en) * | 2021-04-01 | 2022-04-29 | 湖北航天技术研究院总体设计所 | Wide-temperature-range flexible joint and flexible spray pipe |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3390899A (en) * | 1965-03-15 | 1968-07-02 | Lockheed Aircraft Corp | Flexible joint means |
| JP6751584B2 (en) * | 2016-04-01 | 2020-09-09 | 株式会社Ｉｈｉエアロスペース | Movable nozzle of rocket motor |
| CN106287101B (en) * | 2016-08-30 | 2018-05-22 | 湖北三江航天江北机械工程有限公司 | The adhering method and sealing frock of solid rocket motor nozzle and flexible blanking cover |
| CN109184959B (en) * | 2018-07-26 | 2021-04-20 | 西安航天动力技术研究所 | Weftless fabric needle-punched throat insert spray pipe |
| CN111365144B (en) * | 2020-02-28 | 2023-03-24 | 上海新力动力设备研究所 | Flexible joint and solid rocket engine jet pipe adopting same |
| CN111188700A (en) * | 2020-03-03 | 2020-05-22 | 内蒙古工业大学 | Variable-section double-flexible spray pipe of solid rocket engine |
-
2020
- 2020-11-03 CN CN202011209989.9A patent/CN112324595B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112324595A (en) | 2021-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112324595B (en) | Putty removal and heat removal protection structure for front swing core flexible spray pipe | |
| ES2214520T3 (en) | A COMPOSITE STRATIFICATE. | |
| CN110524974B (en) | Prevent thermal-insulated integrative hot protective structure suitable for negative curvature appearance | |
| JP2019081361A (en) | Modular mold for manufacturing fiber reinforcement panel and manufacturing method of fiber reinforcement panel | |
| EP3668795B1 (en) | Multi-functional protective assemblies, systems including protective assemblies, and related methods | |
| ES2426592T3 (en) | Apparatus for infusion of resin in a preform in a closed mold | |
| CN111207006A (en) | Solid rocket engine large-debonding full-filling explosive filling structure | |
| CN109244997B (en) | Embedded cable cabin penetrating structure in composite material shell | |
| Kelly et al. | Active cooling from the sixties to NASP | |
| CN210653691U (en) | Fairing and aerospace craft | |
| CN113482800A (en) | Fuel gas guide plate based on film vaporization cooling principle and use method thereof | |
| CN218577044U (en) | Engine housing and spray pipe integrated structure | |
| Bouchez et al. | Advanced carbon/carbon injection strut for actual scramjet | |
| RU2622181C1 (en) | Thermal protection of unsealed compartments of aircraft powerplant | |
| RU170276U1 (en) | Rocket engine nozzle | |
| Kelly et al. | Research in structures and materials for future space transportationsystems-An overview | |
| CN111912292A (en) | Bulletproof and composite structure integrated launch canister and preparation method thereof | |
| CN114889157A (en) | Engine shell and spray pipe integrated structure and preparation method thereof | |
| JP7464937B2 (en) | Flying object | |
| Kearney et al. | Advanced solid rocket motor nozzle development status | |
| CN113669558B (en) | Heat insulation tile based on resin-based carbon foam and preparation method thereof | |
| Langston et al. | Parametric Study of an Ablative TPS and Hot Structure Heatshield for a Mars Entry Capsule Vehicle | |
| CN117104389A (en) | Vibration-damping submarine pressure-resistant shell capable of recovering shape and preparation method thereof | |
| CN105865262B (en) | Launch the launching tube of tube inner surface burn-out proof method and application this method | |
| Nowak et al. | Actively cooled airframe structures for high-speed flight |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |