CN107237676A - The casting method of the exhaust pipe of engine, engine and the exhaust pipe of engine - Google Patents
The casting method of the exhaust pipe of engine, engine and the exhaust pipe of engine Download PDFInfo
- Publication number
- CN107237676A CN107237676A CN201710519014.8A CN201710519014A CN107237676A CN 107237676 A CN107237676 A CN 107237676A CN 201710519014 A CN201710519014 A CN 201710519014A CN 107237676 A CN107237676 A CN 107237676A
- Authority
- CN
- China
- Prior art keywords
- engine
- exhaust pipe
- exhaust
- earthenware
- casting
- 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
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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- 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
- F01N13/14—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 having thermal insulation
-
- 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
- F01N13/16—Selection of particular materials
Abstract
Technical field is made the invention belongs to exhaust pipe of engine, and in particular to the casting method of a kind of exhaust pipe of engine, engine and the exhaust pipe of engine.The exhaust pipe of engine of the present invention, including exhaust pipe and earthenware, the earthenware is located at the inside of the exhaust pipe, and the earthenware is internally formed exhaust passage, and the waste gas discharged from engine can be emitted into after-treatment device by the internal exhaust passages of the earthenware.By using the casting method of the exhaust pipe of engine of the present invention, engine and the exhaust pipe of engine, the surface quality of exhaust pipe internal surface can be improved, reduce the exhaust resistance of engine, improve the exhaust performance of engine, the heat conductivity of the exhaust pipe of engine is reduced simultaneously, prevent temperature from spreading, so that temperature loss when reducing engine exhaust, promotes the efficient operation of after-treatment device.
Description
Technical field
Technical field is made the invention belongs to exhaust pipe of engine, and in particular to the exhaust pipe of engine, engine and started
The casting method of machine blast pipe.
Background technology
At present, the problem of inside roughness in order to solve the exhaust pipe of engine, in the manufacturing process of the exhaust pipe of engine
In generally cast using gray cast iron, spheroidal graphite cast-iron and the homogenous material such as other, the rough surface of blast pipe internal passage
Degree depends on the granular size of used core sand during manufacture blast pipe.Due to high temperature liquid iron during cast and flowing gesture
There must be certain impact failure to core sand, therefore the blast pipe internal passage surface actually manufactured is typically relatively rough.
Therefore after the completion of casting, sand removal and surface treatment can be also carried out inside general blast pipe by way of bead.Even if this
Sample, still really can not effectively improve the smoothness of exhaust inside pipe wall.And it is vented that tube cavity road is more coarse, exhaust resistance is got over
Greatly, more it is unfavorable for engine exhaust, so as to influence performance and the oil consumption of engine.
Due to the continuous upgrading of draining technology, major engine works commercial cities are in constantly upgrading exhaust aftertreatment devices.By
There is the characteristics of thermal conductivity is good in itself in metal blast pipe, in use, exhaust is warm for the blast pipe of homogenous material casting
Degree is with from head exhaust door to the loss of a little of the after-treatment device of last vehicle.And locate after increasingly advanced discharge
Reason device wants more and more higher for the requirement of row's temperature, therefore existing blast pipe manufacture can not increasingly meet exhaust temperature
Requirement, or even some producers post processing when delivery temperature is heated again.It is existing for the insulation of blast pipe
Blast pipe manufacturer is mainly thermally shielded from outside, such as outside bag mud, parcel thermal insulation layer and in exhaust outer tube layer coating
The heat-barrier material of other base materials.The mode of bag mud is more traditional, but unsightly, is eliminated gradually, parcel thermal insulation layer and coating
Other base materials can also influence outward appearance, and cost increase is a lot, and most importantly internal passage does not have therefore improved, for
Lifting without essence in terms of engine performance.
In summary, the existing exhaust pipe of engine has the deficiency of the following aspects：
1st, the engine exhaust pipe internal surface manufactured by traditional handicraft is relatively rough, and resistance is larger, influences legal and exhaust
Performance and oil consumption.
2nd, the blast pipe of simple metal casting, possesses the characteristics of metal heat-conducting is fast, therefore, exists necessarily in terms of insulation
Defect.
