WO2004003346A1 - Steam turbine - Google Patents
Steam turbine Download PDFInfo
- Publication number
- WO2004003346A1 WO2004003346A1 PCT/CH2003/000426 CH0300426W WO2004003346A1 WO 2004003346 A1 WO2004003346 A1 WO 2004003346A1 CH 0300426 W CH0300426 W CH 0300426W WO 2004003346 A1 WO2004003346 A1 WO 2004003346A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steam
- rotor
- protective shields
- inner housing
- steam turbine
- Prior art date
Links
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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/08—Heating, heat-insulating or cooling means
- F01D5/081—Cooling fluid being directed on the side of the rotor disc or at the roots of the blades
- F01D5/084—Cooling fluid being directed on the side of the rotor disc or at the roots of the blades the fluid circulating at the periphery of a multistage rotor, e.g. of drum type
Definitions
- the present invention relates to the field of steam turbines. It relates to a steam turbine according to the preamble of claim 1.
- a medium-pressure steam turbine in which cooling steam is removed from the outlet of the high-pressure turbine before reheating and guided from an annular space outside the steam duct via axial bores in the rotor into the first two stages of the turbine and is fed into the steam duct from the blade feet.
- Such a solution can only be used with high-pressure turbines, but not with medium-pressure turbines.
- the object is achieved by the entirety of the features of claim 1.
- the essence of the invention is to arrange, at least in the steam channel parallel and close to the surface of the rotor and / or parallel and close to the inner surface of the inner housing, plate-shaped protective shields which protect the underlying surface of the rotor or inner housing from the direct action of the flowing through the steam channel Protect hot steam.
- a first preferred embodiment is characterized in that the protective shields, as passive protective shields, rest directly on the surface of the rotor or the inner housing to be protected or are separated from the surface to be protected only by a gap. They are not actively cooled, but act because the hot steam of the steam duct no longer flows past at high speed and are therefore called "passive" protective shields or plates here.
- the high speed is caused by the rotor rotation and the steam flow relative to the inner housing and causes the heat transfer from the hot steam to the component surface to be increased.
- the fact that the hot steam temperature still acts due to the protective shields, but there is no longer any relative speed between the steam and the component surface, significantly reduces the heat transfer.
- the protective shields can be formed (on the rotor side) as part of the rotor blades attached to the rotor.
- a second preferred embodiment of the invention is characterized in that the protective shields are arranged at a distance from the surface of the rotor or the inner housing to be protected, and the steam turbine is designed in such a way that cooling steam flows through the intermediate space.
- First protective shields are preferably arranged in the front stages of the steam channel in the direction of flow, and the cooling steam is removed from the steam channel in one of the stages located further downstream and returned through the intermediate space counter to the direction of flow. Heated steam is therefore used, which is only removed from the steam duct when it has already covered a pressure drop. As a result, the steam is colder than the steam in the inflow. This cooler steam is now diverted and conducted in the gaps along the rotor surface or the housing surface to the first stages to which the hottest steam is applied.
- cooling or cooling steam can flow in this direction, it is directed to a point with a lower pressure level.
- This location can be, for example, a sealing chamber in a piston or housing shaft seal or, in the case of double-flow machines, a rear step in the second flow.
- This point can also be the machine's exhaust steam. So that no hot steam flows into the cooling interstices, it is necessary to seal the cooling interstice from the hot steam under higher pressure. Pressure-tight protective shields or plates are used for this.
- the steam turbine has a single-flow design and a seal, in particular in the form of a piston or housing shaft seal, is provided in the area of the inflow on the side opposite the steam channel between the rotor and the inner casing, second protective shields are preferred in the area of the seal, forming a wider space arranged at a distance from the surface of the rotor or the inner housing to be protected, and the cooling steam flowing through the intermediate space behind the first protective shields is then passed through the intermediate spaces behind the second protective shields.
- a seal in particular in the form of a piston or housing shaft seal
- first and second protective shields are provided to protect the surface of the rotor, a common intermediate space is formed behind the first and second protective shields.
- first and second protective shields are provided to protect the surface of the inner housing, are behind the first and second protective shields Intermediate spaces are formed which are connected to one another, preferably by a channel or bore around the area of the inflow in the inner housing.
