US3773431A - Multiple shell turbine casing for high pressures and high temperatures - Google Patents

Multiple shell turbine casing for high pressures and high temperatures Download PDF

Info

Publication number: US3773431A
Authority: US; United States
Prior art keywords: casing; semi; outer casing; halves; multiple shell
Prior art date: 1970-12-08
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.): Expired - Lifetime

Application number

US00200008A

Other languages

English (en)

Inventor

H Bellati

W Domer

H Huber

W Rutti

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.)

BBC Brown Boveri AG Switzerland

Original Assignee

Bbc Brown Boveri & Cie

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.)

1970-12-08

Filing date

1971-11-18

Publication date

1973-11-20

1971-11-18 Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie

1973-11-20 Application granted granted Critical

1973-11-20 Publication of US3773431A publication Critical patent/US3773431A/en

1990-11-20 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

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238000003466 welding Methods 0.000 description 2
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230000007547 defect Effects 0.000 description 1
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Images

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
- 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

Definitions

ABSTRACT A multiple shell casing for a turbine operating at high 4 Claims, 3 Drawing Figures MULTIPLE SHELL TURBINE CASING FOR HIGH PRESSURES AND HIGH TEMPERATURES
This invention relates to an improved multiple-shell turbine casing for high pressures and temperatures, consisting of a multi-stage inner casing in the form of a guide blade carrier and split in an axial plane, and an outer casing also split in an axial plane.
the casings of steam turbines for high pressures and temperatures are therefore built in the form of a multiple-shell structure.
the most common form is a double-shell construction consisting of an inner casing which forms the stationary guide blade carrier, and an outer casing which is at a reduced stage pressure or exhaust-steam pressure and at a lower temperature.
the principal object of the present invention is to avoid all the disadvantages mentioned and to make possible turbine casings which satisfy the stated requirements for high pressures and high temperatures, and in so doing keep non-uniform deformation forces of the casing away from the guide blade carrier.
this object is achieved in that an axially divided inner casing which constitutes the guide blade carrier is supported by axially spaced load-bearing rings anchored to a foundation and which also extend through and support an axially divided sheet metal outer casing.
manufacture is simplified by using sheet-metal i.e., rolled metallic sheet for the outer casing as distinguished from castings. This is unaffected by foundry capacity and stresses can more easily be allowed for. Furthermore, by utilizing sheet metal, no attention need be paid to exact matching of the wall thicknesses, for example, between the cylinder endplate and mantle of the outer casing, or at least less attention than with castings, because there are no dangerous casting stresses.
sheet-metal i.e., rolled metallic sheet for the outer casing as distinguished from castings.
FIG. 1 is a vertical central longitudinal section through the turbine structure
FIG. 2 is a section in the axial dividing plane A-A of FIG. 1, and
FIG. 3 is a cross-section taken at line BB of FIG. 1.
FIG. 1 a stationary, guide blade carrier, subsequently denoted as an inner casing 11, is shown somewhat schematically as enclosing a bladed rotor 2 mounted on shaft 26.
Inner casing 11 rests within and is supported by axially spaced load-bearing rings 6 by means of projections 12 on the casing shown in FIG. 2,
the outer casing 3 of the double shell turbine is fabricated from sheet metal parts attached to the loadbearing rings 6 and consisting of welded together endplates 8, bleed-chamber mantle 9, exhaust-steam mantles l0 and a rectangular frame 7 which extends round the axial dividing plane as shown in FIG. 2.
