CN104500156B - Volute outlet structure - Google Patents

Volute outlet structure Download PDF

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Publication number
CN104500156B
CN104500156B CN201410837712.9A CN201410837712A CN104500156B CN 104500156 B CN104500156 B CN 104500156B CN 201410837712 A CN201410837712 A CN 201410837712A CN 104500156 B CN104500156 B CN 104500156B
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China
Prior art keywords
internal diameter
outlet
volute
profile
uniform internal
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CN201410837712.9A
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CN104500156A (en
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童齐宝
谷爱国
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Wuxi Cummins Turbo Technologies Co Ltd
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Wuxi Cummins Turbo Technologies Co Ltd
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    • 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 invention belongs to the technical field of turbochargers, relates to a turbocharger volute and a vortex impeller component, and particularly relates to a volute outlet structure. The volute outlet structure comprises a volute, wherein a vortex impeller is rotationally arranged in an inner cavity of the volute; a volute outlet is formed in a shell of the volute; the front edge of a blade of the vortex impeller is arranged in the volute outlet; the inner wall of the volute outlet forms an unequal inner diameter wall surface outline. According to the volute outlet structure, the flow of the volute can be effectively improved; the efficiency is kept close to that of a basic turbine, or the difference between the efficiency of the volute and the efficiency of the turbine is kept in a relatively small range (can be up to within +/-1% of tolerance).

