CN112160849A - Electrode device for electric control solid rocket engine - Google Patents
Electrode device for electric control solid rocket engine Download PDFInfo
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- CN112160849A CN112160849A CN202011056088.0A CN202011056088A CN112160849A CN 112160849 A CN112160849 A CN 112160849A CN 202011056088 A CN202011056088 A CN 202011056088A CN 112160849 A CN112160849 A CN 112160849A
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- electrode
- conductive
- rocket engine
- explosive column
- column
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention relates to an electric control solid rocket engine, in particular to an electrode device for the electric control solid rocket engine. The electrode A and the electrode B are positioned on the same plane and are spirally and alternately nested together, so that the shortest current path exists at each position on the surface of the explosive column; the conductive device comprises a conductive column, an insulating sleeve and a fixing nut, and the three parts are uniformly bonded through high-temperature-resistant glue to realize the intercommunication between the external conductive circuit and the internal electrode; the electrode positioning device is additionally provided with an insulation limiting recess and a corresponding release channel, so that the decomposed and generated fuel gas can be effectively released and the explosive column can be positioned after the electrode is electrified. The decomposition is ensured to only occur at one end of the explosive column, the starting voltage is only related to the distance between the electrodes and is not influenced by the diameter and the thickness of the electrically controlled propellant explosive column. In the conductive mode, the heat transfer to the outside is reduced.
Description
Technical Field
The invention relates to an electric control solid rocket engine, in particular to an electrode device for the electric control solid rocket engine.
Background
The electric control solid engine is a new concept engine which can regulate and control the combustion state through voltage. The positive and negative electrodes act on the surface of the electrically controlled solid propellant. Under the condition that the electrodes are conductive, the electrically-controlled solid propellant is pyrolyzed/electrolyzed to generate gas, and then the gas is combusted in the combustion chamber; and under the condition that the electrode is powered off, the decomposition of the electric control solid propellant is stopped, and the combustion is finished.
At present, two electrode configurations of the electric control solid engine at home and abroad are available: coaxial cylindrical electrodes and double-ended electrodes, as shown in fig. 1, 2. The coaxial cylindrical electrode consists of an electrode A, an electrode B, an insulating coating layer and the like. The electrode A and the electrode B are arranged coaxially in a cylindrical shape, and a circular-ring-shaped explosive column is filled between the electrodes. At the initial state, the insulating coating layer is slightly lower than the electrode B, so that a conductive loop exists between the electrode A and the electrode B. After the operation, the insulating coating layer is moved backwards along with ablation, so that a conductive loop is always arranged between the electrode A and the electrode B; the double-end-face electrode comprises an electrode A, an electrode B, a spring and the like, wherein the electrode A and the electrode B are planar and are respectively arranged at two ends of the electrically-controlled propellant grain. The electrode B end is conducted through the spring contacted with the electrode B end. As the charge is consumed, the electrode B moves forward under the elastic force of the spring. The electrode a is fixed at a terminal through which external electric energy is introduced.
The electrode device of the existing electric control solid engine has certain problems in two schemes.
(1) One end of the coaxial electrode B is always positioned in a combustion area, and the temperature of the other end is increased due to the heat conduction of metal along with the increase of working time. The insulation and sealing failure of the joint can be caused by long-time high temperature; the distance between the electrodes A and B influences the starting voltage of the electric control solid engine to a certain extent, and the starting voltage is increased along with the increase of the thickness of the propellant; the electrolysis area is not only on the end face of the propellant, but also on the wall surface close to the electrode A, so that the structural integrity of the explosive column is damaged; in the actual working process, the ablation rule of the insulating coating layer is uncontrollable.
(2) And the electrode B moves forwards gradually under the action of the spring along with the consumption of the electrically-controlled propellant. Because the electrode B and the conductive spring are in contact conduction, the surface of the electrode B and the conductive spring have the risk of being oxidized and ablated by fuel gas in the working process, and finally the contact resistance of the electrode B and the conductive spring is increased, even the electrode B and the conductive spring are insulated and not conducted; when conducting electricity, the end faces of the explosive columns contacted with the two electrodes are decomposed to a certain degree; the distance between the electrodes affects the starting voltage of the electronically controlled solid state engine to a certain extent, and the starting voltage increases with increasing propellant height. The starting voltage is changed along with the consumption of the explosive column in the working process, so that the complexity of control is increased; the electrodes form a conductive loop inside the charge, causing thermal decomposition inside the charge.
