CN209053708U - A kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure - Google Patents
A kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure Download PDFInfo
- Publication number
- CN209053708U CN209053708U CN201821991281.1U CN201821991281U CN209053708U CN 209053708 U CN209053708 U CN 209053708U CN 201821991281 U CN201821991281 U CN 201821991281U CN 209053708 U CN209053708 U CN 209053708U
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- China
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- exhaust pipe
- gasket
- cylinder head
- seam allowance
- cover attaching
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Abstract
The utility model relates to a kind of exhaust pipe and cylinder cover attaching structure, specifically a kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure belong to technical field of automobile engine.It includes cylinder head and exhaust pipe, and exhaust pipe is equipped with exhaust pipe boss towards cylinder head one end, and cylinder head surface is equipped with cylinder head counterbore to exhaust pipe one end, and exhaust pipe boss passes through gasket centre bore and protrudes into cylinder head counterbore.High-temp waste gas and gasket are effectively isolated using seam allowance flange-type structure between the cylinder head and exhaust pipe of the utility model, avoid erosion and corrosion of the gasket by high-temp waste gas；Solve the problems, such as that gasket uneven heating generates thermal stress, this low overall work temperature of gasket of drop improves use environment, can effectively extend the service life of gasket；The positioning of exhaust pipe installation site may be implemented in seam allowance flange arrangement, keeps exhaust pipe installation more convenient.
Description
Technical field
The utility model relates to a kind of exhaust pipe and cylinder cover attaching structure, specifically a kind of seam allowance flange form exhaust
Pipe and cylinder cover attaching structure, belong to technical field of automobile engine.
Background technique
Currently, the connection of commercial vehicle engine exhaust pipe and cylinder head is all made of the structure type of face-flange shimming.
Be also easy to produce a degree of dilatation since exhaust pipe is heated, gasket can be squeezed lead to fail gas leakage and gasket exist by
The problem of direct erosion of high-temp waste gas is failed with corrosion.Therefore, each engine producer is sprayed by optimization using in gasket surface
Apply fire-resistant lubricants or solved using graphite Composition spacer or multilayer metal gasket exhaust pipe deformation to gasket extruding and
The problem of gasket is by high-temp waste gas erosion, to realize the connection and sealing between exhaust pipe and cylinder head.
By spraying fire-resistant lubricants in gasket surface or using graphite Composition spacer or multilayer metal gasket, certain journey
It is can solve on degree because exhaust pipe deformation causes gasket to be squeezed the problem of damaging, but the direct erosion of high-temp waste gas and corrosion is padded
Piece problem cannot solve very well.It would generally will receive directly with engine high-temperature exhaust gas contact mainly due to gasket inner edge
The directly etching of high-temp waste gas.Even because product design or assembly technology problem often lead to gasket inner hole and cylinder head exhaust duct
Hole is not perfectly aligned and occurs eccentrically mounted, will lead to direct erosion of the gasket bore section by high-temp waste gas, pads at this time
Piece other parts and cylinder head are in close contact, and due to usually there is cooling water channel at cylinder head, temperature is relatively low, will lead in gasket
Bore portion and other parts can have larger temperature gradient, and gasket itself can have bigger thermal stress.It is long-term in engine
After use, because the continuous erosion-corrosion of exhaust gas and the continuous action of thermal stress will cause gasket to occur in thermal stress larger part
Crackle or fracture and lead to gas leakage of failing, the exhaust gas of leakage can pollute atmospheric environment.
Summary of the invention
In place of the purpose of this utility model is to overcome above-mentioned deficiency, to provide a kind of seam allowance flange form exhaust pipe and gas
Cylinder cover connecting structure utilizes seam allowance using in such a way that exhaust pipe increases a boss and increases a counterbore in cylinder head
The connection structure effective protection exhaust pipe gasket inner hole of formula does not contact directly with high-temp waste gas, less will receive the straight of high-temp waste gas
Erosion and corrosion are connect, realizes that gasket overall structure is in almost the same operating temperature, thoroughly solves gasket by exhaust gas erosion
Or the problem that thermal stress is big, after engine long-time service, gasket will not be split because excessive by exhaust gas corrosion or thermal stress
Line or fracture can effectively extend the sealing performance and service life of gasket.
According to technical solution provided by the utility model, a kind of seam allowance flange form exhaust pipe includes with cylinder cover attaching structure
Cylinder head and exhaust pipe, it is characterized in that: cylinder head is equipped with cylinder head threaded hole, the row of being bolted on cylinder head threaded hole
Tracheae；Gasket is equipped between the exhaust pipe and cylinder head contact face, gasket center is equipped with gasket centre bore；The exhaust pipe
It is equipped with exhaust pipe boss towards cylinder head one end, cylinder head surface is equipped with cylinder head counterbore to exhaust pipe one end, and exhaust pipe boss is worn
Gasket centre bore is crossed to protrude into cylinder head counterbore.
