CN118009351A - Gas fuel igniter based on sliding arc discharge - Google Patents
Gas fuel igniter based on sliding arc discharge Download PDFInfo
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- CN118009351A CN118009351A CN202410198087.1A CN202410198087A CN118009351A CN 118009351 A CN118009351 A CN 118009351A CN 202410198087 A CN202410198087 A CN 202410198087A CN 118009351 A CN118009351 A CN 118009351A
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- sliding arc
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- gas fuel
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- 239000000446 fuel Substances 0.000 title claims abstract description 38
- 238000010891 electric arc Methods 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000004913 activation Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000003345 natural gas Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a gas fuel igniter based on sliding arc discharge, which comprises a connecting mechanism, an insulating ceramic sleeve, a sliding arc anode, a sliding arc cathode, a rotary upper disc, a power-on coil ring and a fixed lower disc, wherein the inner wall of the sliding arc anode is in fit connection with the insulating ceramic sleeve; an electrified coil ring is arranged in an annular cavity between the periphery of the sliding arc cathode and the insulating ceramic sleeve. The upper disc and lower disc assembly is added in the sliding arc cathode, so that gas backflow caused by overlarge pressure in the combustion chamber after ignition is effectively avoided; by adopting the sliding arc plasma ignition technology, the activation energy of the gas fuel particles is increased, so that the ignition is more uniform and rapid.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a gas fuel igniter based on sliding arc discharge.
Background
The natural gas has high ignition point, good antiknock performance, clean combustion and rich reserves, and is an ideal substitute fuel for petroleum. However, natural gas also causes problems such as a decrease in engine power and a deterioration in ignition reliability when used as an engine fuel. Therefore, there is a need to develop efficient ignition devices or methods for natural gas engines, particularly large bore natural gas engines, that improve the combustion performance of the natural gas engine.
In the prior art, the application number is CN202210222927.4, which is a Chinese patent application of a natural gas engine precombustion chamber ignition device, natural gas in a gas storage tank is independently supplied into the precombustion chamber. And meanwhile, the side spark plug is used for reducing the mixture to be propelled to the engine under the condition of unburned or full combustion and improving the fuel utilization rate. However, this design requires complex combustion control and is difficult to maintain because of the complex design. The chinese patent application with application number CN202110239989.1, entitled electric spark igniter for gaseous fuel and ignition method, has several drawbacks: firstly, the parts of the igniter are too many, and the processing difficulty is high; secondly, by adopting spark ignition, the flow rate of the gas fuel needs to be controlled to ensure that the spark is not blown out, so that the reliability is poor.
Disclosure of Invention
The invention aims to provide a gas fuel igniter based on sliding arc discharge, which can quickly and uniformly ignite gas fuel in an engine by utilizing high activity of plasma.
In order to achieve the above purpose, the technical scheme of the application is as follows: the gas fuel igniter based on sliding arc discharge comprises a connecting mechanism, an insulating ceramic sleeve, a sliding arc anode, a sliding arc cathode, a rotary upper disc, a power-on coil ring and a fixed lower disc, wherein the inner wall of the sliding arc anode is in fit connection with the insulating ceramic sleeve; an electrified coil ring is arranged in an annular cavity between the periphery of the sliding arc cathode and the insulating ceramic sleeve.
Further, coupling mechanism is including the platform section, changeover portion and the cylindricality section that connect gradually, the platform section overlap joint is equipped with radial straight hole on the slip arc positive pole and in platform section bottom both sides, and limit structure that forms between platform section, changeover portion and the slip arc positive pole is used for fixed insulating ceramic sleeve, is equipped with the adapter ring in cylindricality section and slip arc negative pole junction periphery.
Further, an end cover is arranged on the connecting mechanism, one part of connecting bolts penetrate through the end cover and the platform section to extend into the sliding arc anode, and the other part of connecting bolts penetrate through the end cover to extend into the platform section.
Further, the insulating ceramic sleeve is clamped in the limiting groove of the sliding arc anode, the inner wall of the insulating ceramic sleeve extending inwards is contacted with the sliding arc cathode, and the sliding arc cathode is arranged at the trapezoid nozzle of the sliding arc anode.
