CN109253029A - A kind of plasma igniter with flaring grounding electrode export structure - Google Patents
A kind of plasma igniter with flaring grounding electrode export structure Download PDFInfo
- Publication number
- CN109253029A CN109253029A CN201811258745.2A CN201811258745A CN109253029A CN 109253029 A CN109253029 A CN 109253029A CN 201811258745 A CN201811258745 A CN 201811258745A CN 109253029 A CN109253029 A CN 109253029A
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- China
- Prior art keywords
- grounding electrode
- anode
- air inlet
- flaring
- positioning sleeve
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Classifications
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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
- F02P23/00—Other ignition
- F02P23/04—Other physical ignition means, e.g. using laser rays
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/48—Generating plasma using an arc
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
Abstract
The invention discloses a kind of plasma igniters with flaring grounding electrode export structure, including center anode, orificed anode, grounding electrode, insulating positioning sleeve, air inlet a, air inlet b, air inlet inclined hole；The upper one end of grounding electrode is provided with air inlet a diagonally downward, air inlet b diagonally downward is located at the top other end of grounding electrode, and the air inlet a, air inlet b are connected with ionization space a；In the lower end of the center anode, several air inlet inclined holes circumferentially, diagonally downward are provided with, the high activity gas for will be formed in a small amount of ionization space b introduces air duct.Due to using flaring grounding electrode export structure, be conducive to arc discharge generation and flame acceleration.
Description
Technical field
The present invention relates to a kind of plasma igniter, it is specifically a kind of with flaring grounding electrode export structure etc.
Gas ions igniter.
Background technique
Natural gas is used as engine fuel as a kind of clean energy resource extensively.In power train in vehicle application field, it is with CNG
The passenger car and load-carrying vehicle of fuel are increasing；In ship power field, CNG and LNG powered ship has become " made in China
Focus on research direction in 2025 " planning.Compared with gasoline, the natural gas as gaseous fuel needs bigger ignition energy,
This causes to be difficult with single spark ignitor natural gas the natural gas used for automobile engine of small cylinder diameter in actual use, because
This has to make engine work in such a way that gasoline ignites.Which results in system complex, costs to increase, under reliability
A series of problems, such as drop.Therefore, it is necessary to take novel ignition technology, using relatively simple structure, the height of natural gas is realized
Effect igniting and burning enable natural gas engine to stablize under single-fuel mode, reliable work.
Traditional engine spark plug configuration as shown in Figure 1, in structure generally by a central electrode and with its distance
Closer one or several lateral electrode compositions.When work, ignition coil is the power supply of center electrode, and voltage is up to ten thousand volts of 1.5-2.?
Under High Pressure Difference between contre electrode and lateral electrode, gas is breakdown, shape in the small space between central electrode and lateral electrode
At high temperature discharge channel, igniting and burning start.
The shortcomings that prior art are as follows: (1) existing spark plug easily leads to ignition energy utilization rate often with very high temperature rise
It is low and influence electrode life；(2) ignition range is only located at the small space between central electrode and lateral electrode, is applied to large-diameter
Engine or when being not easy fuel (such as natural gas) lighted, igniting less reliable is easily led to since ignition energy is too small.
Summary of the invention
For solve existing thermal equilibrium plasma igniter technical solution applied on the engine of large space burning room and
Ignition energy is small when applying on natural gas engine, igniting poor reliability, the problems such as ignition energy utilization rate is low, and the application provides
A kind of plasma igniter with flaring grounding electrode export structure.
To achieve the above object, the technical solution of the application are as follows: it is a kind of with flaring grounding electrode export structure it is equal from
Daughter igniter, including center anode, orificed anode, grounding electrode, insulating positioning sleeve, air inlet a, air inlet b, air inlet are oblique
Hole, the center anode are up-thin-low-thick column, which has hollow structure, which is air duct；
The insulating positioning sleeve is located in grounding electrode, and described orificed anode one end is put in the wall body of insulating positioning sleeve, orificed anode
The other end is exposed outside；The taper end portion of the center anode is located in insulating positioning sleeve centre bore, the butt end position of center anode
In the lower part of grounding electrode；An ionization space a, the butt end of center anode are formed between SI semi-insulation positioning sleeve and grounding electrode
Form an insulating space between portion upper end and grounding electrode, the section of the insulating space be it is trapezoidal, under the thick end of center anode
An ionization space b is formed between end and grounding electrode, the ionization space a, insulating space are connected with ionization space b；It is connecing
The upper one end of ground electrode is provided with air inlet a diagonally downward, and the top that air inlet b diagonally downward is located at grounding electrode is another
One end, the air inlet a, air inlet b are connected with ionization space a；In the lower end of the center anode, be provided with circumferentially,
Several air inlet inclined holes diagonally downward, the high activity gas for will be formed in a small amount of ionization space b introduce air duct.
