EP2910741A1 - Tige de poussée chauffante pour une turbine à vapeur - Google Patents

Tige de poussée chauffante pour une turbine à vapeur Download PDF

Info

Publication number
EP2910741A1
EP2910741A1 EP14156366.8A EP14156366A EP2910741A1 EP 2910741 A1 EP2910741 A1 EP 2910741A1 EP 14156366 A EP14156366 A EP 14156366A EP 2910741 A1 EP2910741 A1 EP 2910741A1
Authority
EP
European Patent Office
Prior art keywords
housing
rotor
steam
turbine
push rod
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Withdrawn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
EP14156366.8A
Other languages
German (de)
English (en)
Inventor
David Barkowski
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
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP14156366.8A priority Critical patent/EP2910741A1/fr
Priority to CN201580010261.4A priority patent/CN106030048B/zh
Priority to PCT/EP2015/050630 priority patent/WO2015124333A1/fr
Publication of EP2910741A1 publication Critical patent/EP2910741A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • 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
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/502—Thermal properties
    • F05D2300/5021—Expansivity

Definitions

  • the invention relates to an arrangement comprising a first sub-turbine having a first rotor and a first housing, a second sub-turbine having a second rotor and a second housing, and a push rod connecting the first housing to the second housing.
  • the invention relates to a method for operating a steam turbine, wherein the steam turbine comprises at least two sub-turbines, wherein in each case a sub-turbine has a housing and a rotor and the housing are coupled to each other via push rods.
  • Steam turbines usually have several sub-turbines and are designed for steam parameters that have up to 630 ° C at a pressure of 350 bar. Such high steam parameters pose a challenge to the entire steam turbine. Thermal expansion effects cause games to be scaled up or down between the housing and the rotor.
  • the shaft train of a steam turbine can thermally expand more during operation than the housing. Due to the need to allow such an axial offset and the partial conical shape of the housing results in higher gap losses. Therefore, the housing parts are coupled together by means of push rods. This means that the rigid coupling with the push rods, a movement of a housing leads to a movement of the adjacent housing, which are interconnected via the push rod. According to the prior art, the push rods maintain their length, so that the rotor continues to experience an axial offset relative to the housing due to its higher temperature.
  • Hydraulic systems could adapt the axial offset of the housings to the position of the shafts.
  • an actively controlled system has the disadvantage that damage to the steam turbine would be expected in the event of a failure of the system, since the game reserve is reduced to reduce the gap.
  • the object of the invention is therefore to increase the steam turbine efficiency.
  • This object is achieved by an arrangement comprising a first turbine part with a first rotor and a first housing, a second turbine part with a second rotor and a second housing and a push rod, which connects the first housing with the second housing with each other, wherein the push rod hollow is executed.
  • the object is achieved by a method for operating a steam turbine, wherein the steam turbine comprises at least two sub-turbines, wherein each sub-turbine each having a housing and a rotor, wherein the housing via push rods are coupled together and the push rods are made hollow, wherein the cavity heating steam for thermal expansion of the push rod flows.
  • the invention pursues the way to heat the push rod, thereby allowing thermal expansion of the push rod. With the linear expansion of the push rod you gain another parameter to position the housing and rotor parts optimally to each other.
  • An essential idea of the invention is to use the hollow push rod with to apply a heating steam. This heating steam could be taken from the steam turbine at a suitable location.
  • the heating of the push rod according to the invention is not unregulated, but depending on the position of the rotor.
  • the Schudampfzu- or outflow should be positioned so that it is obstructed by the rotor, when the housing displacement corresponds approximately to the rotor displacement.
  • the arrangement is formed with a supply steam channel and a supply source, which is designed to supply heating steam in the supply steam channel, wherein the cavity of the push rod is fluidically connected via the supply steam channel with the supply steam source.
  • the supply steam source could, for example, be a steam from the process, such as the exhaust steam of a partial turbine. This steam is conducted via a supply steam channel into the cavity of the push rod and thus leads to a thermal expansion.
  • the supply steam duct is arranged in the first and / or in the second housing.
  • the supply steam channel has a heating steam outlet, wherein the heating steam outlet can be closed and opened with the first or second rotor.
  • the supply steam channel may be considered in a first approximation as a bore with a heating steam outlet.
  • this Schudampfauslass is covered by the rotor.
  • the rotor may expand and thereby expose the bore, resulting in that the heating steam outlet is opened and thus a supply of the cavity of the push rod can be done with heating steam from the supply steam channel.
  • the expansion of the push rod inevitably causes movement of the housing, which can be exploited to close the bore or the heating steam outlet again by means of a cover with the rotor.
  • the FIG. 1 shows in a cross-sectional view of a steam turbine 1.
  • the steam turbine includes a first turbine part 2a, a second turbine part 2b, a third turbine part 2c and a fourth turbine part 2d.
  • the first sub-turbine 2 a is designed as a high-pressure turbine part and has a high-pressure steam inlet 3 and a high-pressure steam outlet 4.
  • a live steam flows from the high pressure steam inlet 3 through a blading 5 to the high pressure steam outlet 4 the steam has flowed through the high-pressure turbine section, it is heated in a reheater (not shown) and fed to a medium-pressure steam inlet 6 of the second turbine section 2b, which is designed as a medium-pressure turbine section.
  • the medium-pressure turbine section is double-flow.
  • the steam flows via the medium-pressure steam inlet 6 through a medium-pressure blading 7 to a medium-pressure steam outlet 8. From there, the steam flows via an overflow line, not shown, to a low-pressure steam inlet 9 of the part turbines 2c and 2d designed as low-pressure turbine part. From there, the steam flows via respective low-pressure blading 10 to a low-pressure steam outlet 11 and from there to a capacitor, not shown.
  • the second sub-turbine 2b comprises a rotor 12.
  • Both the sub-turbine 2a and the sub-turbines 2c and 2d each include a rotor 13, wherein the rotors 12, 13 are coupled together by means of rigid couplings 14.
  • a housing 15 is arranged to the rotor 12.
  • the housing 15 is a first housing 15, the rotor 12 is a first rotor 12.
  • the low-pressure part turbine 2 c comprises the rotor 13 (second rotor 13) and a second housing 16.
  • the rotor 12, 13 expands, which can lead to an enlarged gap between the rotor 12, 13 and the housing 15.
  • a push rod 17 is arranged between the first housing 15 and the second housing 16.
  • the rotor 12, 13 In operation, the rotor 12, 13 usually rotates at 50 and 60 Hz and drives an electric generator 18, which in the FIG. 1 is shown only symbolically.
  • the push rod 17 is hollow and thereby has a cavity in the FIG. 1 is not shown in detail.
  • the FIG. 2 shows a side view of a part of the steam turbine 1 from FIG. 1 ,
  • the first rotor 13 rotates about a rotation axis 19 and is arranged opposite to the first housing 15.