- FIG. 1 shows a longitudinal section of a first preferred exemplary embodiment of the invention with actively steam-cooled protective shields for protecting the rotor;
- FIG. 2 shows, in a representation comparable to FIG. 1, a second preferred exemplary embodiment of the invention with actively steam-cooled protective shields for protecting the inner housing;
- Embodiment for "passive”, not steam-cooled protective shields which are mounted on the rotor by means of hammer-head-like feet in the area of the seal;
- Fig. 4 is a preferred in an enlarged section
- Embodiment for actively steam-cooled protective shields which are mounted on the rotor by means of hammer-head-like feet in the area of the seal;
- Fig. 5 is a preferred in an enlarged section
- Fig. 6 is a preferred in an enlarged section
- Embodiment for actively steam-cooled protective shields which are mounted on the rotor between the blades by means of hammer-head-like feet.
- FIG. 7 shows, in a representation comparable to FIG. 1, a third preferred exemplary embodiment of the invention with actively steam-cooled protective shields for protecting the inner housing;
- 1 shows a first preferred exemplary embodiment of the invention with actively steam-cooled protective shields for protecting the rotor.
- 1 shows an arrangement for a steam turbine 10 with a single-flow inner casing 11. Hot steam flows from the inflow 15 through the steam duct 14, which is formed between the inner casing 11 and the rotor 12 of the steam turbine 10, which can be rotated about an axis 13, and in the guide vanes 16 and rotor blades 17 are located in several stages connected in series. The pressure and temperature of the steam decrease from stage to stage.
- steam is removed after the second stage (see the arrows) and is used as cooling steam in a space 21 under protective shields 18 and 19 along the surface of the rotor 12 and into the rear third of a piston seal 22, which is located between the rotor 12 and inner housing 11 is located on the side of the inflow opposite the steam duct 14.
- the cooling steam mixes with the over the first two thirds steam from the inflow 15 is relaxed from the piston seal 22.
- Passive protective shields 20 are attached to the rotor 12 in the last third of the piston seal 22, although they do not keep the above-mentioned mixed steam at high temperature away from the rotor, for example via gaps in the protective shield 20 to the rotor. Can penetrate the door surface, but prevent this mixed steam from causing a high relative speed to the rotor surface and thus a high heat input into the rotor.
- FIG. 2 a representation comparable to FIG. 1 shows a steam turbine 10 in an arrangement in which steam from the third stage of the steam duct 14 is used (see the arrows shown) in order to cool the inner casing 11.
- the cooling steam is passed through an intermediate space 27 which is formed between the inner surface of the inner housing 11 and protective shields 23 arranged at a distance above it in the steam channel or protective shields 24 in the seal or piston seal 22.
- a channel or a bore 26 is provided in the inner housing 11 here.
- the cooling steam is separated from the hot steam by the protective shields 23 in the steam channel 14 and 24 in the piston seal 22.
- the cooling or cooling steam is mixed with the sealing steam that comes from the inflow 15 via the seal 22.
- the inner housing 11 is then provided with a passive protective shield 25 within the seal 22.
- FIG. 7 shows a steam turbine 10 in an arrangement comparable to FIG. 2, in which an additional space 41 is created between the inner casing 11 and the outer casing 40 by seals 42, 43.
- an additional space 41 is created between the inner casing 11 and the outer casing 40 by seals 42, 43.
- two channels 26a and 26b are provided here in the inner housing. The cooling steam flows from the space 27 at
- FIG. 3 shows preferred exemplary embodiments for passive protective shields or plates 20a, 20b and 20c in the piston or shaft seal 22.
- the protective shields 20a, 20b, 20c are fastened in the rotor 12 with hammer-head-like feet.
- a narrow gap 29 with the width a may and should even be present between the protective shields 20a, 20b, 20c and the rotor surface in order to reduce the heat transfer from the protective shields 20a, 20b, 20c to the rotor 12.
- Sealing strips 30 are attached to the protective shields 20a, 20b, 20c and, together with the sealing strips 31 on the inner housing 11, throttle the steam.
- protective shields or plates 19a, 19b that is to say protective shields which separate the steam flow in the seal 22 against the cooling steam flow in the intermediate space 21 between the protective shields 19a, 19b and the rotor 12 in a pressure-resistant manner.
