CN212810851U - Corona igniter protective sleeve and gas machine - Google Patents
Corona igniter protective sleeve and gas machine Download PDFInfo
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- CN212810851U CN212810851U CN202022003168.1U CN202022003168U CN212810851U CN 212810851 U CN212810851 U CN 212810851U CN 202022003168 U CN202022003168 U CN 202022003168U CN 212810851 U CN212810851 U CN 212810851U
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- sleeve
- corona igniter
- corona
- protective sheath
- protective
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Abstract
The utility model discloses a corona igniter protective sleeve and a gas machine, which belong to the field of natural gas engines, wherein the corona igniter protective sleeve is made of metal materials and comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve and the third sleeve are cylindrical, the first sleeve is arranged outside a coil of a corona igniter and has a preset gap with the coil, and the diameter of the third sleeve is smaller than that of the first sleeve; the second sleeve is in a cone cylinder shape, the small-diameter end of the second sleeve is connected with the third sleeve, and the large-diameter end of the second sleeve is connected with the first sleeve. The corona igniter protective sleeve can reduce electromagnetic interference generated on a corona igniter and improve ignition stability; the height of the corona igniter on the engine can be effectively reduced, so that the overall height of the engine is reduced, and the matching of the engine and a whole vehicle is facilitated; the corona igniter protective sleeve and the moving part in the housing are favorable for keeping reasonable gaps in the left-right direction and the height direction, and interference generated during mechanism movement is reduced.
Description
Technical Field
The utility model relates to a natural gas engine technical field especially relates to a corona igniter protective sheath and gas machine.
Background
Corona igniters cause ignition in the combustion chamber of an engine by corona discharge and are therefore an alternative to conventional spark plugs that cause ignition by arc discharge.
Corona igniter ignition control is more accurate than spark plugs and, due to the high ignition energy, penetration distance is multiplied over conventional spark plugs, which can significantly increase combustion speed, thereby reducing combustion consumption and emissions. However, the outline dimension of the corona igniter is much larger than that of the traditional spark plug, and the height of the engine is greatly increased by the structure of the traditional ignition coil protective sleeve, so that the corona igniter is not beneficial to matching with the whole vehicle. In order to reduce the height, the coil of the corona igniter needs to be partially sunk into the cylinder cover shell, and if the diameter of the sheath is simply increased, the coil of the corona igniter is easy to interfere with a moving part in the shell on one hand, and the coil of the corona igniter is easy to cause electromagnetic interference on the other hand, so that the ignition stability is influenced.
Therefore, a need exists for a corona igniter shield and a gas engine that solve the above problems.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a corona igniter protective sheath, this corona igniter protective sheath can reduce the height of corona igniter on the engine, reduces the electromagnetic interference that corona igniter protective sheath produced corona igniter, improves the ignition stability of corona igniter, can avoid producing with the interior motion piece of housing simultaneously and interfere.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model provides a corona igniter protective sheath, the cover is established in corona igniter periphery for the protection corona igniter, corona igniter protective sheath includes:
the first sleeve is cylindrical, is sleeved on the outer side of the coil of the corona igniter and hermetically penetrates through the cylinder cover housing, and a preset gap is formed between the inner wall of the first sleeve and the outer wall of the coil;
the third sleeve is cylindrical and is sleeved outside the central electrode of the corona igniter, the inner wall of the third sleeve is in clearance fit with the outer wall of the central electrode, and the diameter of the third sleeve is smaller than that of the first sleeve;
the second sleeve is in a conical cylinder shape, the small-diameter end of the second sleeve is connected with the third sleeve, and the large-diameter end of the second sleeve is connected with the first sleeve;
the corona igniter protective sleeve is made of a metal material.
As a preferred technical solution of the above corona igniter protective sleeve, the corona igniter protective sleeve further comprises:
the fourth sleeve is connected to one end, far away from the second sleeve, of the third sleeve, the fourth sleeve is in interference connection with the cylinder cover, and a first sealing structure is arranged between the fourth sleeve and the cylinder cover.
As an optimal technical scheme of the corona igniter protective sleeve, a protective sleeve mounting hole is formed in the cylinder cover, the fourth sleeve is in interference connection with the protective sleeve mounting hole, and the first sealing structure is arranged between the fourth sleeve and the protective sleeve mounting hole.
