CN107725161A - A kind of exhaust manifold for being used for four cylinder turbogenerators - Google Patents
A kind of exhaust manifold for being used for four cylinder turbogenerators Download PDFInfo
- Publication number
- CN107725161A CN107725161A CN201711048192.3A CN201711048192A CN107725161A CN 107725161 A CN107725161 A CN 107725161A CN 201711048192 A CN201711048192 A CN 201711048192A CN 107725161 A CN107725161 A CN 107725161A
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- Prior art keywords
- flange
- otch
- exhaust
- bolt hole
- disk
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Classifications
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- 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
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention belongs to engine art, disclose a kind of exhaust manifold for being used for four cylinder turbogenerators, first flange is split type with second flange, and the first otch is formed between first flange and second flange, a breach is respectively provided with left and right sides of first otch, two breach form otch bolt hole；Second flange is split type with the 3rd flange, and the second otch is formed between second flange and the 3rd flange, and second flange is fixed with bolt respectively with the 3rd flange；3rd flange and the 4th flange are monoblock type.The present invention can solve the problem that the problem of leakage problem and each pipeline junction ftracture.
Description
Technical field
The invention belongs to engine art, and in particular to a kind of exhaust manifold for being used for four cylinder turbogenerators.
Background technology
Exhaust manifold is connected with engine cylinder block, for the exhaust of each cylinder to be put together into importing exhaust main, carries
The pipeline of difference.
Exhaust manifold is used in extremely severe hot environment, and high temperature gas flow impact frequently waits bar severe in work
Part so that exhaust manifold can gradually produce the situation of failure.Failure mode is mainly shown as exhaust manifold cracking, exhaust manifold method
Blue disk and the gas leakage of cylinder cap junction etc..When the main reason for exhaust manifold ftractures is work planted agent is generated between each pipeline
Power, it is that ring flange deforms the main reason for gas leakage.
The ring flange of existing exhaust manifold is mainly designed to monoblock type and split type.Integral flange refers to 4
The ring flange of cylinder is cast integrally, and ring flange is connected with cylinder cap by bolt.Split flange disk refers to each exhaust duct
Ring flange is independent, is connected respectively by bolt with cylinder cap.
Integral flange between each several part due to mutually supporting, it is not easy to produces thermal deformation, i.e. coupling stiffness is big, therefore method
Blue disk gas leakage risk is small.But exhaust manifold, in hot operation, the junction of each pipeline easily produces larger thermal stress,
The junction of each pipeline is caused to be also easy to produce penetrability cracking phenomena.Split flange disk can avoid above mentioned problem, but split
For formula ring flange in the case of manifold exhaust pipe is longer, flange easily produces gross distortion, causes exhaust manifold gas leak phenomenon.
How to solve the problems, such as that cracking and gas leakage are vital simultaneously, this has become a technical barrier.
The content of the invention
It is an object of the invention to provide a kind of exhaust manifold for being used for four cylinder turbocharged engines, to solve leakage problem
The problem of being ftractureed with each pipeline junction.
To realize above-mentioned technical purpose, the scheme that the present invention uses is as follows：
A kind of exhaust manifold for being used for four cylinder turbocharged engines, including four exhaust ducts and four are connected to its entrance
Inlet flange disk, one be connected to its outlet outlet(discharge) flange disk, the exhaust duct, inlet flange disk and outlet(discharge) flange disk one
Body formed, four exhaust ducts are followed successively by first row air flue, second row air flue, the 3rd exhaust duct and the 4th exhaust duct；With
The inlet flange disk of one exhaust duct connection is first flange, and the inlet flange disk being connected with second row air flue is second flange, with
The inlet flange disk of 3rd exhaust duct connection is the 3rd flange, and the inlet flange disk being connected with the 4th exhaust duct is the 4th flange；
The position that four exhaust ducts collect is between the 3rd exhaust duct and the 4th exhaust duct；The first flange and second flange
To be split type, and the first otch is formed between first flange and second flange, the first flange and second flange are close to the
The position of a kerf is equipped with a breach, and two breach form otch bolt hole；The second flange and the 3rd flange
To be split type, and the second otch is formed between second flange and the 3rd flange, the second flange is used respectively with the 3rd flange
Bolt is fixed；3rd flange and the 4th flange are monoblock type.
