CN110030116B - Semi-membrane type ignition module capable of achieving single or multiple ignition, suction and extrusion, working method and igniter filling method - Google Patents
Semi-membrane type ignition module capable of achieving single or multiple ignition, suction and extrusion, working method and igniter filling method Download PDFInfo
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- CN110030116B CN110030116B CN201811522659.8A CN201811522659A CN110030116B CN 110030116 B CN110030116 B CN 110030116B CN 201811522659 A CN201811522659 A CN 201811522659A CN 110030116 B CN110030116 B CN 110030116B
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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
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
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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
- F02K9/95—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements
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Abstract
A working method of a semi-membrane type ignition module capable of being ignited, sucked and extruded once/repeatedly and an ignition agent filling method are characterized in that a semi-membrane is adopted to isolate a gas source of a storage tank from an ignition agent, and the effective volumes of vacuumizing and nitrogen replacement can be accurately controlled by adjusting the pressure difference at two ends of the semi-membrane and changing the volume proportion of the gas source to an ignition agent containing cavity; the semi-membrane pressure difference is adjusted to change the volume of the igniter accommodating cavity, the igniter is filled under the action of negative pressure suction, and the filling of the igniter with a single filling interface and the accurate quantitative control of the filling speed and the filling amount of the igniter are realized; by the scheme of configuring the three-way assembly integrated diaphragm valve and the filling interface, after filling is completed, the volume of the gas source is replaced by nitrogen, so that an air cushion and gas protection are formed, and the storage and transportation safety of the ignition module is improved. The invention effectively realizes the compatible design of single and multiple ignition modules, simplifies the ignition agent filling process, controls the filling process more accurately, and improves the safety and reliability of storage, transportation and use of the ignition module.
Description
Technical Field
The invention relates to a suction extrusion semi-membrane type ignition module capable of igniting for one time/multiple times, a working method and an igniter filling method, belongs to the field of liquid rocket engine overall structure design, and is particularly suitable for designing an ignition device of a liquid rocket engine with multiple starting requirements.
Background
The ignition device based on the chemical ignition agent is widely applied to the liquid rocket engine, and the chemical ignition agent has strong activity and high ignition reliability. The existing chemical ignition agent ignition device is of a sleeve type structure, and is a way that high-pressure nitrogen directly extrudes the ignition agent to fill a pipeline. Nitrogen in the sleeve type ignition device is directly contacted with an ignition agent, and the ignition agent is mixed with the nitrogen to cause the filling volume deviation of an ignition pipeline, so that the flow speed and the flow distribution of the ignition agent in the ignition process are uneven, and the stability of the ignition process is influenced. In addition, the sleeve-type ignition module is designed for one-time use, and can not realize multiple times of filling of the ignition agent, so that the use requirements of a single-time ignition module and a multiple-time ignition module can not be met.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to meet the use requirements of miniaturization and repeated ignition of an ignition module of a liquid oxygen/kerosene engine and overcome the defects of the prior art, the ignition module provided with a reusable suction extrusion semi-membrane type adopts a flexible composite semi-membrane to isolate an ignition agent cavity and an extrusion gas source cavity in a storage box, and adjusts the turning position of the semi-membrane by controlling the differential pressure of the semi-membrane to form negative pressure suction effect, thereby accurately and quantitatively controlling the ignition agent filling process; based on the integrated design of the diaphragm valve and the filling interface, repeated filling of a single filling port for many times and the miniaturized design of an ignition module are realized, and the requirements of single and repeated ignition are met.
The technical solution of the invention is as follows: a single/multiple ignition, suction, extrusion, semi-membrane ignition module comprising: the ignition device comprises a pressurized gas source inlet, a gas circuit filling and discharging interface, a gas source cavity, a composite semi-membrane, an ignition agent cavity, an ignition agent filling and discharging interface, an ignition agent outlet and an ignition agent storage box;
the ignition agent storage box comprises an air source cavity and an ignition agent cavity; the gas source cavity and the ignition agent cavity are isolated by the composite semi-membrane, and the volume ratio of the gas source cavity and the ignition agent cavity can be changed by adjusting the pressure difference at the two ends of the composite semi-membrane; the air source cavity can be filled with a pressurized air source through a pressurized air source inlet at one end of the ignition agent storage box; the gas path filling and discharging interface can fill or discharge gas so as to adjust the gas pressure of the gas source cavity; after the ignition agent is filled, performing nitrogen replacement on gas in the gas source cavity through the gas path filling and discharging interface to enable the gas source cavity to form an air cushion so as to realize nitrogen protection;
the booster gas source inlet and the igniter outlet are respectively provided with a diaphragm valve, and when the igniter is filled, the booster gas source inlet and the igniter outlet are respectively provided with a diaphragm valve which is in a closed state to respectively seal the gas source cavity and the igniter cavity; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniter outlet is opened by the pressure of the igniter in the igniter cavity;
the ignition agent cavity can be filled or discharged with the ignition agent and gas through the ignition agent filling and discharging interface, and the ignition agent outlet is used for discharging the ignition agent when the ignition module works;
the volume of the igniter containing cavity is changed by adjusting the pressure difference between two ends of the semi-membrane to form negative pressure suction, the igniter is sucked from the igniter filling and discharging interface to realize the filling of the igniter, and the accurate quantitative control requirements of the igniter filling speed and the igniter filling amount are met by controlling the air source suction pressure of the air path filling and discharging interface.