Further, symmetrical through holes are axially formed in the rotary upper disc, and magnetic strips with opposite magnetism are embedded into the two radial sides of the rotary upper disc.
Further, the fixed lower disc is axially provided with symmetrical straight holes, and the straight holes penetrate through the upper top surface and the lower bottom surface of the fixed lower disc and the aperture of the straight holes gradually expands from top to bottom; the fixed lower disc is radially provided with symmetrical inclined holes, and the inclined holes penetrate through the upper top surface and the side wall of the fixed lower disc.
Further, the sliding arc cathode is provided with a first flow hole, a second flow hole and a vertical downward spray hole which are inclined downwards, the spray hole is communicated with the straight hole of the fixed lower disc, and the first flow hole and the second flow hole are communicated with the inclined hole of the fixed lower disc.
Further, three groups of coils are arranged on the electrified coil ring, and when the first group of coils are electrified, the through hole of the rotary upper disc is communicated with the straight hole of the fixed lower disc; when the second group of coils are electrified, the through holes in the rotary upper disc are communicated with the inclined holes of the fixed lower disc; when the third group of coils are electrified, the penetrating holes of the rotary upper disc are positioned on the upper wall surface of the fixed lower disc.
Further, the gas fuel is injected into the combustion chamber from the spray hole of the sliding arc cathode through the straight hole of the fixed lower disc after being introduced; after the fuel and the air in the combustion chamber are mixed, the rotary upper disc rotates under the action of magnetic force, so that the through hole of the rotary upper disc is communicated with the inclined hole of the fixed lower disc; then injecting a small amount of gas again, injecting the gas from the first flow hole and the second flow hole of the sliding arc cathode after passing through the inclined hole of the fixed lower disc, contacting the wall surface and generating rotational flow, and finally entering the sliding arc area; then the high-voltage electrode is electrified to generate a sliding arc with the electrode gap of the high-voltage electrode, and the combustion chamber gas mixture is ignited.
Further, after the ignition process is finished, the rotary upper disc rotates under the action of magnetic force, and the through hole which is turned to the rotary upper disc is not communicated with the straight hole and the inclined hole of the fixed lower disc, so that backflow caused by overlarge gas pressure of the combustion chamber is prevented.
By adopting the technical scheme, the invention can obtain the following technical effects:
1. an upper disc and lower disc assembly is added in the sliding arc cathode (nozzle), so that gas backflow caused by overlarge pressure in a combustion chamber after ignition is effectively avoided;
2. By adopting the coil ring, the linkage of the upper disc and the lower disc can be controlled on the premise of ensuring the compactness of the space in the igniter as much as possible.
3. By adopting the sliding arc plasma ignition technology, the activation energy of the gas fuel particles is increased, so that the ignition is more uniform and rapid.
Drawings
FIG. 1 is a cross-sectional view of a gas fuel igniter based on a sliding arc discharge;
FIG. 2 is a schematic diagram of a connection mechanism;
FIG. 3 is a schematic view of an adapter ring assembly position;
FIG. 4 is a cross-sectional view of a portion of the structure of a gas fuel igniter based on a sliding arc discharge;
FIG. 5 is a schematic view of a rotating upper disc;
FIG. 6 is a schematic diagram of the mating relationship of the rotating upper disc and the energized coil ring;
FIG. 7 is a front view and a side view of the fixed bottom wall;
FIG. 8 is a three-dimensional cross-sectional view of a fixed lower plate;
FIG. 9 is a two-dimensional cross-sectional view of a sliding arc cathode;
FIG. 10 is a schematic diagram of the air intake of step S1 of the embodiment;
FIG. 11 is a schematic view showing the rotation direction of the upper rotating disc in the step S2 of the embodiment;
FIG. 12 is a schematic diagram of the intake of step S3 of the embodiment;
FIG. 13 is a schematic diagram of the sliding arc plasma generation of step S4 of the embodiment;
fig. 14 is a schematic diagram showing the rotation of the upper rotating disc in step S5 of the embodiment.
Detailed Description
The principles of the present disclosure will be described below with reference to several example embodiments shown in the drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that these embodiments are merely provided to enable those skilled in the art to better understand and practice the present disclosure and are not intended to limit the scope of the present disclosure in any way.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.