Further, the application further includes insulating positioning sleeve pressing plate, between dead earth electrode and insulating positioning sleeve
Relative position.
Further, the application further includes anode fixture nut, between center anode and insulating positioning sleeve, the sun
Pole fixture nut is used with center anode and is threadedly coupled.
Further, form a boss between the taper end portion and thick end of center anode, for limit center anode and absolutely
The relative position of edge positioning sleeve.
Further, the center anode is located at plasma igniter center.
Further, the grounding electrode lower part is equipped with one for installing the locating flange of the plasma igniter.
Further, the thin top end of the center anode is exposed outside.
Due to using the technology described above, can obtain following technical effect: this programme uses dielectric impedance to the present invention
Electric discharge-arc discharge combined discharge mode, can the lean flammability limit of nonequilibrium plasma is wide, reactivity is big, and
The advantages such as the operating air pressure height of thermal equilibrium plasma combine, and reach and realize high energy, steady within the scope of wide fuel air ratio
Pinpoint the purpose of fire；Moreover, because the fuel and air for igniting are passed through by air inlet, it is indoor mixed main burning is not needed
It closes gas to flow backwards, therefore can be according to ignition conditions using the side of air of the control through air inlet a and the fuel flow rate through air inlet b
Method control is located at the equivalent proportion of gaseous mixture in ionization space a and ionization space b, and reaching improves ionization and igniting according to actual condition
The purpose of effect.Meanwhile it being passed through a small amount of air in the lower anode with hollow structure, it can be reached for electrode cooling, and right
The flow field of nozzle generates disturbance to improve the effect of burning.Moreover, because using flaring grounding electrode export structure, favorably
In arc discharge generation and flame acceleration.
Detailed description of the invention
Fig. 1 is engine spark plug configuration schematic diagram traditional in background technique；
Fig. 2 is the cross-sectional view of the application；
Ignition control strategy figure when Fig. 3 is applied to internal combustion engine；
Ignition control strategy figure when Fig. 4 is applied to other engines and burner；
Fig. 5 is the top view of the application；
Number explanation in figure: 1, grounding electrode；2, center anode；3, orificed anode；4, insulating positioning sleeve pressing plate；5, anode
Fixture nut；6, air inlet b；7, insulating positioning sleeve；8, locating flange；9, air inlet inclined hole；10, ionization space b；11, isolation is empty
Between；12, ionization space a；13, air inlet a.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments: doing as example to the application
Further description explanation.
As shown in Figs. 1-5, the present embodiment provides a kind of plasma igniter with flaring grounding electrode export structure,
Including including center anode, orificed anode, grounding electrode, anode fixing bolt, insulating positioning sleeve and insulating positioning sleeve pressing plate；Institute
It states center anode and is located at plasma igniter center, with hollow structure, be mounted in anodized insulation set, structure
For up-thin-low-thick column, centre has a boss for limiting the relative position of center anode and anodized insulation set；Described
The lower end of center anode is provided with several air inlet inclined holes circumferentially, diagonally downward, for will be formed in a small amount of ionization space b
High activity gas introduce cooling air channel；The orificed anode is installed on the outside of center anode by insulating positioning sleeve；Institute
It states grounding electrode and passes through insulating positioning sleeve fixed center anode and orificed anode；The anode fixing bolt be located at center anode with
Between insulating positioning sleeve, uses and be threadedly coupled with center anode；The insulating positioning sleeve pressing plate for fix insulating positioning sleeve and
The relative position of grounding electrode；There are two air inlets for setting on the grounding electrode, are respectively used to be passed through air and fuel, described
Two air inlets and grounding electrode are in arrangement that is tangential and tilting down respectively, and downward eddy flow is generated in ionization space a
Position can appropriate adjustment according to actual needs；There is a positioning for being used to install the plasma igniter in the grounding electrode lower end
Flange.According to actual needs, which also can be set in upper grounding electrode.