When the igniter is filled in the igniter cavity, the pressurizing air source inlet and the igniter outlet are both provided with diaphragm valves which are in a closed state, and the pressurizing air source inlet and the igniter outlet are respectively sealed; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniting agent outlet is opened by the pressure of the igniting agent in the igniting agent cavity
The volume ratio of the air source cavity and the igniter cavity is changed by adjusting the pressure difference between the two ends of the semi-membrane, so that the air source cavity and the igniter cavity can be controlled to be respectively vacuumized.
In the step (1), the composite semi-membrane for the igniter storage box is of a rubber-plastic composite flexible structure, is compatible with the igniter, isolates an igniter cavity from a gas source cavity, and has the capability of being turned over for many times;
before the ignition agent is filled, the gas source cavity and the ignition agent cavity are vacuumized and replaced by nitrogen, and the semi-membrane turnover is realized by controlling the pressure difference between the gas source cavity and the ignition agent cavity.
The volume of the igniter accommodating cavity can adjust the turning position of the semi-membrane through pressure difference, so that the turning of the semi-membrane forms a negative pressure suction effect, and the filling speed and the filling amount of the igniter can be controlled quantitatively.
The nitrogen replacement means that after filling is finished, the ignition agent storage tank pressurization air cavity is replaced by nitrogen to form the nitrogen protection and air cushion effect.
The diaphragm valve is arranged at the inlet of the pressurized air source and is arranged between the inlet of the pressurized air source and the filling and discharging interface of the air path; a diaphragm valve at the inlet of the pressurized air source is used as a sealing structure of the ignition module, and an air source cavity is sealed in the process of filling the ignition agent;
the membrane valve is arranged at the igniter outlet and is arranged between the igniter outlet and the igniter filling and discharging interface; and the diaphragm valve at the igniter outlet is used as a sealing structure of the igniter module, and the igniter cavity is sealed in the igniter filling process.
When the ignition module works, the booster air source extrudes the diaphragm valve arranged at the inlet of the booster air source, and then the composite semi-membrane is extruded, so that the ignition agent in the ignition agent cavity breaks through the diaphragm valve at the outlet of the ignition agent, and then enters an external pipeline connected with the outlet of the ignition agent.
The diaphragm valve at the inlet of the pressurized gas source is closed, gas at the inlet of the pressurized gas source cannot enter the gas source cavity, and the gas filling and discharging interface of the gas path filling and discharging interface is not influenced to fill or discharge the gas source cavity.
The three paths of the three-way component are respectively the igniter outlet, the opening end of the igniter cavity and the igniter filling and discharging interface, when the diaphragm valve at the igniter outlet is closed, the diaphragm valve at the igniter outlet seals the igniter outlet, and the igniter filling and discharging interface is not influenced to fill or discharge the igniter or gas from the igniter cavity.
The pressurized air source inlet, the three-way component and the diaphragm valve are integrated into a whole; the gas path filling and discharging interface is of a detachable structure; the gas path filling and discharging interface can realize vacuum pumping, nitrogen replacement and ignition agent filling.
The ignition module can be compatible with the requirements of single ignition and multiple times of ignition, namely the use requirements of multiple ignition engines, and the ignition agent filling and discharging interface is connected with the external high-capacity ignition agent storage tank, namely the main tank, so that the automatic quantitative filling and extrusion of the ignition agent required by the multiple ignition processes are realized.
