EP2479377A2 - Rotor de turbine à vapeur avec sections à température élevée et basse couplée mécaniquement utilisant différents matériaux - Google Patents

Rotor de turbine à vapeur avec sections à température élevée et basse couplée mécaniquement utilisant différents matériaux Download PDF

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Publication number
EP2479377A2
EP2479377A2 EP11195293A EP11195293A EP2479377A2 EP 2479377 A2 EP2479377 A2 EP 2479377A2 EP 11195293 A EP11195293 A EP 11195293A EP 11195293 A EP11195293 A EP 11195293A EP 2479377 A2 EP2479377 A2 EP 2479377A2
Authority
EP
European Patent Office
Prior art keywords
turbine rotor
rotor
section
stage
axial section
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Withdrawn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
EP11195293A
Other languages
German (de)
English (en)
Inventor
Duttatrey Parashar
Sandeep Kumar
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of EP2479377A2 publication Critical patent/EP2479377A2/fr
Withdrawn legal-status Critical Current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
    • 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
    • F01D5/026—Shaft to shaft connections
    • 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
    • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
    • F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
    • 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
    • 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
    • F05D2300/50212—Expansivity dissimilar

Definitions

  • This invention relates to rotors for turbomachines and, more specifically, to the construction of rotors in axial sections of different materials.
  • This invention resides in a turbine rotor comprising an elongated shaft including at least an HP region, the HP region having a first axial section supporting a stage 1 rotor wheel and a second axial section supporting a stage 2 rotor wheel, the first axial section formed of a relatively higher-temperature-capability material and the second axial section formed of a relatively lower-temperature-capability material; and means for mechanically coupling the first axial section and the second axial section.
  • the elongated shaft may include at least HP and IP regions, a combined HP/IP region having the at least first section supporting the stage 1 rotor wheel and the second section supporting the stage 2 rotor wheel.
  • a steam turbine rotor 10 is shown in schematic from and includes at least a high pressure (HP) region (or combined HP and intermediate pressure (IP) region) 12 that is formed to include at least first and second stage rotor wheels 14, 16, each of which supports a row of buckets 18, 20, respectively.
  • HP high pressure
  • IP intermediate pressure
  • the rotor 10 is formed in two axially-oriented and aligned sections 22, 24.
  • Section 22 includes the first stage rotor wheel 14 while section 24 includes the second stage rotor wheel 16. It will be appreciated that section 22 is in a high temperature region, exposed to steam at temperatures of about and above 1050°F.
  • Section 24, on the other hand, is in a lower temperature region, exposed to steam at a temperature of about and less than 1050°F.
  • the inventors have recognized that significant cost savings can be realized by using different materials for the rotor sections 22, 24 within the HP or combined HP/IP region 12.
  • a more expensive 12% Cr material e.g., ASTM A982, Grade B
  • a less expensive, lower % Cr material such as a Cr-MO-V material (e.g. ASTM A470, Grade D, Class 8) is suitable.
  • the rotor sections 22 and 24 are preferably joined together by any of several suitable mechanical coupling arrangements.
  • the rotor sections 22 and 24 are provided with (or formed with) facing radial flanges 26, 28, respectively, located between the first and second stage rotor wheels 14, 16 and joined by a circumferential array of axially-extending fasteners such as bolts 30 passing through the flanges and secured by nuts 32.
  • Figure 2 illustrates an alternative coupling arrangement where the radial flange 28 is eliminated and flange 26 is bolted directly to a hub portion 15 of the rotor wheel 16 using similar fasteners 30, 32.
  • Fig. 3 illustrates another mechanical coupling arrangement between the rotor sections 22, 24.
  • a reduced diameter end portion 34 of the section 24 is received within a blind bore 36 formed in section 22 axially between the rotor wheels 14, 16.
  • the coupled sections are secured by two or three fasteners (e.g. bolts) 38 oriented radially with respect to the longitudinal axis of the rotor.
  • Fig. 4 illustrates another example embodiment wherein a partially-threaded stud 40 extends between the rotor sections 22, 24.
  • a threaded, blind bore 42 is formed in the end of rotor section 24, aligned with a smooth through-bore 44 formed in rotor section 22.
  • the stud 40 is inserted through the smooth through-bore 44 and the threaded end 46 of the stud is threaded into the blind bore 42.
  • a threaded opposite end 48 of the stud 40 projects from the rotor section 22 and a nut 50 is applied there to lock the stud 40 in place, with sections 22, 24 joined together axially between the rotor wheels 14, 16.
  • the smooth portion of the stud 40 could terminate short of the flange 51 and a separate bolt could be threaded into the end of the bore 44 to lock the stud in place.
  • Fig. 5 illustrates yet another exemplary mechanical coupling utilizing a spline arrangement.
  • a reduced-diameter male spline 52 is formed at one end of the rotor section 24.
  • a female spline 54 is formed in the rotor section 22, with elongated slots (i.e., complimentary spline slots) 56 aligned to receive the elongated ribs 58 of the male spline 52.
  • the coupling occurs between the rotor wheels 14, 16.
  • Fig. 6 illustrates a variation of the spline coupling of Fig. 5 .
  • the male spline 60 of the rotor section 24 is in a cross-shape, with four equally-spaced ribs 62.
  • the female spline 64 in rotor section 22 is formed with four aligned slots 66 that receive the ribs 62.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP11195293A 2011-01-06 2011-12-22 Rotor de turbine à vapeur avec sections à température élevée et basse couplée mécaniquement utilisant différents matériaux Withdrawn EP2479377A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/985,508 US20120177494A1 (en) 2011-01-06 2011-01-06 Steam turbine rotor with mechanically coupled high and low temperature sections using different materials

