EP1954922A1 - Dampfturbine mit lagerstreben - Google Patents
Dampfturbine mit lagerstrebenInfo
- Publication number
- EP1954922A1 EP1954922A1 EP06819859A EP06819859A EP1954922A1 EP 1954922 A1 EP1954922 A1 EP 1954922A1 EP 06819859 A EP06819859 A EP 06819859A EP 06819859 A EP06819859 A EP 06819859A EP 1954922 A1 EP1954922 A1 EP 1954922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- steam turbine
- struts
- shaft
- strut
- 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
- F01D9/00—Stators
- F01D9/06—Fluid supply conduits to nozzles or the like
- F01D9/065—Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids
-
- 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
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
Definitions
- the invention relates to a steam turbine with a Abdampfge- housing for guiding a Abdampfmassenstroms, a shaft ⁇ bearing for supporting a turbine shaft and at least two bearing struts, by means of which the shaft bearing is attached to the exhaust steam housing.
- FIG. 4 shows a cross-sectional view of a ⁇ known from the prior art bearing supporting strut 18. This is designed as a solid body and has bores 34 to the internal receiving supply lines, such as sealing steam lines. Between the supply lines and the bearing strut 18 only a small clearance is provided, which is why an internal heat transfer between the supply lines, in particular sealing steam lines and the bearing strut 18 takes place. Also from the outside, there is a heat input to the bearing brace 18 by the direct Be aufschlagung with Turbinenabdampf.
- the temperature of the exhaust steam can ren depending on the operating point strongly variie ⁇ , whereby the deformation behavior of the bearing strut 18 directly influenced.
- the bearing strut arrangements known in the prior art are therefore sensitive to temperature influences from inside and outside. Therefore, sealing steam temperatures are limited to values of below 150 0 C in the art and seen large radial plays between the bearing struts and the exhaust-steam casing and the shaft bearing forth.
- An object underlying the invention is to improve a steam turbine of the type mentioned in that thermodynamic efficiency advantages result for the entire turbine.
- each of the at least two bearing aim for a disposed in the respective bearing strut for guiding a cooling cavity coolant and said cooling cavities of the at least two bearing struts are fluidically connected via a sealed connection from ⁇ cavity in the region of the shaft bearing.
- the bearing struts can be effectively cooled by passing a suitable coolant from the inside.
- a suitable coolant for cooling air as a coolant, convection may cause internal cooling air flow through the bearing struts.
- ambient air is sucked through at least one of the bearing struts, passed through the connecting cavity and passed through another bearing strut back to the environment.
- the heat can be dissipated within the bearing struts and the influence of the temperature of the Abdampfmassenstroms outside the bearing struts and / or the temperature of running within the bearing struts supply media to the deformation behavior of the bearing struts are minimized.
- the radial clearance to the shaft bearing and Abdampfgephaseuse be designed smaller and less conservative.
- thermodynamic efficiency advantages can be generated for the entire turbine.
- Ver ⁇ realization of the cooling system according to the invention the radial clearance can even be reduced so that the bearing ⁇ striving can be welded directly between the outer Abdampfgephaseuse and an inner shaft seal housing of the shaft bearing.
- higher sealing steam temperatures can now be admitted in sealing steam lines laid within the bearing struts than was customary in the prior art. Sealing steam temperatures above 150 0 C are in the steam turbine according to the invention possible. This reduces the complexity of the sealing steam system and therefore saves manufacturing and maintenance costs.
- the cooling cavities of the at least two bearing struts each have an opening facing the exhaust steam housing.
- these openings are arranged on the exhaust steam housing facing the ends of the bearing struts.
- the cooling cavities of the at least two bearing struts and the connecting cavity form a pressure chamber enclosed by the exhaust steam flow of the steam turbine.
- the shaft bearing has a shaft seal ⁇ housing and the connecting cavity is disposed within the shaft seal housing. So that the flow ⁇ dynamics of the exhaust steam mass flow is not affected.
- the connection cavity is formed by means of leads routed outside a shaft seal housing.
- the connection cavity is formed within the shaft bearing.
- the connecting cavity is channel-shaped, in particular in the case of at least three bearing struts designed as a star-shaped channel system.
- the connection cavity can forward the coolant particularly well between the bearing struts.
- at least one of the bearing struts is arranged in the lower portion of the steam turbine and thus formed as a bearing bearing strut.
- the shaft bearing is held by means of at least three bearing struts
- at least two bearing struts are designed as bearing bearing struts, and are thus arranged in the lower portion of the steam turbine.
- the weight of the turbine shaft mounted in the shaft bearing is thereby distributed over a plurality of bearing struts, which in turn enables a reduction of the radial play.
