EP2992253A1 - Système de joint à brosses - Google Patents

Système de joint à brosses

Info

Publication number
EP2992253A1
EP2992253A1 EP14741233.2A EP14741233A EP2992253A1 EP 2992253 A1 EP2992253 A1 EP 2992253A1 EP 14741233 A EP14741233 A EP 14741233A EP 2992253 A1 EP2992253 A1 EP 2992253A1
Authority
EP
European Patent Office
Prior art keywords
rotor
brush
brush seal
sealing surface
bristles
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.)
Ceased
Application number
EP14741233.2A
Other languages
German (de)
English (en)
Inventor
Andreas Hofmann
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
Publication of EP2992253A1 publication Critical patent/EP2992253A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • F16J15/3288—Filamentary structures, e.g. brush seals
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/025—Seal clearance control; Floating assembly; Adaptation means to differential thermal dilatations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4472—Labyrinth packings with axial path
    • 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
    • F05D2240/00—Components
    • F05D2240/55—Seals
    • F05D2240/56—Brush seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings

Definitions

  • the invention relates to a brush seal arrangement for sealing a gap between a rotor and a stator according to the preamble of independent claim 1.
  • the invention further relates to a rotary machine, in particular a steam turbine according to independent patent claim 3.
  • Brush seals have the task of sealing the gap between a rotor and a stator, thus keeping the leakage of process fluid through the gap between rotor and stator as low as possible.
  • the brush seal has a brush housing and a multiplicity of bristles fastened in brush housings. The bristles protrude from the brush housing and support with their free end against a sealing surface on the rotor.
  • the bristles of the bristle seal are permanently supported against the sealing surface on the rotor, or a local application of the free ends of the brush seal to the sealing surface of the rotor occurs only during radial movement of the rotor during operation.
  • Brush seals are used in particular for balancing pistons and in the blading path of steam turbines.
  • the object of the invention is to provide a brush seal which excludes the risk of spiral vibrations or at least significantly reduced. Furthermore, it is Be the invention to provide a steam turbine with such a brush seal.
  • the invention is achieved with respect to the brush seal assembly by the features of independent claim 1 and with respect to the rotary machine by the features of independent claim 3.
  • the brush seal assembly of the invention for sealing a gap between a rotor and a stator comprising at least one brush seal having a brush housing and a plurality of bristles mounted in brush housings, the free ends of the bristles being supported against a sealing surface on the rotor, is characterized in that the rotor in the axial direction in front of and behind the sealing surface, radially encircling relief grooves are provided so that in the region of the sealing surface, a web is formed, which deform, especially when a brushing of the brush housing on the sealing surface locally can. Due to the local deformation of the web, a curvature of the rotor is largely avoided, whereby dangerous spiral vibrations can be largely avoided.
  • multiple brush seals are preferably arranged axially one behind the other.
  • the rotary machine according to the invention in particular steam turbine, is characterized in that the rotary machine ne comprises a brush seal assembly according to one of the preceding claims. Due to the use of the erfindungsmä field brush seal arrangement, the risk of curvature of the rotor and thus the formation of dangerous spiral vibrations is avoided or at least greatly reduced. As a result, the safety of the use of brush seals in rotary machine, such as steam turbines, gas turbine and compressors, significantly increased. An embodiment of the invention will be explained below with reference to FIGS.
  • FIG. 1 shows a brush seal arrangement according to the invention.
  • the brush seal assembly comprises three radially arranged behind one another brush seals 9, which in a
  • Stator 3 are arranged.
  • the stator 3 is, for example, the housing of a steam turbine.
  • Each brush seal 9 comprises a brush housing 4 in which a plurality of bristles 5 fastened in the brush housing 4 are arranged. The free ends of the bristles 5, which protrude from the brush housing 4, are supported against a sealing surface 6 on the rotor 2. As a result, the gap 1 between the rotor 2 and the steam turbine housing 3 is sealed.
  • the brush seal 9 may be formed so that the bristles 5 are permanently supported on the sealing surface 6 on the rotor 2 or it comes only at a radial deflection of the rotor 2 to a rubbing of the bristles 5 on the sealing surface 6.
  • the rotor 2 is designed so that a radially circumferential relief groove 7 is provided in front of and behind each sealing surface 6 so that a web 8 is formed in the region of the sealing surface 6 which can deform on the web 8 when loaded.
  • the local deformation of the webs 8 is shown in FIG. Due to a radial strong deflection of the rotor 2, there is a brushing of the brush seal 9 on the sealing surfaces 6, whereby locally very high temperatures. As a result, the webs 8 are deformed locally and substantially elastically. Due to the elastic deformation in the region of the webs 8 is a curvature of the rotor 2 effectively prevented. The curvature of the gate 2 would favor the emergence dangerous spiral oscillations.
  • the brush seal assembly according to the invention thus ensures a much safer operation of the steam turbine.
  • the brush seal can be used in particular for the shaft area in the steam turbine. Depending on the width and depth of the groove in the rotor, the possibility of the web for local deformation can be influenced.
  • the brush seal arrangement according to the invention minimizes the risk of spiral vibrations in rotors prone to bending, in rotary machines, such as in steam turbines, gas turbines or compressors.
  • the design of the brush seal assembly according to the invention is structurally very simple and inexpensive.

