EP1806481A1 - Turbine à vapeur ayant des éléments de guidage - Google Patents

Turbine à vapeur ayant des éléments de guidage Download PDF

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Publication number
EP1806481A1
EP1806481A1 EP06000348A EP06000348A EP1806481A1 EP 1806481 A1 EP1806481 A1 EP 1806481A1 EP 06000348 A EP06000348 A EP 06000348A EP 06000348 A EP06000348 A EP 06000348A EP 1806481 A1 EP1806481 A1 EP 1806481A1
Authority
EP
European Patent Office
Prior art keywords
steam turbine
flow
diffuser
flow guide
fiber composite
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.)
Granted
Application number
EP06000348A
Other languages
German (de)
English (en)
Other versions
EP1806481B1 (fr
Inventor
Christian Ruwe
Norbert Sürken
Jan Dr. Walkenhorst
Max Wiesenberger
Armin Dr. De Lazzer
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 EP06000348.0A priority Critical patent/EP1806481B1/fr
Publication of EP1806481A1 publication Critical patent/EP1806481A1/fr
Application granted granted Critical
Publication of EP1806481B1 publication Critical patent/EP1806481B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01D25/30—Exhaust heads, chambers, or the like
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved
    • 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
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2102—Glass
    • 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
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/224—Carbon, e.g. graphite
    • 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
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F05D2300/433—Polyamides, e.g. NYLON
    • 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
    • F05D2300/40—Organic materials
    • F05D2300/44—Resins
    • 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
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced
    • 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
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/614—Fibres or filaments
    • 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
    • F05D2300/70—Treatment or modification of materials
    • F05D2300/702—Reinforcement

Definitions

  • the invention relates to a steam turbine with Strörnungs arrangementen.
  • flow guides in the context of the invention are all fittings to understand which affect the direction of flow, for example, redirect the flow or change the velocity vector of the flow.
  • flow guides can change both the direction of the flow or that of the local velocity vector and the flow velocity, as is the case, for example, with a nozzle or a diffuser.
  • the invention has made it its task to make flow control in a steam turbine more cost-effective and still have to accept no loss in the life of these components.
  • the invention proposes a steam turbine with the features of claim 1.
  • the dependent claims include advantageous developments of the invention, wherein the invention also covers such embodiments that are not claimed by explicit references as a combination of features.
  • a decisive advantage of the steam turbine according to the invention with flow guidance is that the density of fiber composite material is substantially lower than that of the previously used steel, whereby the overall structure of the turbine housing is relieved.
  • the reduction of the total mass according to the invention relieves the overall structure of the door box housing, so that the supporting components of the housing and the foundations as well as the lifting gear provided in the machine house can be dimensioned smaller.
  • flow-optimized contours can be produced with significantly less effort from the fiber composite material, which leads directly to an increase in efficiency of the turbo set.
  • the outer casing of steam turbines is previously characterized by unfavorable corners and edges, so that an arrangement of the flow guides according to the invention in the outer casing is appropriate.
  • Steam turbines in particular low-pressure steam turbines, which regularly discharge into a condenser, naturally have a diffuser in the region of the outflow from the blading into the outer housing or the condenser, in which the flow is braked.
  • the flow is conducted by means of a first flow guide, which surrounds the outflow concentric to the rotor axis and widens in the flow direction, wherein preferably a convex widening towards the rotor axis is provided.
  • a conical second flow guide is arranged concentrically to the rotor axis and to the first flow guide.
  • the second flow guide is in this case preferably concave toward the flow and has substantially the shape of a rotating body of a rotation body concave about the rotor axis of a bow concave to the blading channel.
  • the first flow guide is flowed substantially on the inner diameter - comparable to the end of a trumpet - and the second flow guide is substantially flows laterally in the manner of a funnel-shaped damper or fitting, which with its tapered end in the end of the trumpet or points into the blading.
  • the two flow guides together form the diffuser.
  • At least one of the two components, preferably both according to the invention consist of fiber composites.
  • the use of the fiber composite material opens up the possibility that, in particular, the second flow guide advantageously has a continuous course of curvature. This can be better adapted according to the invention than the conventional welded construction to minimize the flow losses. In this case, complicated three-dimensional designs can be selected that optimally guide the flow.
  • a diffuser in the region of an outflow from the blading, it is expedient if it has components that are arranged completely or at least parts that are essentially concentric to the rotor axis.
  • it is particularly useful in terms of assembly when the diffuser is divided in the circumferential direction about the rotor axis of the steam turbine in preferably at least partially identical segments. In this way, a small series production enables the development of further cost reduction potentials. With a sufficient number of segments, for example at 6 or 8 segments over the circumference, an automated production by means of an autoclave can be realized inexpensively.
  • a segmentation in two half-shells leads to a relatively simple handling of the invention designed in lightweight diffuser. Even a one-piece complete part represents a significant relief over the prior art.
  • a low-pressure turbine part is shown, wherein on the left side of the illustration, the outflow is designed in a conventional manner and on the right side, the flow guides 2a, 2b are provided.
  • the low-pressure steam turbine 1 to be operated has a bladed rotor 3, which is mounted in two bearing blocks 4.
  • the steam flows through an inflow 5 in the blading 6 and exits through an outflow 7 from this.
  • the entire steam turbine 1 is surrounded by an outer housing 8, which forms a continuous component together with a capacitor, not shown, below the steam turbine 1.
  • the welded construction of the outer housing 8 requires several edges 9, at which the steam flow forms lossy vortex.
  • flow guides 2a, 2b according to the invention which are each part of a diffuser 13, are shown in the region of the outflow 7 located on the right-hand side.
  • the first flow guide 2a is formed with respect to the rotor axis 10 is substantially rotationally symmetrical and supports the deflection of the flow radially outward. It is made according to the invention of fiber composite material and mounted in the outer housing 8.
  • the first flow guide 2a has substantially the shape of a rotating about the rotor axis 10 of the rotor 3 rotating body, where it is formed as a convex arc 6 to the blading 6.
  • the second flow guide 2b has substantially the shape of a rotating about the rotor axis 10 of the rotor 3 rotational body, wherein it is concave to the blading 6. For an ideal body of revolution exist in the illustrated embodiment, deviations in the way that the most distant from the center curvature of the arc is provided only in the upper part of the outer housing 8.
  • a variant of the flow guide 2b according to the invention on the outer housing 8 is shown in dashed lines in Figure 1.
  • a compensator 14 surrounding the rotor 3 can be replaced by means of a flexible membrane section 20, the second flow guide 2b according to the invention then sealing directly with a seal to the rotor 3 Shaft seal 15 is connected.
  • the second flow guide 2b is in this case supported to a first part 21 of the total extension of the outer housing 8 and a second part 22, which lies in the region of the shaft seal 15, can move within its own elasticity, so that thermal relative expansion at the connection of the outer housing 8 are compensated for the shaft seal 15.
  • Both the first and the second flow guide 2a, 2b consist in the manner shown in Figure 2 of circumferentially joined together segments 30th
  • the solution according to the invention can also be used advantageously in conjunction with a lateral instead of with a discharge into an under-turbine condenser, as shown in the embodiment find.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP06000348.0A 2006-01-09 2006-01-09 Turbine à vapeur ayant des éléments de guidage Ceased EP1806481B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06000348.0A EP1806481B1 (fr) 2006-01-09 2006-01-09 Turbine à vapeur ayant des éléments de guidage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06000348.0A EP1806481B1 (fr) 2006-01-09 2006-01-09 Turbine à vapeur ayant des éléments de guidage

Publications (2)

Publication Number Publication Date
EP1806481A1 true EP1806481A1 (fr) 2007-07-11
EP1806481B1 EP1806481B1 (fr) 2013-12-18

Family

ID=36602562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06000348.0A Ceased EP1806481B1 (fr) 2006-01-09 2006-01-09 Turbine à vapeur ayant des éléments de guidage

Country Status (1)

Country Link
EP (1) EP1806481B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522916A1 (de) 1985-06-27 1987-01-08 Kraftwerk Union Ag Turbosatz mit wenigstens einer, ein aussengehaeuse und ein dazu koaxiales innengehaeuse aufweisenden niederdruck-teilturbine und mit hochdruck- und/oder mitteldruck-teilturbine
US6257366B1 (en) * 1995-09-13 2001-07-10 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Exhaust device for a turbine engine
WO2002027169A1 (fr) * 2000-09-29 2002-04-04 Turbec Ab Dispositif de connexion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522916A1 (de) 1985-06-27 1987-01-08 Kraftwerk Union Ag Turbosatz mit wenigstens einer, ein aussengehaeuse und ein dazu koaxiales innengehaeuse aufweisenden niederdruck-teilturbine und mit hochdruck- und/oder mitteldruck-teilturbine
US6257366B1 (en) * 1995-09-13 2001-07-10 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Exhaust device for a turbine engine
WO2002027169A1 (fr) * 2000-09-29 2002-04-04 Turbec Ab Dispositif de connexion

Also Published As

Publication number Publication date
EP1806481B1 (fr) 2013-12-18

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