Description

Volute outlet structure
Technical field
The invention belongs to turbo-charger technical field, is related to turbocharger volute and whirlpool impeller assembly, specifically It is a kind of volute outlet structure.
Background technology
It is well known that turbocharger is for the pressure more than atmospheric pressure(Supercharging)Under supply air to internal combustion engine Suction jaws equipment.Conventional turbocharger includes exhaust-driven turbine wheel(Whirlpool impeller)And turbine cylinder(Snail Shell).The exhaust-driven turbine wheel is arranged on the rotatable shaft in turbine casing body, the turbine cylinder connection In the downstream of engine outlet manifold.Exhaust gas driven whirlpool impeller rotarily drives in compression case body and is arranged on the other end of axle Compressor impeller rotates.Compressor impeller delivers compressed air to electromotor suction main.
In conventional turbocharger, stage of turbine includes turbine room and whirlpool impeller, and whirlpool impeller is arranged in turbine room.Ring-type Entry is limited between the radial wall for facing, and the radial wall for facing is arranged in around turbine room.Inlet volute cloth Put around entry, exit passageway extends from turbine room.These paths are connected with room, so that allowing access into inlet Pressurised exhaust gas flow to exit passageway via whirlpool impeller by entry, and make whirlpool impeller rotation.Also it is known that passing through Blade is set in entry(Referred to as nozzle vane)Rotated towards whirlpool impeller with deflecting the gas for flowing through entry Direction and improve turbine performance.General turbine performance of passing judgment on can use mass flow, three parameters of expansion ratio and efficiency.
The turbine mass flow refers to the quality that turbine gas are flowed through in the unit interval, and the expansion ratio refers to whirlpool The absolute static pressure of turbine outlet gas in the absolute overall pressure tatio of expander inlet gas, the efficiency refers to that gas passes through stage of turbine pair Relative to gas, in stage of turbine presses the external work done of pressure ratio constant entropy expansion " stagnation pressure " is arrived " static pressure " the actual work of whirlpool impeller Part energy ratio.
The height of mass flow represents into the size of engine gas flow rate, and the height of the efficiency of turbine is direct Affect the height of oil consumption.It is well known that the size of spiral casing flow passage and whirlpool impeller and structure directly affect turbine mass flow with The height of efficiency.In general, to be used for matching traffic requirement large-sized turbocharger high more, the big electromotor of discharge capacity, and Undersized turbocharger is more used on the less electromotor of discharge capacity.The structure of other spiral casing flow passage path and whirlpool impeller Also turbine flow and efficiency can be affected in design.
In some superchargers and Engine Matching scheme, if based on the turbocharger of existing matching scheme, it is desirable to The mass flow of supercharger is improved again, or using large-sized spiral case, whirlpool impeller, or changing the design of existing product.Adopt No doubt higher quality flow can be obtained with large-sized turbocharger however it is necessary that being re-scaled with electromotor, into This high time is long, and the performance characteristics for being showed in low discharge in addition are also unknown number.Change existing product design, such as set again Meter turbine or whirlpool impeller, two kinds of designs perhaps can be rapidly achieved the purpose for improving flow still for efficiency and other works Condition does not have intuitive and reliable control method, and the construction cycle is long, high cost.Also it is exactly for existing product carries out local Low cost optimization, is to reach to change the method for flow or efficiency by changing product partial structurtes feature, but is not also had at present There is quick and easy raising mass flow and be able to maintain that the prioritization scheme of approximately equal efficiency.
In terms of existing turbocharger applications, the volute outlet fitted with whirlpool impeller is typically cylindrical outlet, inwall Face is parallel with central shaft, and internal diameter size is fixed.This parallel volute outlet internal diameter size and whirlpool impeller page top and corresponding spiral case The molded line of upper cutting is relevant.When spiral case and whirlpool impeller profile are fixed, the outlet size that this fits with whirlpool impeller is also just certain, The corresponding flow of spiral case and efficiency of generally every kind of molded line is fixed.When conversion molded line or whirlpool impeller, shell can change Become the mass flow and efficiency of turbine.But these scheme uncertain factors are more, flow and efficiency are difficult to meet simultaneously and require, Require a great deal of time and go checking with cost, the replacing of part is involved in addition, and the replacing of part sometimes can affect To the connection and assembling of whole machine.Change the gap between spiral case internal face and whirlpool impeller i.e. spiral case inlet pressure and whirlpool impeller in addition Gap between molded line changing mass flow, increase leakage rate that gap can increase between whirlpool impeller and spiral case but can be bright The aobvious efficiency for reducing turbine, is not a good method for the matching for taking into account flow and efficiency.Reduce gap to carrying High efficiency is helpful but will not increase flow, between the spiral case and whirlpool impeller profile of current most conventional turbocharger between Gap is all within 1mm.
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 Volute outlet structure, the structure can effectively improve spiral case flow and keep efficiency to be close to the turbine efficiency on basis or cause Diversity between the two is within less scope(Within ± 1% tolerance can be reached).
According to the technical scheme that the present invention is provided:A kind of volute outlet structure, it is characterised in that:Including spiral case, in spiral case Rotate in inner chamber and be provided with whirlpool impeller, volute outlet is provided with the housing of spiral case, the blade inlet edge of whirlpool impeller is placed in spiral case In outlet, the volute outlet inwall forms non-uniform internal diameter wall profile.
As a further improvement on the present invention, the non-uniform internal diameter wall profile collar extension is big, internal orifice is little.
As a further improvement on the present invention, the company of seamlessly transitting between the collar extension and internal orifice of the non-uniform internal diameter wall profile Connect, and angle is formed between non-uniform internal diameter wall profile and turbine central shaft, the angle is 0 ° ~ 15 °.
As a further improvement on the present invention, it is provided between the collar extension and internal orifice of the non-uniform internal diameter wall profile some The individual boss being ladder-like arranged.
Compared with prior art, advantage is the present invention:Product structure of the present invention is simple, it is only necessary to cut based on existing product Cut processing once, do not involve the exploitation of new die, production cost is relatively low, and the production time is short.Performance change trend stability, Flow is approximately linear relationship with outlet shapes change, is easily controlled.Relative to simple increase spiral case and whirlpool impeller profile it Between gap uniform internal diameter outlet, the present invention can keep efficiency approximately equal.
Description of the drawings
Fig. 1 is the spiral case component front view of the present invention.
Fig. 2 is the first embodiment of the present invention.
Fig. 3 is second embodiment of the present invention.
Description of reference numerals:1-whirlpool impeller, 2-spiral case, starting point, the 4-non-uniform internal diameter wall of 3-non-uniform internal diameter change Outlet, 6-archetype outlet profile, 7-blade inlet edge that profile, 5-archetype are fitted with whirlpool impeller.
Specific embodiment
With reference to concrete drawings and Examples, the invention will be further described.
As shown in Fig. 1 ~ 3, a kind of volute outlet structure of the invention, including spiral case 2, rotate in the inner chamber of spiral case 2 and be provided with Whirlpool impeller 1, is provided with volute outlet on the housing of spiral case 2, and the blade inlet edge 7 of whirlpool impeller 1 is placed in volute outlet, the snail Shell outlet inside wall forms non-uniform internal diameter wall profile 4.
The non-collar extension of uniform internal diameter wall profile 4 is big, internal orifice is little.
It is connected smoothly between the collar extension and internal orifice of the non-uniform internal diameter wall profiles 4 of Fig. 2, and non-uniform internal diameter wall profile 4 Angle is formed between turbine central shaft, the angle is 0 ° ~ 15 °.
As shown in figure 3, being provided with what several were ladder-like arranged between the collar extension and internal orifice of non-uniform internal diameter wall profile 4 Boss.
Product of the present invention is left at a distance of 10mm apart from blade inlet edge 7 on outlet inside wall face on existing spiral case subassembly product The right starting point 3 as the change of non-uniform internal diameter, does one with the non-uniform internal diameter wall wheel that the angle of archetype outlet profile 6 is 5 degree Wide 4 cutting feature.Uniform internal diameter cylindrical outlet originally becomes the horn mouth of non-uniform internal diameter, and horn mouth is extended to The outlet 5 that archetype is fitted with whirlpool impeller, the starting point 3 and non-uniform internal diameter wall profile of this bell-mouthed non-uniform internal diameter change The flow of 4 angle joint effect gas and the efficiency of spiral case.Mistake between the starting point 3 and whirlpool impeller leading edge of non-uniform internal diameter change It is slow gradual-enlargement type transition to cross, and such being designed with is beneficial to the impact to efficiency to be minimized, and adjusts impeller leading edge and arrive Internal diameter size between exit face can change flow, and larger internal diameter change can obtain higher flow.
Above description is explanation of the invention, is not limitation of the invention, and limited range of the present invention is referring to power Profit requirement, within protection scope of the present invention, can make any type of modification.
Present invention design is applied to all spiral cases, and processing is simple, low cost.Flow can to a certain extent be improved and caused The change of efficiency is in the range of acceptable closed tolerance.
Compared with prior art, advantage is the present invention:Product structure of the present invention is simple, it is only necessary to cut based on existing product Cut processing once, do not involve the exploitation of new die, production cost is relatively low, and the production time is short.Performance change trend stability, Flow is approximately linear relationship with outlet shapes change, is easily controlled.Relative to simple increase spiral case and whirlpool impeller profile it Between gap uniform internal diameter outlet, the present invention can keep efficiency approximately equal.