The content of the invention
To solve at least one problem in above-mentioned prior art problem, the present invention propose a kind of exhaust pipe of engine,
The casting method of engine and the exhaust pipe of engine, by using the exhaust pipe of engine of the present invention, engine and starts
The casting method of machine blast pipe, it is possible to increase the surface quality of engine exhaust pipe internal surface, reduces the exhaust resistance of engine,
So as to reduce temperature loss during engine exhaust, the exhaust performance of engine is improved, while reducing the exhaust pipe of engine
Heat conductivity, prevents temperature from spreading.
The exhaust pipe of engine of the present invention, including exhaust pipe and earthenware, the earthenware is located at described
The inside of exhaust pipe, the earthenware is internally formed exhaust passage, and the waste gas discharged from engine can pass through the pottery
The internal exhaust passages of porcelain tube are emitted into after-treatment device.
Further, the outer surface of the earthenware and the inner surface of the exhaust pipe fit.
Further, the wall thickness of the earthenware is 3~5mm.
Further, the material of the earthenware is carborundum.
Further, the thickness that the earthenware is penetrated into the exhaust pipe is 0.2~0.5mm.
Engine of the present invention, including the exhaust pipe of engine described in any of the above-described.
Casting method of the present invention, including following steps：
Castable ceramic core：The powder body material of ceramic core is mixed, and adds Ludox, agitated rear acquisition institute
The slurry of ceramic core moulding by casting is stated, by the slurry cast obtained to the die cavity for carrying out the ceramic core solidification
It is interior, cured rear acquisition solid ceramic core；
Pour into a mould exhaust pipe：Using the solid ceramic core as exhaust pipe casting mold core, to the exhaust
Pouring molten iron in body casting mold, the temperature of the molten iron of cast is 1350 DEG C~1450 DEG C；
It is molded the exhaust pipe of engine：After the completion of molten iron casting, to carrying out the exhaust pipe casting moulds after molten iron casting
Tool carries out natural cooling, after after the molten iron in mould completely cooling, opens mould, the exhaust pipe of engine after being molded.
Further, the time that the exhaust pipe casting mold carries out natural cooling is more than one hour.
Further, the wall thickness of the solid ceramic core after solidification is 3~5mm.
Further, in the Ludox silica content >=28wt.%.
By using the exhaust pipe of engine of the present invention and casting method, corresponding ceramics are set in exhaust pipe
Pipe, it is possible to increase the surface quality of engine exhaust pipe internal surface, reduces the exhaust resistance of engine, improves the exhaust of engine
Performance, while reducing the heat conductivity of the exhaust pipe of engine, prevents temperature from spreading, so that temperature when reducing engine exhaust
Loss, promotes the efficient operation of after-treatment device.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is the cross-sectional view intercepted along line A-A of the exhaust pipe of engine of embodiment in Fig. 1；
Fig. 3 is the casting flow chart of the exhaust pipe of engine of embodiment for the present invention.
Each mark is expressed as follows in accompanying drawing：
10：Exhaust pipe, 20：Earthenware.
Embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in accompanying drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.Conversely it is able to be best understood from the disclosure there is provided these embodiments, and can be by this public affairs
The scope opened completely convey to those skilled in the art.
Fig. 1 is the structural representation of the embodiment of the present invention.Fig. 2 is the section knot of the exhaust pipe of engine of embodiment in Fig. 1
Structure schematic diagram.As illustrated, the exhaust pipe of engine in the present embodiment includes exhaust pipe 10 and earthenware 20, earthenware 20 is set
In the inside of exhaust pipe 10, earthenware 20 is internally formed exhaust passage, and the waste gas discharged from engine can pass through ceramics
The internal exhaust passages of pipe 20 are emitted into after-treatment device.
Corresponding earthenware 20 is set in exhaust pipe 10, it is possible to increase the surface quality of exhaust pipe internal surface, reduced
The exhaust resistance of engine, so that temperature loss when reducing engine exhaust, improves the exhaust performance of engine, is reduced simultaneously
The heat conductivity of the exhaust pipe of engine, prevents temperature from spreading.
Further, in order to preferably carry out the exhaust of engine, rationally using the inner space of the exhaust pipe of engine, subtract
Few heat loss, the outer surface of earthenware 20 and the inner surface of exhaust pipe 10 fit.
