CN106194546A - The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope and control method thereof - Google Patents
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope and control method thereof Download PDFInfo
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- CN106194546A CN106194546A CN201610804278.3A CN201610804278A CN106194546A CN 106194546 A CN106194546 A CN 106194546A CN 201610804278 A CN201610804278 A CN 201610804278A CN 106194546 A CN106194546 A CN 106194546A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/152—Digital data processing dependent on pinking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P11/00—Safety means for electric spark ignition, not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The present invention proposes extrahigh energy single pinking igniter and the control method thereof of a kind of wide adjustable energy of scope.This device includes energy capacitance set, D.C. regulated power supply, protective resistance, DC boosting module, voltage monitoring module, ignition relay, electric discharge relay and ignition module.After this device is by storing enough energy in storage capacitor, carrying out sparks punctures the space between adjustable distance ignition electrode, it is achieved the high-energy ignition of detonating combustion and direct initiation.Compared with tradition high-energy ignition system, this apparatus structure is simple, and safety is high, and ignition energy adjustable extent is wide, and peak fire energy is up to hundreds of joule, can be applied in the pinking research field of minute yardstick with common yardstick.
Description
Technical field
The present invention relates to detonating combustion and pulse-knocking engine technical field, a kind of wide adjustable energy of scope
Extrahigh energy single pinking igniter and control method thereof.
Background technology
Pulse-knocking engine (Pulse Detonation Engine is called for short PDE) is that one utilizes batch (-type) detonation wave
Produce the new concept engine of thrust.PDE is as a kind of novel power set, and due to its simple in construction, cycle efficieny is high, work
Make the potential advantage such as wide ranges and thrust-weight ratio height, all have broad application prospects in civil and military field.And detonation wave
Initial, be one of the key of PDE research.
At present, rising of detonation wave begins to change (Deflagration to by direct initiation and deflagration to pinking
Detonation Transition, be called for short DDT) mode realize.Owing to DDT can initiate deflagration with relatively low energy
Ripple, therefore it is widely adopted in pinking is studied.But the barrier used during DDT can cause the biggest flow resistance, thus produces
The natural disposition loss of energy, the research of Cooper et al. is pointed out, for being not added with the mixture that barrier can detonate, adds meeting after barrier
Specific impulse is caused to decline about 25% (Cooper, M., Jackson, S., Austin, J., et al.Direct Experimental
Impulse Measurements for Detonations and Deflagrations[J].Journal of
Propulsion and Power,2002,18(5):1033-1041.).Detonation wave, direct initiation is obtained with respect to DDT
Performance loss is less, but the highest to the demand of ignition energy.Owing to it is conventional electric spark to the demand of huge ignition energy
Ignition system institute is unappeasable, and therefore the direct initiation experimentation for PDE is the most extensively carried out.At present, grind in experiment
In studying carefully, it is achieved the mode of direct initiation mainly includes the means such as pre-explosion pipe, explosive and shock wave focus, these methods and electric spark
Igniting is compared, and operation complexity, safety is low, and it is bigger to take up room.Therefore, in order to carry out directly rising for PDE further
Quick-fried experimentation, exploitation novel high-energy ignition system has the biggest necessity.
According to the research of Chen Chao et al., in the actual application of pulse-knocking engine, high-energy ignition is relative to traditional
Sparking mode advantageously reduces time delay, shortens the deflagration transition distance to pinking, and can obtain some other performance
On raising.Meanwhile, if the stoichiometric ratio of reactant is suitable, then there is an ignition energy adapted to most with it, permissible
Make deflagration minimum to the transition distance of pinking.(Chen Chao, Zhao Gang, He Liming. high-energy ignition static, flowing sky-combustion gaseous mixture grinds
Study carefully [J]. air force engineering college journal (natural science edition), in December, 2006, the 6th phase of volume 7).Therefore, ignition energy for
The work of PDE has an important impact, and its relation with PDE service behaviour is also one of emphasis of research.But, at present
The ignition energy scope that high energy ignition unit is available for regulating mostly is narrower, and device attainable peak fire energy is relatively low, difficult
To be used in detonating combustion field, more it is not used to carry out the experimentation of direct initiation.Therefore, develop and a can provide wider
The high energy ignition unit of ignition energy scope and higher maximum ignition energy has important meaning for the experimentation of detonating combustion
Justice.
Summary of the invention
Solve the technical problem that
In engine research based on detonating combustion, formation and the propagation of pinking are had significant effect by ignition energy,
Direct relation the performance of pulse-knocking engine.For fill up detonating combustion field width scope, scalable, superenergy igniting
Blank, the problem not simultaneously being suitable for detonation engine field in order to solve tradition high energy ignition unit, the present invention devises one
Plant structurally simple, economical practicality, safe and reliable extrahigh energy igniter, and research and propose its safe handling side for pinking
Method.Simultaneously, it is considered to the actual demand of detonating combustion research, this patent is lighted a fire mainly for single.Use in the present invention designed
High energy ignition unit, and according to correct operating procedure, wider point in conventional yardstick and minute yardstick pinking experiment can be carried out
The single direct initiation of gaseous fuel mixture and high-energy ignition in fire energy range.
The technical scheme is that
A kind of extrahigh energy single pinking igniter of the wide adjustable energy of scope, including accumulator and ignition module, its
It is characterised by: the two poles of the earth of accumulator are connected with the two-stage of ignition module respectively, according to required ignition energy regulation energy storage electricity
The charging interval on road and ignition module ignition electrode spacing, after the energy stored by accumulator reaches rated value, connect wherein
Relay, the air gap between perforation ignition module ignition electrode, cause energy capacitance set electric discharge, releasing energy, light can be quick-fried
Mixture.
Described accumulator includes that energy capacitance set, D.C. regulated power supply, protective resistance, DC boosting module, voltage are supervised
Survey module, ignition relay and electric discharge relay, charge circuit, ignition circuit can be divided into and discharge and pressure measurement loop, three
Person all includes energy capacitance set, parallel relationship the most each other；In charge circuit, one end of energy capacitance set by protective resistance and
DC boosting module is connected with D.C. regulated power supply positive pole, and one end is connected with D.C. regulated power supply negative pole, acting as of this loop,
Charge for energy capacitance set before electric discharge；In ignition circuit, one end of energy capacitance set is by ignition relay and igniting mould
Block is connected, and the other end is then directly connected with ignition module, acting as of this loop, after energy capacitance set reaches rated voltage,
Release energy, light a fire；In electric discharge with pressure measurement loop, electric discharge relay is directly connected on energy capacitance set two ends, is used for
Discharge residual charge in energy capacitance set after igniting or before maintenance, protect user safety, and voltage monitoring module is the most direct
It is connected to energy capacitance set two ends, energy capacitance set voltage condition can be monitored in real time.
Described energy capacitance set uses high voltage thin film electric capacity, and total capacitance of capacitance group is more than or equal to 1.1 μ F, rated voltage
20kV, the capacitance of single electric capacity is about 0.1 μ F；Capacitance group uses row's formula parallel-connection structure, and each independent electric capacity can arbitrarily be installed and tear open
Unload, easy to maintenance；According to experiment demand, can arbitrarily increase and decrease electric capacity quantity, thus increase and decrease maximum electric discharge gross energy.
The voltage of described D.C. regulated power supply is adjustable, and the interval of voltage-regulation is 0～15V, and rated current is 1A, can basis
Demand, in safety range, suitably increases voltage to realize quick charge.
Described DC boosting module use voltage-doubling boost design, its rated current is 0.5mA, adjustable voltage scope be 0～
30kV, according to(in formula, Q is energy, and C is capacitor's capacity, and U is voltage) formula note is calculated, in conjunction with hereinbefore capacitance group
Capacitance, the peak fire energy of this device is up to hundreds of joule, far above conventional ignition device, it is adaptable to most gaseous fuels
Can quick-fried mixture；DC boosting inside modules has anti-reverse protection, high-low pressure insulation blocking；Compared with traditional transformer boosting,
Have that simple in construction, volume be little, safety advantages of higher.
Total resistance of described protective resistance is more than or equal to 50M Ω, if can use a resistance or being made up of a dry resistant series,
Current reflux bigger during for preventing electric discharge makes D.C. regulated power supply and DC boosting module produce destruction.
Described voltage monitoring module is a wide range, highly sensitive high-tension voltmeter, for the electricity of monitoring energy storage in real time
The voltage of appearance group, in order to discharge in time or cut off the electricity supply.
Described ignition relay and electric discharge relay are nomal closed type vacuum high-pressure relay, use relay as opening
Closing, user only needs by the relatively low circuit steering electric magnet of voltage to control the break-make of high-tension circuit, thus is effectively ensured and makes
The personal safety of user.
Described ignition module includes two ignition electrode, screw plug and corresponding pinking tube heads being mutually perpendicular to place
Portion；Axially ignition electrode is fixed at detonation tube end wall by screw plug, and radially ignition electrode is inserted by the hole of detonation tube sidewall
In pipe and fixing with on sidewall, the needle point of two pieces of ignition electrodes is respectively positioned on the axis of detonation tube, the distance between ignition electrode needle point
Can be adjusted by spiral plug.