  • the rotor 13 has a first radius R1 and a second radius R2, where R1> R2.
  • the transition from the Radius R1 to radius R2 is essentially discontinuous and shows an edge 20 in the region of the transition.
  • the first housing 15 has a supply steam channel 21, which in the in FIG. 2 shown operating state of the first rotor 13 is initially obscured.
  • the supply steam channel 21 has a heating steam outlet 22, which is completely covered by the edge 20, so that no heating steam can flow.
  • the heating steam can be removed, for example, from the process and could for example be the exhaust steam of the turbine part 2b.
  • the rotor 13 has an annular end face 27.
  • FIG. 3 shows one compared to FIG. 2 shown state a state during operation in a transient state.
  • the difference to FIG. 2 lies in the fact that the rotor 13 thermally expands by applying process steam and indeed by the amount .DELTA.X shaft 23.
  • the extent is such that the edge 20 now releases the Schudampfauslass 22 so that a heating steam from the supply steam channel 21 can flow out ,
  • the state is off FIG. 2 shown by a dashed line 24.
  • the heating steam flowing out of the supply steam duct 21 is fed to the push rod 17 and can be guided there into the cavity. As a result, the push rod 17 expands, with the result that the housing 15, 16 can be moved.
  • FIG. 4 is exemplified how the movement of the housing 15 is carried out.
  • the housing 15 is followed by the amount .DELTA.X housing 25 of the movement of the shaft.
  • the condition of the housing is off FIG. 3 represented as a second dashed line 26 symbolically.
  • the movement of the housing 15 over the thermally extended push rod 17 is in the in FIG. 4 shown state such that substantially the amount 23 is equal to the amount 25.
  • .DELTA.X housing is approximately equal to .DELTA.X shaft .
  • FIG. 4 can be seen, thereby the Schudampfauslass 22 closed again by the rotor 13 and the housing 15.
  • no heating steam flows to the push rod 17 and the movement of the housing 15 is again avoided.
  • FIG. 5 shows a further embodiment of the in the FIGS. 2, 3 and 4 shown section of the steam turbine 1.
  • the difference of in FIG. 5 shown arrangement to the FIGS. 2, 3 and 4 is that the housing 15 is conical in the region of the edge 20 of the rotor 13, so that the rotor must also be made conical at the edge, so that a rubbing of the rotor 13 is avoided on the housing 15.
  • the FIG. 5 merely shows an operating state in which the Schudampfauslass 22 is completely covered with the rotor 13, so that no heating steam can flow out of the supply steam passage 21.
  • the supply steam channel 21 is connected to a supply steam source.
  • the supply steam source is not shown in detail.
  • the supply steam source can be, for example, an available process steam or, for example, an exhaust steam of a partial turbine.
  • the transition at the edge 20 of the rotor 13 from the radius R1 to the radius R2 is discontinuous, so that an end face 27 is formed, which is substantially parallel to the radius R1 or R2.
  • This end face 27 does not necessarily have to be parallel to the radius R1 or R2, but may be inclined at an angle, not shown, to the radius R1 or R2. It is important that the edge 20 can completely close the heating steam outlet 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP14156366.8A 2014-02-24 2014-02-24 Tige de poussée chauffante pour une turbine à vapeur Withdrawn EP2910741A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14156366.8A EP2910741A1 (fr) 2014-02-24 2014-02-24 Tige de poussée chauffante pour une turbine à vapeur
CN201580010261.4A CN106030048B (zh) 2014-02-24 2015-01-15 用于蒸汽轮机的可加热的推杆
PCT/EP2015/050630 WO2015124333A1 (fr) 2014-02-24 2015-01-15 Barre de poussée pouvant être chauffée pour turbine à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14156366.8A EP2910741A1 (fr) 2014-02-24 2014-02-24 Tige de poussée chauffante pour une turbine à vapeur