Center anode and orificed anode are powered respectively by power supply；When work, one is passed through by air inlet a and air inlet b respectively
Quantitative air and fuel；At this point, power supply is first using lower voltage as orificed anode power supply (such as: 10,000 volts or less), at this time in
Heart electrode no power；At the lower voltage, dielectric barrier discharge, position occurs between orificed anode-insulating positioning sleeve-grounding electrode
It is ionized under DC Electric Field in the air and fuel mixture of ionization space a, generate free electron and has positive charge
The nonequilibrium plasma of cation composition, chemical reactivity improve.
Since air inlet a and air inlet b are continually fed into air and fuel.Air inlet a and air inlet b and grounding electrode are tangential
It arranges and tilts down, therefore the air and fuel that are passed through form downward eddy flow in ionization space a；With higher reaction
Active nonequilibrium plasma flows through contraction accelerating sections and enters ionization space b, and air inlet a and air inlet b is closed at this time.It is cyclic annular
Anodal opening, power supply with higher voltage (such as: ten thousand volts of 1.5-2) be center anode supply.Electricity is grounded under action of high voltage
Arc discharge occurs between pole and center anode.While center anode is powered, the cooling air channel in center anode is logical
Enter air, this partial air is not involved in ionization reaction, and role is to cool down for electrode, and generate disturbance to the flow field of nozzle
To improve burning.Since the air in cooling air channel is in electroneutral, combustion reaction can be inhibited to a certain extent, therefore few
The high activity gas formed in amount ionization space b is entered in cooling air channel by air inlet inclined hole, to properly increase cooling
Air activity in air duct, promotes combustion reaction to carry out；Since the reactivity of gaseous mixture at this time has improved, point
Fire and combustion reaction occur rapidly.Using flaring grounding electrode export structure, be conducive to arc discharge generation, and flame will
Accelerate to go out from spout in the form of large volume flame torch, into engine chamber, igniting, it is indoor flammable to be located at burning
Air and fuel mixture.
Specifically, the control method of above-mentioned igniter includes control method on piston-mode motor, starts at other
The control method of machine and burner；
(1) control method on piston-mode motor (reciprocating or rotary piston) specifically: crank position sensing
Device judges crank position, if current crank angle does not arrive setting value, continues to judge；If having arrived setting value, by ECU to power supply
Output low pressure discharge instruction.
After power supply is connected to electric discharge instruction, a certain lower voltage U1 is exported to orificed anode, is denoted as time t1.At this point, cyclic annular
Anode and grounding electrode discharge, and form dielectric barrier discharge in ionization space a, the gas in ionization space a is ionized
At nonequilibrium plasma.It is moved downward with that is, being ionized gas, enters ionization space b by insulating space through the Δ t time.
In t1+ time Δt, low pressure discharge instruction is terminated, orificed anode power-off.At this point, ECU exports electrion to power supply
Instruction, power supply export a certain high voltage U2 (U2 > U1) to center anode.At this point, center anode and grounding electrode discharge, in electricity
From arc discharge is formed in the b of space, the nonequilibrium plasma in ionization space b with very high reaction activity is ignited,
Combustion reaction starts.Due to using flaring grounding electrode export structure, be conducive to arc discharge generation, and flame will be with big
The form acceleration of volume flame torch is gone out from spout, enters main chamber.While center anode is discharged, ECU output control
Instruction, is passed through air to the air duct of center anode, and cooling for center anode, this partial air goes out spout, to flame
Jet flow field generates disturbance, promotes combustion efficiency.
