EP1473438A2 - Steam turbine with a single stage high pressure module - Google Patents

Steam turbine with a single stage high pressure module Download PDF

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Publication number
EP1473438A2
EP1473438A2 EP04290986A EP04290986A EP1473438A2 EP 1473438 A2 EP1473438 A2 EP 1473438A2 EP 04290986 A EP04290986 A EP 04290986A EP 04290986 A EP04290986 A EP 04290986A EP 1473438 A2 EP1473438 A2 EP 1473438A2
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EP
European Patent Office
Prior art keywords
high pressure
pressure module
steam turbine
module
shaft
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.)
Withdrawn
Application number
EP04290986A
Other languages
German (de)
French (fr)
Other versions
EP1473438A3 (en
Inventor
Alain Hassan
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.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
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Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP1473438A2 publication Critical patent/EP1473438A2/en
Publication of EP1473438A3 publication Critical patent/EP1473438A3/en
Withdrawn legal-status Critical Current

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    • 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
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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
    • F05D2250/30—Arrangement of components
    • F05D2250/32—Arrangement of components according to their shape
    • F05D2250/323—Arrangement of components according to their shape convergent
    • 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
    • F05D2250/30—Arrangement of components
    • F05D2250/32—Arrangement of components according to their shape
    • F05D2250/324—Arrangement of components according to their shape divergent

Definitions

  • the present invention relates to steam turbines and more particularly turbines comprising a high body or module pressure and a low pressure body or module.
  • the high pressure module has a rotor of five to ten stages approximately with as many rows of fixed fins and movable fins.
  • This type of high pressure module is complex to produce and go up, so its price is important.
  • the object of the invention is to provide a high pressure module with both simple to make and to assemble while having a low cost.
  • the steam turbine according to the invention comprises a high module pressure with a single stage of fins, a low module pressure, a speed reducer and an alternator, it is characterized in that the high pressure module has a nozzle piece.
  • This single-stage high pressure module provides the same function as the multi-stage high pressure module with a fin design different from that of multi-stage turbines and its realization is easier and less expensive.
  • the pressure ratio between the input and the output can be for example from 3 to 20.
  • each module includes a rotor and that the rotor of the high pressure module and that of the low module pressure are driven by the speed reducer.
  • the fixed fins or the nozzles of the high pressure module have a profile with channels convergent then divergent form from the inlet to the outlet.
  • This profile fixed fins also called distributors, is calculated so known from the theory of supersonic flows.
  • the movable fins have a profile such that it limits the detachments and the losses along the canals, this profile is determined by calculations complex in three dimensions and using the equations of aerodynamics.
  • the high pressure module has a nozzle of divergent convergent shape. This form is characteristic of super sonic flows since the equations of aerodynamics applied to supersonic flows show the need to have channels whose section evolves in converging then diverging.
  • the high pressure module comprises a movable wheel secured to a shaft and supporting the blades, the whole being in one piece. That is to say that the fins are machined in the same room as the tree. The realization of a single piece of this together simplifies both its realization and its assembly.
  • the tree is coupled with a speed reducer.
  • the speed reducer has three axes, two high speed axes for each of the high and low pressure modules and a low speed axis for the alternator.
  • the upper module tree pressure is connected to one of the axes of the reducer.
  • the tree is directly connected to the reducer.
  • the coupling between the shaft and the reduction gear is ensured by an intermediate component, here the shaft is directly coupled to the reducer.
  • the high pressure module has a single steam control valve, resulting in simplification of the device.
  • the high pressure module has an independent landing. This independent bearing placed in the turbine module near the gearbox.
  • Turbine 1 of the prior art as seen in the figure 1 includes two modules, a high pressure module 2, a module low pressure 3, a reducing valve 4 and an alternator 5.
  • the steam enters by an intake unit comprising a stop valve 6 and four adjustment valves 7.
  • module 2 is connected to the reducer 4 by a flexible coupling.
  • the turbine 1 according to the invention has the same elements as the state of the art with the exception of the high pressure module 2, the size is greatly reduced (see Figure 2).
  • the spiral shape of the intake volute 22 makes it possible to generate at the entrance of the supersonic distributor a homogeneous flow whatever the azimuth.
  • the supersonic nozzle can be multi-channel. Steam can then enter the module through a multitude of openings.
  • the steam flow is adjusted by a valve setting 8.
  • the steam flow can be stopped by a stop valve 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Control Of Turbines (AREA)

Abstract

The turbine has a high pressure body (2) including a single stage of wings (20) mounted on a shaft (21). The shaft is maintained by a bearing block (210), and is directly coupled to a shaft (40) of a speed-reduction gear (4). The wings have a profile with channels converging then diverging from an input towards an output. A ratio of pressure between the input and output ranges from 3 to 20.

Description

La présente invention concerne les turbines à vapeur et plus particulièrement les turbines comprenant un corps ou module haute pression et un corps ou module basse pression.The present invention relates to steam turbines and more particularly turbines comprising a high body or module pressure and a low pressure body or module.

Le module haute pression comporte un rotor de cinq à dix étages environ avec autant de rangées d'ailettes fixes et d'ailettes mobiles.The high pressure module has a rotor of five to ten stages approximately with as many rows of fixed fins and movable fins.

Ce type de module haute pression est complexe à réaliser et à monter, donc son prix est important.This type of high pressure module is complex to produce and go up, so its price is important.

L'objet de l'invention est de proposer un module haute pression à la fois simple à réaliser et à monter tout en ayant un coût faible.The object of the invention is to provide a high pressure module with both simple to make and to assemble while having a low cost.

La turbine à vapeur selon l'invention, comporte un module haute pression comportant un seul étage d'ailettes, un module basse pression, un réducteur de vitesses et un alternateur, elle est caractérisée en ce que le module haute pression comporte une tuyère monobloc. Ce module haute pression à un seul étage assure la même fonction que le module haute pression multi étages avec une conception d'ailettes différente de celle des turbines multi étagées et sa réalisation est plus aisée et moins coûteuse. Le rapport de pression entre l'entrée et la sortie peut être par exemple de 3 à 20.The steam turbine according to the invention comprises a high module pressure with a single stage of fins, a low module pressure, a speed reducer and an alternator, it is characterized in that the high pressure module has a nozzle piece. This single-stage high pressure module provides the same function as the multi-stage high pressure module with a fin design different from that of multi-stage turbines and its realization is easier and less expensive. The pressure ratio between the input and the output can be for example from 3 to 20.

Selon une autre caractéristique, chaque module comprend un rotor et que le rotor du module haute pression et celui du module basse pression sont entraínés par le réducteur de vitesses.According to another characteristic, each module includes a rotor and that the rotor of the high pressure module and that of the low module pressure are driven by the speed reducer.

Selon une caractéristique particulière, les ailettes fixes ou les tuyères du module haute pression ont un profil comportant des canaux à forme convergente puis divergente de l'entrée vers la sortie. Ce profil des ailettes fixes, aussi appelées distributeurs, est calculé de façon connue à partir de la théorie sur les écoulements supersoniques. Les ailettes mobiles ont un profil tel qu'il limite les décollements et les pertes le long des canaux, ce profil est déterminé par des calculs complexes en trois dimensions et utilisant les équations de l'aérodynamique. According to a particular characteristic, the fixed fins or the nozzles of the high pressure module have a profile with channels convergent then divergent form from the inlet to the outlet. This profile fixed fins, also called distributors, is calculated so known from the theory of supersonic flows. The movable fins have a profile such that it limits the detachments and the losses along the canals, this profile is determined by calculations complex in three dimensions and using the equations of aerodynamics.

Selon une caractéristique particulière, le module haute pression comporte une tuyère de forme convergent divergent. Cette forme est caractéristique des écoulements super soniques puisque les équations de l'aérodynamique appliquées aux écoulements supersoniques montrent la nécessité d'avoir des canaux dont la section évolue en convergeant puis en divergeant.According to a particular characteristic, the high pressure module has a nozzle of divergent convergent shape. This form is characteristic of super sonic flows since the equations of aerodynamics applied to supersonic flows show the need to have channels whose section evolves in converging then diverging.

Selon une autre caractéristique, le module haute pression comporte une roue mobile solidaire d'un arbre et supportant les aubes, l'ensemble étant monobloc. C'est à dire que les ailettes sont usinées dans la même pièce que l'arbre. La réalisation d'une seule pièce de cet ensemble simplifie à la fois sa réalisation et son montage.According to another characteristic, the high pressure module comprises a movable wheel secured to a shaft and supporting the blades, the whole being in one piece. That is to say that the fins are machined in the same room as the tree. The realization of a single piece of this together simplifies both its realization and its assembly.

Selon une caractéristique complémentaire, l'arbre est couplé avec un réducteur de vitesse. Le réducteur de vitesse a trois axes, deux axes grande vitesse pour chacun des module haute et basse pression et un axe basse vitesse pour l'alternateur. L'arbre du module haute pression est relié à un des axes du réducteur.According to an additional characteristic, the tree is coupled with a speed reducer. The speed reducer has three axes, two high speed axes for each of the high and low pressure modules and a low speed axis for the alternator. The upper module tree pressure is connected to one of the axes of the reducer.

Selon une caractéristique particulière, l'arbre est directement relié au réducteur. Habituellement l'accouplement entre l'arbre et le réducteur est assuré par un composant intermédiaire, ici l'arbre est directement couplé au réducteur. On gagne ainsi une pièce, ce qui permet une simplification et une diminution du coût de l'ensemble.According to a particular characteristic, the tree is directly connected to the reducer. Usually the coupling between the shaft and the reduction gear is ensured by an intermediate component, here the shaft is directly coupled to the reducer. We thus win a coin, which allows a simplification and a reduction in the cost of the assembly.

Selon une autre caractéristique, le module haute pression comporte une seule soupape de réglage de vapeur, d'où une simplification du dispositif.According to another characteristic, the high pressure module has a single steam control valve, resulting in simplification of the device.

Selon une autre caractéristique, le module haute pression comporte un palier indépendant. Ce palier indépendant placé dans le module de la turbine à proximité du réducteur.According to another characteristic, the high pressure module has an independent landing. This independent bearing placed in the turbine module near the gearbox.

L'invention sera mieux comprise à la lecture de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels :

  • la figure 1 est une vue générale d'une turbine de l'état de la technique,
  • la figure 2 est une vue générale d'une turbine selon l'invention,
  • la figure 3 est une vue partielle en coupe du module haute pression selon l'invention.
The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the appended drawings in which:
  • FIG. 1 is a general view of a turbine of the state of the art,
  • FIG. 2 is a general view of a turbine according to the invention,
  • Figure 3 is a partial sectional view of the high pressure module according to the invention.

La turbine 1 de l'état de la technique comme on le voit à la figure 1 comprend deux module, un module haute pression 2, un module basse pression 3, un réducteur 4 et un alternateur 5. La vapeur entre par un bloc d'admission comprenant une vanne d'arrêt 6 et quatre soupapes de réglage 7. Dans ce cas, le module 2 est relié au réducteur 4 par un accouplement flexible.Turbine 1 of the prior art as seen in the figure 1 includes two modules, a high pressure module 2, a module low pressure 3, a reducing valve 4 and an alternator 5. The steam enters by an intake unit comprising a stop valve 6 and four adjustment valves 7. In this case, module 2 is connected to the reducer 4 by a flexible coupling.

La turbine 1 selon l'invention comporte les mêmes éléments que l'état de la technique à l'exception du module haute pression 2 dont la taille est fortement réduite (cf. figure 2).The turbine 1 according to the invention has the same elements as the state of the art with the exception of the high pressure module 2, the size is greatly reduced (see Figure 2).

Quand on regarde en détail le module haute pression 2 sur la figure 3, on voit l'étage d'ailettes 20 unique sur l'arbre 21. Cet arbre 21 est maintenu par un palier 210 disposé du coté du réducteur 4 et relié directement à l'arbre 40 du réducteur 4 et en assure l'entraínement par un rotor (non représenté). Le réducteur 4 entraíne également le rotor (non représenté) du module basse pression3.When we look in detail at the high pressure module 2 on the Figure 3, we see the stage of fins 20 single on the shaft 21. This shaft 21 is maintained by a bearing 210 arranged on the side of the reducer 4 and connected directly to the shaft 40 of the reducer 4 and ensures the drive by a rotor (not shown). The reducer 4 also drives the rotor (not shown) of the low pressure module 3.