Disclosure of Invention
Technical problem to be solved
The invention provides an electrode device of an electric control solid rocket engine, which solves the technical problems of high decomposition voltage of the current electrode, separation of a decomposition surface and a combustion surface, and high requirements on system insulativity and conductivity.
Technical scheme adopted for solving technical problem
An electrode device of an electric control solid rocket engine comprises an electrode A, an electrode B, a conducting device and an electrode positioning device:
the electrode A and the electrode B are positioned on the same plane and are spirally and alternately nested together, so that the shortest current path is ensured to exist at each position on the surface of the explosive column;
the conductive device comprises a conductive column, an insulating sleeve and a fixing nut, and the three parts are uniformly bonded through high-temperature-resistant glue to realize the intercommunication between the external conductive circuit and the internal electrode;
the electrode positioning device is additionally provided with an insulation limiting recess and a corresponding release channel, so that the decomposed and generated fuel gas can be effectively released and the explosive column can be positioned after the electrode is electrified.
Further, the electrode A and the electrode B are arranged on the same side of the grain, so that the grain decomposition is ensured to be only carried out on one side of the grain.
Further, the electrode positioning device is in a sieve pore shape.
Further, the material of the electrode is a high-temperature resistant titanium alloy.
Furthermore, the conductive column is made of copper, the insulating sleeve is a high-silica die-pressed product, and the fixing nut is a steel product.
Further, the electrode positioning device should have sufficient mechanical strength.
Furthermore, the electrode device and the external conducting mode based on the high-temperature alloy thin spring can avoid the problem that the sealing glue is overheated and fails due to the fact that the heat of the electrode is transmitted outwards during decomposition, and can weaken the requirements of processing, mounting and positioning.
The invention has the advantages of
The invention provides a positive and negative staggered spiral single-end-face electrode, wherein both electrodes are arranged on a combustion side, so that the decomposition is only carried out at one end of a grain, the starting voltage is only related to the distance between the electrodes, and the influence of the diameter and the thickness of an electric control propellant grain is avoided. And the electrode terminal is far away from the decomposition-combustion area and is not directly contacted with decomposition-combustion products, and is finally connected with the external conductive column through the spring, so that the requirement on processing precision is low, and the assembly is simple. Meanwhile, the heat transferred outwards is reduced by the conductive mode.
Drawings
FIG. 1: a coaxial cylindrical electrode;
FIG. 2: a double-ended electrode;
fig. 3 (a): a schematic three-dimensional structure diagram of a single-end-face electrode;
fig. 3 (b): a schematic plane structure diagram of the single-end-face electrode;
FIG. 4: a schematic view of an electrode conducting means;
FIG. 5: the electrode is arranged on an electric control solid engine;
FIG. 6: schematic diagram of an electrode positioning device.
Wherein: 1. the electrode comprises an electrode A, an electrode B, a fixed limiting end, a conductive column 5, a fixed nut 6, an insulating sleeve 7, a conductive device 8, a conductive spring 9, a grain 10, an engine shell 11, an electrode positioning device 12, an electrode protective sleeve 13 and a limiting concave 14.
Detailed Description
The invention relates to a single-end-face electrode device for an electric control engine. The electrode devices are all arranged on one side of the explosive column to ensure that decomposition only occurs on one side of the explosive column. The positive electrode and the negative electrode can adjust the starting voltage by adjusting the distance between the positive electrode and the negative electrode, and are not influenced by the size change of the explosive column in the working process of the electric control engine. The spring is adopted to conduct electricity with the outside, so that heat transmitted outwards from the electrode is reduced. The whole electrode device improves the ignition performance and the safety of the electric control engine.
The invention is described in further detail below with reference to the figures and examples.
As shown in figure 3, the electrode A and the electrode B are arranged on the same plane, and the two electrodes are spirally nested together in a staggered manner, so that the shortest current path exists at each position on the surface of the grain. The conductive end is far away from the action plane of the electrode and the explosive column. The material of the electrode is high-temperature resistant titanium alloy. The two electrodes are fixed on the electrode positioning device, and the fixed limit ends of the electrodes are embedded in the limit recesses on the electrode positioning device.
