CN111502812A - Sealing gasket for engine exhaust system - Google Patents
Sealing gasket for engine exhaust system Download PDFInfo
- Publication number
- CN111502812A CN111502812A CN202010291695.9A CN202010291695A CN111502812A CN 111502812 A CN111502812 A CN 111502812A CN 202010291695 A CN202010291695 A CN 202010291695A CN 111502812 A CN111502812 A CN 111502812A
- Authority
- CN
- China
- Prior art keywords
- gasket
- layer
- rib
- concave
- shaped sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 76
- 239000002184 metal Substances 0.000 claims description 8
- 238000002679 ablation Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 69
- 210000003205 muscle Anatomy 0.000 description 7
- 230000002238 attenuated effect Effects 0.000 description 6
- 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
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003584 silencer Effects 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
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1827—Sealings specially adapted for exhaust systems
-
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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 sealing gasket for an engine exhaust system, which relates to the technical field of internal combustion engines and comprises an exhaust hole and a bolt mounting hole in a penetrating manner, wherein the sealing gasket comprises a first layer of gasket, a limiting layer of gasket and a second layer of gasket which are superposed from top to bottom; the limiting layer gasket is arranged on the outer side of the concave arc-shaped sealing rib; the bolt mounting hole is formed in the contact area of the limiting layer gasket and the first layer gasket and the second layer gasket. 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 sealing gasket for an engine exhaust system.
Background
The exhaust system is an important component of the engine, and with the continuous upgrading of the engine emission, 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 an exhaust manifold through a cylinder cover exhaust passage, then enters a supercharger, finally passes through a supercharger vortex, then enters an exhaust pipeline, and enters the atmosphere after being treated by a catalytic silencer. 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, sealing gaskets with high temperature resistance and good reliability are required to be arranged at the connection parts of the exhaust system.
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 sealing gasket for an engine exhaust system, 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 sealing gasket for an engine exhaust system comprises a first layer gasket, a limiting layer gasket, a second layer gasket, an exhaust hole and a bolt mounting hole, wherein the first layer gasket, the limiting layer gasket and the second layer gasket are stacked from top to bottom, the exhaust hole and the bolt mounting hole penetrate through the sealing gasket,
the first layer of gasket and the second layer of gasket are respectively provided with an upper concave arc-shaped sealing rib and a lower concave arc-shaped sealing rib, and the concave bottom of the upper concave arc-shaped sealing rib is abutted against the concave bottom of the lower concave arc-shaped sealing rib and surrounds the exhaust hole;
the limiting layer gasket is arranged on the outer sides of the upper concave arc-shaped sealing rib and the lower concave arc-shaped sealing rib;
the bolt mounting hole is formed in the contact area of the limiting layer gasket and the first layer gasket and the second layer gasket;
the first layer of gasket, the limiting layer of gasket and the second layer of gasket are all metal gaskets.
Furthermore, the first layer of gasket and the second layer of gasket are respectively provided with an upper half concave rib and a lower half concave rib,
the upper semi-concave rib surrounds the upper concave arc-shaped sealing rib, and the outer side of the upper semi-concave rib is inwards concave and is in contact with the limiting layer gasket;
the lower semi-concave rib surrounds the lower concave arc-shaped sealing rib, and the outer side of the lower semi-concave rib is inwards concave and is in contact with the limiting 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 sealing gasket for the engine exhaust system is provided with a limiting layer gasket, the bolt pressing force is mainly concentrated at the limiting layer part, the upper concave arc-shaped sealing rib and the lower concave arc-shaped sealing rib are not completely flattened, two sealing lines can be formed at the contact part of the sealing surface, the pressing force can be kept unchanged, the fatigue failure risk of the sealing rib is reduced, the resilience performance of the gasket is ensured, the problem of air leakage caused by fatigue failure of the sealing rib of the gasket is solved, and meanwhile, the risk of air leakage caused by indentation of the sealing surface due to overhigh surface pressure at the sealing rib part can be reduced;
2. under the high-temperature alternating working condition, if the bolt pressing force is attenuated, the pressing force at the position of the limiting layer is firstly attenuated, and the pressure values at the upper concave arc-shaped sealing rib and the lower concave arc-shaped sealing rib are not basically attenuated, so that the leakage risk caused by the ablation of the gasket due to the leakage of high-temperature gas is prevented.
