EP0999349B1 - Axialturbine - Google Patents
Axialturbine Download PDFInfo
- Publication number
- EP0999349B1 EP0999349B1 EP99810971A EP99810971A EP0999349B1 EP 0999349 B1 EP0999349 B1 EP 0999349B1 EP 99810971 A EP99810971 A EP 99810971A EP 99810971 A EP99810971 A EP 99810971A EP 0999349 B1 EP0999349 B1 EP 0999349B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- blades
- outer ring
- blade
- ring
- 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.)
- Expired - Lifetime
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 29
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/145—Means for influencing boundary layers or secondary circulations
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/20—Specially-shaped blade tips to seal space between tips and stator
Definitions
- the invention relates to an axial turbine according to the preamble of claim 1.
- Essential components of the axial turbines of turbomachines are the Rotor with the blades, the nozzle ring and the cover for the blades. Due to unavoidable manufacturing and assembly tolerances arise in the flow channel such axial turbines small discontinuities, which is a reduction the efficiency result.
- the mostly cast nozzle ring which is arranged between the stationary housing parts and the rotating blades of an axial turbine.
- EP 806 548 A1 a solution for simple and secure attachment of the nozzle ring is known.
- the nozzle ring lies with its outer ring on the cover and with its inner ring on the gas inlet housing.
- an axial and between the outer ring and the gas outlet housing a radial expansion gap is formed.
- the blades are arranged in a stepped manner to the guide vanes combined in the nozzle ring and have a positive overlap, ie in the region of the rotor blades, the inner contour of the cover is arranged radially further outside than in the area of the guide vanes, similar to what is disclosed in US Pat. Nos. 2,849,209 and 4,006,345.
- a configuration has the disadvantage during disassembly that the axial turbine can only be moved in the opposite direction to the nozzle ring and not in both directions.
- the invention seeks to avoid all these disadvantages. It is the object of the invention to provide an axial turbine with improved efficiency. In addition, the assembly and disassembly options are to be expanded. According to the invention, this is achieved in that, in a device according to the preamble of claim 1, the parting line from the outer ring of the nozzle ring to the cover blade side of an extending through half the gap width of the axial gap, imaginary plane, located immediately upstream of the blades.
- the outer ring of the nozzle ring is extended in the direction of the blades, so that the flow channel over almost the entire gap width of the axial gap has no discontinuity.
- an improvement of the flow conditions and the efficiency of the axial turbine can be achieved.
- the inner contour of the cover is arranged radially outside the inner contour of the outer ring. In this case, a step is created with a so-called positive blade overlap, which reduces overflow of the blades in the upstream region and in combination with the significantly reduced discontinuity can lead to a disproportionate increase in efficiency.
- each blade which is equipped with a pressure side, a suction side and with a blade tip
- a bracket projecting beyond the blade profile at least on the pressure side is arranged on the blade tip.
- a similar construction has the sheet in GB 1491556, and further, however, for fixing, the sheet in US 3532437. Due to the forming in the region of the console vortex, the efficiency-detrimental overflow of the blade tip can be significantly reduced.
- FIG. 1 The illustrated in Fig. 1 as the prior art axial turbine of an exhaust gas turbocharger has one of a gas inlet and a gas outlet housing 1, 2 formed Turbine housing 3, which by means of fasteners designed as screws 4 is held together.
- Turbine housing 3 In the turbine housing 3 is one of a Shaft 5 supported rotor 6 with blades 7 arranged.
- the rotor 6 is bounded on the outside by a diffuser designed as a cover 8, which in turn via a flange 9 and by means of screws 10 on the gas outlet housing 2 is attached.
- a flow channel 11 formed, which the exhaust gases of a, not shown, with the diesel engine connected to the exhaust gas turbocharger receives and to the blades 7 of the rotor 6 forwards.
- another internal combustion engine be connected to the exhaust gas turbocharger.
- a casting nozzle ring 15 Upstream of the blades 7 is in the flow channel 11 a from an outer ring 12, an inner ring 13 and a number of guide vanes formed therebetween 14 existing and designed as a casting nozzle ring 15 is arranged.