An igniter filling method capable of igniting, sucking and extruding a semi-membrane type ignition module once/repeatedly comprises the following steps:
(1) the gas path filling and discharging interface is connected with an external gas path filling tool, and the ignition agent filling and discharging interface is connected with an external ignition agent filling tool;
(2) the gas path filling and discharging interface is filled with nitrogen, and the pressure of the gas source cavity is P1The igniter filling discharge outlet is filled with nitrogen, and the pressure of the igniter cavity is P2，P1＞P2；
(3) Pressure difference delta P between two sides of composite semi-membraneg＝P1-P2Extruding the mixture to be tightly attached to the inner wall of an igniter cavity, and carrying out vacuumizing and nitrogen replacement operation three times through an igniter filling and discharging interface;
(4) the igniter filling and discharging interface is communicated with an igniter filling storage tank through an external igniter filling tool, and the pressure P of the igniter filling storage tank3(P3＝P2) By adjusting the pressure P of the gas source cavity1So that P is1＜P2At a pressure difference Δ Pd＝P3-P1Under the action of the igniter, the composite semi-membrane starts to slowly turn over to the air source cavity, and the igniter is sucked into the igniter cavity from the igniter filling and discharging interface;
(5) volume flow V for igniting agent injectiond(unit m)3S) is the pressure difference DeltaPd＝P3-P1And the local temperature T, i.e. Vd＝F(P3-P1T) by controlling the source chamber pressure P1The opening and closing of the filling process and the filling flow of the ignition agent can be accurately controlled;
(6) in the process of filling the ignition agent, nitrogen in the gas source cavity is discharged from the gas path filling and discharging interface, the discharged gas is discharged through a pipeline of an external gas path filling tool, and the pipeline is inserted into a flask containing silicon oil to isolate air;
(7) when no bubble emerges from the silicone oil flask, indicating that the filling of the igniter is finished, removing the external igniter way filling tool, and assembling the igniter filling and discharging interface seal and the fastener;
(8) after filling, the composite semi-membrane is tightly attached to the inner wall of the air source cavity, vacuumizing and nitrogen replacement are carried out three times through the air path filling discharge interface and the external air path filling tool, and finally the pressure of the air source cavity is maintained to be P4(P4 is less) as an air cushion.
(9) And (4) removing the external gas circuit filling tool, assembling the gas circuit filling and discharging interface seal and the fastener, and finishing the igniter filling process.
The working method of the suction extrusion semi-membrane type ignition module capable of igniting once/many times comprises the following steps:
(1) at working pressure P5The high-pressure gas enters from the pressurized gas source inlet of the ignition module and breaks a diaphragm valve at the pressurized gas source inlet (the diaphragm valve breaks pressure P)m＜P5) Extruding the composite semi-membrane;
(2) the composite semi-membrane extrudes the igniter and breaks the igniter outlet diaphragm valve (burst pressure P)mm＜P5) And the ignition agent is extruded out from the ignition agent outlet and enters an external ignition supply pipeline to finish the work of the ignition module.
Compared with the prior art, the invention has the beneficial effects that:
(1) the ignition module adopts the flexible composite semi-membrane to isolate the ignition agent cavity and the extrusion gas source cavity in the storage box, thereby avoiding the problems of filling volume deviation of an ignition pipeline and uneven distribution of flow rate and flow of the ignition agent caused by direct contact of nitrogen and the ignition agent in the sleeve type ignition device.
(2) According to the invention, the semi-membrane turnover position is adjusted by controlling the semi-membrane pressure difference, so that a negative pressure suction effect is formed, and the filling process of the ignition agent is accurately and quantitatively controlled.
(3) The invention realizes repeated filling of a single filling port and miniaturized design of an ignition module based on the integrated design of the diaphragm valve and the filling interface, and is compatible with the requirements of single and repeated ignition.
(4) The invention can effectively reduce the volume of vacuum pumping and nitrogen replacement and greatly improve the efficiency by controlling the pressure difference of the semi-membrane and adjusting the relative volume of the air cavity and the liquid cavity.
(5) After the igniter is filled, nitrogen is filled in the air cavity, so that the air cushion protection is formed, and accidents caused by leakage of the igniter due to half-film failure can be avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The invention relates to a working method of a semi-membrane type ignition module capable of single/multiple ignition, suction and extrusion and an ignition agent filling method.A semi-membrane is adopted to isolate a gas source of a storage tank from an ignition agent, and the effective volumes of vacuumizing and nitrogen replacement can be accurately controlled by adjusting the pressure difference at two ends of the semi-membrane and changing the volume proportion of the gas source to an ignition agent containing cavity; the semi-membrane pressure difference is adjusted to change the volume of the igniter accommodating cavity, the igniter is filled under the action of negative pressure suction, and the filling of the igniter with a single filling interface and the accurate quantitative control of the filling speed and the filling amount of the igniter are realized; by the scheme of configuring the three-way assembly integrated diaphragm valve and the filling interface, after filling is completed, the volume of the gas source is replaced by nitrogen, so that an air cushion and gas protection are formed, and the storage and transportation safety of the ignition module is improved. The invention effectively realizes the compatible design of single and multiple ignition modules, simplifies the ignition agent filling process, controls the filling process more accurately, and improves the safety and reliability of storage, transportation and use of the ignition module.