- the at least two bearing struts are each formed as a hollow body.
- the interior of the hollow body forms the corresponding cooling cavity.
- the cooling effect of the guided in the cooling cavity coolant to the bearing strut is particularly high, as it flows along the outer wall of the hollow body.
- the cooling cavities each extend along at least a portion of the corresponding strut surfaces in the longitudinal direction of the respective bearing strut.
- the coolant directly to the corresponding portion of the strut surface along ge ⁇ be leads, which optimum cooling of the same. Due to the extent of the cooling cavities in the longitudinal direction of the respective bearing strut, the coolant can flow ⁇ technically particularly simple lead through the contiguous, flowed through by the coolant pressure chamber.
- the steam turbine is designed as a low-pressure turbine with axial outflow.
- the heat transfer through the exhaust steam mass flow to the bearing struts has an especially negative effect on embodiments used in the prior art.
- the proposed according to the invention cooling means for the bearing struts of the low pressure steam turbine made ⁇ light a partial explanatory by reducing the radial clearances especially before ⁇ increasing the thermodynamic efficiency, both during normal operation and in the transient operation of the turbine.
- the shaft bearing is designed as a rear shaft bearing of the low-pressure steam turbine.
- the rear shaft bearing and the tra ⁇ low-pressure low-pressure turbine bearing struts are located directly in the low-pressure evaporative mass flow.
- Fig. 1 is a cross-sectional view of an inventive
- Fig. 2 is a detail view of the sectional view of a low pressure steam turbine in the loading shown in Fig. 1 ⁇ reaching a lower bearing supporting strut,
- Fig. 3 is a detail view of that shown in Fig.l.
- Fig. 4 is a cross-sectional view of a known from the prior art bearing bearing strut. 1 shows the structure of a low-pressure steam turbine 10 according to the invention.
- the low-pressure steam turbine 10 has an outer exhaust steam housing 12 and an inner shaft seal housing 14.
- the shaft seal housing 14 includes a rear shaft bearing 16 for receiving a turbine shaft not shown in the drawing.
- the shaft seal housing 14 is attached to the exhaust steam housing 12 via three lower bearing bearing struts 18 and an upper bearing strut 20. These are the lower bearing bearing struts 18 and the upper
- Bearing strut 20 designed as a hollow body and welded directly between the outer Abdampfgekoruse 12 and the inner shaft seal housing 14.
- FIG. 2 shows a detail of the low-pressure steam turbine shown in FIG. 1 in the region of one of the three lower bearing bearing struts 18.
- the bearing 18 has a strut, the exhaust steam 12 with the shafts 14 connecting ⁇ seal housing, ⁇ solid executed bearing support 22.
- this bearing support 22 extends in the longitudinal direction of the same as a ventilation duct running cooling cavity 24.
- the bearing strut 18 is surrounded by a heat protection jacket 30 having a compensator 32 for
- cooling air 26 is sucked into the cooling cavity 24 of the bearing strut 18 via an opening 25 in the cooling cavity 24.
- the cooling air 26 enters into a connecting cavity 28 of the shaft seal housing 14 after flowing through the cooling cavity 24.
- the connection ⁇ cavity 28 in the shaft seal housing 14 ⁇ mig respective cooling cavities 24 connects sternför all bearing struts, ie both the three lower bearing struts 18 and the upper bearing strut 20.
- FIG. 3 also shows a section of the low-pressure steam turbine 10 in the region of the upper bearing strut 20.
- This also contains a massively designed bearing support 22 connecting the inner shaft seal housing 14 to the outer exhaust-gas casing 12.
- a cooling cavity 24 designed as a ventilation channel is likewise guided along this, which opens via an opening 25 in the exhaust steam housing 12.
- cooling cavity 24 of the OBE ⁇ ren bearing strut 20 accommodate the whole in the three supporting bearing struts 18 brought up cooling air flow is correspondingly larger the cross section of the cooling cavity 24 of the upper bearing strut 20th
- Cooling air 26 is reduced compared to the cooling effect of the run in the bearing supporting struts 18 cooling air 26 since the temperature ⁇ is already heated structure of the cooling air 26 while passing through the lower bearing struts 18th
- the cooling requirement of the upper bearing strut 20 is, however, lower, since it is exposed to lower mechanical loads as a non-bearing bearing strut and is therefore less susceptible to deformation.
