EP3298285B1 - Leitschaufel für einen diffusor eines radialverdichters - Google Patents

Leitschaufel für einen diffusor eines radialverdichters Download PDF

Info

Publication number: EP3298285B1
Authority: EP; European Patent Office
Prior art keywords: diffuser; guide vane; compressor; vane; guide
Prior art date: 2015-05-20
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.): Active

Application number

EP16721363.6A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP3298285A1 (de

Inventor

Michael Wöhr

Markus Mueller

Elias Chebli

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.)

Mercedes Benz Group AG

Original Assignee

Daimler AG

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.)

2015-05-20

Filing date

2016-05-10

Publication date

2019-04-03

2016-05-10 Application filed by Daimler AG filed Critical Daimler AG

2018-03-28 Publication of EP3298285A1 publication Critical patent/EP3298285A1/de

2019-04-03 Application granted granted Critical

2019-04-03 Publication of EP3298285B1 publication Critical patent/EP3298285B1/de

Status Active legal-status Critical Current

2036-05-10 Anticipated expiration legal-status Critical

Links

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230000001934 delay Effects 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
238000005259 measurement Methods 0.000 description 1
210000002435 tendon Anatomy 0.000 description 1
230000008719 thickening Effects 0.000 description 1
238000011144 upstream manufacturing Methods 0.000 description 1

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
- 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
- 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
- F05D2250/00—Geometry
- F05D2250/10—Two-dimensional
- F05D2250/14—Two-dimensional elliptical
- 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
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet

Definitions

the invention relates to a guide vane for a diffuser of a centrifugal compressor according to the preamble of patent claim 1.
the radial compressor usually has a receiving region in which a compressor wheel of the centrifugal compressor can be received or, in the finished state of the radial compressor, is accommodated. Furthermore, the radial compressor has a downstream of the receiving region arranged diffuser, which extends, for example, at least substantially in the radial direction. During operation of the centrifugal compressor air is compressed by means of the compressor wheel, which flows off the compressor and flows through the diffuser.
the aforementioned guide vane can be arranged in the diffuser designed, for example, as a radial diffuser, or-in the ready-made state of the radial compressor-is arranged and serves to guide the air flowing through the diffuser.
the guide vane on a skeleton line, wherein the guide vane may be formed, for example, as a wing profile.
a plurality of guide vanes are arranged in the diffuser, which are arranged in the circumferential direction of the compressor wheel over its circumference successively.
a guide is formed, which is also referred to as Nachleitgitter.
the guide is namely arranged in the flow direction of the air downstream of the compressor wheel or the receiving area and provides advantageous flow conditions in the diffuser.
the WO 2006/053579 A1 a turbocharger with a turbine, which comprises a turbine wheel and a guide grid arranged upstream of the turbine wheel with a plurality of guide vanes.
Conventional guide vanes which are used in conventional centrifugal compressors and are arranged or can be arranged in the diffuser, have blade geometries, which lead to unfavorable and thus unfavorable flow conditions in the diffuser.
a blade geometry is, for example, a geometry in the form of a profile drop, which leads to a strong constriction of a flow channel through which air can flow, so that only a small maximum mass flow of the air can flow through the flow channel.
Another blade geometry is the so-called NACA profile, which is optimized for aircraft wings, but ensures high losses in the diffuser.
Another blade geometry is the so-called wedge blade, which leads to high losses due to a sudden increase in channel diameter at the blade end.
the respective guide blade is designed, for example, as a straight blade of constant thickness, this leads to an undesirably strong delay in the flow of the air, resulting in high losses.
Another blade geometry is the so-called circular arc geometry with constant thickness. In this case, there is an insufficiently high number of free geometry parameters and this blade geometry leads to strong delays, in particular in the middle part of the guide blade.
Object of the present invention is therefore to develop a guide vane of the type mentioned in such a way that particularly advantageous flow conditions can be realized in the diffuser.
the entire skeleton line ie along its entire extent, is elliptical. Because of the engagement a vane having an elliptical skeleton line, an at least nearly uniform deceleration in a flow channel at least partially delimited by the vane can be realized without excessive constriction at the leading edge of the vane.
the use of a vane with an elliptical skeleton line provides a high degree of free geometry parameters.
the invention also includes a radial compressor, in particular for an exhaust gas turbocharger of an internal combustion engine, having a receiving area for a compressor wheel of the centrifugal compressor, with a diffuser arranged downstream of the receiving area, and with at least one guide vane according to the invention arranged in the diffuser.
the diffuser itself is a flow channel through which air can pass, the air being compressed by means of the compressor wheel, flowing off the compressor wheel and flowing through the diffuser. Because the guide vane has an at least substantially elliptical skeleton line, particularly advantageous flow conditions can be realized in the diffuser without undue disadvantages, so that a particularly efficient operation of the radial compressor can be realized.
the drawing shows in the single figure a schematic sectional view of a guide vane for a downstream of a receiving area for a compressor wheel arranged diffuser of a centrifugal compressor, with a skeleton line, which is elliptical in at least a partial region.
the FIGURE shows a schematic sectional view of a generally designated 10 guide vane for a downstream of a receiving area for a compressor wheel arranged diffuser of a centrifugal compressor.
the radial compressor is preferably part of an exhaust gas turbocharger, with which an example designed as a reciprocating internal combustion engine internal combustion engine of a motor vehicle Is provided.
the internal combustion engine is designed to drive off the motor vehicle and comprises a exhaust tract of the internal combustion engine through which can flow exhaust tract and an air-flowable intake tract.
the intake tract By means of the intake tract, the air flowing through the intake tract is guided into at least one combustion chamber, in particular cylinder, of the internal combustion engine.
the exhaust gas turbocharger has a turbine, which is arranged in the exhaust tract and can be driven by the exhaust gas.
the turbine comprises a turbine housing and a turbine wheel arranged in the turbine housing, which can be driven by the exhaust gas.
the turbine wheel is rotatable about an axis of rotation relative to the turbine housing and part of a rotor of the exhaust gas turbocharger.
the rotor further comprises the aforementioned compressor wheel and a shaft to which the turbine wheel and the compressor are rotatably connected.
the compressor wheel can be driven by the turbine wheel via the shaft, so that - during the operation of the radial compressor - air is compressed by means of the compressor wheel.
energy contained in the exhaust gas can be used to compress the air.
the centrifugal compressor is arranged in the intake tract and comprises a compressor housing in which the compressor wheel is arranged.
the compressor wheel or the rotor is rotatable about said rotation axis relative to the compressor housing.
Said receiving region, in which the compressor wheel is arranged, is limited by the compressor housing.
the radial compressor further comprises the aforementioned diffuser, which is arranged in the flow direction of the air through the radial compressor downstream of the receiving region and thus of the turbine wheel.
the diffuser is a channel which can be flowed through by the air compressed by the compressor wheel and flowing away from the compressor wheel or through which flows during operation of the centrifugal compressor.
the diffuser is designed as a radial diffuser, wherein the diffuser extends at least substantially in the radial direction.
the centrifugal compressor further comprises a guide, which is also referred to as Nachleitgitter.
the guide device comprises a plurality of guide vanes arranged in the diffuser and thus downstream of the receiving region or the compressor wheel, of which the guide vane designated by 10 is shown in the FIG.
the vanes arranged in the diffuser serve to guide the air flowing through the diffuser so that advantageous flow conditions are realized in the diffuser can be.
the previous and following versions of the guide vane 10 can be readily transferred to the other vanes of the secondary lattice.
the vane 10 has a skeleton line X.
the entire skeleton line X is elliptical in shape. This means that the skeleton line X is elliptical, that is, formed as part of an ellipse along its entire extension.
the figure also shows a diagram 12, which is used as an auxiliary diagram for constructing the skeleton line X.
the skeleton line X of the guide vane 10 is constructed as an ellipse with an elliptical thickening over the length of the chord C of the guide vane 10.
the guide blade 10 has a blade inlet 14, via which the guide blade 10 is impinged by the air during operation of the radial compressor.
the guide vane 10 has a vane outlet 16, via which the air flows off the vane 10.
the blade inlet 14 and the blade outlet 16 intersect a common straight line and thus define the chord C.
the skeleton line X is formed elliptical, the skeleton line X is also referred to below as an ellipse.
the ellipse has exactly two intersecting angles with the chord C, wherein the intersection angle of the ellipse with the chord C of the guide vane 10 respectively, that is individually considered, less than 45 ° and together, that is, in sum, always less than 80 °.
an entry radius of the guide vane 10 is designated, wherein f r, 4 is an exit radius of the vane 10 is designated.
the entry radius f r, 3 is also illustrated by r 3 in the figure, wherein the exit radius f r, 4 is also illustrated by r 4 .
a radius r 2 can be seen .
the guide vane 10 has an entry angle ⁇ b, 3 and an exit angle ⁇ b, 4 , wherein the guide vane 10, in particular its inlet area, in which the vane 10 is flown by air, the entry angle ⁇ b, 3 encloses with the radial , Further, the guide vane 10, in particular its outlet region, over which the guide vane 10 is flowed away from the air, the exit angle ⁇ b, 4 with the radial includes, said radials in the Fig. Each with r is illustrated.
the guide vane 10 has a maximum thickness d b and a so-called thickness reserve f b .
the length of the chord C is also denoted by l b .
the center M of the ellipse with respect to the chord axis of the vane 10 is not more than half the length l b of the chord C from the center S of the chord C.
an at least substantially uniform deceleration without excessive constriction on the vane leading edge can be realized in a flow channel which is at least partially traversed by the vane 10 and can be traversed by the air Measurements of free geometry parameters can be displayed.
a tracking grating design with an elliptical characteristic for the diffuser, which is preferably designed as a radial diffuser, as a result of which particularly advantageous flow conditions in the diffuser can be represented.

