CN109236497B - Lateral force solid gas generator - Google Patents
Lateral force solid gas generator Download PDFInfo
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- CN109236497B CN109236497B CN201811038437.9A CN201811038437A CN109236497B CN 109236497 B CN109236497 B CN 109236497B CN 201811038437 A CN201811038437 A CN 201811038437A CN 109236497 B CN109236497 B CN 109236497B
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- filter screen
- gas pipeline
- combustion chamber
- gas
- secondary filter
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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
- F02K9/10—Shape or structure of solid propellant charges
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a lateral force solid fuel gas generator, which solves the problem of cleanliness of fuel gas for a steering engine of a control system. The gas generator includes: ignition utensil, combustion chamber, powder charge, gas pipeline, one-level filter screen, second grade filter screen, clamping ring, end cap. The igniter is connected with the combustion chamber by threads; the combustion chamber is connected with the gas pipeline by screw threads; the charge is fixed in the combustion chamber by an ignition bracket and a medicine baffle plate; the primary filter screen is formed into a cylindrical shape by one-step die pressing of molybdenum wires and is arranged in an inner hole of the gas pipeline; the secondary filter screen is formed into a cylindrical shape by one-step die pressing of molybdenum wires and is arranged in an inner hole of the gas pipeline; the compression ring is arranged in an inner hole of the gas pipeline; the outlet of the gas pipeline is provided with a steering engine mounting thread, and the plug is in threaded connection with the gas pipeline; the fuel gas provided by the invention is clean and is suitable for a portable missile control system.
Description
Technical Field
The invention relates to a lateral force solid fuel gas generator, which is mainly suitable for the field of fuel gas generators.
Technical Field
The high-precision and quick-response guidance control technology based on the lateral force control is a main direction for researching the precise guidance of the aircraft, and has wide application. However, gas generators for generating lateral forces currently suffer from the following disadvantages: the particle size of solid-phase particles in gas generated by charge combustion is generally about 0.1mm, so that the steering engine is easy to clamp. In order to solve the problem of clamping stagnation of the steering engine, the conventional fuel gas generator adopts technical measures such as a filter screen, a filter plate, a filter column and the like. But because the gas flow rate is high, the impact force is large, and the molybdenum or steel single-layer or multi-layer filter screen is easy to be damaged by gas impact to form residues to enter the steering engine; steel filter, filter column gas pass through the hole and generally all be greater than 0.5 millimeter, and the filter effect is not obvious, and the material melting point is less than the gas temperature moreover, is destroyed easily and forms the residue and gets into the steering wheel. The residue easily causes rudder shaft abrasion and clamping stagnation after entering the steering engine, reduces the control precision of the lateral force and causes the control failure of the aircraft in serious cases.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a lateral force solid fuel gas generator capable of outputting clean fuel gas. The cylindrical filter screen is made of molybdenum wires with high melting points, two stages of filter screens are adopted to carry out combined filtration on particles in the fuel gas, and parameters such as quality, outer diameter and height of the filter screens are controlled to ensure density consistency of the filter screens and stability of fuel gas output.
The realization process of the invention is as follows:
a side force solid gas generator, comprising: ignition utensil, combustion chamber, powder charge, gas pipeline, one-level filter screen, second grade filter screen, clamping ring, end cap.
The ignition device is in threaded connection with the combustion chamber, and a copper sealing ring (better in ductility and elasticity than steel and better in sealing) and a rubber O-shaped sealing rubber ring double-layer sealing structure are adopted;
the combustion chamber is connected with the gas pipeline by threads and is sealed by a copper sealing ring;
a throat is designed at the inlet of the gas pipeline, a primary filter screen, a secondary filter screen and a compression ring mounting space are designed in the middle of the gas pipeline, and an external interface thread is processed at the outlet end of the gas pipeline;
the charge is freely filled in the combustion chamber and is fixed by the ignition bracket and the medicine baffle plate;
the primary filter screen is wound and molded into a column-shaped porous structure (similar to a steel wire ball structure) by adopting molybdenum wires with the diameter phi of 0.25mm, and the pressure difference between two ends is actually measured to be 250-300 Pa by adopting a maximum bubble pressure method. The one-level filter screen is higher than the melting point of the steel material and can not be melted by high-temperature gas. Compared with the prior molybdenum filter screen, the molybdenum filter screen has high strength of the whole structure and is not easy to be scoured and damaged by high-speed airflow. The filter screen is controlled by structural parameters to form a larger filtering gap, the cylindrical filter screen has the outer diameter phi of 7.36 mm-phi 7.42mm, the height of 5.0 mm-5.1 mm and the mass of 1.00 g-1.05 g, is arranged in a gas pipeline, can filter residues with larger particle size, and does not block gas from passing through.
