EP0985803A1 - Turbinenstufe mit radialer Zuströmung und axialer Abströmung - Google Patents
Turbinenstufe mit radialer Zuströmung und axialer Abströmung Download PDFInfo
- Publication number
- EP0985803A1 EP0985803A1 EP98810899A EP98810899A EP0985803A1 EP 0985803 A1 EP0985803 A1 EP 0985803A1 EP 98810899 A EP98810899 A EP 98810899A EP 98810899 A EP98810899 A EP 98810899A EP 0985803 A1 EP0985803 A1 EP 0985803A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- axial
- radial
- channel
- main
- 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.)
- Granted
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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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
- F01D1/04—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially axially
-
- 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
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/048—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector for radial admission
Definitions
- the present invention relates to a turbine stage with radial inflow and axial outflow, in which a main flow in one Guide blading is directed radially towards a machine axis and one Barrel blading is flowed through in the main axial flow direction a housing-side duct wall and a hub-side duct wall one Include flow channel, which flow channel from a radial extending part, a part extending in the main axial direction, and one There is radial-axial flow deflection, which radial-axial flow deflection a main radial flow into an axial one Redirects main flow.
- the first stage of a steam turbine group is often of the radial-axial type executed, in which the guide blading in radial and the Blades are blown through in the main axial direction.
- the main advantage of this arrangement is that it is simple
- the staggering of the guide vanes has to be adapted Power and volume flow class can take place.
- the radial flow In this case, guide vanes can be attached to the housing on both sides, so that no seal against the rotating shaft is installed here got to.
- the necessary radial-axial flow deflection a very inhomogeneous and lossy flow of the impeller are accepted. Because of the flow diversion a radial pressure gradient is induced in the flow channel in such a way that the pressure from the housing to the hub increases.
- the object of the present invention is in a turbine stage with radial Inflow and axial outflow, in which a main flow in one Guide blading is directed radially towards a machine axis and one Barrel blading is flowed through in the main axial flow direction a housing-side duct wall and a hub-side duct wall one Include flow channel, which flow channel from a radial extending part, a part extending in the main axial direction, and one There is radial-axial flow deflection, which radial-axial flow deflection a main radial flow into an axial one Redirects main flow, the most homogeneous flow possible To create playpens.
- the Exit gap of the seal should be designed so that the leakage is as possible parallel to the main flow along the hub, creating potential harmful interactions with the main flow are further reduced become.
- the single figure shows an example of the embodiment according to the invention a radial-axial turbine stage.
- the outer radius of the flow deflection is indeed through the housing formed, due to the function, the designation "hub-side Flow diversion "used.
- the housing-side wall 27 of the overflow channel 50 receives the housing-side wall 27 of the overflow channel 50 for this purpose, immediately downstream of the deflection, a kink A, downstream which it is guided divergent by the machine axis 10. From the Counter-kink B, the housing-side wall 27 again runs parallel to Machine axis 10, or towards this. Likewise, the hub-side wall 28 downstream of a kink AA away from the machine axis 10 and from Counter kink point BB again parallel.
- the location of the hub-side kinks AA and BB advantageously becomes one Distance downstream of the corresponding bends A and B on the housing side chosen.
- the pronounced maximum speed, which is on the hub side Deflection 26 forms, dismantled; furthermore, the seal exit gap 30 additionally supplied mass flow of the main flow under largely avoid harmful interactions.
- the flow upstream of the Impeller La accelerated in the axial direction which if necessary Areas of excessive impeller incorrect flow occur in particular of the hub-side channel wall 28 can be significantly reduced.