La vapeur entre dans le module haute pression 2 par une volute d'admission 22 qui dirige la vapeur sur l'ailette 20 et ressort par un diffuseur 23 qui diverge de l'entrée vers la sortie et permet de diminuer la vitesse de sortie de la vapeur.Steam enters the high pressure module 2 through a volute 22 which directs the steam to the fin 20 and exits by a diffuser 23 which diverges from the inlet to the outlet and makes it possible to reduce the steam outlet speed.

La forme en spirale de la volute d'admission 22 permet de générer à l'entrée du distributeur supersonique un écoulement homogène quelque soit l'azimut.The spiral shape of the intake volute 22 makes it possible to generate at the entrance of the supersonic distributor a homogeneous flow whatever the azimuth.

La tuyère supersonique peut être multi-canaux. La vapeur peut alors entrer dans le module par une multitude d'ouvertures. The supersonic nozzle can be multi-channel. Steam can then enter the module through a multitude of openings.

Le réglage du débit de vapeur est effectué par une soupape de réglage 8.The steam flow is adjusted by a valve setting 8.

Le débit de vapeur peut être arrêté par une vanne d'arrêt 9.The steam flow can be stopped by a stop valve 9.

Claims (10)

Turbine à vapeur (1) comportant un module haute pression (2) comportant un seul étage d'ailettes (20), un module basse pression (3), un réducteur de vitesses (4) et un alternateur (5), caractérisée en ce que le module haute pression (2) comporte une tuyère monobloc.Steam turbine (1) comprising a high pressure module (2) comprising a single stage of fins (20), a low pressure module (3), a speed reducer (4) and an alternator (5), characterized in that that the high pressure module (2) comprises a one-piece nozzle. Turbine à vapeur (1) selon la revendication 1, caractérisée en ce que chaque module comprend un rotor et que le rotor du module haute pression (2) et celui du module basse pression (3) sont entraínés par le réducteur de vitesses (4).Steam turbine (1) according to claim 1, characterized in that each module comprises a rotor and that the rotor of the high pressure module (2) and that of the low pressure module (3) are driven by the speed reducer (4) . Turbine à vapeur (1) selon la revendication 1, caractérisée en ce que les ailettes fixes ou les tuyères du module haute pression ont un profil comportant des canaux à forme convergente puis divergente de l'entrée vers la sortie.Steam turbine (1) according to claim 1, characterized in that the fixed fins or the nozzles of the high pressure module have a profile comprising channels with a convergent then diverging shape from the inlet to the outlet. Turbine à vapeur (1) selon la revendication 1, caractérisée en ce que le module haute pression (2) comporte une tuyère de forme convergent divergent.Steam turbine (1) according to claim 1, characterized in that the high pressure module (2) comprises a nozzle of diverging convergent shape. Turbine à vapeur (1) selon la revendication 3 ou 4, caractérisée en ce que la tuyère est mufti-canaux.Steam turbine (1) according to claim 3 or 4, characterized in that the nozzle is mufti-channels. Turbine à vapeur (1) selon la revendication 1, caractérisée en ce que le module haute pression (2) comporte une roue mobile solidaire d'un arbre (21) et supportant les ailettes (20), l'ensemble étant monobloc.Steam turbine (1) according to claim 1, characterized in that the high pressure module (2) comprises a movable wheel secured to a shaft (21) and supporting the fins (20), the assembly being in one piece. Turbine à vapeur (1) selon la revendication 6, caractérisée en ce que l'arbre (21) est couplé avec un réducteur de vitesse (4).Steam turbine (1) according to claim 6, characterized in that the shaft (21) is coupled with a speed reducer (4). Turbine à vapeur (1) selon la revendication 7, caractérisée en ce que l'arbre (21) est directement relié au réducteur (4).Steam turbine (1) according to claim 7, characterized in that the shaft (21) is directly connected to the reduction gear (4). Turbine à vapeur (1) selon la revendication 1, caractérisée en ce que le module haute pression (2) comporte une seule soupape de réglage de vapeur (8). Steam turbine (1) according to claim 1, characterized in that the high pressure module (2) has a single steam control valve (8). Turbine à vapeur selon la revendication 1, caractérisée en ce que le module haute pression comporte un palier indépendant (210).Steam turbine according to claim 1, characterized in that the high pressure module comprises an independent bearing (210).
EP04290986A 2003-04-17 2004-04-13 Steam turbine with a single stage high pressure module Withdrawn EP1473438A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0304815A FR2853929B1 (en) 2003-04-17 2003-04-17 STEAM TURBINE HAVING A HIGH PRESSURE BODY WITH A SINGLE FLOOR OF FINS
FR0304815 2003-04-17

Publications (2)

Publication Number Publication Date
EP1473438A2 true EP1473438A2 (en) 2004-11-03
EP1473438A3 EP1473438A3 (en) 2004-11-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290986A Withdrawn EP1473438A3 (en) 2003-04-17 2004-04-13 Steam turbine with a single stage high pressure module

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US (1) US7056086B2 (en)
EP (1) EP1473438A3 (en)
FR (1) FR2853929B1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191360A (en) * 1922-01-07 1923-05-17 Rateau Soc Improvements in or relating to fluid pressure turbines
US1494850A (en) * 1923-04-07 1924-05-20 Losel Franz Back-pressure turbine and method of utilizing high-pressure steam in turbines
FR726445A (en) * 1931-10-28 1932-05-28 Const Mecaniques De Saint Quen Low power steam turbine special construction device
US1925147A (en) * 1929-12-13 1933-09-05 Ljungstroms Angturbin Stockhol Elastic fluid turbine plant
FR1159936A (en) * 1955-12-19 1958-07-03 Worthington Corp Turbine
US4815931A (en) * 1982-05-11 1989-03-28 Aktiengesellschaft Kuehnle, Kopp & Kausch Overhung radial-flow steam turbine wheel with toothed and bolted shaft connection
DE29902285U1 (en) * 1999-02-10 1999-04-15 Schell, Otto, 91599 Dentlein Turbogenerator device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR980726A (en) * 1943-02-13 1951-05-17 Centre Nat Rech Scient Method and device for increasing the thermal efficiency of steam turbines
US2861776A (en) * 1951-12-26 1958-11-25 Herbert L Magill Reaction turbines
FR1320174A (en) * 1962-01-25 1963-03-08 Rateau Soc Improvement of turbine engine casings, in particular steam turbines
US3185854A (en) * 1964-08-14 1965-05-25 Gen Electric Turbine-generator
US3804335A (en) * 1973-05-21 1974-04-16 J Sohre Vaneless supersonic nozzle
US4150918A (en) * 1976-01-21 1979-04-24 Hollymatic Corporation Pressure gas engine
DE2625903A1 (en) * 1976-06-04 1977-12-15 Aeg Kanis Turbinen SINGLE-STAGE GEAR TURBINES
CA1061716A (en) * 1977-02-09 1979-09-04 James V. Theis (Jr.) Pressure gas engine
EP0539636B1 (en) * 1991-10-31 1996-06-05 Honda Giken Kogyo Kabushiki Kaisha Gas turbine engine
FR2700130B1 (en) * 1993-01-06 1995-02-03 Snecma Method for manufacturing a one-piece hollow blade rotor and one-piece hollow blade rotor.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191360A (en) * 1922-01-07 1923-05-17 Rateau Soc Improvements in or relating to fluid pressure turbines
US1494850A (en) * 1923-04-07 1924-05-20 Losel Franz Back-pressure turbine and method of utilizing high-pressure steam in turbines
US1925147A (en) * 1929-12-13 1933-09-05 Ljungstroms Angturbin Stockhol Elastic fluid turbine plant
FR726445A (en) * 1931-10-28 1932-05-28 Const Mecaniques De Saint Quen Low power steam turbine special construction device
FR1159936A (en) * 1955-12-19 1958-07-03 Worthington Corp Turbine
US4815931A (en) * 1982-05-11 1989-03-28 Aktiengesellschaft Kuehnle, Kopp & Kausch Overhung radial-flow steam turbine wheel with toothed and bolted shaft connection
DE29902285U1 (en) * 1999-02-10 1999-04-15 Schell, Otto, 91599 Dentlein Turbogenerator device

Also Published As

Publication number Publication date
US7056086B2 (en) 2006-06-06
FR2853929A1 (en) 2004-10-22
US20040219012A1 (en) 2004-11-04
FR2853929B1 (en) 2007-04-13
EP1473438A3 (en) 2004-11-10

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