Publications (1)

Publication Number Publication Date
EP2910741A1 true EP2910741A1 (fr) 2015-08-26

Family

ID=50190213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14156366.8A Withdrawn EP2910741A1 (fr) 2014-02-24 2014-02-24 Tige de poussée chauffante pour une turbine à vapeur

Country Status (3)

Country Link
EP (1) EP2910741A1 (fr)
CN (1) CN106030048B (fr)
WO (1) WO2015124333A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216322B (de) * 1962-05-30 1966-05-12 Creusot Forges Ateliers Dampf- oder Gasturbine mit mehreren, koaxial hintereinander angeordneten Teilturbinen
GB1145612A (en) * 1966-04-12 1969-03-19 Licentia Gmbh Improvements relating to steam turbines
US6092986A (en) * 1996-07-24 2000-07-25 Siemens Aktiengesellschaft Turbine plant having a thrust element, and thrust element
EP2554801A1 (fr) 2011-08-02 2013-02-06 Siemens Aktiengesellschaft Système de turbine comprenant un agencement de tige de poussée entre deux carters

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB995473A (en) * 1962-05-30 1965-06-16 Rateau Soc Turbine with double-casing low-pressure cylinder
DE19629933C1 (de) * 1996-07-24 1997-09-04 Siemens Ag Turbinenanlage mit Schubelement sowie Schubelement
US20100054911A1 (en) * 2008-08-29 2010-03-04 General Electric Company System and method for adjusting clearance in a gas turbine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216322B (de) * 1962-05-30 1966-05-12 Creusot Forges Ateliers Dampf- oder Gasturbine mit mehreren, koaxial hintereinander angeordneten Teilturbinen
GB1145612A (en) * 1966-04-12 1969-03-19 Licentia Gmbh Improvements relating to steam turbines
US6092986A (en) * 1996-07-24 2000-07-25 Siemens Aktiengesellschaft Turbine plant having a thrust element, and thrust element
EP2554801A1 (fr) 2011-08-02 2013-02-06 Siemens Aktiengesellschaft Système de turbine comprenant un agencement de tige de poussée entre deux carters

Also Published As

Publication number Publication date
CN106030048B (zh) 2018-09-07
CN106030048A (zh) 2016-10-12
WO2015124333A1 (fr) 2015-08-27

Similar Documents

Publication Publication Date Title
EP1774140B1 (fr) Turbine a vapeur et procede pour faire fonctionner une turbine a vapeur
EP1452688A1 (fr) Rotor pour une turbine à vapeur, procédé et utilisation de refroidissement d'un tel rotor
DE102009026053A1 (de) Überlastventil für eine Dampfturbine und zugehöriges Verfahren
EP0929736A1 (fr) Turbine a vapeur et procede pour le refroidissement d'une turbine a vapeur fonctionnant en mode ventilation
EP1998014A2 (fr) Procédé destiné au fonctionnement d'une turbine à vapeur multiple
WO2014033220A1 (fr) Procédé de refroidissement permettant de faire fonctionner une turbine à gaz
DE3047008A1 (de) "dampfstroemungsvorrichtung fuer eine dampfturbine mit zwischenueberhitzung und verfahren zum betreiben derselben"
EP2644840A1 (fr) Système de turbines à vapeur et procédé de démarrage d'une turbine à vapeur
EP2067933B1 (fr) Concept de sécurité pour une turbine à vapeur
DE102011014120A1 (de) Vorrichtung zum Einbringen eines Gasstroms
DE102010009130A1 (de) Dampfkraftwerk umfassend eine Tuning-Turbine
EP1445427A1 (fr) Turbine à vapeur et procédé d'opération d'une turbine à vapeur
EP2910741A1 (fr) Tige de poussée chauffante pour une turbine à vapeur
DE102015118280A1 (de) Wasserzufuhrsystem für einen Gasturbinenverdichter
DE602005003913T2 (de) Kombikraftwerk mit Dampfturbinen- und Gasturbinengruppen
DE102010035393A1 (de) Turbine und Verfahren zum Betrieb einer Turbine für ein CAES-System
EP3087256A2 (fr) Procédé de refroidissement d'une turbine à vapeur
DE69913688T2 (de) Konzept einer gasturbine
EP1953351A1 (fr) Concept de préchauffage et de démarrage de turbines à vapeur avec des températures d'entrée supérieures à 650°C
EP3591215A1 (fr) Système de collecte d'énergie à l'aide d'une turbine à eau
EP1598522B1 (fr) Composants d'une turbine à vapeur, procédé pour refroidir une turbine à vapeur et leur utilisation
EP2886806A1 (fr) Turbomachine
EP3111059B1 (fr) Circuit de vapeur d'eau et procédé de fonctionnement d'un circuit de vapeur d'eau
EP3850194B1 (fr) Turbine à vapeur et procédé permettant de faire fonctionner celle-ci
EP3183426A1 (fr) Refroidissement contrôlé d'arbre de turbine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160227