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DE366826C - Device for controlling steam turbines with nozzle segments - Google Patents

Device for controlling steam turbines with nozzle segments

Info

Publication number
DE366826C
DE366826C DEA36348D DEA0036348D DE366826C DE 366826 C DE366826 C DE 366826C DE A36348 D DEA36348 D DE A36348D DE A0036348 D DEA0036348 D DE A0036348D DE 366826 C DE366826 C DE 366826C
Authority
DE
Germany
Prior art keywords
nozzle segments
steam
steam turbines
connecting lines
controlling steam
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.)
Expired
Application number
DEA36348D
Other languages
German (de)
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.)
AEG AG
Original Assignee
AEG AG
Publication date
Priority to DEA36348D priority Critical patent/DE366826C/en
Application granted granted Critical
Publication of DE366826C publication Critical patent/DE366826C/en
Expired legal-status Critical Current

Links

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
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like
    • 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
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/18—Final actuators arranged in stator parts varying effective number of nozzles or guide conduits, e.g. sequentially operable valves for steam turbines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Die Erfindung betrifft eine Dampfturbine mit auf verschiedenen Stellen ihres Umfanges verteilten Düsensegmenten, die 'durch Leitungen verschiedener Länge an einen gemeinsamen Dampfverteilungskasten angeschlossen sind, welcher die Absperrorgane für die einzelnen Düsensegmente enthält. Der Zweck der Erfindung ist, die bei den längeren Verbindungsleitungen infolge ungleicher Ausdehnung der dampfdürchströmten Teile auftretenden Spannungen auszugleichen. Dies wird gemäß der Erfindung dadurch erreicht, daß die Regelungsorgane für die einzelnen Düsensegmente derart nacheinander gesteuert werden, daß zuerst die Düsensegmente mit den kürzeren Vefbindungsleitungen und dann erst diejenigen mit den längeren Verbindungsleitungen eingeschaltet werden.
Der Gegenstand1 der Erfindung ist in der Zeichnung beispielsweise in einer Ausführung veranschaulicht.The invention relates to a steam turbine with nozzle segments distributed at different points on its circumference, which are connected by lines of different lengths to a common steam distribution box which contains the shut-off devices for the individual nozzle segments. The purpose of the invention is to compensate for the stresses occurring in the longer connecting lines as a result of the uneven expansion of the parts through which the steam flows. This is achieved according to the invention in that the regulating elements for the individual nozzle segments are controlled one after the other in such a way that first the nozzle segments with the shorter connecting lines and only then those with the longer connecting lines are switched on.
The subject 1 of the invention is illustrated in the drawing, for example, in one embodiment.

Hierin bezeichnet α einen Dampfverteilungskasten, welcher die Absperrorgane b für die auf den ganzen Umfang der Turbine verteilten Düsensegmente c, d, e, f enthält. Die Düsensegmente c, d stehen hierbei durch längere 'Verbindungsleitungen g mit der Dampfverteilungskammer a in Verbindung, während die Düsensegmente e, f unmittelbar an dieselbe angeschlossen sind.Here, α denotes a steam distribution box, which contains the shut-off devices b for the nozzle segments c, d, e, f distributed over the entire circumference of the turbine. The nozzle segments c, d are connected to the steam distribution chamber a by longer connecting lines g , while the nozzle segments e, f are directly connected to the same.

,Wird zuerst den Düsensegmenten e, f aus dem Dampfverteilungskasten α Frischdampf von einem bestimmten hohen Wärmegrad zugeführt, so hat der Dampf hinter den Düsen einen entsprechend geringeren Wärmegrad, der sich dem Gehäuse mitteilt und eine Ausdehnung !desselben nach allen Seiten hervorruft. Der gleiche Wärmegrad stellt sich auch in den Verbindungsleitungen g zwischen den Düsensegmenten c, d und der Dampfverteilungskammer α ein, so daß sich diese Leitungen g wie das Gehäuse nach oben und unten frei ausdehnen können, ohne daß eine schädliche Spannung in den Rohren g auftritt.If live steam of a certain high degree of heat is first supplied to the nozzle segments e, f from the steam distribution box α , the steam behind the nozzles has a correspondingly lower degree of heat, which is communicated to the housing and causes it to expand in all directions. The same degree of heat is also established in the connecting lines g between the nozzle segments c, d and the steam distribution chamber α , so that these lines g, like the housing, can freely expand upwards and downwards without damaging tension occurring in the pipes g.

Wird nun bei stärkerer Belastung der Turbine auch der Dampfztttritt zu den Düsensegmentem c, d freigegeben, so steigt zwar in den Verbindungsleitungen g der Wärmegrad auf den des Frischdampfes, wodurch eine entsprechende Spannung in den Rohren g hervorgerufen vritd. Diese ist aber bedeutend geringer, als wenn der Frischdampf zuerst durch die Düsensegmente c, d dem Gehäuse zugeführt würde, dia in diesem Falle das Gehäuse zunächst noch kalt ist und daher der ganze Wärmeunterschied zwischen Frischdampf und dem kalten Gehäuse sich in der Ausdehnung der Rohre g geltend machen würde. If the steam outlet to the nozzle segments c, d is released when the turbine is heavily loaded, the degree of heat in the connecting lines g rises to that of the live steam, causing a corresponding tension in the pipes g . However, this is significantly less than if the live steam were first fed to the housing through the nozzle segments c, d , because in this case the housing is initially still cold and therefore the entire heat difference between the live steam and the cold housing is in the expansion of the pipes g would assert.

Claims (1)

Patent-Anspruch :Patent claim: Einrichtung zur Regelung von Dampfturbinen mit auf verschiedenen Stellen ihres Umfanges angeordneten Düsensegmenten, deren zu einem gemeinsamen, ■die entsprechenden! Absperrorgane enthaltenden Dampf verteilungskasten führende Verbindungsleitungen untereinander verschiedene Länge besitzen, gekennzeichnet durch eine solche Anordnung der Steuerung für die Regelungsorgane der einzelnen Düsensegmente, daß zuerst die Düsensegmente mit den kürzeren Verbindungsleitungen und dann erst diejenigen mit den längeren Verbindungsleitungen eingeschaltet werden.Device for the regulation of steam turbines with on different places their circumference arranged nozzle segments, whose to a common, ■ the corresponding! Containing shut-off devices Steam distribution box leading connecting lines to each other have different lengths, characterized by such an arrangement of the control for the regulating organs of the individual nozzle segments that first the nozzle segments with the shorter connecting lines and only then those with the longer connecting cables are switched on. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DEA36348D Device for controlling steam turbines with nozzle segments Expired DE366826C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA36348D DE366826C (en) Device for controlling steam turbines with nozzle segments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA36348D DE366826C (en) Device for controlling steam turbines with nozzle segments

Publications (1)

Publication Number Publication Date
DE366826C true DE366826C (en) 1923-01-12

Family

ID=6929593

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA36348D Expired DE366826C (en) Device for controlling steam turbines with nozzle segments

Country Status (1)

Country Link
DE (1) DE366826C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4847039A (en) * 1987-10-13 1989-07-11 Westinghouse Electric Corp. Steam chest crossties for improved turbine operations
US4850793A (en) * 1987-10-13 1989-07-25 Westinghouse Electric Corp. Steam chest modifications for improved turbine operations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4847039A (en) * 1987-10-13 1989-07-11 Westinghouse Electric Corp. Steam chest crossties for improved turbine operations
US4850793A (en) * 1987-10-13 1989-07-25 Westinghouse Electric Corp. Steam chest modifications for improved turbine operations

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