CN107387171A - A kind of double scroll turbocharger - Google Patents

A kind of double scroll turbocharger Download PDF

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Publication number
CN107387171A
CN107387171A CN201710574223.2A CN201710574223A CN107387171A CN 107387171 A CN107387171 A CN 107387171A CN 201710574223 A CN201710574223 A CN 201710574223A CN 107387171 A CN107387171 A CN 107387171A
Authority
CN
China
Prior art keywords
turbine
scroll
runner
angle
turbocharger
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
Application number
CN201710574223.2A
Other languages
Chinese (zh)
Inventor
范厚传
倪计民
姜楠
王琦玮
陈沁青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongji University
Original Assignee
Tongji University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tongji University filed Critical Tongji University
Priority to CN201710574223.2A priority Critical patent/CN107387171A/en
Publication of CN107387171A publication Critical patent/CN107387171A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00Stators
    • F01D9/02Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12Control of the pumps
    • F02B37/24Control of the pumps by using pumps or turbines with adjustable guide vanes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The present invention relates to a kind of double scroll turbocharger, the turbocharger includes compressor, intermediate and the turbine shroud being sequentially connected, exhaust gas inlet and air exit are offered on the turbine shroud, inside is provided with turbine room, turbine is provided with the turbine room, the first scroll runner, the second scroll runner are provided with turbine shroud side by side, the second scroll runner is located between intermediate and the first scroll runner, and multiple guide vanes being adapted with turbine are circumferentially uniformly laid with the first scroll runner.Compared with prior art, the present invention is using double scroll structures, guide vane in first scroll runner ensure that the high efficiency of turbine, the non-blade nozzle structure of second scroll runner ensure that turbine has enough through-current capabilities, and the use of mixed flow turbine not only improves the arrangement of dual channel, and can enough lifts the through-current capability of turbine, mitigates turbo lag phenomenon, and simple in construction, good reliability.