The junction of 3rd flange and the 4th flange, which is provided with, shares bolt hole, the 3rd flange and the 4th flange
Junction is provided with the special-shaped groove for being used for discharging internal stress.
There is an equalization point between the first flange and second flange, first otch is linear pattern, and described
One end of a kerf passes through equalization point by otch bolt hole, the other end of the first otch.
The escape of the upper surface for processing bolt hole is offered on the upper surface of the inlet flange disk.
The beneficial effects of the present invention are：
(1) closed when being worked with reference to the structure of exhaust manifold and each exhaust duct by the deformation of thermal shock, ring flange
Reason combines split-type structural and monolithic construction, and combines the mode for sharing bolt, and three kinds of differences are employed between flange
Connected mode, effectively solve the problems, such as leakage problem and each exhaust duct junction cracking；
(2) special-shaped groove is designed in the junction of Integral flange so that can ensure the basis of coupling stiffness herein
On, internal stress is discharged to greatest extent, the defects of further reducing between the 3rd exhaust duct and the 4th exhaust duct；
(3) the rational direction for arranging otch so that the stressing conditions of each flange are more reasonable；
(4) by the way of escape is processed, machining accuracy is improved, reduces difficulty of processing, make the cooperation of junction
It is closer, firm.
Brief description of the drawings
Fig. 1 is the front schematic view of the present invention；
Fig. 2 is Fig. 1 upward view.
Label in figure represents respectively：1- first row air flues, 2- second row air flues；The exhaust ducts of 3- the 3rd, 4- the 4th are vented
Road, the floors of 5- first, the floors of 6- second, 7- trislabs, 8- first flanges, 9- second flanges, the flanges of 10- the 3rd, 11- the 4th
Flange, the bolts hole of 12- first, the bolts hole of 13- second, the bolts hole of 14- the 3rd, the bolts hole of 15- the 4th, 16- otch bolts hole,
17- shares bolt hole, the otch of 18- first, the otch of 19- second, 20- special-shaped grooves, 21- escapes, 22- equalization points.
Embodiment
In order that the present invention may be better understood in those skilled in the art, with reference to the accompanying drawings and examples to this hair
Bright technical scheme further illustrates.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of exhaust manifold for being used for four cylinder turbocharged engines, including four exhaust ducts and four
The individual inlet flange disk for being connected to its entrance, an outlet(discharge) flange disk for being connected to its outlet, exhaust duct, inlet flange disk and go out
Mouth ring flange is integrally formed, and four exhaust ducts are followed successively by first row air flue 1, second row air flue 2, the 3rd exhaust duct 3 and the 4th row
Air flue 4, connected with floor between exhaust duct；The inlet flange disk being connected with first row air flue 1 is first flange 8, with second row
The inlet flange disk that air flue 2 connects is second flange 9, and the inlet flange disk being connected with the 3rd exhaust duct 3 is the 3rd flange 10, with
The inlet flange disk of 4th exhaust duct 4 connection is the 4th flange 11；The position that four exhaust ducts collect is located at the He of the 3rd exhaust duct 3
Between 4th exhaust duct 4；First flange 8 is split type with second flange 9, and is formed between first flange 8 and second flange 9
First otch 18, first flange 8 are equipped with a breach, two breach shapes with second flange 9 close to the position of the first otch 18
Into otch bolt hole 16；Second flange 9 and the 3rd flange 10 are split type, and the shape between the flange 10 of second flange 9 and the 3rd
Into the second otch 19, second flange 9 is fixed with bolt respectively with the 3rd flange 10；3rd flange 10 and the 4th flange 11 are overall
Formula.
Monoblock type mentioned here refers to the 3rd flange and the 4th flange is directly connected to as a ring flange, split type
Refer to not being directly connected to.
Present invention incorporates monoblock type and split type two kinds of forms, due to the design of otch bolt hole 16, after fixation,
One flange 8 and second flange 9 are split-type design, but share one and be used for fixed bolt.