The secondary filter screen is wound and molded into a column-shaped porous structure by adopting molybdenum wires with the diameter phi of 0.20mm (the same as above), and the pressure difference between two ends is actually measured to be 300-350 Pa by adopting a maximum bubble pressure method. The second grade filter screen is higher than the melting point of the steel material and can not be melted by high-temperature gas. Compared with the prior molybdenum filter screen, the molybdenum filter screen has high strength of the whole structure and is not easy to be scoured and damaged by high-speed airflow. The filter screen is controlled by structural parameters to form a small filtering gap, the cylindrical filter screen has the outer diameter phi of 7.36-7.42 mm, the height of 5.00-5.10 mm and the mass of 1.15-1.20 g, is arranged in a gas pipeline, can filter residues with small particle size, and does not block gas from passing.
The compression ring is arranged in the gas pipeline and used for compressing and fixing the filter screen. The first-stage filter screen and the second-stage filter screen which are compressed and fixed are tightly combined to form a combined filter structure and are tightly matched with a gas pipeline. The primary filter screen filters residues with larger grain sizes, the secondary filter screen filters residues with smaller grain sizes, and clean fuel gas is finally output, wherein the grain size of solid residues in the fuel gas is smaller than 10 mu m. The plug is arranged at the outlet thread of the gas pipeline, and the plug is not used when the gas generator is connected with the steering engine.
The working principle of the invention is as follows: the switching on of ignition tool is followed the powder charge and is igniteed, and the powder charge burning produces the gas, and the gas pipeline is through entry throat control gas flow, and the gas outwards flows via the gas pipeline, and great granule is filtered in the one-level filter screen to the gas, and the second grade filter screen filters less granule in the gas, and the gas forms the yawing force to the flow direction steering wheel after twice filters.
The invention has the advantages that: the invention has simple structure, quick assembly and convenient maintenance. The primary filter screen is adopted to carry out initial filtration on the fuel gas, so that solid-phase particles in the fuel gas are effectively reduced. And a secondary filter screen is adopted to finely filter the fuel gas, so that solid-phase particles in the fuel gas are further reduced. The primary filter screen and the secondary filter screen adopted by the invention have high strength, high melting point and stable and reliable work.
Drawings
FIG. 1 is a cross-sectional structure diagram of a lateral force gas starter, which comprises 1-an igniter, 2-a combustion chamber, 3-a charge, 4-a gas pipeline, 5-a primary filter screen, 6-a secondary filter screen, 7-a compression ring and 8-a plug.
Fig. 2 is a schematic diagram of a screen structure.
Detailed Description
The invention is further illustrated by the following specific examples and the accompanying drawings.
Referring to fig. 1, in the lateral force gas generator, an igniter 1 is screwed with a combustion chamber 2, and a copper gasket and an o-ring double-layer sealing structure are adopted. The combustion chamber 2 is connected with the gas pipeline 4 by screw thread and sealed by a copper gasket. The charge 3 is freely filled in the combustion chamber and is fixed by the ignition bracket and the medicine baffle plate. The gas pipeline 4 is made of 1Cr17Ni2 material, a throat is designed at the inlet, the combustion pressure, the combustion speed and the generated gas flow of the charge 3 are controlled through the diameter of the throat, a primary filter screen 5, a secondary filter screen 6 and a compression ring 7 are sequentially designed inside the gas pipeline 4 according to the gas flow direction, and an external interface thread is processed at the outlet end; the first-stage filter screen 5 is wound and molded into a column structure by adopting molybdenum wires with the diameter phi of 0.25mm, and a single-piece filter screen with the outer diameter phi of 7.36-7.42 mm, the height of 5.0-5.1 mm and the mass of 1.05-1.00 g is embedded in the gas pipeline and is in small clearance fit with the gas pipeline. The secondary filter screen 6 is wound and molded into a column structure by adopting molybdenum wires with the diameter phi of 0.20mm, and a single filter screen with the outer diameter phi of 7.36 mm-7.42 mm, the height of 5.0 mm-5.1 mm and the mass of 1.15 g-1.20 g is embedded in the gas pipeline and is in small clearance fit with the gas pipeline. The structure of the filter screen is schematically shown in figure 2. The compression ring 7 is made of 1Cr17Ni2 material and is of an annular structure, the compression ring is embedded in the gas pipeline, assembly stress is generated by the installation plug 8 to compress the second-stage filter screen and the first-stage filter screen, and the second-stage filter screen and the first-stage filter screen are compressed and then closely matched with the gas pipeline 4 without gaps. The plug 8 is arranged at the outlet thread of the gas pipeline, and the grain diameter of the gas solid particles output from the outlet direction of the plug is less than 10 um.