As the preferable technical scheme of the corona igniter protective sleeve, an accommodating through hole is formed in the cylinder cover housing, the first sleeve penetrates through the accommodating through hole and extends out of the cylinder cover, and a second sealing structure is arranged between the first sleeve and the accommodating through hole in a clearance fit mode.
As a preferable technical scheme of the corona igniter protective sleeve, the preset gap is not less than 10 mm.
As a preferred technical scheme of the corona igniter protective sleeve, the taper angle of the second sleeve ranges from 90 degrees to 140 degrees.
As a preferred embodiment of the corona igniter protective sleeve, a ratio of the diameter of the first sleeve to the diameter of the third sleeve is greater than or equal to 2.
As a preferred technical scheme of the corona igniter protective sleeve, the corona igniter protective sleeve is made of stainless steel.
A second object of the present invention is to provide a gas engine, which has a reduced overall height and improved reliability.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model provides a gas machine, includes corona igniter, cylinder head housing, cylinder head and as above arbitrary scheme corona igniter protective sheath, corona igniter passes the cylinder head housing is fixed in the cylinder head, corona igniter protective sheath is located outside the corona igniter.
As the preferable technical scheme of the gas engine, the cylinder cover is provided with an igniter mounting hole for fixing the corona igniter.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a corona igniter protective sheath and gas machine, corona igniter protective sheath are made by metal material, and have the preset clearance between the outer wall of the inner wall of first sleeve pipe and corona igniter coil, can reduce the electromagnetic interference that corona igniter protective sheath produced to the corona igniter, improve the ignition stability; the diameter of the third sleeve is smaller than that of the first sleeve, and the first sleeve and the third sleeve which are cylindrical are in transitional connection through the second sleeve which is in a cone cylinder shape, so that on one hand, the height of the corona igniter on the engine can be effectively reduced, the overall height of the engine is reduced, and the matching of the engine and a whole vehicle is facilitated; on the other hand, the corona igniter protective sleeve and the moving part in the housing are favorable for keeping reasonable gaps in the left-right direction and the height direction, and the interference generated when the mechanism moves is reduced; on the other hand, the length of the first sleeve matched with the cylinder head cover shell is reduced due to the two sleeves with different diameters, and the coaxiality is improved during machining, so that the sealing performance is improved.
Drawings
Fig. 1 is a schematic structural diagram of a partial structure of a gas engine according to an embodiment of the present invention.
In the figure:
1. a corona igniter protective sleeve; 11. a first sleeve; 12. a second sleeve; 13. a third sleeve; 14. a fourth sleeve;
2. a corona igniter; 21. a coil; 22. a center electrode;
3. a cylinder head cover; 31. an accommodating through hole;
4. a cylinder head; 41. a sheath mounting hole; 42. an igniter mounting hole;
5. a first seal structure; 6. a second seal structure; 7. a mover chamber.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment discloses a corona igniter protective sleeve 1, as shown in fig. 1, the corona igniter protective sleeve 1 is sleeved on the periphery of a corona igniter 2 and used for protecting the corona igniter 2. Corona igniter protective sheath 1 is made by metal material, and it mainly includes first sleeve 11, second sleeve 12 and the third sleeve 13 that connects gradually, and wherein, first sleeve 11 is the cylinder, and the outside of the coil 21 of corona igniter 2 is located to the cover and sealed the wearing to locate cylinder head housing 3, has the clearance of predetermineeing between the inner wall of first sleeve 11 and the outer wall of coil 21. The third sleeve 13 is cylindrical and is sleeved outside the central electrode 22 of the corona igniter 2, the inner wall of the third sleeve 13 is in clearance fit with the outer wall of the central electrode 22, and the diameter of the third sleeve 13 is smaller than that of the first sleeve 11. The second sleeve 12 is in a cone shape, the small-diameter end of the second sleeve 12 is connected with the third sleeve 13, and the large-diameter end of the second sleeve 12 is connected with the first sleeve 11.