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Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Structures Of Non-Positive Displacement Pumps (AREA)
Supercharger (AREA)

EP16721363.6A 2015-05-20 2016-05-10 Leitschaufel für einen diffusor eines radialverdichters Active EP3298285B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE102015006458.4A DE102015006458A1 (de)	2015-05-20	2015-05-20	Leitschaufel für einen Diffusor eines Radialverdichters
PCT/EP2016/000762 WO2016184548A1 (de)	2015-05-20	2016-05-10	Leitschaufel für einen diffusor eines radialverdichters

Publications (2)

Publication Number	Publication Date
EP3298285A1 EP3298285A1 (de)	2018-03-28
EP3298285B1 true EP3298285B1 (de)	2019-04-03

Family

ID=54481517

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP16721363.6A Active EP3298285B1 (de)	2015-05-20	2016-05-10	Leitschaufel für einen diffusor eines radialverdichters

Country Status (6)

Country	Link
US (1)	US10619647B2 (zh)
EP (1)	EP3298285B1 (zh)
JP (1)	JP6716609B2 (zh)
CN (1)	CN107624150B (zh)
DE (1)	DE102015006458A1 (zh)
WO (1)	WO2016184548A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102017118950A1 (de) *	2017-08-18	2019-02-21	Abb Turbo Systems Ag	Diffusor für einen Radialverdichter
EP3705695B1 (en) *	2017-12-07	2023-07-19	Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.	Diffuser and turbocharger

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US1792015A (en) *	1930-01-23	1931-02-10	Gerard P Herrick	Aerofoil
US2592471A (en) *	1946-08-22	1952-04-08	James G Sawyer	Axial flow fan
US4243357A (en) *	1979-08-06	1981-01-06	Cummins Engine Company, Inc.	Turbomachine
DE3441115C1 (de) *	1984-11-10	1986-01-30	Daimler-Benz Ag, 7000 Stuttgart	Laufrad fuer eine Gasturbine
US5152661A (en) *	1988-05-27	1992-10-06	Sheets Herman E	Method and apparatus for producing fluid pressure and controlling boundary layer
US6589013B2 (en) *	2001-02-23	2003-07-08	Macro-Micro Devices, Inc.	Fluid flow controller
JP2008520881A (ja)	2004-11-16	2008-06-19	ハネウェル・インターナショナル・インコーポレーテッド	可変ノズルターボ過給機
US8016557B2 (en) *	2005-08-09	2011-09-13	Praxair Technology, Inc.	Airfoil diffuser for a centrifugal compressor
DE202006020187U1 (de) *	2006-06-29	2007-11-29	Deutsches Zentrum für Luft- und Raumfahrt e.V.	Radialverdichter
JP2009197614A (ja)	2008-02-19	2009-09-03	Ihi Corp	遠心圧縮機及びディフューザベーン
EP2623795B1 (en) *	2009-07-19	2018-07-04	Ingersoll-Rand Company	Centrifugal compressor diffuser
US8511981B2 (en)	2010-07-19	2013-08-20	Cameron International Corporation	Diffuser having detachable vanes with positive lock
WO2012019650A1 (en) *	2010-08-12	2012-02-16	Nuovo Pignone S.P.A.	Radial diffuser vane for centrifugal compressors
JP5192060B2 (ja)	2011-04-12	2013-05-08	株式会社豊田中央研究所	コンプレッサ
ITCO20120055A1 (it)	2012-11-06	2014-05-07	Nuovo Pignone Srl	Pala di canale di ritorno per compressori centrifughi

2015
- 2015-05-20 DE DE102015006458.4A patent/DE102015006458A1/de not_active Withdrawn
2016
- 2016-05-10 CN CN201680028688.1A patent/CN107624150B/zh active Active
- 2016-05-10 US US15/575,135 patent/US10619647B2/en active Active
- 2016-05-10 WO PCT/EP2016/000762 patent/WO2016184548A1/de active Application Filing
- 2016-05-10 JP JP2017559831A patent/JP6716609B2/ja active Active
- 2016-05-10 EP EP16721363.6A patent/EP3298285B1/de active Active

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number	Publication date
US20180142701A1 (en)	2018-05-24
DE102015006458A1 (de)	2015-12-03
WO2016184548A1 (de)	2016-11-24
JP6716609B2 (ja)	2020-07-08
US10619647B2 (en)	2020-04-14
JP2018514699A (ja)	2018-06-07
CN107624150A (zh)	2018-01-23
CN107624150B (zh)	2022-06-17
EP3298285A1 (de)	2018-03-28

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