As shown in fig. 1, the present embodiment provides a gas fuel igniter based on sliding arc discharge, which comprises a connection mechanism 1, an insulating ceramic sleeve 2, a sliding arc anode 3, a sliding arc cathode 4, an end cover 5, a rotating upper disc 6, an energizing coil ring 7 and a fixed lower disc 8, wherein the insulating ceramic sleeve 2 has two functions, namely, the sliding arc anode 3 and the sliding arc cathode 4 are separated, and the influence of high temperature generated in a combustion chamber below on the connection mechanism 1 is isolated, so that the high temperature deformation is prevented; the sliding arc anode 3 is connected with the high-voltage electrode, and the sliding arc cathode 4 is connected with the grounding electrode;
As shown in fig. 2, the connection mechanism 1 is made of an insulating material, and comprises a platform section, a transition section and a cylindrical section which are sequentially connected, wherein radial straight holes are drilled on two sides of the contact surface of the platform section and the insulating ceramic sleeve 2, so that the wires of the sliding arc anode, the sliding arc cathode and the electrified coil ring can all enter from the radial straight holes.
As shown in fig. 3, an adapter ring 1.1 is arranged at the connection of the cylindrical section and the sliding arc cathode 4, and the adapter ring is respectively fixed on the two components by bolts to realize component connection.
As shown in fig. 4, a part of the connecting bolts penetrate through the end cover and the platform section to extend into the sliding arc anode, and another part of the connecting bolts penetrate through the end cover to directly extend into the platform section, and meanwhile, a limiting structure formed among the platform section, the transition section and the sliding arc anode can be used for fixing the insulating ceramic sleeve.
As shown in fig. 5, the rotary upper plate 6 has a disc-shaped structure; the axial direction of the device is provided with a first through hole 61 and a second through hole 62 which are symmetrical; a first magnetic strip 63 and a second magnetic strip 64 with opposite magnetism are embedded on the two radial sides.
As shown in fig. 6, the energizing coil ring 7 is a circular ring, and three groups (one group of two) of coils are sleeved on the circular ring, and the wires of the energizing coil ring 7 pass through the radial straight hole of the connecting mechanism 1 and are connected with an external control system. The coils in the figure are denoted by letters, a and a being the first group, B and B being the second group, C and C being the third group, respectively. When the rotary upper disc 6 works, the rotary upper disc 6 is respectively rotated to three different working positions under the influence of magnetic force along with the sequential energization of the three groups of coils. When the first set of coils is energized, the first through hole 61 and the second through hole 62 of the rotating upper plate are communicated with the first straight hole 81 and the second straight hole 82 of the fixed lower plate. When the second set of coils is energized, the first through hole 61 and the second through hole 62 of the rotating upper plate are communicated with the first inclined hole 83 and the second inclined hole 84 of the fixed lower plate. When the third group of coils are energized, the first through hole 61 and the second through hole 62 of the rotary upper plate are positioned on the upper wall surface of the fixed lower plate.
As shown in fig. 7-8, the fixed lower disc 8 is a cylinder with the same size as the bottom surface of the rotating upper disc 6, a first straight hole 81 and a second straight hole 82 are axially formed in the cylinder, a first inclined hole 83 and a second inclined hole 84 are radially formed in the cylinder, the first straight hole 81 and the second straight hole 82 penetrate through the upper top surface and the lower bottom surface of the fixed lower disc, the aperture of the first straight hole 81 and the aperture of the second straight hole 82 are gradually expanded from top to bottom, the first straight hole 81 and the second straight hole 82 are communicated with the spray hole 43 of the sliding arc cathode 4, the spray hole 43 is communicated with the combustion chamber, inflow gas is communicated with the first flow hole 41 and the second flow hole 42 on the sliding arc cathode 4 through the first inclined hole 83 and the second inclined hole 84, and the first flow hole 41 and the second flow hole 42 are communicated with the sliding arc area.