Due to the layout feature of four exhaust ducts of the invention, as shown in figure 1, the length of first row air flue 1 is most long, second row
The length of air flue 2 is shorter, and when exhaust manifold works, the deformation quantity after first row air flue 1 is heated is maximum, due to first row air flue
1 and the deformation quantity of second row air flue 2 differ greatly, the easily cracking phenomenon of the first floor 5, the present invention in the He of first flange disk 8
Second flange disk 9 can carry out the deformation of small range, can discharge internal stress, and and can possesses higher coupling stiffness, prevents from becoming
Shape gas leakage.Second row air flue 2 and the length of the 3rd exhaust duct 3 are all shorter, and caused deformation is also smaller, it is not easy to produces gas leakage
Phenomenon, the flange 10 of second flange 9 and the 3rd is designed as split type release internal stress, prevents the second floor 6 from ftractureing.3rd exhaust
The operating temperature highest of the exhaust duct 4 of road 3 and the 4th, the 3rd flange 10 and the risk of the 4th flange 11 deformation are high in the case,
The risk that trislab 7 ftractures is also high.Approach, slightly release interior in view of the length of the 3rd exhaust duct 3 and the 4th exhaust duct 4
Stress, so being on the basis of monoblock type to be designed, to balance coupling stiffness, prevent the generation of gas leak phenomenon.
It is provided with the junction of the 3rd flange 10 and the 4th flange 11 and shares bolt hole 17, it is the 3rd method to share bolt hole 17
The flange 11 of orchid 10 and the 4th shares, and the junction of the 3rd flange 10 and the 4th flange 11 is provided with the special-shaped groove for being used for discharging internal stress
20。
Special-shaped groove 20 can discharge internal stress on the basis of coupling stiffness is ensured.In the present embodiment, except shared bolt hole
Be respectively provided with outside 17, on the 3rd flange 10 in the both sides of exhaust duct one be used for fixation bolt hole, do not exist with shared bolt hole 17
The bolt hole of side is referred to as the 3rd bolt hole 14；Also be respectively provided with 4th flange 11 in exhaust duct both sides one be used for fixation spiral shell
Keyhole, wherein being referred to as the 4th bolt hole 15 with bolt hole of the shared bolt hole 17 not in the same side.In order that special-shaped groove 20 is tried one's best
Coupling stiffness is not influenceed, it should be located at the tangent line outside of the 3rd bolt hole 14 and shared bolt hole 17, and be located at the 4th bolt hole
15 with the outside of the tangent line of shared bolt hole 17.
Special-shaped groove 20 can discharge internal stress on the basis of coupling stiffness is ensured, this conclusion is by substantial amounts of simulation
Drawn with experiment, only need special-shaped groove 20 meets above-mentioned position, as the specific size and shape of special-shaped groove 20, upper
On the basis of stating theory, according to the requirement of reality, most suitable size and shape can be found by limited experiment and analysis.
There is an equalization point 22 between first flange 8 and second flange 9, the first otch 18 is linear pattern, and the first otch
18 one end passes through equalization point 22 by otch bolt hole 16, the other end of the first otch 18.
Otch bolt hole 16 and two bolts hole are provided commonly for fixing first flange 8 in the present embodiment, wherein with otch spiral shell
Keyhole 17 is not the first bolt hole 12 in the bolt hole of the same side (using exhaust duct as object of reference), otch bolt hole 16 and other two
Individual bolt hole is provided commonly for fixing second flange 9, wherein with otch bolt hole 16 not at the same side (using exhaust duct as object of reference)
Bolt hole be the second bolt hole 13.The perpendicular bisector of first bolt hole 12 and the line of centres of the second bolt hole 13 and entrance method
The intersection point of blue disk is equalization point 22.The direction of otch is determined by equalization point 22 and otch bolt hole 16, can be most reasonable
Segmentation first flange 8 and second flange 9, ensure first flange 8 and second flange 9 be firm is fixed on cylinder cap, and make
At otch bolt hole 17 it is bolt strained more balance, rationally.
Deflection when exhaust manifold works is obtained by finite element analysis, thereby determines that the width c of the first otch 18.Together
Reason, the width b of the second otch 19 are also obtained by finite element analysis, and the second otch 19 avoids bolt hole.