ECU reads cylinder pressure sensor signal.If cylinder presses p to be greater than a certain setting value p1, then it is assumed that light a fire successfully, ECU continues
CRANK SENSOR is read, subsequent cycle igniting is carried out.If cylinder presses p to be less than p1, then it is assumed that loss of ignition, at this time ECU
It to power source output command, is discharged with U2+ Δ U center anode, while increasing the fuel flow rate entered through air inlet, and after resuming studies
Cylinder is taken to press signal, until lighting a fire successfully；If when discharge voltage increases to always setting value U3 (U3 > U2) or fuel stream
Amount still judges loss of ignition when increasing to a certain setting value, and to guarantee that ignitor terminates safely electric discharge, this circulation is no longer lighted a fire.
(2) in the control method of other engines and burner specifically: ECU issues low pressure discharge instruction to power supply.Electricity
After source is connected to electric discharge instruction, a certain lower voltage U1 is exported to orificed anode, is denoted as time t1.At this point, orificed anode and ground connection
Electrode discharge forms dielectric barrier discharge in ionization space a, and the gas in ionization space a is ionized to non-equilibrium etc.
Gas ions.It is moved downward with that is, being ionized gas, enters ionization space b by insulating space through the Δ t time.
In t1+ time Δt, low pressure discharge instruction is terminated, orificed anode power-off.At this point, ECU exports electrion to power supply
Instruction, power supply export a certain high voltage U2 (U2 > U1) to center anode.At this point, center anode and grounding electrode discharge, in electricity
From arc discharge is formed in the b of space, the nonequilibrium plasma in ionization space b with very high reaction activity is ignited,
Combustion reaction starts.Due to using flaring grounding electrode export structure, be conducive to arc discharge generation, and flame will be with big
The form acceleration of volume flame torch is gone out from spout, enters main chamber.While center anode is discharged, ECU output control
Instruction, is passed through air to the air duct of center anode, and cooling for center anode, this partial air goes out spout, to flame
Jet flow field generates disturbance, promotes combustion efficiency.
ECU reads temperature sensor signal, obtains burning room temperature T.If temperature T is greater than a certain setting value T1, then recognize
To light a fire successfully, electrion instruction immediately is terminated, and center anode power-off, ignition process terminates.If temperature T is less than T1, recognize
For loss of ignition, ECU discharges center anode to power source output command with U2+ Δ U at this time, while increasing and entering through air inlet
Fuel flow rate, and continue read temperature signal, until lighting a fire successfully；If when discharge voltage increases to always setting value U3
Loss of ignition is still judged when (U3 > U2) or when fuel flow rate increases to a certain setting value, is put to guarantee that ignitor terminates safely
Electricity, and export failure alarm signal.
The protection scope of the invention is not limited thereto, and anyone skilled in the art is in the present invention
It creates in the technical scope disclosed, the technical solution and its inventive concept created according to the present invention are subject to equivalent substitution or change,
It should all cover within the protection scope of the invention.
Claims (7)
1. a kind of plasma igniter with flaring grounding electrode export structure, which is characterized in that including center anode, ring
Shape anode, grounding electrode, insulating positioning sleeve, air inlet a, air inlet b, air inlet inclined hole, the center anode are up-thin-low-thick
Column, the column have hollow structure, which is air duct；The insulating positioning sleeve is located at grounding electrode
In, described orificed anode one end is put in the wall body of insulating positioning sleeve, and the orificed anode other end is exposed outside；The center anode
Taper end portion be located in insulating positioning sleeve centre bore, the thick end of center anode is located in the lower part of grounding electrode；SI semi-insulation
An ionization space a is formed between positioning sleeve and grounding electrode, forms one between the thick end upper end of center anode and grounding electrode
Insulating space, the section of the insulating space are trapezoidal, one ionization of formation between the thick end lower end of center anode and grounding electrode
Space b, the ionization space a, insulating space are connected with ionization space b；The upper one end of grounding electrode is provided with inclination
Downward air inlet a, air inlet b diagonally downward are located at the top other end of grounding electrode, the air inlet a, air inlet b with
Ionization space a is connected；In the lower end of the center anode, several air inlet inclined holes circumferentially, diagonally downward are provided with, are used for
The high activity gas formed in a small amount of ionization space b is introduced into air duct.
2. a kind of plasma igniter with flaring grounding electrode export structure, feature exist according to claim 1
In the application further includes insulating positioning sleeve pressing plate, for the relative position between dead earth electrode and insulating positioning sleeve.
