CH350306A - Steam turbine with regulated extraction - Google Patents

Steam turbine with regulated extraction

Info

Publication number
CH350306A
CH350306A CH350306DA CH350306A CH 350306 A CH350306 A CH 350306A CH 350306D A CH350306D A CH 350306DA CH 350306 A CH350306 A CH 350306A
Authority
CH
Switzerland
Prior art keywords
turbine
steam
extraction
steam turbine
flow
Prior art date
Application number
Other languages
German (de)
Inventor
Krueger Carl-August
Original Assignee
Licentia Gmbh
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 Licentia Gmbh filed Critical Licentia Gmbh
Publication of CH350306A publication Critical patent/CH350306A/en

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
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/023—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines the working-fluid being divided into several separate flows ; several separate fluid flows being united in a single flow; the machine or engine having provision for two or more different possible fluid flow paths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/345—Control or safety-means particular thereto

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)

Description

  

      Dampfturbine    mit geregelter     Entnahme       Die Erfindung betrifft eine Dampfturbine mit ge  regelter Entnahme.  



  Mit den Schwankungen der Entnahmemenge und  der Leistung sowie mit dem veränderlichen Entnahme  druck schwankt die Dampfmenge, welche den hinter  der Entnahmestelle befindlichen Turbinenteil durch  strömt, sehr; und mit ihr ändern sich, wenn der  Strömungsquerschnitt der     Beschaufelung    dieses Tur  binenteils unverändert bleibt, die Strömungsverhält  nisse und - bei geändertem Entnahmedruck - das  Wärmegefälle. Es verschlechtert sich also der Wir  kungsgrad dieses Turbinenteils und daher die Wirt  schaftlichkeit der Turbine.  



  Freilich hat man schon bei höheren Ansprüchen  an die Wirtschaftlichkeit Düsenregelung des der Ent  nahmestelle folgenden Turbinenteils vorgesehen. Da  durch wird der Strömungsquerschnitt nur in der ersten  Stufe, aber nicht in den übrigen Stufen dieses Tur  binenteils an die Dampfmenge angepasst.  



  Die Erfindung will in diesem Turbinenteil eine  bessere Anpassung des Strömungsquerschnittes an  die Dampfmenge erzielen. Die Erfindung besteht  darin, dass der hinter der Entnahmestelle befindliche  Turbinenteil der Dampfturbine     mehrflutig    ist, dass vor  jedem dieser Flutwege eine Drosselklappe vorgesehen  ist und dass je nach der diesen     Turbinenteil    durch  strömenden Dampfmenge Flutwege zu- oder abge  schaltet werden.  



  In der     Zeichnung    ist schematisch ein     Ausführungs-          beispiel    nach der Erfindung wiedergegeben.  



  An den     Hochdruckteil    11 der     Turbine,    der mit  einer Entnahme für Heizdampf über Leitung 12 ver  sehen ist, schliesst sich der     Niederdruckteil    mit den    Fluten 13, 14 und 15 an. In den     Überströmleitungen     zum     Niederdruckteil    sind gemäss der     Erfindung    die       Drosselklappen    16, 17 und 18 eingeschaltet. Bei ver  änderten     Heizdampfdrücken    infolge Änderung der       Heizdampfmenge    oder der Turbinenleistung werden  eine oder mehrere Fluten über die zugeordneten Dros  selklappen hinzu- oder abgeschaltet.

   Der Impuls für  die Ab- und     Zuschaltung    kann vom     einstellbaren     Druck im Wärmetauscher 19, der in der Entnahme  leitung 12 eingeschaltet ist, oder von einem Thermo  staten 21, der zur Überwachung der Warmwasser  leitung 22 eingeschaltet ist, gegeben werden. Die  gestrichelte Linie 20 zeigt die Impulsleitung vom  Thermostaten zu den     Drosselklappen-Betätigungen    16  bis 18.  