- the latter is clamped axially between the cover 8 and the gas inlet housing 1 and arranged radially inside the gas outlet housing 2. It lies to that the nozzle ring 15 with its outer ring 12 on the cover 8 and with his Inner ring 13 on the gas inlet housing 1 at.
- the inner ring 13 is by means of several formed as pins Positionierlementen 16 against rotation on the gas inlet housing 1 supported.
- a parting line 17 is formed (Fig. 1).
- the nozzle ring 15 also from other materials, such as sheet metal or steel profiles be made or made of ceramic.
- FIG. 2 shows an enlarged detail of FIG. 1, which shows a first Embodiment of the invention shows.
- an axial gap 18 with a gap width 19.
- the parting line 17 of the outer ring 12 of the nozzle ring 15 and the cover 8 is the bucket side one through half the gap width 19 of the axial gap 18 extending imaginary plane 20 arranged. Shown is a advantageous arrangement, arranged with a directly upstream of the blades 7 Parting line 17.
- the nozzle ring 15 has the task of the exhaust gases optimally to the To guide blades 7 of the rotor 6.
- the thus driven rotor 6 provides in turn for driving the associated with him, not shown compressor.
- the compressed air in the compressor becomes charged, i. to increase performance used the diesel engine.
- both the cover 8 of the blades 7 and the outer ring 12 of the nozzle ring 15 an inner contour 21, 22, wherein the inner contour 21 of the cover 8 radially outside the inner contour 22 of the outer ring 12 is arranged (Fig. 3).
- the Axial turbine despite the use of such an advantageous blade cover, be removed on both sides after removing the nozzle ring 15, which so far was not possible.
- a blade profile 23 of the blade 7 is shown in Fig. 3, which a pressure side 24, a suction side 25 and a blade tip 26 has.
- a blade profile 23 both pressure and suction side superior console 27 and the console 27 in the direction of the cover. 8 superior ridge 28 arranged (Fig. 4).
- the bridge reduces 28 possible Gap losses formed in between the blades 7 and the cover 8 Radial gap 29.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Description
Es hat sich jedoch gezeigt, dass insbesondere auch bei Unstetigkeiten im Übergangsbereich vom Aussenring des Düsenrings zur Abdeckung, welche neben den bereits oben beschriebenen Fertigungs- und Montagetoleranzen auch Wärmedehnungen als Ursache haben, mit einer entsprechenden Verschlechterung des Wirkungsgrades zu rechnen ist.
Aus Dejc & Trojanovskij "Untersuchung und Berechnung axialer Turbinenstufen", VEB Verlag Technik, Berlin, 1973, S. 452 (Bild 7.32, II) ist zudem eine Vorrichtung zur Reduktion der durch das Radialspiel der Turbinenschaufeln hervorgerufenen Spaltverluste bekannt. Dazu werden die Laufschaufeln gestuft zu den im Düsenring zusammengefassten Leitschaufeln angeordnet und weisen eine positive Überdeckung auf, d.h. im Bereich der Laufschaufeln ist die Innenkontur der Abdeckung radial weiter ausserhalb als im Bereich der Leitschaufelnder angeordnet ähnlich wie auch in US 2849209 und US 4063845 offenbart. Eine solche Konfiguration hat jedoch bei der Demontage den Nachteil, dass die Axialturbine lediglich entgegengesetzt zum Düsenring und nicht in beide Richtungen verschoben werden kann.
Erfindungsgemäss wird dies dadurch erreicht, dass bei einer Vorrichtung gemäss dem Oberbegriff des Anspruchs 1, die Trennfuge vom Aussenring des Düsenringes zur Abdeckung laufschaufelseitig einer durch die halbe Spaltweite des Axialspaltes verlaufenden, gedachten Ebene, unmittelbar stromauf der Laufschaufeln angeordnet ist.
Es ist besonders zweckmässig, wenn zudem die Innenkontur der Abdeckung radial ausserhalb der Innenkontur des Aussenringes angeordnet ist. In diesem Fall entsteht eine Stufe mit einer sogenannten positiven Schaufelüberdeckung, welche ein Überströmen der Laufschaufeln in deren stromaufwärtigen Bereich verringert und in Kombination mit der deutlich reduzierten Unstetigkeit zu einer überproportionalen Steigerung des Wirkungsgrades führen kann.