As shown in fig. 4, the conductive means makes the external conductive traces connect with the internal electrodes. Consists of three parts. The conductive column, the insulating sleeve and the fixing nut are bonded through high-temperature-resistant glue, and the bonding requirement is uniform. The conductive column is made of copper, the insulating sleeve is a high silica die-molded product, and the fixing nut is a steel product.
As shown in fig. 5, which is a schematic view of the electrode device installed on an electrically controlled engine, the conductive device is in contact with the conductive ends of the electrodes a and B through the thin springs to realize the conduction of electric energy. The thin spring material is high-temperature alloy, so that the problem of overheating and failure of the sealant caused by outward transmission of electrode heat during decomposition can be avoided, and the requirements of processing, mounting and positioning can be further weakened. In order to prevent the direct contact of high-temperature fuel gas and a conductive electrode from causing the corrosion of the conductive electrode, a heat insulation protective sleeve is additionally arranged outside the conductive electrode.
As shown in fig. 6, in order to ensure effective release of the decomposed gas and positioning of the grains after the electrodes are electrified, the electrode positioning device is additionally provided with an insulation limiting recess and a corresponding release channel. The electrode positioning device should have sufficient mechanical strength.
Claims (5)
1. An electrode assembly for an electronically controlled solid rocket engine, comprising: including electrode A and electrode B, electrically conductive device, electrode positioner:
the electrode A and the electrode B are positioned on the same plane and are spirally and alternately nested together, so that the shortest current path is ensured to exist at each position on the surface of the explosive column;
the conductive device comprises a conductive column, an insulating sleeve and a fixing nut, and the three parts are uniformly bonded through high-temperature-resistant glue to realize the intercommunication between the external conductive circuit and the internal electrode;
the electrode positioning device is additionally provided with an insulation limiting recess and a corresponding release channel, so that the decomposed and generated fuel gas can be effectively released and the explosive column can be positioned after the electrode is electrified.
2. An electrode assembly for an electrically controlled solid rocket engine according to claim 1, wherein: the electrode A and the electrode B are arranged on the same side of the explosive column, so that the decomposition of the explosive column is ensured to be only carried out on one side of the explosive column.
3. An electrode assembly for an electrically controlled solid rocket engine according to claim 1, wherein: the electrode positioning device is in a sieve pore shape.
4. An electrode device for an electrically controlled solid-rocket engine according to claim 1 or 2, wherein: the electrode A and the electrode B are made of high-temperature-resistant titanium alloy.
5. An electrode assembly for an electrically controlled solid rocket engine according to claim 1, wherein: the conductive column is made of copper, the insulating sleeve is a high silica die-molded product, and the fixing nut is a steel product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011056088.0A CN112160849A (en) | 2020-09-30 | 2020-09-30 | Electrode device for electric control solid rocket engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011056088.0A CN112160849A (en) | 2020-09-30 | 2020-09-30 | Electrode device for electric control solid rocket engine |
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| Publication Number | Publication Date |
|---|---|
| CN112160849A true CN112160849A (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011056088.0A Pending CN112160849A (en) | 2020-09-30 | 2020-09-30 | Electrode device for electric control solid rocket engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278463A (en) * | 2021-12-28 | 2022-04-05 | 哈尔滨工业大学 | Electric control solid thruster |
| CN114645800A (en) * | 2022-04-21 | 2022-06-21 | 哈尔滨工业大学 | High-thrust electric control solid thruster |
| CN115265302A (en) * | 2022-08-23 | 2022-11-01 | 南京理工大学 | Variable-power anti-riot ammunition based on electronic control combustion propellant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278463A (en) * | 2021-12-28 | 2022-04-05 | 哈尔滨工业大学 | Electric control solid thruster |
| CN114645800A (en) * | 2022-04-21 | 2022-06-21 | 哈尔滨工业大学 | High-thrust electric control solid thruster |
| CN115265302A (en) * | 2022-08-23 | 2022-11-01 | 南京理工大学 | Variable-power anti-riot ammunition based on electronic control combustion propellant |
| CN115265302B (en) * | 2022-08-23 | 2024-05-17 | 南京理工大学 | Variable-power antiriot ammunition based on electric control combustion propellant powder |
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Application publication date: 20210101 |