As shown in fig. 1, a single/multiple ignition suction squeeze half-film ignition module comprises: the ignition device comprises a pressurized gas source inlet, a gas circuit filling and discharging interface, a gas source cavity, a composite semi-membrane, an ignition agent cavity, an ignition agent filling and discharging interface, an ignition agent outlet and an ignition agent storage box;
the ignition agent storage box comprises an air source cavity and an ignition agent cavity; the gas source cavity and the ignition agent cavity are isolated by the composite semi-membrane, and the volume ratio of the gas source cavity and the ignition agent cavity can be changed by adjusting the pressure difference at the two ends of the composite semi-membrane; the air source cavity can be filled with a pressurized air source through a pressurized air source inlet at one end of the ignition agent storage box; the gas path filling and discharging interface can fill or discharge gas so as to adjust the gas pressure of the gas source cavity; after the ignition agent is filled, performing nitrogen replacement on gas in the gas source cavity through the gas path filling and discharging interface to enable the gas source cavity to form an air cushion so as to realize nitrogen protection;
the booster gas source inlet and the igniter outlet are respectively provided with a diaphragm valve, and when the igniter is filled, the booster gas source inlet and the igniter outlet are respectively provided with a diaphragm valve which is in a closed state to respectively seal the gas source cavity and the igniter cavity; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniter outlet is opened by the pressure of the igniter in the igniter cavity;
the ignition agent cavity can be filled or discharged with the ignition agent and gas through the ignition agent filling and discharging interface, and the ignition agent outlet is used for discharging the ignition agent when the ignition module works;
the volume of the igniter containing cavity is changed by adjusting the pressure difference between two ends of the semi-membrane to form negative pressure suction, the igniter is sucked from the igniter filling and discharging interface to realize the filling of the igniter, and the accurate quantitative control requirements of the igniter filling speed and the igniter filling amount are met by controlling the air source suction pressure of the air path filling and discharging interface.
When the igniter is filled in the igniter cavity, the pressurizing air source inlet and the igniter outlet are both provided with diaphragm valves which are in a closed state, and the pressurizing air source inlet and the igniter outlet are respectively sealed; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniting agent outlet is opened by the pressure of the igniting agent in the igniting agent cavity
The volume ratio of the air source cavity and the igniter cavity is changed by adjusting the pressure difference between the two ends of the semi-membrane, so that the air source cavity and the igniter cavity can be controlled to be respectively vacuumized.
In the step (1), the composite semi-membrane for the igniter storage box is of a rubber-plastic composite flexible structure, is compatible with the igniter, isolates an igniter cavity from a gas source cavity, and has the capability of being turned over for many times;
before the ignition agent is filled, the gas source cavity and the ignition agent cavity are vacuumized and replaced by nitrogen, and the semi-membrane turnover is realized by controlling the pressure difference between the gas source cavity and the ignition agent cavity.
The volume of the igniter accommodating cavity can adjust the turning position of the semi-membrane through pressure difference, so that the turning of the semi-membrane forms a negative pressure suction effect, and the filling speed and the filling amount of the igniter can be controlled quantitatively.
The nitrogen replacement means that after filling is finished, the ignition agent storage tank pressurization air cavity is replaced by nitrogen to form the nitrogen protection and air cushion effect.
The diaphragm valve is arranged at the inlet of the pressurized air source and is arranged between the inlet of the pressurized air source and the filling and discharging interface of the air path; a diaphragm valve at the inlet of the pressurized air source is used as a sealing structure of the ignition module, and an air source cavity is sealed in the process of filling the ignition agent;
the membrane valve is arranged at the igniter outlet and is arranged between the igniter outlet and the igniter filling and discharging interface; and the diaphragm valve at the igniter outlet is used as a sealing structure of the igniter module, and the igniter cavity is sealed in the igniter filling process.
When the ignition module works, the booster air source extrudes the diaphragm valve arranged at the inlet of the booster air source, and then the composite semi-membrane is extruded, so that the ignition agent in the ignition agent cavity breaks through the diaphragm valve at the outlet of the ignition agent, and then enters an external pipeline connected with the outlet of the ignition agent.
The diaphragm valve at the inlet of the pressurized gas source is closed, gas at the inlet of the pressurized gas source cannot enter the gas source cavity, and the gas filling and discharging interface of the gas path filling and discharging interface is not influenced to fill or discharge the gas source cavity.
The three paths of the three-way component are respectively the igniter outlet, the opening end of the igniter cavity and the igniter filling and discharging interface, when the diaphragm valve at the igniter outlet is closed, the diaphragm valve at the igniter outlet seals the igniter outlet, and the igniter filling and discharging interface is not influenced to fill or discharge the igniter or gas from the igniter cavity.
The pressurized air source inlet, the three-way component and the diaphragm valve are integrated into a whole; the gas path filling and discharging interface is of a detachable structure; the gas path filling and discharging interface can realize vacuum pumping, nitrogen replacement and ignition agent filling.
