CN111535914A - Novel engine exhaust pipe gasket - Google Patents
Novel engine exhaust pipe gasket Download PDFInfo
- Publication number
- CN111535914A CN111535914A CN202010290847.3A CN202010290847A CN111535914A CN 111535914 A CN111535914 A CN 111535914A CN 202010290847 A CN202010290847 A CN 202010290847A CN 111535914 A CN111535914 A CN 111535914A
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- China
- Prior art keywords
- gasket
- layer
- exhaust pipe
- arc
- convex rib
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- 238000007789 sealing Methods 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000011324 bead Substances 0.000 claims 4
- 238000002679 ablation Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 55
- 230000002238 attenuated effect Effects 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 206010049565 Muscle fatigue Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a novel engine exhaust pipe gasket, which relates to the technical field of internal combustion engines, wherein the exhaust pipe gasket is clamped between an exhaust pipe and a cylinder cover and is provided with an exhaust hole and a bolt mounting hole which are penetrated through up and down; the limiting layer gasket is arranged on the outer side of the arc-shaped convex rib; the bolt mounting hole is formed in the outer side of the arc-shaped convex rib; the first layer of gasket, the limiting layer of gasket and the second layer of gasket are all metal gaskets. The device provided by the invention not only solves the problem of air leakage caused by gasket ablation or gasket sealing rib fatigue failure caused by high temperature, but also can reduce the risk of air leakage caused by the fact that the sealing surface is dented due to overhigh surface pressure of the sealing rib.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a novel engine exhaust pipe gasket.
Background
The exhaust pipe is an important component of an engine exhaust system, and with the continuous upgrading of engine exhaust, when the engine works, the temperature of high-temperature exhaust gas exhausted from a combustion chamber is higher and higher, and high-temperature gas firstly enters the exhaust pipe through the cylinder cover exhaust passage, then enters the supercharger, finally passes through the supercharger vortex, then enters the exhaust pipeline and enters the atmosphere after being treated by the catalytic muffler. In order to ensure the normal work and safety of the engine and prevent the leaked high-temperature gas from damaging other parts of the engine and causing damage to human bodies due to high temperature, a sealing gasket with high temperature resistance and good reliability is required to be arranged at the connecting part of the exhaust pipe and the cylinder cover.
The sealing gasket structure of the current common exhaust system mainly comprises:
1. a single-layer metal gasket is adopted, and sealing ribs are arranged on the periphery of the exhaust port.
2. As shown in figure 4, four layers of metal gaskets which are welded in an overlapped mode are respectively provided with convex arc sealing ribs facing a sealing surface, the four layers of stainless steel gaskets with the same size structure are welded together, the scheme is high in cost, the requirement on the pretightening force of an exhaust system is high, the surface pressure of the sealing rib is high, and the risk that the sealing surface is dented to cause air leakage exists in the working process.
3. As shown in FIG. 5, two layers of metal gaskets adopting stitch welding are respectively provided with convex arc sealing ribs facing a sealing surface, and two gaskets with the same structure are welded together through uniform welding points.
At present, the following problem exists in current exhaust system seal gasket:
1. is easily ablated at high temperature, thereby causing fatigue failure.
2. The requirement on the pretightening force of an exhaust system is high, the surface pressure of the sealing rib part is too high, and the risk of air leakage caused by the fact that the sealing surface is dented exists in the work process.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel engine exhaust pipe gasket, which not only solves the problem of air leakage caused by gasket ablation or gasket sealing rib fatigue failure caused by high temperature, but also reduces the risk of air leakage caused by the fact that a sealing surface is dented due to overhigh surface pressure of a sealing rib part.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a novel engine exhaust pipe gasket is clamped between an exhaust pipe and a cylinder cover, an exhaust hole and a bolt mounting hole which penetrate through the exhaust pipe gasket from top to bottom are formed in the exhaust pipe gasket, the exhaust pipe gasket comprises a first layer of gasket, a limiting layer of gasket and a second layer of gasket which are overlapped from top to bottom, arc-shaped convex ribs protruding towards the sealing surface of the exhaust pipe and the cylinder cover are respectively arranged on the first layer of gasket and the second layer of gasket, and the arc-shaped convex ribs surround the exhaust hole;
the limiting layer gasket is arranged on the outer side of the arc-shaped convex rib;
the bolt mounting hole is formed in the outer side of the arc-shaped convex rib;
the first layer of gasket, the limiting layer of gasket and the second layer of gasket are all metal gaskets.