- the cooling system according to the invention as shown in Fig. 1, to operate. That is, the cooling air flow 26 should be directed from bottom to top, ie first pass through the lower bearing bearing struts 18 and only then the upper bearing strut 20.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Support Of The Bearing (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06819859A EP1954922B1 (de) | 2005-12-01 | 2006-11-30 | Dampfturbine mit lagerstreben |
PL06819859T PL1954922T3 (pl) | 2005-12-01 | 2006-11-30 | Turbina parowa z zastrzałami łożyskowymi |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05026254A EP1793091A1 (de) | 2005-12-01 | 2005-12-01 | Dampfturbine mit Lagerstreben |
PCT/EP2006/069094 WO2007063088A1 (de) | 2005-12-01 | 2006-11-30 | Dampfturbine mit lagerstreben |
EP06819859A EP1954922B1 (de) | 2005-12-01 | 2006-11-30 | Dampfturbine mit lagerstreben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1954922A1 true EP1954922A1 (de) | 2008-08-13 |
EP1954922B1 EP1954922B1 (de) | 2010-07-21 |
Family
ID=36593748
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05026254A Withdrawn EP1793091A1 (de) | 2005-12-01 | 2005-12-01 | Dampfturbine mit Lagerstreben |
EP06819859A Not-in-force EP1954922B1 (de) | 2005-12-01 | 2006-11-30 | Dampfturbine mit lagerstreben |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05026254A Withdrawn EP1793091A1 (de) | 2005-12-01 | 2005-12-01 | Dampfturbine mit Lagerstreben |
Country Status (10)
Country | Link |
---|---|
US (1) | US8550773B2 (de) |
EP (2) | EP1793091A1 (de) |
JP (1) | JP4792507B2 (de) |
CN (1) | CN101321929B (de) |
AT (1) | ATE474998T1 (de) |
DE (1) | DE502006007506D1 (de) |
ES (1) | ES2348678T3 (de) |
PL (1) | PL1954922T3 (de) |
RU (1) | RU2392450C2 (de) |
WO (1) | WO2007063088A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9194246B2 (en) | 2011-09-23 | 2015-11-24 | General Electric Company | Steam turbine LP casing cylindrical struts between stages |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8979477B2 (en) * | 2011-03-09 | 2015-03-17 | General Electric Company | System for cooling and purging exhaust section of gas turbine engine |
PL220729B1 (pl) | 2011-10-03 | 2015-12-31 | Gen Electric | Układ turbiny gazowej |
US9039346B2 (en) * | 2011-10-17 | 2015-05-26 | General Electric Company | Rotor support thermal control system |
US9085995B2 (en) * | 2012-04-18 | 2015-07-21 | Hamilton Sundstrand Corporation | Anti-vortex shedding generator for APU support |
US9376934B2 (en) * | 2012-08-24 | 2016-06-28 | General Electric Company | Cooling circuit for reducing thermal growth differential of turbine rotor and shell supports |
US9631517B2 (en) | 2012-12-29 | 2017-04-25 | United Technologies Corporation | Multi-piece fairing for monolithic turbine exhaust case |
WO2014105603A1 (en) | 2012-12-29 | 2014-07-03 | United Technologies Corporation | Multi-piece heat shield |
EP2938863B1 (de) | 2012-12-29 | 2019-09-25 | United Technologies Corporation | Mechanische verbindung für segmentierten hitzeschild |
WO2014105602A1 (en) | 2012-12-29 | 2014-07-03 | United Technologies Corporation | Heat shield for a casing |
US9982561B2 (en) * | 2012-12-29 | 2018-05-29 | United Technologies Corporation | Heat shield for cooling a strut |
EP2853759A1 (de) | 2013-09-30 | 2015-04-01 | Siemens Aktiengesellschaft | Öllager mit Ölabflusssystem, Gasturbine mit einem solchen Öllager |
US20150354382A1 (en) * | 2014-06-06 | 2015-12-10 | General Electric Company | Exhaust frame cooling via strut cooling passages |
CA2936180A1 (en) | 2015-07-24 | 2017-01-24 | Pratt & Whitney Canada Corp. | Multiple spoke cooling system and method |
US10247035B2 (en) | 2015-07-24 | 2019-04-02 | Pratt & Whitney Canada Corp. | Spoke locking architecture |