The ignition module can be compatible with the requirements of single ignition and multiple times of ignition, namely the use requirements of multiple ignition engines, and the ignition agent filling and discharging interface is connected with the external high-capacity ignition agent storage tank, namely the main tank, so that the automatic quantitative filling and extrusion of the ignition agent required by the multiple ignition processes are realized.
An igniter filling method capable of igniting, sucking and extruding a semi-membrane type ignition module once/repeatedly comprises the following steps:
(1) the gas path filling and discharging interface is connected with an external gas path filling tool, and the ignition agent filling and discharging interface is connected with an external ignition agent filling tool;
(2) the gas path filling and discharging interface is filled with nitrogen, and the pressure of the gas source cavity is P1The igniter filling discharge outlet is filled with nitrogen, and the pressure of the igniter cavity is P2，P1＞P2；
(3) Pressure difference delta P between two sides of composite semi-membraneg＝P1-P2Extruding the mixture to be tightly attached to the inner wall of an igniter cavity, and carrying out vacuumizing and nitrogen replacement operation three times through an igniter filling and discharging interface;
(4) the igniter filling and discharging interface is communicated with an igniter filling storage tank through an external igniter filling tool, and the pressure P of the igniter filling storage tank3(P3＝P2) By adjusting the pressure P of the gas source cavity1So that P is1＜P2At a pressure difference Δ Pd＝P3-P1Under the action of the igniter, the composite semi-membrane starts to slowly turn over to the air source cavity, and the igniter is sucked into the igniter cavity from the igniter filling and discharging interface;
(5) volume flow V for igniting agent injectiond(unit m)3S) is the pressure difference DeltaPd＝P3-P1And the local temperature T, i.e. Vd＝F(P3-P1T) by controlling the source chamber pressure P1The opening and closing of the filling process and the filling flow of the ignition agent can be accurately controlled;
(6) in the process of filling the ignition agent, nitrogen in the gas source cavity is discharged from the gas path filling and discharging interface, the discharged gas is discharged through a pipeline of an external gas path filling tool, and the pipeline is inserted into a flask containing silicon oil to isolate air;
(7) when no bubble emerges from the silicone oil flask, indicating that the filling of the igniter is finished, removing the external igniter way filling tool, and assembling the igniter filling and discharging interface seal and the fastener;
(8) after filling, the composite semi-membrane is tightly attached to the inner wall of the air source cavity, vacuumizing and nitrogen replacement are carried out three times through the air path filling discharge interface and the external air path filling tool, and finally the pressure of the air source cavity is maintained to be P4(P4 is less) as an air cushion.
(9) And (4) removing the external gas circuit filling tool, assembling the gas circuit filling and discharging interface seal and the fastener, and finishing the igniter filling process.
The working method of the suction extrusion semi-membrane type ignition module capable of igniting once/many times comprises the following steps:
(1) at working pressure P5The high-pressure gas enters from the pressurized gas source inlet of the ignition module and breaks a diaphragm valve at the pressurized gas source inlet (the diaphragm valve breaks pressure P)m＜P5) Extruding the composite semi-membrane;
(2) the composite semi-membrane extrudes the igniter and breaks the igniter outlet diaphragm valve (burst pressure P)mm＜P5) And the ignition agent is extruded out from the ignition agent outlet and enters an external ignition supply pipeline to finish the work of the ignition module.
The invention relates to a suction extrusion semi-membrane type ignition module capable of igniting for one time/multiple times, which provides starting ignition energy for a non-natural propellant engine and ensures the reliable starting of the engine. The ignition module of the present invention is characterized by comprising: the ignition device comprises a pressurized air source inlet, an air path filling and discharging interface, an air source cavity, a composite semi-membrane, an ignition agent cavity, an ignition agent filling and discharging interface, an ignition agent outlet and an ignition agent storage box.
The igniter storage box comprises an air source cavity and an igniter cavity, and the air source cavity and the igniter cavity are isolated by a composite semi-membrane. When the ignition module is filled, the gas path filling and discharging interface is connected with an external gas path filling tool and pointThe fire agent filling and discharging interface is connected with an external fire agent filling tool by controlling the pressure (P) of the gas path1) And ignition circuit pressure (P)2) Adjusting to meet the pressure difference (delta P ═ P) between two ends of the semi-membrane1-P2) The volume of the igniter containing cavity is changed to form negative pressure suction, the igniter is sucked from the igniter filling and discharging interface to realize the filling of the igniter, and the accurate quantitative control requirements of the igniter filling speed and the igniter filling amount are met by controlling the air source suction pressure of the air path filling and discharging interface. After the ignition agent is filled, the gas in the gas source cavity is replaced by nitrogen through the gas path filling and discharging interface, so that the gas source cavity forms an air cushion and provides nitrogen protection.