Packing glands 22 for shaft 26 are provided at the pass-through holes provided in endplates 8 and rectangular frame 7 and shaft 26 is supported by free-standing bearing pedestals, which are not shown. Accurate longitudinal guidance of the outer casing is provided by guides 17 in endplates 8. These correspond with guideways in the bearing pedestals.
Stiffening pieces 27 are fixed inside outer casing 3 to endplates 8. These act as deflector plates for the exhaust steam and, together with brace supports 21 also fixed to endplates 8, serve to counteract deformation of the endplate, particularly in the vicinity of the shaftaperture, i.e., packing glands 22.
the outer ends of brace supports 21 are secured to the load-bearing rings 6 so that axial forces exerted by the steam are transmitted from outer casing 3 to the load-bearing rings 6 located in axially spaced radial planes.
Brace supports 21 are also arranged in such manner as to produce a centering effect. It is therefore advantageous to make brace supports 21 adjustable in length, as indicated by coupling sleeves 29.
the bleed-chamber mantle 9 fitted between the two axially spaced load-bearing rings 6 is provided with a thermally variable lead-through 20 for steam inlet pipe 1, consisting essentially of a bellows 30 located between the outer casing 3 and steam inlet 1 which is rigidly connected to the inner casing 11.
the lead-through 20 is shown only schematically and other specific arrangements different from the one depicted are possible.
the rectangular frame 7 provided on the outer, sheet metal casing 3 in the axial dividing plane AA is rigidly connected to the load-bearing rings 6, and is interrupted on the axis of rotation by the packing glands 22, which are also set rigidly in frame 7 and endplate 8.
Adjacent t load-bearing rings 6 is a fixed-point support 14 which transmits the axial forces of inner casing 11 to load-bearing rings 6.
the main purpose of these feet is to transfer the loads of inner casing 11 and outer casing 3 to foundation 16.
FIG. 3 shows a cross-section at line BB of FIG. 1.
load-bearing rings 6 are provided with a fixed part 23 which engages a slot 31 in the inner casing 11 and thus, together with keyways 13 between the inner and outer casings, ensures that a central position is maintained.
the dual casing structure in accordance with the invention is thus seen to be comprised of an outer casing constructed as two all-welded longitudinal halves which are joined together along an axially dividing horizontal plane, each half consisting of a rectangular blade carrier surrounding the turbine rotor is likewise structured as two longitudinal halves 11, ll joined together along the same axially dividing horizontal plane is supported by the load bearing rings, and the loadbearing rings are seated upon the foundation and thus carry the entire load of the dual casing structure.
a multiple shell casing structure for turbines operable at high pressures and high temperatures which comprises an outer casing constructed in the form of two all-welded longitudinal upper and lower halves joined together along an axially dividing horizontal plane, each said casing half being comprised of a rectangular frame, axially spaced radially extending semicircular load bearing ring halves secured to said frame, and a semi-cylindrical jacket half of plate material secured to said ring halves and frame, and an inner casing constituting a guide blade carrier surrounding the turbine rotor, said inner casing being likewise constructed in the form of upper and lower longitudinal halves joined together along the same plane which divides the upper and lower halves of said outer casing, the upper and lower halves of said inner casing being supported by and within said load bearing rings and the load bearing ring halves correlated to the lower half of said outer casing being seatable on a foundation provided for the turbine so as to carry the entire load of the casing structure.
each said semi-cylindrical jacket half includes a semi-cylindrical bleed chamber mantle located between and secured to said axially spaced semi-circular load bearing ring halves, and semi-cylindrical exhaust steam mantles located be tween and secured to each of said bearing ring halves and to semi-circular end plates forming the corresponding end walls of said jacket half.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Turbine Rotor Nozzle Sealing (AREA)

