EP2513432A1 - Dampfturbine in dreischaliger bauweise - Google Patents
Dampfturbine in dreischaliger bauweiseInfo
- Publication number
- EP2513432A1 EP2513432A1 EP10790445A EP10790445A EP2513432A1 EP 2513432 A1 EP2513432 A1 EP 2513432A1 EP 10790445 A EP10790445 A EP 10790445A EP 10790445 A EP10790445 A EP 10790445A EP 2513432 A1 EP2513432 A1 EP 2513432A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- flow
- housing
- medium
- steam
- 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.)
- Granted
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
- 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
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
Definitions
- the invention relates to a turbomachine comprising a rotor rotatably mounted about a rotation axis, an inner inner housing arranged around the rotor and an outer rotor
- Inner housing wherein an outer housing is disposed around the inner inner housing and the outer inner housing, wherein the
- Turbomachine has a trained for high-pressure steam first tide and formed for medium-pressure steam second tide, wherein the second tide is oriented opposite to the first tide.
- a steam turbine ⁇ is meant, for example.
- a steam turbine conventionally includes a rotatably mounted rotor and a housing disposed about the rotor. Between the rotor and the inner housing, a flow channel is formed.
- the housing in a steam turbine must be able to fulfill several functions.
- the guide vanes are arranged in the flow channel on the housing and, secondly, the inner housing must withstand the pressure and the temperatures of the flow medium for all load and special operating cases.
- the flow medium is steam.
- the housing must be designed such that supply and Abrawun ⁇ conditions, which are also referred to as taps, are possible. Another feature that a case must meet is the possibility of a shaft end passing through the case.
- nickel-based alloys are suitable because they withstand the stresses occurring at high temperatures.
- the use of such a nickel-based alloy is associated with new challenges. So the cost of nickel-based alloys are comparatively high and also the manufacturability of nickel-based alloys, for example be limited by limited ⁇ casting ability. As a result, the use of nickel-based materials must be minimized. Furthermore, the nickel-based materials are poor heat conductors. As a result, the temperature gradients over the wall thickness are so rigid that thermal stresses are comparatively high. Furthermore, it must be taken into account that when using nickel-based materials, the temperature difference between the inlet and outlet of the steam turbine increases.
- Exterior housing structure incorporate according to the article Y.
- Inner housing structure disclosed and in DE 103 53 451 AI.
- the high-pressure part and the medium-pressure part are accommodated in an outer housing.
- the high pressure part is with
- Main steam temperature may correspond to heat. This reheated steam is then passed back into the turbomachine in the medium-pressure part and then flows through a medium-pressure blading.
- High-pressure part and the medium-pressure part in this case have oppositely arranged flow directions. Such embodiments are called reverse flow fluid machines. But there are also known flow machines, which are manufactured in a so-called single-flow design. In this type, the high-pressure part and the medium-pressure part are arranged one after the other and are in the same
- An essential idea of the invention is a
- the inner housing is in this case in an inner inner housing and an outer
- the inner inner housing formed.
- the inner inner housing is located in the region of the inflow area and must therefore withstand the high temperatures and the high pressures. Therefore, the inner inner housing is made of a suitable material, such as a nickel-based alloy or a higher quality material such as a steel, which comprises 9 - 10 wt .-% chromium. Between the inner inner housing and the rotor of the flow channel is formed.
- the inner inner housing therefore has means, such as grooves, for carrying vanes therein.
- To the inner case is a outer inner housing arranged. It is essential that between the inner inner housing and the outer
- Inner housing adedampf syndromem formed, which is acted upon with cooling medium.
- the outer inner housing is designed such that it is seen in the flow direction, adjacent to the inner inner housing and a boundary of the
- Flow channel represents, although in the outer
- Inner casing devices such as e.g. Grooves are provided to carry vanes.
- the outer inner casing is acted upon by steam in the simplifieddampf syndromem with a vapor, which is a
- the outer inner housing is formed of a less high-quality material.