The pressurized air source inlet and the igniter outlet are respectively provided with a diaphragm valve, and when the igniter is filled, the diaphragm valves arranged on the pressurized air source inlet and the igniter outlet are in a closed state to respectively seal the air source cavity and the igniter cavity. When the ignition module is assembled on the engine, the inlet of the pressurized air source is connected with the high-pressure nitrogen cylinder through a pipeline, and the outlet of the ignition agent is connected with the combustion chamber of the engine through a pipeline. After receiving the ignition command, high-pressure nitrogen (P)w1) The pressurized air source inlet diaphragm valve is broken, and the semi-membrane is extruded from the air source cavity, so that the ignition agent breaks the ignition agent path diaphragm valve and enters an engine pipeline to finish the starting ignition work.
Setting the volume of the igniter cavity as VmDensity ρ of ignition agent, and rate V of ignition agent injection at the time of injectioninThe time t for filling the igniting agent is the volume V of the igniting agentmAnd the pressure difference Δ P, i.e. t ═ f (V)mΔ P). Ignition agent removal rate V during operationoutThe minimum flow area of the igniting agent cavity is A, and the burst pressure P of the booster air source inlet diaphragm valvegIgnition agent outlet diaphragm valve cracking pressure PmHalf membrane turnover pressure difference PfFlow resistance P of ignition agent outlet engine pipelineh。
In order to ensure the safety and reliability of the igniter filling process, the igniter filling speed is required to meet the following requirements:
0.1m/s≤Vin＝Vm/(A·f(Vm，△P))≤0.15m/s
to achieve reliable starting, 10M is requiredPa＞Pw1>(2Pg+Pf) And the ignition agent exclusion time satisfies:
0.1ms≤t＝f(Vm，Pw1-Pf-Ph)≤0.2ms
the preferred scheme is as follows:
(1) the volume of the selected ignition agent storage tank is preferably 450ml, the diameter of a cylindrical section of the selected ignition agent storage tank is preferably 200mm, and the inner diameter of a filling and discharging interface integrated by the gas path and the ignition agent path is 6 mm;
(2) the drift diameter of the pressurized air source inlet is 6mm, and the preferred drift diameter of the ignition agent outlet is 4 mm;
(3) a diaphragm valve is integrated at the inlet of the pressurized air source, and the preferred rupture pressure is 2 +/-0.2 MPa;
(4) a diaphragm valve is integrated at an igniter outlet, and the rupture pressure is preferably 2 +/-0.2 MPa;
(5) the half-film inversion pressure is preferably 0.1 MPa.
On the special filling tool for the ignition agent, the filling process of the invention is tested, and the processes of vacuumizing, nitrogen replacement and filling are tested by controlling the pressure difference to adjust the half-membrane turnover. Because the semi-membrane turnover is controlled, the vacuum pumping and nitrogen replacement volume can be effectively reduced, the operation process is reduced from original 60s to 5s, and the filling efficiency of the ignition agent is greatly improved. The pressure difference between two ends of the semi-membrane is preferably controlled to be 0.5MPa in the igniting agent filling process, the igniting filling time is preferably 300s, the corresponding igniting agent filling speed is preferably 0.12m/s, the filling process is smoothly carried out, and the filling safety requirement is met.
The ignition module adopts the flexible composite semi-membrane to isolate the ignition agent cavity and the extrusion gas source cavity in the storage box, thereby avoiding the problems of filling volume deviation of an ignition pipeline and uneven distribution of the flow rate and the flow of the ignition agent caused by direct contact of nitrogen and the ignition agent in a sleeve type ignition device; the turning position of the semi-membrane is adjusted by controlling the semi-membrane pressure difference to form a negative pressure suction effect, so that the igniter filling process is accurately and quantitatively controlled. The invention realizes repeated filling of a single filling port and miniaturized design of an ignition module based on the integrated design of the diaphragm valve and the filling interface, and is compatible with the requirements of single and repeated ignition. The relative volumes of the air cavity and the liquid cavity are adjusted by controlling the pressure difference of the semi-membrane, so that the volumes of vacuumizing and nitrogen displacement can be effectively reduced, and the efficiency is greatly improved. After the igniter is filled, nitrogen is filled in the air cavity, so that the air cushion protection is formed, and accidents caused by leakage of the igniter due to half-film failure can be avoided.