US00200008A 1970-12-08 1971-11-18 Multiple shell turbine casing for high pressures and high temperatures Expired - Lifetime US3773431A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CH1830870A CH524758A (de)	1970-12-08	1970-12-08	Mehrschaliges Turbinengehäuse für hohe Drücke und hohe Temperaturen

Publications (1)

Publication Number	Publication Date
US3773431A true US3773431A (en)	1973-11-20

Family

ID=4432030

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
US00200008A Expired - Lifetime US3773431A (en)	1970-12-08	1971-11-18	Multiple shell turbine casing for high pressures and high temperatures

Country Status (10)

Country	Link
US (1)	US3773431A (de)
AT (1)	AT316592B (de)
AU (1)	AU456315B2 (de)
CA (1)	CA948994A (de)
CH (1)	CH524758A (de)
DE (1)	DE2102771A1 (de)
DK (1)	DK132805C (de)
FR (1)	FR2117426A5 (de)
NL (1)	NL159467B (de)
SE (1)	SE406349B (de)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3880549A (en) *	1973-11-19	1975-04-29	Stork Koninklijke Maschf	Turbine
US3915588A (en) *	1973-10-16	1975-10-28	Bbc Brown Boveri & Cie	Two-shell axial-plane split casing structure for high-capacity low-pressure sections of a steam turbine
US4029432A (en) *	1974-11-18	1977-06-14	Bbc Brown Boveri & Company Limited	Thermal turbomachine
US4326832A (en) *	1978-11-14	1982-04-27	Tokyo Shibaura Denki Kabushiki Kaisha	Exhaust outer casing
US4915581A (en) *	1989-01-03	1990-04-10	Westinghouse Electric Corp.	Steam turbine with improved inner cylinder
US4936002A (en) *	1989-04-03	1990-06-26	Westinghouse Electric Corp.	Method of modifying integral steam chest steam turbines
US5078571A (en) *	1987-12-17	1992-01-07	Bbc Brown Boveri Ag	Multi-cylinder steam turbine
US5149247A (en) *	1989-04-26	1992-09-22	Gec Alsthom Sa	Single hp-mp internal stator for a steam turbine with controlled steam conditioning
US20040175267A1 (en) *	2003-03-03	2004-09-09	Hofer Douglas Carl	Methods and apparatus for assembling turbine engines
US20050106006A1 (en) *	2003-11-15	2005-05-19	Alstom Technology Ltd	Steam turbine and method for the production of such a steam turbine
JP2008240725A (ja) *	2007-03-02	2008-10-09	Alstom Technology Ltd	蒸気タービン
CN102216569A (zh) *	2008-11-13	2011-10-12	西门子公司	用于流体机械的内壳体
US20120207595A1 (en) *	2011-02-11	2012-08-16	Alstom Technology Ltd	Exhaust device for a steam turbine module
US20120282089A1 (en) *	2011-05-05	2012-11-08	General Electric Company	Support arrangement for a steam turbine lp inner casing
JP2016089806A (ja) *	2014-11-11	2016-05-23	三菱日立パワーシステムズ株式会社	蒸気タービン
US20180142573A1 (en) *	2016-11-24	2018-05-24	Kabushiki Kaisha Toshiba	Steam turbine
US10487692B2 (en) *	2016-11-24	2019-11-26	Kabushiki Kaisha Toshiba	Steam turbine
US10677092B2 (en) *	2018-10-26	2020-06-09	General Electric Company	Inner casing cooling passage for double flow turbine
US10746058B2 (en) *	2018-03-06	2020-08-18	Kabushiki Kaisha Toshiba	Steam turbine
US11060414B2 (en) *	2016-10-21	2021-07-13	Mitsubishi Heavy Industries, Ltd.	Steam turbine and steam turbine control method
US11174758B2 (en) *	2019-12-11	2021-11-16	Kabushiki Kaisha Toshiba	Steam turbine
US11352910B2 (en) *	2017-07-03	2022-06-07	Siemens Energy Global GmbH & Co. KG	Steam turbine and method for operating same
US11560812B2 (en)	2018-11-13	2023-01-24	Siemens Energy Global GmbH & Co. KG	Steam turbine and method for operating same
WO2023162412A1 (ja) *	2022-02-22	2023-08-31	三菱重工業株式会社	回転機械の車室支持構造及び回転機械

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1106087A (fr) *	1953-08-21	1955-12-12	Sulzer Ag	Turbine
US2919890A (en) *	1955-09-16	1960-01-05	Gen Electric	Adjustable gas turbine nozzle assembly
GB990543A (en) *	1960-07-20	1965-04-28	Escher Wyss Ag	Improvements in or relating to high-pressure axial-flow machines such as compressorsand turbines
US3594095A (en) *	1968-12-03	1971-07-20	Siemens Ag	Casing for low-pressure stages of steam turbines of completely welded multishell construction

