EP2161415B1 - Dispositif et procédé de réduction de la pression sur un joint de séparation entre au moins deux éléments de limitation - Google Patents

Dispositif et procédé de réduction de la pression sur un joint de séparation entre au moins deux éléments de limitation Download PDF

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Publication number
EP2161415B1
EP2161415B1 EP09166731.1A EP09166731A EP2161415B1 EP 2161415 B1 EP2161415 B1 EP 2161415B1 EP 09166731 A EP09166731 A EP 09166731A EP 2161415 B1 EP2161415 B1 EP 2161415B1
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EP
European Patent Office
Prior art keywords
cavity
delimiting
line
shielding element
seal
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.)
Not-in-force
Application number
EP09166731.1A
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German (de)
English (en)
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EP2161415A3 (fr
EP2161415A2 (fr
Inventor
Detlef Haje
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2161415A2 publication Critical patent/EP2161415A2/fr
Publication of EP2161415A3 publication Critical patent/EP2161415A3/fr
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Publication of EP2161415B1 publication Critical patent/EP2161415B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/005—Sealing means between non relatively rotating elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49323—Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles

Definitions

  • the present invention relates to a device, in particular a steam turbine, comprising at least a first boundary part and at least a second boundary part, wherein the boundary parts are fastened to each other to form a parting line and thereby enclose at least a portion of a first pressure chamber. Furthermore, the invention relates to a method for lowering the on a parting line, which is formed by the joining together of at least a first boundary part and at least a second boundary part of a device, in particular a steam turbine, acting pressure and to reduce the forces acting on the parting line fastening forces, wherein the Enclosing parts enclose at least a portion of a first pressure chamber.
  • a flow channel is formed by various boundary parts or flow channel parts which are joined together.
  • the flow channel formed is subjected to superheated steam under high pressure.
  • Along the longitudinal axis of the flow channel pressure chambers are formed with different levels of internal pressures. Therefore, it is crucial that the connection of the various boundary parts is sufficiently dense, so that no leaks occur. This is particularly difficult because in a steam turbine steam or steam temperatures of more than 600 ° C can occur at a vapor pressure of about 250 bar.
  • a parting line is formed, with four boundary parts a so-called cross-sectional joint.
  • a cross-sectional joint has both a horizontal and a vertical parting line.
  • the formation of a cross-sectional joint is required if for manufacturing reasons or from Due to the choice of materials the first boundary parts and the second boundary parts of the flow channel separated, must be performed.
  • the limitation parts generally have different materials with different thermal expansion coefficients and different constructions.
  • a boundary part of a cast steel and the other boundary part may be formed as a welded construction or of a ductile iron.
  • the flange connection on the joints, in particular the cross-part joints must be designed for overpressure, for underpressure or usually for changing pressure conditions.
  • a steam turbine with a double-walled flange connection with an outer flange and provided with, between which a through-flow of a cooling medium space is formed.
  • the object of the invention is to provide a device and a method which make it possible to reduce the pressure and the forces on a parting line, in particular on a cross-sectional joint, between at least two mutually attached boundary parts of the device, in particular a steam turbine reduce if high pressures occur during operation of the device.
  • a cross-sectional joint at boundary parts of a steam turbine is to be made accessible to a larger area of use.
  • the object is achieved by a device, in particular a steam turbine, comprising at least a first boundary part and at least a second boundary part, wherein the boundary parts are fastened to each other to form a parting line and thereby enclose at least a portion of a first pressure chamber, in the a shielding element is provided on the sides facing the first pressure chamber sides of the limiting parts, which is arranged sealingly opposite the at least one first boundary part and the at least one second boundary part and thereby completely covers the parting line, so that between the boundary parts and the shielding element a cavity is formed, and that a conduit is guided into the cavity, which connects the cavity with a second pressure chamber, dissolved.
  • a device in particular a steam turbine, comprising at least a first boundary part and at least a second boundary part, wherein the boundary parts are fastened to each other to form a parting line and thereby enclose at least a portion of a first pressure chamber
  • a shielding element is provided on the sides facing the first pressure chamber sides of the
  • the core of the invention is that the region of the parting line which faces the first pressure chamber is subjected to a lower pressure than prevails in the flow channel when the device, in particular the steam turbine, is in operation.
  • the forces acting on the attachment of the limiting parts in particular the axial forces, can be reduced.
  • the at least one first and the at least one second boundary part of the device are joined together.
  • a parting line, in particular a cross-sectional joint is formed.
  • the limitation parts are fastened to each other in particular by means of fastening screws.
