EP0620359A1 - Abdichtungsvorrichtung für Leck in der Atmosphäre bei einer Dampfturbine - Google Patents

Abdichtungsvorrichtung für Leck in der Atmosphäre bei einer Dampfturbine Download PDF

Info

Publication number
EP0620359A1
EP0620359A1 EP94400794A EP94400794A EP0620359A1 EP 0620359 A1 EP0620359 A1 EP 0620359A1 EP 94400794 A EP94400794 A EP 94400794A EP 94400794 A EP94400794 A EP 94400794A EP 0620359 A1 EP0620359 A1 EP 0620359A1
Authority
EP
European Patent Office
Prior art keywords
rotor
grooves
enclosure
turbine
cover
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
EP94400794A
Other languages
English (en)
French (fr)
Other versions
EP0620359B1 (de
Inventor
Martial Naudin
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.)
Areva NP SAS
Original Assignee
Framatome SA
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 Framatome SA filed Critical Framatome SA
Publication of EP0620359A1 publication Critical patent/EP0620359A1/de
Application granted granted Critical
Publication of EP0620359B1 publication Critical patent/EP0620359B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam

Definitions

  • the present invention relates to a device for sealing leaks to the atmosphere of a steam turbine.
  • the steam turbines comprise a rotor arranged in an enclosure under vapor, means for sealing the vapor at each outlet of the rotor from said enclosure and means for supporting the rotor at each of its ends.
  • These rotor support means at each of its ends are generally formed by oil bearings comprising a cover and sealing means at the level of the passage of the rotor in each of these bearings.
  • Sealing devices of the static type are, for the bearings, formed by labyrinths which have the aim of preventing oil leaks by recovering "the boundary layers" of oil on the rotor, not yet centrifuged inside the bearing housing.
  • labyrinths which have the aim of preventing oil leaks by recovering "the boundary layers" of oil on the rotor, not yet centrifuged inside the bearing housing.
  • the effectiveness of these labyrinths is limited.
  • labyrinths can also be used to seal the vapor. However, these do not completely prevent leaks and only reduce them.
  • the vapor leak is vaporized in the labyrinth to be sent to an enclosure under slight vacuum.
  • the vapor leak is therefore neutralized and there is an aspiration of the fluid from the external medium and, as a result, an aspiration of any oil leaks in the vacuum enclosure.
  • the water condenses and the steam leaks mix with the oil leaks, which causes pollution of the condensed water.
  • Sealing devices of the dynamic type are known which are used in oil bearings.
  • patent CH-A-334,775 discloses a sealing system which acts by centrifugal effect by creating a local overpressure between the external medium and oil in the bearings. This system prevents oil leakage. However, it contributes to sucking moisture at the level of the passage of the rotor in the bearing and to pollute the oil contained in this bearing.
  • a dynamic sealing device which consists in producing a double barrier by sucking air in a non-humid zone and in dividing this air flow axially along the rotor towards the inside of the bearing and towards the outside environment.
  • This device requires installing means to create the axial flow which lengthens the rotor and which is detrimental in terms of the critical speed of the rotor and the number of aerodynamic stages which it is possible to install on the turbine.
  • the invention is not intended to replace the techniques commonly used for sealing steam turbines or bearing housings, but to propose a device for sealing leaks from steam and / or oil, particularly simple to implement, even on turbines already installed.
  • FIG. 1 schematically represents a steam turbine which comprises, in a conventional manner, an enclosure 1 in which a rotor 2 rotates.
  • This turbine also comprises, on the one hand, means 3 for sealing the vapor at each outlet of the rotor 2 of the enclosure 1, constituted for example by static linings held facing the rotor 2 and, on the other hand hand, means 4 for supporting the rotor 2 at each of its ends.
  • These means 4 for supporting the rotor are formed by oil bearings each comprising a cover 5 and sealing means 6 at the level of the passage of the rotor 2 in each of said bearings, constituted for example by static linings held facing the rotor 2.
  • the rotor 2 is provided, between the enclosure 1 and the cover 5 of each bearing 4, with deflectors formed for example by a flange 7 disposed on said rotor.
  • the device for sealing leaks to the atmosphere comprises means 10 for boosting each demarcated zone, at the level of the passage of the rotor 2, by the enclosure 1 of the turbine and by the cover 5 of the adjacent bearing 4 so as to seal leaks of steam and / or oil to the atmosphere during the operation of said turbine.
  • the means 10 for boosting pressure are formed by a ring 11 attached by conventional means such as for example screws, on the external face of the cover 5 of said bearing opposite the enclosure 1.
  • the means 10 for boosting pressure are also formed by a ring 11 attached by conventional means such as for example screws, on the outer face of the enclosure 1 arranged opposite the adjacent bearing 4.
  • the ring 11 has on its face opposite steam or oil leaks, stator grooves 12 arranged in a plane perpendicular to the axis of the rotor 2.
  • the grooves 12 are distributed cyclically with respect to each other.
  • the grooves 12 can be distributed asymmetrically with respect to each other.
  • Each groove 12 has a head end 12c opening onto an external circumference and a foot end 12d opening onto an internal circumference, said circumferences being concentric.
  • the grooves 12 are inclined at the same angle relative to a radius passing through the axis of the rotor 2 and one ends 12c or 12d of said grooves 12.
  • the straight line AB joining the head end 12c and the foot end 12d on one of the sides, for example the side 12a of each groove 12 forms with the axis CO passing through the rotor axis 2 and through said head end 12a, an angle ⁇ .
  • the grooves 12 can be inclined at a different angle to each other.
  • the sides 12a and 12b of each groove are parallel to each other.
  • each groove 12 can be divergent with respect to the axis of the rotor 2.
  • each groove 12 can be straight or curved.
  • the grooves 12 may have a flat bottom.
  • this ring is formed in two parts 11a and 11b.
  • a ring 11 can be mounted on the external face of the enclosure 1 at each outlet of the rotor 2 and on the external face of each bearing 4 opposite the enclosure 1 so as to prevent, on the one hand, any steam leak outside the enclosure 1 and, on the other hand, any oil leak outside each bearing 4.
  • the grooves 12 can be formed directly on the external face of the enclosure 1 at each output of the rotor 2, or on the external face of the cover 5 of each bearing 4 or on both at the same time.
  • the grooves 12 are oriented in the direction of rotation of the rotor 2.
  • the grooves 12 are formed on a ring integral in rotation with rotor 2 and are inclined in the direction of rotation of said rotor 2.
  • the grooves 12 are formed on the two parallel lateral faces of the flange 7 secured to the rotor 2 and disposed between the enclosure 1 of the turbine and the cover 5 of the adjacent bearing 4.
  • the grooves 12 are oriented in a direction opposite to the direction of rotation of the rotor 2.
  • stator grooves 12 associated with the rotation of the rotor 2 have an inclination such that they prevent the natural centrifugation of the air, and that they bring this air, by centripetal effect towards the interior circumference by creating a local overpressure preventing leaks of vapor and / or oil to the atmosphere during operation of the turbine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
EP19940400794 1993-04-13 1994-04-12 Abdichtungsvorrichtung für Leck in der Atmosphäre bei einer Dampfturbine Expired - Lifetime EP0620359B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304324A FR2704021B1 (fr) 1993-04-13 1993-04-13 Dispositif d'etancheite des fuites a l'atmosphere d'une turbine a vapeur.
FR9304324 1993-04-13