Description

A kind of double scroll turbocharger
Technical field
The invention belongs to engine turbine supercharging technology field, is related to a kind of double scroll turbocharger.
Background technology
Turbocharging is a kind of technology using exhaust gas driven air compressor caused by internal combustion engine operation.On the engine After turbocharger is installed, compared with its peak power is not when installing turbocharger, more than 40% can be increased.Therefore, it is existing Turbocharger is equipped with increasing engine.The dynamic property and fuel oil warp of engine can be made using turbocharging technology Ji property is greatly improved, and existing medium and heavy-duty engines have been " inorganic not to be pressurized ", and the ratio of boosting type gasoline engine also exists Constantly rise.However, for the continually changing automobile engine of operating mode, turbocharger generally existing turbo lag is asked Topic, causes that automobile low speed torque is small, pickup lag.Automobile engine is in low speed and load and accelerating mode, turbocharger Turbo lag compressor pressure can be caused to reduce, engine charge deficiency, and then there is engine combustion deterioration, can not meet The torque demand of engine.
In order to solve the problems, such as turbo lag, there is variable nozzle ring booster in the market, although such booster can Alleviate turbo lag problem to a certain extent, but reliability reduction, manufacturing cost rise can be caused and safeguard that complexity etc. is asked Topic, limits its further genralrlization application.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is simple in construction and can By the good double scroll turbocharger of property.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of double scroll turbocharger, the turbocharger include compressor, intermediate and the turbine case being sequentially connected Body, exhaust gas inlet and air exit are offered on the turbine shroud, inside is provided with to be connected with exhaust gas inlet, air exit respectively Turbine room, is provided with turbine in the turbine room, side by side provided with the first scroll runner, the second scroll stream in described turbine shroud Road, the second scroll runner are located between intermediate and the first scroll runner, and described exhaust gas inlet is respectively through the first scroll stream Road, the second scroll runner are connected with turbine room, and multiple and turbine is circumferentially uniformly laid with the first described scroll runner The guide vane being adapted.
As preferable technical scheme, described guide vane is located at the nozzle exit of the first scroll runner.First whirlpool Waste gas in pipe runner enters in turbine, and push away along corresponding guide vane respectively under the guide functions of multiple guide vanes Dynamic turbine rotation, has been effectively ensured the uniform force of turbine, has improved the response speed and operating efficiency of turbine, alleviate whirlpool Take turns hysteresis phenomenon.
Described guide vane is fixedly connected with turbine shroud.Using fixed guide vane, guide vane is simplified Processing and assembling process, and then the overall structure of turbocharger is simplified, good reliability, reduce maintenance cost.
Multiple guide vanes are concyclic, and the angle between described guide vane and corresponding circular arc tangential line is 25- 75°.By being controlled to the setting angle of guide vane, the waste gas at importing turbine can be made to be easier to promote turbine to turn It is dynamic, so as to effectively mitigate turbo lag phenomenon, response time and acceleration capacity when improving low engine speeds, realize good Pressurized effect.
Central dividing plate, the central dividing plate and turbine shroud are provided between described the first scroll runner and the second scroll runner Axis between angle be 30-90 °.Central dividing plate by the scroll runner of turbocharger be divided into the first scroll runner and Second scroll runner.The outer end of central dividing plate is fixedly connected with turbine shroud, inner to be tilted to air exit direction, is advantageous to give up The smooth outflow of gas.
Described turbine is mixed flow turbine.Mixed flow turbine not only improves the arrangement of double scroll runners, and and can enough lifts turbine Through-current capability.
Described turbine includes turbine wheel shaft and multiple turbo blades being circumferentially uniformly laid on turbine wheel shaft, described The inner of turbo blade is fixedly connected with turbine wheel shaft, and outer end is adapted with the first scroll runner, the second scroll runner respectively.
The outer end of described turbo blade include the turbo blade small inclination portion that is adapted with the first scroll runner and with The axis of the turbo blade high inclination-angle portion that second scroll runner is adapted, described turbo blade small inclination portion and turbine wheel shaft it Between angle be less than angle between turbo blade high inclination-angle portion and the axis of turbine wheel shaft.
Angle between described turbo blade small inclination portion and the axis of turbine wheel shaft is 0-30 °, described turbine leaf Angle between piece high inclination-angle portion and the axis of turbine wheel shaft is 0-90 °.
Heat shield is provided between described intermediate and turbine shroud.
Described heat shield is provided with the heat shield transition part being adapted with the second scroll runner and turbine.Heat shield transition Portion can make heat shield in the case where guarantee is heat-insulated, turn avoid the interference to waste gas flowing.The inwall of second scroll runner, Heat shield transition part and turbine wheel shaft outer wall are smoothly connected, and ensure that the waste gas in the second scroll runner swimmingly enters in turbine room.
As preferable technical scheme, the entrance of the first described scroll runner is provided with exhaust gas bypass structure.By waste gas Logical structure can avoid hypertonia before the whirlpool of the first scroll runner.
As preferable technical scheme, the radial section of the first described scroll runner accumulates the radial direction of the≤the second scroll runner Sectional area.The radial section product of first scroll runner is smaller, when engine speed is relatively low, pressure at expulsion is smaller, can increase Pressure at turbine, so as to more easily promote turbine rotation, effectively mitigate turbo lag phenomenon, improve low turn of engine Responding ability and acceleration capacity when fast;The radial section product of second scroll runner is larger, when engine speed is higher, exhaust pressure When power is larger, it can ensure that turbine has enough through-current capabilities.
The present invention is in practical application, waste gas caused by internal combustion engine operation respectively enters the first scroll stream through exhaust gas inlet In road, the second scroll runner, the waste gas in the first scroll runner is under the guide functions of guide vane, respectively along corresponding water conservancy diversion Blade enters in turbine, and promotes turbine rotation together with the waste gas with entering through the second scroll runner in turbine room, afterwards by arranging Gas outlet discharge.
Compared with prior art, the invention has the characteristics that:
1) using double scroll structures, the guide vane in the first scroll runner ensure that the high efficiency of turbine, the second scroll The non-blade nozzle structure of runner ensure that turbine has enough through-current capabilities, and the use of mixed flow turbine not only improves dual channel Arrangement, and can enough lift the through-current capability of turbine, mitigate turbo lag phenomenon;
2) in the guide vane nozzle in the first scroll runner and the second scroll runner non-blade nozzle associated working, make whirlpool Wheel produces two different turbine inflow angles of attack, and turbo lag problem can be effectively improved under different operating modes, improves turbine The efficiency and through-current capability of booster, meet the air inlet demand of engine, with the turbocharging provided with variable-vane nozzle arrangements Device is compared, simple in construction, good reliability of the invention.
Brief description of the drawings
Fig. 1 is the cross-sectional view of turbocharger in embodiment 1;
Fig. 2 is the cross-sectional view of the first scroll runner in embodiment 1;
Fig. 3 is the cross-sectional view of turbine shroud in embodiment 1;
Fig. 4 is the cross-sectional view of turbine in embodiment 1;
Fig. 5 is the cross-sectional view of heat shield in embodiment 1;
Description of symbols in figure:
1-compressor, 2-intermediate, 3-turbine shroud, the 4-the first scroll runner, the 5-the second scroll runner, 6-in Space bar, 7-guide vane, 8-turbo blade small inclination portion, 9-turbo blade high inclination-angle portion, 10-exhaust gas inlet, 11- Air exit, 12-turbine, 13-heat shield, 1301-heat shield transition part, 14-turbine room, 15-turbine wheel shaft, 16-whirlpool Angle, β-turbo blade high inclination-angle portion and the whirlpool of impeller blade, α-between turbo blade small inclination portion and the axis of turbine wheel shaft The angle between angle, γ-guide vane and corresponding circular arc tangential line, θ-central dividing plate between the axis of wheel shaft with Angle between the axis of turbine shroud.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to Following embodiments.
Embodiment 1:
A kind of double scroll turbocharger as shown in Figure 1, compressor 1 that the turbocharger includes being sequentially connected, in Mesosome 2 and turbine shroud 3, offer exhaust gas inlet 10 and air exit 11 on the turbine shroud 3, inside be provided with respectively with waste gas The turbine room 14 that import 10, air exit 11 are connected, the turbine room 14 is interior to be provided with turbine 12, is provided with side by side in turbine shroud 3 First scroll runner 4, the second scroll runner 5, the second scroll runner 5 are located between the scroll runner 4 of intermediate 2 and first, give up Gas import 10 is connected through the first scroll runner 4, the second scroll runner 5 with turbine room 14 respectively.
As shown in Fig. 2 multiple guide vanes being adapted with turbine 12 are circumferentially uniformly laid with the first scroll runner 4 7.Guide vane 7 is fixedly connected with turbine shroud 3.Multiple guide vanes 7 are concyclic, and guide vane 7 and corresponding circular arc Angle γ=50 ° between tangent line.
As shown in figure 3, be provided with central dividing plate 6 between the first scroll runner 4 and the second scroll runner 5, the central dividing plate 6 with Angle theta=70 ° between the axis of turbine shroud 3.
As shown in figure 4, turbine 12 is mixed flow turbine, turbine 12 includes turbine wheel shaft 15 and multiple is circumferentially uniformly laid in Turbo blade 16 on turbine wheel shaft 15, turbo blade 16 the inner be fixedly connected with turbine wheel shaft 15, outer end respectively with the first scroll Runner 4, the second scroll runner 5 are adapted.The outer end of turbo blade 16 includes the turbo blade being adapted with the first scroll runner 4 Small inclination portion 8 and the turbo blade high inclination-angle portion 9 being adapted with the second scroll runner 5, turbo blade small inclination portion 8 and turbine Angle between the axis of axle 15 is less than the angle between turbo blade high inclination-angle portion 9 and the axis of turbine wheel shaft 15.Turbine Angle α=5 ° between blade small inclination portion 8 and the axis of turbine wheel shaft 15, turbo blade high inclination-angle portion 9 and turbine wheel shaft 15 Angle β=75 ° between axis.
Heat shield 13 is provided between intermediate 2 and turbine shroud 3.As shown in figure 5, heat shield 13 is provided with and the second scroll The heat shield transition part 1301 that runner 5 and turbine 12 are adapted.
In practical application, waste gas caused by internal combustion engine operation respectively enters the first scroll runner 4, through exhaust gas inlet 10 In two scroll runners 5, the waste gas in the first scroll runner 4 is under the guide functions of guide vane 7, respectively along corresponding water conservancy diversion leaf Piece 7 enters in turbine 12, and promotes turbine 12 to rotate together with the waste gas with entering through the second scroll runner 5 in turbine room 14, it Discharged afterwards by air exit 11.
Embodiment 2:
In the present embodiment, angle γ=25 ° between guide vane 7 and corresponding circular arc tangential line, central dividing plate 6 and whirlpool Take turns angle theta=90 ° between the axis of housing 3, the angle between turbo blade small inclination portion 8 and the axis of turbine wheel shaft 15 α=0 °, angle β=1 ° between turbo blade high inclination-angle portion 9 and the axis of turbine wheel shaft 15, remaining is the same as embodiment 1.
Embodiment 3:
In the present embodiment, angle γ=75 ° between guide vane 7 and corresponding circular arc tangential line, central dividing plate 6 and whirlpool Take turns angle theta=30 ° between the axis of housing 3, the angle between turbo blade small inclination portion 8 and the axis of turbine wheel shaft 15 α=30 °, angle β=90 ° between turbo blade high inclination-angle portion 9 and the axis of turbine wheel shaft 15, remaining is the same as embodiment 1.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using invention. Person skilled in the art obviously can easily make various modifications to these embodiments, and described herein general Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability Field technique personnel do not depart from improvement that scope made and modification all should be the present invention's according to the announcement of the present invention Within protection domain.