It should be noted that: the first through hole 61 and the second through hole 62 on the rotary upper plate 6 have the same diameters as the first straight hole 81, the second straight hole 82, the first inclined hole 83 and the second inclined hole 84 on the fixed lower plate 8. In operation, as the upper plate rotates, the first through hole 61 and the second through hole 62 are respectively abutted with the first through hole 81, the second through hole 82, the first inclined hole 83 and the second inclined hole 84, and when no air injection is needed, the first through hole 61 and the second through hole 62 are abutted with the wall surface of the fixed lower plate so as to separate the connection between the air inlet passage and the combustion chamber.
As shown in fig. 9, the sliding arc cathode is provided with a first flow hole 41 and a second flow hole 42 inclined downward on both sides thereof, which communicate with a first inclined hole 83 and a second inclined hole 84 of the fixed lower disk 8, and the gas passing through this passage is finally sprayed toward the sliding arc portion. The lower part of the sliding arc cathode is provided with a spray hole 43, and the spray hole 43 is in butt joint with a first straight hole 81 and a second straight hole 82 of the fixed lower disc 8, so that the gas fuel passing through the channel is sprayed into the combustion chamber.
The working mode of the gas fuel igniter based on sliding arc discharge comprises the following steps:
S1: introducing gas fuel from the end cover, enabling the gas fuel to enter the rotary upper disc along the internal channel of the connecting mechanism, enabling the magnetic strips on the rotary upper disc to be at A, a at the moment, enabling the first through hole 61 and the second through hole 62 on the rotary upper disc 6 to be communicated with the first straight hole 81 and the second straight hole 82 of the fixed lower disc 8, and enabling the gas to be sprayed into the combustion chamber; as shown in fig. 10;
S2: energizing the coil B, b; the rotary upper plate 6 is rotated to B, b position by magnetic force, as shown in fig. 11, the first through hole 61 and the second through hole 62 of the rotary upper plate 6 are communicated with the first inclined hole 83 and the second inclined hole 84 of the fixed lower plate 8;
S3: a small amount of gas is injected again, and the gas is injected from the first flow hole 41 and the second flow hole 42 of the sliding arc cathode 4 after passing through the first inclined hole 83 and the second inclined hole 84, and generates rotational flow after touching the wall surface and enters the sliding arc area; as shown in fig. 12;
s4: the high voltage electrode is energized and the gas in the sliding arc region forms a plasma, as shown in fig. 13, igniting the combustion chamber mixture.
S5: after ignition, the coil C, c is energized, and the rotating upper disc 6 continues to rotate until the magnetic stripe on the rotating upper disc 6 is at C, c position, as shown in fig. 14; at this time, the first through hole 61 and the second through hole 62 of the rotary upper plate 6 do not overlap with the first straight hole 81, the second straight hole 82, the first inclined hole 83, and the second inclined hole 84 of the fixed lower plate 8. Preventing the gas pressure of the combustion chamber from being too high to cause backflow.
S6: the coil A, a is energized to align the first through hole 61 and the second through hole 62 on the rotary upper plate 6 with the first straight hole 81 and the second straight hole 82 of the fixed lower plate 8. Start the next cycle .
The invention adopts sliding arc plasma ignition, and can quickly and uniformly ignite the gas fuel in the engine by utilizing the high activity of the plasma. The method of adopting the inclined nozzle introduces the swirling flow of the gas fuel into the combustion chamber, accelerates the diffusion of the gas fuel in the combustion chamber, and can be better mixed with the air in the combustion chamber.
The above description is only of alternative embodiments of the present disclosure and is not intended to limit the disclosure, and various modifications and variations will be apparent to those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.
Although claims have been formulated in this application to particular combinations of features, it should be understood that the scope of the disclosure also includes any novel feature or any novel combination of features disclosed herein either explicitly or implicitly or any generalisation thereof, whether or not it relates to the same in any claim as presently claimed.
Claims (10)
1. The gas fuel igniter based on sliding arc discharge is characterized by comprising a connecting mechanism, an insulating ceramic sleeve, a sliding arc anode, a sliding arc cathode, a rotary upper disc, a power-on coil ring and a fixed lower disc, wherein the inner wall of the sliding arc anode is in fit connection with the insulating ceramic sleeve; an electrified coil ring is arranged in an annular cavity between the periphery of the sliding arc cathode and the insulating ceramic sleeve.
2. The gas fuel igniter based on sliding arc discharge according to claim 1, wherein the connecting mechanism comprises a platform section, a transition section and a cylindrical section which are sequentially connected, the platform section is lapped on the sliding arc anode, radial straight holes are formed in two sides of the bottom of the platform section, a limiting structure formed among the platform section, the transition section and the sliding arc anode is used for fixing an insulating ceramic sleeve, and an adapter ring is arranged on the periphery of the joint of the cylindrical section and the sliding arc cathode.
3. A gas fuel igniter based on sliding arc discharge according to claim 2 wherein the connecting mechanism is provided with an end cap, a portion of the connecting bolt extending through the end cap, the platform section into the sliding arc anode, and another portion of the connecting bolt extending through the end cap into the platform section.
4. The sliding arc discharge-based gas fuel igniter of claim 1 wherein the insulating ceramic sleeve is clamped in a limiting groove of the sliding arc anode, an inner wall of the insulating ceramic sleeve extending inwards is in contact with the sliding arc cathode, and the sliding arc cathode is arranged at a trapezoid nozzle of the sliding arc anode.
5. The gas fuel igniter based on sliding arc discharge of claim 1, wherein symmetrical through holes are axially formed in the rotary upper disc, and magnetic strips with opposite magnetism are embedded in the radial two sides of the rotary upper disc.
6. The gas fuel igniter based on sliding arc discharge of claim 5, wherein the fixed lower disc is axially provided with symmetrical straight holes, the straight holes penetrate through the upper top surface and the lower bottom surface of the fixed lower disc, and the hole diameters are gradually widened from top to bottom; the fixed lower disc is radially provided with symmetrical inclined holes, and the inclined holes penetrate through the upper top surface and the side wall of the fixed lower disc.
7. The gas fuel igniter of claim 6 wherein said sliding arc cathode has downwardly sloped first and second flow openings and vertically downward orifices, said orifices communicating with the straight bore of the fixed lower plate and said first and second flow openings communicating with the sloped bore of the fixed lower plate.
8. The sliding arc discharge-based gas fuel igniter of claim 6 wherein the coil ring is provided with three sets of coils, and when the first set of coils are energized, the through hole of the rotating upper plate is communicated with the straight hole of the fixed lower plate; when the second group of coils are electrified, the through holes in the rotary upper disc are communicated with the inclined holes of the fixed lower disc; when the third group of coils are electrified, the penetrating holes of the rotary upper disc are positioned on the upper wall surface of the fixed lower disc.
9. The sliding arc discharge based gaseous fuel igniter of claim 7 wherein gaseous fuel is injected into the combustion chamber from the nozzle orifice of the sliding arc cathode through the straight orifice of the fixed lower plate after being introduced; after the fuel and the air in the combustion chamber are mixed, the rotary upper disc rotates under the action of magnetic force, so that the through hole of the rotary upper disc is communicated with the inclined hole of the fixed lower disc; then injecting a small amount of gas again, injecting the gas from the first flow hole and the second flow hole of the sliding arc cathode after passing through the inclined hole of the fixed lower disc, contacting the wall surface and generating rotational flow, and finally entering the sliding arc area; then the high-voltage electrode is electrified to generate a sliding arc with the electrode gap of the high-voltage electrode, and the combustion chamber gas mixture is ignited.
10. The gas fuel igniter based on sliding arc discharge of claim 1, wherein after the ignition process is finished, the rotary upper disc rotates under the action of magnetic force, and the through hole turned to the rotary upper disc is not communicated with the straight hole and the inclined hole of the fixed lower disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410198087.1A CN118009351A (en) | 2024-02-22 | 2024-02-22 | Gas fuel igniter based on sliding arc discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410198087.1A CN118009351A (en) | 2024-02-22 | 2024-02-22 | Gas fuel igniter based on sliding arc discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118009351A true CN118009351A (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410198087.1A Pending CN118009351A (en) | 2024-02-22 | 2024-02-22 | Gas fuel igniter based on sliding arc discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118009351A (en) |
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2024
- 2024-02-22 CN CN202410198087.1A patent/CN118009351A/en active Pending
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