- These protective shields 19a, 19b are located in a piston or shaft seal 22. In this example, too, they are fastened in the rotor 12 with hammer-like feet 28. They each have axial bores 32 so that the cooling steam can pass through the feet of the protective shields 19a, 19b unhindered.
- alternating sealing strips 30, 31 are provided between the protective shields 19a, 19b and the inner housing 11, between which the hot steam flows.
- Fig. 5 shows protective shields 33 in the steam channel 14, which are part of the blades 17 and can be either active or passive protective shields.
- the protective shields 33 overlap at the edges in order to achieve increased tightness.
- FIG. 6 finally shows active protective shields or plates 18 in the steam channel 14, below which there are in turn spaces 21 in which the cooling steam flows (see arrows shown).
- the protective shields 18 are also fastened to the rotor 12 with hammer-head-like feet 28.
- holes 36 are made in the protective shields 18 and holes 37 in the feet of the blades 17.
- Sealing strips 35 are located between the guide blades 16 and the protective shields 18 in order to seal the pressure drop at the guide wheel. Sealing strips 34 are also provided between the inner housing 11 and the rotor blades 17.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003240366A AU2003240366A1 (en) | 2002-07-01 | 2003-06-26 | Steam turbine |
JP2004516410A JP4525976B2 (en) | 2002-07-01 | 2003-06-26 | Steam turbine |
DE10392802T DE10392802B4 (en) | 2002-07-01 | 2003-06-26 | steam turbine |
US11/017,758 US7488153B2 (en) | 2002-07-01 | 2004-12-22 | Steam turbine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02014534.8 | 2002-07-01 | ||
EP02014534A EP1378630A1 (en) | 2002-07-01 | 2002-07-01 | Steam turbine |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/017,758 Continuation US7488153B2 (en) | 2002-07-01 | 2004-12-22 | Steam turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004003346A1 true WO2004003346A1 (en) | 2004-01-08 |
Family
ID=29719691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2003/000426 WO2004003346A1 (en) | 2002-07-01 | 2003-06-26 | Steam turbine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1378630A1 (en) |
JP (2) | JP4525976B2 (en) |
AU (1) | AU2003240366A1 (en) |
DE (1) | DE10392802B4 (en) |
WO (1) | WO2004003346A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8806874B2 (en) | 2012-07-20 | 2014-08-19 | Kabushiki Kaisha Toshiba | Axial turbine and power plant |
DE102017216558A1 (en) * | 2017-09-19 | 2019-03-21 | Siemens Aktiengesellschaft | Steam turbine with shaft seal arrangement |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2031183B1 (en) * | 2007-08-28 | 2015-04-29 | Siemens Aktiengesellschaft | Steam turbine shaft with heat insulation layer |
JP5546876B2 (en) * | 2009-01-16 | 2014-07-09 | 株式会社東芝 | Steam turbine |
DE102010033327A1 (en) * | 2010-08-04 | 2012-02-09 | Siemens Aktiengesellschaft | Domestic steam turbine with reheat |
US8662826B2 (en) * | 2010-12-13 | 2014-03-04 | General Electric Company | Cooling circuit for a drum rotor |
JP6253489B2 (en) * | 2014-04-09 | 2017-12-27 | 株式会社東芝 | Axial flow turbine |
EP2957729B1 (en) * | 2014-06-16 | 2019-05-15 | Siemens Aktiengesellschaft | Steam turbine with an improved exhaust casing |
JP6325742B2 (en) * | 2015-03-06 | 2018-05-16 | 株式会社東芝 | Axial turbine and power plant |
US20170067344A1 (en) * | 2015-09-03 | 2017-03-09 | General Electric Company | Rotating component, method of forming a rotating component and apparatus for forming a rotating component |
US10876408B2 (en) | 2015-12-24 | 2020-12-29 | Mitsubishi Power, Ltd. | Steam turbine |
