CN109386319A - A kind of Double flow path turbo-charger volute of mixed-flow - Google Patents
A kind of Double flow path turbo-charger volute of mixed-flow Download PDFInfo
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- CN109386319A CN109386319A CN201710659228.5A CN201710659228A CN109386319A CN 109386319 A CN109386319 A CN 109386319A CN 201710659228 A CN201710659228 A CN 201710659228A CN 109386319 A CN109386319 A CN 109386319A
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- Prior art keywords
- volute
- flow
- turbine
- cylinder
- mixed
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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
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The present invention relates to mixed flow turbine technical fields, the Double flow path turbo-charger volute of especially a kind of mixed-flow, including volute, and mixed flow turbine is arranged on the inside of volute, the volute is internally provided with inclined dual channel, and dual channel is not orthogonal to mixed flow turbine, the turbine wheel of air-flow outgassing direction alignment mixed flow turbine in the dual channel, and the distribution that turbine wheel is located on the downside of dual channel is provided with inclination angle, the dual channel has been respectively communicated with two groups of exhaust steam passages, wherein one group of exhaust steam passage is communicated with the first cylinder and the 4th cylinder, another set exhaust steam passage is communicated with the second cylinder and third cylinder, and flange face is provided between exhaust steam passage.The inclination angle of the outgassing direction alignment mixed flow turbine of volute flow passage interior air-flow is conducive to the interior flow field for improving impeller, prevents the air-flow generated at wheel rim separation, promote the through-current capability of impeller by the dual channel volute of the present invention based on mixed flow turbine.
Description
Technical field
The present invention relates to the Double flow path turbo-charger volutes of mixed flow turbine technical field more particularly to a kind of mixed-flow.
Background technique
Continuous improvement with automobile industry development to Vehicular internal combustion engine dynamic property, economy and emission request, exhaust gas whirlpool
Wheel booster almost becomes the components that Vehicular internal combustion engine must be equipped with.Turbocharging technology improve internal combustion engine specific power and
Fuel economy, reduction discharge etc. played an important role, and turbocharging is increasingly becoming Vehicular internal combustion engine field most
One of main developing direction.
In recent years, the manufacture and technological development of exhaust-driven turbo-charger exhaust-gas turbo charger achieve biggish development.Current automobile-used turbine
Booster is widely used radial turbine, and radial turbine structure is simple, at low cost, good reliability, and size is small, with higher
Efficiency, technology have evolved to very high level.However radial-flow turbocharger also has its geneogenous disadvantage: working as exhaust gas
When circulation is big, not only discharge loss is excessive at turbine outlet, and occurs vortex dead zone in impeller passage, causes
Exhaust gas mobility status deteriorates, and increases flow losses, compromises the performance of higher specific speed radial turbine, reduce radial turbine
The efficiency of booster.In the case, it also just comes into being to the research of combined flow turbine.Mixed flow turbine is unique due to its
Impeller construction, the vortex dead zone specific run off formula at impeller outlet significantly reduces, so that the effective area at impeller outlet is expanded,
With biggish through-current capability；The discharge loss for advantageously reducing turbine improves the efficiency of turbine.How mixed flow turbine is applied
Charging efficiency is improved, conceptual phase is come into.
Start when just starting, do not generated many exhaust gas, secondary speed is low, and booster does not generate preferably
Supercharging effect, this is the reason of efficiency of vent oxidation catalyst difference.Efficiency of vent oxidation catalyst difference is that booster is intrinsic
Characteristic, cannot be completely eliminated, the influence to driver behavior can only be reduced by specific technological means.With turbocharging
Device develops to high revolving speed, miniaturization, and the problem of efficiency of vent oxidation catalyst difference is urgently to be resolved.In this regard, countries in the world
The manufacture of turbocharger and researcher are carrying out extensive and in-depth research.
Summary of the invention
The purpose of the present invention is to solve the disadvantages of efficiency of vent oxidation catalyst difference existing in the prior art, and
A kind of Double flow path turbo-charger volute of the mixed-flow proposed.
