EP0056171B1 - Fixing device for a tubine casing - Google Patents

Fixing device for a tubine casing Download PDF

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Publication number
EP0056171B1
EP0056171B1 EP81201328A EP81201328A EP0056171B1 EP 0056171 B1 EP0056171 B1 EP 0056171B1 EP 81201328 A EP81201328 A EP 81201328A EP 81201328 A EP81201328 A EP 81201328A EP 0056171 B1 EP0056171 B1 EP 0056171B1
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EP
European Patent Office
Prior art keywords
support
foundation
housing
turbine housing
turbine
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.)
Expired
Application number
EP81201328A
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German (de)
French (fr)
Other versions
EP0056171A1 (en
Inventor
Hans Bellati
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
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BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0056171A1 publication Critical patent/EP0056171A1/en
Application granted granted Critical
Publication of EP0056171B1 publication Critical patent/EP0056171B1/en
Expired 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
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • F01D25/162—Bearing supports
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S248/00—Supports
    • Y10S248/901—Support having temperature or pressure responsive feature

Definitions

  • the present invention relates to the attachment of a turbine housing to foundation crossbars and to the bearing housing.
  • a fastening device for a turbine housing in which a claw of the turbine housing is mounted on a support surface of the bearing housing on the transverse foundation bar and on the bearing housing and at least one support rib is provided on the turbine housing and the support rib is provided with a support and a holder the foundation crossbar is rigidly connected in the axial direction.
  • a turbine attachment has become known, in which the turbine housing has claws, which are slidably mounted on the bearing blocks and are fixed in the axial direction via a bracket.
  • the fixed point i. H. the point at which the axial loads act on the bearing housing at the level of the shaft train.
  • This can result in an inadmissibly high torsional stress on the transom.
  • the tipping movements and the play on the shaft seals can also be changed by the tilting movements associated therewith in such a way that a streak of the blading and thus an uneven running of the shaft train occur.
  • the axial forces which act on the attachment particularly in the case of steam turbines with a high output, also increase due to the action forces of the steam lines connected to the turbine housing and the increased friction when the housing expands due to their ever greater weights.
  • the spatial conditions For example, between the medium-pressure and low-pressure parts of the turbine are narrow by design, there is a limit to a correspondingly larger dimensioning of the crossbar of the foundation.
  • the axial adjustability of the pendulum supports via eccentric bushes enables fine adjustment without play.
  • 1, 1 denotes a housing of a turbine, the shaft 2 of which is mounted in a bearing housing 3.
  • At least one support rib 4 is arranged on the lower part of the turbine housing 1, while a claw 5 is provided on the upper part, which is axially movably mounted on a bearing surface 6 of the bearing housing 3.
  • the bearing housing 3 is mounted on a foundation crossbar 9 via adjustment bolts 7 and a foundation plate 8, the adjustment bolts 7 serving for height adjustment.
  • a pendulum support 10 is arranged, which is attached to a bracket 11.
  • the bracket 11 is in turn fixed by means of retaining bolts 12, which penetrate the foundation cross bar 9, by means of adjusting screws 13 for coarse axial adjustment.
  • the pendulum support 10 With the pendulum support 10 shown in FIG. 2, the distance between the turbine housing 1 and the foundation crossbeam 9 can be fine-tuned according to the eccentric principle.
  • the pendulum support 10 has two eccentric bushes 14, 14 ', which are connected to one another via a spindle 15 and a nut 16 with a cylindrical pin 17.
  • the pendulum support 10 itself points to its bearings surfaces on the spindle 15 conical ends 19, 19 ', whereby only a part D rests on the spindle 15, and thus greater mobility of the pendulum support 10 is achieved.
  • pressure plates 20 are arranged on the foundation crossbar 9, on which set screws 21 with spherically shaped engagement surfaces 22 rest.
  • the set screws 21 are rotatably arranged in threaded bores 23 of the holder 11, so that a rough adjustment of the fixed point can thus be carried out.
  • the holder 11 is fixed in its position by means of the retaining bolts 12 and nuts 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Sliding-Contact Bearings (AREA)

Description

Die vorliegende Erfindung betrifft die Befestigung eines Turbinengehäuses an Fundament-Querriegeln und am Lagergehäuse.The present invention relates to the attachment of a turbine housing to foundation crossbars and to the bearing housing.

Bei der üblichen Bauweise von Turbinen ist eine Befestigungsvorrichtung für ein Turbinengehäuse bekannt geworden, bei welchem am Fundamentquerriegel und am Lagergehäuse eine Pratze des Turbinengehäuses auf einer Auflagefläche des Lagergehäuses gelagert ist und am Turbinengehäuse mindestens eine Stützrippe vorgesehen und die Stützrippe über eine Stütze und eine Halterung mit dem Fundament-Querriegel in Axialrichtung starr verbunden ist. (Kraft « Die neuzeitliche Dampfturbine », Berlin 1954, Bild 271).In the customary construction of turbines, a fastening device for a turbine housing has become known, in which a claw of the turbine housing is mounted on a support surface of the bearing housing on the transverse foundation bar and on the bearing housing and at least one support rib is provided on the turbine housing and the support rib is provided with a support and a holder the foundation crossbar is rigidly connected in the axial direction. (Kraft «The modern steam turbine», Berlin 1954, picture 271).

Weiterhin ist aus der FR-A-1.322.074 eine Turbinenbefestigung bekannt geworden, bei welcher das Turbinengehäuse Pratzen aufweist, die auf den Lagerböcken gleitend gelagert und in axialer Richtung über eine Lasche fixiert sind.Furthermore, from FR-A-1.322.074 a turbine attachment has become known, in which the turbine housing has claws, which are slidably mounted on the bearing blocks and are fixed in the axial direction via a bracket.

Eine weitere bekannte Turbinengehäuse-Befestigung (US-A-2.992.809) weist eine Anordnung des Axiallagers mittels Gelenkstangen auf, die durch Bolzen am Turbinengehäuse befestigt sind. Die Abstände zwischen dem Turbinengehäuse und dem Axiallagergehäuse sind durch Exzenterbolzen beidseitig einstellbar.Another known turbine housing attachment (US-A-2,992,809) has an arrangement of the axial bearing by means of articulated rods which are fastened to the turbine housing by bolts. The distances between the turbine housing and the thrust bearing housing can be adjusted on both sides by means of eccentric bolts.

Bei derartigen bekannten Befestigungsarten liegt der Fixpunkt, d. h. der Punkt, in welchem die axialen Beanspruchungen am Lagergehäuse angreifen, in Höhe des Wellenstranges. Dadurch kann eine unzulässig hohe Torsionsbeanspruchung des Querriegels auftreten. Auch können durch die damit verbundenen Kippbewegungen die Schaufelspiele und das Spiel an den Wellendichtungen so verändert werden, dass ein Streifen der Beschaufelung und dadurch ein unruhiger Lauf des Wellenstranges eintritt. Ausserdem nehmen die Axialkräfte, welche auf die Befestigung, insbesondere bei Dampfturbinen grosser' Leistung, durch die Aktionskräfte der an das Turbinengehäuse angeschlossenen Dampfleitungen und die erhöhte Reibung bei Dehnungen der Gehäuse durch deren immer grösseren Gewichte ebenfalls zu. Da jedoch die Raumverhältnisse . beispielsweise zwischen Mitteldruck- und Niederdruckteil der Turbine konstruktionsbedingt eng sind, ist einer entsprechenden grösseren Dimensionierung des Querriegels des Fundamentes eine Grenze gesetzt.In such known types of attachment, the fixed point, i. H. the point at which the axial loads act on the bearing housing at the level of the shaft train. This can result in an inadmissibly high torsional stress on the transom. The tipping movements and the play on the shaft seals can also be changed by the tilting movements associated therewith in such a way that a streak of the blading and thus an uneven running of the shaft train occur. In addition, the axial forces which act on the attachment, particularly in the case of steam turbines with a high output, also increase due to the action forces of the steam lines connected to the turbine housing and the increased friction when the housing expands due to their ever greater weights. However, because of the spatial conditions. For example, between the medium-pressure and low-pressure parts of the turbine are narrow by design, there is a limit to a correspondingly larger dimensioning of the crossbar of the foundation.