- the location of the seal exit gap 30 is advantageously at one point selected the highest possible pressure in the flow channel, and such that by the centrifugal force of the main flow the penetration depth of the Leakage flow in the flow channel is limited. The latter can continue to be supported by the fact that the exit gap 30 at the end of the Radial-axial deflection is placed, and the outlet gap 30 through its Design the leakage flow as laminar as possible and parallel to the hub side Channel wall 28 leads.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
- 10
- Maschinenachse
- 20
- Gehäuse
- 21
- Nabe
- 25
- gehäuseseitige Strömungsbegrenzung der radial-axial-Umlenkung
- 26
- nabenseitige Strömungsbegrenzung der radial-axial-Umlenkung
- 27
- gehäuseseitige Kanalwand
- 28
- nabenseitige Kanalwand
- 30
- Leckagespalt einer berührungslosen Dichtung
- 40
- radiale Einlaufstrecke
- 41
- Einlaufspirale
- 50
- Überströmkanal vom Leitrad zum Laufrad
- 51
- Hauptstromlinie
- A
- gehäuseseitige Knickstelle
- B
- gehäuseseitige Gegenknickstelle
- AA
- nabenseitige Knickstelle
- BB
- nabenseitige Gegenknickstelle
- Le
- Leitgitter
- La
- Laufgitter
Claims (8)
- Turbinenstufe mit radialer Zuströmung und axialer Abströmung, bei der eine Hauptströmung in einer Leitbeschaufelung (Le) radial zu einer Maschinenachse (10) hin gerichtet ist und eine Laufbeschaufelung (La) in axialer Hauptströmungsrichtung durchströmt wird, wobei eine gehäuseseitige Kanalwand (27) und eine nabenseitige Kanalwand (28) einen Strömungskanal (50) einschliessen, welcher Strömungskanal aus einem radial verlaufenden Teil, einem in axialer Hauptrichtung verlaufenden Teil, und einer Radial-Axial-Strömungsumlenkung besteht, welche Radial-Axial-Strömungsumlenkung eine radiale Hauptströmung in eine axiale Hauptströmung umlenkt , dadurch gekennzeichnet, dass stromab der Radial-Axial-Strömungsumlenkung der in axialer Hauptrichtung gerichtete Teil des Strömungskanals (50) in einem ersten Teil von der Maschinenachse (10) weg weist, und unmittelbar vor der Laufbeschaufelung (La) in rein axiale Richtung geführt ist.
- Turbinenstufe nach Anspruch 1, dadurch gekennzeichnet, dass der Strömungskanal (50) unmittelbar stromauf der Laufbeschaufelung (La) eine Abnahme des durchströmten Querschnitts aufweist.
- Turbinenstufe nach einem der Ansprüche 1 oder 2,dadurch gekennzeichnet, dass der Strömungskanal (50) unmittelbar stromab der Radial-Axial-Strömungsumlenkung eine Querschnittserweiterung aufweist.
- Turbinenstufe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die gehäuseseitige Kanalwand (27) zwischen der Radial-Axial-Strömungsumlenkung und dem Laufrad-Eintritt mindestens eine Knickstelle (A) aufweist, stromab derer die gehäuseseitige Kanalwand (27) in Hauptströmungsrichtung (51) von der Maschinenachse (10) weg weist, und, dass stromab der Knickstelle (A) mindestens eine Gegenknickstelle (B) angeordnet ist.
- Turbinenstufe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die nabenseitige Kanalwand (28) zwischen der Radial-Axial-Strömungsumlenkung und dem Laufrad-Eintritt mindestens eine Knickstelle (AA) aufweist, stromab derer die nabenseitige Kanalwand (28) in Hauptströmungsrichtung (51) von der Maschinenachse (10) weg weist, und, dass stromab der Knickstelle (AA) mindestens eine Gegenknickstelle (BB) angeordnet ist.
- Turbinenstufe nach Anspruch 5, dadurch gekennzeichnet, dass die nabenseitigen Knickstellen (AA, BB) stromab der korrespondierenden gehäusesitigen Knickstellen (A, B)angeordnet sind.
- Turbinenstufe nach einem der Ansprüche 1 bis 6, bei der ein Leckagestrom einer berührungslosen Dichtung in die Hauptströmung einströmt, dadurch gekennzeichnet, dass ein Austrittsspalt der berührungslosen Dichtung so angeordnet wird, dass der Leckagestrom an einer Stelle höchsten Druckes im Strömungskanal eingebracht ist.
