WO2013017336A1 - 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

Info

Publication number
WO2013017336A1
WO2013017336A1 PCT/EP2012/062058 EP2012062058W WO2013017336A1 WO 2013017336 A1 WO2013017336 A1 WO 2013017336A1 EP 2012062058 W EP2012062058 W EP 2012062058W WO 2013017336 A1 WO2013017336 A1 WO 2013017336A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbine
push rod
turbine system
rotor
steam
Prior art date
Application number
PCT/EP2012/062058
Other languages
French (fr)
Inventor
Varun Arora
Tejinder Singh Grewal
Abhimanyu Gupta
Suvadeep Sen
Anmol Sharma
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CN201280038429.9A priority Critical patent/CN103717845B/en
Priority to JP2014523247A priority patent/JP5985634B2/en
Priority to EP12733012.4A priority patent/EP2721261B1/en
Priority to US14/236,368 priority patent/US20140248131A1/en
Publication of WO2013017336A1 publication Critical patent/WO2013017336A1/en

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
    • F01D25/28—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 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 ro ⁇ tor.
  • push rods are used between the casings of the intermediate pressure turbine and the low pressure turbine.
  • an electrical component is used for con ⁇ trolling 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.
  • 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.
  • FIG 1 illustrates a schematic diagram of a power generation system 1 in accordance with aspects of the present technique.
  • the power generation system 1 includes a turbine system 2 or a turbine train including one or more turbines.
  • the power generation system further includes a condenser assembly 4, a feed pump 8 connected to the condenser assembly 4, a boiler 10, a heat source assembly 12 and a generator 6 coupled to the turbine system 2.
  • 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 genera- tion 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 first turbine 22 includes a first rotor 28 operatively cou- pled to a second rotor 32 of the second turbine 24.
  • the sec ⁇ ond rotor 32 is coupled to a third rotor 34 of the third tur ⁇ bine 26 as depicted in FIG 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

A turbine system with a push rod arrangement is presented. The turbine system includes a first turbine (22) having a first rotor (28), a second turbine (24) having a second rotor (32), a push rod (54) coupled to a casing of the first turbine (22) at a first end (66) and to a casing of the second turbine (24) at a second end (68) characterized in that the push rod (54) comprises a device (52, 72) for controlling temperature.

