CN104110300B - Turbocharger - Google Patents
Turbocharger Download PDFInfo
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- CN104110300B CN104110300B CN201410385368.4A CN201410385368A CN104110300B CN 104110300 B CN104110300 B CN 104110300B CN 201410385368 A CN201410385368 A CN 201410385368A CN 104110300 B CN104110300 B CN 104110300B
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- Prior art keywords
- turbine
- dividing wall
- bypass
- flow
- turbocharger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention relates to a turbocharger, in particular to a turbocharger which has the effects of shunting and guiding because of a partition wall added onto a transition joint. The turbocharger comprises a turbine shell with a flow channel; a bypass channel which is communicated with the flow channel is formed in the turbine shell; a bypass valve is arranged on the bypass channel; the transition joint is fixedly connected with a mounting surface of the turbine shell. The turbocharger is characterized in that the partition wall is arranged on one side, connected with the turbine shell, of the transition joint, extends into an inner cavity of the turbine shell and divides the turbine shell into a central area and a peripheral area; a mounting groove is formed in the part, corresponding to the bypass valve, on the partition wall. According to the turbocharger, the bypass flux can be remarkably increased, and meanwhile, the efficiency of the turbine is basically unchanged or even slightly improved, so that the performance requirement of an engine is met.
Description
Technical field
The present invention relates to a kind of turbocharger, specifically one kind increased dividing wall on transit joint, have
Shunting and the turbocharger of guide effect.
Background technology
Turbocharger is the equipment that a kind of pressure with superatmospheric delivers the air to intake lines of combustion engines.It is common
Turbocharger mainly include exhaust-driven turbine wheel, exhaust-driven turbine wheel be arranged on turbine cylinder
The centre of gyration on, turbine cylinder is connected in the outlet of the exhaust pipe of engine.Waste gas from the exhaust pipe of engine can drive
Turbine wheel rotates, the then rotation driving of turbine wheel be located in compression case body installed in the turbine wheel shaft other end
Compressor impeller rotates.Air is compressed and is delivered to the air inlet pipe of electromotor by compressor.Turbine wheel shaft is typically by positioned at connection whirlpool
The floating bearing in middle casing and thrust bearing between turbine housing and compressor housing（Including necessary lubricating system）
Support.
As shown in Figure 1, 2, in common turbocharger, stage of turbine includes turbine cylinder 6, and turbine wheel 5 is pacified
It is mounted in turbine cylinder 6.Vortex shape inlet channel is limited between relative radial wall, and relative radial wall is arranged in turbine
Around casing body 6., around the casing center region for placing turbine wheel 5, outlet passageway is from institute for vortex shape inlet channel
State central area to stretch out.Into inlet channel high pressure exhaust gas via turbine wheel acting after flow to outlet passageway.
In addition blade is provided with inlet channel（That is nozzle vane）During with the gas flow turbine wheel for being deflected through inlet channel
Direction of rotation so as to improving turbine performance.
Turbine cylinder 6 can be constant cross-section or variable cross section.Variable-section turbomachine and constant cross-section turbine
Difference be that the size of nozzle cross-section can change, with the gas flow rates being optimal in range of mass flow, with
The power output for alloing turbine changes, to adapt to different operating modes under engine demand.For example, when being conveyed to turbine
When the volume of waste gas is relatively small, the speed for reaching turbine wheel is controlled under a certain particular value, and the value passes through
Reduce nozzle area and guarantee effective operating of turbine.Turbocharger with variable-section turbomachine is known as can
Variable section turbocharger.
The turbine of turbocharger can be provided with the valve of referred to as waste gate to control bypass passageways 9, can control whirlpool
The boost pressure and rotor speed of wheel supercharger.Waste gate valve is controlled by actuator, is opened when boost pressure exceeds predetermined value
Waste gate, so as to allow a part of waste gas to bypass turbine wheel.Generally, waste gate outlet is connected with bypass passageways 9, bypasses
Passage 9 makes bypass flow flow to turbine cylinder 6 to export, or is vented to air.Drive the actuator of waste gate valve can be with
It is electric actuator, pneumatic actuator or other actuators, but typically pneumatic actuator, the pneumatic actuator has by compressor
Compressed air-driven after impeller supercharging.
As depicted in figs. 1 and 2, its bypass valve 7 is when opening by turbine casing for common turbocharger wastegate structure
The bypass flow that 6 bypass passageways of body 9 are discharged can export direct same turbine in 10 in the turbine cylinder coupled with transit joint 8
Exhaust airstream converges, and larger disturbance is had between two strands of air-flows and turbulization, and this all can have a negative impact to bypass amount.