- an outer housing is arranged around the inner inner housing and the outer inner housing.
- the turbomachine has a first flood, which is acted upon by a high-pressure steam and flows in a first flow direction. Furthermore, the
- the second flow direction is opposite to the first flow direction, so that this flow machine is designed in a so-called reverse flow design.
- the inner housing Surrounded or formed inner housing.
- the inner housing Surrounded or formed inner housing.
- Inner housing is made of a higher quality material and absorbs only the high pressure and medium pressure inflow including the balance piston and the Leitschaufelnuten up to the level of temperature and
- the inner inner housing kept compact to save space and also has a lower weight.
- a cooling steam flow line For flowing cooling steam into the cooling steam space, a cooling steam flow line is provided.
- Cooling steam flow line is fluidically connected to the second flood. This means that the medium-pressure steam is mainly flowed into the cooling steam space, which has ideal steam parameters to adequately cool the inner inner housing.
- the first flood has a high-pressure outflow area and the second flood has a medium-pressure outflow area, wherein the outer inner housing extends from the high-pressure outflow area to the medium-pressure outflow area.
- the outer inner housing therefore extends almost over the entire blading area of the rotor, with the outer
- Inner housing has devices to support vanes. However, not the entire flow area is formed with vanes in the outer inner housing. In the area of the inner inner casing, are in the outer
- Inner housing no vanes arranged.
- the outer inner housing is in this case formed of an upper part and a lower part.
- Upper part and the lower part are in turn formed from one piece and extend over the first and second tide.
- a cooling steam space is formed between the inner inner housing and the outer inner housing.
- the cooling steam in operation between the inner inner casing and the outer inner casing simultaneously constitutes the insulation to the outer inner casing which defines the cooling steam space and the inner inner casing encloses and the expansion path behind the
- the outer inner casing is in contact with this cooling steam and therefore may be of a lower quality material than the inner inner casing
- the primary and secondary stresses in the outer inner casing are only affected by the difference between the vapor state of the steam in the cooling steam space and the medium pressure exhaust steam.
- Primary stresses are mechanical stresses that result from external loads, e.g. caused by vapor pressures, weight forces and the like.
- Secondary voltages are, for example, thermoelectric voltages and represent mechanical stresses resulting from unbalanced temperature fields or
- the turbomachine is formed, inter alia, indedampf syndromem with a drain line that at a
- cooling steam space is formed with adedampfausströmungstechnisch for outflow of cooling steam from the cooling steam space. Due to the ongoing in operation outflow of the cooling steam from the
- the inner inner housing is in this case made of a higher quality material than the outer inner housing.
- the inner inner housing is formed in a first embodiment of a high-chromium material comprising 9 - 10 wt .-% chromium.
- the inner housing is formed from a nickel-based material.
- the outer inner casing is formed of a material comprising 1 - 2 wt .-% chromium.
- Embodiments are not to scale, but the drawing is schematic and / or light
- Figure 1 is a sectional view through a double-flow
- the steam turbine 1 shown in Figure 1 is a
- the steam turbine 1 comprises an outer housing 2, an inner inner housing 3, an outer inner housing 4 and a rotatably mounted rotor 5.
- the rotor 5 is rotatable about a rotation axis 6
- the outer housing 2 is formed from an upper part and a lower part, wherein the upper part above the
- Rotation axis 6 is shown in the drawing plane.
- Both the inner inner housing 3 and the outer inner housing 4 also has an upper part and a lower part, which, as in the outer housing 2, is constructed above and below the outer housing 2
- Rotation axis 6 is arranged.
- Outer housing 2 each have a horizontal parting line.