To achieve the goals above, present invention employs following technical solutions:
A kind of Double flow path turbo-charger volute of mixed-flow, including volute are designed, and mixed flow turbine is arranged in volute
Side, the volute is internally provided with inclined dual channel, and dual channel is not orthogonal to mixed flow turbine, the air-flow in the dual channel
Outgassing direction is directed at the turbine wheel of mixed flow turbine, and the distribution that turbine wheel is located on the downside of dual channel is provided with inclination angle, institute
It states dual channel and has been respectively communicated with two groups of exhaust steam passages, wherein one group of exhaust steam passage is communicated with the first cylinder and the 4th cylinder, in addition
One group of exhaust steam passage is communicated with the second cylinder and third cylinder, and flange face is provided between exhaust steam passage.
Preferably, the exhaust steam passage is made of two exhaust manifolds, and each exhaust manifold is connected to a cylinder.
Preferably, the volute design of the exhaust manifold, flange face and turbocharger is monolithic construction.
A kind of Double flow path turbo-charger volute of mixed-flow proposed by the present invention, beneficial effect are:
1. the outgassing direction of volute flow passage interior air-flow is aligned by the dual channel volute of the present invention based on mixed flow turbine
The inclination angle of mixed flow turbine makes the outgassing direction of air-flow be directed at the inclination angle of mixed flow turbine.The structure of oblique runner designs, can be with
So that the air-flow in runner is well adapted for the variation of blade profile, be gently transitioned into outlet, gives full play to the spy of combined flow turbine
Property.The interior flow field for being conducive to improve impeller prevents the air-flow generated at wheel rim separation, promotes the through-current capability of impeller.
Advantageously reduce the discharge loss of turbine, it is ensured that mixed flow turbine is still able to maintain high turbine in higher specific speed, wide operating range
Efficiency.
2. the dual channel volute of the present invention based on mixed flow turbine divides the adjacent cylinder exhaust pipeline of firing interval
At two groups, turbine is respectively driven, biggish pulse pressure-charging can be generated in the case where pressure wave superposition, thus more
Good utilizes exhaust gas kinetic energy.When engine load changes, the variation of delivery temperature and pressure can be quickly passed to turbine,
Make booster compared with the variation of fast-response engine load.The transient response of engine be improved significantly, so as to improve engine
Accelerating performance and torque characteristics.Sluggishness when turbocharger low speed has been effectively relieved in dual channel volute of the present invention
Property, it ensure that power output of the engine under very low speed.Dual channel volute of the present invention is adjacent by firing interval
Cylinder exhaust pipeline is divided into two groups, prevents exhaust gas recirculation to other cylinders, the pulse resonance of exhaust gas is avoided to influence the row of other cylinders
Gas efficiency, not by interference effect, the air inlet of each cylinder is vented more for the intake and exhaust of two adjacent cylinders of such firing interval
Sufficiently, to effectively improve the efficiency of engine.
3. the dual channel volute of the present invention based on mixed flow turbine is by the exhaust manifold and turbocharger of engine
It is monolithic construction.The volute of monolithic construction increases the area of carrying flange face, improves the structure of turbocharger
Intensity, it is possible to prevente effectively from supercharger volute air inlet flange fracture failure, the volute design of monoblock type keep structure more simple,
It is dismounted when installation and maintenance more convenient.
Detailed description of the invention
Fig. 1 is a kind of schematic cross-sectional view of the Double flow path turbo-charger volute of mixed-flow proposed by the present invention；
Fig. 2 is a kind of exhaust steam passage structural representation of the Double flow path turbo-charger volute of mixed-flow proposed by the present invention
Figure；
Fig. 3 is exhaust steam passage pressue-graph before single-cylinder engine turbocharger of the invention；
Fig. 4 is pressue-graph after single-pass trace-stacking of the invention；
Fig. 5 is the superposition pressue-graph of exhaust steam passage of the present invention.