- Turbinenstufe nach einem der Ansprüche 1 bis 7, bei der ein Leckagestrom einer berührungslosen Dichtung in die Hauptströmung einströmt, dadurch gekennzeichnet, dass eine Leckageströmung parallel zur Hauptströmung geführt ist.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19980810899 EP0985803B1 (de) | 1998-09-10 | 1998-09-10 | Turbinenstufe mit radialer Zuströmung und axialer Abströmung |
DE59807746T DE59807746D1 (de) | 1998-09-10 | 1998-09-10 | Turbinenstufe mit radialer Zuströmung und axialer Abströmung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19980810899 EP0985803B1 (de) | 1998-09-10 | 1998-09-10 | Turbinenstufe mit radialer Zuströmung und axialer Abströmung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0985803A1 true EP0985803A1 (de) | 2000-03-15 |
EP0985803B1 EP0985803B1 (de) | 2003-04-02 |
Family
ID=8236307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980810899 Expired - Lifetime EP0985803B1 (de) | 1998-09-10 | 1998-09-10 | Turbinenstufe mit radialer Zuströmung und axialer Abströmung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0985803B1 (de) |
DE (1) | DE59807746D1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1496196A1 (de) * | 2003-07-08 | 2005-01-12 | Siemens Aktiengesellschaft | Dampfturbine |
GB2440344A (en) * | 2006-07-26 | 2008-01-30 | Christopher Freeman | Impulse turbine design |
CN101094971B (zh) * | 2004-11-02 | 2011-03-09 | 阿尔斯托姆科技有限公司 | 涡轮机装置的优化的涡轮机级以及设计方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2429936A (en) * | 1943-12-18 | 1947-10-28 | Allis Chalmers Mfg Co | Turbine mounting |
DE1076145B (de) * | 1953-08-25 | 1960-02-25 | Siemens Ag | Hochdruckturbine mit Radialbeschaufelung der Gleichdruckregelstufe |
GB1162440A (en) * | 1967-06-05 | 1969-08-27 | Shell Int Research | Gas Turbine. |
DE2231015A1 (de) * | 1972-05-31 | 1973-12-20 | Bbc Brown Boveri & Cie | Erste stufe einer zweiflutigen niederdruck-dampfturbine grosser leistung |
EP0024275A1 (de) * | 1979-08-15 | 1981-03-04 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Arretierung von Düsenringen |
DE4014976C1 (en) * | 1990-05-10 | 1991-07-25 | Mtu Friedrichshafen Gmbh | Exhaust turbocharger with two-stage axial exhaust turbine - has duct section, adjacent to first turbine stage, as part of axially displaceable ring slider |
-
1998
- 1998-09-10 EP EP19980810899 patent/EP0985803B1/de not_active Expired - Lifetime
- 1998-09-10 DE DE59807746T patent/DE59807746D1/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2429936A (en) * | 1943-12-18 | 1947-10-28 | Allis Chalmers Mfg Co | Turbine mounting |
DE1076145B (de) * | 1953-08-25 | 1960-02-25 | Siemens Ag | Hochdruckturbine mit Radialbeschaufelung der Gleichdruckregelstufe |
GB1162440A (en) * | 1967-06-05 | 1969-08-27 | Shell Int Research | Gas Turbine. |
DE2231015A1 (de) * | 1972-05-31 | 1973-12-20 | Bbc Brown Boveri & Cie | Erste stufe einer zweiflutigen niederdruck-dampfturbine grosser leistung |
EP0024275A1 (de) * | 1979-08-15 | 1981-03-04 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Arretierung von Düsenringen |
DE4014976C1 (en) * | 1990-05-10 | 1991-07-25 | Mtu Friedrichshafen Gmbh | Exhaust turbocharger with two-stage axial exhaust turbine - has duct section, adjacent to first turbine stage, as part of axially displaceable ring slider |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1496196A1 (de) * | 2003-07-08 | 2005-01-12 | Siemens Aktiengesellschaft | Dampfturbine |
WO2005005783A1 (de) * | 2003-07-08 | 2005-01-20 | Siemens Aktiengesellschaft | Dampfturbine |
CN101094971B (zh) * | 2004-11-02 | 2011-03-09 | 阿尔斯托姆科技有限公司 | 涡轮机装置的优化的涡轮机级以及设计方法 |
GB2440344A (en) * | 2006-07-26 | 2008-01-30 | Christopher Freeman | Impulse turbine design |
Also Published As
Publication number | Publication date |
---|---|
DE59807746D1 (de) | 2003-05-08 |
EP0985803B1 (de) | 2003-04-02 |
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