EP2554801A1 - A turbine system comprising a push rod arrangement between two housings - Google Patents

A turbine system comprising a push rod arrangement between two housings Download PDF

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Publication number
EP2554801A1
EP2554801A1 EP11176302A EP11176302A EP2554801A1 EP 2554801 A1 EP2554801 A1 EP 2554801A1 EP 11176302 A EP11176302 A EP 11176302A EP 11176302 A EP11176302 A EP 11176302A EP 2554801 A1 EP2554801 A1 EP 2554801A1
Authority
EP
European Patent Office
Prior art keywords
turbine
push rod
turbine system
rotor
casing
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Withdrawn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
EP11176302A
Other languages
German (de)
English (en)
French (fr)
Inventor
Varun Arora
Tejinder Singh Grewal
Abhimanyu Gupta
Suvadeep Sen
Anmol Sharma
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 EP11176302A priority Critical patent/EP2554801A1/en
Priority to CN201280038429.9A priority patent/CN103717845B/zh
Priority to US14/236,368 priority patent/US20140248131A1/en
Priority to PCT/EP2012/062058 priority patent/WO2013017336A1/en
Priority to EP12733012.4A priority patent/EP2721261B1/en
Priority to JP2014523247A priority patent/JP5985634B2/ja
Publication of EP2554801A1 publication Critical patent/EP2554801A1/en
Priority to JP2016083434A priority patent/JP2016136026A/ja
Withdrawn legal-status Critical Current

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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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • 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 present invention relates to a turbine system for power generation system and more particularly to a push rod arrangement for the turbine system for use in a power generation system.
  • a power generation system includes a turbine system such as a steam turbine system which utilizes a condenser to condense exhausted steam produced in a boiler to drive the turbine system; this steam is turned into liquid water for recirculation through the system.
  • the turbine system includes a high pressure turbine, an intermediate pressure turbine and a low pressure turbine.
  • a generator is coupled to the low pressure turbine via a drive shaft to generate electricity.
  • the casing and rotor of the turbine is generally made of different material and expand differentially. More particularly, the thermal expansion of the rotor is greater than the casing of the turbine; therefore in a turbine system thermal expansion of the intermediate pressure turbine rotor is transferred to the low pressure turbine rotor.
  • push rods are used between the casings of the intermediate pressure turbine and the low pressure turbine.
  • the object is achieved by providing a turbine system according to claim 1 and a power generation system according to claim 14.
  • the turbine system includes a first turbine having a first rotor, a second turbine having a second rotor, a push rod coupled to a casing of the first turbine at a first end and to a casing of the second turbine at a second end characterized in that the push rod comprises a device for controlling temperature.
  • the push rod By having a device for controlling the temperature of the push rod, the push rod would be expanded when heated and contracted when cooled thereby compensating for differential expansion in the turbine system.
  • an electrical component is used for controlling the temperature and thereby the heating the push rod.
  • An electric current is passed to the push rod thereby causing induction heating of the rod, which results in expansion of the push rod.
  • a steam jacket is used to heat the push rod. Steam is passed into the jacket at about 300 degree centigrade resulting in heating of the rod and resulting thermal expansion.
  • the push rod includes means for cooling to allow contraction of the push rod and also control the expansion of the push rod.
  • the means for cooling is a through hole in the push rod; the through hole in the push rod allows coolant to pass through the push rod thereby allowing cooling.
  • the coolant includes oil or steam from low pressure turbine exhaust steam.
  • Oil is efficient absorber of heat; also steam from low pressure turbine exhaust is at a relatively low temperature and would allow cooling of the push rod.
  • one or more valves allow a desired amount of coolant to pass through the through hole of the push rod depending on the amount of expansion or contraction required in the push rod.
  • the turbine system includes a measuring device for calculating the differential expansion of the push rod.
  • the measuring device is configured to provide a signal to the temperature controlling device.
  • the measuring device based on the differential expansion provides a signal to the temperature control device which then heats or cools the push rod.
  • the heat source assembly 12 such as a burner may include any heat source such as, but not limited to a nuclear heat source or a fossil fuel heat source which enables the power generation system 1 to function.
  • the boiler 10 is coupled to the heat source which is also in a flow communication with the turbine system 2.
  • the turbine system 2 which may also be referred to as the turbine train may include one or more turbines in a serial flow arrangement such as a high pressure turbine, an intermediate pressure turbine and a low pressure turbine.
  • the one or more turbines are coupled in flow communication with each other.
  • the turbine system 2 is coupled in flow communication with the condenser assembly 4 and operatively coupled to the generator 6 via at least one drive shaft.
  • the condenser assembly 4 is in flow communication with the boiler 10, a feed pump 8 facilitates pumping of condensate from condenser assembly 4 to the boiler 10.
  • the heat source assembly 12 heats a working fluid, such as water in the boiler 10 to produce steam therein.
  • the steam is directed into the turbine system 2 for driving the turbines, which in turn actuate the generator 6 to produce electricity.
  • FIG 2 is a diagrammatical illustration of a turbine system, such as the turbine system 2 of FIG 1 .
  • the turbine system 2 includes a high pressure turbine 20, a first turbine 22 which is an intermediate pressure turbine, a second turbine 24 and a third turbine 26.
  • the second turbine 24 and the third turbine 26 are two low pressure turbines.
  • the turbines are arranged in flow communication with each other. More particularly, the turbines are in a serial flow arrangement, wherein rotors of the turbines are operatively coupled to each other.
  • the first turbine 22 includes a first rotor 28 operatively coupled to a second rotor 32 of the second turbine 24.
  • the second rotor 32 is coupled to a third rotor 34 of the third turbine 26 as depicted in FIG 2 .
  • the third rotor 34 of the third turbine 26 is coupled to the generator 6 via a drive shaft 29.
  • the turbine system 2 also includes a high pressure turbine 20 disposed axially upstream the first turbine 22.
  • the high pressure turbine 20 and the first turbine 22 are coupled to each other through a coupling.
  • the coupling may include a thrust bearing 30 which is disposed between the first rotor 28 of the first turbine 22 and a rotor of the high pressure turbine 20.
  • the thrust bearing 30 prevents expansion of the first rotor 28 in a direction towards the high pressure turbine 20. More particularly, the thrust bearing 30 is disposed at a second face (not shown in FIG2 ) of the first rotor 28.
  • the turbine system includes a measuring device 40 such as a differential expansion (DE) meter coupled to the third turbine 26. More particularly, in the presently contemplated configuration, the DE meter is placed at a location proximal to the generator 6. It may be noted that the DE meter is connected to an inner casing of the third turbine 26.
  • the DE motor is configured to provide a signal as an output to a temperature controlling device of a push rod (not shown in FIG2 ).
  • a DE meters may be present wherein each DE meter is coupled to each turbine to measure the differential expansion at each turbine.
  • the temperature controlling device may be a heating system for the push rod. It may be noted that heating in the push rod may be induced electrically, such as, by passing an electric current to heat the push rod. Alternatively, heating in the push rod may be produced by passing heated substance such as a steam flow to increase the temperature of the push rod as will be described with reference to FIG 3 and FIG 4 .
  • FIG 3 is a schematic diagram depicting a section of a turbine 50 in accordance with aspects of the present technique.
  • a push rod 54 is coupled to an inner casing 56 of the steam turbine 50 at a first end and to an outer casing 58 of the second turbine (not shown) at the second end.
  • the push rod 54 includes a device 52 for controlling temperature.
  • the device 52 is an electric component such as an electric current regulator for passing a desired amount of current to the push rod 54. The current when passed through the push rod via an inductor heats the push rod thus raising the temperature of the push rod 54.
  • the push rod 54 includes means for cooling such as but not limited to a through hole 60 which is used for cooling purposes.
  • the through hole 60 extends along the length of the push rod 54.
  • the through hole 60 allows a coolant to pass through it thereby reducing the temperature of the push rod 54.
  • the coolant may include material such as oil.
  • steam from the low pressure turbine exhaust steam may be used as a coolant.
  • an oil spray system may also be used as a means for cooling the push rod.
  • the push rod 54 is heated to a temperature of about 300 degree centigrade which results in the expansion of push rod in the range of about 8 to 9 mm. In case, a lesser expansion is needed the cooling mechanism as described hereinabove may be used. It may be noted that the flow of coolant in the through hole 60 may be controlled through a use of valves (not shown in FIG 3 ).
  • the measuring device 40 which is the DE meter measures the differential expansion between the casing and the rotor of the turbine system.
  • the DE meter 40 provides a signal to the device 52 for controlling temperature which is the electric current regulator to provide a desired current to heat the push rod 54 accordingly.
  • FIG 4 is a schematic diagram depicting the exemplary push rod arrangement in accordance with aspects of the present technique.
  • the push rod 54 is coupled to an inner casing to the first turbine 22 at a first end 66 and to the outer casing of the second turbine 24 at a second end 68.
  • the temperature controlling device 52 which is an electric current regulator provides a desired amount of current to heat the push rod 54, as illustrated in FIG 4 .
  • the push rod 54 includes the through hole 60 for allowing the coolant to pass through the push rod 54 for cooling purposes.
  • One or more valves 64 control a flow 62 of the coolant based on the desired amount of cooling required for the push rod 54.
  • the turbine 70 includes a push rod 54 with a device for controlling temperature.
  • the device is a steam jacket 72 enclosing the push rod 54.
  • Steam from the first turbine, such as, the intermediate pressure turbine is used to heat the push rod 54.
  • Steam from the intermediate pressure turbine is at a temperature of around 350 degree centigrade; such temperature is capable of heating the push rod 54 and causing thermal expansion in the push rod 54.
  • the push rod 54 includes the through hole 60 for passing coolant for controlled contraction of the push rod 54.
  • the measuring device 40 such as DE meter is connected to the steam jacket 72 which provides information on the extent of expansion required in the push rod to compensate for the differential expansion between the rotor and the casing of the turbines in the turbine system.
  • a steam mass flow may be regulated based on the information from the measuring device 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
EP11176302A 2011-08-02 2011-08-02 A turbine system comprising a push rod arrangement between two housings Withdrawn EP2554801A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP11176302A EP2554801A1 (en) 2011-08-02 2011-08-02 A turbine system comprising a push rod arrangement between two housings
CN201280038429.9A CN103717845B (zh) 2011-08-02 2012-06-22 涡轮机系统及包括该涡轮机系统的发电系统
US14/236,368 US20140248131A1 (en) 2011-08-02 2012-06-22 Push rod arrangement for turbine system
PCT/EP2012/062058 WO2013017336A1 (en) 2011-08-02 2012-06-22 A turbine system comprising a push rod arrangement between two housings
EP12733012.4A EP2721261B1 (en) 2011-08-02 2012-06-22 A turbine system comprising a push rod arrangement between two housings
JP2014523247A JP5985634B2 (ja) 2011-08-02 2012-06-22 二つのハウジング間にプッシュロッド機構を備えたタービンシステム
JP2016083434A JP2016136026A (ja) 2011-08-02 2016-04-19 二つのハウジング間にプッシュロッド機構を備えたタービンシステム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11176302A EP2554801A1 (en) 2011-08-02 2011-08-02 A turbine system comprising a push rod arrangement between two housings