The profile of earthenware 20 and the inner wall shape of exhaust pipe 10 are just the same.The exhaust pipe of engine can use to make pottery
Earthenware 20 and exhaust pipe 10 are carried out integrally casting by porcelain tube 20 for the mode of core pouring molten iron, while can also use
Ceramic percolation is carried out on the inwall of the exhaust pipe 10 processed, by a part of ceramic percolation to the inside of exhaust pipe 10, together
When exhaust pipe 10 inwall on also be provided with certain thickness ceramic material.
In the present embodiment, use and enter earthenware 20 and exhaust pipe 10 in the way of earthenware 20 is core pouring molten iron
Row integrally casting, wherein, it is 3~5mm as the wall thickness of the earthenware 20 of core, the material of earthenware 20 is carborundum.
According to the mode of the osmotic ceramic on the inwall of exhaust pipe 10, wherein earthenware 20 is penetrated into exhaust pipe 10
Thickness be 0.2~0.5mm.
The invention also provides a kind of engine, including the exhaust pipe of engine described in any of the above-described.
Fig. 3 is the casting flow chart of the exhaust pipe of engine of embodiment for the present invention.Engine exhaust in the present embodiment
The casting process of pipe comprises the following steps：
Castable ceramic core：The powder body material of ceramic core is mixed, and adds Ludox, it is agitated to be made pottery afterwards
The slurry of porcelain core moulding by casting, by the slurry cast obtained to the die cavity for carrying out ceramic core solidification in, through solid
Solid ceramic core is obtained after change.
Pour into a mould exhaust pipe：Using the solid ceramic core as exhaust pipe casting mold core, to exhaust pipe
Pouring molten iron in casting mold, the temperature of the molten iron of cast is 1350 DEG C~1450 DEG C.
It is molded the exhaust pipe of engine：After the completion of molten iron casting, enter to carrying out the exhaust pipe casting mold after molten iron casting
Row natural cooling, after after the molten iron in mould completely cooling, opens mould, the exhaust pipe of engine after being molded.
Wherein, the time that exhaust pipe casting mold carries out natural cooling is more than one hour.
After mould is cooled down, the molten iron in mould, mould is opened by being cooled into exhaust pipe 10, while being used as core
Earthenware 20 inside is coated on by exhaust pipe 10, the two is bonded to each other, be integrally formed the exhaust pipe of engine.
Wherein, for silica in the Ludox that is mixed the powder body material of ceramic core content >=
28wt.%.
Further, in order to improve heat insulation effect and casting reliability, wherein the wall thickness of solid ceramic core be 3~
5mm。
By using the casting method of the exhaust pipe of engine in the present invention, corresponding ceramics are set in exhaust pipe 10
Pipe 20, it is possible to increase the surface quality of engine exhaust pipe internal surface, reduces the exhaust resistance of engine, so as to reduce engine
Temperature loss during exhaust, improves the exhaust performance of engine, while reducing the heat conductivity of the exhaust pipe of engine, prevents temperature
Degree diffusion, promotes the height of after-treatment device (for example, SCR device, EGR device, DOC device or PDF devices or its combination etc.)
Imitate work.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Enclose and be defined.
Claims (10)
1. a kind of exhaust pipe of engine, it is characterised in that including exhaust pipe and earthenware, the earthenware is located at the exhaust
The inside of body, the earthenware is internally formed exhaust passage, and the waste gas discharged from engine can pass through the earthenware
Internal exhaust passages be emitted into after-treatment device.
2. the exhaust pipe of engine according to claim 1, it is characterised in that the outer surface of the earthenware and the exhaust
The inner surface of body fits.
3. the exhaust pipe of engine according to claim 2, it is characterised in that the wall thickness of the earthenware is 3~5mm.
4. the exhaust pipe of engine according to claim 3, it is characterised in that the material of the earthenware is carborundum.
5. the exhaust pipe of engine according to claim 1, it is characterised in that the earthenware penetrates into the exhaust pipe
Interior thickness is 0.2~0.5mm.
6. a kind of engine, it is characterised in that the engine includes according to any one of claim 1 to 5 start
Machine blast pipe.