Es ist daher Aufgabe der vorliegenden Erfindung, den Fixpunkt für die stillstehenden Teile einer Turbine so zu verlagern, dass eine hohe Torsionsbeanspruchung des Fundament-Querriegels und damit eine unzulässige Bewegung des Lagergehäuses am Punkt der Auflagerung vermieden werden.It is therefore an object of the present invention to shift the fixed point for the stationary parts of a turbine in such a way that a high torsional stress on the foundation crossbeam and thus an inadmissible movement of the bearing housing at the point of support are avoided.

Die vorgenannte Aufgabe wird durch die kennzeichnenden Merkmale des Patentanspruches gelöst.The above object is achieved by the characterizing features of the claim.

Durch die erfindungsgemässe Befestigung des Turbinengehäuses über Stützrippen und als Pendelstützen ausgebildete Verbindungsstützen können konstruktiv schwierige und aufwendige Aenderungen am Fundament-Querriegel vermieden werden und es wird ausserdem durch auftretende Kippbewegungen des Fundament-Querriegels mit dem daran befestigten Lagergehäuse ein einseitiges Anheben des Turbinengehäuses verhindert.By fastening the turbine housing according to the invention via support ribs and connecting supports designed as pendulum supports, structurally difficult and complex changes to the foundation crossbeam can be avoided, and tilting movements of the foundation crossbolt with the bearing housing attached to it also prevent the turbine housing from being lifted on one side.

Die axiale Verstellbarkeit der Pendelstützen über Exzenterbüchsen ermöglicht eine spiellose Feineinstellung.The axial adjustability of the pendulum supports via eccentric bushes enables fine adjustment without play.

Ferner kann durch die Anordnung von Stellschrauben am Fundament-Querriegel bei der Montage eine einfache Einstellung des Fixpunktes erfolgen.Furthermore, a simple adjustment of the fixed point can be made by the arrangement of set screws on the foundation crossbar during assembly.

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes vereinfacht dargestellt.In the drawing, an embodiment of the subject matter of the invention is shown in simplified form.

Es zeigt :

  • Figur 1 eine Seitenansicht der erfindungsgemässen Befestigung des Turbinen- und Lagergehäuses am Fundament-Querriegel,
  • Figur 2 einen Längsschnitt durch eine Pendelstütze,
  • Figur 3 ein Detail der Grobeinstellung am Fundament-Querriegel, in vergrössertem Masstab.
It shows :
  • FIG. 1 shows a side view of the fastening of the turbine and bearing housing according to the invention to the crossbeam foundation,
  • FIG. 2 shows a longitudinal section through a pendulum support,
  • Figure 3 shows a detail of the rough setting on the foundation crossbar, on an enlarged scale.

Gemäss Fig. 1 ist mit 1 ein Gehäuse einer Turbine bezeichnet, deren Welle 2 in einem Lagergehäuse 3 gelagert ist. Am unteren Teil des Turbinengehäuses 1 ist mindestens eine Stützrippe 4 angeordnet, während am Oberteil eine Pratze 5 vorgesehen ist, welche auf einer Auflagerfläche 6 des Lagergehäuses 3 axial beweglich gelagert ist. Das Lagergehäuse 3 ist über Einstellbolzen 7 und eine Fundamentplatte 8 auf einem Fundament-Querriegel 9 gelagert, wobei die Einstellbolzen 7 zur Höheneinstellung dienen. Zwischen der Stützrippe 4 und dem Fundament- Querriegel 9 ist eine Pendelstütze 10 angeordnet, welche an einer Halterung 11 befestigt ist. Die Halterung 11 ist wiederum mittels Haltebolzen 12, welche den Fundament-Querriegel 9 durchdringen, an diesem über Einstellschrauben 13 zur axialen Grobeinstellung fixiert.1, 1 denotes a housing of a turbine, the shaft 2 of which is mounted in a bearing housing 3. At least one support rib 4 is arranged on the lower part of the turbine housing 1, while a claw 5 is provided on the upper part, which is axially movably mounted on a bearing surface 6 of the bearing housing 3. The bearing housing 3 is mounted on a foundation crossbar 9 via adjustment bolts 7 and a foundation plate 8, the adjustment bolts 7 serving for height adjustment. Between the support rib 4 and the foundation cross bar 9, a pendulum support 10 is arranged, which is attached to a bracket 11. The bracket 11 is in turn fixed by means of retaining bolts 12, which penetrate the foundation cross bar 9, by means of adjusting screws 13 for coarse axial adjustment.

Mit der in Fig. 2 dargestellten Pendelstütze 10 kann nach dem Exzenterprinzip eine Feineinstellung des Abstandes zwischen dem Turbinengehäuse 1 und dem Fundament-Querriegel 9 erfolgen. Dazu weist die Pendelstütze 10 zwei Exzenterbüchsen 14, 14' auf, welche über eine Spindel 15 und eine Mutter 16 mit einem Zylinderstift 17 miteinander verbunden sind. Die Exzenterbüchsen 14,14' sind in der Halterung 11 unbeweglich gelagert. Die Durchmesser a, b der Exzenterbüchsen 14, 14' sind durch die Exzentrizität E desachsiert. Nach erfolgter Feineinstellung durch Drehen der Exzenterbüchsen 14, 14' mittels der Mutter 16, kann deren Lage durch eine Fixierschraube 18 gesichert werden. Die Pendelstütze 10 selbst weist an ihren Lagerflächen auf der Spindel 15 konische Enden 19, 19' auf, wodurch nur ein Teil D auf der Spindel 15 aufliegt, und damit eine grössere Beweglichkeit der Pendelstütze 10 erreicht wird.With the pendulum support 10 shown in FIG. 2, the distance between the turbine housing 1 and the foundation crossbeam 9 can be fine-tuned according to the eccentric principle. For this purpose, the pendulum support 10 has two eccentric bushes 14, 14 ', which are connected to one another via a spindle 15 and a nut 16 with a cylindrical pin 17. The eccentric bushes 14, 14 'are immovably mounted in the holder 11. The diameters a, b of the eccentric bushes 14, 14 'are decachated by the eccentricity E. After fine adjustment by turning the eccentric bushes 14, 14 'by means of the nut 16, their position can be secured by a fixing screw 18. The pendulum support 10 itself points to its bearings surfaces on the spindle 15 conical ends 19, 19 ', whereby only a part D rests on the spindle 15, and thus greater mobility of the pendulum support 10 is achieved.

In der Detailansicht der Grobeinstellung am Fundament-Querriegel 9 gemäss der Fig. 3 sind Druckplatten 20 am Fundament-Querriegel 9 angeordnet, auf welchen Stellschrauben 21 mit sphärisch ausgebildeten Angriffsflächen 22 aufliegen. Die Stellschrauben 21 sind in Gewindebohrungen 23 der Halterung 11 verdrehbar angeordnet, so dass damit eine Grobeinstellung des Fixpunktes vorgenommen werden kann. Nach dieser Grobeinstellung wird die Halterung 11 mittels der Haltebolzen 12 und Muttern 24 in ihrer Lage fixiert.In the detailed view of the rough adjustment on the foundation crossbar 9 according to FIG. 3, pressure plates 20 are arranged on the foundation crossbar 9, on which set screws 21 with spherically shaped engagement surfaces 22 rest. The set screws 21 are rotatably arranged in threaded bores 23 of the holder 11, so that a rough adjustment of the fixed point can thus be carried out. After this rough adjustment, the holder 11 is fixed in its position by means of the retaining bolts 12 and nuts 24.

Durch die erfindungsgemässe Befestigung des Turbinengehäuses 1 am Fundament-Querriegel 9 ist es schon bei der Montage der Anlage auf einfache Weise möglich, den Fixpunkt einzustellen.Due to the fastening of the turbine housing 1 to the foundation cross bar 9 according to the invention, it is already possible to set the fixed point in a simple manner when the system is being installed.

Claims (1)

  1. Securing fixture for a turbine housing on the foundation cross bracket (9) and on the bearing housing (3), a claw (5) of the turbine housing (1) being borne so that it is axially movable on a support surface (6) of the bearing housing (3) and at least one support rib (4) with connection support being provided on the turbine housing (1), characterised in that the support rib (4) is rigidly connected in axial direction to the foundation cross bracket (9) via the connection support designed as a hinged support (10) and a mount (11) and the hinged support (10) is axially adjustable via an eccentric bush (14, 14'), and in that setting screws (21) are arranged on the mount (11) on the foundation cross bracket (9).
EP81201328A 1981-01-14 1981-12-07 Fixing device for a tubine casing Expired EP0056171B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH21281 1981-01-14
CH212/81 1981-01-14

Publications (2)

Publication Number Publication Date
EP0056171A1 EP0056171A1 (en) 1982-07-21
EP0056171B1 true EP0056171B1 (en) 1985-10-30

Family

ID=4181821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81201328A Expired EP0056171B1 (en) 1981-01-14 1981-12-07 Fixing device for a tubine casing

Country Status (4)

Country Link
US (1) US4456426A (en)
EP (1) EP0056171B1 (en)
CA (1) CA1190861A (en)
DE (2) DE3105509A1 (en)

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Publication number Priority date Publication date Assignee Title
DE3522917A1 (en) * 1985-06-27 1987-01-08 Kraftwerk Union Ag BEARING ARRANGEMENT FOR TURBO MACHINES, ESPECIALLY STEAM TURBINES
FR2595769B1 (en) * 1986-03-12 1988-06-03 Neyrpic STOP DEVICE FOR SPIRAL SHEETS OF HYDRAULIC TURBINES AND SIMILAR MACHINES
US4759262A (en) * 1987-05-11 1988-07-26 The Dow Chemical Company Apparatus for restraining rotary motion of a motor component
US5051061A (en) * 1988-12-23 1991-09-24 Asea Brown Boveri Ltd. Multi-cylinder steam turbine set
US5104289A (en) * 1990-10-25 1992-04-14 Westinghouse Electric Corp. Turbine having support arrangement for minimizing humping
US5271217A (en) * 1992-12-09 1993-12-21 General Electric Company Mounting arrangement for a single shaft combined cycle system
US5509782A (en) * 1995-03-02 1996-04-23 Dresser-Rand Company Bearing case support
US20110016881A1 (en) * 2009-07-21 2011-01-27 Jose Luis Ruiz Gas turbine with exhaust gas casing and method for producing a gas turbine
US20120195752A1 (en) * 2011-02-01 2012-08-02 General Electric Company Stiffening system for steam turbine casing
US9157335B2 (en) 2012-03-27 2015-10-13 General Electric Company Side supported turbine shell
RU2648477C2 (en) * 2015-08-03 2018-03-26 Андрей Витальевич Билан Connection of cylinder bodies and steam turbine bearings (versions)

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US1416760A (en) * 1920-07-03 1922-05-23 Gen Electric Elastic-fluid turbine or turbine-driven unit
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Non-Patent Citations (1)

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Title
Kraft "Die neuzeitliche Dampfturbine", Berlin 1954, Bild 271 *

Also Published As

Publication number Publication date
EP0056171A1 (en) 1982-07-21
US4456426A (en) 1984-06-26
CA1190861A (en) 1985-07-23
DE3172785D1 (en) 1985-12-05
DE3105509A1 (en) 1982-08-05

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