US10443449B2 (en) | 2015-07-24 | 2019-10-15 | Pratt & Whitney Canada Corp. | Spoke mounting arrangement |
CN105257347B (zh) * | 2015-11-17 | 2019-01-15 | 上海电气电站设备有限公司 | 轴向排汽排汽缸轴承座冷却结构 |
CN105275511B (zh) * | 2015-11-17 | 2018-01-19 | 上海电气电站设备有限公司 | 轴承座落地支撑的轴向排汽排汽缸 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB623615A (en) * | 1947-05-06 | 1949-05-19 | Frederick William Walton Morle | Improvements in or relating to gas-turbine-engines |
GB819111A (en) * | 1957-10-25 | 1959-08-26 | Blackburn & Gen Aircraft Ltd | Improvements in and relating to the supporting members of the shaft bearing of fluidengines |
CH570549A5 (de) * | 1974-04-09 | 1975-12-15 | Bbc Sulzer Turbomaschinen | |
FR2646469B1 (fr) * | 1989-04-28 | 1991-07-05 | Alsthom Gec | Systeme de supportage du rotor dans une turbine a echappement axial avec le palier cote echappement integre a la fondation |
CH685448A5 (de) | 1991-03-28 | 1995-07-14 | Asea Brown Boveri Ag Ansaldo C | Dampfturbogruppe. |
US5212940A (en) * | 1991-04-16 | 1993-05-25 | General Electric Company | Tip clearance control apparatus and method |
JP2954797B2 (ja) * | 1992-10-05 | 1999-09-27 | 株式会社東芝 | 蒸気タ−ビンの強制冷却装置 |
DE19615011A1 (de) * | 1995-07-19 | 1997-01-23 | Siemens Ag | Bauteil für einen Abgasstutzen einer Strömungsmaschine, insbesondere einer Dampfturbine |
US5819525A (en) * | 1997-03-14 | 1998-10-13 | Westinghouse Electric Corporation | Cooling supply manifold assembly for cooling combustion turbine components |
US6430931B1 (en) * | 1997-10-22 | 2002-08-13 | General Electric Company | Gas turbine in-line intercooler |
CA2262050C (en) * | 1998-02-17 | 2003-07-08 | Mitsubishi Heavy Industries, Ltd. | Steam-cooling type gas turbine |
JP4527824B2 (ja) * | 1998-12-22 | 2010-08-18 | ゼネラル・エレクトリック・カンパニイ | タービンロータの軸受用冷却系 |
JP2002309906A (ja) * | 2001-04-11 | 2002-10-23 | Mitsubishi Heavy Ind Ltd | 蒸気冷却型ガスタービン |
JP2003206701A (ja) * | 2002-01-11 | 2003-07-25 | Mitsubishi Heavy Ind Ltd | ガスタービンのタービンローターおよびガスタービン |
DE10355738A1 (de) * | 2003-11-28 | 2005-06-16 | Alstom Technology Ltd | Rotor für eine Turbine |
-
2005
- 2005-12-01 EP EP05026254A patent/EP1793091A1/de not_active Withdrawn
-
2006
- 2006-11-30 CN CN2006800450030A patent/CN101321929B/zh not_active Expired - Fee Related
- 2006-11-30 DE DE502006007506T patent/DE502006007506D1/de active Active
- 2006-11-30 AT AT06819859T patent/ATE474998T1/de active
- 2006-11-30 US US12/085,699 patent/US8550773B2/en not_active Expired - Fee Related
- 2006-11-30 RU RU2008126725/06A patent/RU2392450C2/ru not_active IP Right Cessation
- 2006-11-30 EP EP06819859A patent/EP1954922B1/de not_active Not-in-force
- 2006-11-30 PL PL06819859T patent/PL1954922T3/pl unknown
- 2006-11-30 WO PCT/EP2006/069094 patent/WO2007063088A1/de active Application Filing
- 2006-11-30 JP JP2008542757A patent/JP4792507B2/ja not_active Expired - Fee Related
- 2006-11-30 ES ES06819859T patent/ES2348678T3/es active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007063088A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9194246B2 (en) | 2011-09-23 | 2015-11-24 | General Electric Company | Steam turbine LP casing cylindrical struts between stages |
Also Published As
Publication number | Publication date |
---|---|
US20100054927A1 (en) | 2010-03-04 |
JP4792507B2 (ja) | 2011-10-12 |
CN101321929B (zh) | 2011-01-26 |
CN101321929A (zh) | 2008-12-10 |
WO2007063088A1 (de) | 2007-06-07 |
EP1954922B1 (de) | 2010-07-21 |
ATE474998T1 (de) | 2010-08-15 |
US8550773B2 (en) | 2013-10-08 |
JP2009517592A (ja) | 2009-04-30 |
EP1793091A1 (de) | 2007-06-06 |
PL1954922T3 (pl) | 2010-12-31 |
DE502006007506D1 (de) | 2010-09-02 |
RU2392450C2 (ru) | 2010-06-20 |
RU2008126725A (ru) | 2010-01-10 |
ES2348678T3 (es) | 2010-12-10 |
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