Infolge der Anordnung der Trennfuge von Aussenring und Abdeckung unmittelbar stromauf der Laufschaufeln ist im Bereich der Leitschaufeln keine Überdeckung der Laufschaufeln durch die Abdeckung nach radial innen erforderlich. Diese Überdeckung und damit die Erzeugung der erforderlichen Stufe wird nunmehr vom Aussenring des Düsenringes übernommen, welcher seinerseits die Innenkontur der Abdeckung der Laufschaufeln nach radial innen überragt. Trotz Verwendung einer solchen vorteilhaften Schaufelüberdeckung kann die Axialturbine daher nach Entfernen des Düsenringes beidseitig demontiert werden, was bisher nicht möglich war.
Ferner ist es vorteilhaft, wenn das mit einer Druckseite, einer Saugseite und mit einer Schaufelspitze ausgestattete Schaufelprofil jeder Laufschaufel derart ausgebildet ist, dass an der Schaufelspitze eine das Schaufelprofil zumindest druckseitig überragende Konsole angeordnet ist. Eine ähnliche konstruktion weist das Blatt in GB 1491556 auf, und weiterhin, allerdings zur fixierung, das Blatt in US 3532437. Durch die sich im Bereich der Konsole ausbildenden Wirbel kann das dem Wirkungsgrad abträgliche Überströmen der Schaufelspitze deutlich verringert werden.
- Fig. 1
- einen Teillängsschnitt einer Axialturbine des Standes der Technik;
- Fig. 2
- einen vergrösserten Ausschnitt aus Fig. 1, mit der erfindungsgemässen Ausbildung des Düsenringes;
- Fig. 3
- eine Darstellung gemäss Fig. 2, jedoch in einem zweiten Ausführungsbeispiel;
- Fig. 4
- einen Schnitt durch eine Laufschaufel entlang der Linie IV-IV in Fig. 3.
- 1
- Gaseintrittgehäuse
- 2
- Gasaustrittgehäuse
- 3
- Turbinengehäuse
- 4
- Verbindungselement, Schraube
- 5
- Welle
- 6
- Rotor
- 7
- Laufschaufel
- 8
- Abdeckung, Diffusor
- 9
- Flansch
- 10
- Schraube
- 11
- Strömungskanal
- 12
- Aussenring
- 13
- Innenring
- 14
- Leitschaufel
- 15
- Düsenring
- 16
- Positionierlement, Stift
- 17
- Trennfuge
- 18
- Axialspalt
- 19
- Spaltweite
- 20
- Ebene, in halber Spaltweite
- 21
- Innenkontur, von 8
- 22
- Innenkontur, von 12
- 23
- Schaufelprofil
- 24
- Druckseite
- 25
- Saugseite
- 26
- Schaufelspitze
- 27
- Konsole
- 28
- Steg
- 29
- Radialspalt
Claims (1)
- Axialturbine mit einem eine Anzahl Laufschaufeln (7) tragenden Rotor (6), mit einem stromauf der Laufschaufeln (7) angeordneten, aus einem Aussenring (12), einem Innenring (13) und aus einer Anzahl dazwischen angeordneter Leitschaufeln (14) bestehenden Düsenring (15), mit einem zwischen den Laufschaufeln (7) und den Leitschaufeln (14) ausgebildeten, eine Spaltweite (19) aufweisenden Axialspalt (18) und mit einer die Laufschaufeln (7) nach aussen begrenzenden Abdeckung (8), wobei zwischen dem Aussenring (12) des Düsenrings (15) und der Abdeckung (8) eine Trennfuge (17) ausgebildet ist, wobei die Trennfuge (17) von Aussenring (12) und Abdeckung (8) laufschaufelseitig einer durch die halbe Spaltweite (19) des Axialspaltes (18) verlaufenden, gedachten Ebene (20) angeordnet ist, und die Trennfuge (17) von Aussenring (12) und Abdeckung (8) unmittelbar stromauf der Laufschaufeln (7) angeordnet ist,