In figure: 1 volute, 11 dual channels, 12 flange faces, 13 exhaust steam passages, 14 exhaust manifolds, 2 mixed flow turbines, 21 turbine leafs
Wheel, 211 inclinations angle.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-5, the Double flow path turbo-charger volute of a kind of mixed-flow, including volute 1, and mixed flow turbine 2 is arranged
In 1 inside of volute, volute 1 is internally provided with inclined dual channel 11, and dual channel 11 is not orthogonal to mixed flow turbine 2, dual channel
The turbine wheel 21 of air-flow outgassing direction alignment mixed flow turbine 2 in 11, and turbine wheel 21 is located at point of 11 downside of dual channel
Cloth is provided with inclination angle 211, dual channel 11 be it is inclined, purpose is exactly so that the outgassing direction of air-flow is directed at mixed flow runner inclination
The inclination angle 211 of turbine 2, this special volute-turbine wheel structure type, can be such that the air-flow in runner fits well
The variation of blade profile is answered, outlet is gently transitioned into, turbine wheel 21 can be effectively prevented and export at outer diameter increase bring wheel rim
Flow shedding phenomenon makes the interior flow field of turbine wheel 21 be greatly improved, it can be ensured that mixed flow turbine is in higher specific speed, wide work
High turbine efficiency is still able to maintain when range.
Dual channel 11 has been respectively communicated with two groups of exhaust steam passages 13, wherein one group of exhaust steam passage 13 is communicated with the first cylinder and
Four cylinders, another set exhaust steam passage 13 are communicated with the second cylinder and third cylinder, in four strokes of engine air cylinder working
Only exhaust gas is discharged in instroke, then the pressure before turbocharger exhaust steam passage is only most in the instroke of cylinder
Big (Fig. 3 illustrates the pressure condition before single-cylinder engine exhaust-driven turbo-charger exhaust-gas turbo charger).
In four cylinder engine work, crankshaft rotation respective exhaust cycle of all cylinders completions after taking two turns, 720 ° of crankshaft
Four pressure waves are produced in corner, pressure wave is overlapped mutually in the process, when a certain cylinder pressure declines, next cylinder pressure
Power is increased, so that minimum pressure is obviously reduced with maximum pressure differential, pressure wave is acted on turbine for the effect meeting of superposition
Pulse also reduces therewith, and then the pulse pressure-charging in exhaust-driven turbo-charger exhaust-gas turbo charger is caused to reduce (as shown in Figure 4).
Flange face 12 is provided between exhaust steam passage 13, exhaust steam passage 13 is made of two exhaust manifolds 14, and each row
Gas manifold 14 is connected to a cylinder.
The volute 1 of exhaust manifold 14, flange face 12 and turbocharger is designed as monolithic construction, the air inlet of volute 1
Flange carries the weight of entire turbocharger, while also to receive engine and be conducted through the vibration come.And engine produces
Raw high-temp waste gas is also to enter booster by the air inlet of volute, and the temperature of volute 1 tends to exceed 700 DEG C, this
Under harsh operating condition, fracture failure can occur for 1 air inlet flange of volute, to avoid such failure mode, institute of the present invention
The dual channel volute of design by the flange face of exhaust manifold replace conventional turbocharger air inlet flange, 12, entirely carry method
The area in blue face 12 increases 3-4 times, improves the structural strength of turbocharger.
In the dual channel volute exhaust system, it is two groups that exhaust passage 13, which is divided to, as in four cylinder engine by first
Cylinder and the 4th cylinder are one group, and the second cylinder and third cylinder are one group, and the igniting according to four cylinder engine 1-3-4-2 is suitable
Sequence can generate biggish pulse pressure-charging (as shown in Figure 5) in the case where superposition, thus preferably dynamic using exhaust gas
Energy.
The exhaust manifold of conventional turbocharger is to bring together the exhaust pipe of all cylinders, after exhaust gas is collected again
It is pushed to turbine.When single cylinder operation, the pulse resonance of the exhaust gas of generation will affect the exhaust efficiency of other cylinders.Such as fruit dot
Fire is spaced two adjacent cylinder exhaust pipes and communicates, and in valve overlap, (inlet valve and exhaust valve of cylinder are all in opening state
State), it will lead to exhaust gas and flow back to previous cylinder.