In circuit, each relay is in normally open, and charge circuit uses D.C. regulated power supply power and pass through direct current liter
Charge for energy capacitance set after die block boosting, after voltage monitoring module display energy capacitance set voltage reaches rated value, cut
Disconnected D.C. regulated power supply, and connect ignition relay, now ignition module electric discharge is lighted a fire, and after igniting terminates, connects electric discharge
Relay, dump energy in release energy capacitance set.
In charging process, need to slowly improve the output voltage of D.C. regulated power supply, uprush to storage capacitor reducing electric current
The adverse effect of group.
Beneficial effect
The extrahigh energy igniter detonated for detonating combustion and the control method thereof of present invention offer are provided, use screw thread
Plug fixed ignition pin, can effectively solve sealing and the ventilation problem of circular pipe；Realize the wide-voltage range 0～20kV
Inside lighting a fire, the ignition energy of its correspondence is 0～220J, solves from low-yield to the problem of high-energy ignition, and energy covers
Lid scope is wide, may be used for studying the ignition mechanism under various energy；Use relay as switch and low-pressure end protection device,
Employing multiple protective mechanism, as much as possible ensures personnel and equipment safety while improving operation stability.
Accompanying drawing explanation
The system schematic of Fig. 1: the present invention
Fig. 2: ignition module schematic diagram
Wherein, 1-1 is D.C. regulated power supply, and 1-2 is DC boosting module, and 1-3 is protective resistance, and 1-4 is electric discharge relay
Device, 1-5 is voltage monitoring module, and 1-6 is energy capacitance set, and 1-7 is ignition relay, and 1-8 is ignition module；2-1 is axial
Ignition electrode, 2-2 is head seal bolt, and 2-3 is detonation tube front end, and 2-4 is radial direction ignition electrode.
Detailed description of the invention
Below in conjunction with instantiation and accompanying drawing, the invention will be further described:
Referring to the drawings 1, in this example, the extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope includes energy storage
Circuit and ignition module, and accumulator is by low pressure charge circuit, energy storage component, ignition circuit and electric discharge and pressure measurement loop sets
Become.
Low pressure charge circuit includes D.C. regulated power supply 1-1, DC boosting module 1-2 and protective resistance 1-3, wherein, directly
The voltage continuously adjustabe of stream regulated power supply 1-1, the interval of voltage-regulation is 0～15V.DC boosting module 1-2 uses again
Pressure boosting design, simple installation, output is stable, and volume is little, and safety is high.Protective resistance 1-3 uses total resistance more than or equal to 50M
The resistance of Ω, multiple is in series, and protective resistance 1-3 can limit DC boosting module 1-2 to energy storage electricity in charging process
The charging rate of appearance group 1-6, prevents charging rate too fast and damages electric capacity, and during discharge igniting, is possible to prevent backflow
Electric current is excessive, protects D.C. regulated power supply 1-1.
Energy storage component is energy capacitance set 1-4, uses high voltage thin film electric capacity, and total capacitance of capacitance group is more than or equal to 1.1
μ F, rated voltage 20kV, its effect is to store the energy in the high voltage direct current by the output of DC boosting module 1-2, and is putting
Energy is discharged when connecting by electricity loop, is used for lighting a fire.
Ignition circuit includes ignition relay 1-7, and is connected with ignition module 1-8.Igniting mould described in ignition module 1-8
Block includes two ignition electrode, screw plug 2-2 and corresponding detonation tube front end 2-3 being mutually perpendicular to place.Axially igniting
Pin 2-1 is fixed at detonation tube end wall by screw plug 2-2, and radially ignition electrode 2-4 inserts pipe by the hole of detonation tube sidewall
In, and be fixed on sidewall, the needle point of two pieces of ignition electrodes is respectively positioned on the axis of detonation tube, can be by adjusting screw plug 2-
2 make axial ignition electrode be axially moveable, thus change the distance of two ignition electrode needle points, and this distance is by testing required ignition energy
Amount determines.Ignition relay 1-7 is nomal closed type vacuum high-pressure relay, and it act as the switch of igniting during igniting.
Electric discharge and manometric module include discharge relay 1-4 and voltage monitoring module 1-5.Electric discharge relay 1-4 is normal off
Type vacuum high-pressure relay.Voltage monitoring module 1-5 is a wide range, highly sensitive high-tension voltmeter, for prison in real time
Survey the voltage of energy capacitance set 1-6, in order to cut off the electricity supply in time.
