EP0893578A1 - Sealed connecting device between the steam supply pipe and the internal body of the low-pressure stage of a steam turbine - Google Patents

Sealed connecting device between the steam supply pipe and the internal body of the low-pressure stage of a steam turbine Download PDF

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Publication number
EP0893578A1
EP0893578A1 EP98401770A EP98401770A EP0893578A1 EP 0893578 A1 EP0893578 A1 EP 0893578A1 EP 98401770 A EP98401770 A EP 98401770A EP 98401770 A EP98401770 A EP 98401770A EP 0893578 A1 EP0893578 A1 EP 0893578A1
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EP
European Patent Office
Prior art keywords
deformable
low
crown
pressure
steam
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Granted
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EP98401770A
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German (de)
French (fr)
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EP0893578B1 (en
Inventor
Jean-Luc Cecchetto
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Alstom SA
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GEC Alsthom Electromecanique SA
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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
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like
    • 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
    • F01D13/00—Combinations of two or more machines or engines
    • F01D13/02—Working-fluid interconnection of machines or engines
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings

Definitions

  • the present invention relates to the field steam turbines, and more specifically the connection between the steam inlet duct and the low pressure body of a steam turbine.
  • a piping connects the middle part pressure at the low pressure part. This piping leads to the arrival of steam from the internal body.
  • connection usually takes place by a compensator that cannot be reached for the disassembly only from inside the low-pressure part. This requires disassembly of several elements of this set, and results in a heavy intervention immobilizing the turbine for a important time.
  • the object of the invention presence is to remedy this drawback by proposing a device easily removable from outside the turbine, and a lower manufacturing cost.
  • the invention relates in its most general acceptance a device of the type consisting of a module suitable for mounting on the low-pressure outer casing, and incorporating a compensator capable of absorbing displacements of the end of the arrival sheath, characterized in that the connection between the sheath and the low pressure outer box is made by through a deformable tubular element of which the upper end is secured to the box exhaust and whose lower end is integral with a connecting flange of the inlet sheath of steam with the low-pressure body.
  • the tubular element deformable consists of a wavy shaped sleeve this bellows.
  • the exhaust box has an annular crown with an internal diameter significantly greater than outside diameter of the steam inlet duct, said crown having bores allowing the attachment of a complementary crown tubular elements deformable by means of of bolts accessible from the outside of the enclosure the low-pressure stage.
  • the tubular element deformable is fixed to its lower part on the flange surrounding the low pressure body via an inner ring connected to said flange by bolts accessible from the outside of the casing low pressure module.
  • the outer surface of the steam inlet duct and the inner surface of the deformable cylindrical element defines a space ring at the bottom of which is located the crown lower fixing of the tubular element on the low pressure body.
  • the device has an annular protection plate closing off the space between the crown complementary attached to the upper end of the deformable element, and the wall of the inlet sheath steam.
  • the deformable tubular element is extended by a length adjustment ferrule.
  • the deformable tubular element is protected by a rigid outer tubular plate with a length greater than the length of the tubular member deformable.
  • FIG. 1 shows a sectional view cross-section of a low-pressure module.
  • This module is consisting of an upper outer casing (1) and by a lower outer casing (2).
  • the envelope external is made of welded sheets. She is internally stiffened by ribs (3) and is braced by round irons (4) arranged in trellis.
  • the lower part of this envelope (2) is supported on the block (5) by a sole (6) reinforced by gussets. This conception of external structure provides good load distribution on the massif.
  • the internal body (7) made of welded construction rests on the lower part of the casing at the level of the side flanges (8) of its horizontal joint.
  • the admission area is limited by an annular chamber (9).
  • the steam supply passes through the envelope (1) at a hole whose cross section is significantly greater than the outer section of the arrival.
  • the difference in section allows a game sufficient lateral to absorb various displacements resulting from the forces transmitted by the pipes of steam (10) due to expansion phenomena.
  • This inlet is connected to the section intake (13) of the internal body by a flange exterior (14).
  • This sleeve (15) surrounds the lower end (16) of the sheath (10).
  • the upper part (17) of the sleeve (15) is welded to an outer ring (18) of annular shape and having an inner section corresponding to the outer section of the part upper (17) of the sleeve (15).
  • This outer crown (18) is bolted to a welded complementary crown (20) on the outer casing (1).
  • a seal (21) is interposed between the two crowns (18, 20).
  • the lower end (23) of the sleeve (15) is extended by a tubular ferrule (24).
  • This ferrule adjusts the length of the device to moment of assembling the turbine, and catching up misalignment by cutting this ferrule ring at ad-hoc height.
  • This ferrule is welded to an annular plate (26) ensuring the connection with a inner crown (27) whose outer diameter is at most equal to the inside diameter of the ferrule and the sleeve (15), and whose internal diameter is at most equal to the outside diameter of the steam supply.
  • This crown (27) forms a spacer coming position between the two parts (28, 29) of the flange connecting the sheath (10) on the body (13).
  • seals (30, 31) seal between the crown (27) and the two parts (28, 29) of the flange.
  • bolts (32) secure the assembly.
  • the sleeve (15) is protected by two tubular plates (34, 35) surrounding the surface outer and inner surface of the sleeve.
  • moon at least one of these plates (34, 35) has a length greater than the length of the sleeve (15), in order to avoid damage to the lower surface of the sleeve when placed on the ground.
  • these tubular plates protect the surface of the sleeve (15) against shocks likely to occur during handling, especially during the phases of assembly or disassembly.
  • a protective plate (36) closes the gap between the outer wall of the sheath (10) and the crown (18). This plaque presents an interior cut adapted to allow transverse displacement of the sheath (10).
  • Figure 3 shows a detailed view of the connection of the sleeve with the fixing crown.
  • the sleeve (15) is welded to the edge internal (40) of the crown, as well as the edge upper of the internal protection plate (34).
  • This protective plate has a shape tubular, with a flared upper part (41).
  • the outer plate (35) is welded to the surface lower (42) of the crown (8).
  • Figure 4 shows a detailed view of fixing the lower part of the sleeve (15).
  • the first part (28) of the flange of fixing is welded on the outer wall of the sheath steam inlet (10) by two weld beads (50 51).
  • the second part (29) of the flange is welded to the inlet (13) of the low pressure body by two weld beads (52, 53).
  • the crown (27) is welded to the plate connection (26).
  • the crown (27) is bolted to the lower part (29) of the flange by bolts including the head is inserted into a cavity (55) to avoid to be flush with the surface of the crown (27).
  • the part upper (28) of the flange is bolted to the crown (27) forming a spacer between the two flange spreads.

Abstract

A deformable bellow shaped tubular sleeve (15) has its upper end fixed to the exhaust chest of the low pressure body and its lower end fixed by a connection flange on the steam inlet duct (10) to the low pressure body. The exhaust chest comprises an external annular ring (18) with internal diameter greater than the external diameter of the steam inlet duct. This ring has bores enabling a complementary ring (20) to be fixed to the sleeve by bolts accessible from outside the low pressure casing. A gasket (21) is inserted between the two rings.

Description

La présente invention concerne le domaine des turbines à vapeur, et plus précisément le raccordement entre la gaine d'arrivée de vapeur et le corps basse pression d'une turbine à vapeur.The present invention relates to the field steam turbines, and more specifically the connection between the steam inlet duct and the low pressure body of a steam turbine.

Le module basse-pression est composé de deux ensembles indépendants :

  • une enveloppe externe reliée à la manchette du condenseur et résistant à la pression atmosphérique. Cette enveloppe est portée par le massif et ne comporte pas de partie chaude ;
  • un corps interne à deux flux symétriques renfermant la veine de vapeur. Il porte les diaphragmes basse-pression.
The low-pressure module is made up of two independent sets:
  • an outer jacket connected to the condenser sleeve and resistant to atmospheric pressure. This envelope is carried by the massif and does not have a hot part;
  • an internal body with two symmetrical flows enclosing the vapor stream. It carries low pressure diaphragms.

Une tuyauterie relie la partie moyenne pression à la partie basse pression. Cette tuyauterie débouche dans l'arrivée de vapeur du corps interne.A piping connects the middle part pressure at the low pressure part. This piping leads to the arrival of steam from the internal body.

Les différences de température provoquent des dilatations dont l'amplitude peut atteindre plusieurs centimètres. Il est donc nécessaire d'assurer le raccordement entre la gaine d'arrivée de vapeur et la corps basse-pression avec des moyens de compensation.Temperature differences cause dilations of which the amplitude can reach several centimeters. It is therefore necessary to ensure the connection between the steam inlet duct and the low pressure body with means of compensation.

Le raccordement s'effectue habituellement par un compensateur qui ne peut être atteint pour le démontage que par l'intérieur de la partie basse-pression. Cela impose un démontage de plusieurs éléments de cet ensemble, et se traduit par une intervention lourde immobilisant la turbine pendant un temps important.Connection usually takes place by a compensator that cannot be reached for the disassembly only from inside the low-pressure part. This requires disassembly of several elements of this set, and results in a heavy intervention immobilizing the turbine for a important time.

L'objet de la présence invention est de remédier à cet inconvénient en proposant un dispositif de raccordement facilement démontable de l'extérieur de la turbine, et d'une coût de fabrication moindre. The object of the invention presence is to remedy this drawback by proposing a device easily removable from outside the turbine, and a lower manufacturing cost.

A cet effet, l'invention concerne dans son acception la plus générale un dispositif du type constitué par un module propre à être monté sur l'enveloppe extérieure de basse-pression, et incorporant un compensateur propre à absorber les déplacements de l'extrémité de la gaine d'arrivée, caractérisé en ce que la liaison entre la gaine et la boíte extérieure basse-pression est réalisée par l'intermédiaire d'un élément tubulaire déformable dont l'extrémité supérieure est solidaire de la boíte d'échappement et dont l'extrémité inférieure est solidaire d'une bride de liaison de la gaine d'arrivée de vapeur avec le corps basse-pression.To this end, the invention relates in its most general acceptance a device of the type consisting of a module suitable for mounting on the low-pressure outer casing, and incorporating a compensator capable of absorbing displacements of the end of the arrival sheath, characterized in that the connection between the sheath and the low pressure outer box is made by through a deformable tubular element of which the upper end is secured to the box exhaust and whose lower end is integral with a connecting flange of the inlet sheath of steam with the low-pressure body.

Avantageusement, l'élément tubulaire déformable est constitué par un manchon ondulé en forme ce soufflet.Advantageously, the tubular element deformable consists of a wavy shaped sleeve this bellows.

Selon une variance de réalisation préférée, la boíte d'échappement comporte une couronne annulaire d'un diamètre intérieur sensiblement supérieur au diamètre extérieur de la gaine d'arrivée de vapeur, ladite couronne présentant des alésages permettant la fixation d'une couronne complémentaire solidaire d'éléments tubulaires déformables par l'intermédiaire de boulons accessibles de l'extérieur de l'enveloppe de l'étage basse-pression.According to a preferred embodiment variance, the exhaust box has an annular crown with an internal diameter significantly greater than outside diameter of the steam inlet duct, said crown having bores allowing the attachment of a complementary crown tubular elements deformable by means of of bolts accessible from the outside of the enclosure the low-pressure stage.

Avantageusement, l'élément tubulaire déformable est fixé à sa partie inférieure sur la bride entourant le corps basse-pression par l'intermédiaire d'une couronne intérieure reliée à ladite bride par des boulons accessibles de l'extérieur de l'enveloppe du module basse-pression.Advantageously, the tubular element deformable is fixed to its lower part on the flange surrounding the low pressure body via an inner ring connected to said flange by bolts accessible from the outside of the casing low pressure module.

De préférence, la surface extérieure de la gaine d'arrivée de vapeur et la surface intérieure de l'élément cylindrique déformable délimite un espace annulaire au fond duquel est située la couronne inférieure de fixation de l'élément tubulaire sur le corps basse-pression.Preferably, the outer surface of the steam inlet duct and the inner surface of the deformable cylindrical element defines a space ring at the bottom of which is located the crown lower fixing of the tubular element on the low pressure body.

Selon une variante avantageuse, le dispositif comporte une plaque annulaire de protection obturant l'espace subsistant entre la couronne complémentaire fixée à l'extrémité supérieure de l'élément déformable, et la paroi de la gaine d'arrivée de vapeur.According to an advantageous variant, the device has an annular protection plate closing off the space between the crown complementary attached to the upper end of the deformable element, and the wall of the inlet sheath steam.

Selon une autre variante de réalisation, l'élément tubulaire déformable est prolongé par une virole d'ajustement de la longueur.According to another alternative embodiment, the deformable tubular element is extended by a length adjustment ferrule.

Selon une autre variante avantageuse, l'élément tubulaire déformable est protégé par une plaque tubulaire rigide extérieure d'une longueur supérieure à la longueur de l'élément tubulaire déformable.According to another advantageous variant, the deformable tubular element is protected by a rigid outer tubular plate with a length greater than the length of the tubular member deformable.

L'invention sera mieux comprise à la lecture de la description qui suit, se référant aux dessins annexés relatifs à des exemples non limitatifs de réalisation où :

  • la figure 1 représente une vue d'ensemble du module basse-pression ;
  • la figure 2 représente une vue éclatée en trois dimensions d'un dispositif selon l'invention ;
  • la figure 3 représente une vue en détail du raccordement du manchon avec la couronne de fixation ;
  • la figure 4 représente une vue en détail de la fixation de la partie inférieure du manchon.
The invention will be better understood on reading the description which follows, referring to the appended drawings relating to nonlimiting exemplary embodiments where:
  • Figure 1 shows an overview of the low-pressure module;
  • FIG. 2 represents an exploded view in three dimensions of a device according to the invention;
  • Figure 3 shows a detailed view of the connection of the sleeve with the fixing ring;
  • Figure 4 shows a detailed view of the fixing of the lower part of the sleeve.

La figure 1 représente une vue en coupe transversale d'un module basse-pression. Ce module est constitué par une enveloppe externe supérieure (1) et par une enveloppe externe inférieure (2). L'enveloppe externe est réalisée en tôles soudées. Elle est rigidifiée intérieurement par des nervures (3) et est entretoisée par des fers ronds (4) disposés en treillis. La partie inférieure de cette enveloppe (2) prend appui sur le massif (5) par une semelle (6) renforcée par des goussets. Cette conception de la structure externe permet d'obtenir une bonne répartition des charges sur le massif.Figure 1 shows a sectional view cross-section of a low-pressure module. This module is consisting of an upper outer casing (1) and by a lower outer casing (2). The envelope external is made of welded sheets. She is internally stiffened by ribs (3) and is braced by round irons (4) arranged in trellis. The lower part of this envelope (2) is supported on the block (5) by a sole (6) reinforced by gussets. This conception of external structure provides good load distribution on the massif.

Le corps interne (7) réalisé en construction soudée repose sur la partie inférieure de l'enveloppe au niveau des brides latérales (8) de son joint horizontal. La zone d'admission est limitée par une chambre annulaire (9).The internal body (7) made of welded construction rests on the lower part of the casing at the level of the side flanges (8) of its horizontal joint. The admission area is limited by an annular chamber (9).

La vapeur provient de l'étage moyenne pression par une tuyauterie (10). Cette tuyauterie est raccordée par l'intermédiaire d'une entretoise (11) à l'arrivée de vapeur du corps. Compte tenu des effets de dilatation de la tuyauterie, cette entretoise (11) est susceptible de se déplacer tant transversalement que verticalement. Pour absorber ces déplacements, un compensateur (12) est prévu entre l'enveloppe supérieure (1) de la boíte externe, et l'entretoise (11). Ce compensateur remplit par ailleurs des fonctions d'étanchéité.Steam comes from the middle floor pressure by a pipe (10). This piping is connected via a spacer (11) to the arrival of body vapor. Given the effects of expansion of the piping, this spacer (11) is likely to move both transversely and vertically. To absorb these displacements, a compensator (12) is provided between the envelope upper (1) of the outer box, and the spacer (11). This compensator also fulfills sealing functions.

Il est décrit plus en détail dans la description qui suit.It is described in more detail in the description which follows.

L'arrivée de vapeur traverse l'enveloppe (1) au niveau d'un trou dont la section est sensiblement supérieure à la section extérieure de l'arrivée. La différence de section autorise un jeu latéral suffisant pour absorber les déplacements divers résultant des efforts transmis par les tuyauteries de vapeur (10) en raison des phénomènes de dilatation.The steam supply passes through the envelope (1) at a hole whose cross section is significantly greater than the outer section of the arrival. The difference in section allows a game sufficient lateral to absorb various displacements resulting from the forces transmitted by the pipes of steam (10) due to expansion phenomena.

Cette arrivée est raccordée sur le tronçon d'admission (13) du corps interne par une bride extérieure (14).This inlet is connected to the section intake (13) of the internal body by a flange exterior (14).

L'étanchéité est assurée par un manchon déformable élastiquement (15) en acier inoxydable ou en un matériau analogue, présentant une forme de soufflet. Ce manchon (15) entoure l'extrémité inférieure (16) de la gaine (10). La partie supérieure (17) du manchon (15) est soudée sur une couronne extérieure (18) de forme annulaire et présentant une section intérieure correspondant à la section extérieure de la partie supérieure (17) du manchon (15).Sealing is ensured by a sleeve elastically deformable (15) of stainless steel or a similar material, having a bellows shape. This sleeve (15) surrounds the lower end (16) of the sheath (10). The upper part (17) of the sleeve (15) is welded to an outer ring (18) of annular shape and having an inner section corresponding to the outer section of the part upper (17) of the sleeve (15).

Cette couronne extérieure (18) est boulonnée sur une couronne complémentaire (20) soudée sur l'enveloppe externe (1). Un joint d'étanchéité (21) est intercalé entre les deux couronnes (18, 20).This outer crown (18) is bolted to a welded complementary crown (20) on the outer casing (1). A seal (21) is interposed between the two crowns (18, 20).

L'extrémité inférieure (23) du manchon (15) est prolongée par une virole (24) tubulaire. Cette virole permet d'ajuster la longueur du dispositif au moment de l'assemblage de la turbine, et de rattraper des défauts d'alignement par la découpe de cette virole annulaire à la hauteur ad-hoc.The lower end (23) of the sleeve (15) is extended by a tubular ferrule (24). This ferrule adjusts the length of the device to moment of assembling the turbine, and catching up misalignment by cutting this ferrule ring at ad-hoc height.

L'extrémité de cette virole est soudée sur une plaque annulaire (26) assurant la liaison avec une couronne intérieure (27) dont le diamètre externe est au plus égale au diamètre intérieur de la virole et du manchon (15), et dont le diamètre intérieur est au plus égal au diamètre extérieur de l'arrivée de vapeur. Cette couronne (27) forme une entretoise venant se positionner entre les deux parties (28, 29) de la bride de liaison de la gaine (10) sur le corps (13). Des joints (30, 31) assurent l'étanchéité entre la couronne (27) et les deux parties (28, 29) de la bride. Des boulons (32) assurent la fixation de l'ensemble. Ces boulons sont accessibles de l'extérieur, à travers l'espace annulaire (33) délimité par la paroi extérieure de la gaine (10) et la paroi intérieure du manchon (15), et s'ouvrant par la découpe (12) de l'enveloppe externe (1). Il est ainsi possible de démonter l'arrivée de l'extérieur de la turbine, sans avoir à retirer l'enveloppe externe (1). The end of this ferrule is welded to an annular plate (26) ensuring the connection with a inner crown (27) whose outer diameter is at most equal to the inside diameter of the ferrule and the sleeve (15), and whose internal diameter is at most equal to the outside diameter of the steam supply. This crown (27) forms a spacer coming position between the two parts (28, 29) of the flange connecting the sheath (10) on the body (13). Of seals (30, 31) seal between the crown (27) and the two parts (28, 29) of the flange. Of bolts (32) secure the assembly. These bolts are accessible from the outside, through the annular space (33) delimited by the wall outer of the sheath (10) and the inner wall of the sleeve (15), and opening by the cutout (12) of the outer casing (1). It is thus possible to dismantle the inlet from the outside of the turbine, without have to remove the outer casing (1).

Le manchon (15) est protégé par deux plaques tubulaires (34, 35) entourant la surface extérieure et la surface intérieure du manchon. L'une au moins de ces plaques (34, 35) présente une longueur supérieure à la longueur du manchon (15), afin d'éviter l'endommagement de la surface inférieure du manchon lorsqu'il est posé sur le sol. Par ailleurs, ces plaques tubulaires protègent la surface du manchon (15) contre les chocs susceptibles de se produire pendant les manipulations, notamment pendant les phases de montage ou de démontage.The sleeve (15) is protected by two tubular plates (34, 35) surrounding the surface outer and inner surface of the sleeve. Moon at least one of these plates (34, 35) has a length greater than the length of the sleeve (15), in order to avoid damage to the lower surface of the sleeve when placed on the ground. Furthermore, these tubular plates protect the surface of the sleeve (15) against shocks likely to occur during handling, especially during the phases of assembly or disassembly.

Afin d'éviter la chute inopinée d'outils dans l'espace creux (33), une plaque de protection (36) obture l'intervalle entre la paroi extérieure de la gaine (10) et la couronne (18). Cette plaque présente une découpe intérieure adaptée afin de permettre le déplacement transversal de la gaine (10).To prevent tools from dropping unexpectedly in the hollow space (33), a protective plate (36) closes the gap between the outer wall of the sheath (10) and the crown (18). This plaque presents an interior cut adapted to allow transverse displacement of the sheath (10).

La figure 3 représente une vue en détail du raccordement du manchon avec la couronne de fixation.Figure 3 shows a detailed view of the connection of the sleeve with the fixing crown.

Le manchon (15) est soudé sur la tranche interne (40) de la couronne, de même que le bord supérieur de la plaque de protection interne (34). Cette plaque de protection présente une forme tubulaire, avec une partie supérieure (41) évasée. La plaque extérieure (35) est soudée à la surface inférieure (42) de la couronne (8).The sleeve (15) is welded to the edge internal (40) of the crown, as well as the edge upper of the internal protection plate (34). This protective plate has a shape tubular, with a flared upper part (41). The outer plate (35) is welded to the surface lower (42) of the crown (8).

La figure 4 représente une vue en détail de la fixation de la partie inférieure du manchon (15).Figure 4 shows a detailed view of fixing the lower part of the sleeve (15).

La première partie (28) de la bride de fixation est soudée sur la paroi extérieure de la gaine d'arrivée de vapeur (10) par deux cordons de soudure (50 51). De même, la deuxième partie (29) de la bride est soudée sur l'admission (13) du corps basse pression par deux cordons de soudure (52, 53).The first part (28) of the flange of fixing is welded on the outer wall of the sheath steam inlet (10) by two weld beads (50 51). Likewise, the second part (29) of the flange is welded to the inlet (13) of the low pressure body by two weld beads (52, 53).

La couronne (27) est soudée sur la plaque de liaison (26). La couronne (27) est boulonnée sur la partie inférieure (29) de la bride par des boulons dont la tête est enfoncée dans une cavité (55) pour éviter d'affleurer à la surface de la couronne (27). La partie supérieure (28) de la bride est boulonnée sur la couronne (27) formant une entretoise entre les deux tarties de la bride.The crown (27) is welded to the plate connection (26). The crown (27) is bolted to the lower part (29) of the flange by bolts including the head is inserted into a cavity (55) to avoid to be flush with the surface of the crown (27). The part upper (28) of the flange is bolted to the crown (27) forming a spacer between the two flange spreads.

Pour le démontage, on accède aux boulons assurant la liaison entre la partie supérieure (28) de la bride et la couronne (27) après avoir retiré la plaque de protection (36) obturant l'espace tubulaire (33) prévu entre la paroi extérieure de la gaine (10) et la paroi intérieure du dispositif de compensation. Cet espace est suffisamment large pour permettre le passage d'un outil permettant le dévissage des boulons et la libération de la gaine (10).For disassembly, access to the bolts ensuring the connection between the upper part (28) of the flange and the crown (27) after removing the protective plate (36) closing the tubular space (33) provided between the outer wall of the sheath (10) and the inner wall of the compensation device. This space is large enough to allow the passage of a tool allowing the unscrewing of the bolts and releasing the sheath (10).

Après le retrait de la gaine (10), on accède aux boulons assurant la liaison entre la couronne (27) et la partie inférieure (29) de la bride. On dévisse également les boulons assurant la liaison entre la couronne supérieure (18) et l'enveloppe externe (1). On peut alors retirer le dispositif de compensation en le retirant verticalement.After removing the sheath (10), we access the bolts connecting the crown (27) and the lower part (29) of the flange. We also unscrew the bolts ensuring the connection between the upper crown (18) and the envelope external (1). We can then remove the compensation by removing it vertically.

Claims (8)

Dispositif étanche pour le raccordement entre la gaine d'arrivée de vapeur (10) et le corps interne (7) de l'ensemble basse pression d'une turbine à vapeur, du type constitué par un module propre à être monté sur l'enveloppe extérieure basse-pression, et incorporant un moyen propre à absorber les déplacements de l'extrémité de la gaine d'arrivée, caractérisé en ce que la liaison entre la gaine d'arrivée de vapeur (10) et l'enveloppe (1) de la boíte d'échappement est réalisée par l'intermédiaire d'un élément tubulaire déformable (15) dont l'extrémité supérieure est solidaire de la boíte d'échappement basse-pression et dont l'extrémité inférieure est solidaire d'une bride de liaison de la gaine d'arrivée de vapeur (10) avec le corps basse-pression (7).Watertight device for connection between the steam supply duct (10) and the body internal (7) of the low pressure assembly of a turbine steam, of the type constituted by a module capable of being mounted on the low-pressure outer casing, and incorporating a means suitable for absorbing displacements from the end of the inlet sheath, characterized in that that the connection between the steam inlet duct (10) and the casing (1) of the exhaust box is produced by means of a tubular element deformable (15) whose upper end is integral with the low-pressure exhaust box and the lower end of which is secured to a flange connecting the steam inlet duct (10) with the low-pressure body (7). Dispositif selon la revendication 1 caractérisé en ce que l'élément tubulaire déformable (15) est constitué par un manchon ondulé en forme de souffler.Device according to claim 1 characterized in that the deformable tubular element (15) consists of a corrugated sleeve in the form of blow. Dispositif selon la revendication 1 ou 2 caractérisé en ce que la boíte d'échappement comporte une couronne annulaire d'un diamètre intérieur sensiblement supérieur au diamètre extérieur de la gaine d'arrivée de vapeur (10), ladite couronne présentant des alésages permettant la fixation d'une couronne complémentaire solidaire de l'élément tubulaire déformable (15) par l'intermédiaire de boulons accessibles de l'extérieur de l'enveloppe de basse-pression.Device according to claim 1 or 2 characterized in that the exhaust box comprises an annular crown with an inner diameter significantly greater than the outside diameter of the steam inlet sheath (10), said crown having bores allowing the attachment of a complementary crown secured to the element deformable tubular (15) via bolts accessible from outside the enclosure low pressure. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'élément tubulaire déformable (15) est fixé à sa partie inférieure sur la bride entourant le corps basse-pression par l'intermédiaire d'une couronne intérieure reliée à ladite bride par des boulons accessibles de l'extérieur de l'enveloppe de basse-pression.Device according to any one of previous claims characterized in that the deformable tubular element (15) is fixed to its lower part on the flange surrounding the body low pressure through a crown inner connected to said flange by bolts accessible from outside the low-pressure enclosure. Dispositif selon l'une au moins des revendications 3 à 4 caractérisé en ce que la surface extérieure de la gaine d'arrivée de vapeur (10) et la surface intérieure de l'élément cylindrique déformable délimite un espace annulaire au fond duquel est située la couronne inférieure de fixation de l'élément tubulaire sur le corps basse-pression.Device according to at least one of claims 3 to 4 characterized in that the surface outside of the steam inlet duct (10) and the inner surface of the deformable cylindrical element delimits an annular space at the bottom of which is located the lower element fixing crown tubular on the low-pressure body. Dispositif selon l'une au moins des revendications 3 à 5 caractérisé en ce qu'il comporte une plaque annulaire de protection obturant l'espace subsistant entre la couronne complémentaire fixée à l'extrémité supérieure de l'élément déformable, et la paroi de la gaine d'arrivée de vapeur (10).Device according to at least one of Claims 3 to 5 characterized in that it comprises an annular protective plate closing off the space remaining between the complementary crown fixed at the upper end of the deformable element, and the wall of the steam inlet duct (10). Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'élément tubulaire déformable (15) est prolongé par une virole d'ajustement de la longueur.Device according to any one of previous claims characterized in that the deformable tubular element (15) is extended by a length adjustment ferrule. Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce que l'élément tubulaire déformable (15) est protégé par une plaque tubulaire rigide extérieure d'une longueur supérieure à la longueur de l'élément tubulaire déformable (15).Device according to any one of previous claims characterized in that the deformable tubular element (15) is protected by a rigid outer tubular plate with a length greater than the length of the tubular member deformable (15).
EP19980401770 1997-07-21 1998-07-13 Sealed connecting device between the steam supply pipe and the internal body of the low-pressure stage of a steam turbine Expired - Lifetime EP0893578B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9709208 1997-07-21
FR9709208A FR2766233B1 (en) 1997-07-21 1997-07-21 WATERPROOF DEVICE FOR CONNECTION BETWEEN THE STEAM INLET AND THE INTERNAL BODY OF THE LOW-PRESSURE ASSEMBLY OF A STEAM TURBINE

Publications (2)

Publication Number Publication Date
EP0893578A1 true EP0893578A1 (en) 1999-01-27
EP0893578B1 EP0893578B1 (en) 2004-03-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980401770 Expired - Lifetime EP0893578B1 (en) 1997-07-21 1998-07-13 Sealed connecting device between the steam supply pipe and the internal body of the low-pressure stage of a steam turbine

Country Status (4)

Country Link
EP (1) EP0893578B1 (en)
JP (1) JPH1193615A (en)
DE (1) DE69822563T2 (en)
FR (1) FR2766233B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469044A1 (en) * 2010-12-24 2012-06-27 Alstom Technology Ltd Module for a steam turbine
CN102588008A (en) * 2012-03-19 2012-07-18 山东齐鲁电机制造有限公司 Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine
EP2927431A1 (en) * 2014-04-02 2015-10-07 Siemens Aktiengesellschaft Component for guiding of hot gas

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2635107T3 (en) 2013-02-05 2017-10-02 General Electric Technology Gmbh Thermoelectric steam power plant with a second low pressure turbine and an additional condensation system and procedure for the operation of said steam thermoelectric power plant
CN104481606B (en) * 2014-11-25 2016-02-17 东方电气集团东方汽轮机有限公司 A kind of test partition board of steam turbine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196766A (en) * 1937-07-10 1940-04-09 Eastman Kodak Co Expansion joint
US2437385A (en) * 1941-11-21 1948-03-09 Dehavilland Aircraft Jet propulsion plant
FR1440338A (en) * 1965-06-25 1966-05-27 Licentia Gmbh Device applicable to the overflow pipe of steam turbines, in particular in low pressure casings with several envelopes with central inlet
US5243815A (en) * 1991-06-07 1993-09-14 Mtu Motoren Und Turbinen-Union Munchen Gmbh Assembly of a heat exchanger on a gas turbine engine
US5427419A (en) * 1992-02-15 1995-06-27 Asea Brown Boveri Ltd. Pipe system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196766A (en) * 1937-07-10 1940-04-09 Eastman Kodak Co Expansion joint
US2437385A (en) * 1941-11-21 1948-03-09 Dehavilland Aircraft Jet propulsion plant
FR1440338A (en) * 1965-06-25 1966-05-27 Licentia Gmbh Device applicable to the overflow pipe of steam turbines, in particular in low pressure casings with several envelopes with central inlet
US5243815A (en) * 1991-06-07 1993-09-14 Mtu Motoren Und Turbinen-Union Munchen Gmbh Assembly of a heat exchanger on a gas turbine engine
US5427419A (en) * 1992-02-15 1995-06-27 Asea Brown Boveri Ltd. Pipe system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469044A1 (en) * 2010-12-24 2012-06-27 Alstom Technology Ltd Module for a steam turbine
CN102536356A (en) * 2010-12-24 2012-07-04 阿尔斯通技术有限公司 Module for a steam turbine
US9091181B2 (en) 2010-12-24 2015-07-28 Alstom Technology Ltd. Module for a steam turbine
CN102536356B (en) * 2010-12-24 2015-11-25 阿尔斯通技术有限公司 Steam turbine module
CN102588008A (en) * 2012-03-19 2012-07-18 山东齐鲁电机制造有限公司 Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine
CN102588008B (en) * 2012-03-19 2014-12-10 山东齐鲁电机制造有限公司 Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine
EP2927431A1 (en) * 2014-04-02 2015-10-07 Siemens Aktiengesellschaft Component for guiding of hot gas

Also Published As

Publication number Publication date
FR2766233B1 (en) 2001-12-07
EP0893578B1 (en) 2004-03-24
DE69822563T2 (en) 2005-04-07
JPH1193615A (en) 1999-04-06
DE69822563D1 (en) 2004-04-29
FR2766233A1 (en) 1999-01-22

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