- a high-pressure steam flows into a high-pressure inflow region 7. Subsequently, the high-pressure steam flows along a first flow direction 9 through a blading 8 (not shown), the guide vanes and
- the blades are hereby arranged on the rotor 5 and the guide vanes on the inner inner casing 3 and outer inner casing 4. The temperature and the pressure of the high-pressure steam are thereby reduced. The high-pressure steam subsequently flows out of a high-pressure outflow region 10 out of the turbomachine to a reheater unit (not shown). Furthermore, not shown, the fluidic connection between the Hochdruckausström Society 10 and the
- this steam flows as medium-pressure steam over a medium-pressure inflow region 11 along a second flow direction 12 along a
- the medium pressure blading 13 has guide and blades not shown in detail.
- the blades are here on the rotor 5 and the
- Inner housing 4 is arranged.
- the inner inner casing 3 and the outer inner casing 4 are arranged around the rotor 5.
- the outer casing 2 is arranged.
- the inner inner housing 3 is formed in the region of the high-pressure inflow region 7 and the medium-pressure inflow region 11. As in the high-pressure inflow 7 and in
- the inner inner housing 3 is made of a higher quality material.
- the inner inner casing 3 is formed of a nickel-based alloy.
- the inner inner casing 3 is formed of a higher-grade material comprising 9-10% by weight of chromium.
- the outer inner housing 4 may be formed of a less high-quality material.
- the inner outer housing may be formed of a steel with 1 - 2 wt .-% chromium.
- the outer inner housing 4 extends at least from
- High pressure Ausström Scheme 10 along the axis of rotation 6 to the medium-pressure Ausström Scheme 14. That means that the inner inner housing 3 is disposed in the region of the high-pressure inflow region 7 and the medium-pressure inflow region 11 within the outer inner housing 4.
- Inner housing 4 is adedampfhoffm 16 is formed.
- Thisdedampfhoffm 16 is formed with a cooling steam flow line for the flow of cooling steam.
- the cooling steam 16 is removed at a suitable location from the medium-pressure blading 13 and can be removed, for example, to a gap 17 between the inner inner casing 3 and the outer inner casing 4.
- Blading 8 are sealed.
- the cooling steam could optionally be supplied via the gap 17 from the medium-pressure blading 13 or via a second gap 22 from the blading 8.
- the respective other side would have to be closed by a suitable first seal 23 or second seal 24.
- the outer inner casing 4 is formed along the first flow 18 and the second flow 19.
- the outer inner housing 4 has a
- the inner inner casing 3 takes the high pressure inflow portion 7 and the
- the inner inner housing 3 is characterized relatively small and thus cost-saving and offers a broadening of the potential suppliers because of the low tonnage.
- Cooling steam may, for example, be led through the outer inner housing 4 into an evacuation space 21 or e.g. by a
- Condensate dissipates or ensures sufficient residual flow in case of failure of the tap.
- the inner inner housing 3, the outer inner housing 4 and the outer housing 2 are pressure-bearing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10790445.0A EP2513432B1 (de) | 2009-12-15 | 2010-12-14 | Dampfturbine in dreischaliger Bauweise |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09015540A EP2336506A1 (de) | 2009-12-15 | 2009-12-15 | Dampfturbine in dreischaliger Bauweise |
PCT/EP2010/069576 WO2011082984A1 (de) | 2009-12-15 | 2010-12-14 | Dampfturbine in dreischaliger bauweise |
EP10790445.0A EP2513432B1 (de) | 2009-12-15 | 2010-12-14 | Dampfturbine in dreischaliger Bauweise |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2513432A1 true EP2513432A1 (de) | 2012-10-24 |
EP2513432B1 EP2513432B1 (de) | 2013-12-04 |
Family
ID=42270231
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09015540A Withdrawn EP2336506A1 (de) | 2009-12-15 | 2009-12-15 | Dampfturbine in dreischaliger Bauweise |
EP10790445.0A Not-in-force EP2513432B1 (de) | 2009-12-15 | 2010-12-14 | Dampfturbine in dreischaliger Bauweise |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09015540A Withdrawn EP2336506A1 (de) | 2009-12-15 | 2009-12-15 | Dampfturbine in dreischaliger Bauweise |
Country Status (5)
Country | Link |
---|---|
US (1) | US9222370B2 (de) |
EP (2) | EP2336506A1 (de) |
JP (1) | JP5551268B2 (de) |
CN (1) | CN102803661B (de) |
WO (1) | WO2011082984A1 (de) |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5260311A (en) * | 1975-11-12 | 1977-05-18 | Toshiba Corp | Turbine casing |
JPS5932961B2 (ja) | 1980-09-29 | 1984-08-13 | 日本国有鉄道 | 電気車の絶縁セクシヨンにおける旅客車用サ−ビス電源の瞬時停電防止方法 |
JPH0621521B2 (ja) * | 1983-06-10 | 1994-03-23 | 株式会社日立製作所 | 蒸気タ−ビンの主蒸気入口構造 |
JPS60195304A (ja) * | 1984-03-19 | 1985-10-03 | Hitachi Ltd | 蒸気タ−ビンケ−シングの熱応力制御装置 |
US4840537A (en) * | 1988-10-14 | 1989-06-20 | Westinghouse Electric Corp. | Axial flow steam turbine |
JP3620167B2 (ja) | 1996-07-23 | 2005-02-16 | 富士電機システムズ株式会社 | 再熱式軸流蒸気タービン |
EP0860511B1 (de) * | 1997-01-27 | 2003-09-17 | Mitsubishi Heavy Industries, Ltd. | Hochchromhaltiger, hitzebeständiger Gussstahl und daraus hergestellter Druckbehälter |
DE19909056A1 (de) * | 1999-03-02 | 2000-09-07 | Abb Alstom Power Ch Ag | Gehäuse für eine thermische Turbomaschine |
JP2000282808A (ja) * | 1999-03-26 | 2000-10-10 | Toshiba Corp | 蒸気タービン設備 |
DE10353451A1 (de) | 2003-11-15 | 2005-06-16 | Alstom Technology Ltd | Dampfturbine sowie Verfahren zum Herstellen einer solchen Dampfturbine |
EP1559872A1 (de) | 2004-01-30 | 2005-08-03 | Siemens Aktiengesellschaft | Strömungsmaschine |
EP1624155A1 (de) | 2004-08-02 | 2006-02-08 | Siemens Aktiengesellschaft | Dampfturbine und Verfahren zum Betrieb einer Dampfturbine |
DE102006027237A1 (de) | 2005-06-14 | 2006-12-28 | Alstom Technology Ltd. | Dampfturbine |
EP1744017A1 (de) | 2005-07-14 | 2007-01-17 | Siemens Aktiengesellschaft | Kombinierte Dampfturbine, Dampf- oder Gas- und Dampf- Turbinenanlage, Verfahren zum Betrieb einer kombinierten Dampfturbine |
EP2187004A1 (de) * | 2008-11-13 | 2010-05-19 | Siemens Aktiengesellschaft | Innengehäuse für eine Strömungsmaschine |
-
2009
- 2009-12-15 EP EP09015540A patent/EP2336506A1/de not_active Withdrawn
-
2010
- 2010-12-14 US US13/515,354 patent/US9222370B2/en not_active Expired - Fee Related
- 2010-12-14 EP EP10790445.0A patent/EP2513432B1/de not_active Not-in-force
- 2010-12-14 CN CN201080057260.2A patent/CN102803661B/zh not_active Expired - Fee Related
- 2010-12-14 JP JP2012543673A patent/JP5551268B2/ja not_active Expired - Fee Related
- 2010-12-14 WO PCT/EP2010/069576 patent/WO2011082984A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011082984A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011082984A1 (de) | 2011-07-14 |
JP2013513758A (ja) | 2013-04-22 |
JP5551268B2 (ja) | 2014-07-16 |
US20120257959A1 (en) | 2012-10-11 |
US9222370B2 (en) | 2015-12-29 |
CN102803661A (zh) | 2012-11-28 |
EP2513432B1 (de) | 2013-12-04 |
EP2336506A1 (de) | 2011-06-22 |
CN102803661B (zh) | 2015-06-17 |
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