After the assembly of the lateral force solid fuel gas generator is completed, the igniter is electrified, the igniter fires to ignite the fuel charge, the fuel gas pipeline controls the fuel charge to stably burn according to the design to generate fuel gas, the fuel gas is initially filtered by the first-stage filter screen and is finely filtered by the second-stage filter screen to provide clean fuel gas for the steering engine, and finally, lateral force is generated. The particle size of the solid residue in the fuel gas after two-stage filtration is less than 10 mu m by determination.
Claims (1)
1. A lateral force solid gas generator, characterized in that the lateral force solid gas generator comprises: the ignition device comprises an ignition tool, a combustion chamber, a charge, a gas pipeline, a primary filter screen, a secondary filter screen, a compression ring and a plug; the ignition tool is in threaded connection with the combustion chamber, the combustion chamber is in threaded connection with the gas pipeline, and the charge is freely filled in the combustion chamber and is fixed by the ignition support and the medicine baffle plate; the plug is arranged at the outlet thread of the gas pipeline, and when the gas generator is used with the steering engine, the plug is not adopted; the inlet of the gas pipeline is provided with a throat, the middle position of the throat is provided with an installation space of a primary filter screen, a secondary filter screen and a compression ring, and the outlet end of the throat is provided with an external interface thread; the primary filter screen and the secondary filter screen are sequentially arranged in the gas pipeline and are compressed and fixed by a compression ring; the primary filter screen is wound and molded into a cylindrical porous structure by adopting molybdenum wires with the diameter phi of 0.25mm, the outer diameter phi of the primary filter screen is 7.36 mm-phi 7.42mm, the height is 5.00 mm-5.10 mm, the mass is 1.00 g-1.05 g, and the pressure difference between two ends of the primary filter screen is actually measured to be 250 Pa-300 Pa by adopting a maximum bubble pressure method; the secondary filter screen is a cylindrical porous structure formed by winding and die-pressing molybdenum wires with the diameter phi of 0.20mm, the outer diameter phi of the secondary filter screen is 7.36 mm-phi 7.42mm, the height is 5.00 mm-5.10 mm, the mass is 1.15 g-1.20 g, and the pressure difference between two ends of the secondary filter screen is actually measured to be 300 Pa-350 Pa by adopting a maximum bubble pressure method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038437.9A CN109236497B (en) | 2018-09-06 | 2018-09-06 | Lateral force solid gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038437.9A CN109236497B (en) | 2018-09-06 | 2018-09-06 | Lateral force solid gas generator |
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| Publication Number | Publication Date |
|---|---|
| CN109236497A CN109236497A (en) | 2019-01-18 |
| CN109236497B true CN109236497B (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811038437.9A Active CN109236497B (en) | 2018-09-06 | 2018-09-06 | Lateral force solid gas generator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282971B (en) * | 2020-10-29 | 2021-08-10 | 西安航天动力研究所 | Solid gas starter for gas self-pressurization |
| CN112525016A (en) * | 2020-12-22 | 2021-03-19 | 湖北航天化学技术研究所 | Gas generating device and driving device |
| CN113996125B (en) * | 2021-10-15 | 2022-11-22 | 湖北三江航天红林探控有限公司 | Cross-section type filtering device for high-energy hair burner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2497582C2 (en) * | 2011-11-18 | 2013-11-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный аграрный университет" | Gas generator |
| CN106224670A (en) * | 2016-10-08 | 2016-12-14 | 湖北三江航天红林探控有限公司 | A kind of shock resistance anti-loosing type high-temperature sealing device |
| JP2017007456A (en) * | 2015-06-19 | 2017-01-12 | 日本化薬株式会社 | Gas generator |
| CN106481457A (en) * | 2016-10-28 | 2017-03-08 | 西安近代化学研究所 | A kind of solid gas starter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1478554A4 (en) * | 2002-02-26 | 2007-03-21 | Automotive Systems Lab | Airbelt inflator |
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- 2018-09-06 CN CN201811038437.9A patent/CN109236497B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2497582C2 (en) * | 2011-11-18 | 2013-11-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный аграрный университет" | Gas generator |
| JP2017007456A (en) * | 2015-06-19 | 2017-01-12 | 日本化薬株式会社 | Gas generator |
| CN106224670A (en) * | 2016-10-08 | 2016-12-14 | 湖北三江航天红林探控有限公司 | A kind of shock resistance anti-loosing type high-temperature sealing device |
| CN106481457A (en) * | 2016-10-28 | 2017-03-08 | 西安近代化学研究所 | A kind of solid gas starter |
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| CN109236497A (en) | 2019-01-18 |
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