The escape 21 for the upper surface in processing bolt hole is offered on the upper surface of inlet flange disk.
After escape 21 is set, the upper surface of inlet flange disk can be processed, to ensure to each bolt hole
Machining accuracy, the upper surface of inlet flange disk and the cooperation of bolt head, higher precision are more beneficial for coordinating.Meanwhile set
After escape 21, the machined surface of inlet flange disk upper surface diminishes, and is advantageous to finish.
In order to prove can be discharged in the way of the present invention to design special-shaped groove 20 on the basis of coupling stiffness is ensured
Internal stress, several comparative examples provided herein.
Embodiment 2：Compared with Example 1, the size for differing only in special-shaped groove is smaller than embodiment 1.
Comparative example 1：Compared with Example 1, the arrangement between the 3rd flange 10 and the 4th flange 11 is differed only in,
3rd flange 10 and the 4th flange 11 are designed as common monoblock type, no special-shaped groove.
Comparative example 2：Compared with Example 1, the arrangement between the 3rd flange 10 and the 4th flange 11 is differed only in,
3rd flange 10 and the 4th flange 11 are designed as monoblock type, open up special-shaped groove, but special-shaped groove has crossed the 3rd bolt hole 14 together
With the tangent line of bolt hole 17.
Comparative example 3：Compared with Example 1, the arrangement between the 3rd flange 10 and the 4th flange 11 is differed only in,
3rd flange 10 and the 4th flange 11 are designed as a split type and shared bolt hole, i.e. its structure and first flange 8 and second
Structure between flange 9 is identical.
The working condition of above-described embodiment and comparative example is analyzed, obtains following table：
| Scheme | Thermal strain amplitude (%) | Seal pressure (MPa) |
| Comparative example 1 | 0.89 | 9.6 |
| Embodiment 2 | 0.57 | 5.8 |
| Embodiment 1 | 0.48 | 5.2 |
| Comparative example 2 | 0.42 | 3.2 |
| Comparative example 3 | 0.25 | 0.9 |
| Standard value in certain exhaust manifold | Less than 0.5 | More than 5 |
Wherein, the reaction of thermal strain amplitude is anti-fatigue performance, and the smaller anti-fatigue performance of its numerical value is better, is less susceptible to out
Split；Seal pressure refers to the seal pressure between flange and cylinder cap, and its numerical value is less susceptible to more greatly gas leakage.
Comparative example 1 uses common monoblock type, and its thermal strain amplitude is too big, and cracking risk is high, and its seal pressure is long-range
In standard value, even if reduction part seal pressure, its sealing effectiveness is also fine.
Using split type, it seals seal pressure and is much smaller than other schemes comparative example 3, also much smaller than qualified standard, this
And the reason for ensureing to use monoblock type first of the invention.
Embodiment 1, embodiment 2 and comparative example 2 employ monoblock type and in the junctions of the 3rd flange and the 4th flange
The mode of special-shaped groove is set, it is found that the thermal strain amplitude and seal pressure of these three schemes avoid comparative example 1 and contrast
The extreme case of example 3.
Embodiment 1 and comparative example 2 are contrasted, it can be found that the change of seal pressure is clearly, that is to say, that special-shaped groove
Cross the 3rd bolt hole 14 and influence of the tangent line of shared bolt hole 17 to seal pressure is very big, therefore, it is necessary to assure special-shaped groove
On the outside of tangent line of the 3rd bolt hole 14 with shared bolt hole 17, the requirement of seal pressure just can guarantee that.
Embodiment 2, embodiment 1 and the three of comparative example 2 are contrasted, it is possible to find, thermal strain between embodiment 1 and embodiment 2
The change of amplitude is relatively large, and seal pressure changes but very little.That is, can be in basic guarantee by adjusting the size of special-shaped groove
Thermal strain amplitude is reduced in the case that seal pressure is constant, that is to say, that using the solution of the present invention, according to actual requirement, lead to
Cross limited experiment, you can adjustment special-shaped slot, thermal strain amplitude and seal pressure is reached optimum value, so that it discharges planted agent
The ability and sealability of power match with standard value.