1970
- 1970-12-08 CH CH1830870A patent/CH524758A/de not_active IP Right Cessation
1971
- 1971-01-21 DE DE19712102771 patent/DE2102771A1/de active Pending
- 1971-09-20 AT AT813971A patent/AT316592B/de not_active IP Right Cessation
- 1971-11-04 AU AU35348/71A patent/AU456315B2/en not_active Expired
- 1971-11-18 US US00200008A patent/US3773431A/en not_active Expired - Lifetime
- 1971-11-22 CA CA128,300A patent/CA948994A/en not_active Expired
- 1971-12-06 NL NL7116701.A patent/NL159467B/xx not_active IP Right Cessation
- 1971-12-06 FR FR7143678A patent/FR2117426A5/fr not_active Expired
- 1971-12-06 SE SE7115643A patent/SE406349B/xx unknown
- 1971-12-06 DK DK595871A patent/DK132805C/da active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1106087A (fr) *	1953-08-21	1955-12-12	Sulzer Ag	Turbine
US2919890A (en) *	1955-09-16	1960-01-05	Gen Electric	Adjustable gas turbine nozzle assembly
GB990543A (en) *	1960-07-20	1965-04-28	Escher Wyss Ag	Improvements in or relating to high-pressure axial-flow machines such as compressorsand turbines
US3594095A (en) *	1968-12-03	1971-07-20	Siemens Ag	Casing for low-pressure stages of steam turbines of completely welded multishell construction

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3915588A (en) *	1973-10-16	1975-10-28	Bbc Brown Boveri & Cie	Two-shell axial-plane split casing structure for high-capacity low-pressure sections of a steam turbine
US3880549A (en) *	1973-11-19	1975-04-29	Stork Koninklijke Maschf	Turbine
US4029432A (en) *	1974-11-18	1977-06-14	Bbc Brown Boveri & Company Limited	Thermal turbomachine
US4326832A (en) *	1978-11-14	1982-04-27	Tokyo Shibaura Denki Kabushiki Kaisha	Exhaust outer casing
US5078571A (en) *	1987-12-17	1992-01-07	Bbc Brown Boveri Ag	Multi-cylinder steam turbine
US4915581A (en) *	1989-01-03	1990-04-10	Westinghouse Electric Corp.	Steam turbine with improved inner cylinder
US4936002A (en) *	1989-04-03	1990-06-26	Westinghouse Electric Corp.	Method of modifying integral steam chest steam turbines
US5149247A (en) *	1989-04-26	1992-09-22	Gec Alsthom Sa	Single hp-mp internal stator for a steam turbine with controlled steam conditioning
US20040175267A1 (en) *	2003-03-03	2004-09-09	Hofer Douglas Carl	Methods and apparatus for assembling turbine engines
US6854954B2 (en) *	2003-03-03	2005-02-15	General Electric Company	Methods and apparatus for assembling turbine engines
US20050106006A1 (en) *	2003-11-15	2005-05-19	Alstom Technology Ltd	Steam turbine and method for the production of such a steam turbine
US7165934B2 (en) *	2003-11-15	2007-01-23	Alstom Technology, Ltd.	Steam turbine and method for the production of such a steam turbine
JP2008240725A (ja) *	2007-03-02	2008-10-09	Alstom Technology Ltd	蒸気タービン
CN102216569A (zh) *	2008-11-13	2011-10-12	西门子公司	用于流体机械的内壳体
US20120207595A1 (en) *	2011-02-11	2012-08-16	Alstom Technology Ltd	Exhaust device for a steam turbine module
US9243516B2 (en) *	2011-02-11	2016-01-26	Alstom Technology Ltd	Exhaust device for a steam turbine module
US8821110B2 (en) *	2011-05-05	2014-09-02	General Electric Company	Support arrangement for a steam turbine LP inner casing
US20120282089A1 (en) *	2011-05-05	2012-11-08	General Electric Company	Support arrangement for a steam turbine lp inner casing
JP2016089806A (ja) *	2014-11-11	2016-05-23	三菱日立パワーシステムズ株式会社	蒸気タービン
US11060414B2 (en) *	2016-10-21	2021-07-13	Mitsubishi Heavy Industries, Ltd.	Steam turbine and steam turbine control method
US20180142573A1 (en) *	2016-11-24	2018-05-24	Kabushiki Kaisha Toshiba	Steam turbine
US10487692B2 (en) *	2016-11-24	2019-11-26	Kabushiki Kaisha Toshiba	Steam turbine
US10662817B2 (en) *	2016-11-24	2020-05-26	Kabushiki Kaisha Toshiba	Steam turbine
US11352910B2 (en) *	2017-07-03	2022-06-07	Siemens Energy Global GmbH & Co. KG	Steam turbine and method for operating same
US10746058B2 (en) *	2018-03-06	2020-08-18	Kabushiki Kaisha Toshiba	Steam turbine
US10677092B2 (en) *	2018-10-26	2020-06-09	General Electric Company	Inner casing cooling passage for double flow turbine
US11560812B2 (en)	2018-11-13	2023-01-24	Siemens Energy Global GmbH & Co. KG	Steam turbine and method for operating same
US11174758B2 (en) *	2019-12-11	2021-11-16	Kabushiki Kaisha Toshiba	Steam turbine
WO2023162412A1 (ja) *	2022-02-22	2023-08-31	三菱重工業株式会社	回転機械の車室支持構造及び回転機械
JPWO2023162412A1 (de) *	2022-02-22	2023-08-31
US20240352874A1 (en) *	2022-02-22	2024-10-24	Mitsubishi Heavy Industries, Ltd.	Rotating-machine casing support structure and rotating machine
JP7665092B2 (ja)	2022-02-22	2025-04-18	三菱重工業株式会社	回転機械の車室支持構造及び回転機械
US12372012B2 (en) *	2022-02-22	2025-07-29	Mitsubishi Heavy Industries, Ltd.	Rotating-machine casing support structure and rotating machine

