CN209324476U - Sealing gasket and exhaust gas aftertreatment system - Google Patents
Sealing gasket and exhaust gas aftertreatment system Download PDFInfo
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- CN209324476U CN209324476U CN201820833662.0U CN201820833662U CN209324476U CN 209324476 U CN209324476 U CN 209324476U CN 201820833662 U CN201820833662 U CN 201820833662U CN 209324476 U CN209324476 U CN 209324476U
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- metal portion
- sealing gasket
- fibrous layer
- exhaust gas
- metal
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Abstract
The utility model provides a kind of sealing gasket comprising a metal portion and a fibrous layer, the metal portion are fixed on the one side of the fibrous layer.A kind of exhaust gas aftertreatment system using above-mentioned sealing gasket is also provided, a carrier is included at least, a metal shell and one are placed in the sealing gasket between the carrier and the metal shell.The sealing gasket is capable of the pulse shock of tail gas resistant to high temperatures, is reduced by deflation rate, and then improves the whole service life of sealing gasket and exhaust gas aftertreatment system.
Description
Technical field
The utility model relates to a kind of sealing gasket more particularly to a kind of sealing gasket for exhaust gas aftertreatment system with
And the exhaust gas aftertreatment system using the liner.
Background technique
In order to meet exhaust emission standard, existing internal combustion engine, including gasoline engine, diesel engine etc., it is largely equipped with tail
Gas after-treatment system.Exhaust gas aftertreatment system generally comprises the catalysis collectively constituted by ceramic monolith, sealing gasket, metal shell
Converting unit.Wherein, sealing gasket is generally made of refractory fibre and other functional stuffings, is to guarantee exhaust gas purification system in work
The key part operated normally under condition carries fixation, sealing, damping, noise reduction, heat-insulated effect.
Under actual operating mode, the high-temperature tail gas continuous pulse shock sealing gasket edge that engine generates, formation office
Bilge vortex, progressive failure gasket construction make refractory fibre and other functional stuffings gradually disengage and be taken away by tail gas, a side
Face leads to the fixed function degradation of sealing gasket, and the component being on the other hand detached from may block ceramic monolith duct, increase
Engine back pressure reduces tail gas catalyzed transformation efficiency, and the above process is referred to as " deflation " of sealing gasket.Sealing gasket deflation is
The important potential failure mode of exhaust gas purification system, seriously affects the exhaust gas purification system service life.
Therefore, it is necessary to design it is a kind of can tail gas resistant to high temperatures to the pulse shock at sealing gasket edge, reduce sealing lining
The sealing gasket of the deflation rate of pad and the exhaust gas purification system for using this kind of sealing gasket.
Summary of the invention
The utility model provides a kind of sealing gasket comprising a metal portion and a fibrous layer, the metal portion are fixed
On the one side of the fibrous layer.
Preferably, the first part of the metal portion is embedded in the first side of the fibrous layer.
Preferably, which includes the first metal portion and the second metal portion, and the first part of first metal portion is consolidated
It is scheduled on the first side of the fibrous layer, the second part of second metal portion is fixed on the second side of the fibrous layer.
Preferably, which is that a fiber wet embryo is made through drying, in the fiber wet embryo unseasoned period, the metal portion
It being placed in the first side of the fiber wet embryo, the first part of the metal portion is embedded into the first side of the fiber wet embryo,
The metal portion is obtained the sealing gasket together with the fiber wet embryo after drying.
Preferably, which further includes a fixed part.
Preferably, which includes a heat shrink films, which wraps up the metal portion and the fibrous layer, which receives
Contracting film is in heated after-contraction, to fasten the metal portion and the fibrous layer.
Preferably, which includes an adhesive tape, which wraps up the metal portion and the fibrous layer to fasten the metal
Portion and the fibrous layer.
Preferably, which includes adhesive, which is placed between the metal portion and the fibrous layer, with viscous
Close the metal portion and the fibrous layer.
Preferably, which includes wire, and the wire is corrugated.
The utility model also provides a kind of exhaust gas aftertreatment system comprising a carrier, a metal shell and a placement
A sealing gasket between the carrier and the metal shell, the sealing gasket include a metal portion and a fibrous layer, the gold
Category portion is fixed on the one side of the fibrous layer.
By the following detailed description, attached drawing and claim, other features and aspect can become apparent.