Secondly as into the waste gas of turbine cylinder 6 be gases at high pressure, if turbine wheel, its pressure
Substantially will not reduce.When it flow to turbine outlet, turbine wheel back pressure can be caused to raise, this can weaken turbine leaf
Therefore the workmanship ability of wheel, the efficiency of turbine also can decline.
In addition, being high-temperature gas in turbine casing body, it is basically unchanged without the gas flow temperature of turbine wheel.And flow through
Due to promoting impeller acting to consume energy, its temperature can be greatly reduced the air-flow of turbine wheel.So, when two strands of air-flows are mixed
During conjunction, there is the significant temperature difference therebetween, this can cause being significantly increased for entropy, and the increase of entropy also results in turbine efficiency
Reduction.
Chinese patent CN201310700713.4 discloses a kind of improved transit joint design.The patent provides one kind
Transit joint with dividing wall, the dividing wall is connected in transit joint inner chamber, and inner chamber bottom surface offers conduit.The transition connects
Head can postpone converging for bypass flow and gas turbine exhaust air-flow, reduction turbine back-pressure, while the conduit can make bypass
The flowing of air-flow is more smooth, weakens turbulent flow, such that it is able to realize lifting the purpose of turbine efficiency.
Although patent CN201310700713.4 proposes the transit joint design that can improve turbine efficiency, its
In do not illustrate which kind of structure can reach optimum efficiency.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of simple structure, ingenious, rational
Turbocharger, the supercharger can significantly increase bypass amount, while and can guarantee that the efficiency of turbine is basically unchanged or even has little
Width is lifted, so as to meet the performance requirement of electromotor.
According to the technical scheme that the present invention is provided：A kind of turbocharger, including the turbine cylinder with runner, in whirlpool
The bypass passageways of runner are communicated with turbine housing, and bypass valve is provided with bypass passageways, the mounting surface of turbine cylinder
On be fixedly connected with transit joint, be characterised by：The transit joint side that is connected with turbine cylinder is provided with dividing wall, the separation
Wall is stretched in turbine casing intracoelomic cavity, and turbine cylinder is divided into into central area and outer peripheral areas；The correspondence on dividing wall
Mounting groove is offered at bypass valve.
As a further improvement on the present invention, the upper port diameter of dividing wall shape cylindrical in shape, and tubular dividing wall is big
It is to be connected smoothly between lower port diameter, tubular dividing wall upper port and lower port.
As a further improvement on the present invention, the dividing wall lower end is provided with chamfering or step, turbine casing intracoelomic cavity shape
The boss of chamfer or step close fit under Cheng Youyu dividing walls.
As a further improvement on the present invention, the dividing wall and transit joint integrally connected.
As a further improvement on the present invention, the outlet of the transit joint is in the conical surface expanded from inside to outside.
As a further improvement on the present invention, the dividing wall be a cylindrical shape individual components, and cylindrical shape dividing wall connect
It is connected to transit joint lower end.
Compared with prior art, advantage is the present invention：Firstly, since the presence of dividing wall, the flow direction meeting of bypass flow
Suffer restraints, its flow direction can reduce with the angle of gas turbine exhaust main flow direction, and interference therebetween is weakened, and then turbulent flow
Also can be weakened, the flowing of bypass flow can be more smooth, and bypass flow can be significantly improved.Meanwhile, weaken turbulent flow and also may be used
Increased with reducing entropy, and entropy increase and decrease can reduce less loss in efficiency.
Secondly as the position that the presence of dividing wall, bypass flow and gas turbine exhaust main flow are converged is relatively free of separation
It is farther apart from turbine wheel for the traditional design of wall, so impeller back pressure also can be reduced relatively, and back pressure reduce can be
Raising efficiency to a certain extent.
Description of the drawings
Fig. 1 is the partial schematic sectional view of common turbocharger.
Fig. 2 is the cross-sectional schematic of the turbine casing body component in Fig. 1 and transit joint.
Fig. 3 is the cross-sectional schematic of the turbine casing body component of the present invention and transit joint.
Fig. 4 is the X-X partial sectional views in Fig. 3.
Fig. 5 ~ 7 are transit joint and dividing wall connection diagram.
Description of reference numerals：1-turbine wheel shaft, 2-pressure impeller, 3-compressor housing, 4-middle casing, 5-turbine
Impeller, 6-turbine cylinder, 7-bypass valve, 8-transit joint, 9-bypass passageways, the outlet of 10-transit joint, 11-whirlpool
Turbine housing outlets, 12-dividing wall, 13-central area, 14-outer peripheral areas, 15-boss, 16-runner, 17-installation
Groove etc..
Specific embodiment
With reference to concrete drawings and Examples, the invention will be further described.