Claims (1)
1. A single/multiple ignition, suction, extrusion, semi-membrane ignition module comprising: the ignition device comprises a pressurized gas source inlet, a gas circuit filling and discharging interface, a gas source cavity, a composite semi-membrane, an ignition agent cavity, an ignition agent filling and discharging interface, an ignition agent outlet and an ignition agent storage box;
the ignition agent storage box comprises an air source cavity and an ignition agent cavity; the gas source cavity and the ignition agent cavity are isolated by the composite semi-membrane, and the volume ratio of the gas source cavity and the ignition agent cavity can be changed by adjusting the pressure difference at the two ends of the composite semi-membrane; the air source cavity can be filled with a pressurized air source through a pressurized air source inlet at one end of the ignition agent storage box; the gas path filling and discharging interface can fill or discharge gas so as to adjust the gas pressure of the gas source cavity; after the ignition agent is filled, performing nitrogen replacement on gas in the gas source cavity through the gas path filling and discharging interface to enable the gas source cavity to form an air cushion so as to realize nitrogen protection;
the booster gas source inlet and the igniter outlet are respectively provided with a diaphragm valve, and when the igniter is filled, the booster gas source inlet and the igniter outlet are respectively provided with a diaphragm valve which is in a closed state to respectively seal the gas source cavity and the igniter cavity; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniter outlet is opened by the pressure of the igniter in the igniter cavity;
the ignition agent cavity can be filled or discharged with the ignition agent and gas through the ignition agent filling and discharging interface, and the ignition agent outlet is used for discharging the ignition agent when the ignition module works;
the volume of an igniter containing cavity is changed by adjusting the pressure difference between two ends of a half membrane to form negative pressure suction, the igniter is sucked from an igniter filling and discharging interface to realize the filling of the igniter, and the accurate quantitative control requirements of the igniter filling speed and the igniter filling amount are met by controlling the air source suction pressure of an air path filling and discharging interface;
when the igniter is filled in the igniter cavity, the pressurizing air source inlet and the igniter outlet are both provided with diaphragm valves which are in a closed state, and the pressurizing air source inlet and the igniter outlet are respectively sealed; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniter outlet is opened by the pressure of the igniter in the igniter cavity;
the volume ratio of the air source cavity and the igniter cavity is changed by adjusting the pressure difference between the two ends of the semi-membrane, so that the air source cavity and the igniter cavity can be controlled to be respectively vacuumized;
the composite semi-membrane for the igniter storage box is of a rubber-plastic composite flexible structure, is compatible with the igniter, isolates an igniter cavity from a gas source cavity, and has the capability of being turned over for many times;
before the ignition agent is filled, vacuumizing and nitrogen replacing are carried out on the gas source cavity and the ignition agent cavity, and semi-membrane overturning is realized by controlling the pressure difference of the gas source cavity and the ignition agent cavity;
the volume of the igniter accommodating cavity can adjust the turning position of the semi-membrane through pressure difference, so that the turning of the semi-membrane is realized to form a negative pressure suction effect, and the igniter filling speed and the igniter filling amount can be controlled in a quantized mode;
the nitrogen replacement means that after the filling is finished, the ignition agent storage tank pressurization air cavity is replaced by nitrogen to form the nitrogen protection and air cushion effect;
the diaphragm valve is arranged at the inlet of the pressurized air source and is arranged between the inlet of the pressurized air source and the filling and discharging interface of the air path; a diaphragm valve at the inlet of the pressurized air source is used as a sealing structure of the ignition module, and an air source cavity is sealed in the process of filling the ignition agent;
the membrane valve is arranged at the igniter outlet and is arranged between the igniter outlet and the igniter filling and discharging interface; a diaphragm valve at the igniter outlet is used as a sealing structure of the igniter module, and the igniter cavity is sealed in the igniter filling process;
the ignition agent filling mode capable of igniting and sucking the extruded semi-membrane type ignition module once/repeatedly comprises the following specific steps:
the gas path filling and discharging interface is connected with an external gas path filling tool, and the ignition agent filling and discharging interface is connected with an external ignition agent filling tool;
the gas path filling and discharging interface is filled with nitrogen, and the pressure of the gas source cavity is P1The igniter filling discharge outlet is filled with nitrogen, and the pressure of the igniter cavity is P2，P1＞P2；
Pressure difference delta P between two sides of composite semi-membraneg＝P1-P2Extruding the mixture to be tightly attached to the inner wall of an igniter cavity, and carrying out vacuumizing and nitrogen replacement operation three times through an igniter filling and discharging interface;