und sowohl die Abdeckung (8) als auch der Aussenring (12) eine Innenkontur (21, 22) aufweisen, wobei die Innenkontur (21) der Abdeckung (8) radial ausserhalb der Innenkontur (22) des Aussenringes (12) angeordnet ist, so dass unmittelbar stromauf der Laufschaufein (7) eine Stufe mit positiver Schaufelüberdeckung besteht,
dadurch gekennzeichnet, dass jede Laufschaufel (7) ein Schaufelprofil (23) mit einer Druckseite (24), einer Saugseite (25) und mit einer Schaufelspitze (26) aufweist, wobei an der Schaufelspitze (26) eine das Schaufelprofil (23) zumindest druckseitig überragende Konsole (27) angeordnet ist, und
an der Schaufelspitze (26) ein die Konsole (27) in Richtung der Abdeckung (8) überragender Steg (28) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19850732 | 1998-11-04 | ||
DE19850732A DE19850732A1 (de) | 1998-11-04 | 1998-11-04 | Axialturbine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0999349A2 EP0999349A2 (de) | 2000-05-10 |
EP0999349A3 EP0999349A3 (de) | 2002-03-13 |
EP0999349B1 true EP0999349B1 (de) | 2005-05-11 |
Family
ID=7886598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99810971A Expired - Lifetime EP0999349B1 (de) | 1998-11-04 | 1999-10-27 | Axialturbine |
Country Status (7)
Country | Link |
---|---|
US (1) | US6318961B1 (de) |
EP (1) | EP0999349B1 (de) |
JP (1) | JP2000145407A (de) |
KR (1) | KR100656721B1 (de) |
CN (2) | CN1144935C (de) |
DE (2) | DE19850732A1 (de) |
TW (1) | TW460656B (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19913269A1 (de) * | 1999-03-24 | 2000-09-28 | Asea Brown Boveri | Turbinenschaufel |
US7270519B2 (en) | 2002-11-12 | 2007-09-18 | General Electric Company | Methods and apparatus for reducing flow across compressor airfoil tips |
US6779979B1 (en) * | 2003-04-23 | 2004-08-24 | General Electric Company | Methods and apparatus for structurally supporting airfoil tips |
US7547187B2 (en) | 2005-03-31 | 2009-06-16 | Hitachi, Ltd. | Axial turbine |
US7596949B2 (en) * | 2006-02-23 | 2009-10-06 | General Electric Company | Method and apparatus for heat shielding gas turbine engines |
EP2396519B1 (de) * | 2009-01-20 | 2017-07-12 | Williams International Co., L.L.C. | Turbolader-rumpfgruppe mit kartusche |
DE102009045167A1 (de) * | 2009-09-30 | 2011-04-07 | Man Diesel & Turbo Se | Turbine eines Abgasturbolader |
US8926270B2 (en) * | 2010-12-17 | 2015-01-06 | General Electric Company | Low-ductility turbine shroud flowpath and mounting arrangement therefor |
DE102011080596A1 (de) * | 2011-08-08 | 2013-02-14 | Abb Turbo Systems Ag | Anordnung für ein Leiten eines Abgases in einer axial angeströmten Abgasturbine |
JP5934806B2 (ja) * | 2011-12-20 | 2016-06-15 | ゲーコーエヌ エアロスペース スウェーデン アーベー | ガスタービンエンジン構成部品の製造方法 |
US10087764B2 (en) | 2012-03-08 | 2018-10-02 | Pratt & Whitney Canada Corp. | Airfoil for gas turbine engine |
EP2781695A1 (de) * | 2013-03-22 | 2014-09-24 | ABB Turbo Systems AG | Leitvorrichtung einer Abgasturbine |
CN108590778B (zh) * | 2018-01-15 | 2020-09-04 | 重庆江增船舶重工有限公司 | 一种轴流式有机工质透平膨胀机 |
DE102018212334B4 (de) * | 2018-07-24 | 2024-04-11 | Vitesco Technologies GmbH | Abgasturbolader mit Turbinenrad mit Winglets |