The corona igniter protective sleeve 1 is made of metal materials, and a preset gap is formed between the inner wall of the first sleeve 11 and the outer wall of the coil 21 of the corona igniter 2, so that the electromagnetic interference of the corona igniter protective sleeve 1 on the corona igniter 2 can be reduced, and the ignition stability is improved; the diameter of the third sleeve 13 is smaller than that of the first sleeve 11, and the first sleeve 11 and the third sleeve 13 which are cylindrical are in transitional connection through the second sleeve 12 which is in a cone cylinder shape, so that on one hand, the height of the corona igniter 2 on the engine can be effectively reduced, the overall height of the engine is reduced, and the matching of the engine and the whole vehicle is facilitated; on the other hand, the corona igniter protective sleeve 1 and the moving part in the cylinder cover housing 3 are beneficial to keeping reasonable gaps in the left-right direction and the height direction, and interference generated when the mechanism moves is reduced; on the other hand, the length of the first sleeve 11 matched with the cylinder cover housing 3 is reduced by the two sleeves with different diameters, and the coaxiality is improved during machining, so that the sealing performance is improved.
Furthermore, an accommodating through hole 31 is formed in the cylinder cover housing 3, the first sleeve 11 penetrates through the accommodating through hole 31 and extends out of the cylinder cover 4, and a second sealing structure 6 is arranged between the first sleeve 11 and the accommodating through hole 31 in a clearance fit mode so as to prevent engine oil in the moving part cavity 7 inside the cylinder cover housing 3 from leaking outwards and prevent foreign matters outside the cylinder cover housing 3 from entering the moving part cavity 7 and affecting the performance and reliability of the engine. Alternatively, the second seal structure 6 may be an O-ring or lip seal.
The preset gap between the inner wall of the first sleeve 11 and the outer wall of the coil 21 is not less than 10mm to ensure that the attenuation of the ignition energy caused by the electromagnetic interference generated by the first sleeve 11 on the coil 21 is reduced to an acceptable level, thereby ensuring the stability of corona ignition.
Further, the minimum clearance allowed by the assembly between the center electrode 22 and the third sleeve 13 ensures that the third sleeve 13 has a smaller outer diameter to avoid interference between the third sleeve 13 and the valve train in the movable member chamber 7.
In this embodiment, the taper angle of the second sleeve 12 preferably ranges from 90 ° to 140 °. The first sleeve 11 and the third sleeve 13 are transited by adopting a second sleeve 12 in a cone cylinder shape, so that reasonable gaps are kept between the corona igniter protective sleeve 1 and a valve actuating mechanism in the moving part cavity 7 in the left-right direction and the height direction on one hand, and interference generated during mechanism movement is eliminated; on the other hand, the strength between the first sleeve 11 and the third sleeve 13 is improved, and cracking in the assembling process is avoided. Further preferably, the diameter of the first sleeve 11 is more than 2 times the diameter of the third sleeve 13.
The corona igniter protective sleeve 1 in the embodiment further comprises a fourth sleeve 14, the fourth sleeve 14 is connected to one end, away from the second sleeve 12, of the third sleeve 13, the fourth sleeve 14 is in interference connection with the cylinder head 4, and a first sealing structure 5 is arranged between the fourth sleeve 14 and the cylinder head 4. Specifically, a sheath mounting hole 41 and an igniter mounting hole 42 are formed in the cylinder head 4, the fourth sleeve 14 is connected to the sheath mounting hole 41 in an interference manner, the first sealing structure 5 is arranged between the fourth sleeve 14 and the sheath mounting hole 41, and the tail end of the corona igniter 2 extends into the igniter mounting hole 42 and is fixed. Optionally, the first sealing structure 5 is an O-ring rubber seal, and the first sealing structure 5 is arranged to prevent the oil in the mover chamber 7 from entering the igniter mounting hole 42, thereby preventing the corona igniter 2 from being corroded by the oil and failing.
The diameters of the first sleeve 11 and the third sleeve 13 are different, so that the length of the first sleeve 11 matched with the cylinder cover housing 3 is reduced, the coaxiality between the first sleeve 11 and the fourth sleeve 14 is improved during machining, the fit clearance between the first sleeve 11 and the accommodating through hole 31 can be reduced, and the sealing performance is improved.
Optionally, an annular positioning portion is disposed between the third sleeve 13 and the fourth sleeve 14, and a positioning boss is correspondingly disposed on the cylinder head 4, and when the lower end face of the positioning portion abuts against the upper end face of the positioning boss, the corona igniter protective sleeve 1 is assembled in place. It is understood that the positioning portion may be a part of the structure of the third sleeve 13 or may be a separate structure.