the igniter filling and discharging interface is communicated with an igniter filling storage tank through an external igniter filling tool, and the pressure P of the igniter filling storage tank3，P3＝P2By adjusting the pressure P of the gas source cavity1So that P is1＜P2At a pressure difference Δ Pd＝P3-P1Under the action of the igniter, the composite semi-membrane starts to slowly turn over to the air source cavity, and the igniter is sucked into the igniter cavity from the igniter filling and discharging interface; before the ignition agent is filled, vacuumizing and nitrogen replacing are carried out on the gas source cavity and the ignition agent cavity, and semi-membrane overturning is realized by controlling the pressure difference of the gas source cavity and the ignition agent cavity;
setting volume flow V for igniting agent fillingdIs the pressure difference DeltaPd＝P3-P1And the local temperature T, i.e. Vd＝F(P3-P1T) by controlling the source chamber pressure P1The opening and closing of the filling process and the filling flow of the ignition agent can be accurately controlled;
in the process of filling the ignition agent, nitrogen in the gas source cavity is discharged from the gas path filling and discharging interface, the discharged gas is discharged through a pipeline of an external gas path filling tool, and the pipeline is inserted into a flask containing silicon oil to isolate air; when the igniter is filled in the igniter cavity, the pressurizing air source inlet and the igniter outlet are both provided with diaphragm valves which are in a closed state, and the pressurizing air source inlet and the igniter outlet are respectively sealed; when the ignition module works, the diaphragm valve at the inlet of the pressurized gas source is opened by the pressure of the pressurized gas; the diaphragm valve at the igniter outlet is opened by the pressure of the igniter in the igniter cavity;
when no bubble emerges from the silicone oil flask, indicating that the filling of the igniter is finished, removing the external igniter way filling tool, and assembling the igniter filling and discharging interface seal and the fastener;
after filling, the composite semi-membrane is tightly attached to the inner wall of the air source cavity, vacuumizing and nitrogen replacement are carried out three times through the air path filling discharge interface and the external air path filling tool, and finally the pressure of the air source cavity is maintained to be P4As an air cushion;
dismantling the external gas circuit filling tool, assembling the gas circuit filling and discharging interface seal and the fastener, and finishing the igniter filling process;
when the semi-film type ignition module capable of single/multiple ignition, suction and extrusion works, the pressure is P5The high-pressure gas enters from the pressurized gas source inlet of the ignition module, and after the diaphragm valve at the pressurized gas source inlet is broken through by extrusion, the diaphragm valve breaks pressure Pm＜P5Extruding the composite semi-membrane; the diaphragm valve is arranged at the inlet of the pressurized air source and is arranged between the inlet of the pressurized air source and the filling and discharging interface of the air path; a diaphragm valve at the inlet of the pressurized air source is used as a sealing structure of the ignition module, and an air source cavity is sealed in the process of filling the ignition agent; the membrane valve is arranged at the igniter outlet and is arranged between the igniter outlet and the igniter filling and discharging interface; a diaphragm valve at the igniter outlet is used as a sealing structure of the igniter module, and the igniter cavity is sealed in the igniter filling process;
the composite semi-membrane extrudes the igniter and breaks the igniter outlet diaphragm valve to a rupture pressure Pmm＜P5The ignition agent is extruded out from an ignition agent outlet and enters an external ignition supply pipeline to finish the work of an ignition module;
setting the volume of the igniter cavity as VmDensity ρ of ignition agent, and rate V of ignition agent injection at the time of injectioninThe time t for filling the igniting agent is the volume V of the igniting agentmAnd the pressure difference Δ P, i.e. t ═ f (V)mΔ P); ignition agent removal rate V during operationoutThe minimum flow area of the igniting agent cavity is A, and the burst pressure P of the booster air source inlet diaphragm valvegIgnition agent outlet diaphragm valve cracking pressure PmHalf membrane turnover pressure difference PfFlow resistance P of ignition agent outlet engine pipelineh；
In order to ensure the safety and reliability of the igniter filling process, the igniter filling speed is required to meet the following requirements:
0.1m/s≤Vin＝Vm/(A·f(Vm，△P))≤0.15m/s
to achieve reliable starting, 10MPa > P is requiredw1>(2Pg+Pf) And the ignition agent exclusion time satisfies:
0.1ms≤t＝f(Vm，Pw1-Pf-Ph)≤0.2ms。
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| CN110407655B (en) * | 2019-07-23 | 2020-09-15 | 西安航天动力研究所 | Low-temperature fuel-based chemical ignition device and method |
| CN110410233B (en) * | 2019-07-23 | 2020-08-18 | 西安航天动力研究所 | Multi-component packaging type igniter |
| CN112284658B (en) * | 2020-09-17 | 2023-02-14 | 沈阳航天新光集团有限公司 | Method for enhancing vibration resistance of non-metal diaphragm storage tank and test method |
| CN112211750B (en) * | 2020-10-19 | 2021-12-14 | 北京天兵科技有限公司 | Rocket engine ignition agent storage and supply device |
| CN112594094B (en) * | 2020-12-18 | 2022-03-04 | 西安航天动力研究所 | Engine starting ignition device and ignition method based on preinstalled intermediate medium |
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