3. a kind of plasma igniter with flaring grounding electrode export structure, feature exist according to claim 1
In the application further includes anode fixture nut, and between center anode and insulating positioning sleeve, the anode fixture nut is in
Heart-yang pole is using threaded connection.
4. a kind of plasma igniter with flaring grounding electrode export structure, feature exist according to claim 1
In a boss being formed between the taper end portion of center anode and thick end, for limiting the opposite of center anode and insulating positioning sleeve
Position.
5. a kind of plasma igniter with flaring grounding electrode export structure, feature exist according to claim 1
In the center anode is located at plasma igniter center.
6. a kind of plasma igniter with flaring grounding electrode export structure, feature exist according to claim 1
In the grounding electrode lower part is equipped with one for installing the locating flange of the plasma igniter.
7. a kind of plasma igniter with flaring grounding electrode export structure, feature exist according to claim 1
In the thin top end of the center anode is exposed outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258745.2A CN109253029A (en) | 2018-10-26 | 2018-10-26 | A kind of plasma igniter with flaring grounding electrode export structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258745.2A CN109253029A (en) | 2018-10-26 | 2018-10-26 | A kind of plasma igniter with flaring grounding electrode export structure |
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| Publication Number | Publication Date |
|---|---|
| CN109253029A true CN109253029A (en) | 2019-01-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811258745.2A Withdrawn CN109253029A (en) | 2018-10-26 | 2018-10-26 | A kind of plasma igniter with flaring grounding electrode export structure |
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| CN (1) | CN109253029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024079322A1 (en) * | 2022-10-13 | 2024-04-18 | Graforce Gmbh | Plasma electrode assembly and plasma analysis device |
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| CN1556564A (en) * | 2003-12-31 | 2004-12-22 | 天津大学 | Ultra high energy spark plug |
| CN101761940A (en) * | 2009-12-15 | 2010-06-30 | 上海中科清洁能源技术发展中心 | Non-equilibrium thermodynamics plasma igniting and combustion-supporting device |
| JP2011134636A (en) * | 2009-12-25 | 2011-07-07 | Denso Corp | High-frequency plasma ignition device |
| CN102980204A (en) * | 2012-11-27 | 2013-03-20 | 哈尔滨工程大学 | Fuel-atomizing integrated igniter |
| CN104779524A (en) * | 2014-12-30 | 2015-07-15 | 大连理工大学 | Dielectric barrier discharge non-equilibrium plasma spark plug for internal combustion engine |
| CN105783028A (en) * | 2014-12-24 | 2016-07-20 | 上海齐耀热能工程有限公司 | Burner ignition device and high-energy igniter |
| CN106438158A (en) * | 2016-11-07 | 2017-02-22 | 中国人民解放军空军工程大学 | Main combustion chamber of aviation engine based on plasma jet ignition combustion |
-
2018
- 2018-10-26 CN CN201811258745.2A patent/CN109253029A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556564A (en) * | 2003-12-31 | 2004-12-22 | 天津大学 | Ultra high energy spark plug |
| CN101761940A (en) * | 2009-12-15 | 2010-06-30 | 上海中科清洁能源技术发展中心 | Non-equilibrium thermodynamics plasma igniting and combustion-supporting device |
| JP2011134636A (en) * | 2009-12-25 | 2011-07-07 | Denso Corp | High-frequency plasma ignition device |
| CN102980204A (en) * | 2012-11-27 | 2013-03-20 | 哈尔滨工程大学 | Fuel-atomizing integrated igniter |
| CN105783028A (en) * | 2014-12-24 | 2016-07-20 | 上海齐耀热能工程有限公司 | Burner ignition device and high-energy igniter |
| CN104779524A (en) * | 2014-12-30 | 2015-07-15 | 大连理工大学 | Dielectric barrier discharge non-equilibrium plasma spark plug for internal combustion engine |
| CN106438158A (en) * | 2016-11-07 | 2017-02-22 | 中国人民解放军空军工程大学 | Main combustion chamber of aviation engine based on plasma jet ignition combustion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024079322A1 (en) * | 2022-10-13 | 2024-04-18 | Graforce Gmbh | Plasma electrode assembly and plasma analysis device |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190122 |
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