  Die Turbine kann somit entsprechend der jewei  ligen     Niederdruckdampfmenge    mit einer, zwei oder  drei Fluten gefahren werden. Erreicht wird dadurch  ein einfacher Aufbau der Anlage     einschliesslich    ihrer  Regelung und ein besserer Wirkungsgrad der Turbine  gegenüber den bisher bekannten     Drosselregelungen,     die sich darauf beschränkten, den Druck vor dem  gesamten     Niederdruckteil    anzustauen bzw. den Dampf  durchfluss zu     drosseln.  



      Steam turbine with regulated extraction The invention relates to a steam turbine with regulated extraction.



  With the fluctuations in the withdrawal amount and the power, as well as with the variable withdrawal pressure, the amount of steam that flows through the turbine part located behind the withdrawal point fluctuates a lot; and with it change, if the flow cross-section of the blading of this turbine part remains unchanged, the flow conditions and - with changed extraction pressure - the heat gradient. So it worsens the efficiency of this turbine part and therefore the economy of the turbine.



  Of course, even with higher demands on economy, nozzle control of the turbine part following the Ent take-off point has been provided. Since the flow cross-section is only adapted to the amount of steam in the first stage, but not in the other stages of this turbine part.



  The invention aims to achieve a better adaptation of the flow cross-section to the amount of steam in this turbine part. The invention consists in the fact that the turbine part of the steam turbine located behind the extraction point is multi-flow, that a throttle valve is provided in front of each of these flow paths and that, depending on the flow of steam, flow paths are switched on or off depending on this turbine part.



  An exemplary embodiment according to the invention is shown schematically in the drawing.



  At the high pressure part 11 of the turbine, which is seen ver with a withdrawal for heating steam via line 12, the low pressure part with the flows 13, 14 and 15 connects. According to the invention, the throttle valves 16, 17 and 18 are switched on in the overflow lines to the low-pressure part. If the heating steam pressures change due to a change in the amount of heating steam or the turbine output, one or more floods are switched on or off via the associated throttle valves.

   The pulse for disconnection and connection can be given by the adjustable pressure in the heat exchanger 19, which is switched on in the extraction line 12, or by a thermo stat 21, which is switched on to monitor the hot water line 22. The dashed line 20 shows the impulse line from the thermostat to the throttle valve actuators 16 to 18.



  The turbine can therefore be operated with one, two or three floods, depending on the respective volume of low pressure steam. This achieves a simple structure of the system including its control and a better efficiency of the turbine compared to the previously known throttle controls, which were limited to accumulating the pressure in front of the entire low-pressure part or throttling the steam flow.

Claims (1)

PATENTANSPRUCH Dampfturbine mit geregelter Entnahme, dadurch gekennzeichnet, dass ihr hinter der Entnahmestelle befindlicher Turbinenteil (13, 14, 15) mehrflutig ist, dass vor jedem dieser Flutwege eine Drosselklappe (16, 17, 18) vorgesehen ist und dass je nach der die sen Turbinenteil durchströmenden Dampfmenge Flut wege zu- oder abgeschaltet werden. PATENT CLAIM Steam turbine with controlled extraction, characterized in that its turbine part (13, 14, 15) located behind the extraction point is multi-flow, that a throttle valve (16, 17, 18) is provided in front of each of these flow paths and that depending on the turbine part this sen The amount of steam flowing through the flood path can be switched on or off.
CH350306D 1956-08-02 1957-06-20 Steam turbine with regulated extraction CH350306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE350306X 1956-08-02

Publications (1)

Publication Number Publication Date
CH350306A true CH350306A (en) 1960-11-30

Family

ID=6261159

Family Applications (1)

Application Number Title Priority Date Filing Date
CH350306D CH350306A (en) 1956-08-02 1957-06-20 Steam turbine with regulated extraction

Country Status (1)

Country Link
CH (1) CH350306A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2924157A1 (en) * 2007-11-26 2009-05-29 Gen Electric METHOD AND DEVICE FOR IMPROVED OPERATION WITH REDUCED LOAD OF STEAM TURBINES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2924157A1 (en) * 2007-11-26 2009-05-29 Gen Electric METHOD AND DEVICE FOR IMPROVED OPERATION WITH REDUCED LOAD OF STEAM TURBINES

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