Publications (2)

Publication Number Publication Date
EP0620359A1 true EP0620359A1 (de) 1994-10-19
EP0620359B1 EP0620359B1 (de) 1998-06-10

Family

ID=9446006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940400794 Expired - Lifetime EP0620359B1 (de) 1993-04-13 1994-04-12 Abdichtungsvorrichtung für Leck in der Atmosphäre bei einer Dampfturbine

Country Status (3)

Country Link
EP (1) EP0620359B1 (de)
DE (1) DE69410871T2 (de)
FR (1) FR2704021B1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623357A (en) * 1945-09-06 1952-12-30 Birmann Rudolph Gas turbine power plant having means to cool and means to compress combustion products passing through the turbine
CH334775A (de) * 1954-07-09 1958-12-15 Gen Electric Kühleinrichtung an einer Wellenlageröldichtung
FR1505487A (fr) * 1966-10-28 1967-12-15 Guinard Pompes Perfectionnement aux joints tournants à régulation de fuite
DE2910693A1 (de) * 1979-03-19 1980-10-02 Barmag Barmer Maschf Abgasturbolader fuer brennkraftmaschinen
JPS5867910A (ja) * 1981-10-19 1983-04-22 Mitsubishi Heavy Ind Ltd 蒸気タ−ビン軸受部の油切り構造
EP0094111A1 (de) * 1982-04-15 1983-11-16 ALFA LANCIA INDUSTRIALE S.p.A. Dichtungsvorrichtung gegen Schmieröl für Drehwellenlager

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2623357A (en) * 1945-09-06 1952-12-30 Birmann Rudolph Gas turbine power plant having means to cool and means to compress combustion products passing through the turbine
CH334775A (de) * 1954-07-09 1958-12-15 Gen Electric Kühleinrichtung an einer Wellenlageröldichtung
FR1505487A (fr) * 1966-10-28 1967-12-15 Guinard Pompes Perfectionnement aux joints tournants à régulation de fuite
DE2910693A1 (de) * 1979-03-19 1980-10-02 Barmag Barmer Maschf Abgasturbolader fuer brennkraftmaschinen
JPS5867910A (ja) * 1981-10-19 1983-04-22 Mitsubishi Heavy Ind Ltd 蒸気タ−ビン軸受部の油切り構造
EP0094111A1 (de) * 1982-04-15 1983-11-16 ALFA LANCIA INDUSTRIALE S.p.A. Dichtungsvorrichtung gegen Schmieröl für Drehwellenlager

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"DRY RUNNING GAS SEALS.", WORLD PUMPS, no. 10, October 1985 (1985-10-01), MORDEN, pages 297 - 300 *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 159 (M - 228)<1304> 13 July 1983 (1983-07-13) *

Also Published As

Publication number Publication date
EP0620359B1 (de) 1998-06-10
DE69410871T2 (de) 1998-10-22
DE69410871D1 (de) 1998-07-16
FR2704021A1 (fr) 1994-10-21
FR2704021B1 (fr) 1995-07-07

Similar Documents

Publication Publication Date Title
FR2461150A1 (fr) Dispositif de joint d&#39;etancheite d&#39;huile pour turbogenerateur
EP0002157A1 (de) Pumpe
EP0626503A1 (de) Druckentlastungsvorrichtung für Lagerschmierräume
FR2675213A1 (fr) Systeme formant barriere pour l&#39;huile de lubrification des paliers d&#39;un compresseur centrifuge muni de joints d&#39;etancheite a labyrinthe installe dans un environnement confine.
EP0097549B1 (de) Anordnung um die Abdichtung eines Tauchmotors zu realisieren und sich darauf beziehender Motor
FR2867229A1 (fr) Palier a roulement de turbomachine a encombrement reduit
FR2962173A1 (fr) Pompe a vide de type seche
EP0063062B1 (de) Dichtung für Kreiselmaschine mit hydraulischer Flüssigkeit
FR2548752A1 (fr) Joint liquide pour gaz avec balayage de fluide
CA2647139C (fr) Montage des tubes de pressurisation d&#39;une enceinte interne dans une turbomachine
EP3580431B1 (de) Ring zur verminderung des überdrucks in der nähe der stromaufwärtigen dichtung eines lagergehäuses eines turbinen-strahltriebwerks
EP0620359B1 (de) Abdichtungsvorrichtung für Leck in der Atmosphäre bei einer Dampfturbine
FR3120661A1 (fr) Compresseur à spirales ayant une pompe à huile centrifuge
FR2565295A1 (fr) Pompe a vide rotative etanchee dans l&#39;huile
FR3045722B1 (fr) Compresseur electrique avec systeme d&#39;etancheite dynamique ameliore
EP1055848B1 (de) Dichtungsanordnung mit Auftrieb für Turbomaschinenlagergehäuse
EP3289222B1 (de) Elektrischer kompressor mit verbessertem dynamischem dichtungssystem
FR2927395A3 (fr) Bague de protection d&#39;un joint d&#39;etancheite dynamique entre une piece fixe et un arbre de transmission d&#39;un groupe motopropulseur d&#39;un vehicule automobile et groupe motopropulseur comportant une telle bague de protection
EP1496294A1 (de) Dichtungsvorrichtung für ein Wellenlager und Turbomaschine mit einer solchen Vorrichtung
FR3066533A1 (fr) Ensemble d&#39;etancheite pour une turbomachine
EP3775558B1 (de) Trockenlaufende vakuumpumpe
FR2804477A1 (fr) Dispositif d&#39;evacuation des gaz du carter d&#39;un moteur a combustion interne
FR3075252A1 (fr) Ensemble d&#39;etancheite
FR2656902A1 (fr) Dispositif d&#39;etancheite pour pompe, en particulier pour pompe a eau de circuit de refroidissement.
FR2697598A1 (fr) Dispositif de protection contre l&#39;entrée de particules et de polluants solides.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19950330

17Q First examination report despatched

Effective date: 19960626

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 69410871

Country of ref document: DE

Date of ref document: 19980716

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980707

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20040330

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040423

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040628

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050412

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050412

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050412

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051230

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20051230