As shown in Figure 3,4, a kind of turbocharger of the invention, including the turbine cylinder 6 with runner 16, in turbine
The bypass passageways 9 of runner 16 are communicated with housing 6, and bypass valve 7 is provided with bypass passageways 9, the installation of turbine cylinder 6
It is fixedly connected with transit joint 8 on face, the side that is connected with turbine cylinder 6 of transit joint 8 is provided with dividing wall 12, the dividing wall
12 stretch in the inner chamber of turbine cylinder 6, and turbine cylinder 6 is divided into into central area 13 and outer peripheral areas 14；It is special at some
In the case of different, because space limits, the position of dividing wall 12 and bypass valve 7 can overlap, now can be in dividing wall 12
On put mounting groove 17 corresponding to opening up at bypass valve 7；In the case of other, groove 17 is fitted without herein, as shown in Figure 7.
The shape cylindrical in shape of the dividing wall 12, and the upper port of tubular dividing wall, with diameter greater than lower port diameter, tubular separates
It is to be connected smoothly between wall upper port and lower port.
The lower end of the dividing wall 12 is provided with chamfering or step, and the inner chamber of turbine cylinder 6 is formed with and is fallen with the lower end of dividing wall 12
The boss 15 of angle or step close fit.
As shown in figure 1, the dividing wall 12 and the integrally connected of transit joint 8.
The outlet 10 of the transit joint 8 is in the conical surface expanded from inside to outside.
As shown in Figure 5,6, the dividing wall 12 is a cylindrical shape individual components, and cylindrical shape dividing wall is connected to transition and connects
8 lower ends.Fig. 5,6 show two kinds of embodiments that transit joint 8 is connected with dividing wall 12, shown in Fig. 5, on transit joint 8
Inwall for supporting dividing wall 12 has certain taper, and the above-mentioned inwall with taper extends to the outlet of transit joint 8, and
Surmount the start position of dividing wall 12.Fig. 6 shows the another way that transit joint 8 is connected with dividing wall 12, transit joint 8
Lower end has flange, and cylindrical shape dividing wall upper end has installs round platform, and transit joint 8 is connected to dividing wall by its lower end flanges
12 upper ends, and the flange of transit joint 8 is placed in the installation round platform of dividing wall 12.
As shown in Figure 3, in use, transit joint 8 is connected in the outlet(discharge) flange of turbine cylinder 6, and transition connects
Tubular dividing wall 12 on 8 is extended to inside turbine cylinder 6, and its end keeps certain axial direction and footpath with turbine cylinder
To gap, turbine cylinder outlet 11 is isolated into two pieces of independent regions by the dividing wall 12, and central area 13 is arranged for turbine
Gas air-flow passes through, and the outer peripheral areas 14 of annular are connected with bypass passageways 9, pass through for bypass flow.In the closed mode of bypass valve 7,
All waste gases from electromotor are discharged Jing central areas 13 after turbine acting；In the opening of bypass valve 7, except whirlpool
Turbine exhaust air-flow（Finger flows through the waste gas after turbine acting）Outside central area 13, some bypass flow（Refer to not
Flow through the waste gas that turbine is directly flowed to outlet by turbine inlet）Discharge from outer peripheral areas 14, bypass flow is through transit joint 8
On guiding gutter adjust direction after converge with gas turbine exhaust air-flow again.So, two strands of air-flows are relatively consistent in flow direction
Converge under state, the gas flowing of turbine cylinder outlet 11 and transit joint outlet 10 can significantly improve, such that it is able to
Bypass flow is greatly improved while slightly improving turbine efficiency.
Bypass flow can be kept apart and be carried with gas turbine exhaust air-flow using the turbocharger of the transit joint
For guide functions so that too big disturbance will not be produced therebetween when bypass flow and gas turbine exhaust air-flow are converged, from
And bigger bypass flow can be realized on the premise of without significantly sacrificing efficiency.The transit joint also contributes to improve simultaneously
The fuel economy of electromotor.
Compared with dividing wall is increased on turbine cylinder with the turbocharger for realizing isolating airflow function, using the mistake
The turbocharger weight for crossing joint is lighter, and requisite space is less, and the risk for thermal fatigue failure occur is relatively low.
The transit joint can both be designed to one piece casting type, it is also possible to be designed to dividing wall and transit joint separate machined
Molectron.The design of molectron is adapted to different bypass valve arrangement and different application conditions.