Claims (4)
1. a kind of exhaust manifold for being used for four cylinder turbocharged engines, including four exhaust ducts and four are connected to its entrance
Inlet flange disk, an outlet(discharge) flange disk for being connected to its outlet, the exhaust duct, inlet flange disk and outlet(discharge) flange disk one
Shaping, four exhaust ducts are followed successively by first row air flue (1), second row air flue (2), the 3rd exhaust duct (3) and the 4th exhaust
Road (4)；The inlet flange disk being connected with first row air flue (1) is first flange (8), the entrance being connected with second row air flue (2)
Ring flange is second flange (9), and the inlet flange disk being connected with the 3rd exhaust duct (3) is the 3rd flange (10), with the 4th exhaust
The inlet flange disk of road (4) connection is the 4th flange (11)；
It is characterized in that：The position that four exhaust ducts collect is between the 3rd exhaust duct (3) and the 4th exhaust duct (4)；
The first flange (8) is split type with second flange (9), and forms first between first flange (8) and second flange (9)
Otch (18), the first flange (8) and second flange (9) are equipped with a breach close to the position of the first otch (18), and two
The individual breach forms otch bolt hole (16)；The second flange (9) is split type with the 3rd flange (10), and in the second method
The second otch (19) is formed between blue (9) and the 3rd flange (10), the second flange (9) uses spiral shell respectively with the 3rd flange (10)
Bolt is fixed；3rd flange (10) and the 4th flange (11) are monoblock type.
2. the exhaust manifold according to claim 1 for being used for four cylinder turbocharged engines, it is characterised in that：Described
The junction of three flanges (10) and the 4th flange (11), which is provided with, shares bolt hole (17), the 3rd flange (10) and the 4th flange
(11) junction is provided with the special-shaped groove (20) for being used for discharging internal stress.
3. the exhaust manifold according to claim 1 or 2 for being used for four cylinder turbocharged engines, it is characterised in that：It is described
There is an equalization point (22) between first flange (8) and second flange (9), first otch (18) is linear pattern, and described
One end of first otch (18) passes through equalization point (22) by otch bolt hole (16), the other end of the first otch (18).
4. the exhaust manifold according to claim 1 or 2 for being used for four cylinder turbocharged engines, it is characterised in that：It is described
The escape (21) of the upper surface for processing bolt hole is offered on the upper surface of inlet flange disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711048192.3A CN107725161B (en) | 2017-10-31 | 2017-10-31 | Exhaust manifold for four-cylinder turbine engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711048192.3A CN107725161B (en) | 2017-10-31 | 2017-10-31 | Exhaust manifold for four-cylinder turbine engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107725161A true CN107725161A (en) | 2018-02-23 |
| CN107725161B CN107725161B (en) | 2020-04-07 |
Family
ID=61203040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711048192.3A Active CN107725161B (en) | 2017-10-31 | 2017-10-31 | Exhaust manifold for four-cylinder turbine engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107725161B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821236A (en) * | 1994-07-07 | 1996-01-23 | Hitachi Metals Ltd | Exhaust manifold |
| CN103452633A (en) * | 2012-05-30 | 2013-12-18 | 重庆长安汽车股份有限公司 | Exhaust manifold for turbocharged engine |
| CN203655400U (en) * | 2013-11-14 | 2014-06-18 | 东风汽车公司 | High temperature resistant cast iron exhaust manifold |
| CN204060889U (en) * | 2014-08-29 | 2014-12-31 | 重庆小康工业集团股份有限公司 | Engine exhaust manifold assembly |
-
2017
- 2017-10-31 CN CN201711048192.3A patent/CN107725161B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821236A (en) * | 1994-07-07 | 1996-01-23 | Hitachi Metals Ltd | Exhaust manifold |
| CN103452633A (en) * | 2012-05-30 | 2013-12-18 | 重庆长安汽车股份有限公司 | Exhaust manifold for turbocharged engine |
| CN203655400U (en) * | 2013-11-14 | 2014-06-18 | 东风汽车公司 | High temperature resistant cast iron exhaust manifold |
| CN204060889U (en) * | 2014-08-29 | 2014-12-31 | 重庆小康工业集团股份有限公司 | Engine exhaust manifold assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107725161B (en) | 2020-04-07 |
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