CN115585055A (zh) * | 2022-11-04 | 2023-01-10 | 重庆金皇后新能源汽车制造有限公司 | 一种加力大环转换器、传动系统及汽车 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4063845A (en) * | 1975-06-04 | 1977-12-20 | General Motors Corporation | Turbomachine stator interstage seal |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2849209A (en) * | 1950-10-11 | 1958-08-26 | Gen Electric | Nozzle construction for turbines |
US3067983A (en) * | 1958-07-01 | 1962-12-11 | Gen Motors Corp | Turbine mounting construction |
US2980396A (en) * | 1959-06-29 | 1961-04-18 | Gen Electric | Stator construction for turbine engines |
CH482915A (de) * | 1967-11-03 | 1969-12-15 | Sulzer Ag | Leitvorrichtung für Axialturbine |
US3817655A (en) * | 1972-11-22 | 1974-06-18 | Carrier Corp | Stator blade mounting structure for turbomachines |
US3867060A (en) * | 1973-09-27 | 1975-02-18 | Gen Electric | Shroud assembly |
DE2405050A1 (de) * | 1974-02-02 | 1975-08-07 | Motoren Turbinen Union | Laufschaufeln fuer turbomaschinen |
US3985465A (en) * | 1975-06-25 | 1976-10-12 | United Technologies Corporation | Turbomachine with removable stator vane |
JPS5436161Y2 (de) * | 1975-08-01 | 1979-11-01 | ||
GB2061396B (en) * | 1979-10-24 | 1983-05-18 | Rolls Royce | Turbine blade tip clearance control |
US4684320A (en) * | 1984-12-13 | 1987-08-04 | United Technologies Corporation | Axial flow compressor case |
SU1480776A3 (ru) * | 1985-02-20 | 1989-05-15 | Ббц Аг Браун, Бовери Унд Ко. (Фирма) | Турбонагнетатель двигател внутреннего сгорани |
US5618161A (en) * | 1995-10-17 | 1997-04-08 | Westinghouse Electric Corporation | Apparatus for restraining motion of a turbo-machine stationary vane |
DE19618313B4 (de) | 1996-05-08 | 2005-07-21 | Abb Turbo Systems Ag | Axialturbine eines Abgasturboladers |
DE19618314A1 (de) | 1996-05-08 | 1997-11-13 | Asea Brown Boveri | Abgasturbine eines Abgasturboladers |
US5738490A (en) * | 1996-05-20 | 1998-04-14 | Pratt & Whitney Canada, Inc. | Gas turbine engine shroud seals |
-
1998
- 1998-11-04 DE DE19850732A patent/DE19850732A1/de not_active Withdrawn
-
1999
- 1999-10-27 EP EP99810971A patent/EP0999349B1/de not_active Expired - Lifetime
- 1999-10-27 TW TW088118573A patent/TW460656B/zh not_active IP Right Cessation
- 1999-10-27 DE DE59912034T patent/DE59912034D1/de not_active Expired - Lifetime
- 1999-11-01 US US09/431,177 patent/US6318961B1/en not_active Expired - Lifetime
- 1999-11-02 JP JP11312545A patent/JP2000145407A/ja active Pending
- 1999-11-03 KR KR1019990048332A patent/KR100656721B1/ko active IP Right Grant
- 1999-11-04 CN CNB991235177A patent/CN1144935C/zh not_active Expired - Lifetime
- 1999-11-04 CN CN99252706U patent/CN2403896Y/zh not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4063845A (en) * | 1975-06-04 | 1977-12-20 | General Motors Corporation | Turbomachine stator interstage seal |
Also Published As
Publication number | Publication date |
---|---|
CN1144935C (zh) | 2004-04-07 |
DE59912034D1 (de) | 2005-06-16 |
DE19850732A1 (de) | 2000-05-11 |
CN1253230A (zh) | 2000-05-17 |
US6318961B1 (en) | 2001-11-20 |
TW460656B (en) | 2001-10-21 |
CN2403896Y (zh) | 2000-11-01 |
KR100656721B1 (ko) | 2006-12-15 |
KR20000035199A (ko) | 2000-06-26 |
EP0999349A2 (de) | 2000-05-10 |
EP0999349A3 (de) | 2002-03-13 |
JP2000145407A (ja) | 2000-05-26 |
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