7. a kind of casting method for being used to carry out the exhaust pipe of engine any one of casting claim 1-4, its feature
It is, comprises the following steps：
Castable ceramic core：The powder body material of ceramic core is mixed, and adds Ludox, the agitated rear acquisition pottery
The slurry of porcelain core moulding by casting, by the slurry cast obtained to for carry out the ceramic core solidification die cavity in,
Solid ceramic core is obtained after cured；
Pour into a mould exhaust pipe：Using the solid ceramic core as exhaust pipe casting mold core, to the exhaust pipe
Pouring molten iron in casting mold, the temperature of the molten iron of cast is 1350 DEG C~1450 DEG C；
It is molded the exhaust pipe of engine：After the completion of molten iron casting, enter to carrying out the exhaust pipe casting mold after molten iron casting
Row natural cooling, after after the molten iron in mould completely cooling, opens mould, the exhaust pipe of engine after being molded.
8. casting method according to claim 7, it is characterised in that the exhaust pipe casting mold carries out natural cooling
Time be more than one hour.
9. casting method according to claim 7, it is characterised in that the wall thickness of the solid ceramic core after solidification is
3~5mm.
10. casting method according to claim 7, it is characterised in that the content of silica in the Ludox >=
28wt.%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519014.8A CN107237676A (en) | 2017-06-30 | 2017-06-30 | The casting method of the exhaust pipe of engine, engine and the exhaust pipe of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519014.8A CN107237676A (en) | 2017-06-30 | 2017-06-30 | The casting method of the exhaust pipe of engine, engine and the exhaust pipe of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107237676A true CN107237676A (en) | 2017-10-10 |
Family
ID=59990742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710519014.8A Pending CN107237676A (en) | 2017-06-30 | 2017-06-30 | The casting method of the exhaust pipe of engine, engine and the exhaust pipe of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107237676A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55165270A (en) * | 1979-06-09 | 1980-12-23 | Mitsubishi Heavy Ind Ltd | Heat-insulating structure casting |
| CN1380489A (en) * | 2002-05-30 | 2002-11-20 | 山东大学 | Exhaust tube of engine and its integral preparation process |
| US20030106311A1 (en) * | 2001-12-07 | 2003-06-12 | Moore Dan T. | Insulated exhaust manifold |
| CN1745938A (en) * | 2004-09-09 | 2006-03-15 | 联合工艺公司 | Composite core for use in precision investment casting |
| CN101189416A (en) * | 2005-05-04 | 2008-05-28 | 富尔西亚排气系统公司 | Double-shell manifold |
| CN201507341U (en) * | 2009-09-22 | 2010-06-16 | 武汉市澳特玛汽车配件有限责任公司 | Exhaust pipe assembly |
| CN201650413U (en) * | 2010-03-16 | 2010-11-24 | 董海臣 | Muffler for exhaust pipe of ceramic-core engine |
| CN106890927A (en) * | 2015-12-18 | 2017-06-27 | 辽宁法库陶瓷工程技术研究中心 | One kind casting ceramic air set core powder and preparation method |
-
2017
- 2017-06-30 CN CN201710519014.8A patent/CN107237676A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55165270A (en) * | 1979-06-09 | 1980-12-23 | Mitsubishi Heavy Ind Ltd | Heat-insulating structure casting |
| US20030106311A1 (en) * | 2001-12-07 | 2003-06-12 | Moore Dan T. | Insulated exhaust manifold |
| CN1380489A (en) * | 2002-05-30 | 2002-11-20 | 山东大学 | Exhaust tube of engine and its integral preparation process |
| CN1745938A (en) * | 2004-09-09 | 2006-03-15 | 联合工艺公司 | Composite core for use in precision investment casting |
| CN101189416A (en) * | 2005-05-04 | 2008-05-28 | 富尔西亚排气系统公司 | Double-shell manifold |
| CN201507341U (en) * | 2009-09-22 | 2010-06-16 | 武汉市澳特玛汽车配件有限责任公司 | Exhaust pipe assembly |
| CN201650413U (en) * | 2010-03-16 | 2010-11-24 | 董海臣 | Muffler for exhaust pipe of ceramic-core engine |
| CN106890927A (en) * | 2015-12-18 | 2017-06-27 | 辽宁法库陶瓷工程技术研究中心 | One kind casting ceramic air set core powder and preparation method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171010 |
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| RJ01 | Rejection of invention patent application after publication |