Previous cylinder intake air quantity is reduced, then the general power in next circulation will decline.And of the present invention double
In runner volute exhaust system, the two neighboring cylinder exhaust channel of firing interval is separated two-by-two, in this way when third cylinder is completed
When acting is exhausted, the first cylinder is to enter suction stroke, since the exhaust pipe of the first cylinder and third cylinder is not attached to, because
The exhaust of this third cylinder will not influence the air inlet effect of the first cylinder.Light a fire in this way two adjacent cylinders intake and exhaust not by dry
Influence is related to, the intake and exhaust amount of each cylinder can be improved, to effectively improve the efficiency of engine.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of Double flow path turbo-charger volute of mixed-flow, it is characterised in that: including volute (1), and mixed flow turbine (2) is set
Set on the inside of the volute (1), the volute (1) is internally provided with inclined dual channel (11), and dual channel (11) be not orthogonal to it is mixed
It flows turbine (2), the turbine wheel (21) of air-flow outgassing direction alignment mixed flow turbine (2) in the dual channel (11), and turbine
The distribution that impeller (21) is located on the downside of dual channel (11) is provided with inclination angle (211), and the dual channel (11) has been respectively communicated with two
Group exhaust steam passage (13), wherein one group of exhaust steam passage (13) is communicated with the first cylinder and the 4th cylinder, another set exhaust steam passage
(13) it is communicated with the second cylinder and third cylinder, and is provided with flange face (12) between exhaust steam passage (13).
2. a kind of Double flow path turbo-charger volute of mixed-flow according to claim 1, which is characterized in that the exhaust gas
Channel (13) is made of two exhaust manifolds (14), and each exhaust manifold (14) is connected to a cylinder.
3. a kind of Double flow path turbo-charger volute of mixed-flow according to claim 2, which is characterized in that the exhaust
The volute (1) of manifold (14), flange face (12) and turbocharger is designed as monolithic construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710659228.5A CN109386319A (en) | 2017-08-04 | 2017-08-04 | A kind of Double flow path turbo-charger volute of mixed-flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710659228.5A CN109386319A (en) | 2017-08-04 | 2017-08-04 | A kind of Double flow path turbo-charger volute of mixed-flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109386319A true CN109386319A (en) | 2019-02-26 |
Family
ID=65413268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710659228.5A Pending CN109386319A (en) | 2017-08-04 | 2017-08-04 | A kind of Double flow path turbo-charger volute of mixed-flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738063A (en) * | 2022-04-28 | 2022-07-12 | 一汽解放汽车有限公司 | Exhaust pipe with volute, engine and vehicle |
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| JPH08303201A (en) * | 1995-05-09 | 1996-11-19 | Mitsubishi Heavy Ind Ltd | Two-port radial turbine scroll |
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| CN1392332A (en) * | 2002-08-01 | 2003-01-22 | 孙敏超 | Radial-flow type or mixed flow type turbocharger |
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| CN107023329A (en) * | 2017-04-27 | 2017-08-08 | 同济大学 | A kind of combined flow turbine supercharger heat shield with circular cone inclined-plane |
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2017
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| JPH08303201A (en) * | 1995-05-09 | 1996-11-19 | Mitsubishi Heavy Ind Ltd | Two-port radial turbine scroll |
| CN1186540A (en) * | 1995-12-07 | 1998-07-01 | 株式会社荏原制作所 | Turbine machine and manufacture thereof |
| CN1392332A (en) * | 2002-08-01 | 2003-01-22 | 孙敏超 | Radial-flow type or mixed flow type turbocharger |
| CN101050710A (en) * | 2006-04-07 | 2007-10-10 | 孙敏超 | Mixed flow type turbine vane |
| EP2123861A2 (en) * | 2008-05-20 | 2009-11-25 | Mitsubishi Heavy Industries, Ltd. | Mixed flow turbine for a turbocharger |
| CN102482990A (en) * | 2009-09-10 | 2012-05-30 | 博格华纳公司 | Exhaust-gas supply device of a turbine wheel of an exhaust-gas turbocharger |
| CN201802444U (en) * | 2010-09-14 | 2011-04-20 | 康跃科技股份有限公司 | Compound turbine device with variable cross-section |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114738063A (en) * | 2022-04-28 | 2022-07-12 | 一汽解放汽车有限公司 | Exhaust pipe with volute, engine and vehicle |
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Application publication date: 20190226 |