Furthermore, still encircle respectively on first layer gasket and the second floor gasket the arc protruding muscle sets up the protruding half protruding muscle towards the sealed face of blast pipe and cylinder head, half protruding muscle outside is protruding, inboard towards sealed face and the contact of spacing layer gasket.
Furthermore, the limiting layer gasket is respectively welded with the first layer gasket and the second layer gasket.
Compared with the prior art, the invention has the following beneficial effects:
1. the novel engine exhaust pipe gasket provided by the invention is provided with the limiting layer gasket, the bolt pressing force is mainly concentrated at the position of the limiting layer gasket, the arc-shaped convex rib is not completely flattened, the problem that the contact position surface of the arc-shaped convex rib and a sealing surface is too high in pressure can be avoided, the fatigue failure risk of the convex rib is reduced, the resilience performance of the gasket is effectively ensured, the problem of air leakage caused by fatigue failure of the sealing rib of the gasket is solved, and the risk of air leakage caused by indentation of the sealing surface due to too high surface pressure of the sealing rib position can be reduced;
2. under the high-temperature alternating working condition, if the bolt pressing force is attenuated, firstly, the pressing force of the gasket of the limiting layer is attenuated, and the pressure value of the arc-shaped convex rib is not attenuated basically, so that the leakage risk caused by the ablation of the gasket due to the leakage of high-temperature gas is prevented;
3. even if the arc-shaped convex ribs slightly leak, the semi-convex ribs of the first layer of gasket arranged above the limiting layer gasket and the semi-convex ribs of the second layer of gasket arranged below the limiting layer gasket can still prevent high-temperature gas from leaking, so that a plurality of sealing lines are formed, and the risk of gas leakage is effectively reduced;
4. spacing layer gasket and the welding of first layer gasket and second floor gasket have strengthened spacing layer gasket and first layer gasket and second floor gasket joint strength, reduce the gas leakage risk.
Drawings
FIG. 1 is a top view of an exhaust pipe gasket according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a partial cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;
FIG. 4 is a schematic structural diagram of a stitch-welded four-layer metal gasket in the prior art;
fig. 5 is a schematic structural diagram of a stitch-welded two-layer metal gasket in the background art.
In the figure, 1-a first layer of gasket, 2-a second layer of gasket, 3-a limiting layer of gasket, 4-an arc convex rib, 5-a half convex rib, 6-a bolt mounting hole and 7-an exhaust hole.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
As shown in fig. 1, a top view of a gasket of a novel exhaust pipe of an engine is provided, the gasket of the exhaust pipe is sandwiched between the exhaust pipe and a cylinder head, an exhaust hole 7 and a bolt mounting hole 6 are formed in the gasket of the exhaust pipe, the exhaust hole and the bolt mounting hole penetrate through the gasket of the exhaust pipe, and a mounting bolt penetrates through the bolt mounting hole 6 to connect the gasket of the exhaust pipe, the exhaust pipe and the cylinder head together.
As shown in fig. 2 and 3, the exhaust pipe gasket is formed by stacking a first gasket layer 1, a limiting gasket layer 3 and a second gasket layer 2 from top to bottom, wherein the first gasket layer 1, the limiting gasket layer 3 and the second gasket layer 2 are all metal gaskets. Wherein, first layer gasket 1 and second layer gasket 2 set up protruding convex rib 4 towards the sealed face of blast pipe and cylinder head around exhaust hole 7 respectively, convex rib 4 of arc respectively with the sealed face contact of blast pipe and engine cylinder head, prevent exhaust hole 7 gas leakage, spacing layer gasket 3 set up in the convex rib 4 outside of arc, bolt mounting hole 6 set up in the convex rib 4 outside of arc, the bolt packing force mainly concentrates on spacing layer gasket 3 position, and convex rib 4 of arc is not flattening completely, can avoid convex rib 4 of arc and sealed face contact position face to press too high problem, can reduce sealed rib position face and press the risk that the high sealed face is compressed concave and lead to gas leakage, reduce protruding muscle fatigue failure risk simultaneously, effectively guarantee the resilience performance of gasket, solve the problem that the sealed muscle fatigue failure of gasket leads to gas leakage. Under the high-temperature alternating working condition, if the bolt pressing force is attenuated, the pressing force of the position of the gasket 3 of the limiting layer is firstly attenuated, and the pressure value of the position of the arc-shaped convex rib 4 is basically not attenuated, so that the leakage risk caused by the ablation of the gasket due to the leakage of high-temperature gas is prevented.