It further, is clearance fit between exhaust pipe boss and cylinder head counterbore.
It further, is clearance fit between exhaust pipe boss and gasket centre bore.
Compared with the prior art the utility model has the advantage that
The utility model structure is simple, compact, reasonable, will be high using seam allowance flange-type structure between cylinder head and exhaust pipe
Warm exhaust gas and gasket are effectively isolated, and avoid erosion and corrosion of the gasket by high-temp waste gas；It solves gasket uneven heating and generates heat
The problem of stress, this low overall work temperature of gasket of drop improve use environment, and can effectively extend gasket uses the longevity
Life；The positioning of exhaust pipe installation site may be implemented in seam allowance flange arrangement, keeps exhaust pipe installation more convenient；Gasket overall work
Temperature reduces, and can be used that structure is simpler and the lower monolayer metal gasket of cost realizes sealing function.
Detailed description of the invention
Fig. 1 is the utility model main view.
Description of symbols: 1- cylinder head, 2- exhaust pipe, 3- gasket, 4- bolt, 5- exhaust pipe boss, 6- cylinder head spiral shell
Pit, 7- gasket centre bore, 8- cylinder head counterbore.
Specific embodiment
The utility model will be further described in conjunction with the embodiment in attached drawing below:
As shown in Figure 1, the utility model mainly includes cylinder head 1 and exhaust pipe 2, cylinder head 1 is equipped with cylinder head screw thread
Hole 6 connects exhaust pipe 2 by bolt 4 on cylinder head threaded hole 6.
Gasket 3 is equipped between 1 contact face of the exhaust pipe 2 and cylinder head, 3 center of gasket is equipped with gasket centre bore 7.
The exhaust pipe 2 is equipped with exhaust pipe boss 5 towards 1 one end of cylinder head, and cylinder head 1 is equipped with towards 2 one end of exhaust pipe
Cylinder head counterbore 8, exhaust pipe boss 5 pass through gasket centre bore 7 and protrude into cylinder head counterbore 8.
Be clearance fit between the exhaust pipe boss 5 and cylinder head counterbore 8, exhaust pipe boss 5 and gasket centre bore 7 it
Between be clearance fit.
It is using seam allowance flange-type structure that high-temp waste gas and gasket is effective between the cylinder head and exhaust pipe of the utility model
Isolation, avoids erosion and corrosion of the gasket by high-temp waste gas.Solve the problems, such as that gasket uneven heating generates thermal stress, drop is originally low
The overall work temperature of gasket, improves use environment, can effectively extend the service life of gasket.Seam allowance flange arrangement can be with
The positioning for realizing exhaust pipe installation site keeps exhaust pipe installation more convenient.Gasket overall work temperature reduces, and knot can be used
Structure is simpler and the lower monolayer metal gasket of cost realizes sealing function.
Claims (3)
1. a kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure, including cylinder head (1) and exhaust pipe (2), it is characterized in that:
Cylinder head (1) is equipped with cylinder head threaded hole (6), passes through bolt (4) connection exhaust pipe (2) on cylinder head threaded hole (6)；It is described
Gasket (3) are equipped between exhaust pipe (2) and cylinder head (1) contact face, gasket (3) center is equipped with gasket centre bore (7)；It is described
Exhaust pipe (2) is equipped with exhaust pipe boss (5) towards cylinder head (1) one end, and cylinder head (1) is equipped with gas towards exhaust pipe (2) one end
Cylinder cap counterbore (8), exhaust pipe boss (5) pass through gasket centre bore (7) and protrude into cylinder head counterbore (8).
2. a kind of seam allowance flange form exhaust pipe as described in claim 1 and cylinder cover attaching structure, it is characterized in that: the exhaust
It is clearance fit between pipe boss (5) and cylinder head counterbore (8).
3. a kind of seam allowance flange form exhaust pipe as described in claim 1 and cylinder cover attaching structure, it is characterized in that: the exhaust
It is clearance fit between pipe boss (5) and gasket centre bore (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821991281.1U CN209053708U (en) | 2018-11-29 | 2018-11-29 | A kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821991281.1U CN209053708U (en) | 2018-11-29 | 2018-11-29 | A kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209053708U true CN209053708U (en) | 2019-07-02 |
Family
ID=67054542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821991281.1U Active CN209053708U (en) | 2018-11-29 | 2018-11-29 | A kind of seam allowance flange form exhaust pipe and cylinder cover attaching structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209053708U (en) |
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2018
- 2018-11-29 CN CN201821991281.1U patent/CN209053708U/en active Active
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