JP6649808B2 (en) | 2016-03-07 | 2020-02-19 | 三菱日立パワーシステムズ株式会社 | Steam turbine plant |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR897716A (en) * | 1942-08-12 | 1945-03-29 | Cooled gas turbine | |
CH308991A (en) * | 1952-03-08 | 1955-08-15 | Schmalfeldt Hans | Method for cooling turbine blades. |
CH340669A (en) * | 1956-04-06 | 1959-08-31 | Sulzer Ag | Gas turbine with a multi-stage, at least partially cooled rotor |
DE1576975A1 (en) * | 1967-08-29 | 1970-11-05 | Prvni Brnenska Strojirna Zd Y | Device for the surface protection of a turbine runner working at high temperatures, especially for combustion turbines |
JPS58140403A (en) * | 1982-02-15 | 1983-08-20 | Toshiba Corp | Steam turbine |
US4405284A (en) * | 1980-05-16 | 1983-09-20 | Mtu Motoren-Und-Turbinen-Union Munchen Gmbh | Casing for a thermal turbomachine having a heat-insulating liner |
JPS6035103A (en) * | 1983-08-04 | 1985-02-22 | Toshiba Corp | Steam turbine rotor cooling equipment |
EP1076184A2 (en) * | 1999-08-13 | 2001-02-14 | ABB Alstom Power (Schweiz) AG | Fixing device |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE898100C (en) * | 1942-08-13 | 1953-11-26 | Heinrich Dr-Ing Vorkauf | Cooled gas turbine runner |
US2815645A (en) * | 1955-03-01 | 1957-12-10 | Gen Electric | Super-critical pressure elastic fluid turbine |
JPS57119110A (en) * | 1981-01-16 | 1982-07-24 | Mitsubishi Heavy Ind Ltd | Cooling device for medium pressure dammy ring of reheating steam turbine |
JPS5812601U (en) * | 1981-07-16 | 1983-01-26 | 株式会社東芝 | turbine impeller |
JPS58155203A (en) * | 1982-03-12 | 1983-09-14 | Toshiba Corp | Steam turbine |
JPS59155503A (en) * | 1983-02-24 | 1984-09-04 | Toshiba Corp | Rotor cooling device for axial flow turbine |
DE3310396A1 (en) * | 1983-03-18 | 1984-09-20 | Kraftwerk Union AG, 4330 Mülheim | MD STEAM TURBINE IN SINGLE-FLOW CONSTRUCTION FOR A HIGH-TEMPERATURE STEAM TURBINE SYSTEM WITH INTERMEDIATE HEATING |
JPS61138804A (en) * | 1984-12-10 | 1986-06-26 | Toshiba Corp | Cooling system for steam turbine |
FR2646466B1 (en) * | 1989-04-26 | 1991-07-05 | Alsthom Gec | INTERNAL STATOR HP-MP SINGLE STEAM TURBINE WITH CONTROLLED AIR CONDITIONING |
JPH0749002A (en) * | 1993-08-04 | 1995-02-21 | Mitsubishi Heavy Ind Ltd | Steam turbine high pressure casing |
ES2187687T3 (en) * | 1996-01-11 | 2003-06-16 | Siemens Ag | TURBINE TREE OF A STEAM TURBINE WITH INTERNAL REFRIGERATION. |
JP3615865B2 (en) * | 1996-05-14 | 2005-02-02 | 三菱重工業株式会社 | Steam turbine speed control stage |
DE19620828C1 (en) * | 1996-05-23 | 1997-09-04 | Siemens Ag | Steam turbine shaft incorporating cooling circuit |
JP3977546B2 (en) * | 1999-03-25 | 2007-09-19 | 株式会社東芝 | Steam turbine power generation equipment |
CN1119505C (en) * | 1999-10-29 | 2003-08-27 | 三菱重工业株式会社 | Steam turbine with improved outer shell cooling system |
-
2002
- 2002-07-01 EP EP02014534A patent/EP1378630A1/en not_active Withdrawn
-
2003
- 2003-06-26 DE DE10392802T patent/DE10392802B4/en not_active Expired - Fee Related
- 2003-06-26 AU AU2003240366A patent/AU2003240366A1/en not_active Abandoned
- 2003-06-26 WO PCT/CH2003/000426 patent/WO2004003346A1/en active Application Filing
- 2003-06-26 JP JP2004516410A patent/JP4525976B2/en not_active Expired - Fee Related
-
2010
- 2010-03-23 JP JP2010066218A patent/JP5008735B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR897716A (en) * | 1942-08-12 | 1945-03-29 | Cooled gas turbine | |
CH308991A (en) * | 1952-03-08 | 1955-08-15 | Schmalfeldt Hans | Method for cooling turbine blades. |
CH340669A (en) * | 1956-04-06 | 1959-08-31 | Sulzer Ag | Gas turbine with a multi-stage, at least partially cooled rotor |