  • a shielding element is provided on the sides of the delimiting parts facing the first pressure chamber, which is sealingly arranged relative to the at least one first delimiting part and the at least one second delimiting part, thereby completely covering the parting line.
  • a cavity is formed between the boundary parts and the shielding in the region of the parting line.
  • a conduit is guided, which connects the cavity with a second, external pressure chamber. If the boundary parts form a flow channel of a steam turbine, then the area of the parting line or the cross-part joint is protected on the steam side by the shielding element, so that lower environmental parameters, ie a lower pressure and a moderately lower temperature, can be set in this shielded area.
  • the pressure in the cavity can be adjusted to the pressure in the second pressure chamber.
  • the shielding effect is achieved in that a shielding element located inside the first pressure space formed by the delimiting parts completely covers the parting line or the cross-parting joint and seals on all sides of the joint, ie is arranged sealingly opposite at least one first and at least one second delimiting part.
  • the pressure reduction takes place through the line which connects the cavity between the shielding, the boundary parts and the joint with a second pressure chamber located further downstream in the expansion.
  • the second pressure chamber or the line to the second pressure chamber may, for example, be fixed to the inside of the at least one first and / or the at least one second boundary part or to a guide blade carrier of the device, in particular the steam turbine.
  • Such a device or such a steam turbine makes it possible to make the area of use of a joint joint, in particular a cross-part joint connection, accessible between the delimiting parts to a larger area of use.
  • a reduction of the pressure in the cavity by about 15 to 20 bar compared to the pressure in the first pressure chamber of the steam turbine formed by the boundary parts can be achieved. Furthermore, a reduction of the effective internal pressure-related axial forces on the fastening screws by about 1/3 compared to conventional steam turbines is possible.
  • the pressure reduction is accompanied by a moderate temperature reduction by throttling. This throttling comes about by the pressure reduction of any leakage mass flows from the interior into the cavity without performing technical work.
  • the shielding element can be designed in various ways. For example, this may have an angular or a curved profile.
  • the parting line may for example be formed next to a cross-parting joint as a Stoßteilfuge.
  • three boundary parts abut each other.
  • the at least one first and the at least one second boundary part preferably represent rotationally symmetrical or essentially rotationally symmetrical elements.
  • Essentially rotationally symmetrical means that the elements can have cylindrical, conical or curved partial areas.
  • Substantially rotationally symmetric elements may at certain points not rotationally symmetrical additions or sections, such as inflows, reinforcements or flanges exhibit.
  • These rotationally symmetric or substantially rotationally symmetrical elements form the flow channel of the device or the steam turbine. It can also be provided more than two limiting parts, wherein the joints or the cross-sectional joints between the respective boundary parts are shielded according to the invention.
  • the shielding element preferably also has a rotationally symmetrical or substantially rotationally symmetrical profile.
  • a device is preferred in which the line is led to the cavity through one of the limiting parts or through the shielding element.
  • the conduit is preferably formed as a conduit and advantageously connects the cavity to a downstream flow direction, i. downstream in the expansion, lying second pressure chamber.
  • the line in particular the pipeline, partially or completely within and / or outside the boundary parts, that is, the first pressure chamber, are performed.
  • a device or a steam turbine is preferred in which the shielding element and the sealing of the shielding element are designed to be heat-movable. This allows different deformations of the limiting parts or the shield due to the partially prevailing high temperatures and the high pressures are compensated.
  • a device or a steam turbine wherein the shielding attached to at least two circumferential receptacles on the boundary parts, in particular suspended, or that the shielding sealingly seated by at least two heat-resistant seals on the boundary parts or that the shielding at least one circumferential Receiving attached to at least one of the boundary parts, in particular suspended, and is sealingly seated by at least one heat-movable seal on the at least one other boundary part.
  • a circumferential receptacle is provided, to which a first axial region, in particular a first free end of the shielding is sealingly secured, and that a heat-movable seal between the inside of the second boundary parts and a second axial region, in particular of the second free end, of the shielding element is provided.
  • the attachment of the first axial region or of the first free end of the shielding element to the peripheral receptacle can be effected for example by means of screw connections or by insertion into a circumferential groove.
  • the fixing of the shielding advantageously takes place axially and radially to the longitudinal axis of the flow channel at the peripheral receptacle.
  • a sealing element may be provided in this attachment. If the shielding element is seated in a sealing manner with respect to the delimiting parts by means of at least two heat-resistant seals, the shielding element is preferably axially fixed by an axial fixation. This fixation can be done on a boundary part or a circumferential groove. In particular screw connections are particularly suitable.