Claims (10)

1. a kind of double scroll turbocharger, the turbocharger includes compressor (1), intermediate (2) and the whirlpool being sequentially connected Take turns housing (3), offer exhaust gas inlet (10) and air exit (11) on the turbine shroud (3), inside be provided with respectively with waste gas The turbine room (14) that import (10), air exit (11) are connected, the turbine room (14) is interior to be provided with turbine (12), and its feature exists In side by side provided with the first scroll runner (4), the second scroll runner (5), the second scroll runner in described turbine shroud (3) (5) between intermediate (2) and the first scroll runner (4), described exhaust gas inlet (10) is respectively through the first scroll runner (4), the second scroll runner (5) is connected with turbine room (14), is circumferentially uniformly laid with the first described scroll runner (4) Multiple guide vanes (7) being adapted with turbine (12).
A kind of 2. double scroll turbocharger according to claim 1, it is characterised in that described guide vane (7) with Turbine shroud (3) is fixedly connected.
A kind of 3. double scroll turbocharger according to claim 1, it is characterised in that multiple guide vanes (7) are concyclic, And the angle between described guide vane (7) and corresponding circular arc tangential line is 25-75 °.
A kind of 4. double scroll turbocharger according to claim 1, it is characterised in that the first described scroll runner (4) be provided with central dividing plate (6) between the second scroll runner (5), the axis of the central dividing plate (6) and turbine shroud (3) it Between angle be 30-90 °.
5. a kind of double scroll turbocharger according to claim 1, it is characterised in that described turbine (12) is mixed flow Turbine.
6. a kind of double scroll turbocharger according to claim 5, it is characterised in that described turbine (12) includes whirlpool Wheel shaft (15) and multiple turbo blades (16) being circumferentially uniformly laid on turbine wheel shaft (15), described turbo blade (16) The inner be fixedly connected with turbine wheel shaft (15), outer end is adapted with the first scroll runner (4), the second scroll runner (5) respectively.
7. a kind of double scroll turbocharger according to claim 6, it is characterised in that described turbo blade (16) Outer end includes the turbo blade small inclination portion (8) being adapted with the first scroll runner (4) and mutually fitted with the second scroll runner (5) The turbo blade high inclination-angle portion (9) matched somebody with somebody, the folder between described turbo blade small inclination portion (8) and the axis of turbine wheel shaft (15) Angle is less than the angle between turbo blade high inclination-angle portion (9) and the axis of turbine wheel shaft (15).
A kind of 8. double scroll turbocharger according to right wants 7, it is characterised in that described turbo blade small inclination portion (8) angle between the axis of turbine wheel shaft (15) is 0-30 °, described turbo blade high inclination-angle portion (9) and turbine wheel shaft (15) the angle between axis is 0-90 °.
9. a kind of double scroll turbocharger according to claim 1, it is characterised in that described intermediate (2) and whirlpool Heat shield (13) is provided between wheel housing (3).
10. a kind of double scroll turbocharger according to claim 9, it is characterised in that on described heat shield (13) Provided with the heat shield transition part (1301) being adapted with the second scroll runner (5) and turbine (12).
CN201710574223.2A 2017-07-14 2017-07-14 A kind of double scroll turbocharger Pending CN107387171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710574223.2A CN107387171A (en) 2017-07-14 2017-07-14 A kind of double scroll turbocharger

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Application Number Priority Date Filing Date Title
CN201710574223.2A CN107387171A (en) 2017-07-14 2017-07-14 A kind of double scroll turbocharger

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109695695A (en) * 2018-12-17 2019-04-30 广州市昊志机电股份有限公司 A kind of pneumatic turntable of built-in harmonic speed reducer
CN110735673A (en) * 2019-11-18 2020-01-31 大连海事大学 kinds of double-channel volute
CN111102063A (en) * 2019-11-15 2020-05-05 车行天下网络科技股份有限公司 Dual drive turbine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217470A1 (en) * 2002-04-19 2003-11-06 Daimler Chrysler Ag Exhaust turbine for variable turbocharger for engine brake operation of IC engines, with blade angle of turbine wheel blades varied so that turbine efficiency is smaller in nominal brake pint than the optimum
DE102007036937A1 (en) * 2007-08-04 2009-02-05 Daimler Ag Exhaust gas turbocharger for a reciprocating internal combustion engine
US20110079009A1 (en) * 2008-04-24 2011-04-07 Krätschmer Stephan Turbocharger for an Internal combustion engine of a motor vehicle and internal combustion engine
CN104153873A (en) * 2013-05-08 2014-11-19 福特环球技术公司 Internal combustion engine with deactivatable cylinder, and method for operating an internal combustion engine of said type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217470A1 (en) * 2002-04-19 2003-11-06 Daimler Chrysler Ag Exhaust turbine for variable turbocharger for engine brake operation of IC engines, with blade angle of turbine wheel blades varied so that turbine efficiency is smaller in nominal brake pint than the optimum
DE102007036937A1 (en) * 2007-08-04 2009-02-05 Daimler Ag Exhaust gas turbocharger for a reciprocating internal combustion engine
US20110079009A1 (en) * 2008-04-24 2011-04-07 Krätschmer Stephan Turbocharger for an Internal combustion engine of a motor vehicle and internal combustion engine
CN104153873A (en) * 2013-05-08 2014-11-19 福特环球技术公司 Internal combustion engine with deactivatable cylinder, and method for operating an internal combustion engine of said type

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109695695A (en) * 2018-12-17 2019-04-30 广州市昊志机电股份有限公司 A kind of pneumatic turntable of built-in harmonic speed reducer
CN111102063A (en) * 2019-11-15 2020-05-05 车行天下网络科技股份有限公司 Dual drive turbine
CN110735673A (en) * 2019-11-18 2020-01-31 大连海事大学 kinds of double-channel volute

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Application publication date: 20171124

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