Description

Description
A TURBINE SYSTEM COMPRISING A PUSH ROD ARRANGEMENT BETWEEN TWO HOUSINGS
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 genera¬ tion 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 recircula- tion 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. During operation of the power generation system, the turbine system is heated up. The casing and rotor of the turbine is generally made of different material and expand differen¬ tially. 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 ro¬ tor. To compensate for the expansion between the casing of the turbines and the rotors, push rods are used between the casings of the intermediate pressure turbine and the low pressure turbine.
However, there is still some differential expansion which can not be compensated through the use of current push rod mecha¬ nism resulting in accumulation of expansion at the end of the turbine system, requiring significant amount of axial clear¬ ance in the design of the turbine system. Currently used push rods are rigid which do not allow reduc¬ tion of differential expansion in rotor trains with two or three low pressure turbine configuration. It is therefore an object of the present invention to provide a push rod arrangement to compensate the differential expan¬ sion between the rotor train and the casing for a turbo- machine . The object is achieved by providing a turbine system accord¬ ing to claim 1 and a power generation system according to claim 13.
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 character¬ ized in that the push rod comprises a device for controlling temperature. By having a device for controlling the tempera- ture 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, wherein 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.
In one embodiment, an electrical component is used for con¬ trolling 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.
According to one embodiment, the push rod includes means for cooling to allow contraction of the push rod and also control the expansion of the push rod. In one embodiment, 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. In another embodiment, 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.
In one embodiment, 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.
In one embodiment, the turbine system includes a measuring device for calculating the differential expansion of the push rod . In another embodiment, 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 above-mentioned and other features of the invention will now be addressed with reference to the accompanying drawings of the present invention. The illustrated embodiments are in¬ tended to illustrate, but not limit the invention. The draw- ings contain the following figures, in which like numbers re¬ fer to like parts, throughout the description and drawings.
FIG 1 is a schematic diagram of a power generation system; FIG 2 is a schematic diagram of a turbine train;
FIG 3 is a schematic diagram of a turbine with a tempera¬ ture controlled push rod; FIG 4 is a schematic diagram depicting the induction heating of push rod, and FIG 5 is a schematic diagram of a turbine with push rod
having a steam jacket arrangement.
FIG 1 illustrates a schematic diagram of a power generation system 1 in accordance with aspects of the present technique. The power generation system 1 includes a turbine system 2 or a turbine train including one or more turbines. The power generation system further includes a condenser assembly 4, a feed pump 8 connected to the condenser assembly 4, a boiler 10, a heat source assembly 12 and a generator 6 coupled to the turbine system 2.
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 genera- tion 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 inter¬ mediate 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 as¬ sembly 4 is in flow communication with the boiler 10, a feed pump 8 facilitates pumping of condensate from condenser as¬ sembly 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 genera¬ tor 6 to produce electricity. FIG 2 is a diagrammatical illustration of a turbine system, such as the turbine system 2 of FIG 1. In the presently con¬ templated configuration, the turbine system 2 includes a high pressure turbine 20, a first turbine 22 which is an inter¬ mediate 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.
In accordance with the aspects of the present technique, the first turbine 22 includes a first rotor 28 operatively cou- pled to a second rotor 32 of the second turbine 24. The sec¬ ond rotor 32 is coupled to a third rotor 34 of the third tur¬ bine 26 as depicted in FIG 2.
Additionally, 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 tur¬ bine 20 and the first turbine 22 are coupled to each other through a coupling. In one embodiment, the coupling may in- elude 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 pres¬ sure turbine 20. More particularly, the thrust bearing 30 is disposed at a second face (not shown in FIG2) of the first rotor 28.
In accordance with aspects of the present technique, the tur¬ bine system includes a measuring device 40 such as a differ- ential expansion (DE) meter coupled to the third turbine 26. More particularly, in the presently contemplated configura¬ tion, 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) . However, in other embodiments, one or more 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 elec¬ tric 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 regu¬ lator for passing a desired amount of current to the push rod 54. The current when passed through the push rod via an in¬ ductor heats the push rod thus raising the temperature of the push rod 54.
In the presently contemplated configuration, 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.
In accordance with aspects of the present technique, the coolant may include material such as oil. Alternatively, steam from the low pressure turbine exhaust steam may be used as a coolant.
In one embodiment, 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 de¬ gree 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 tech¬ nique. 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. As previously noted 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 de¬ sired amount of cooling required for the push rod 54.
Referring to FIG 5, a schematic diagram depicting a section of a turbine 70 is depicted. The turbine 70 includes a push rod 54 with a device for controlling temperature. In the presently contemplated configuration 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.
As previously mentioned, 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 com¬ pensate 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.
Although, the embodiments of the present invention have been described with respect to a turbine system, such as a steam turbine system, it may be noted that similar technique and arrangement may also be used for a gas turbine system. Par- ticularly, the embodiments described hereinabove are applica¬ ble for steam turbine system as well as the gas turbine sys¬ tem.