Also Published As

Publication number	Publication date
SE406349B (sv)	1979-02-05
AU3534871A (en)	1973-05-10
FR2117426A5 (de)	1972-07-21
DK132805B (da)	1976-02-09
CH524758A (de)	1972-06-30
AU456315B2 (en)	1974-12-12
CA948994A (en)	1974-06-11
DK132805C (da)	1976-07-12
DE2102771A1 (de)	1972-06-29
NL159467B (nl)	1979-02-15
AT316592B (de)	1974-07-25
NL7116701A (de)	1972-06-12

Publication	Publication Date	Title
US3773431A (en)	1973-11-20	Multiple shell turbine casing for high pressures and high temperatures
US3746463A (en)	1973-07-17	Multi-casing turbine
US4362464A (en)	1982-12-07	Turbine cylinder-seal system
US5483792A (en)	1996-01-16	Turbine frame stiffening rails
US8870526B2 (en)	2014-10-28	Axially segmented guide vane mount for a gas turbine
EP2828487B1 (de)	2017-12-06	Niederdruck-dichtungsanordnungen für dampfturbine
US3314648A (en)	1967-04-18	Stator vane assembly
US4078812A (en)	1978-03-14	Combined seal and guide arrangement for two coaxially arranged machine parts
US2497041A (en)	1950-02-07	Nozzle ring for gas turbines
US4102598A (en)	1978-07-25	Single case low pressure turbine
US20080213091A1 (en)	2008-09-04	Steam Turbine
US7165934B2 (en)	2007-01-23	Steam turbine and method for the production of such a steam turbine
US4487014A (en)	1984-12-11	Gas generator and turbine unit
US2815645A (en)	1957-12-10	Super-critical pressure elastic fluid turbine
GB2114234A (en)	1983-08-17	Stator vane structure
US3166295A (en)	1965-01-19	Guide wheel for condensing turbines of great and greatest power
US3843281A (en)	1974-10-22	Casing of a fluid flow machine
JPH0457849B2 (de)	1992-09-14
US2304994A (en)	1942-12-15	Turbine cylinder cooling
US3915588A (en)	1975-10-28	Two-shell axial-plane split casing structure for high-capacity low-pressure sections of a steam turbine
GB1427217A (en)	1976-03-10	Nuclear reactor installations tool-free detachable connectors for electric power conduits
US3689174A (en)	1972-09-05	Axial flow turbine structure
US2996280A (en)	1961-08-15	Heat shield
US20130078088A1 (en)	2013-03-28	Steam turbine lp casing cylindrical struts between stages
US3832087A (en)	1974-08-27	Axial turbine combined with reverse turbine