  • At least one circumferential receptacle is formed by a stator part.
  • the Stator part is sealingly fixed to at least one boundary part.
  • the circumferential receptacle can be formed by an inwardly and / or axially projecting circumferential web. The shape or the configuration of the at least one circumferential receptacle can be varied.
  • the at least one heat-movable seal is sealingly seated on the at least one peripheral receptacle, in particular on the stator part or the surrounding web.
  • the heat-permeable sealing can be formed by a pressure and / or spring force-loadable piston ring, by a labyrinth or transparent seal or by at least one sealing plate.
  • piston ring seals and labyrinth seals are very suitable for use under extreme operating conditions, ie at high pressures and temperatures.
  • Labyrinth or see-through seals can have small games. It is also conceivable that a plurality of seals or sealing plates are provided for the heat-permeable sealing of an axial region, in particular a free end, of the shielding element.
  • At least one of the boundary parts of the device has a groove for receiving the heat-movable seal. This creates a particularly good attachment and sealing of the shielding to the corresponding boundary parts. As a particularly sealing has proven to introduce a piston ring seal in the groove. The seal can be adjusted in the groove.
  • the heat-movable seal is a split seal.
  • a part of the split seal is after lifting the first boundary part in the vicinity of the parting line, in particular the Wienteilfuge, separable, so that thereafter, the remaining part of the shield can be dismantled.
  • So can be provided as a split seal a piston ring seal in two parts and with two joints.
  • Such a split seal can be arranged directly on the shielding element and / or on one of the delimiting parts and / or on at least one peripheral receptacle.
  • a shock forms a separation point on the circumference of the piston ring.
  • the joints have seals and optional entanglements.
  • the line is preferably designed to be flexible and / or at least slidably mounted on the passage to the cavity. This can be avoided that the line breaks when it comes to thermal expansion of individual components. Despite the displaceability or flexibility of the line this is arranged sealed in the implementation of the cavity. If the line is designed as a pipe, this is preferably mounted displaceably, since the pipe is designed to be less flexible than a flexible line from the outset.
  • the shielding element is at least divided into two, wherein the at least two parts of the shielding element are sealingly fastened to one another. It is particularly advantageous if the shielding element is divided axially.
  • the segment of the shielding element, on which the heat-movable seal is arranged is fastened to the second boundary part, and that the second segment is arranged on the first boundary part.
  • the segment with the heat-movable seal after disassembly of the first boundary part and the second segment of the shielding can be excavated together with a rotor of the steam turbine and then disassembled.
  • a piston ring seal is particularly proven.
  • the respective segments of the shielding element can by means of Screw and heat-resistant seals are sealingly fixed together.
  • the shielding element of the device preferably has at least one heating bore. Through a Anicarmbohrung a targeted mass flow of the hot steam flowing in the flow channel can be discharged into the cavity.
  • heat-resistant seals may be used which have certain permeability. Such leaks having seals allow moderate leakage through the seals.
  • a heating line which can be locked by means of a locking element can be led to the cavity.
  • the shielded hot steam can be temporarily supplied to the cavity via the lockable Anürm ein.
  • the warming up line has at least one locking element.
  • This locking element may for example be a slide, a regulator, a tap or a valve. But other types of locking elements are conceivable. If the shielding element heating holes or the seals have certain permeabilities, then a certain amount of superheated steam can be continuously supplied to the cavity.
  • the line to the pressure chamber also has a locking element which can be closed if necessary, to increase the temperature and pressure in the cavity in the short term.
  • the locking element of the conduit can also be designed as a slide, a regulator, a cock, a valve, etc.
  • the locking element in the conduit to the second pressure chamber allows a temporary damming of the pressure and also the temperature in the cavity and the line connection to the, usually downstream, second pressure chamber. After reaching a desired temperature level in the cavity and / or in the flange portions of the parting line, in particular the funnelteilfuge, or in the relevant for the unsteady operation sections of the delimiting the line to the second pressure chamber is fully opened again, so that for the stationary Operation again a lowered pressure in the cavity and thus adjusts the parting line. Through the opening of the line and the temperature level in the cavity or in the line is again adjustable.
  • a device is preferred in which at least one cooling steam line, which can be locked by means of a locking element, is guided to the hollow space via which cooling steam can be fed into the hollow space. That is, in addition to the above-mentioned improvements in terms of the pressure at the parting line or the cross-sectional joint and the axial force and the possible moderate temperature reduction by throttling can, if necessary, a further stationary temperature reduction at the parting line or the vertical parting of the cross-sectional joint can be achieved. This is necessary, for example, if admissible operating temperatures of limiting parts, of the shielding element or of screw materials are complied with or if a lowering of the component temperatures requires an increase in the strength characteristics.
  • cooling steam is advantageously passed from a first, downstream with respect to the parting line, passage through the cooling steam line in the cavity between the shield and the parting line and returned through the line to a second, further downstream point.
  • the pressure in the cavity may be due to the special piping design, in particular Pipe design, and any damming in the line, also referred to as discharge line, are set, in the limits of the pressure levels of the first and the second digit.
  • This solution is technically sophisticated and requires a more massive design of the shield, ie the shielding.
  • the additional benefit of the described measures for lowering the temperature can then be checked case by case.
  • the Anürm technisch, the cooling steam line and the discharge line have corresponding locking elements, by which a regulation of the pressure level is made possible.
  • the locking elements may be, for example, a slide, a regulator, a tap or a valve. But other locking elements are conceivable. Furthermore, instead of or in addition to the locking elements, flow resistances, such as orifices, throttles, etc., can be used for the regulation of the pressure level within the lines, ie the line, the heating line and / or the cooling steam line.
  • a suction device can be sucked through the leakage quantities.
  • a sealing seam is welded to the side of the parting line facing the first pressure chamber, in particular the vertical cross-part joint. It is important to ensure the safe and sufficiently heat-mobile design of the weld, so that damage is avoided even in transient processes.
  • the object is achieved by a method for lowering the pressure acting on a parting line, which is formed by the joining together of at least one first delimiting part and at least one second delimiting part of a device, in particular a steam turbine, and for reducing the pressure acting on the part Dividing joint acting fastening forces, wherein the boundary parts at least enclosing a part of a first pressure chamber, a shielding element being provided sealingly opposite the at least one first boundary part and the at least one second boundary part at the sides of the boundary parts facing the flow channel interior, thereby completely covering the parting line, so that between the boundary parts and the shielding a cavity is formed, and wherein from a second pressure chamber, a conduit is guided into the cavity, via which the pressure in the cavity is lowered to a lower level, dissolved.
  • the tight cover of the parting line on the inside of the boundary parts by a shielding creates a cavity.
  • a conduit is guided, which is connected to a lying outside the cavity second pressure chamber.
  • other operating conditions in particular other temperatures and pressures, can be set in the cavity than in the first pressure chamber.
  • the burden on the parting line, in particular on the cross-part joint reduced. It has been proven that a reduction of the pressure by 15 to 20 bar is possible.
  • the application of the parting line, in particular the cross-sectional joint is significantly increased in steam turbines and other devices. That is, the application of a joint connection, in particular a cross-part joint connection is extended.
  • the pressure reduction in the region of the parting line or cross-parting joint is made possible by a reliable heat-resistant shielding.
  • Due to the pressure reduction in the region of the parting line or cross-part joint a reduction of the effective internal pressure-related axial forces by about 1/3 compared to the known devices in which no pressure reduction takes place, possible.
  • Particularly preferred is a method in which the pressure acting on the parting line and the fastening forces acting on the parting line are lowered or reduced by a device, in particular a steam turbine, according to the first aspect of the invention.
  • the Fig. 1 to 5 show schematically different connection possibilities of two limiting elements 1, 2 of a steam turbine.
  • the shielding element 5 completely covers the parting line 3, so that a sealed cavity 6 is formed between the two inner sides of the delimiting elements 1, 2, the parting line 3 and the shielding element 5.
  • the shielding element 5 protects the parting line in front of the prevailing in the flow channel or in the first pressure chamber, which is at least partially formed by the two limiting elements 1, 2, prevailing conditions.
  • the shielding element 5 is sealingly attached to the boundary elements 1, 2 around the region of the parting line 3 or the cross-sectional joint.
  • the boundary elements 1, 2 are formed as rotationally symmetric or substantially rotationally symmetrical elements or sub-elements.
  • the shielding element 5 is sealingly attached to an axial region, in this case at a free end, on a circumferential receptacle 9 arranged on the first boundary part 1.
  • the circumferential receptacle 9 may also be a stator of the steam turbine or a circumferential, inwardly projecting web.
  • the shielding element 5 can be suspended from the circulated receptacle 9 at least slightly movably.
  • a second axial region, in particular the second free end, of the shielding element 5 is arranged sealed on the inside of the second boundary part 2.
  • This heat-resistant seal 10 may be, for example, a pressure and / or spring-loaded piston ring seal or labyrinth seal.
  • the shielding element 5 has a passage in which a line 7 rests sealed.
  • the conduit 7 connects the cavity 6 with a second, not shown, pressure chamber arranged outside the shielding element 5.
  • the line 7 is preferably at least partially flexibly formed and / or is slidably mounted in the passage to the cavity 6.
  • the line 7 is preferably designed as a pipeline.
  • the conduit 7 is arranged sealed by a sealing element 16.
  • the conduit 7 is further downstream of a vane support 15, which is arranged on the circumferential receptacle 9 a, attached.
  • the second pressure space may be provided downstream of the vane support, for example.
  • the line 7 preferably has a locking element 13, in particular in the form of a valve. About this locking element 13, the conditions, in particular the pressure and the temperature within the cavity 6 can be controlled.
  • the shielding element 5 has a Anicarmbohrung 12 through which a defined amount of superheated steam can be continuously supplied to the cavity 6. This serves to improve the transient behavior of the shielded parting line or cross-parting joint.
  • a temporary increase in the heat transfer coefficient of the cavity 6 surrounding components is possible.
  • the locking element 13 and thus the line 7 can be fully opened again, so that the pressure in the cavity 6 lowers again for stationary operation of the steam turbine.
  • the two boundary parts 1, 2 have flange connections, are guided by the fastening screws 14.
  • the heat-movable seal 10 has a certain permeability, can flow through the continuously a defined amount of superheated steam in the cavity 6.
  • the risk of leakage at the parting line 3 is reduced.
  • boundary parts 1, 2 are provided, these are connected to one another at a parting line 3.
  • Three boundary parts form a Stoßteilfuge and four boundary parts form a Wienteilfuge.
  • Fig. 2 shows a further embodiment of the sealing of a parting line 3 and a funnelteilfuge between at least two boundary parts 1, 2 of a steam turbine.
  • the heat-movable seal 10 is designed in two parts.
  • the two-part seal 11 has advantages when mounting or dismounting the shielding element 5 on the at least one second boundary part 2.
  • the split seal 11 is a piston ring seal in two parts and with two joints.
  • the second pressure chamber is also in this and in the Fig. 3-5 not shown embodiments shown.
  • the second pressure chamber is formed by the interior of the at least one first boundary part 1 and sealed lead carrier used.
  • the second pressure chamber in addition to the arrangement in the flow channel, can also be arranged outside the flow channel, ie outside the boundary parts 1, 2.
  • the flange 8 of the shielding element 5 serves to close the parting line of the at least two-part shielding element 5.
  • the in the Fig. 3 shown variant of the sealing of a parting line 3 and a funnelteilfuge between at least two boundary parts 1, 2 of a steam turbine, has a different leadership of the line 7 between the cavity 6 and a second pressure chamber.
  • the passage to the cavity 6 is not provided in the shielding member 5 but in the first restriction member 1.
  • the line 7 is outside the flow channel, ie outside the first boundary part 1, out and is first performed in a downstream region in the flow channel interior 4 and connected there to the second pressure chamber, not shown.
  • the conduit 7 is sealingly secured in the passage to the cavity 6 in the at least one first boundary part 1 by sealing elements.
  • the shielding element 5 is divided in this embodiment into two segments 5a, 5b. In this case, the shielding element 5 is divided axially.
  • the heat-movable seal 10 here in the form of a split seal 11, respectively.
  • the second shielding element segment 5b is fixed to the circumferential receptacle 9 on the inside of the at least one first limiting part 1.
  • the split seal 11 allows the first shield member segment 5a with the split seal 11, after disassembly of the first restriction member 1 and the second shield member segment 5b, to be excavated together with the rotor of the steam turbine provided in the flow passage interior 4 and disassembled accordingly.
  • a split seal 11 is a piston ring seal.
  • the line is preferably mounted slidably in the passages or formed flexible at least one point.
  • the Ablelementsegmente 5a, 5b each have a flange 8a, 8b, through which the at least two divided Ablelementsegmente 5a, 5b together and possibly on at least one of the boundary members 1, 2 and / or at least one circumferential groove 9, for example, a stator axially can be fixed.
  • Fig. 4 shows a further possible embodiment variant of the sealing of a parting line 3 and a funnelteilfuge between at least two boundary parts 1, 2 of a steam turbine.
  • a Anürmtechnisch 17 is guided from the flow channel interior 4 in the cavity 6 in this embodiment.
  • the Anürmtechnisch 17 is not performed by the shielding 5, but by the at least one second boundary part 2 sealingly.
  • the Anürmtechnisch 17 hot steam from the flow channel interior 4 and from the first pressure chamber into the cavity 6 to achieve a temporary pressure increase and an increase in the temperature in the cavity 6.
  • a conduit 7 is provided, which is guided partly outside the flow channel. With an opening of the locking element 18 of the Anürmtechnisch 17 and a simultaneous closure of the locking element 13 of the line 7, the pressure and the temperature in the cavity 6 can be temporarily increased.
  • cooling steam from a first downstream point through a further cooling steam line 19 into the cavity 6 between the shielding 5, the parting line 2 and the boundary parts 1, 2 are passed.
  • the line 7 which ends at a second, more downstream point in the flow channel, in particular in a third pressure chamber, the supplied cooling steam can be removed again.
  • the pressure in the cavity 6 can be adjusted by the specific design of the cooling steam line 19 and the line 7 and a damming in the line 7, in the limits of the pressure levels of the first and the second location.
  • this solution is technically demanding and requires a more solid design of the shielding 5.

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

Claims (20)

  1. Dispositif présentant au moins un premier élément de limitation (1) et au moins un deuxième élément de limitation (2), les éléments de limitation (1, 2) pouvant être fixés l'un à l'autre en formant un joint de séparation (3) et entourant alors au moins une partie d'une première chambre de pression, sur les côtés tournés vers la première chambre de pression des éléments de limitation (1, 2) étant prévu un élément formant écran (5), agencé de manière étanche par rapport audit au moins un premier élément de limitation (1) et audit au moins un deuxième élément de limitation (2) et recouvrant totalement le joint de séparation (3), de telle sorte qu'une cavité (6) est formée entre les éléments de limitation (1, 2) et l'élément formant écran (5), et qu'une conduite (7) est menée dans la cavité (6), faisant communiquer la cavité (6) avec une deuxième chambre de pression,
    caractérisé en ce que
    l'élément formant écran (5) présente au moins un alésage de préchauffage (12), en ce que les joints d'étanchéité mobiles sous l'effet de la chaleur (10) présentent des porosités et/ou en ce qu'au moins une conduite de préchauffage (17), verrouillable au moyen d'un élément de verrouillage, mène à la cavité (6), conduite via laquelle de la vapeur chaude peut être envoyée dans la cavité (6), et en ce que la conduite (7) entre la deuxième chambre de pression et la cavité (6) est verrouillable par un élément de verrouillage (13).
  2. Dispositif selon la revendication 1, caractérisé en ce que le joint de séparation (3) est un joint d'about ou un joint en croix.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les éléments de limitation (1, 2) sont des éléments à symétrie de révolution ou sensiblement à symétrie de révolution.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la conduite (7) menant à la cavité (6) passe à travers un des éléments de limitation (1, 2) ou à travers l'élément formant écran (5).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'élément formant écran (5) et le joint d'étanchéité de l'élément formant écran (5) sont mobiles sous l'effet de la chaleur.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'élément formant écran (5) est fixé, en particulier suspendu aux éléments de limitation (1, 2) au niveau d'au moins deux logements périphériques (9), ou en ce que l'élément formant écran (5) est monté de façon étanche sur les éléments de limitation (1, 2) par au moins deux joints d'étanchéité mobiles sous l'effet de la chaleur (10), ou en ce que l'élément formant écran (5) est fixé, en particulier suspendu à au moins un des éléments de limitation (1, 2) au niveau d'au moins un logement périphérique (9) et monté de façon étanche sur le au moins un autre élément de limitation (1, 2) par au moins un joint d'étanchéité mobile sous l'effet de la chaleur (10).
  7. Dispositif selon la revendication 6, caractérisé en ce que ledit au moins un logement périphérique (9) est formé par un élément stator.
  8. Dispositif selon l'une des revendications 6 à 7, caractérisé en ce que ledit au moins un joint d'étanchéité mobile sous l'effet de la chaleur (10) est monté de manière étanche sur ledit au moins un logement périphérique (9).
  9. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que ledit au moins un joint d'étanchéité mobile sous l'effet de la chaleur (10) est formé par un segment de piston sollicitable par une force de pression et/ou de ressort, par un joint d'étanchéité à labyrinthe resp. joint à regard (Durchblickdichtung) ou par au moins une tôle d'étanchéité.
  10. Dispositif selon l'une des revendications 6 à 9, caractérisé en ce qu'au moins un des éléments de limitation (1, 2) présente une rainure pour la réception du joint d'étanchéité mobile sous l'effet de la chaleur (10).
  11. Dispositif selon l'une des revendications 6 à 10, caractérisé en ce que le joint d'étanchéité mobile sous l'effet de la chaleur (10) est un joint d'étanchéité divisé (11).