Preferably, the first gasket layer 1 and the second gasket layer 2 are further provided with semi-convex ribs 5 protruding towards the sealing surface of the exhaust pipe and the cylinder head respectively around the arc-shaped convex ribs 4, the outer sides of the semi-convex ribs 5 protrude towards the sealing surface, are respectively contacted with the sealing surface of the exhaust pipe and the cylinder head of the engine, and the inner sides of the semi-convex ribs are contacted with the limiting layer gasket 3. Even the protruding muscle 4 of arc has slight seepage like this, sets up half protruding muscle 5 in first layer gasket 1 and the second floor gasket 2 of the upper and lower side of spacing layer gasket 3 still can prevent high-temperature gas leakage to form multichannel sealing line, effectively reduce the gas leakage risk.
As preferred scheme, spacing layer gasket 3 respectively with first layer gasket 1 and the welding of second layer gasket 2, strengthen spacing layer gasket 3 and first layer gasket 1 and the joint strength of second layer gasket 2, reduce the risk of leaking gas.
Although the invention has been described in detail above with reference to specific embodiments, it will be apparent to one skilled in the art that modifications or improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (3)
1. The utility model provides a novel engine exhaust pipe gasket, presss from both sides and arranges in between blast pipe and the cylinder head, in exhaust hole (7) and bolt mounting hole (6) that run through from top to bottom are provided with on the blast pipe gasket, the blast pipe gasket is including first layer gasket (1), spacing layer gasket (3) and second floor gasket (2) of from top to bottom superpose, its characterized in that:
the first layer of gasket (1) and the second layer of gasket (2) are respectively provided with an arc-shaped convex rib (4) protruding towards the sealing surface of the exhaust pipe and the cylinder cover, and the arc-shaped convex rib (4) surrounds the exhaust hole (7);
the limiting layer gasket (3) is arranged on the outer side of the arc-shaped convex rib (4);
the bolt mounting hole (6) is formed in the outer side of the arc-shaped convex rib (4);
the first layer of gasket (1), the limiting layer of gasket (3) and the second layer of gasket (2) are all metal gaskets.
2. The novel engine exhaust pipe gasket as recited in claim 1, characterized in that a semi-bead (5) protruding towards the sealing surface of the exhaust pipe and the cylinder head is further arranged on the first layer gasket (1) and the second layer gasket (2) around the arc-shaped bead (4), and the outer side of the semi-bead (5) protrudes towards the sealing surface, and the inner side of the semi-bead contacts with the limiting layer gasket (3).
3. The engine exhaust system sealing gasket according to claim 1 or 2, wherein the limiting layer gasket (3) is welded to the first layer gasket (1) and the second layer gasket (2), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010290847.3A CN111535914A (en) | 2020-04-14 | 2020-04-14 | Novel engine exhaust pipe gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010290847.3A CN111535914A (en) | 2020-04-14 | 2020-04-14 | Novel engine exhaust pipe gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111535914A true CN111535914A (en) | 2020-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010290847.3A Pending CN111535914A (en) | 2020-04-14 | 2020-04-14 | Novel engine exhaust pipe gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111535914A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010099A (en) * | 2005-07-04 | 2007-01-18 | Nichias Corp | Intake gasket |
| US20130320630A1 (en) * | 2012-06-01 | 2013-12-05 | Takashi Okano | Metal gasket |
| CN105156224A (en) * | 2015-10-30 | 2015-12-16 | 重庆长安汽车股份有限公司 | Exhaust manifold sealing gasket |
| CN208900235U (en) * | 2018-09-17 | 2019-05-24 | 潍柴动力股份有限公司 | A kind of exhaust pipe gasket |
| CN212337424U (en) * | 2020-04-14 | 2021-01-12 | 广西玉柴机器股份有限公司 | Novel engine exhaust pipe gasket |
-
2020
- 2020-04-14 CN CN202010290847.3A patent/CN111535914A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007010099A (en) * | 2005-07-04 | 2007-01-18 | Nichias Corp | Intake gasket |
| US20130320630A1 (en) * | 2012-06-01 | 2013-12-05 | Takashi Okano | Metal gasket |
| CN105156224A (en) * | 2015-10-30 | 2015-12-16 | 重庆长安汽车股份有限公司 | Exhaust manifold sealing gasket |
| CN208900235U (en) * | 2018-09-17 | 2019-05-24 | 潍柴动力股份有限公司 | A kind of exhaust pipe gasket |
| CN212337424U (en) * | 2020-04-14 | 2021-01-12 | 广西玉柴机器股份有限公司 | Novel engine exhaust pipe gasket |
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