During work, first determine in ignition module 1-8 the distance between ignition electrode according to experiment demand, by axial ignition electrode
2-4 is fixed on the relevant position of detonation tube leading portion 2-3, the filling of flammable mixed gas in carrying out detonation tube afterwards.Flammable mixed gas is full of
After detonation tube, head seal bolt 2-2 and axial ignition electrode are fixed on detonation tube leading portion 2-3, regulate ignition electrode clearance distance.
Check that circuit is the most complete afterwards, and connect D.C. regulated power supply 1-1.In charging process, first by D.C. regulated power supply 1-1
Output voltage be adjusted to 0V, be gradually increased afterwards output voltage continuous observation voltage monitoring module 1-5 registration (i.e. energy storage electricity
Appearance group 1-4 voltage), to avoid electric current to uprush the adverse effect to energy capacitance set.When the registration of voltage monitoring module 1-5 reaches
Experiment required voltage value, charging terminates, and cuts off the output of D.C. regulated power supply 1-1, connects the power supply of ignition relay 1-7, point
Fire loop is connected.After ignition circuit is connected, under high-tension effect, air quilt between two ignition electrodes in ignition module 1-8
Puncture, form low-resistance discharge loop.Being released of energy, makes the air around spark plug gap fast because ionizing and be heated
Speed expands, and temperature drastically raises, it is achieved the purpose of high-energy ignition.After igniting terminates, electric discharge relay 1-4, release electricity can be connected
Energy remaining in holding, thus guarantee personal safety when carrying out channel check,
In this example, utilize the design of electric capacity energy storage direct discharge, it is possible to successfully to gas in wider voltage range
State fuel mixes gas and carries out utilizing the single detonating combustion of high-energy ignition to test.Owing to ignition energy is that pinking is ground on the impact of pinking
One of important content studied carefully, the present invention can promote the experimentation of detonating combustion further.
Claims (11)
1. an extrahigh energy single pinking igniter for the adjustable energy of wide scope, including accumulator and ignition module, it is special
Levy and be: the two poles of the earth of accumulator are connected with the two-stage of ignition module respectively, according to required ignition energy regulation accumulator
Charging interval and ignition module ignition electrode spacing, after the energy stored by accumulator reaches rated value, connect therein
Relay, the air gap between perforation ignition module ignition electrode, cause energy capacitance set electric discharge, release energy and light and can quick-fried mix
Compound.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: accumulator includes energy capacitance set, D.C. regulated power supply, protective resistance, DC boosting module, voltage monitoring module, point
Fire relay and electric discharge relay, can be divided into charge circuit, ignition circuit and electric discharge and pressure measurement loop, and three all includes storage
Energy capacitance group, parallel relationship the most each other；In charge circuit, protective resistance and DC boosting mould are passed through in one end of energy capacitance set
Block is connected with D.C. regulated power supply positive pole, and one end is connected with D.C. regulated power supply negative pole, and acting as of this loop is before electric discharge
Energy capacitance set is charged；In ignition circuit, one end of energy capacitance set is connected with ignition module by ignition relay, another
End is then directly connected with ignition module, and acting as of this loop after energy capacitance set reaches rated voltage, releases energy, enter
Row igniting；In electric discharge with pressure measurement loop, electric discharge relay is directly connected on energy capacitance set two ends, is used for after firing or maintenance
Residual charge in front release energy capacitance set, protects user safety, and voltage monitoring module is directly connected in energy storage electricity equally
Appearance group two ends, can monitor energy capacitance set voltage condition in real time.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
Using high voltage thin film electric capacity in: described energy capacitance set, total capacitance of capacitance group is more than or equal to 1.1 μ F, rated voltage 20kV,
The capacitance of single electric capacity is about 0.1 μ F；Capacitance group uses row's formula parallel-connection structure, each independent electric capacity can any installing/dismounting, tie up
Protect conveniently；According to experiment demand, can arbitrarily increase and decrease electric capacity quantity, thus increase and decrease maximum electric discharge gross energy.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: the voltage of described D.C. regulated power supply is adjustable, and the interval of voltage-regulation is 0～15V, and rated current is 1A, can according to demand,
In safety range, suitably increase voltage to realize quick charge.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: described DC boosting module uses voltage-doubling boost design, and its rated current is 0.5mA, and adjustable voltage scope is 0～30kV,
According to(in formula, Q is energy, and C is capacitor's capacity, and U is voltage) formula note is calculated, in conjunction with the appearance of hereinbefore capacitance group
Value, the peak fire energy of this device is up to hundreds of joule, far above conventional ignition device, it is adaptable to most gaseous fuels can be quick-fried
Mixture；DC boosting inside modules has anti-reverse protection, high-low pressure insulation blocking；Compared with traditional transformer boosting, have
Simple in construction, volume are little, safety advantages of higher.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: total resistance of described protective resistance is more than or equal to 50M Ω, if can use a resistance or being made up of a dry resistant series, is used for
Prevent from current reflux bigger when discharging from making D.C. regulated power supply and DC boosting module produce to destroy.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: described voltage monitoring module is a wide range, highly sensitive high-tension voltmeter, for monitoring energy capacitance set in real time
Voltage, in order to discharge in time or cut off the electricity supply.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: described ignition relay and electric discharge relay are nomal closed type vacuum high-pressure relay, use relay as switch, use
Person only needs by the relatively low circuit steering electric magnet of voltage to control the break-make of high-tension circuit, thus the people of user is effectively ensured
Body safety.