3. Even the sealed muscle of indent arc has slight seepage, the setting still can prevent high-temperature gas leakage at the first layer of muscle of spacing layer gasket top and the second layer of muscle of below second layer gasket, forms multichannel sealed line, effectively reduces the gas leakage risk.
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 exemplary gasket seal 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, 41-an upper concave arc-shaped sealing rib, 42-a lower concave arc-shaped sealing rib, 51-an upper half concave rib, 52-a lower half concave 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.
Fig. 1 is a top view of a sealing gasket of an engine exhaust system, wherein an exhaust hole 7 and a bolt mounting hole 6 are arranged on the sealing gasket in a penetrating way, and a mounting bolt penetrates through the bolt mounting hole 6 to connect the sealing gasket and a required sealing part together.
Referring to fig. 2 and fig. 3, the sealing gasket is formed by stacking three layers of gaskets, namely a first layer gasket 1, a limiting layer gasket 3 and a second layer gasket 2 from top to bottom, wherein the first layer gasket 1, the limiting layer gasket 3 and the second layer gasket 2 are all metal gaskets. Wherein, the first layer gasket 1 and the second layer gasket 2 are respectively provided with an upper concave arc-shaped sealing rib 41 and a lower concave arc-shaped sealing rib 42 around the exhaust hole 7, the concave bottom of the upper concave arc-shaped sealing rib 41 is vertically abutted with the bottom of the lower concave arc-shaped sealing rib 42 to prevent the exhaust hole 7 from air leakage, the spacing layer gasket 3 is arranged at the outer side of the upper concave arc-shaped sealing rib 41 and the lower concave arc-shaped sealing rib 42, the bolt mounting hole 6 is arranged at the contact area of the spacing layer gasket 3 and the first layer gasket 1 and the second layer gasket 2, the bolt pressing force is mainly concentrated at the position of the spacing layer gasket 3, the upper concave arc-shaped sealing rib 41 and the lower concave arc-shaped sealing rib 42 are not completely flattened, the risk that the sealing surface is dented to cause air leakage due to overhigh surface pressure at the sealing rib position can be reduced, and two, and can guarantee that the packing force keeps unchangeable and reduce sealed muscle fatigue failure risk, guarantee the resilience performance of gasket, solve the problem that the sealed muscle fatigue failure of gasket leads to leaking gas. Under the high-temperature alternating working condition, if the bolt pressing force is attenuated, the pressing force at the gasket position of the limiting layer is firstly attenuated, and the pressure values at the upper concave arc-shaped sealing rib 41 and the lower concave arc-shaped sealing rib 42 are 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, an upper half concave rib 51 and a lower half concave rib 52 are further arranged on the first-layer gasket 1 and the second-layer gasket 2, the upper half concave rib 51 surrounds the upper concave arc-shaped sealing rib 41, and the outer side of the upper half concave rib 51 is concave inwards and is in contact with the limiting-layer gasket 3; the lower half concave rib 52 surrounds the lower concave arc-shaped sealing rib 42, and the outer side of the lower half concave rib 52 is concave inwards and is in contact with the limiting layer gasket 3. Even if go up sealed muscle 41 of indent arc or the sealed muscle 42 of indent arc down and have slight seepage like this, the setting still can prevent high-temperature gas leakage at the first layer gasket 1's of spacing layer gasket 3 upper and lower half concave muscle 51 and the second layer gasket 2 in half concave muscle 52 down to form multichannel sealed 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 an engine exhaust system seal gasket, seal gasket is including first layer gasket (1), spacing layer gasket (3) and second layer gasket (2) from top to bottom superpose, still including running through seal gasket's exhaust hole (7) and bolt mounting hole (6), its characterized in that:
the first layer of gasket (1) and the second layer of gasket (2) are respectively provided with an upper concave arc-shaped sealing rib (41) and a lower concave arc-shaped sealing rib (42), and the concave bottom of the upper concave arc-shaped sealing rib (41) is abutted against the concave bottom of the lower concave arc-shaped sealing rib (42) and surrounds the exhaust hole (7);
the limiting layer gasket (3) is arranged on the outer sides of the upper concave arc-shaped sealing rib (41) and the lower concave arc-shaped sealing rib (42);
the bolt mounting hole (6) is formed in the contact area of the limiting layer gasket (3) and the first layer gasket (1) and the second layer gasket (2);
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 engine exhaust system sealing gasket according to claim 1, wherein the first layer gasket (1) and the second layer gasket (2) are further provided with an upper half concave rib (51) and a lower half concave rib (52), respectively,
the upper half concave rib (51) surrounds the upper concave arc-shaped sealing rib (41), and the outer side of the upper half concave rib (51) is concave inwards and is in contact with the limiting layer gasket (3);
the lower half concave rib (52) surrounds the lower concave arc-shaped sealing rib (42), and the outer side of the lower half concave rib (52) is concave inwards and is in contact 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 |
|---|---|---|---|
| CN202010291695.9A CN111502812A (en) | 2020-04-14 | 2020-04-14 | Sealing gasket for engine exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010291695.9A CN111502812A (en) | 2020-04-14 | 2020-04-14 | Sealing gasket for engine exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111502812A true CN111502812A (en) | 2020-08-07 |
Family
ID=71872717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010291695.9A Pending CN111502812A (en) | 2020-04-14 | 2020-04-14 | Sealing gasket for engine exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111502812A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232759A (en) * | 1995-02-22 | 1996-09-10 | Nippon Gasket Co Ltd | Metallic gasket for exhaust manifold |
| JP2002322945A (en) * | 2001-04-26 | 2002-11-08 | Taiho Kogyo Co Ltd | Cylinder head gasket |
| CN104395652A (en) * | 2012-06-01 | 2015-03-04 | 费德罗-莫格尔公司 | 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 |
| CN212337425U (en) * | 2020-04-14 | 2021-01-12 | 广西玉柴机器股份有限公司 | Sealing gasket for engine exhaust system |
-
2020
- 2020-04-14 CN CN202010291695.9A patent/CN111502812A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232759A (en) * | 1995-02-22 | 1996-09-10 | Nippon Gasket Co Ltd | Metallic gasket for exhaust manifold |
| JP2002322945A (en) * | 2001-04-26 | 2002-11-08 | Taiho Kogyo Co Ltd | Cylinder head gasket |
| CN104395652A (en) * | 2012-06-01 | 2015-03-04 | 费德罗-莫格尔公司 | 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 |
| CN212337425U (en) * | 2020-04-14 | 2021-01-12 | 广西玉柴机器股份有限公司 | Sealing gasket for engine exhaust system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS62116149U (en) | ||
| JP2521155Y2 (en) | Insulating metal laminated gasket | |
| JPH0536133Y2 (en) | ||
| CN212337425U (en) | Sealing gasket for engine exhaust system | |
| CN212337424U (en) | Novel engine exhaust pipe gasket | |
| CN111502812A (en) | Sealing gasket for engine exhaust system | |
| JPH04331875A (en) | Gasket laminated with steel | |
| JP2001173788A (en) | Metal gasket | |
| EP0430163A1 (en) | Steel laminate gasket with main and auxiliary sealing devices | |
| CN111535914A (en) | Novel engine exhaust pipe gasket | |
| JPS6346263B2 (en) | ||
| US20170107942A1 (en) | Cylinder head gasket | |
| CN212338156U (en) | Engine variable-rib high metal gasket | |
| CN219865213U (en) | Sealing gasket for engine exhaust system | |
| US5255927A (en) | Metal laminate type cylinder head gasket | |
| CN209469509U (en) | A kind of cylinder pad of automobile engine | |
| US5161498A (en) | Steel laminate type cylinder head gasket | |
| US5165372A (en) | Steel laminate type cylinder head gasket | |
| US20050093247A1 (en) | Cylinder head gasket | |
| CN214273820U (en) | Multi-combination gas sealing structure multilayer metal cylinder gasket | |
| CN205013232U (en) | Compressor cylinder head pad structure | |
| CN216950600U (en) | Cylinder gasket with dotted local support design | |
| CN205477969U (en) | Exhaust manifold seal gasket | |
| JPS6321706Y2 (en) | ||
| CN220622034U (en) | Multilayer engine cylinder gasket with warpage preventing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |