EP0004482A2 - Einrichtung zum Schutz der Beschaufelung einer Dampfturbine - Google Patents

Einrichtung zum Schutz der Beschaufelung einer Dampfturbine Download PDF

Info

Publication number
EP0004482A2
EP0004482A2 EP79400033A EP79400033A EP0004482A2 EP 0004482 A2 EP0004482 A2 EP 0004482A2 EP 79400033 A EP79400033 A EP 79400033A EP 79400033 A EP79400033 A EP 79400033A EP 0004482 A2 EP0004482 A2 EP 0004482A2
Authority
EP
European Patent Office
Prior art keywords
pressure
turbine
balance
exhaust
stage
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
EP79400033A
Other languages
English (en)
French (fr)
Other versions
EP0004482B1 (de
EP0004482A3 (en
Inventor
Jean-Marc Pugnet
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.)
Creusot Loire SA
Original Assignee
Creusot Loire 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 Creusot Loire SA filed Critical Creusot Loire SA
Publication of EP0004482A2 publication Critical patent/EP0004482A2/de
Publication of EP0004482A3 publication Critical patent/EP0004482A3/xx
Application granted granted Critical
Publication of EP0004482B1 publication Critical patent/EP0004482B1/de
Expired 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
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
    • 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
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/02—Arrangement of sensing elements
    • F01D17/08—Arrangement of sensing elements responsive to condition of working-fluid, e.g. pressure

Definitions

  • the present invention relates to a device for protecting the movable blades of steam turbines.
  • the moving blades of the steam turbines are subjected to various stresses originating from the centrifugal force due to the rotation of the rotor, from the driving force of the steam deflected by the blades, and from variations in the thrust of the steam on these blades. These stresses create a state of stress in the material constituting the fins which must be limited taking into account the mechanical characteristics of this material in its conditions of use.
  • the maximum performance of a blading is a function of the steam flow rate passing through the corresponding stage and the enthalpy drop in this stage, ie the energy recoverable therein.
  • the simplest protection device usually used includes a pressure (or vacuum) switch installed at the exhaust, with one or more low thresholds, which then warns operators, in the event of a prohibitive drop in pressure or vacuum at 'exhaust, by triggering alarms and possibly safety devices.
  • a pressure (or vacuum) switch installed at the exhaust, with one or more low thresholds, which then warns operators, in the event of a prohibitive drop in pressure or vacuum at 'exhaust, by triggering alarms and possibly safety devices.
  • a pressure (or vacuum) switch installed at the exhaust, with one or more low thresholds, which then warns operators, in the event of a prohibitive drop in pressure or vacuum at 'exhaust, by triggering alarms and possibly safety devices.
  • the low threshold defined above is fixed whatever the steam flow rate, and is therefore not suitable for the operation of the machine.
  • the invention relates to a protection device which makes it possible to adapt the intervention threshold to the running of the machine, thereby creating a much greater operating flexibility.
  • FIG. 2 represents an identical diagram, but relating to the high power steps of the machine, the vertical line at straight line corresponding to the maximum vapor flow rate that can pass through the turbine.
  • FIG. 3 is another diagram of the same type, but relating to a turbine which can operate both for low flow rates and for high flow rates.
  • the portion located on the left corresponds to the protection of the first blades, and the portion located on the right to protect the last blades of the turbine.
  • the vertical line 1 again represents the maximum admissible flow rate in the turbine
  • curve 2 the blade protection limit, very close to a line in reality, delimiting with line 1 an area 3 of prohibited operation.
  • the characteristic 4 of normal operation of the machine which would in this case be condensation and at constant flow rate of cooling water, has been plotted.
  • Curve 5 represents the simple protection produced by the fixed threshold devices of the prior art
  • curve 6 the level of protection produced by the present invention: the area 7 delimited by the straight lines 5 and 6 therefore corresponds to the gain in possibility of safe operation obtained thanks to the invention.
  • a conventional counter-pressure turbine is recognized, provided, inter alia, with a steam inlet 8, with an adjustment valve 9, with injection sectors 10, with distributors 11, with a rotor 12 fitted with wheels 13 provided with blades 14.
  • the references 15 and 16 designate the rear and front bearings respectively, provided with their bearings 17 and 18. There are also the stop 19 and the exhaust flange 20.
  • the reference 21 also designates the instrumentation organs used for the speed regulation of the machine, the reference 22 a safety device, and the reference 33 the coupling to the driven machine, such as an alternator for example.
  • the turbine is further provided with an exhaust pressure tap 23 and a pressure tap on the first stage 24.
  • the invention is in fact based on the fact that the pressure at the stage is substantially proportional to the flow of steam passing through this stage. From the outlet 23, the exhaust pressure P E is therefore obtained and from the outlet 24 a pressure is obtained which is practically proportional to the flow rate, which will be designated by D.
  • a reference spring 29 makes it possible to exert on the lever 27 an additional torque.
  • the cross sections S 1 and S 2 of the bellows 25 and 26, and the lever arms A 1 and A 2 are chosen so that the ratio: is equal to the slope of the straight line 6 in FIG. 7 representing the protection for which the system is designed, after transposition into the coordinate system P E and D with the corresponding units.
  • FIG. 8 represents such a double sensor element, such as it can be installed on the back-pressure turbine of FIG. 5, the left part of the figure providing protection for the top stage, and the right part of it protection of the first floor thereof.
  • the invention finds its main use in the field of energy production by steam turbines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)
EP19790400033 1978-03-17 1979-01-16 Einrichtung zum Schutz der Beschaufelung einer Dampfturbine Expired EP0004482B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7807732A FR2420028A1 (fr) 1978-03-17 1978-03-17 Dispositif de protection des aubages d'une turbine a vapeur
FR7807732 1978-03-17

Publications (3)

Publication Number Publication Date
EP0004482A2 true EP0004482A2 (de) 1979-10-03
EP0004482A3 EP0004482A3 (en) 1979-10-17
EP0004482B1 EP0004482B1 (de) 1981-06-03

Family

ID=9205924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790400033 Expired EP0004482B1 (de) 1978-03-17 1979-01-16 Einrichtung zum Schutz der Beschaufelung einer Dampfturbine

Country Status (3)

Country Link
EP (1) EP0004482B1 (de)
DE (1) DE2960387D1 (de)
FR (1) FR2420028A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013586A1 (de) * 1996-09-26 1998-04-02 Siemens Aktiengesellschaft Dampfturbine sowie verfahren zur vermeidung der nassdampfbildung in einer dampfturbine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE726472C (de) * 1940-10-11 1942-10-14 Aeg Schutzvorrichtung gegen Wasserschlaege in Dampfturbinen
DE938425C (de) * 1952-02-10 1956-02-02 Licentia Gmbh Dampfturbinen-Sicherung, die bei unzulaessigen, infolge Versalzung oder Verschmutzung der Turbine auftretenden AEnderungen der Stufendruecke die Dampfzufuhr zur Turbine beeinflusst
DD97919A1 (de) * 1972-06-07 1973-05-21

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE726472C (de) * 1940-10-11 1942-10-14 Aeg Schutzvorrichtung gegen Wasserschlaege in Dampfturbinen
DE938425C (de) * 1952-02-10 1956-02-02 Licentia Gmbh Dampfturbinen-Sicherung, die bei unzulaessigen, infolge Versalzung oder Verschmutzung der Turbine auftretenden AEnderungen der Stufendruecke die Dampfzufuhr zur Turbine beeinflusst
DD97919A1 (de) * 1972-06-07 1973-05-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013586A1 (de) * 1996-09-26 1998-04-02 Siemens Aktiengesellschaft Dampfturbine sowie verfahren zur vermeidung der nassdampfbildung in einer dampfturbine

Also Published As

Publication number Publication date
EP0004482B1 (de) 1981-06-03
FR2420028A1 (fr) 1979-10-12
EP0004482A3 (en) 1979-10-17
FR2420028B1 (de) 1982-09-03
DE2960387D1 (en) 1981-09-10

Similar Documents

Publication Publication Date Title
EP2588718B1 (de) Übergeschwindigkeitsdetektion einer freien arbeitsturbine mittels eines drehmomentmessers
FR2526972A1 (fr) Dispositif de commande de couple a regulation de survitesse et procede de commande d'une transmission hydrostatique
CA2986771C (fr) Dispositif de regulation de la vitesse de rotation d'un arbre d'un generateur de gaz de turbomoteur de giravion, giravion equipe d'un tel dispositif et methode de regulation associee
EP2764281B1 (de) Verfahren und system zur steuerung eines antriebsstrangs in abhängigkeit von der temperatur eines hydraulischen drehmomentwandlers
EP1404978A2 (de) Hydraulikkreis für ein flugzeugbremssystem
FR2557217A1 (fr) Systeme de detection et d'avertissement de calage de rotation d'un compresseur
FR2646464A1 (fr) Procede et ensemble de commande d'un appareil de forage de roches
FR2548320A1 (fr) Installation de propulsion et de freinage pour vehicules
FR2777946A1 (fr) Dispositif ralentisseur monte dans le circuit d'echappement des gaz d'un vehicule equipe d'un moteur a combustion
EP0004482B1 (de) Einrichtung zum Schutz der Beschaufelung einer Dampfturbine
FR2492886A1 (fr) Appareil de commande detecteur d'altitude
EP1246733B1 (de) Verfahren und vorrichtung zur regelung des antriebsschlupfes für ein fahrzeug mit hydraulischem antrieb
EP0206855B1 (de) Verfahren und Vorrichtung zum Feststellen eines Flüssigkeitsdurchsatzes
EP2452130B1 (de) Rohr mit kreisquerschnitt und einem luftflussregler
EP0533567B1 (de) Schutzsystem gegen die Löschung einer Turbomaschine bei Eindrigen von Wasser oder Hagel
EP0046698A1 (de) Einrichtung und Verfahren zum Erkennen einer umlaufenden Strömungsablösung
EP3615828B1 (de) Verfahren zum thermischen schutz eines fahrzeugs, insbesondere eines kraftfahrzeugs, kupplungsvorrichtung
FR2785239A1 (fr) Procede permettant une adaptation de la course caracteristique d'accouplement d'un vehicule.
FR2557518A1 (fr) Installation a convertisseur de couple hydrodynamique pour l'entrainement d'un tracteur notamment a usage agricole et procede de mise en oeuvre
EP2067681B1 (de) Steuerungsverfahren und -vorrichtung einer Kupplung einer gesteuerten, mechanischen Getriebeeingangswelle zur Vermeidung der Vibrationen in der Schleichphase des Motors
EP0056233A1 (de) Diffusor mit Grenzschichtabsaugung
FR3117175A1 (fr) Procede de determination de l’etat de fonctionnement d’une eolienne
EP3728934B1 (de) Vorrichtung und verfahren zur verteilung eines fluids in einer industriellen anlage
EP1452705B1 (de) Drehzahlsteuervorrichtung für einen Hydraulikmotor insbesondere für einen Lüfter eines Kraftfahrzeuges
EP0239452B1 (de) Hydraulische Bremsregelung

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH DE GB IT

AK Designated contracting states

Designated state(s): CH DE GB IT

17P Request for examination filed
ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE GB IT

REF Corresponds to:

Ref document number: 2960387

Country of ref document: DE

Date of ref document: 19810910

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931231

Year of fee payment: 16

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

Ref country code: DE

Payment date: 19940103

Year of fee payment: 16

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

Ref country code: GB

Payment date: 19940106

Year of fee payment: 16

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

Ref country code: GB

Effective date: 19950116

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

Ref country code: CH

Effective date: 19950131

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

Effective date: 19950116

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

Ref country code: CH

Ref legal event code: AUV

Free format text: LE BREVET CI-DESSUS EST TOMBE EN DECHENANCE , FAUTE DE PAIEMENT, DE LA 17E ANNUITE.

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

Ref country code: DE

Effective date: 19951003

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