DE1576975A1 (en) * | 1967-08-29 | 1970-11-05 | Prvni Brnenska Strojirna Zd Y | Device for the surface protection of a turbine runner working at high temperatures, especially for combustion turbines |
US4405284A (en) * | 1980-05-16 | 1983-09-20 | Mtu Motoren-Und-Turbinen-Union Munchen Gmbh | Casing for a thermal turbomachine having a heat-insulating liner |
JPS58140403A (en) * | 1982-02-15 | 1983-08-20 | Toshiba Corp | Steam turbine |
JPS6035103A (en) * | 1983-08-04 | 1985-02-22 | Toshiba Corp | Steam turbine rotor cooling equipment |
EP1076184A2 (en) * | 1999-08-13 | 2001-02-14 | ABB Alstom Power (Schweiz) AG | Fixing device |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 257 (M - 256) 16 November 1983 (1983-11-16) * |
PATENT ABSTRACTS OF JAPAN vol. 009, no. 162 (M - 394) 6 July 1985 (1985-07-06) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8806874B2 (en) | 2012-07-20 | 2014-08-19 | Kabushiki Kaisha Toshiba | Axial turbine and power plant |
DE102017216558A1 (en) * | 2017-09-19 | 2019-03-21 | Siemens Aktiengesellschaft | Steam turbine with shaft seal arrangement |
Also Published As
Publication number | Publication date |
---|---|
DE10392802B4 (en) | 2012-08-23 |
JP5008735B2 (en) | 2012-08-22 |
AU2003240366A1 (en) | 2004-01-19 |
DE10392802D2 (en) | 2005-06-09 |
JP2005538284A (en) | 2005-12-15 |
EP1378630A1 (en) | 2004-01-07 |
JP4525976B2 (en) | 2010-08-18 |
JP2010138916A (en) | 2010-06-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1945911B1 (en) | Steam turbine | |
EP0906494B1 (en) | Turbine shaft and process for cooling it | |
DE602004011859T2 (en) | Device for the control of gaps in a gas turbine | |
EP1505254B1 (en) | Gas turbine and associated cooling method | |
DE19620828C1 (en) | Steam turbine shaft incorporating cooling circuit | |
CH681243A5 (en) | ||
WO2010009997A1 (en) | Shroud seal segments arrangement in a gas turbine | |
DE3428892A1 (en) | Vane and sealing gap optimization device for compressors of gas turbine power plants, in particular gas turbine jet power plants | |
EP2108784A2 (en) | Flow machine with fluid injector component group | |
EP1848904B1 (en) | Sealing element for use in turbomachinery | |
DE10392802B4 (en) | steam turbine | |
DE1601557A1 (en) | Flow-medium-cooled stator arrangement | |
EP2179143A2 (en) | Gas turbine installation | |
EP2078137B1 (en) | Rotor for a turbo-machine | |
DE19914227A1 (en) | Heat protection device for gas turbines has cast protection elements located between main rotor part and rotor blade row | |
DE69632837T2 (en) | GAS TURBINE WHERE THE REFRIGERANT IS RE-USED | |
WO2003054356A1 (en) | Thermally loaded component | |
DE3428206A1 (en) | STATOR ARRANGEMENT IN A GAS TURBINE | |
EP1206627A1 (en) | Turbine and method for discharging leakage fluid | |
DE69711896T2 (en) | COOLING AIR CENTRIFUGAL COMPRESSORS BETWEEN ROTOR DISCS | |
WO2001086121A1 (en) | Method for cooling a shaft in a high-pressure expansion section of a steam turbine | |
EP2997236B1 (en) | Steam turbine | |
EP2601382B1 (en) | Disabling circuit in steam turbines for shutting off saturated steam | |
DE102010036071A1 (en) | Housing-side structure of a turbomachine | |
EP3587748B1 (en) | Housing structure for a turbo engine, turbo engine and method for cooling a housing section of a structure of a turbo engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 11017758 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004516410 Country of ref document: JP |
|
REF | Corresponds to |
Ref document number: 10392802 Country of ref document: DE Date of ref document: 20050609 Kind code of ref document: P |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10392802 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase | ||
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |