WO2012022550A2 - Dispositif d'étanchéité - Google Patents

Dispositif d'étanchéité Download PDF

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Publication number
WO2012022550A2
WO2012022550A2 PCT/EP2011/061951 EP2011061951W WO2012022550A2 WO 2012022550 A2 WO2012022550 A2 WO 2012022550A2 EP 2011061951 W EP2011061951 W EP 2011061951W WO 2012022550 A2 WO2012022550 A2 WO 2012022550A2
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
ring
segments
sealing device
components
Prior art date
Application number
PCT/EP2011/061951
Other languages
German (de)
English (en)
Other versions
WO2012022550A3 (fr
Inventor
Monika Schulte
Max Van Der Horst
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012022550A2 publication Critical patent/WO2012022550A2/fr
Publication of WO2012022550A3 publication Critical patent/WO2012022550A3/fr

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
    • F16J15/44—Free-space packings
    • F16J15/441—Free-space packings with floating ring
    • F16J15/442—Free-space packings with floating ring segmented
    • 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
    • F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
    • 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
    • F05D2240/40—Use of a multiplicity of similar components

Definitions

  • the invention relates to a sealing device with a
  • Ring seal for sealing a gap between two statically arranged components, the one
  • Sealing ring with a first sealing surface for abutment on one of the components and a second sealing surface for abutment with the other component comprises.
  • Turbo compressors are used to compress air or other gases to ultimate pressures of 100 bar and more. Their pressure chambers are therefore sealed against each other, so they are high
  • Sealing rings with a diameter of 2 m and more used. Such a sealing ring bears against the two components which are always static relative to one another and are to be sealed against one another, for example the compressor housing and the inner housing, and seals these components against one another.
  • the invention is based on the consideration that a
  • conventional sealing element such as an O-ring, either very pressure resistant and a differential pressure of 30 bar and more can seal, or it is elastic enough to compensate for temperature fluctuations of 100 and more Kelvin and associated material expansions of the components to be sealed can.
  • Turbo compressor can be compensated without the need for a highly elastic material.
  • Mobility of the segments to each other at least partially replaced elasticity of a conventional sealing element can be used on pressure-resistant materials, so that pressure differences of 40 bar and more against each other
  • the two components expediently each have a sealing surface, between which the annular seal is clamped.
  • the sealing surfaces of these two components may also be part of the sealing device, but this is not necessarily the case.
  • the two components are
  • Sealing surfaces of the sealing ring can therefore be fixed to the
  • sealing surfaces of the two components Apply sealing surfaces of the two components.
  • the mutually movable segments of the sealing ring are sealing elements, which serve to seal the gap between the components.
  • the two sealing surfaces of the sealing ring can be formed.
  • the sealing device comprises a
  • Holding device which holds the segments of the sealing ring in a predetermined position to each other. This can be done by one or more holding elements, the one
  • Retaining element is fixed.
  • each segment overlaps at its two tangential ends the respective adjacent segment.
  • Sealing surfaces are, for example, a radial sealing surface inwards and an axial sealing surface.
  • the overlap is designed so that the abutting surfaces of two adjacent segments are zappled overlapped, so the two adjacent segments
  • a further advantageous disclosed embodiment of the invention provides that the sealing ring has an inner ring and an outer ring placed around the inner ring, wherein both rings arranged in several tangentially behind each other
  • Segments can be segmented.
  • the inner Ring take over the sealing function of the sealing ring and the outer ring can be a holding function for holding the sealing ring
  • segment boundaries of the outer ring are conveniently tangent to the segment boundaries of the inner ring such that a segment boundary between two segments of the outer ring is above a segment of an inner ring and the entire region of a segment boundary is between two
  • Segments of the inner ring are located below a segment of the outer ring. To simplify the production, the segments of the outer ring can butt against each other without overlapping.
  • the two rings engage one another in a form-fitting manner, wherein the positive connection is expediently present at least in the axial direction.
  • the outer ring surrounds the inner ring on two shoulders, so that movement of the outer ring is blocked on the inner ring in both axial directions.
  • the two rings are positively connected to each other by at least one further element which engages positively in both rings.
  • Element may be a radial pin which is inserted into the inner ring and on which the outer ring is placed.
  • Sealing surface is pressed. This can be done by one
  • Spring element done, which is placed around the sealing ring or the segments.
  • the segments of the sealing ring can be pressed radially inward and thus on a radially inner sealing surface of the sealing ring or one of the components.
  • a single spring element and two or more spring elements can be used.
  • a simple assembly of the sealing ring between the components can be achieved if the spring element is a hose spring. This can be a spiral
  • Sealing ring incorporated a circumferential recess in the manner of a bed for receiving the spring element, so that it is guided in the axial direction.
  • Spring means is present for pressing the sealing ring against a sealing surface of one of the components.
  • the sealing ring on one of its outer surfaces has a slope over which can be pressed by applying a force in a direction on the sealing ring in a different direction.
  • the direction in which the force is applied is expediently the
  • the inclined surface is inclined at an angle between 10 and 80 ° to an axial surface which is perpendicular to the axial direction of the sealing ring.
  • the segments each have at least one recess on at least one of their sealing surfaces. This can be a surface pressure in the
  • Recess an elongated recess or recess in the tangential direction, in particular at least two parallel in the tangential direction depressions are advantageous, so that the sealing surface around and between the recesses form at least three parallel sealing regions in the sealing surface.
  • the elongation of the depressions may be given a tangential length which is at least three times greater than the axial width thereof.
  • Forming sealing ring a material is advantageous, which is both temperature resistant, advantageously up to 200 ° C, especially from -105 ° C to 200 ° C, as well as chemically
  • sealing device can also be used in conjunction with chemically aggressive media.
  • thermoplastics are suitable, in particular polyaryletherketones.
  • a sealing surface forming element of the sealing ring of polyether ketone (PEEK) is formed.
  • the invention is also directed to a
  • Compressor housing wherein the inner housing against the
  • FIG. 1 shows a cross section through a sealing device with a ring seal with a sealing ring between an inner housing and a compressor housing of a turbocompressor
  • FI G 2 is a schematic plan view of the sealing ring
  • FIG 1 a cross section through a ring seal with an outer ring and an inner ring, a cross section through another ring seal at a relation to FIG 3 other position of the ring seal, a perspective view of a section of a sealing ring and a perspective view obliquely radially outward on a segment of 1 shows a sealing device 2 between two components 4, 6 in a sectional view.
  • the sealing device 2 comprises a ring seal 8 with an inner ring 10, an outer ring 12 and a
  • Spring element 14 in the form of a hose spring which is completely wrapped around the outer ring 12.
  • Compressor housing 6 instead of the one-piece annular pressure plate 18 and several distributed on the circumference small printing plates are conceivable, in their entirety
  • the spring element 14 designed as a hose spring is likewise prestressed and presses the outer ring 12 radially inward against the inner ring 10 and presses it with its radial sealing surface 30 against the radial sealing surface 32 of the
  • the ring seal 8 seals a high pressure chamber A with a gas pressure p A against a low pressure chamber B with a pressure p B , wherein the ring seal 8 for the differential pressures
  • Compressor housing 6 and inner housing 4 are considered as part of the sealing device 2.
  • the inner ring 10 and the outer ring 12 form a sealing ring 33 of the ring seal 8, which simplifies in FIG 2 in a plan view in the axial direction 34 on the sealing surface 24
  • Ring seal 8 is for example 2.10 m. It can be seen that both the inner ring 10 and the outer ring 12 is divided into eight segments 36, 38, wherein between the segments 36 of the outer ring 12 each have a gap 40 and between the segments 38 of the inner ring 10, a gap 42 is indicated , The gap 40 extends in
  • Segments 36 abut each other butt.
  • the shape of the gap 42 extending between the segments 38 of the inner ring 10 is shown in more detail in FIG. In FIG. 2, the two rings 10, 12 are shown in an expanded state which may occur when the
  • Inner housing 4 and the compressor housing 6 are heated to, for example, 180 ° C and the sealing ring 33 through the Temperature expansion of the housing 4, 6 is extended radially outward.
  • the gaps 40, 42 between the segments 36, 38 are shown enlarged for the sake of clarity. From FIG 2 it is visible that the segments 38 each
  • each segment 38 overlaps both its extended and collapsed states with its two adjacent segments.
  • both the segments 36 and the segments 38 are designed to be movable relative to each other, so that they are movable toward and away from one another in the region of the gaps 40 and 42, respectively, by thermal movement of the housings 4, 6.
  • the inner ring 10 is - apart from its segmentation in eight segments 38 - made in one piece from PEEK, so that this material forms the two sealing surfaces 24, 30.
  • the outer ring 12 is also made of a plastic, but of a cheaper material.
  • FIG. 3 shows a cross section through a further annular seal 44 and the pressure plate 18 of the holding device 16.
  • the following description is essentially limited to the differences from the embodiment of FIGS 1 and 2, to which reference is made with respect to the same features and functions.
  • Substantially equal components are generally numbered by the same reference numerals and features not mentioned are in the following
  • Ring seal 44 a segmented inner ring 46 and a segmented outer ring 48 of the same materials, such as the inner ring 10 and the outer ring 12, which is pressed in this embodiment of two designed as hose springs spring elements 14 radially inward on the sealing surface 30.
  • the outer ring 48 is connected to the inner ring 46th pinned by a number of pins 50 which are evenly distributed over the circumference of the ring seal 44.
  • Each pin 50 is inserted into a cylindrical recess of the inner ring 46 and engages in a likewise cylindrical recess or through bore of the outer ring 48 a.
  • the inner ring 46 and the outer ring 48 are fixed immovably to each other in the tangential direction.
  • the outer ring 48 is placed over two shoulders 51 of the inner ring 46, so that the outer ring 48 is positively connected by its adapted to the shoulders 51 form in the axial direction 34 with the inner ring 46, so that both rings 46, 48 are rigidly connected to each other in the axial direction 34.
  • the two spring elements 14 are inserted in a circumferential outer ring 48 radially outer recess through which the two spring elements 14 in an axial position
  • Spring elements 14 can expand and contract without hooking, so that they apply their radial stress uniformly over the entire ring circumference to the outer ring 48.
  • the outer ring 48 is provided on its side facing away from the sealing surface 24 with an inclined surface 52, which with a
  • Sloping surface 54 of the pressure plate 18 corresponds.
  • the two inclined surfaces 52, 54 lie flat against one another when the pressure plate 18 is pressed against the inner ring 46.
  • Slanted surfaces 52, 54 divided into an axial component and a radial component, by which a compressive force in the radial direction on the sealing surface 30 of the inner ring 46 and on the sealing surface 32 of the inner housing 4 is amplified.
  • Wells 56 are spaced from each other.
  • FIG 4 is very similar to that of FIG 3, so that the same reference numerals
  • the screw head 60 of the screw 20 projects into a recess of both the inner ring 46 and the outer ring 48, which recess is dimensioned so that it just receives the head 60 with a small clearance of less than 1 mm from all sides.
  • the recess edges are shown in dashed lines in FIG. In this way, each of the eight segments 36, 38 of the ring seal 44 by a screw 20 in his
  • Sealing ring 33 wherein the following description is equally applicable to the sealing ring of the ring seal 44. Shown are the inner ring 10 with two partially
  • segments 38 and the outer ring 12 also with two partially shown segments 36. It can be seen that the segments 36 abut each other at a butt joint 62.
  • the segments 38 are executed dotted lapped, with a pin 64 of a segment 38 engages in a recess 66 of an adjacent segment 38.
  • the recess 66 can be seen in perspective in FIG. It is guided over only a portion of the axial extent of the sealing surface 30 and part of the radial extent of the sealing surface 24, so that the pin 64 and the body 68 of the adjacent segment 38 in a tangential slot 70 adjacent to each other and with a movement of the segments 38 to each other glide along. Accordingly, the pin 64 is guided only over part of the sealing surfaces 24, 30 of the corresponding segment 38.
  • FIG. 5 the hidden edges of the adjacent segments 38 are shown in dashed lines, the edges of the right segment 38 being dashed long and the invisible edges of the left segment 38 being fine

Abstract

L'invention concerne un dispositif d'étanchéité (2) comprenant un élément d'étanchéité annulaire (8, 44) destiné à étanchéifier un interstice entre deux composants (4, 6) disposés de manière statique l'un par rapport à l'autre, comprenant une bague d'étanchéité (33) présentant une première surface d'étanchéité (24) destinée à reposer contre un des deux composants (6) et une deuxième surface d'étanchéité (30) destinée à reposer contre l'autre composant (4). Un interstice annulaire présentant un diamètre d'au moins 1 m entre deux composants soumis à de la chaleur peut être étanchéifié de manière fiable lorsque la bague d'étanchéité (33) est divisée en plusieurs segments (36, 38) disposés l'un derrière l'autre de manière tangentielle et déplaçables les uns par rapport aux autres.
PCT/EP2011/061951 2010-07-21 2011-07-13 Dispositif d'étanchéité WO2012022550A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010031768.3 2010-07-21
DE102010031768 2010-07-21

Publications (2)

Publication Number Publication Date
WO2012022550A2 true WO2012022550A2 (fr) 2012-02-23
WO2012022550A3 WO2012022550A3 (fr) 2013-03-28

Family

ID=44628653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/061951 WO2012022550A2 (fr) 2010-07-21 2011-07-13 Dispositif d'étanchéité

Country Status (1)

Country Link
WO (1) WO2012022550A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014006338A1 (fr) * 2012-07-06 2014-01-09 Snecma Dispositif de joint d'etancheite de palier de turbomachine avec deux joints elastiques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60113069T2 (de) * 2001-05-30 2006-06-08 Techspace Aero S.A. Dichtungsanordnung für Turbomaschinenlager
SE526377C2 (sv) * 2003-04-03 2005-08-30 Flow Holdings Sagl Tätning för isostatpress, förfarande för framställning av densamma, isostatpress, lock, tätningshållare samt användning av tätning
US20080084030A1 (en) * 2005-05-05 2008-04-10 Florida Turbine Technologies, Inc. Segmented air floating seal
US7631879B2 (en) * 2006-06-21 2009-12-15 General Electric Company “L” butt gap seal between segments in seal assemblies

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014006338A1 (fr) * 2012-07-06 2014-01-09 Snecma Dispositif de joint d'etancheite de palier de turbomachine avec deux joints elastiques
FR2993024A1 (fr) * 2012-07-06 2014-01-10 Snecma Dispositif de joint d'etancheite de palier de turbomachine avec deux joints elastiques
CN104411922A (zh) * 2012-07-06 2015-03-11 斯奈克玛 用于涡轮机轴承的垫片装置,包括两个弹性密封件
JP2015522773A (ja) * 2012-07-06 2015-08-06 スネクマ ２つの弾性シールを含む、ターボ機械の軸受用のガスケット装置

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