Claims (3)
1. a kind of turbocharger, including with runner（16）Turbine cylinder（6）, in turbine cylinder（6）The company of being provided with
Passage flow duct（16）Bypass passageways（9）, and in bypass passageways（9）It is provided with bypass valve（7）, turbine cylinder（6）Mounting surface
On be fixedly connected with transit joint（8）, it is characterised in that：Transit joint（8）With turbine cylinder（6）Connected side is provided with separation
Wall（12）, the dividing wall（12）Stretch into turbine cylinder（6）In inner chamber, the dividing wall（12）Its end and turbine cylinder
（6）Keep certain axially and radially gap；And by turbine cylinder（6）It is divided into central area（13）With outer peripheral areas
（14）；Central area（13）Pass through for gas turbine exhaust air-flow, the outer peripheral areas of annular（14）With bypass passageways（9）It is connected, supplies
Bypass flow passes through；The transit joint（8）Outlet（10）In the conical surface expanded from inside to outside；The dividing wall（12）For one
Cylindrical shape individual components, and cylindrical shape dividing wall is connected to transit joint（8）Lower end；The dividing wall（12）Upper port diameter
More than lower port diameter, and dividing wall（12）It is to be connected smoothly between upper port and lower port；In bypass valve（7）Close shape
State, from electromotor all waste gases by turbine acting after Jing central areas（13）Discharge；In bypass valve（7）Unlatching shape
State, except gas turbine exhaust air-flow is through central area（13）Outward, do not flow through turbine and directly the useless of outlet is flowed to by turbine inlet
Gas is from outer peripheral areas（14）Discharge, bypass flow is through transit joint（8）On guiding gutter adjust direction after again with turbine arrange
Gas air-flow converges.
2. turbocharger as claimed in claim 1, it is characterised in that：The dividing wall（12）Lower end is provided with chamfering or platform
Rank, turbine cylinder（6）Inner chamber is formed with and dividing wall（12）The boss of lower chamfer or step close fit（15）.
3. turbocharger as claimed in claim 1, it is characterised in that：The dividing wall（12）With transit joint（8）Integrally
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385368.4A CN104110300B (en) | 2014-08-06 | 2014-08-06 | Turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385368.4A CN104110300B (en) | 2014-08-06 | 2014-08-06 | Turbocharger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104110300A CN104110300A (en) | 2014-10-22 |
| CN104110300B true CN104110300B (en) | 2017-05-10 |
Family
ID=51707264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410385368.4A Active CN104110300B (en) | 2014-08-06 | 2014-08-06 | Turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104110300B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257348B (en) * | 2015-10-29 | 2017-06-23 | 无锡康明斯涡轮增压技术有限公司 | The symmetrical by-pass collar of pressure of Double flow path turbo-charger |
| JP6457977B2 (en) | 2016-06-28 | 2019-01-23 | 本田技研工業株式会社 | Turbine |
| CN106194405A (en) * | 2016-08-29 | 2016-12-07 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger bypass system |
| CN107740710B (en) * | 2017-11-15 | 2024-04-19 | 无锡康明斯涡轮增压技术有限公司 | Turbine shell structure |
| CN108869015A (en) * | 2018-08-22 | 2018-11-23 | 湖南天雁机械有限责任公司 | Bypass deflation type variable-area turbocharger |
| US11131234B2 (en) * | 2018-12-20 | 2021-09-28 | Borgwarner Inc. | Turbine housing of a turbocharger |
| CN115387866A (en) * | 2022-09-02 | 2022-11-25 | 湖南天雁机械有限责任公司 | Turbocharger and shell structure thereof |
| CN115405411A (en) * | 2022-09-30 | 2022-11-29 | 中国北方发动机研究所(天津) | Novel bleed bypass reflux structure of turbine case |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667098A (en) * | 2009-11-03 | 2012-09-12 | 霍尼韦尔国际公司 | Turbocharger with annular rotary bypass valve for the turbine |
| CN103670671A (en) * | 2013-12-19 | 2014-03-26 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1480776A3 (en) * | 1985-02-20 | 1989-05-15 | Ббц Аг Браун, Бовери Унд Ко. (Фирма) | I.c. engine turbocharger |
| GB9311584D0 (en) * | 1993-06-04 | 1993-07-21 | Holset Engineering Co | Turbo-charger |
| DE19618311A1 (en) * | 1996-05-08 | 1997-11-13 | Asea Brown Boveri | Axial flow turbine for IC-engine turbocharger |
| CN102619617A (en) * | 2012-02-29 | 2012-08-01 | 康跃科技股份有限公司 | Multi-layer variable geometric volute device |
| CN204113442U (en) * | 2014-08-06 | 2015-01-21 | 无锡康明斯涡轮增压技术有限公司 | Turbosupercharger |
-
2014
- 2014-08-06 CN CN201410385368.4A patent/CN104110300B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667098A (en) * | 2009-11-03 | 2012-09-12 | 霍尼韦尔国际公司 | Turbocharger with annular rotary bypass valve for the turbine |
| CN103670671A (en) * | 2013-12-19 | 2014-03-26 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104110300A (en) | 2014-10-22 |
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