Landscapes

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

Abstract

L'invention concerne un système de joint à brosses destiné à réaliser l'étanchéité au niveau d'une fente (1) ménagée entre un rotor (2) et un stator (3). Le joint à brosses (9) comprend un boîtier (4) et une pluralité de brosses (5) fixées dans le boîtier (4). Les extrémités libres des brosses (5) s'appuient contre une surface d'étanchéité (6) au niveau du rotor (2). Des gorges de décharge (7) qui s'étendent radialement en avant et en arrière de la surface d'étanchéité (6) par référence à la direction axiale sont ménagées au niveau du rotor (2) de façon à former dans la zone des surfaces d'étanchéité (6) une nervure (8) qui peut se déformer localement, en particulier pendant l'effleurement du boîtier de balais au niveau de la surface d'étanchéité, ce qui réduit le risque d'incurvation du rotor et donc l'apparition de vibrations en spirale dangereuses. En outre, l'invention concerne une turbine à vapeur comportant un tel système de joint à brosses.
EP14741233.2A 2013-08-26 2014-07-08 Système de joint à brosses Ceased EP2992253A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310216933 DE102013216933B3 (de) 2013-08-26 2013-08-26 Bürstendichtungsanordnung
PCT/EP2014/064536 WO2015028177A1 (fr) 2013-08-26 2014-07-08 Système de joint à brosses

Publications (1)

Publication Number Publication Date
EP2992253A1 true EP2992253A1 (fr) 2016-03-09

Family

ID=50276573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14741233.2A Ceased EP2992253A1 (fr) 2013-08-26 2014-07-08 Système de joint à brosses

Country Status (6)

Country Link
US (1) US20160178062A1 (fr)
EP (1) EP2992253A1 (fr)
CN (1) CN105492806A (fr)
DE (1) DE102013216933B3 (fr)
RU (1) RU2623322C1 (fr)
WO (1) WO2015028177A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015223998B4 (de) 2015-12-02 2023-02-09 MTU Aero Engines AG Rotorvorrichtung mit Dichtabschnitt für eine Gasturbine
CN108488388A (zh) * 2018-04-27 2018-09-04 西安丁杰动力科技有限公司 一种高温高压气体回转面动密封装置
US11163340B2 (en) * 2019-07-09 2021-11-02 Apple Inc. Electronic devices with fiber composite friction hinges
KR102689031B1 (ko) * 2019-10-21 2024-07-29 삼성전자주식회사 방진 구조를 포함하는 전자 장치

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US885032A (en) * 1907-06-24 1908-04-21 Sebastian Ziani De Ferranti Fluid packing.
DE2344666C2 (de) * 1972-09-14 1982-10-14 General Electric Co., Schenectady, N.Y. Bürsten-Wellendichtung
US6168377B1 (en) * 1999-01-27 2001-01-02 General Electric Co. Method and apparatus for eliminating thermal bowing of steam turbine rotors
GB0126220D0 (en) * 2001-11-01 2002-01-02 Alstom Switzerland Ltd Brush seals
GB2393766A (en) * 2002-10-03 2004-04-07 Alstom A sealing arrangement for a turbine
US6790001B2 (en) * 2002-11-22 2004-09-14 General Electric Company Brush seal arrangement for high pressure applications
RU2293894C1 (ru) * 2005-06-30 2007-02-20 Федеральное государственное унитарное предприятие "Московское машиностроительное производственное предприятие "Салют" Щеточное уплотнение
DE102008055736A1 (de) * 2008-11-04 2010-05-12 Siemens Aktiengesellschaft Bürstenringdichtung für eine Turbomaschine und Turbomaschine mit einer Bürstenringdichtungsanordnung
US8100405B2 (en) * 2009-01-06 2012-01-24 General Electric Company System and method for providing compliant rotating seals
DE102013217581A1 (de) * 2013-09-04 2015-03-05 MTU Aero Engines AG Dichtungsanordnung in einer axialen Strömungsmaschine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015028177A1 *

Also Published As

Publication number Publication date
WO2015028177A1 (fr) 2015-03-05
US20160178062A1 (en) 2016-06-23
RU2623322C1 (ru) 2017-06-23
DE102013216933B3 (de) 2014-04-03
CN105492806A (zh) 2016-04-13

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