In this embodiment, the corona igniter protective sleeve 1 is preferably made of stainless steel, although other metallic materials may be used in other embodiments. The first sleeve 11, the second sleeve 12, the third sleeve 13, the positioning portion and the fourth sleeve 14 are integrally formed metal pieces, and machining and forming are facilitated.
The embodiment also provides a gas machine, which comprises a corona igniter 2, a cylinder cover housing 3, a cylinder cover 4 and the corona igniter protective sleeve 1, wherein the corona igniter 2 penetrates through the cylinder cover housing 3 to be fixed on the cylinder cover 4, and the corona igniter protective sleeve 1 is sleeved outside the corona igniter 2. The gas engine adopts the corona igniter protective sleeve 1, so the whole height is reduced, and the use reliability is improved.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a corona igniter protective sheath, the cover is established in corona igniter periphery for the protection corona igniter, its characterized in that, corona igniter protective sheath includes:
the first sleeve (11) is cylindrical, is sleeved on the outer side of the coil (21) of the corona igniter and hermetically penetrates through the cylinder cover housing (3), and a preset gap is formed between the inner wall of the first sleeve (11) and the outer wall of the coil (21);
the third sleeve (13) is cylindrical and is sleeved outside the central electrode (22) of the corona igniter, the inner wall of the third sleeve (13) is in clearance fit with the outer wall of the central electrode (22), and the diameter of the third sleeve (13) is smaller than that of the first sleeve (11);
the second sleeve (12) is in a conical cylinder shape, the small-diameter end of the second sleeve (12) is connected with the third sleeve (13), and the large-diameter end of the second sleeve (12) is connected with the first sleeve (11);
the corona igniter protective sleeve is made of a metal material.
2. The corona igniter protective sheath of claim 1 further comprising:
the fourth sleeve (14) is connected to one end, far away from the second sleeve (12), of the third sleeve (13), the fourth sleeve (14) is in interference connection with the cylinder cover (4), and a first sealing structure (5) is arranged between the fourth sleeve (14) and the cylinder cover (4).
3. The corona igniter protective sheath of claim 2,
a jacket mounting hole (41) is formed in the cylinder cover (4), the fourth sleeve (14) is connected to the jacket mounting hole (41) in an interference mode, and the first sealing structure (5) is arranged between the fourth sleeve (14) and the jacket mounting hole (41).
4. The corona igniter protective sheath of claim 2,
the cylinder cover housing (3) is provided with an accommodating through hole (31), the first sleeve (11) penetrates through the accommodating through hole (31) and extends out of the cylinder cover (4), and a second sealing structure (6) is arranged between the first sleeve (11) and the accommodating through hole (31) in clearance fit.
5. The corona igniter protective sheath of claim 1,
the preset gap is not less than 10 mm.
6. The corona igniter protective sheath of claim 1,
the taper angle of the second sleeve (12) ranges from 90 degrees to 140 degrees.
7. The corona igniter protective sheath of claim 1,
the ratio of the diameter of the first sleeve (11) to the diameter of the third sleeve (13) is greater than or equal to 2.
8. The corona igniter protective sheath of claim 1,
the corona igniter protective sleeve is made of stainless steel.
9. Gas engine, characterized in that it comprises a corona igniter, a cylinder head cover (3), a cylinder head (4) and a corona igniter protective sleeve according to any of claims 1 to 8, said corona igniter passing through said cylinder head cover (3) and being fixed to said cylinder head (4), said corona igniter protective sleeve being located outside said corona igniter.
10. The gas engine of claim 9, wherein said cylinder head (4) defines an igniter mounting hole (42) for securing said corona igniter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022003168.1U CN212810851U (en) | 2020-09-14 | 2020-09-14 | Corona igniter protective sleeve and gas machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022003168.1U CN212810851U (en) | 2020-09-14 | 2020-09-14 | Corona igniter protective sleeve and gas machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212810851U true CN212810851U (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022003168.1U Active CN212810851U (en) | 2020-09-14 | 2020-09-14 | Corona igniter protective sleeve and gas machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212810851U (en) |
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2020
- 2020-09-14 CN CN202022003168.1U patent/CN212810851U/en active Active
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