  12. Dispositif selon la revendication 11, caractérisé en ce que ledit joint d'étanchéité divisé (11) est disposé sur l'élément formant écran (5) et/ou sur un des éléments de limitation (1, 2) et/ou sur au moins un logement périphérique (9).
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé en ce que la conduite (7) est flexible et/ou est montée de manière mobile en translation au moins au passage menant à la cavité (6).
  14. Dispositif selon l'une des revendications 1 à 13, caractérisé en ce que l'élément formant écran (5) est au moins divisé en deux, les au moins deux parties (5a, 5b) de l'élément formant écran (5) étant fixées l'une à l'autre de manière étanche.
  15. Dispositif selon l'une des revendications 1 à 14, caractérisé en ce qu'au moins une conduite de vapeur de refroidissement (19), verrouillable au moyen d'un élément de verrouillage (20), mène à la cavité (6), conduite via laquelle de la vapeur de refroidissement peut être envoyée dans la cavité (6).
  16. Dispositif selon l'une des revendications 1 à 15, caractérisé en ce que sur les côtés détournés de la première chambre de pression des éléments de limitation (1, 2), au-dessus du joint de séparation (3), est prévu un dispositif d'aspiration pour aspirer des fuites.
  17. Dispositif selon l'une des revendications 1 à 16, caractérisé en ce que des résistances à l'écoulement sont prévues, permettant le réglage du niveau de pression à l'intérieur de la conduite (7), de la conduite de préchauffage (17) et/ou de la conduite de vapeur de refroidissement (19).
  18. Dispositif selon l'une des revendications 1 à 17, caractérisé en ce qu'un cordon d'étanchéité est soudé sur le côté tourné vers la première chambre de pression du joint de séparation vertical (3).
  19. Procédé pour abaisser la pression agissant sur un joint de séparation (3) formé par l'assemblage d'au moins un premier élément de limitation (1) et d'au moins un deuxième élément de limitation (2) d'un dispositif et pour réduire les forces de fixation agissant sur le joint de séparation (3), les éléments de limitation (1, 2) entourant au moins une partie d'une première chambre de pression, sur les côtés tournés vers la première chambre de pression desdits éléments de limitation (1, 2) étant prévu un élément formant écran (5), agencé de manière étanche par rapport audit au moins un premier élément de limitation (1) et audit au moins un deuxième élément de limitation (2) et recouvrant totalement le joint de séparation (3), de telle sorte qu'une cavité (6) est formée entre les éléments de limitation (1, 2) et l'élément formant écran (5), qu'une conduite (7) est menée dans la cavité (6) depuis une deuxième chambre de pression, conduite par laquelle la pression dans la cavité (6) est abaissée à un niveau inférieur,
    caractérisé en ce que
    l'élément formant écran (5) est prévu avec au moins un alésage de préchauffage (12) grâce auquel les joints mobiles sous l'effet de la chaleur (10) présentent des porosités, et/ou en ce qu'au moins une conduite de préchauffage (17), verrouillable au moyen d'un élément de verrouillage (18), est menée à la cavité (6), conduite via laquelle de la vapeur chaude est envoyée dans la cavité (6), et en ce que la conduite (7) entre la deuxième chambre de pression et la cavité (6) est verrouillée par un élément de verrouillage (13).
  20. Procédé selon la revendication 19, caractérisé en ce que la pression agissant sur le joint de séparation (3) et les forces de fixation agissant au niveau du joint de séparation (3) sont abaissées par un dispositif, en particulier une turbine à vapeur, selon l'une des revendications 1 à 19.
EP09166731.1A 2008-09-03 2009-07-29 Dispositif et procédé de réduction de la pression sur un joint de séparation entre au moins deux éléments de limitation Not-in-force EP2161415B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008045657.8A DE102008045657B4 (de) 2008-09-03 2008-09-03 Vorrichtung und Verfahren zur Reduzierung des Drucks auf eine Trennfuge zwischen wenigstens zwei Begrenzungsteilen

Publications (3)

Publication Number Publication Date
EP2161415A2 EP2161415A2 (fr) 2010-03-10
EP2161415A3 EP2161415A3 (fr) 2014-08-13
EP2161415B1 true EP2161415B1 (fr) 2016-07-27

Family

ID=41349510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09166731.1A Not-in-force EP2161415B1 (fr) 2008-09-03 2009-07-29 Dispositif et procédé de réduction de la pression sur un joint de séparation entre au moins deux éléments de limitation

Country Status (4)

Country Link
US (1) US8419357B2 (fr)
EP (1) EP2161415B1 (fr)
DE (1) DE102008045657B4 (fr)
PL (1) PL2161415T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016215795A1 (de) 2016-08-23 2018-03-01 Siemens Aktiengesellschaft Dampfturbine mit Strömungsabschirmung
DE102017203210A1 (de) 2017-02-28 2018-08-30 Siemens Aktiengesellschaft Turbinengehäuse und Verfahren zur Montage eines Turbinengehäuses
JP6971924B2 (ja) * 2018-07-06 2021-11-24 三菱重工コンプレッサ株式会社 持ち上げ治具、蒸気タービンの分解方法、蒸気タービンの部品交換方法、及び蒸気タービンの製造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB510505A (en) * 1938-01-27 1939-08-02 British Thomson Houston Co Ltd Improvements in casings for elastic fluid turbines
DE853451C (de) * 1950-05-28 1952-10-23 Brown Flanschverbindung an Druckgefaessen, insbesondere an Gehaeusen von Dampf- und Gasturbinen
JPS5537681Y2 (fr) 1976-12-27 1980-09-04
US4296538A (en) * 1978-05-24 1981-10-27 Carrier Corporation Method of providing a sealing assembly between a steam chest and turbine casing
GB2111607B (en) * 1981-12-08 1985-09-18 Rolls Royce Bearing chamber pressurisation system for a machine
JP3898232B2 (ja) * 1997-06-25 2007-03-28 シーメンス アクチエンゲゼルシヤフト 部分配管の継手装置
JPH11229817A (ja) * 1998-02-09 1999-08-24 Hitachi Ltd 蒸気タービンの主蒸気管冷却装置及び蒸気タービン発電プラント
GB2393766A (en) * 2002-10-03 2004-04-07 Alstom A sealing arrangement for a turbine
EP1744017A1 (fr) * 2005-07-14 2007-01-17 Siemens Aktiengesellschaft Turbine combinée à vapeur et procédé de fonctionnement d'une turbine combinée à vapeur

Also Published As

Publication number Publication date
PL2161415T3 (pl) 2017-01-31
DE102008045657B4 (de) 2014-11-06
EP2161415A3 (fr) 2014-08-13
US20100054925A1 (en) 2010-03-04
EP2161415A2 (fr) 2010-03-10
US8419357B2 (en) 2013-04-16
DE102008045657A1 (de) 2010-03-11

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