Claims

Patent Claims
1. A turbine system (2) comprising:
- a first turbine (22) having a first rotor (28),
- a second turbine (24) having a second rotor (32),
- a push rod (54) coupled to a casing of the first turbine (22) at a first end (66) and to a casing of the second tur¬ bine (24) at a second end (68),
wherein the push rod (54) comprises a device (52, 72) for controlling temperature,
characterized in that
the device comprises a steam jacket (72) for heating the push rod ( 54 ) .
The turbine system (2) according to claim 1,
wherein the device comprises an electrical component (52) for heating the push rod (54) .
3. The turbine system (2) according to the claims 1 or 2, wherein the push rod (54) comprises means for cooling.
4. The turbine system (2) according to claim 3,
wherein the means of cooling comprises a through hole (60) within the push rod (54) .
5. The turbine system (2) according to claim 4,
wherein a coolant is passed through the through hole (60) for cooling.
6. The turbine system (2) according to claim 5,
wherein the coolant comprises oil or steam.
7. The turbine system (2) according to any of the claims 4 to 6,
further comprising one or more valves (64) for controlling the flow of coolant in the through hole (60) .
8. The turbine system (2) according to any of the claims 1 to 7,
further comprising a third turbine (26) having a third ro¬ tor (34) operatively coupled to the second rotor (32) or the first rotor (28) .
9. The turbine system (2) according to any of the claims 1 to 8,
further comprising a measuring device (40) for measuring the differential expansion in the turbine system (2) .
10. The turbine system (2) according to claim 9,
wherein the measuring device (40) is configured to provide a signal to the temperature controlling device (52, 72) .
11. The turbine system (2) according to any of the claims 1 to 11,
wherein the measuring device (40) is coupled to the third rotor (34) distal to the second rotor (32) or the first ro- tor (28) .
12. The turbine system (2) according to any of the claims 1 to 12,
further comprising a high pressure turbine (20) disposed axially upstream the first turbine (22) .
13. A power generation system (1) comprising a turbine system (2) according to any of the claims 1 to 12.
14. The power generation system (1) according to claim 13, wherein the device for controlling temperature comprises an electrical component (52) for heating the push rod (54) .
15. The power generation system (1) according to claim 13, wherein the device for controlling temperature comprises a steam jacket (72) for heating the push rod (54) .
PCT/EP2012/062058 2011-08-02 2012-06-22 A turbine system comprising a push rod arrangement between two housings WO2013017336A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201280038429.9A CN103717845B (en) 2011-08-02 2012-06-22 Turbine system and comprise the power generation system of this turbine system
JP2014523247A JP5985634B2 (en) 2011-08-02 2012-06-22 Turbine system with push rod mechanism between two housings
EP12733012.4A EP2721261B1 (en) 2011-08-02 2012-06-22 A turbine system comprising a push rod arrangement between two housings
US14/236,368 US20140248131A1 (en) 2011-08-02 2012-06-22 Push rod arrangement for turbine system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11176302.5 2011-08-02
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
WO2013017336A1 true WO2013017336A1 (en) 2013-02-07

Family

ID=44993979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/062058 WO2013017336A1 (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 (en)
EP (2) EP2554801A1 (en)
JP (2) JP5985634B2 (en)
CN (1) CN103717845B (en)
WO (1) WO2013017336A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2910741A1 (en) * 2014-02-24 2015-08-26 Siemens Aktiengesellschaft Heatable push rod for a steam turbine
JP7116692B2 (en) * 2019-02-05 2022-08-10 三菱重工業株式会社 Steam turbine power generation equipment and method of operating steam turbine power generation equipment

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GB995473A (en) * 1962-05-30 1965-06-16 Rateau Soc Turbine with double-casing low-pressure cylinder
GB1145612A (en) * 1966-04-12 1969-03-19 Licentia Gmbh Improvements relating to steam turbines
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

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GB205559A (en) * 1922-07-17 1923-10-17 Charles Algernon Parsons Improvements in and relating to elastic fluid turbines
JPS5257411A (en) * 1975-11-07 1977-05-11 Hitachi Ltd Gap adjusting apparatus for steam turbine
JPS6141802U (en) * 1984-08-22 1986-03-17 株式会社東芝 Steam turbine casing position adjustment device
JP2820505B2 (en) * 1990-05-29 1998-11-05 三菱重工業株式会社 Steam turbine flange bolt cooling system
JPH04132805A (en) * 1990-09-25 1992-05-07 Fuji Electric Co Ltd Differential expansion controller for low pressure turbine
DE19629933C1 (en) * 1996-07-24 1997-09-04 Siemens Ag Steam-turbine plant e.g. with two inner low-pressure (ND) housings
JP4746499B2 (en) * 2006-08-31 2011-08-10 川崎重工業株式会社 Atmospheric pressure combustion turbine system with improved shaft cooling structure

Patent Citations (6)

* 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
GB1145612A (en) * 1966-04-12 1969-03-19 Licentia Gmbh Improvements relating to steam turbines
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

Also Published As

Publication number Publication date
EP2554801A1 (en) 2013-02-06
JP5985634B2 (en) 2016-09-06
JP2014521870A (en) 2014-08-28
US20140248131A1 (en) 2014-09-04
CN103717845A (en) 2014-04-09
EP2721261B1 (en) 2015-10-14
JP2016136026A (en) 2016-07-28
CN103717845B (en) 2016-02-17
EP2721261A1 (en) 2014-04-23

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