The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope the most according to claim 1, its feature exists
In: described ignition module includes two ignition electrode, screw plug and corresponding detonation tube heads being mutually perpendicular to place；Axle
Being fixed at detonation tube end wall to ignition electrode by screw plug, radially ignition electrode inserts in pipe by the hole of detonation tube sidewall,
And fixing with on sidewall, the needle point of two pieces of ignition electrodes is respectively positioned on the axis of detonation tube, and the distance between ignition electrode needle point is permissible
It is adjusted by spiral plug.
10. one kind uses the controlling party of the extrahigh energy single pinking igniter of the wide adjustable energy of scope described in claim 1～9
Method, it is characterised in that: in circuit, each relay is in normally open, and charge circuit uses D.C. regulated power supply power and pass through
Charge for energy capacitance set after the boosting of DC boosting module, when voltage monitoring module display energy capacitance set voltage reaches rated value
After, to cut off D.C. regulated power supply, and connect ignition relay, now ignition module electric discharge is lighted a fire, and after igniting terminates, connects
Electric discharge relay, dump energy in release energy capacitance set.
The extrahigh energy single pinking igniter controlling party of 11. a kind of wide adjustable energy of scope according to claim 10
Method, it is characterised in that: in charging process, need to slowly improve the output voltage of D.C. regulated power supply, uprush to storage reducing electric current
The adverse effect of energy capacitance group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610804278.3A CN106194546A (en) | 2016-09-06 | 2016-09-06 | The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610804278.3A CN106194546A (en) | 2016-09-06 | 2016-09-06 | The extrahigh energy single pinking igniter of a kind of wide adjustable energy of scope and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578146A (en) * | 2017-09-28 | 2019-04-05 | 中国航发商用航空发动机有限责任公司 | Adjustable igniter |
| CN110895052A (en) * | 2019-12-09 | 2020-03-20 | 珠海格力电器股份有限公司 | Liquid level monitoring method, liquid level monitoring structure, drainage device and heat exchange equipment |
| CN111456867A (en) * | 2020-04-08 | 2020-07-28 | 北京深蓝航天科技有限公司 | Ignition device suitable for simultaneous explosion of multi-channel initiating explosive devices |
| CN112378995A (en) * | 2021-01-14 | 2021-02-19 | 矿冶科技集团有限公司 | Electric spark generating device, energy testing device and electric spark generating system |
| CN112780418A (en) * | 2020-12-07 | 2021-05-11 | 西安航天动力研究所 | Shock wave focus exploder with microscale detonation wave attenuation |
| CN112922568A (en) * | 2021-01-18 | 2021-06-08 | 中石化石油工程技术服务有限公司 | Portable perforation ignition system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578146A (en) * | 2017-09-28 | 2019-04-05 | 中国航发商用航空发动机有限责任公司 | Adjustable igniter |
| CN109578146B (en) * | 2017-09-28 | 2020-03-13 | 中国航发商用航空发动机有限责任公司 | Adjustable ignition device |
| CN110895052A (en) * | 2019-12-09 | 2020-03-20 | 珠海格力电器股份有限公司 | Liquid level monitoring method, liquid level monitoring structure, drainage device and heat exchange equipment |
| CN111456867A (en) * | 2020-04-08 | 2020-07-28 | 北京深蓝航天科技有限公司 | Ignition device suitable for simultaneous explosion of multi-channel initiating explosive devices |
| CN112780418A (en) * | 2020-12-07 | 2021-05-11 | 西安航天动力研究所 | Shock wave focus exploder with microscale detonation wave attenuation |
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| CN112378995A (en) * | 2021-01-14 | 2021-02-19 | 矿冶科技集团有限公司 | Electric spark generating device, energy testing device and electric spark generating system |
| CN112922568A (en) * | 2021-01-18 | 2021-06-08 | 中石化石油工程技术服务有限公司 | Portable perforation ignition system |
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Application publication date: 20161207 |
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