Detailed description of the invention
The exemplary embodiment of the utility model is described in conjunction with the accompanying drawings, may be better understood practical
It is novel, in the accompanying drawings:
Fig. 1 show a kind of schematic diagram of the section of the embodiment of exhaust gas aftertreatment system provided by the utility model；
Fig. 2 show a kind of structural schematic diagram of the embodiment of sealing gasket of the utility model；
Fig. 3 show a kind of structural schematic diagram of the embodiment of sealing gasket of the utility model；
Fig. 4 show the schematic diagram of the section A-A of the sealing gasket of embodiment illustrated in fig. 3；
Fig. 5 show a kind of structural schematic diagram of the embodiment of sealing gasket of the utility model；
Fig. 6 show the structural schematic diagram of the embodiment of another sealing gasket of the utility model；
Specific embodiment
Specific embodiment of the present utility model explained below, it should be pointed out that in the specific of these embodiments
During description, in order to carry out brief and concise description, this specification can not all features to actual embodiment it is equal
Make description in detail.It is to be understood that during the actual implementation of any one embodiment, as any one
During a engineering project or design object, in order to realize the objectives of developer, in order to meet system it is relevant or
The relevant limitation of person's business, can usually make various specific decisions, and this also can be from a kind of embodiment to another kind
It changes between embodiment.Moreover, it is to be understood that although effort made in this development process may be
It is complicated and interminable, however for those skilled in the art relevant to content disclosed by the utility model,
The some designs carried out on the basis of the technology contents that the disclosure discloses, the changes such as manufacture or production are conventional technique
It is insufficient to be not construed as content of this disclosure for means.
Unless otherwise defined, technical term or scientific term used in claims and specification should be this reality
The ordinary meaning understood with the personage in novel technical field with general technical ability.The utility model patent application explanation
" first ", " second " used in book and claims and similar word be not offered as any sequence, quantity or
Importance, and be used only to distinguish different component parts.The similar word such as "one" or " one " is not offered as quantity limitation,
But indicate that there are at least one.The similar word such as " comprising " or "comprising" means before appearing in " comprising " or "comprising"
The element or object in face cover the element for appearing in " comprising " or "comprising" presented hereinafter or object and its equivalent element,
Other elements or object is not precluded." connection " either the similar word such as " connected " be not limited to it is physics or mechanical
Connection, be also not necessarily limited to direct or indirect connection.In the description of the present invention, term " transverse direction ", " longitudinal direction ",
The orientation of the instructions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification is retouched
It states, is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
Fig. 1 show the diagrammatic cross-section of exhaust gas aftertreatment system 1 provided by the utility model, in the present embodiment, tail gas
After-treatment system 1 belongs to a part of automotive emission system, is located at the bottom of motor vehicle, and receives the hair of motor vehicle
The exhaust gas of motivation discharge, processing of the exhaust gas Jing Guo automotive emission system are emitted into atmosphere.The exhaust gas aftertreatment system
1 includes the carrier 3 of metal shell 4, catalyst.Carrier 3 is in cellular cylindrical body, using ceramic material, such design
High-temperature tail gas is facilitated to enter from ceramic monolith one end, after coming into full contact with, reacting coated in the catalyst on ceramic monolith surface
It is flowed out from the other end, the effective harmful components removed in tail gas realize the control of tail gas pollution.Metal shell 4 is covered on load
The outside of body 3 allows mode and tail gas piping connection that catalytic conversion unit is common by welding etc..In the periphery of carrier 3
Be wrapped in sealing gasket 2, sealing gasket 2 is placed in the position between 4 ceramic monolith 3 of metal shell, sealing gasket 2 with
The raising of working temperature start to expand, support force changes therewith, so as to make up between metal shell 4 and carrier 3
Widened gap, abundant immobilization carrier because of thermal expansion coefficient difference, while providing the function of heat-insulated, damping, sealing, guarantee
The service life of clarifier.As shown in Figure 1, the sealing gasket 2 includes fibrous layer 21 and metal portion 22, metal portion 22 is fixed
On the fibrous layer 21.In package carrier, can be packaged according to existing pressing type technique.In encapsulation beginning and end rank
In the press fitting stage of the i.e. corresponding metal portion of section, relatively low press fitting rate should be used.