Publications (1)

Publication Number Publication Date
EP2554801A1 true EP2554801A1 (en) 2013-02-06

Family

ID=44993979

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11176302A Withdrawn EP2554801A1 (en) 2011-08-02 2011-08-02 A turbine system comprising a push rod arrangement between two housings
EP12733012.4A Not-in-force EP2721261B1 (en) 2011-08-02 2012-06-22 A turbine system comprising a push rod arrangement between two housings

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12733012.4A Not-in-force EP2721261B1 (en) 2011-08-02 2012-06-22 A turbine system comprising a push rod arrangement between two housings

Country Status (5)

Country Link
US (1) US20140248131A1 (ja)
EP (2) EP2554801A1 (ja)
JP (2) JP5985634B2 (ja)
CN (1) CN103717845B (ja)
WO (1) WO2013017336A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910741A1 (de) 2014-02-24 2015-08-26 Siemens Aktiengesellschaft Beheizbare Schubstange für eine Dampfturbine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7116692B2 (ja) * 2019-02-05 2022-08-10 三菱重工業株式会社 蒸気タービン発電設備および蒸気タービン発電設備の運転方法

Citations (5)

* 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
US4744726A (en) * 1985-06-27 1988-05-17 Kraftwerk Union Aktiengesellschaft Turboset with at least one low-pressure turbine stage having an outer housing and an inner housing coaxial thereto, and with high-pressure and/or medium-pressure turbine stage
US5388960A (en) * 1992-10-05 1995-02-14 Kabushiki Kaisha Toshiba Forced-air cooling apparatus of steam turbine
US6092986A (en) * 1996-07-24 2000-07-25 Siemens Aktiengesellschaft Turbine plant having a thrust element, and thrust element
US20100054911A1 (en) * 2008-08-29 2010-03-04 General Electric Company System and method for adjusting clearance in a gas turbine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB205559A (en) * 1922-07-17 1923-10-17 Charles Algernon Parsons Improvements in and relating to elastic fluid turbines
GB1145612A (en) * 1966-04-12 1969-03-19 Licentia Gmbh Improvements relating to steam turbines
JPS5257411A (en) * 1975-11-07 1977-05-11 Hitachi Ltd Gap adjusting apparatus for steam turbine
JPS6141802U (ja) * 1984-08-22 1986-03-17 株式会社東芝 蒸気タ−ビンの車室位置調整装置
JP2820505B2 (ja) * 1990-05-29 1998-11-05 三菱重工業株式会社 蒸気タービンフランジボルトの冷却装置
JPH04132805A (ja) * 1990-09-25 1992-05-07 Fuji Electric Co Ltd 低圧タービンの伸び差制御装置
DE19629933C1 (de) * 1996-07-24 1997-09-04 Siemens Ag Turbinenanlage mit Schubelement sowie Schubelement
JP4746499B2 (ja) * 2006-08-31 2011-08-10 川崎重工業株式会社 軸冷却構造を改良した常圧燃焼タービンシステム

Patent Citations (5)

* 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
US4744726A (en) * 1985-06-27 1988-05-17 Kraftwerk Union Aktiengesellschaft Turboset with at least one low-pressure turbine stage having an outer housing and an inner housing coaxial thereto, and with high-pressure and/or medium-pressure turbine stage
US5388960A (en) * 1992-10-05 1995-02-14 Kabushiki Kaisha Toshiba Forced-air cooling apparatus of steam turbine
US6092986A (en) * 1996-07-24 2000-07-25 Siemens Aktiengesellschaft Turbine plant having a thrust element, and thrust element
US20100054911A1 (en) * 2008-08-29 2010-03-04 General Electric Company System and method for adjusting clearance in a gas turbine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910741A1 (de) 2014-02-24 2015-08-26 Siemens Aktiengesellschaft Beheizbare Schubstange für eine Dampfturbine
WO2015124333A1 (de) 2014-02-24 2015-08-27 Siemens Aktiengesellschaft Beheizbare schubstange für eine dampfturbine
CN106030048A (zh) * 2014-02-24 2016-10-12 西门子公司 用于蒸汽轮机的可加热的推杆
CN106030048B (zh) * 2014-02-24 2018-09-07 西门子公司 用于蒸汽轮机的可加热的推杆

Also Published As

Publication number Publication date
JP5985634B2 (ja) 2016-09-06
CN103717845A (zh) 2014-04-09
EP2721261A1 (en) 2014-04-23
EP2721261B1 (en) 2015-10-14
US20140248131A1 (en) 2014-09-04
JP2016136026A (ja) 2016-07-28
JP2014521870A (ja) 2014-08-28
WO2013017336A1 (en) 2013-02-07
CN103717845B (zh) 2016-02-17

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