Publications (1)

Publication Number Publication Date
EP2479377A2 true EP2479377A2 (fr) 2012-07-25

Family

ID=45442969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11195293A Withdrawn EP2479377A2 (fr) 2011-01-06 2011-12-22 Rotor de turbine à vapeur avec sections à température élevée et basse couplée mécaniquement utilisant différents matériaux

Country Status (5)

Country Link
US (1) US20120177494A1 (fr)
EP (1) EP2479377A2 (fr)
JP (1) JP2012145104A (fr)
CN (1) CN102587996A (fr)
RU (1) RU2011154008A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600069753A1 (it) * 2016-07-05 2018-01-05 Exergy Spa Assieme di turbine e treno di turbine comprendente almeno uno di detti assiemi
CN112678148A (zh) * 2020-12-22 2021-04-20 大连理工大学 一种独立的拱形带支撑的高低温连接结构

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103470309A (zh) * 2013-08-21 2013-12-25 东方电气集团东方汽轮机有限公司 一种分段组合式转子
CN105317465B (zh) * 2015-11-26 2017-04-12 北京全三维能源科技股份有限公司 汽轮机及其螺栓组合转子、组合转子的组装方法
CN105351011B (zh) * 2015-11-26 2017-03-29 北京全三维能源科技股份有限公司 汽轮机及其销钉组合转子、组合转子的组装方法
CN107856056B (zh) * 2017-12-18 2024-02-20 浙江钱江机器人有限公司 一种机器人的腕部件
US11674394B2 (en) * 2021-02-11 2023-06-13 Pratt & Whitney Canada Corp. Gas turbine engine rotor assembly and method of using same

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CH83747A (de) * 1919-04-12 1920-06-01 Der Maschinenfabriken Escher & Umlaufender Teil für Mehrstufige, rasch laufende Maschinen, insbesondere Dampfturbinen
JPS5924242B2 (ja) * 1976-03-31 1984-06-08 株式会社東芝 タ−ビンロ−タ−構体
JPS5944481B2 (ja) * 1980-12-01 1984-10-30 株式会社日立製作所 蒸気タ−ビンロ−タ系
US4683714A (en) * 1986-06-17 1987-08-04 General Motors Corporation Oil scavenge system
US6352385B1 (en) * 2000-07-31 2002-03-05 General Electric Company Mechanical coupling for cooperating rotatable members
DE10160847A1 (de) * 2001-12-12 2003-07-17 Valeo Auto Electric Gmbh Betätigungsvorrichtung, insbesondere zur Betätigung von Sperrdifferentialen von Fahrzeugen
US6994519B2 (en) * 2003-05-20 2006-02-07 General Electric Company Apparatus and methods for coupling axially aligned turbine rotors
EP1577494A1 (fr) * 2004-03-17 2005-09-21 Siemens Aktiengesellschaft Arbre soudé de turbine à vapeur et procédé de fabrication
US7775779B2 (en) * 2005-11-17 2010-08-17 Sclumberger Technology Corporation Pump apparatus, systems and methods
JP2007291966A (ja) * 2006-04-26 2007-11-08 Toshiba Corp 蒸気タービンおよびタービンロータ
JP4805728B2 (ja) * 2006-05-31 2011-11-02 株式会社東芝 蒸気タービンロータ及び蒸気タービン
US8251643B2 (en) * 2009-09-23 2012-08-28 General Electric Company Steam turbine having rotor with cavities
US8465259B2 (en) * 2010-04-29 2013-06-18 Siemens Energy, Inc. Gas turbine spindle bolt structure with reduced fretting motion

Non-Patent Citations (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600069753A1 (it) * 2016-07-05 2018-01-05 Exergy Spa Assieme di turbine e treno di turbine comprendente almeno uno di detti assiemi
WO2018007909A1 (fr) * 2016-07-05 2018-01-11 Exergy S.P.A. Ensemble de turbines et train de turbine comprenant au moins un tel ensemble
US11021960B2 (en) 2016-07-05 2021-06-01 Exergy International S.R.L. Set of turbines and a turbine train comprising at least one such set
CN112678148A (zh) * 2020-12-22 2021-04-20 大连理工大学 一种独立的拱形带支撑的高低温连接结构
CN112678148B (zh) * 2020-12-22 2022-05-20 大连理工大学 一种独立的拱形带支撑的高低温连接结构

Also Published As

Publication number Publication date
RU2011154008A (ru) 2013-07-10
US20120177494A1 (en) 2012-07-12
JP2012145104A (ja) 2012-08-02
CN102587996A (zh) 2012-07-18

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