Specifically, the figure illustrates a kind of structural representations of the embodiment of sealing gasket of the utility model referring to Fig. 2
Figure, sealing gasket 2 include metal portion and fibrous layer 21, and fibrous layer 21 is to guarantee that exhaust gas purification system operates normally under operating condition
Critical component, be generally made of refractory fibre and other fillers, conventional design be as shown in Fig. 2, include a protruding end and one
Matched female ends, in use, protruding end with recess section be connected to form hollow cylinder structure, with carrier and metal
Shell fitting.Metal portion can be using various refractory metals or alloy (heatproof is not less than 900 DEG C), preferably stainless steel.Gold
Category portion includes the first metal portion 221 and the second metal portion 222, and two metal portions are fixed on two sides of fibrous layer 21.This
The design of sample, while the effect for not influencing fibrous layer 21 immobilization carrier itself, metal portion can stop and weaken to come spontaneous
Pulse shock of the high-temperature tail gas of motivation to 21 edge of fibrous layer.
Further, in order to reduce cost, sealing gasket can use design as shown in Figure 3, the sealing gasket 2 into
Port side is provided with metal portion 22, and the first part of metal portion 22 is fixed in the first side on fibrous layer 21, such energy
It is enough that blocking is achieved the effect that with lower cost and weakens high-temperature tail gas impact.
In the present embodiment, for the fibrous layer 21 using made of wet processing, main component includes refractory fibre and expansion
Material can also not include expanding material, and above-mentioned material mixes after addition additive and water, and slurries are made, and slurries molding is done
At wet embryo, which is finally made fibrous layer through overmolding, drying and other steps, and fiber layer thickness is between 2-20mm.Metal portion
Between 2-10mm, specific value is determined 22 thickness by the gap between carrier and metal shell, and width is preferably 5-30mm
Between.Wet processing produce fibrous layer during, fiber slurry by injection mold to form, during molding, the metal
Portion 22 is placed in the first side of the fiber wet embryo, applies certain pressure to metal portion 22, so that the of metal portion 22
A part 201 is fully embedded the first side of the fiber wet embryo close to the part of fiber wet embryo that is, on width, gold
By after drying steps together with the fiber wet embryo, the first part 201 of metal portion 22 is just embedded in fibrous layer in category portion 22
21 first side.A-A sectional drawing as shown in Figure 4, first part 201 and the fibrous layer 21 of metal portion 22 be combined with each other, preferably
, metal portion 22 has cavernous structure, and the fiber of fibrous layer 21 gos deep into the cavernous structure of first part 201 of metal portion 22,
Play the purpose of fixed metal portion 22.From the angle of product, such production technology connects the combination of sealing gasket and metal portion
Continue smooth, even closer, the two is difficult to separate.From the angle of exhaust gas aftertreatment system catalyst unit encapsulation operation, can subtract
The step of few encapsulation process, allows to use relatively high press fitting speed in encapsulation process, improves the packaging efficiency of worker.
With continued reference to Fig. 2, in the embodiment shown in Figure 2, equally uses and put in above-mentioned fiber wet embryo forming process
The method for setting the first metal portion 221 and the second metal portion 222, so that the first part of first metal portion 221 is fully embedded
In the first side of the fibrous layer, the second part of second metal portion 222 is fully embedded the second of the fibrous layer
Side.
Fibrous layer in the solution of the sealing gasket of the offer of the utility model can be that wet processing is made can also
To be made of dry process, details are not described herein for specific dry method manufacturing process.Metal portion and the fixing means of fibrous layer 21 are
Multiplicity, with reference to fixed form shown in fig. 5, sealing gasket 2 further includes fixed part, and in the present embodiment, fixed part is using warm
Shrink film 231 first puts together metal portion 22 and fibrous layer 21, then with heat shrink films 231 wrap up metal portion 22 with
Fibrous layer 21, the heat shrink films 231 will generate inside active force in heated after-contraction, with fastening metal portion and fibrous layer,
Realize the integration of entire sealing gasket.Heat shrink films 231 include but is not limited to PE shrink film, POF shrink film, OPS shrink,
PET shrink film etc., film thickness are preferably between 0.015mm-0.35mm.Metal portion can be using unilateral design or using double
The design of side.
Similar, which can use adhesive tape, first put together metal portion 22 and fibrous layer 21, then sharp
It is wound up with adhesive tape, can produce inside active force in adhesive tape winding process, it is real with fastening metal portion and fibrous layer
The now integration of entire sealing gasket.The adhesive tape can use adhesive tape or opaque adhesive tape.
Further, in the embodiment shown in fig. 6, fixed part uses adhesive 232, and adhesive 232 is placed in gold
Between category portion 22 and fibrous layer 21, to fix metal portion 22 and fibrous layer 21.Adhesive includes organic bond and inorganic bond
Agent, organic bond include but is not limited to acrylic compounds, epoxy resin, silicone, polyethylene terephthalate etc.；Nothing
Machine adhesive includes but is not limited to Aluminum sol, silica solution, waterglass, sodium bentonite, clay etc..In process of production, work as fibre
It ties up after the completion of layer 21 manufactures, the coated with adhesive 232 in one or both sides, then places metal portion 22 in corresponding one or both sides,
Sealing gasket 2 can be obtained after compacting.In addition, fixed part can also use the combination of above-mentioned several embodiments, such as both exist
Increase adhesive between metal portion and fibrous layer, and wound using adhesive tape or wrapped up with heat shrink films, can further increase
Fixed intensity.
It is emphasized that metal portion 22 can use common metal plate in above-mentioned each embodiment, can also adopt
Use metal mesh.Preferably, metal portion 22 is formed by one or more metal wire knitted, which can be used various high temperature resistant gold
Category or alloy (heatproof is not less than 900 DEG C), wire is woven into undulatory net, can also weave in other rules or not advise
Then shape.Undulatory wire mesh has good elasticity, on the one hand has certain buffer function, on the other hand can hinder
High-temperature tail gas impact is kept off and weakens, such design can weaken high-temperature tail gas to the deflation at sealing gasket edge, improve
The reliability of sealing gasket finally extends the service life of entire exhaust gas aftertreatment system.
It should be noted last that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe is described in detail the utility model referring to preferred embodiment, those skilled in the art should understand that, it can be with
The technical solution of the present invention is modified or equivalently replaced, without departing from technical solutions of the utility model spirit and
Range.
Claims (9)
1. a kind of sealing gasket comprising a metal portion and a fibrous layer, the metal portion are fixed on the fibrous layer
On one side.
2. sealing gasket as described in claim 1, the first part of the metal portion is embedded in the first of the fibrous layer
Side.
3. sealing gasket as described in claim 1, the metal portion includes the first metal portion and the second metal portion, described first
The first part of metal portion is fixed on the first side of the fibrous layer, and the second part of second metal portion is fixed on
The second side of the fibrous layer.
4. sealing gasket as described in claim 1, the sealing gasket further includes a fixed part.
5. sealing gasket as claimed in claim 4, the fixed part includes a heat shrink films, described in the heat shrink films package
Metal portion and the fibrous layer, the heat shrink films are in heated after-contraction, to fasten the metal portion and the fibrous layer.
6. sealing gasket as claimed in claim 4, the fixed part includes an adhesive tape, the adhesive tape wrap up the metal portion with
The fibrous layer is to fasten the metal portion and the fibrous layer.
7. sealing gasket as claimed in claim 4, the fixed part includes adhesive, and described adhesive is placed in the gold
Between category portion and the fibrous layer, to bond the metal portion and the fibrous layer.
8. the sealing gasket as described in claim 1 to 7 any claim, the metal portion includes wire, the metal
Silk is corrugated.
9. a kind of exhaust gas aftertreatment system comprising a carrier and one is placed in the carrier and the gold at one metal shell
Belong to the sealing gasket between shell, the sealing gasket includes a metal portion and a fibrous layer, and the metal portion is fixed
On the one side of the fibrous layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820833662.0U CN209324476U (en) | 2018-05-31 | 2018-05-31 | Sealing gasket and exhaust gas aftertreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820833662.0U CN209324476U (en) | 2018-05-31 | 2018-05-31 | Sealing gasket and exhaust gas aftertreatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209324476U true CN209324476U (en) | 2019-08-30 |
Family
ID=67706048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820833662.0U Active CN209324476U (en) | 2018-05-31 | 2018-05-31 | Sealing gasket and exhaust gas aftertreatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209324476U (en) |
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2018
- 2018-05-31 CN CN201820833662.0U patent/CN209324476U/en active Active
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