Claims (1)

1. a kind of volute outlet structure, including spiral case(2), in spiral case(2)Rotate in inner chamber and be provided with whirlpool impeller(1), in spiral case (2)Housing on be provided with volute outlet, whirlpool impeller(1)Blade inlet edge(7)In being placed in volute outlet, in the volute outlet Wall forms non-uniform internal diameter wall profile(4);It is characterized in that:The non-uniform internal diameter wall profile(4)Collar extension is big, internal orifice is little;
The non-uniform internal diameter wall profile(4)Collar extension and internal orifice between be connected smoothly, and non-uniform internal diameter wall profile(4) Angle is formed between turbine central shaft, the angle is 0 ° ~ 15 °;
Apart from blade inlet edge on volute outlet internal face(7)At a distance of the starting point that 10mm changes as non-uniform internal diameter(3), it is provided with one Individual and archetype outlet profile(6)Angle is 5 degree of non-uniform internal diameter wall profile(4);The starting point(3)In gas flowing side Upwards, positioned at blade inlet edge(7)Upstream;Uniform internal diameter cylindrical outlet originally becomes the horn mouth of non-uniform internal diameter, loudspeaker Mouth extends to the outlet that archetype is fitted with whirlpool impeller(5), the starting point of bell-mouthed non-uniform internal diameter change(3)With it is non-etc. Internal diameter wall profile(4)Angle joint effect gas flow and spiral case efficiency;The starting point of non-uniform internal diameter change(3)With whirlpool Transition between impeller leading edge is gradual-enlargement type transition.
CN201410837712.9A 2014-12-29 2014-12-29 Volute outlet structure Active CN104500156B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410837712.9A CN104500156B (en) 2014-12-29 2014-12-29 Volute outlet structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410837712.9A CN104500156B (en) 2014-12-29 2014-12-29 Volute outlet structure

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CN104500156A CN104500156A (en) 2015-04-08
CN104500156B true CN104500156B (en) 2017-05-17

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106401671A (en) * 2016-12-05 2017-02-15 无锡康明斯涡轮增压技术有限公司 Vortex end outlet structure with core

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510486B2 (en) * 1983-09-06 1993-02-09 Nissan Motor
DE19805476C1 (en) * 1998-02-11 1999-10-07 Daimler Chrysler Ag Exhaust gas turbocharger for an internal combustion engine
JP2007192130A (en) * 2006-01-19 2007-08-02 Toyota Motor Corp Turbocharger
JP4788631B2 (en) * 2007-03-02 2011-10-05 いすゞ自動車株式会社 Exhaust throttle valve diagnostic device and method
US20100178164A1 (en) * 2009-01-15 2010-07-15 General Electric Company System and method for turbocharging an engine
DE102009050975A1 (en) * 2009-10-28 2011-05-05 Daimler Ag Guide device for an exhaust gas turbocharger with adjustable turbine geometry and exhaust gas turbocharger for an internal combustion engine

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